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Screw weight penetration test

Screw weight penetration test

Static penetration of the survey rod into the ground! We will determine the ground resistance value from the rotation speed and penetration amount.

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.

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  • Site and ground investigation
  • Weight penetration test

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Site Investigation | Structural Calculation Assessment of Uneven Ground at the Site of a Demolished Wooden Apartment

Site Investigation | Structural Calculation Assessment of Uneven Ground at the Site of a Demolished Wooden Apartment

Quantifying the uneven ground hidden in the site of the demolished building through multi-point measurements, and supporting the compliance of wooden apartment buildings with structural calculations and analyses for safe design.

This technology is a ground diagnosis service that precisely measures the risk of uneven ground subsidence remaining at the site of demolished wooden apartment buildings, facilitating structural calculations and building confirmation applications. In sites after demolition, differences in ground strength are likely to occur due to inadequate backfilling and remnants of old foundations, posing a risk of differential settlement after new construction. This measurement method uses multi-point screw weight penetration tests (SWS tests) to finely measure penetration resistance values at various depths, clearly data-fying the allowable bearing capacity of the entire site. From the obtained measurement results, we simulate the estimated deformation angles (tilt of the building) between measurement points and quantitatively verify the impact on the superstructure. By conducting analyses in accordance with the Ministry of Land, Infrastructure, Transport and Tourism notifications and the latest guidelines from the Architectural Institute of Japan, we enable smooth data reflection in structural calculation documents, allowing for the seamless progression of review procedures by designated confirmation inspection agencies. This allows for a rational foundation design that eliminates excessive reinforcement work, providing high structural safety and reliable evidence.

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  • Site and ground investigation
  • Geological Survey Company
  • Geological Survey
  • Weight penetration test

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Site Investigation | Prevention of Settlement Defects in Uneven Ground at the Site of a Demolished Wooden Apartment Building

Site Investigation | Prevention of Settlement Defects in Uneven Ground at the Site of a Demolished Wooden Apartment Building

Quantify the risk of uneven ground subsidence lurking in the site of a demolished structure through multi-point penetration tests, in order to prevent accidents and defects after the handover of wooden apartments.

This technology is a ground diagnosis service that precisely identifies the risk of uneven ground subsidence lurking in the demolition site of wooden apartment buildings, preventing uneven subsidence accidents and defect liability issues after handover. In the demolition site of old structures, insufficient compaction of backfill soil and underground obstacles can easily lead to significant strength discrepancies within the site, raising concerns about tilting incidents occurring after the building's completion. This service employs multi-point screw weight penetration tests (SWS tests) to meticulously measure penetration resistance values at various depths, visualizing uneven strata structures and localized weak areas. By calculating and simulating the estimated deformation angles (building tilt) from the resistance differences between measurement points, we quantitatively verify the impact on the structure. By providing objective and highly reliable ground data along with detailed analysis reports, we facilitate the smooth passage of third-party ground guarantee reviews and dramatically reduce after-risk for business owners and builders. We protect the asset value and business reliability of the completed apartments over the long term.

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  • Site and ground investigation
  • Geological Survey Company
  • Geological Survey
  • Weight penetration test

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Method for Analyzing Uneven Ground Settlement at the Site of Demolished Wooden Apartment Buildings for Architectural Design

Method for Analyzing Uneven Ground Settlement at the Site of Demolished Wooden Apartment Buildings for Architectural Design

Measured the uneven ground of the demolition site using multiple-point SWS tests to reduce the risk of differential settlement.

In architectural design, particularly in structural design, it is essential to accurately understand the characteristics of the ground to ensure the safety and long-term quality of buildings. Especially in the case of sites where wooden apartments have been demolished, the presence of remnants of old foundations and the unevenness of backfill can lead to the formation of "uneven ground," where the ground strength varies by location, increasing the risk of differential settlement after new construction. To prevent this risk, detailed ground surveys and appropriate analyses are indispensable. This service provides ground survey methods to identify the settlement risks associated with uneven ground at demolition sites. By conducting screw weight penetration tests (SWS tests) at multiple points, we can measure penetration resistance values in detail at various depths and continuously collect data on the hardness and softness of soil layers and the bias of self-sinking layers. Based on the acquired data, we evaluate the comparison of penetration resistance values between measurement points and estimate the deformation angle (tilt of the building) to quantify future settlement behavior. 【Usage Scenarios】 - New construction plans on sites of demolished wooden apartments - Sites where uneven ground is a concern - Assessment of differential settlement risks and development of countermeasures 【Benefits of Implementation】 - Avoidance of ground troubles specific to demolition sites - Provision of high structural safety and quality evidence - Support for the longevity of buildings and preservation of asset value

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  • Geological Survey Company
  • Ground foundation construction method
  • Pile and foundation work
  • Weight penetration test

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Site Investigation | Smart Foundation Selection Technique to Significantly Improve Design Efficiency and Prevent Excessive Reinforcement

Site Investigation | Smart Foundation Selection Technique to Significantly Improve Design Efficiency and Prevent Excessive Reinforcement

Enhance design efficiency and eliminate excessive reinforcement! By conducting detailed settlement calculations and soil bearing capacity analysis, derive optimal foundation specifications to significantly improve explanatory power to clients and increase order rates.

In the practice of residential architectural design, mistakes in ground evaluation and cost increases due to inappropriate reinforcement work are significant challenges for contractors and designers. There are cases where excessive reinforcement work is arranged based on overly cautious safety factors, prioritizing safety above all else, and instances where insufficient explanations to clients lead to distrust. This document provides a detailed explanation of the know-how for utilizing ground assessment to improve design efficiency while also offering smart explanations to clients. Geotech conducts high-precision analyses based on objective data, from preliminary database verification to detailed settlement calculations (mv method) and the calculation of allowable bearing capacity using official and academic recommended methods. It clarifies the rationale for adopting direct foundations such as mat foundations by eliminating unnecessary improvement work, and outlines the process for selecting the most cost-effective methods from surface improvement, column improvement, and various pile methods in case reinforcement is necessary. By providing persuasive explanatory materials, we aim to gain client understanding and contribute to speeding up design work and improving order acceptance rates.

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  • Geological Survey Company
  • Ground foundation construction method
  • Pile and foundation work
  • Weight penetration test

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Ground Investigation | Analysis Method for Measuring Settlement of Uneven Ground at the Site of a Demolished Wooden Apartment Building

Ground Investigation | Analysis Method for Measuring Settlement of Uneven Ground at the Site of a Demolished Wooden Apartment Building

By conducting multi-point SWS tests on the uneven ground of the dismantled site and analyzing the deformation angles between measurement points, we can proactively prevent the risk of differential settlement in wooden apartments.

This technology is a ground investigation method designed to precisely identify the risk of settlement caused by demolition debris left on the site of a wooden apartment building and uneven backfilled ground. In demolition sites, due to inadequate processing of old foundations and insufficient compaction of fill, uneven ground with locally varying strength is likely to form, posing a risk of differential settlement after new construction. This service employs multi-point screw weight penetration tests (SWS tests) to meticulously measure penetration resistance values at various depths, creating continuous data on the hardness and softness of strata and the bias of self-settling layers. Based on the acquired data, we evaluate the comparison of penetration resistance values between measurement points and estimate deformation angles (building tilt) to numerically calculate potential settlement behavior that may occur in the future. Additionally, we comprehensively consider the dispersion effect of building loads and the number of years elapsed, flexibly proposing optimal ground reinforcement plans ranging from surface improvement to pile methods. We aim to proactively avoid ground troubles unique to demolition sites, providing high structural safety and reliable quality evidence. We strongly support the longevity of buildings and the preservation of asset value.

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  • Geological Survey Company
  • Ground foundation construction method
  • Pile and foundation work
  • Weight penetration test

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Ground Investigation | Ground Guarantee Examination Compliance Measurement and Analysis Method at the Site of a Demolished Wooden Apartment

Ground Investigation | Ground Guarantee Examination Compliance Measurement and Analysis Method at the Site of a Demolished Wooden Apartment

Assess the risk of uneven ground at demolition sites using a rich database and rigorous judgment from qualified professionals, ensuring a smooth process for ground guarantee reviews and confirmation applications.

This technology is a ground diagnosis service that establishes reliable quality evidence and enables smooth application for confirmation and ground guarantee passage at the site of a wooden apartment demolition, where uneven ground due to the removal of old buildings is a concern. At demolition sites, there are worries about future settlement defects due to underground residual materials and uneven backfill density, making objective data that satisfies third-party organizations highly sought after. This measurement method utilizes not only penetration test data from multiple points but also the neighboring ground information from our proprietary database "GEODAS," which boasts an analysis record of 100,000 cases annually. By comparing and correlating the surrounding topographical and geological data with on-site measurement data, we conduct a highly advanced analysis of the unique deformation behavior and the spread of uneven strata specific to the demolition site. Furthermore, qualified staff, such as residential ground chief engineers, rigorously evaluate using a unique three-item, eight-factor standard, eliminating underestimation or misjudgment of data. We issue a highly reliable ground survey judgment report with clear grounds, fully supporting business owners and builders in meeting guarantee examination standards and ensuring safe apartment construction.

  • ボーリング.gif
  • Geological Survey Company
  • Ground foundation construction method
  • Pile and foundation work
  • Weight penetration test

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Site Investigation | Eco Reinforcement and Settlement Measurement Method for Uneven Ground at Wooden Apartment Demolition Sites

Site Investigation | Eco Reinforcement and Settlement Measurement Method for Uneven Ground at Wooden Apartment Demolition Sites

Precise measurements of the uneven ground at the demolition site will be conducted, and pinpoint reinforcement design will significantly reduce the excavation residual soil and CO2 emissions during the construction of wooden apartments.

This technology is an eco-ground measurement service that avoids excessive ground reinforcement in uneven ground at the site of demolished wooden apartments, achieving the suppression of drilling residual soil generation and reducing environmental impact. In sites after demolition work, high-cost pile construction or deep improvement is often selected uniformly across all points due to localized soft layers, resulting in a significant amount of industrial waste soil. This measurement method precisely identifies ground bearing capacity and soil classification using multi-point screw weight penetration tests (SWS tests) and optional SDS tests. It reflects the ground propagation characteristics of building loads (reduction effects at 2 meters and 2-5 meters below the foundation) in the analysis, leading to pinpoint reinforcement design limited to truly necessary locations and depths. This significantly reduces disposal costs for drilling residual soil and CO2 emissions associated with transportation, promoting environmentally conscious construction (ESG/SDGs). While ensuring high-level safety in uneven ground, it dramatically shortens and reduces construction costs, maximizing profitability for business owners.

  • ボーリング.jpg
  • Site and ground investigation
  • Geological Survey Company
  • Geological Survey
  • Weight penetration test

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