夹砂层软土地基电渗联合真空预压设计

Electroosmosis Combined with Vacuum Preloading Design for Soft Soil Foundation with Sand Interlayer

摘要:

电渗联合真空预压处理软基设计方法尚不够系统和全面，限制了该技术在工程中的应用。针对夹砂层软土地基电渗联合真空预压处理设计，提出了可压缩排水电极设计方法，电源与供电线路设计方法，真空封闭及排水系统设计方法和工期与沉降预测方法，给出了具体的夹砂层地基场地电阻的计算公式和有限元法模拟时电压换算超孔压的计算公式，研究成果为夹砂层软土地基电渗联合真空预压工程设计提供了成套设计方法。

Abstract:

The design method of electroosmosis combined with vacuum preloading to treat soft soil foundation is still not systematic and comprehensive enough, which limits the application of this technology in engineering. For the design of electroosmosis combined with vacuum preloading treatment for the sand-interlayered soft soil foundation, the design method of compressible drainage electrode, the design method of power source and power supply circuit, the design method of vacuum sealed and drainage system, and the prediction method of construction period and settlement are proposed. The specific calculation formula of ground resistance of sand-interlayered foundation and the calculation formula of excess pore pressure for voltage conversion in finite element simulation are given. The study result provides a complete set of design method for the electroosmosis combined with vacuum preloading design for soft soil foundation with sand interlayer.