報国エンジニアリング List of Products and Services

We would like to introduce our "Groundwater Level Measurement Method (Chikachan)." This method utilizes the borehole immediately after the Screw Weight Penetration Test (SWS test) to measure groundwater levels. A perforated tube with a screw point at the tip is inserted, and an alternating current resistivity water level meter is used to measure groundwater levels quickly and with high precision. 【Features】 ■ Can measure water levels in the borehole (up to a depth of 10m) ■ Provides highly reliable water level measurements ■ Can penetrate into the ground ■ High-precision measurement cable ■ Allows accurate measurement of water level, water quality indicators, and salinity concentration *For more details, please refer to the related links or feel free to contact us.

• Ground improvement

The small-diameter steel pipe rotary insertion machine 'RES-20CV-3' is lightweight and compact, with a width of 1450mm and a weight of 3500kg, making it ideal for use in narrow spaces and locations with elevation differences where it is difficult to bring in heavy machinery. Thanks to the adoption of a high-bore mechanism, construction can be performed with low noise levels. It features a center hole design that allows for the gripping and installation of long small-diameter steel pipes at any desired position. This original product was developed in collaboration with the machinery manufacturer YBM. 【Features】 ■ The leader can be tilted forward, backward, and sideways up to 15° ■ Real-time display of construction data on a touch panel ■ Construction data can be recorded on a USB memory stick ■ Approved by the RES-P Construction Method Technical Committee *For more details, please refer to the materials. Feel free to contact us with any inquiries.

• Ground foundation construction method

We would like to introduce the soil contamination countermeasure work that we conduct. The remedial technology involves understanding the range and depth of non-compliant soil, followed by excavating and removing the non-compliant soil and backfilling with compliant soil. We provide countermeasure plans tailored to our customers' needs, including compliance with regulations such as the lifting of designated areas. Please feel free to contact us if you have any requests. [Soil Contamination Investigation] ■ Historical Investigation (Phase 1) ■ Overview Investigation (Phase 2) ■ Remedial Work (Phase 3) *For more details, please refer to the related links or feel free to contact us.

• Other civil engineering works

We would like to introduce the overview survey of soil contamination conducted by our company. Based on the results of historical investigations, we assess the potential for soil contamination. If all analysis values meet the standards, the survey is concluded. If any analysis values exceed the standards, a detailed investigation (to determine the extent of soil contamination) will be conducted. Please feel free to contact us if you have any requests. 【Detailed Investigation】 ■Individual Investigation ■Surface Area Determination ■Depth Range Determination *For more details, please refer to the related links or feel free to contact us.

• Geological Survey

We would like to introduce the historical investigation of soil contamination conducted by our company. We obtain four types of valid information to assess the land use situation, the usage of specific hazardous substances, the overview of soil or groundwater contamination, and to estimate the potential for contamination regarding the land and surrounding areas. We will demonstrate the process of identifying the types of specific hazardous substances for sampling and categorizing the risk of soil contamination. 【Valid Information】 ■ Land use situation ■ Usage of specific hazardous substances ■ Overview of soil or groundwater contamination ■ To estimate the potential for contamination *For more details, please refer to the related links or feel free to contact us.

• Geological Survey

We would like to introduce our "Foundation Raising Method." This method is used for the repair of buildings where ground subsidence has stabilized. It involves partially dismantling the foundation top and leveling the superstructure above the foundation using jacks. Please feel free to contact us if you have any inquiries. 【Features】 ■ Repairs buildings where ground subsidence has stabilized ■ Partially dismantles the foundation top and levels only the superstructure above the foundation using jacks *For more details, please refer to the catalog available for download below as "PDF Download."

• Ground foundation construction method

We would like to introduce our "Pressure Plate Method." This method is used for repair work when the supporting ground is shallow (approximately 1.5m). After excavating beneath the settled foundation, a steel plate is installed, and pressure is applied using hydraulic jacks to create a stable ground. This pressure plate serves as a reaction force for correcting the settlement. 【Features】 ■ Used for repair work when the supporting ground is shallow (approximately 1.5m) ■ After excavating beneath the settled foundation, a steel plate is installed, and pressure is applied using hydraulic jacks to create a stable ground. *For more details, please refer to the catalog available for download below.

• Ground foundation construction method

We would like to introduce our "Underpinning Method." This method involves excavating directly beneath the sunken foundation and using hydraulic jacks to return the tilted house to a level position. By using steel pipes driven into stable ground as support piles, there is a reduced risk of re-sinking, making this a reliable method for the future. Additionally, depending on the specifics, a 10-year warranty is also available for this method. 【Features】 ■ Excavate directly beneath the sunken foundation and use hydraulic jacks to level the tilted house ■ Use steel pipes driven into stable ground as support piles ■ Reduced risk of re-sinking, ensuring future reliability ■ A 10-year warranty is also available *For more details, please refer to the catalog available for download below "PDF Download."

• Ground foundation construction method

We would like to introduce our "Boring Survey (Standard Penetration Test)." In general civil engineering and construction work, it is said to be an effective survey method because it allows for a standard and direct confirmation of the ground. By excavating the actual ground and using the standard penetration test, it is possible to assess ground strength while simultaneously collecting soil samples. The collected soil samples can be analyzed through laboratory tests to understand the physical and mechanical properties of the soil. 【Features】 ■ Direct confirmation of the ground ■ Simultaneous collection of soil samples and assessment of ground strength ■ Ability to understand the physical and mechanical properties of the soil *For more details, please refer to the related links or feel free to contact us.

• Site and ground investigation

We would like to introduce our "Screw Weight Penetration Test." This method allows for continuous measurement of delicate data from soft ground, and the investigation equipment is compact, making it suitable for narrow sites, such as those for single-family homes and other lightweight structures. The investigation method involves inserting a survey rod with a screw tip into the ground statically, from which the ground resistance value is determined based on the rotation speed and penetration amount. 【Features】 ■ Continuous measurement of delicate data from soft ground ■ Compact investigation equipment that can be used in narrow sites ■ Suitable for investigating lightweight structures such as single-family homes *For more details, please refer to the related links or feel free to contact us.

• Site and ground investigation

The "Akatsuki Method" involves attaching a spiral wing steel plate to the upper part of a tip steel pipe, joining an axial steel pipe as a reinforcement material, and using a pile driver equipped with a rotary penetration device to rotate and penetrate it into the ground, utilizing it as ground reinforcement material. The tip of the reinforcement material, which receives significant ground reaction force, can be expanded as a wing section, and a main axial steel pipe with a smaller diameter than the tip steel pipe can be selected. Construction is possible not only with leader machines and pile driving vehicles but also, depending on the conditions, with an excavator. 【Application Range】 ■ Maximum construction depth: 10m (if soft layers continue and SWS is possible, up to 130D) ■ Applicable ground (tip ground): sandy soil (including gravelly soil), clayey soil ■ Applicable structures: - Buildings (3 stories or less, up to 13m in height, and a total floor area of 1500m2 or less) - Structures (retaining walls up to 3.5m in height, septic tanks, etc.) *For more details, please refer to the PDF materials or feel free to contact us.

• Ground foundation construction method

The "Alpha Force Pile Method" is a construction technique designed to increase strength by integrating the starting point of the wing and part of the tip closure cap. It allows for safe and speedy construction without dirtying the site, even in narrow spaces. By making the wing section uniform in width and smoothly spiral-shaped, and by adopting a single wing that does not disturb the surrounding ground during rotational penetration, the construction speed is increased and costs are reduced. 【Features】 ■ High strength and construction quality ■ High processing precision *For more details, please refer to the PDF materials or feel free to contact us.

• Ground foundation construction method

The "Environmental Pile Method / Environmental Pile S Method" is an ecological construction method that uses natural materials, specifically wood, as ground reinforcement materials. Wood that has been shaped into cylindrical or tapered forms is pressed into the ground using specialized machinery without rotation, and this is utilized as ground reinforcement material. The materials used for ground reinforcement have obtained eco-label certification after submitting safety documents for wood preservatives. 【Features】 ■ Third-party certification obtained for materials and methods ■ Two types of shapes and four lengths of materials to meet site needs ■ Reduces environmental impact and allows for the use of local wood ■ Excellent workability and cost performance *For more details, please refer to the PDF materials or feel free to contact us.

• Ground foundation construction method

The "RES-P Method" is a foundation reinforcement technique for residential buildings that strengthens the ground and prevents settlement by driving pipes (thin steel pipes) into weak soil, utilizing the combined effects of the soil and the pipes. It has obtained the Building Technical Performance Certification Evaluation from the Japan Building Disaster Prevention Association [Performance Evaluation No. 04-02]. We have received tremendous evaluations for its performance in various soft ground improvement projects to date. 【Features】 ■ Flat ground reinforcement method ■ No residual soil generated ■ No curing period required ■ Reinforcement possible up to a depth of 14m *For more details, please refer to the PDF materials or feel free to contact us.

• Ground foundation construction method

The "Ultra Column Method" is a mechanical mixing deep mixing treatment method that uses a cement-based solidifying material slurry. It employs a unique cross-shaped anti-rotation wing on the excavation head, which reduces the mixing issues caused by the soil rotation phenomenon that can occur in viscous ground. Additionally, by measuring the resistivity of the column immediately after construction with a mixing tester and confirming the mixing conditions, high-quality columns can be constructed. 【Features】 ■ Improved mixing efficiency with unique technology ■ Reliable quality control ■ Various improvement formats available ■ Suitable for small-scale buildings ■ Adaptable to various sites *For more details, please refer to the PDF materials or feel free to contact us.

• Ground foundation construction method

The "ef column method" is a construction technique that achieves superior support strength while reducing costs and environmental impact with a smaller diameter than conventional methods. This method includes the removal of the structure after construction and the restoration of the ground. By creating a core steel pipe at the center of the soil cement column and a solidified material milk layer around its periphery, it aims to integrate the improved body and enhance its compressive strength. Additionally, one of its features is that the removal of the columnar improved body can be easily performed. 【Features】 ■ Significant improvement in support strength due to the use of a core steel pipe ■ Small improvement diameter with high support strength ■ Easy removal of soil cement columns ■ Reduced cement usage, lowering costs and environmental impact ■ Smaller diameter reduces residual improved soil *For more details, please refer to the catalog or feel free to contact us.

• Ground foundation construction method