Ground investigation service "Standard Penetration Test"

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last updated：Nov 04, 2014

ジオテック

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It is the most commonly conducted ground survey during the design and construction of construction projects.

The ground investigation method commonly referred to simply as boring investigation is formally known as the boring and standard penetration test. This investigation utilizes holes drilled by boring (i.e., hollowing out) to conduct standard penetration tests that measure the hardness of the ground at intervals of 1 meter. It is usually conducted simultaneously with soil sampling. The data obtained from the standard penetration test is referred to as the N value, which can be used as a guideline for estimating the stability of the ground. 【Features】 ○ The most commonly conducted ground investigation during design and construction in construction projects. ○ Clarifies the composition of strata by excavating the investigation site and observing the soil. ○ Measures the N value to understand the relative hardness and compactness of the soil in situ. ○ Can advance through any deep or hard layers. For more details, please contact us or download the catalog.

Related Link - https://www.jiban.co.jp/service/survey/boring.htm

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【Advantages】 ○ Standardized testing methods in many countries, making evaluation and comparison of results easy ○ Current soil can be sampled, and observation of the soil is easy (can be used for physical soil tests) ○ The application fields of N values are established in various standards ○ A large amount of historical data has been accumulated ○ Confirmation of support layers (N value ≥ 50 for 5m continuous) is possible 【Disadvantages】 ○ A wide investigation space (more than two passenger cars) needs to be secured ○ Testing time is long (can take several days in some cases) ○ Costs are relatively high ○ In extremely soft ground, data can become rough ○ There are sounds from impacts and motors ● For more details, please contact us or download the catalog.