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采用室内模型试验方法,通过在软土中静力压入无孔管桩和6种不同布孔方式的有孔管桩,分别对其沉桩时引起的超孔隙水压力进行了监测和分析,获得了各种管桩静压沉桩时超孔隙水压力随深度、径向距离和开孔的分布位置变化的规律。通过对比分析,得出按照星状布孔的方式在桩壁开孔是桩壁开孔位置的最优分布方式,有利于减小沉桩挤土效应,对促进有孔管桩技术工程应用有一定的指导价值。
The indoor model test method was used to monitor and analyze the excess pore water pressure induced by pile driving by pressing the non-perforated pipe pile and six different perforated pipe piles in the soft soil. Obtained a variety of pipe pile static pressure pile driving excess pore water pressure with the depth, radial distance and open hole distribution of the law. Through the comparative analysis, it is concluded that the opening of the pile wall is the optimal distribution of pile wall openings according to the way of star-shaped holes, which is helpful to reduce the pile squeezing effect. Certain guidance value.