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Optimizing pile length for small buildings through neighborhood data analysis and field surveys for urban planning.

Identified the supporting layer of the narrow site through neighboring data and on-site surveys. Prevented excessive design and achieved economical and safe optimization of pile length.

In urban planning and infrastructure development, there are many situations where construction of buildings or structures is required in limited spaces. Particularly in the construction of steel frame buildings on narrow lots, there are site-specific challenges such as the influence of adjacent buildings and restrictions on road widths. When it is difficult to bring in standard large boring survey machinery, accurately understanding the slope of the supporting layer becomes challenging, which may lead to excessive pile length design. Geotech's ground survey combines the analysis of neighboring data from its extensive ground information database "GEODAS," accumulated mainly in the metropolitan area, with precise on-site surveys using small self-propelled machines, to address these challenges. By analyzing surrounding boring column diagrams and N-value distributions in advance, and conducting sounding tests tailored to site constraints on-site, we can identify the depth of the supporting layer even in complex ground conditions by correlating both sets of data, thus calculating the optimal pile length without excess or deficiency. This achieves a balance between reducing material and construction costs and ensuring the necessary bearing capacity for the structure. 【Usage Scenarios】 - Construction of steel frame buildings on narrow urban lots - Sites with narrow access roads or delivery routes - Situations where the influence of adjacent buildings needs to be considered

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

basic information

**Features** - Surrounding analysis using the neighboring ground database "GEODAS" - Compatibility with narrow sites using compact, space-saving survey equipment - Implementation of optimal sounding tests tailored to site constraints - Identification of the depth of bearing layers even in complex ground conditions - Calculation of the shortest optimal pile length without excess or deficiency **Our Strengths** Geotech provides "total ground services," offering a one-stop solution for all ground-related tasks, from ground surveys and reinforcement design/construction for new buildings to settlement correction work for existing structures, soil contamination surveys, and ground information services. With extensive experience and reliable technology, we create the future of cities from the ground up.

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Ground investigation

Applications/Examples of results

It is ideal for the foundation design practice of mid- to low-rise steel buildings, mixed-use residential buildings, and apartment complexes built in densely populated urban areas or on small lots. It demonstrates its effectiveness in sites where adjacent buildings are extremely close, making it difficult to position large boring equipment, or in conditions where small transportation is necessary due to road conditions. It contributes to the decision-making of design offices and contractors who want to capture the slope of the supporting layer in sites with limited investigation areas, preventing unnecessary extension of pile lengths and inappropriate under-design. It can be widely utilized in architectural projects aiming to simultaneously reduce pile construction costs and ensure safety.

Ground Investigation | Technical documentation for clearly identifying the support layer of small-scale steel buildings and optimizing pile length through advanced comparison of neighboring data and precise on-site surveys | Geotech

TECHNICAL

Ground investigation service "Standard Penetration Test"

PRODUCT

Site Investigation | Environmental ground diagnosis aimed at reducing steel materials and optimizing pile length in the construction of small steel buildings through comparison of neighboring data and on-site precision surveys | Geotech

TECHNICAL

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