Method for improving bearing capacity of pile foundation under construction by replacing and filling soil between piles
A technology of soil between piles and pile foundations, which is applied in foundation structure engineering, foundation structure tests, construction, etc., can solve the problems of difficulty in achieving the purpose, high cost, and long construction period of the method of filling piles, and achieve the elimination of mechanical defects and low cost. The effect of low cost and short construction period
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[0014] The present invention will be further described below in conjunction with specific embodiments:
[0015] A method for improving the bearing capacity of the pile foundation under construction by replacing the soil between the piles, including the following steps:
[0016] Step 1: Excavate all the soil between the piles to the calculated depth, which is 1.0m~3.0m; in actual application, according to the site conditions and test pile data, the replacement material is selected and the soil replacement depth between the piles is calculated;
[0017] Step 2. When the excavation surface is above the groundwater level, use 2:8 lime soil or 3:7 lime soil to fill in layers with a compaction coefficient of λ c ≥0.95; When the excavation surface is below the groundwater level, use sand and gravel materials to ram and fill in layers, and the compaction coefficient should be λc≥0.97. For pile foundations, the rammed soil between piles and the bottom surface of the cap are at the same elevat...
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