反插法对混凝土灌注桩的承载力增强效果

On increasing effect of loading capacity of bored concrete piles with counter-insert method

反插法是在桩基础施工过程中总结出的一种方法,在桩施工过程中利用堆载试验测出桩的极限承载力大小,在测定桩的极限承载力大小时采用对比方法比较了反插法施工和正常施工后桩的极限承载力大小的区别,结果表明:用反插法施工的桩极限承载力要比没用反插法施工的桩极限承载力高,反插法在施工过程中用时短,操作简单,符合长螺旋混凝土灌注桩的施工要求。

The paper indicates the counter-insert method in one of the methods for the construction process of the pile foundation, adopts the heaped load test to test the ultimate loading capacity of the piles in the pile construction process, compares the ultimate loading capacities between the counter-insert method and the common construction by adopting the comparative method in testing the ultimate loading capacity of piles, and proves by the result that the ultimate loading capacity of the piles adopting the counter-inserted method is higher than the one without the method, so the counter-inserted method has short construction period and its simple operation adheres to the construction requirements for the long spiral bored concrete pile.