上海地质
上海地質
상해지질
2005年
4期
34~37
,共null页
真空-堆载联合预压 现场试验 加固
真空-堆載聯閤預壓 現場試驗 加固
진공-퇴재연합예압 현장시험 가고
vacuum combined surcharge preloading,field experiment, foundation improvement
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.
對杭金衢高速公路真空-堆載聯閤預壓工程,進行瞭現場試驗和資料分析研究.研究錶明真空預壓能使地基產生較大的沉降速率,同時產生嚮內的水平位移,從而使真空-堆載聯閤預壓比超載預壓具有更彊的抗失穩能力,側嚮位移量和位移速率與荷載大小有明顯的相關性.真空預壓的加固深度主要是豎嚮排水體範圍內,而真空-堆載聯閤預壓法的加固深度則可根據堆載的附加應力比來確定.
대항금구고속공로진공-퇴재연합예압공정,진행료현장시험화자료분석연구.연구표명진공예압능사지기산생교대적침강속솔,동시산생향내적수평위이,종이사진공-퇴재연합예압비초재예압구유경강적항실은능력,측향위이량화위이속솔여하재대소유명현적상관성.진공예압적가고심도주요시수향배수체범위내,이진공-퇴재연합예압법적가고심도칙가근거퇴재적부가응력비래학정.
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.
