摘要
本文利用弹簧装置阐述了加固软黏土地基的真空预压方法的作用机理。在此基础上,比较了真空提水的极限深度和真空预压有效加固深度的不同,分析了真空预压有效加固深度大于真空提水极限深度的原因。通过设计模型直观地演示了真空预压的作用过程,并分析了沉降量、孔隙水压力等的变化,表明真空预压的有效加固深度与真空度大小无关,而与真空度的传递有关。最后通过工程实例证实真空预压的有效加固深度可以超过10m。
The mechanism of vacuum preloading method for reinforcement of soft soil is explained by using a spring system model, On this basis, the difference between the limited lift by vacuum pumping and the effective depth of vacuum preloading is analyzed and the reason of the latter may greater than the former is analyzed. A model is established for demonstrating the process of vacuum preloading. The analyses on variations of subsidence and pore water pressure indicate that the effective depth of vacuum preloading is independent of the magnitude of vacuum and related to the transmission of vacuum pressure only. A case study is presented to illustrate that the vacuum preloading method is effective for reinforcement of soft soil with thickness more than 10m.
出处
《水利学报》
EI
CSCD
北大核心
2007年第7期774-778,共5页
Journal of Hydraulic Engineering
关键词
真空预压
软基加固
固结
影响深度
孔隙水压力
vacuum preloading
reinforcement of soft soil
consolidation
effective depth
pore water pressure
