ジオテック List of Products and Services

In real estate development, accurately understanding the potential risks of land is essential for the success of the project. In particular, soil contamination resulting from past land use can lead to unexpected cost increases and development delays. Therefore, appropriate risk assessment before starting development and detailed investigations as needed are crucial. GeoTech, as a "designated investigation agency" by the Ministry of the Environment, formulates optimal investigation plans tailored to the client's objectives and land risks, and conducts accurate risk assessments. 【Application Scenarios】 - Risk assessment before purchasing new development land - Investigations before the demolition and reconstruction of existing buildings - Confirmation of soil contamination in land transactions - Environmental impact assessments in development plans 【Benefits of Implementation】 - Reduction of soil contamination risks associated with development - Prevention of unexpected additional costs and delays in construction timelines - Support for smooth acquisition of permits and approvals - Increased certainty in business planning

• Site and ground investigation
• Environmental Survey
• Geological Survey

In the demolition industry, it is important to confirm the presence or absence of soil contamination associated with building demolition work. Particularly, depending on the historical land use, there may be unintentional soil contamination, and it is necessary to understand this risk in advance and respond appropriately. If soil contamination is identified, there is also a risk of delays in demolition work and additional costs. GeoTech, as a "designated investigation agency" by the Ministry of the Environment, provides reliable one-stop consulting from soil contamination risk assessment before demolition to proposals for remediation measures in case contamination is discovered, as well as construction and management. 【Usage Scenarios】 - Investigation of land use history before demolition work - Voluntary screening investigations - Detailed investigations based on legal regulations - Proposals, construction, and management of remediation measures in case soil contamination is identified 【Benefits of Implementation】 - Risk assessment during the planning stage of demolition work - Prevention of construction delays due to unexpected soil contamination - Cost management through appropriate measures - Assurance of legal compliance

• Site and ground investigation
• Environmental Survey
• Other civil engineering services

In the construction industry, land surveys require careful consideration of future building plans and their impact on the surrounding environment, as well as an accurate understanding of the presence and risks of soil contamination. In particular, detailed investigations based on past land use history and geological characteristics are essential to prevent unexpected additional costs and delays in construction schedules. If soil contamination is identified, failing to take appropriate measures may hinder the progress of the project. Geotech, as a "designated investigation agency" by the Ministry of the Environment, provides a one-stop solution from risk assessment of soil contamination in land surveys to proposals for remediation measures in the event contamination is confirmed, as well as construction and management. 【Usage Scenarios】 - Preliminary surveys before acquiring new construction sites - Site surveys after the demolition of existing buildings - Voluntary risk management 【Benefits of Implementation】 - Reduction of risks in land acquisition - Optimization of costs and schedules during the planning phase - Compliance with regulations and environmental conservation - Smooth project advancement

• Pile and foundation work
• Other earthworks, foundation works, and exterior floors
• Other civil engineering services

In chemical plant sites and former sites, a wide variety of chemical substances are manufactured and used, making it essential to objectively understand the risk of soil contamination as a key to smooth business operations. Conducting early soil contamination investigations (historical surveys and soil condition surveys) during factory reconstruction, land sales, or ongoing operations directly relates to the proper assessment of future asset value and compliance with legal regulations. By identifying and quantifying contamination risks in advance from a neutral technical perspective, it is possible to prevent unexpected troubles and costs during transactions or construction, allowing for the formulation of rational budgets and business plans. Additionally, early detection during operations enables planned management and measures that minimize impacts on the surrounding area, providing significant benefits in maintaining and protecting the company's social credibility and a healthy operating environment over the long term.

• Site and ground investigation
• Environmental Survey
• Geological Survey

In transactions and redevelopment of former printing factories and binding shops, early detection of invisible soil contamination risks is essential. The harmful substances handled on-site vary greatly depending on the printing method and process, such as organic chlorine solvents widely used for offset blanket cleaning, hexavalent chromium as gravure cylinder plating solution, cyanide for undercoating, and lead derived from letterpress type. In particular, the drainage routes of organic chlorine solvents that were consumed and disposed of in large quantities during daily roller cleaning and plate development, as well as the risk of penetration into the floor, are the most critical points to focus on. The advantage of conducting early investigations lies in scientifically identifying these specific contamination risks, which can completely eliminate future risks of land value decline, construction delays, and legal setbacks considered illegal dumping, thereby enabling safe and rational land asset management and redevelopment planning.

• Site and ground investigation
• Environmental Survey
• Geological Survey

In the real estate appraisal standards, the presence or absence of soil contamination is clearly defined as an important individual factor in residential, commercial, and industrial areas, and it is one of the price formation factors that determine the utility and economic value of real estate. To make proper price assessments and judgments on the highest and best use, it is essential to clearly understand and analyze this risk from the perspective of market participants. Therefore, conducting a historical investigation (Phase 1) at an early stage before purchasing or transferring land is extremely beneficial in preventing unexpected declines in asset value and avoiding troubles during land transactions. Even if the land currently appears to have no issues, researching the history of past factories or similar establishments through residential maps or registries can help control the risks associated with the transfer in advance.

• Site and ground investigation
• Environmental Survey
• Geological Survey

In an operating factory, conducting an early soil contamination survey and quickly understanding the risks is extremely important to prevent potentially fatal losses in management and operations. By conducting the survey while the factory is in operation, appropriate measures can be swiftly implemented to prevent the spread of contamination to surrounding areas, even if contamination is discovered. Additionally, the greatest benefit is the increased likelihood of being able to "carry out soil contamination measures while continuing operations." Not only can one gain peace of mind by confirming the presence or absence of contamination early on, but it also allows for budgeting and planning for soil contamination remediation costs in preparation for future rebuilding or land sales. By anticipating risks from past land use through a historical survey (Phase 1) and confirming the presence of contamination and estimating appropriate costs through a soil condition survey (Phase 2), it is possible to avoid sudden declines in asset value and troubles during land transactions, thereby protecting long-term asset value and social credibility.

• Site and ground investigation
• Environmental Survey
• Geological Survey

This is the Swedish sounding test (SWS test) recommended in the "Guidelines for the Basic Design of Small-Scale Buildings" edited by the Architectural Institute of Japan. We will submit two separate reports that distinguish between objective data and ground diagnosis and considerations. All personnel responsible for on-site investigations and analytical considerations are certified ISO 9001 within the company, and we conduct wear measurements of the screw points each time to ensure testing accuracy. Furthermore, based on advanced data analysis utilizing the "GEODAS" database of 50,000 residential ground data in the metropolitan area, we will calculate allowable stress in accordance with building code notifications and propose optimal foundation specifications.

• Site and ground investigation
• Ground foundation construction method
• Pile and foundation work

This is a dynamic cone penetration test service that can obtain high-precision and continuous data as a complement to standard penetration tests and SWS tests. It addresses strata with N values exceeding 30, which are difficult to measure in SWS tests, and boasts excellent penetration capability of up to around N value 50. The main feature is the ability to obtain continuous data (Nd values) every 200 mm. By measuring the rod's rotational torque and automatically correcting for the effects of side friction, it calculates reliable data that correlates almost 1:1 with the N values of standard penetration tests (Nd = N), enabling accurate determination of bearing layers.

• Geological Survey Company
• Ground foundation construction method
• Pile and foundation work

This is a carbon fiber reinforcement system for existing concrete strip foundations that has obtained housing disaster prevention technology evaluation (evaluation number DPA-Housing Technology-23) from the Japan Architectural Disaster Prevention Association and has been registered as a utility model. By firmly adhering high-strength carbon fiber sheets to the foundation surface using matrix resin, it significantly improves shear strength, ductility, and seismic resistance. Unlike traditional underpinning methods that face many challenges in terms of weight, construction period, and cost, this system can reliably restore existing foundations with no reinforcement or deteriorated cracks to a robust supporting structure that far exceeds the original strength at the time of construction, without significantly changing the weight or cross-section of the structure.

• Renovation and repair methods
• Residential foundations
• Other earthworks, foundation works, and exterior floors

This method involves injecting grout (injection material) into the ground to lift and restore tilted or sunken buildings while simultaneously enhancing the ground's bearing capacity. The method consists of three "i (injection)" processes. First, repeated injections are made to form a "support plate" on the supporting layer. Next, injections are made beneath the foundation to create a "lift plate." Finally, "lift-up injection" is performed between the support plate and the lift plate to precisely raise the entire building. Utilizing laser measurement devices and computer-controlled three-dimensional tilt measurement systems, the tilt is continuously measured in real-time, allowing for precise leveling adjustments, making this a highly accurate, reliable, and safe construction technique.

• Renovation and repair methods
• Pile and foundation work
• Other earthworks, foundation works, and exterior floors

We provide settlement correction work based on advanced engineering for buildings that have experienced differential settlement. Using the most proven method, the "steel pipe pile driving method," we reliably drive steel pipe piles to the supporting ground using hydraulic jacks, with the weight of the building serving as the reaction force, thereby supporting and correcting the entire structure. This method not only allows for precise horizontal correction of severe tilting but also possesses high durability to prevent future re-settlement. Additionally, based on the engineering analysis of the ground and settlement conditions, we select the optimal method from a variety of options such as "pressure slab method," "building relocation and new foundation pile construction," and "cement milk injection method," ensuring a reliable solution is implemented.

• Renovation and repair methods
• Pile and foundation work
• Other earthworks, foundation works, and exterior floors

This is a ground improvement method that can be selected when weak layers are distributed at shallow depths. It involves uniformly mixing and stirring powdered cement-based solidifying materials with the original ground soil using heavy machinery, and carefully compacting it to construct a strong "slab-like improved body." This method demonstrates extremely excellent engineering effects in preventing differential settlement, increasing ground bearing capacity, and preventing liquefaction, reliably supporting important structures from the ground up. The construction process is characterized by low noise, low vibration, and short construction time, minimizing the impact on the surrounding environment. Through clear construction procedures and engineering approaches, it achieves reliable ground bearing capacity reinforcement as required by designers and supervisors.

• Ground improvement
• Ground foundation construction method
• Pile and foundation work

This is a reliable and secure method for reinforcing the ground with pile-like structures for single-family homes, which solidifies cement milk directly underground into pile shapes, demonstrating high quality and strength regardless of soil type. Using a drilling rod equipped with a conical excavation head, it advances to the support depth while laterally expanding the original ground and fills it with cement milk, creating high-quality pile-like columns. The greatest advantage is that the quality of the columns is not affected at all by the soil type, as the cement milk is not mixed with the local soil. By adopting a conical head, the risk of mixing excavated soil clumps is eliminated, and the construction principle that does not loosen the ground ensures stable and significant vertical bearing capacity.

• Residential foundations
• Renovation and repair methods
• Other civil engineering works

This is a soil-cement column method (deep mixing method) that uses a stepped steel pipe as the core material, which has obtained the architectural technology performance certification (GBRC Performance Certification No. 06-12 Revision 4) from the Japan Architectural Comprehensive Testing Institute, a general incorporated foundation. It is a high-performance hybrid method that combines the stable material strength of steel pipe pile methods with the large friction force of column methods, compensating for the disadvantages of each method, such as the variability in the strength characteristics of the columns and the small friction force of small-diameter steel pipe piles, thereby ensuring reliable high load-bearing capacity. Due to the core material effect, it prevents stress concentration at the head and supports the load along the entire length, significantly improving resistance to bending and shear forces during earthquakes, and minimizing the impact even if localized solidification issues occur.

• Residential foundations
• Renovation and repair methods
• Other civil engineering works

This is a ground improvement method that involves mechanically mixing cement milk and the soil of the original ground to a specified depth, creating a strong columnar improvement body underground. Due to the large diameter of the improvement body, it is expected to provide excellent lateral friction, ensuring effective settlement prevention even in very soft underlying ground with an equivalent N value of around 4. It can be widely adapted to thick soft layers, reliably transmitting the building's load to stable ground and supporting it from below. During construction, a construction machine equipped with multiple measuring devices is used, offering high-quality construction accuracy based on reliable engineering evidence and high reliability through strict quality control.

• Residential foundations
• Renovation and repair methods
• Other civil engineering works

This is a slurry-based mechanical mixing deep mixing treatment method that has obtained the Architectural Technical Performance Certification from the Japan Architecture Comprehensive Testing Institute (GBRC Performance Certification No. 12-17 Revision 1). It achieves extremely stable mixing performance with minimal variation, unaffected by soil type, thanks to a patented, uniquely developed mixing and stirring device. Numerous performance verification tests conducted on sandy soil, clay, and loam have demonstrated a reliable high quality with a coefficient of variation of 25% or less, providing highly reliable construction based on technical guidelines. Additionally, due to the small markup factor for quality control, excessive material usage can be suppressed, and strict quality inspections can be conducted at minimal cost by adopting "Inspection Method A" as a principle.

• Residential foundations
• Renovation and repair methods
• Other civil engineering works

This is a highly reliable pile foundation reinforcement method for small-scale buildings, including residential structures. It features a new spiral-shaped tip wing integrated with four excavation blades at the tip, allowing it to penetrate the ground while rotating. The rotary insertion construction minimizes vibration and noise, and it establishes an environmentally friendly design that generates no excavated soil (residual soil) during construction. Furthermore, by adopting an improved tapered tip wing, it allows for the selection of several types of steel pipes for a single tip structure, successfully achieving dramatic cost reductions and economical design while maintaining high construction performance and safety.

• Residential foundations
• Renovation and repair methods
• Other civil engineering works

The "SMD (Super Mini Drill) Pile Method," which has received certification from the Ministry of Land, Infrastructure, Transport and Tourism, utilizes steel pipe piles equipped with outer wings that are 2 to 3 times the diameter of the pile at the tip, along with unique inner wings and bites. During the rotary penetration, the tip is open, allowing soil to enter the steel pipe, which helps suppress misalignment during construction. Upon completion of penetration, the inner wings compact the soil inside firmly, achieving a high bearing capacity equivalent to complete closure, with a tip bearing capacity coefficient of α = 250. This method is a high-quality and eco-friendly foundation technique that generates no construction waste above ground, thereby eliminating industrial waste and reducing environmental impact and the risk of secondary pollution.

• Residential foundations
• Renovation and repair methods
• Other civil engineering works

This is a type of piled raft foundation method that has obtained the architectural technical performance certification (Performance Evaluation No. 04-02) from the Japan Architectural Comprehensive Testing Institute. It involves driving pipes (thin steel pipes) into weak ground, enhancing the bearing capacity through the combined action of the ground and the pipes, and preventing building settlement. Although this method arranges the pipes in a pile-like manner, it is categorized as a planar ground reinforcement method similar to "surface improvement methods" due to the close placement of the pipes rather than being a pile reinforcement. The design, construction, and supervision are centralized under the "Single-Family Housing Foundation Ground Reinforcement Research Association," and a reliable quality management system is provided under the guidance of Soil Design Office Co., Ltd.

• Residential foundations
• Renovation and repair methods
• Other civil engineering works

The ETP method is a type of rotary driven steel pipe pile construction that features a tip with a disc-shaped wing and a triangular excavation auxiliary bit. It has received certification from the Minister of Land, Infrastructure, Transport and Tourism (for sandy soil: TACP-0665, for clayey soil: TACP-0666) and a performance certification from the General Incorporated Foundation Japan Building Disaster Prevention Association (GBRC Performance Certification No. 12-20 Rev. 4), ensuring high bearing capacity and smooth construction. By avoiding the use of cement, it mitigates the risk of soil and groundwater contamination, and the no-excavation construction eliminates the need for soil disposal costs. Additionally, it allows for the removal of piles through reverse rotation and employs compact machinery, enabling low-noise and low-vibration construction, thus achieving an economical design and construction that considers the surrounding environment.

• Renovation and repair methods
• Residential foundations
• Other civil engineering works

This is an environmentally friendly ground reinforcement method using advanced winged steel pipes, which has obtained the architectural technical performance certification from the Japan Architectural Comprehensive Testing Institute (GBRC Performance Certification No. 09-19 Revision 5). It employs steel pipe piles equipped with disc-shaped wings at the ends, enhancing penetration by providing 30mm notches above and below the wings, and effectively suppressing deviation during construction with the aid of a drilling assist bit at the tip. Ground surveys are typically conducted using the Screw Weight Penetration Test (SWS Test), and in cases where the supporting layer is deep or the ground is difficult to penetrate, a large dynamic cone penetration test (SRS Test) can be accurately employed. This method offers a clean, environmentally friendly solution with low vibration, low noise, and no generation of residual soil.

• Renovation and repair methods
• Residential foundations
• Other civil engineering works

This is a pile-type ground reinforcement method using small-diameter steel pipes that has received the architectural technology performance certification (GBRC Performance Certification No. 10-01) from the Japan Architectural Institute Foundation. A cast iron spiral wing (tip wing) is attached to the tip of the small-diameter steel pipe, and it is rotated and driven into the ground using a non-discharging construction method with rotation torque. Since the tip wing and steel pipe are bolted together, the welding strength does not limit the bearing capacity. The construction is low-noise and low-vibration, taking into consideration the surrounding environment, and since it does not use cement milk, there are no costs for residual soil disposal. The entire process from component manufacturing to transportation and construction has been thoroughly reviewed, achieving both high performance and excellent economic efficiency.

• Residential foundations
• Renovation and repair methods
• Other civil engineering works

We provide evidence-based ground reinforcement construction that meets the needs of professionals involved in design and construction. Our company covers a diverse range of methods, including cement-based columns, steel pipe piles, and high-performance hybrid methods that combine these techniques, all of which have obtained building technology performance certifications and ministerial approvals. The biggest feature is the "optimal selection of methods" tailored to soil quality, surrounding environment, and structural loads. For example, we compare and examine the technical advantages of methods such as the Pure Pile method, which prevents soil mixing; the Tiger Pile method, which addresses humus soil; and the DM/ETP method, which minimizes environmental impact and excess soil costs without soil discharge, to derive the most economical and reliable design. By proposing a rational plan that thoroughly eliminates risks from an engineer's perspective, without biasing towards a single method, we strongly support your company's smooth project progress and ensure reliable quality management without setbacks.

• Residential foundations
• Other civil engineering works
• Renovation and repair methods

Are you having trouble disposing of the excess soil generated from construction work (such as construction-generated soil and root excavation soil)? Geotech provides reliable soil analysis that complies with the standards and regulations of receiving sites. As a designated investigation agency under the Soil Contamination Countermeasures Act, we propose optimal sampling and analysis methods tailored to the regulations of the receiving sites. With accurate analysis, we help avoid troubles, ensure a smooth handover of safe land, and support the smooth progress of construction with appropriate cost estimation.

• Site and ground investigation
• Environmental Survey
• Geological Survey

At gas stations, harmful substances related to oils and fats, such as benzene, which is a component of gasoline, boron derived from engine oil and coolant, and lead resulting from past use of leaded gasoline, have been handled. These substances pose a risk of leakage from fuel dispensers and underground tanks, making them important items in soil contamination investigations. In our survey, we thoroughly investigate the operational history and actual usage on the site to accurately assess the invisible underground risks.

• Site and ground investigation
• Environmental Survey
• Geological Survey

In the printing and binding industry, there is a possibility that chemical substances such as solvents have been used in past business activities, leading to concerns about soil contamination. Particularly when considering the sale or purchase of land or the establishment of new business locations, it is important to understand the presence or absence of soil contamination in advance to reduce future risks. Historical investigations involve researching how the land being considered for purchase was used in the past through old maps and registries, thereby evaluating the potential for soil contamination. 【Usage Scenarios】 - Risk assessment before land purchase - Investigation of former factory sites or old business locations - Compliance with environmental regulations - Confirmation of soil contamination during business succession 【Benefits of Implementation】 - Early detection of soil contamination risks and planning of countermeasures - Avoidance of unnecessary troubles and costs - Smooth facilitation of land transactions - Assurance of business continuity

• Site and ground investigation
• Environmental Survey
• Geological Survey

In the electronic components manufacturing industry, there may be concerns about the emission of fluorocarbons during the manufacturing process and the risk of soil contamination due to past land use. These contaminations become significant issues in responding to environmental regulations and future land use planning. Conducting appropriate soil contamination investigations and understanding the risks is essential for compliance and business continuity. GeoTech's soil investigation services provide tailored investigation plans and risk assessments based on customer needs, and in the event that contamination is discovered, we offer consistent consulting up to remediation measures as a designated investigation agency. 【Usage Scenarios】 - Soil contamination risk assessment for factory sites and planned new construction sites - Regular soil monitoring for compliance with environmental regulations - Investigation of land with a history of fluorocarbon use 【Benefits of Implementation】 - Early detection of environmental risks and implementation of appropriate measures - Ensuring business continuity through compliance with legal regulations - Contributing to the maintenance and enhancement of land asset value

• Site and ground investigation
• Environmental Survey
• Geological Survey

In the printing industry, there are many opportunities to use chemical substances such as solvents in business activities, raising concerns about the risk of soil contamination. In the event that soil contamination occurs, there will be impacts on business continuity and a need for environmental consideration. GeoTech's soil contamination surveys are planned according to customer requests and survey objectives, ranging from historical investigations to detailed surveys, and appropriate risk assessments are conducted. As a designated survey organization, we provide consistent consulting services, including assistance with remediation measures if soil contamination is identified. 【Usage Scenarios】 - Historical investigations within factory premises - Regular checks of environmental risks - Understanding soil conditions during relocation or sale - Confirming the absence of impacts on neighboring areas 【Benefits of Implementation】 - Early detection of potential soil contamination risks - Compliance with laws and regulations and response to environmental conservation - Support for the development of business continuity plans (BCP) - Maintaining trust from the local community

• Site and ground investigation
• Environmental Survey
• Geological Survey

In the metal refining industry, managing the risks of soil contamination due to heavy metals associated with business activities is of great importance. It is particularly necessary to accurately assess whether there is any impact on the soil in operational areas and based on historical records, and to implement appropriate measures. Early confirmation of the presence or absence of soil contamination and reducing future environmental risks are essential for the sustainability of companies and coexistence with local communities. Geotech's soil contamination surveys respond to the needs of the metal refining industry by providing accurate risk assessments and consulting. 【Usage Scenarios】 - Understanding the heavy metal contamination status within business premises - Preliminary surveys for new business site locations - Contamination risk assessments based on past operational history - Investigations for compliance with environmental regulations 【Benefits of Implementation】 - Early detection and reduction of soil contamination risks - Support for planning appropriate remediation measures - Strengthening environmental compliance - Maintenance and enhancement of corporate value

• Site and ground investigation
• Environmental Survey
• Geological Survey

In the chemical industry, risk assessment of soil contamination associated with operations is crucial. It is necessary to understand the impact of past business activities and the surrounding environment, and to manage future environmental risks appropriately. Accurately assessing the presence and extent of soil contamination is essential not only for legal compliance but also for building trust with the local community. Geotech's soil investigation services provide appropriate risk assessments based on specialized knowledge to support the continuity of your business. 【Usage Scenarios】 - Risk assessment of soil contamination within factory premises - Environmental impact assessment before the construction of new business sites - Verification of soil contamination based on past operational history - Regular soil investigations for legal compliance 【Benefits of Implementation】 - Early detection of potential soil contamination risks - Support for the development of appropriate risk management plans - Strengthening of environmental compliance - Contribution to the formulation of business continuity plans (BCP)

• Site and ground investigation
• Environmental Survey
• Geological Survey

This is the most commonly conducted ground investigation during the design and construction of building works. By excavating the investigation site and directly observing the soil, the stratification is clarified. To understand the hardness and compaction of the soil in its natural state, a standard penetration test is conducted to measure the N value. Additionally, it accommodates in-situ tests such as in-hole horizontal loading tests using boreholes, as well as sampling of undisturbed soil samples.

• Geological Survey Company
• Ground foundation construction method
• Pile and foundation work

This is a ground survey targeting small-scale buildings, combining hand auger boring with the Swedish Weight Sounding (SWS) test. In addition to measurements from the SWS, the soil conditions directly beneath the foundation base are actually verified. By combining soil information such as clay, sandy soil, humus soil, and loam with SWS data, the accuracy of predicting ground subsidence is significantly improved, enabling the determination of appropriate foundation specifications and the reliable design of ground reinforcement works in soft ground.

• Geological Survey Company
• Geological Survey
• Site and ground investigation

This is an indoor testing service conducted using collected samples for the purpose of various examinations and the setting of soil parameters required during the design phase of construction work. A sampler is lowered from the bottom of the borehole, and by applying a penetration load, "undisturbed samples" are obtained for indoor soil tests, including mechanical tests. By accurately measuring and analyzing reliable soil data, we provide high-quality soil parameters that serve as a basis for advanced structural design, such as liquefaction assessment and consolidation settlement calculations.

• Geological Survey Company
• Geological Survey
• Site and ground investigation

This is a ground investigation service that applies a load through a rigid loading plate on the original ground and precisely examines the relationship between the magnitude of the load and the amount of settlement of the loading plate to investigate the bearing capacity characteristics such as ground deformation and strength. A significant advantage is that it directly measures the foundation ground of structures, making the obtained results easy to understand. By providing reliable in-situ data, it strongly supports safe and reliable decision-making in design and construction for construction projects.

• Geological Survey Company
• Ground foundation construction method
• Pile and foundation work

The Automatic Ram Sounding test has a high correlation with the N value and allows for high-precision investigations as a complementary survey to standard penetration tests and SWS tests. The Automatic Ram Sounding test is one of the dynamic cone penetration tests, with a relatively simple investigation method and a penetration capacity of around N value 50, enabling continuous data collection (Nd values) every 200 mm. Additionally, a high correlation has been observed between Nd values and the N values from standard penetration tests.

• Geological Survey Company
• Geological Survey
• Site and ground investigation

Geo-column method Surface improvement method Small diameter steel pipe pile method ETP method SMD steel pipe pile method ETP-G method RES-P method Tiger pile Σ-i method DM method Pure pile method Cross-wing column method

• Ground foundation construction method
• Ground improvement
• Pile and foundation work

A method of injecting and mixing cement milk (a mixture of cement-based solidifying material and water) into soft ground to create columnar improved piles underground. This method is applicable when the soft layer extends from GL-2.0m to approximately GL-8.0m. However, it is not applicable in cases where most of the soft layer consists of humus soil, where industrial or household waste is accumulated, where there is groundwater, or where buildings are constructed immediately after earthworks on former marshland. Good ground for determining the improvement depth is defined as a continuous layer of cohesive soil with an N value greater than 3, or granular soil with an N value greater than 4.

• Ground improvement
• Ground foundation construction method
• Pile and foundation work

A method that involves spreading cement-based solidifying materials on soft ground, mixing, stirring, and compacting them with the original soil to create a slab-like solidified body. This method is applicable when the soft layer is distributed at a depth of GL-2.0m or shallower. However, it is not applicable if there is a water level within the improvement depth that makes mixing and stirring difficult, or if the improvement area extends to neighboring properties or roads, raising concerns about impacts on boundary blocks, neighboring houses, roads, etc. Good ground for determining the improvement depth is generally defined as a continuous layer of cohesive soil with an N value greater than 3 for cohesive soil and greater than 4 for granular soil.

• Ground improvement
• Ground foundation construction method
• Pile and foundation work

A support pile method using general structural carbon steel pipes STK-400 to support small-scale houses when the column improvement method cannot be applied, and when the building's load is supported only by the tip of the pile. This method is applicable when soft layers continue to a depth of GL-8.0m or more. In the case of steel pipe pile methods, there is a relationship between the building and the surrounding ground, and if adopted in areas where extreme ground subsidence occurs, it may lead to the phenomenon of the building lifting up (such as when embankment is done on extremely soft ground or ground with thick deposits of humus). The supporting ground for determining the length of the steel pipe pile is defined as having an N value of ≧15. The thickness of the supporting ground layer should, in principle, be continuous for more than 2.0m.

• Ground improvement
• Ground foundation construction method
• Pile and foundation work

When planning a basement for structures that exceed the design ground bearing capacity of 30 kN/m² → When it is necessary to embed the foundation to the angle of repose (30° line) For structures that are difficult to approve with ground improvement and would be over-spec with PC piles → Steel-framed buildings of 3 to 4 stories / retaining walls with a design ground bearing capacity of less than 100 kN/m², etc.

• Ground improvement
• Ground foundation construction method
• Pile and foundation work

Leading Edge Wing Easy to penetrate with a simple shape. Design possible with simple testing Design possible with SWS testing and ram sounding testing. Low noise, low vibration, and no spoil, environmentally friendly Extremely low vibration and noise, considerate of the surrounding environment, with no generation of residual soil, making it an environmentally friendly clean construction method.

• Ground improvement
• Ground foundation construction method
• Pile and foundation work

The RES-P method is a type of piled raft foundation method. It involves driving pipes (thin steel tubes) into weak ground, strengthening the ground through the combined effect of the ground and the pipes to prevent settlement, and is a foundation reinforcement method for residential buildings.

• Ground improvement
• Ground foundation construction method
• Pile and foundation work

The Tiger Pile method combines the stable material strength of steel pipe pile methods with the large frictional force of soil cement column methods, compensating for the variability in column strength that is a disadvantage of the soil column cement method with the steel pipe, while the soil cement column method compensates for the small frictional force that is a disadvantage of the steel pipe pile method, effectively canceling out the shortcomings of both methods and demonstrating high bearing capacity.

• Ground improvement
• Ground foundation construction method
• Pile and foundation work

Compatible with all types of ground The Σ-i method is a highly versatile ground reinforcement technique that is compatible with all types of ground, including sandy, gravelly, and clayey soils. Design using the converted N values from SWS tests (screw weight penetration tests) and ram sounding tests is possible.

• Ground improvement
• Ground foundation construction method
• Pile and foundation work