摘要
本文运用RFPA系统的强度折减版以清水大桥5号断面为背景对桥墩底部溶洞区对其上部围岩稳定性的影响进行了数值分析研究。研究结果表明:岩:容对其上层围岩的影响范围随着深度的增大而变大;破坏效应带主要是在垂直于自由面的溶洞两侧;对多溶洞而言,应力主要集中在两溶洞破坏效应带之间的区域,并且主要在此发生破坏,而在其内部效应带之间则比较稳定。
Karst caves is a important problem for the construction. This paper makes the research on numerical analysis of influence of Karst caves under the pier on stability of its surrounding rock mass by using the RFPA software and yet analyses the instance of No. 5 plane of Qingshui Bridge. The following results has been given. The influenced area the caves made is relative to its depth, the deeper the depth is, the larger the area is. The destroying domino effect area is mainly concentrated on the area beside the plane which is vertical to the free plane. If there are some caves, the stress is concentrated on the destroying domino effect area between two caves, and destroy occurs mainly there.
出处
《地球与环境》
CAS
CSCD
北大核心
2005年第B10期309-313,共5页
Earth and Environment
基金
国家自然科学基金(50204003
50174013)西部交通建设科技项目(岩溶地区公路工程地质勘察与综合评价技术研究)
关键词
岩溶
稳定性
地表沉降
数值分析
Karst caves
Stability
Surface Subsidence
Numerical analysis
