考虑应变软化的单桩桩周土固结解

基于一维固结理论,假定桩壁为不透水边界,引入了考虑应变软化和桩径大小影响的超静孔隙水压力的解析解作为初始条件,并考虑了弹性区超静孔隙水压力对桩周土固结的影响,采用数学物理方法推导出桩周土的固结解。理论计算值和现场孔压监测成果吻合较好,表明该解析解对预测沉桩后桩周土中孔压消散过程具有一定实用价值。

Analytical Solution for Soil Consolidation Around Single-Pile after Pile Driving Considering Strain Softening

The solution of soil consolidation around piles in saturated soft clay was deducted in this paper via methods of mathematical physics based on Terzaghi’s one-dimensional consolidation theory.The pile wall was assumed as impermeable boundary,and the analytical solution of excess pore water pressure in which the effects of strain softening and pile diameter are considered was taken as the initial condition.In addition,the effect of excess pore water pressure in elastic region on the consolidation of soils around piles was also taken into account.The calculated results agree well with the in-situ pore pressure measurements.The solution in this paper is of practical value for the prediction of excess pore water pressure dissipation in saturated soft soils around the driven piles.