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[Abstract]:Due to the engineering quality problem that the bearing capacity of the end-bearing pile (rock-socketed pile) does not meet the design requirements due to the lack of strict construction quality control, this paper puts forward a simple and feasible method for strengthening the pile end by high-pressure grouting in the center of the pile. The pile with the thickness of sediment more than 5 cm at the end of the pile is directly strengthened by high pressure grouting, and the pile that does not enter the medium weathered rock is strengthened not only by the high pressure grouting but also by the new stiffened micro pile. Different calculation methods of bearing capacity are put forward for the pile with or without the middle weathered rock.
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