Ground reinforcement work | Achieving smooth examination applications with the ETP method certified by the Minister.

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Ground reinforcement work

last updated：Sep 26, 2026

ジオテック

The reliability of solid ground reinforcement supported by ministerial certification and technical performance proof. The ETP method, which has obtained public certification, facilitates a smooth review of application for confirmation and demonstrates safety.

This document explains the importance of public certification in "ground reinforcement work" and the reliability of the "ETP method" for building owners and designers who prioritize compliance with laws and regulations, structural safety, and the smooth facilitation of reviews. In construction planning, foundation work with ambiguous bases can lead to delays in confirmation applications and risks of structural accidents. The ETP method is an advanced winged rotary driven steel pipe pile method that has received certification from the Minister of Land, Infrastructure, Transport and Tourism and GBRC architectural technology performance certification. Based on technical evaluations from public institutions, it allows for the objective calculation of allowable bearing capacity in both pushing and pulling directions, enabling extremely smooth completion of building confirmation applications and conformity assessments. With a total of 16 sizes of pile diameters ranging from φ89.1mm to φ609.6mm and high-strength 590N-grade steel pipes, it allows for efficient and rational structural design through standardized calculation formulas. GeoTech Co., Ltd. provides reliable construction data and comprehensive ground guarantees under a construction management system that records real-time penetration data and strict operations by certified engineers.

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basic information

This construction method is a public standard-compliant rotary-driven steel pipe pile method that has obtained certification from the Minister of Land, Infrastructure, Transport and Tourism (Push-in: TACP-0665/0666, etc.) and GBRC architectural technical performance certification (Pull-out: No. 12-20). It offers a lineup of shaft steel pipe diameters ranging from φ89.1mm to φ609.6mm (a total of 16 sizes) and allows for the selection of high-strength 590N grade steel pipes. The maximum construction depth is 63.6m for sandy ground and 59.43m for clayey ground (57.0m for diameters of φ508.0mm and above). It features a no-dirt-discharge construction method that does not use cement, ensuring compliance with regulations and environmental performance.

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Applications/Examples of results

It is applicable to a wide range of structures, from general residential buildings with a total floor area of 500,000 square meters or less, to mid- and high-rise buildings, commercial facilities, factories, warehouses, and public facilities such as government offices. It is particularly suitable for structural calculation projects where there is a desire to clarify the evaluation basis during the building confirmation application process, as well as for compliance-focused corporate projects that require strict adherence to regulations. Additionally, it is widely used in situations where highly reliable foundation design backed by public certification is needed for the foundation reinforcement of structures such as retaining walls, towers, and tanks.