三峡翻坝公路秋千坪隧道塌方的岩体稳定性分析  

Stability Analysis of rock mass for Qiuqianping tunnel collapse at the Sanxia dam crossing of the Sanxia freeway

作　　者：李桂[1] 杨健辉[1] 魏加志 牛海成[1] 茹忠亮[1] 

机构地区：[1]河南理工大学土木工程学院,河南焦作454000 [2]中铁十一局一公司,武汉430072

出　　处：《河南理工大学学报（自然科学版）》2010年第2期239-244,共6页Journal of Henan Polytechnic University（Natural Science）

基　　金：国家自然科学基金资助项目(50804014);河南理工大学重点学科固体力学学科资助项目(509902);河南理工大学博士基金资助项目(6482-24)

摘　　要：由于地质构造作用以及风化作用,在隧道施工中经常会遇到局部围岩较差的地段,这也是工程事故的多发地段.2009年2月,三峡翻坝公路秋千坪隧道在施工以及塌方的处理过程中,先后产生过2次大面积的塌方.针对塌方的地质构造及实际塌方情况,对已经产生失稳的岩体进行了稳定性分析,其结论是地下水以及施工工艺不当,是造成2次连续塌方的主要原因,并根据这些原因给出了类似工程的事前预防处理方法.Variations in structural strength and stability caused by inherent in geology of the area,weathering and erosion are often encountered during the process of tunnel construction;and weaker sections are where engineering failures most frequently occur.In February 2009,two big area tunnel collapse sections occurred during the construction of the Qiuqianping tunnel at the Sanxia Dam crossing of Sanxia Freeway.Aimmed at the geological structure and conditions of practical collapse,the stabilization of the collapse rock mass had been analyzed,it shows that the main causes of the twice collapses are ground water and inadequate engineering measures,which can be recommended preventative measures to deal with these issues in similar engineering situations.

关 键 词：公路隧道 塌方 岩体 稳定性分析 

分 类 号：U457.2[建筑科学—桥梁与隧道工程]