真空-堆载联合预压加固高速公路软基探讨

Discussion on Strengthening of Expressway Soft Foundation by Vacuum-Heaped Load Combining Precompression

系统地总结了真空-堆载联合预压加固软土地基的特点;在此基础上结合某实验段,对真空预压加固轨基过程的分层沉降、孔隙水压力、表面沉降和水平位移等随真空度和时间的变化进行详尽而深入的分析,对该方法加固软土路基的效果进行有益的探讨;总结该实验段真空-堆载联合预压的加载过程及卸真空计划,提出科学而实用的真空卸载标准。

In a systemic way, this paper presents the characteristics of the Vacuum-Heaped Load Combining Precompression for strengthening soft ground; and the field test data analysis of an experiment section with soft foundation improved with the method.The variations of layered settlement, pore pressure, surface settlement and lateral displacement with Vacuum degree and time are given to analyze the strengthening effects.The process of Vacuum loading and unloading is summarized, with reliable and practical standard of Vacuum unload given, based on the analysis and validation of the actual example.