EFFECT ANALYSIS OF SOFT FOUNDATION TREATMENT BY VACUUM PRELOADING
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摘要: 采用真空预压法处理某高速公路软基,处理淤泥层的平均厚度达到10m以上,软基上施加真空压力80kPa,150d后地基表面沉降量达到1m以上,地基平均固结度超过90%,满足设计要求。处理后的软土地基物理力学性质变化明显,表明采用真空预压法处理本工程软基是可行的,同时对真空预压引起的土体水平位移进行分析。Abstract: The vacuum preloading method is used in highway to treat the soft foundation. The average thickness of the siltlayer is about 10m. The vacuum pressure of 80kPa is applied for 150 days to treat the soft clay layer. The settlement is about1. 0m and the average degree of consolidation is over 90%. The physicomechanical propertiesof the soil change greatly aftertreatment, which proves the effect of vacuum preloading in this project.Meanwhile, the horizonal displacement problemcaused by vacuum preloading is also discussed.
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Key words:
- vacuum preloading /
- settlment /
- displacement /
- pore water pressu soil pressure /
- horizontal displacement
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.陈 环. 真空预压法机理研究十年. 港口工程,1991 (4): 1-5 .《地基处理手册》编写委员会. 地基处理手册. 北京: 中国建筑工业出版社, 1988 .龚晓南, 岑仰润. 真空预压加固软土地基机理探讨. 哈尔滨建筑大学学报, 2005(3): 10-14 .叶柏荣. 综述真空预压法在我国的发展. 地基处理, 2000 (3): 49-57
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