Site Investigation | Proposal to Optimize Pile Length for Steel Buildings on Narrow Sites with Delivery Restrictions
Ground investigation
Even in narrow areas where heavy machinery access is difficult, we utilize small sounding machines and nearby data comparisons. We identify the supporting layers of steel frame buildings and optimize them to the appropriate pile length.
In the construction of steel frame buildings on small plots in urban areas, situations often arise where large boring machines cannot be brought in due to the proximity of adjacent buildings and narrow front roads. To overcome such site constraints, Geotech provides advanced survey solutions that combine on-site measurements using compact and highly mobile small self-propelled survey machines with comparisons to surrounding ground databases. By employing methods such as automatic ram sounding tests, we can automatically acquire continuous impact and torque data up to a depth of 30 meters in a short time while occupying minimal space. By cross-referencing the obtained in-situ data with nearby boring column diagrams for correction analysis, it is possible to accurately identify the position and inclination of the bearing layer from limited survey points in a three-dimensional and multi-faceted manner. This eliminates uncertainties during the design phase and allows for the calculation of the shortest optimal pile length, trimmed of excessive overlength. It is a practical technology that enables load reduction at construction sites and significant cost savings in construction.
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basic information
This is a ground investigation technology centered around a self-propelled sounding machine and a fully automated data acquisition system designed for narrow sites. The machine dimensions are compact, with a total width of approximately 1 meter, allowing for self-propulsion, turning, and installation in narrow access routes and limited workspaces. It ensures penetration capability up to a depth of 30 meters through hammer strikes (mass of 63.5 kg, drop height of 500 mm) using an automatic drop device, and records the number of strikes and rotational torque as electronic data in real-time with a 200 mm pitch for automatic aggregation.
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Applications/Examples of results
It can be widely used in narrow stores, steel-frame pencil buildings, and new construction plans for densely populated apartment complexes in urban areas where the physical transportation of large survey machinery is difficult. In sites where multiple boring excavations cannot be conducted on the premises, it is used in conjunction with neighboring data to accurately identify the boundary lines of supporting layers. Additionally, it is very helpful in planning urban construction projects that require pre-determination of pile lengths, cost-cutting on unnecessary construction and material expenses, and measures against noise and vibration.
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