1.Department of Civil Engineering South China University of Technology Guangzhou 510640 China 2.Guangzhou Sihang Institute of Engineering Technology Guangzhou 510230 China
Abstract：Based on the application of gridiron cement-mixed piles and sand piles to protection of high-voltage cable channel in soft ground improved with vacuum preloading technique,protection project was analyzed.Some contrast were performed on protected and non-protected sections by vacuum preloading to observe surface deformation,deep lateral displacement and pore water pressure in stratum.It was shown that the protection project was effective and the high-voltage cable channel was safe.Variation of pore pressure water demonstrated that there was seepage through gridiron cement-mixed piles in deep soil.The change in effective stresses resulted from falling of pore water pressure and ground water seepage was the main factor inducing deformation of soft ground by vacuum preloading.
邱青长；莫海鸿；董志良；张峰；. 水泥搅拌桩和砂桩在真空预压防护工程中应用与分析[J]. 岩土工程学报, 2007, 29(1): 143-146.
QIU Qingchang 1, MO Haihong 1, DONG Zhiliang 2, ZHANG Feng 2. Analysis and application of cement-mixed piles and sand piles to protection projects of soft ground improved by vacuum preloading. Chinese J. Geot. Eng., 2007, 29(1): 143-146.
