摘要
结合上海市西藏南路越江隧道浦东接线段基坑工程,对某工况下坑中坑基坑建立二维数值模型。通过调整外坑围护桩插入比,分析各围护桩的侧向位移变化规律,探讨此工况下基坑开挖的力学行为,结合对基坑安全性和经济性的综合考虑,从而得出外坑围护桩较合理的插入比为2∶1～3∶1。
Based on the excavation of Shanghai Pudong wiring segment of the South Xizang Road cross-river tunnel,the two-dimensional numerical model of a pit in foundation pit was established with respect to a certain condition.By adjusting the insertion ratio of the outside excavation retention piles,the variation of the lateral displacement of the retention piles was analyzed and the mechanical behavior of the excavation in this condition was investigated.With comprehensive consideration of both safety and economical efficiency,the insertion ratio of the outside excavation retention pile was recommended to be 2∶1 to 3∶1.
出处
《施工技术》
CAS
北大核心
2013年第1期44-46,共3页
Construction Technology
关键词
地下工程
隧道
基坑
围护桩
插入比
侧向位移
underground
tunnels
foundation excavation
retaining pile
insertion ratio
displacement
