Site Investigation | Optimizing Pile Length for Small Steel Buildings through Neighboring Data Analysis and On-Site Surveys
By integrating neighboring data and on-site surveys, we identify the supporting layers of small-scale steel buildings. This prevents excessive design and achieves economical and safe optimization of pile lengths.
In low to mid-rise steel buildings constructed on narrow sites, there are site-specific challenges such as the proximity of adjacent buildings and restrictions on the width of the front road, making it difficult to bring in standard large boring survey machinery and accurately grasp the inclination of the supporting layer. GeoTech addresses this issue fundamentally by integrating the analysis of neighboring data from its extensive geotechnical information database "GEODAS," accumulated mainly in the metropolitan area, with precise on-site surveys using small self-propelled machines. By analyzing existing boring column diagrams and N-value distributions around the planned site from multiple perspectives in advance, we can accurately predict the inclination trends and continuity of the supporting layer. On-site, we conduct optimal sounding tests tailored to site constraints to obtain actual physical data. By precisely correlating and cross-referencing both sets of data, we can clearly identify complex layer thickness variations and the depths of local supporting layers, allowing us to calculate the shortest optimal pile length without excess. This not only significantly reduces material and construction costs by eliminating unnecessary pile length but also ensures the required allowable bearing capacity for the structure. We provide a consistent response from survey proposals to structural calculations, offering optimal foundation solutions that achieve a high level of safety and cost-effectiveness.
basic information
This technical proposal presents a ground analysis system that highly integrates surrounding analysis using the neighboring ground database "GEODAS" and various in-situ sounding tests (automatic ram sounding tests, standard penetration tests, PH-type SS tests, etc.). By adopting compact and space-saving survey equipment, it flexibly accommodates urban narrow sites where access for large machinery is difficult due to narrow front roads and transport routes. It is equipped with automatic measurement functions for continuous impact data and rotational torque at different depths, enabling the precise calculation of the N-value of deep supporting layers, layer thickness, and penetration resistance values of intermediate layers.
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Applications/Examples of results
It is ideal for the foundation design practice of mid-rise steel buildings, mixed-use residential buildings, and apartment complexes built in densely populated urban areas and on narrow lots. It demonstrates its effectiveness in sites where adjacent buildings are extremely close, making it difficult to position large boring equipment, or in site conditions that require small transportation due to road conditions. It contributes to the decision-making of design offices and contractors who want to capture the slope of the bearing 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.
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