基于真空–堆载联合预压法的未打穿竖井地基固结分析

 在未打穿竖井情况下，用真空–堆载联合预压法来处理软土地基，既高效又经济。针对这种地基处理方法，应用Laplace 变换半解析法来进行分析。通过在竖井底面设置虚拟竖井来模拟竖井下三维渗流情况，并合理考虑真空度损失，得到真空度损失下竖井打入深度与沉降之间的关系。运用Laplace变换与逆变换，得到比较精确的解析解，并对影响竖井渗透作用的几个主要参数，如贯入度、井阻、真空度等进行对比分析，得到可供实际工程参考的竖井最优贯入度。

CONSOLIDATION OF PARTIALLY PENETRATED VERTICAL DRAIN WITH VACUUM-SURCHARGE PRELOADING

Using the Laplace Transform,this paper analyzed the partially penetrated vertical drain with vacuum preloading.A three-dimensional virtual vertical drain is assumed to reflect the real three-dimension seepage in the soil beneath the tip of the vertical drain;moreover,the vacuum loss along the drain is also taken into consideration in the model.The parameters influencing the consolidation are analyzed,such as well-resistance,vacuum loss,the penetrating ratio etc..Finally,the results are compared with the fie...