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文章通过某试验段CFG单桩及群桩施工过程中桩周软土孔隙水压力的监测,分析了单桩和群桩施工引起的超静孔隙水压力累积及消散过程,对比了两者的一些相同点及不同点。分析认为,群桩施工过程产生的超静孔隙水压力不是各单桩对桩周软土影响的简单叠加,而是各单桩施工综合影响的结果,期间伴随着超静孔压的不断累积和不断消散,群桩超静孔压的这种反复累积消散的叠加效应将对桩周淤泥质软土产生很大的扰动。
In this paper, through the monitoring of the pore water pressure of the soft surrounding soil around the piles in the test section of CFG pile and group pile, the accumulation and dissipation of excess pore water pressure caused by the construction of single pile and group pile are analyzed. The same point and different point. The analysis shows that the excess pore water pressure generated by the pile group construction process is not a simple superposition of the influence of each single pile on the soft soil around the pile, but the result of comprehensive effect of each single pile construction. During this period, The continuous dissipative effect of superposition and dissipation of pile group excess pore pressure will cause great disturbance to silt soft soil around the pile.