A Determination Method of Borehole Shrinkage Level and Influencing Factors in Soft Soil Layer
A technology of influencing factors and measurement methods, which is applied in the direction of earthwork drilling, measurement, and measurement devices, can solve the problems of large errors between quantitative indicators and actual conditions, the inability to obtain analysis methods, and the impact on the treatment of hole wall shrinkage of bored piles.
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[0053] In order to clearly illustrate the implementation of the present invention, the following takes a heavy oil processing project cast-in-place pile project as an example to analyze and evaluate the problem of hole wall shrinkage of bored cast-in-place piles in this area.
[0054] All important devices and pipe galleries in the project area are based on pile foundations, and there are about 2,000 cast-in-place piles. However, due to the special geological conditions of the foundation in the project area and groundwater dynamics, relatively large borehole wall deformation often occurs during the construction of bored piles, and serious diameter shrinkage often occurs. The measured values of 10 boreholes in the triple joint were selected for analysis and research.
[0055] Step 1: Drilling hole wall shrinkage test and determination of drilling geometric elements
[0056] Use the JJC-1D aperture detection system to detect the diameter of the experimental borehole along the...
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