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本文基于比奥固结理论,将桩土界面看作透水边界,建立了饱和粘土中采用排水管桩静压沉桩后单桩桩周土体固结的空间轴对称定解条件,给出了相应的超静孔隙水压力和固结度的级数解答,根据本文的级数解答编制计算程序,并对一算例进行了对比分析。分析结果表明:相比于普通桩,由于将桩土界面看作透水边界,采用排水管桩可以更有效地加快沉桩引起的超静孔隙水压力消散,从而达到降低沉桩引起的负面影响,加快单桩承载力的发挥和缩短工期等目的。本文的研究成果为排水管桩的工程应用提供了有效的理论依据。
Based on the Biot consolidation theory, the pile-soil interface is regarded as the water-permeable boundary, and the space axisymmetric solution conditions of the soil consolidation around the single-pile pile in the saturated clay are established. Corresponding excess pore water pressure and degree of consolidation of the series solution, according to the series of series of answers to the preparation of the calculation program, and an example of a comparative analysis. The analysis results show that compared with ordinary piles, the pile-soil interface is regarded as the water-permeable boundary. Using the drainage pipe piles can effectively speed up the dissipation of excess pore water pressure caused by pile driving so as to reduce the negative impact caused by pile driving. Speed up the single pile bearing capacity to play and shorten the construction period purposes. The research results of this paper provide an effective theoretical basis for the engineering application of drainage pipe piles.