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EXPERIMENTAL STUDY ON MECHANISM OF REINFORCING SOFT FOUNDATION OF BRIDGE HEAD BY VACUUM COMBINED WITH SURCHARGE PRELOADING
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摘要: 通过对浃里陈大桥桥头试验段的真空度、地下水位、流量、孔隙水压力、地表沉降等现场监测结果的分析；阐述了真空堆载联合预压的联合机理，真空预压与堆载预压的联合方式不是真空荷载与堆载荷载的叠加，而是真空预压引起的孔压差与堆载压力引起的孔压差的叠加。试验结果表明，用真空堆载联合预压法处理软基是极为有效的。Abstract: The observation results of the bridge head experimental site of Jialichen Bridge are analyzed such as vacuum degree, ground water table, flowrate, pore water pressure and surface settlement.The combined mechanism of vacuum combined with surcharge preloading is discussed.It is not the way of the vacuum loading combined with surcharge loading but the the way of pore water pressure difference caused by vacuum preloading combined with the the pore water pressure difference caused by surcharge loading.The testing results show that soft foundation treated by vacuum combined with surcharge preloading is very effective.
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Key words:
- vacuum degree /
- pore water pressure /
- ground water table /
- pore water pressure difference
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[2] 彭吉力,刘汉龙,等.真空-堆载联合预压法软基加固对周围环境的影响.岩土工程学报,2002,24(5):656～659 娄炎.真空排水预压法加固软土技术.北京:人民交通出版社.2002 [3] 徐泽中,刘世同,柴玉卿.真空堆载联合预压法的渗流分析.河海大学学报,2002,30(3):85～88 [4] 李豪,高玉峰,等.真空-堆载联合预压加固软基简化计算方法.岩土工程学报,2003,25(1):58～62 [5] 李就好.真空-堆载联合预压法在软基加固中的应用.岩土力学,2003,20(4):58～62 [6] 娄炎.负压条件下软土地基中的孔隙水压力.水利学报,1988(9) -
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