Discussion of the Mechanism of Vacuum Preloading and Settlement Calculation Based on Measured Values of Pore Water Pressure
详细信息
- 责任者：Lei Ming (Civil Engineering College ; Central South University ; Changsha 410075 ; China) ; Wang Xinhua
- 刊名：Hydrogeology and Engineering Geology
- 出版年：2010
- 卷期：37(6)
- 关键词：真空预压法 ; vacuum preloading methods ; 地基加固 ; foundation stabilization
- 页码：p.81-85,90
- 图表：3 illus., 2 tables, 10 refs.
- 分类号：1702
- issnNo：ISSN1000-3665
- isbnNo：CN11-2202/P
摘要
Measured values of pore water pressure in soil under vacuum preloading were analyzed. Action process of vacuum preloading was compartmentalized three phases. They were seepage consolidation in the upper part of the soil and "surcharge load" effect in deep soil by vacuum suction, consolidation stabilization in the upper part of the soil and transformation of "surcharge load" effect to "negative pressure" effect in deep soil, seepage consolidation in deep soil under"negative pressure"effect and to balance. Action mechanism root of vacuum preloading was not negative pressure difference solely,which was produced by seepage field.The root was "positive pressure" action and "negative pressure" action together during different period. Settlement calculation method was obtained and applied to calculating soil settlement.