真空-堆载联合预压法应用试验研究  

Laboratory research of vacuum combined surcharge preloading means

作　　者：彭劼[1] 施麟丽 陆玉琳[1] 

机构地区：[1]河海大学岩土工程研究所,南京210098 [2]上海市地矿建设责任有限公司,上海200072

出　　处：《上海地质》2005年第4期34-37,共4页

基　　金：国家自然科学基金资助项目(50379010)

摘　　要：对杭金衢高速公路真空-堆载联合预压工程,进行了现场试验和资料分析研究。研究表明真空预压能使地基产生较大的沉降速率,同时产生向内的水平位移,从而使真空-堆载联合预压比超载预压具有更强的抗失稳能力,侧向位移量和位移速率与荷载大小有明显的相关性。真空预压的加固深度主要是竖向排水体范围内,而真空-堆载联合预压法的加固深度则可根据堆载的附加应力比来确定。Field experiment was researched in the engineering of Hang Jin Qu highway, the result shows that vacuum preloading made the more settlement velocity, and more horizontal displacement into the foundation, the vacuum combined preloading improved foundation is stable than improved by surcharge preloading. The effective depth of improveing is in the scape of PVD, and the effective depth of vacuum combined surchagr preloading is decided by stress of surcharge.

关 键 词：真空-堆载联合预压 现场试验 加固 

分 类 号：TU472.31[建筑科学—结构工程] U416.1[建筑科学—土工工程]