信江特大桥深基坑稳定性与排水量分析  

The Analysis of Deep Foundation Pits' Stability and Displacement of Super Large Bridge Over Xin River

作　　者：江金宜 李锦华[2] 陈水生[2] 

机构地区：[1]江西省上饶市公路管理局,江西上饶334000 [2]华东交通大学土木建筑学院,南昌330013

出　　处：《工程建设与设计》2011年第10期130-133,共4页Construction & Design for Engineering

基　　金：江西省自然科学基金项目(550012);江西省交通厅科技基金项目(2011000002)

摘　　要：滑坡灾害给国民经济建设带来了巨大的建筑工程损失,而正确地评价边坡的稳定性则是滑坡减灾成功的关键之一。文中首先详细地介绍了计算基坑边坡稳定性的条分法和基坑开挖排水量的计算方法;然后,采用这两种方法分别对信江特大桥两个桥墩承台深基坑进行了稳定性与排水量的计算分析。计算结果表明:在最不利水位时,两桥墩承台基坑边坡的稳定安全系数最小值均能满足规范要求,止水帷幕能够有效地减少基坑开挖的排水量。Landslide disaster to the development of national economy brought huge construction engineering loss, while the correct evaluation of slope stability is one of the keys to Iandslide disaster reduction. In this paper, firstly, the slice method and the approach provided by specification are introduced in detail to compute respectively slope stability and excavation displacement of deep foundation pit. Then, the slope stability and excavation displacement of two foundation pits of Super Large Bridge over Xin River are calculated and analyzed through the proposed methods. The results show that minimum stability safety factors of the two slopes can meet the requirement of specification in the most unfavorable water level, and waterproof curtain can efficiently reduce displacement of excavating foundation pits.

关 键 词：深基坑 稳定性 条分法 排水量 边坡 

分 类 号：TU311[建筑科学—结构工程] TU463