双层竖井地基半透水边界固结分析

在现有双层竖井地基固结理论基础上，对双面半透水边界下的固结问题进行了研究，给出了相应的固结解答。将该解答编制成应用程序，对一算例进行了参数分析，以了解双层竖井地基半透水边界的固结特性。算例分析表明，半透水边界对竖井地基的固结影响较大：半透水参数(Rt，Rb)越大，则整个系统的孔压消散越快；半透水参数对与其相邻的土层的固结影响要比远离其边界的土层的固结影响大得多；按变形定义和按孔压定义的平均固结度两者的差别受半透水边界参数的影响。

Consolidation analysis of double-layered ground with impeded boundaries using vertical drains for soil improvement

The consolidation problem of double-layered ground with impeded boundaries using vertical drains for soil improvement is studied based on the existing consolidation theory of double-layered ground with vertical drains. The corresponding solutions are presented and it is coded into a program. An engineering case is analyzed using the program and parametric studies are conducted to study the consolidation characteristics of the double-layered ground with impeded boundaries improved by vertical drains. The results lead to the following conclusions: The greater the values of impeded parameters (Rt and Rb) are, the faster the pore pressure of the system dissipate. Impeded parameters have greater influence on the stratum close to the impeded boundaries than that stratum far away from the impeded boundaries. The difference between the average consolidation defined by pore pressure and that defined by settlement is influenced by impeded parameters.