岩溶地区隧道工程地质选线适宜性评价

Evaluation of Rationality of Tunnel Engineering Geological Line Selection in Karst Area

岩溶地区地质条件极为复杂,在岩溶区进行隧道建设时,由于线路选取不当,常发生涌突水(泥)、涌砂、地表塌陷等岩溶地质灾害,严重威胁隧道施工和运营期的安全。以影响隧道选线的各种地质因素作为定性评价指标,采用权重系数法,通过定性指标定量化来对岩溶区隧道线路选取的合理性进行分析评价,基于此提出线路选取优化措施。同时,以滇中引水工程白虎山隧道地质选线为工程实例,对研究区线路选取的适宜性进行定量评价,并提出优化措施,实践证明,采用权重系数法分析评价结果与隧道施工实际基本相符。

The geological conditional of the Karst region is extremely complicated. In the constructing process,the Karst geological disasters often occur such as the water bursting and mud surging,sand bursting and surface collapse. These disasters will seriously threaten the safety during the tunnel's construction and operation period. In this paper,the various geological factors which affect the location of tunnel route selection act are selected as the qualitative evaluation index. In this paper,we evaluate the rationality of the tunnel route selection in Karst Region and propose the route selection optimization measures. Baihushan tunnel of Yunnan diversion project is analyzed as an example. It proves that the evaluation results and the measures mostly comply with the actual tunnel construction.