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螺旋钻孔灌注桩施工时桩底端常有虚土存在,从而桩端承载力不能正常的发挥.辽宁省建筑科学研究所采用低压注浆法解决了这个难题,其工艺是在成孔后,直接对孔底虚土喷注水泥浆.这将在桩底端处形成树根桩.随之就消除了桩端虚土对桩承载力的不良影响,提高了原土层的承载力.他们通过实际
Due to the existence of virtual soil at the bottom of the pile during the construction of spiral bored piles, the bearing capacity of the pile end can not be properly exerted. The low pressure grouting method was used to solve this problem in the Liaoning Institute of Building Science, and the process was after the hole was formed. Direct injection of cement slurry on the bottom of the hole. This will form root piles at the bottom end of the pile. This will eliminate the adverse effect of the virtual soil on the bearing capacity of the pile and increase the bearing capacity of the original soil. actual