Site Investigation | A Smart Method for Explaining Foundation Specifications by Identifying Abnormalities and Soil Quality on Site
Boring survey
Identify abnormal conditions and soil characteristics on-site to prevent differential settlement! Obtain the trust and safety of the client simultaneously with a strict assessment report from qualified specialists.
In residential construction, accidents caused by uneven settlement due to incomplete assessments of weak ground or embankment areas pose a significant risk that threatens the homeowner's livelihood and undermines the builder's trust. Relying solely on numerical data from ground surveys can lead to overlooking local anomalies such as surrounding retaining wall cracks or road subsidence, as well as special soil characteristics like Kanto loam, high-water-content clay, and humus soil, which may result in the selection of incorrect foundation specifications. This document explains the key points of a smart explanation technique to accurately identify site anomalies and soil structure, and to clearly communicate risks and countermeasures to homeowners. At Geotech, we conduct environmental checks by site supervisors and multifaceted analyses by specialized staff, including residential ground chief engineers and geological survey technicians. By combining a rigorous process in accordance with the ISO 9001 quality management system and a ground warranty of up to 50 million yen, we issue substantiated ground assessment reports. By presenting assured safety, we alleviate homeowners' concerns and support the establishment of long-term trust relationships.
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basic information
This document specifies the checklist items from the on-site investigation (such as cracks in retaining walls, exterior walls, and foundations, tilting of utility poles, road subsidence, etc.) and the specifications and standards based on soil classification techniques from various ground investigation tests (such as SWS tests, hand augers, SDS tests, and boring tests). It organizes the evaluation procedures for cohesion and friction angles for each soil classification (clay, sandy soil, gravelly soil, humus soil, loamy soil), the ground assessment flow based on QMS (including the assessment of artificial obstacles, retaining walls, embankments, etc.), as well as the standards for manual review and evidence management conducted by qualified personnel under the ISO 9001 certification process.
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Applications/Examples of results
It can be utilized for foundation planning of wooden and steel-framed houses in areas with uneven ground due to embankment construction, properties near retaining walls, uneven ground after the demolition of existing buildings, and regions with special soil distribution. It is optimal for establishing a quality management system that anticipates potential risks from abnormal site conditions and for obtaining technical backing to prevent differential settlement accidents caused by misjudgment. It can be used as a risk communication tool for residential builders and designers to explain the safety rationale and the validity of foundation specifications to clients, as well as a practical tool to eliminate unnecessary ground reinforcement proposals and gain customer trust.
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