白秧坪隧道工程地质条件分析与评价
Analysis and Evaluation of Geological Conditions of Bai-yangping Tunnel Engineering
吴景龙1
作者信息
- 1. 中国建筑材料工业地质勘查中心陕西总队,陕西西安 710003
- 折叠
摘要
通过对白秧坪隧道隧址区地形地貌、地层岩性、地质构造、水文地质等进行地质调查,分析评价了隧道的岩土体工程地质特征、围岩分级及洞口稳定性,指出该隧道存在隐伏岩溶的可能性大,开挖揭露的溶洞易产生涌水、突泥和冒顶等危害,隧道开挖易诱发洞口垮塌,建议做好超前地质预报,设计应做好对各种岩溶灾害的工作预案,隧道洞口处施工时需采取超前支护,以利于成洞及仰坡稳定.
Abstract
Through geological investigation of the terrain,litholo-gy,geological structure,and hydrogeology of the Baiyangping Tun-nel site area,the engineering geological characteristics of the rock and soil,surrounding rock classification,and stability of the tunnel entrance were analyzed and evaluated.It was pointed out that there is a high possibility of hidden karst in the tunnel,and the karst caves exposed by excavation are prone to hazards such as water in-rush,mud inrush,and roof collapse.Tunnel excavation is prone to induce collapse of the entrance.Therefore,it is recommended to do a good job in advance geological forecasting,prepare work plans for various karst disasters,and adopt advanced support dur-ing construction at the tunnel entrance to facilitate tunnel forma-tion and slope stability.
关键词
隧道/工程地质/围岩分级/洞口稳定性Key words
tunnel/engineering geology/surrounding rock classifi-cation/hole stability引用本文复制引用
出版年
2024
NETL
NSTL
万方数据