长大隧道的溶洞处理施工技术

Construction Technology of Karst Cave Treatment in Long Tunnel

近几年,在国家政策的倾斜和财政支持下,中西部交通基础设施建设迅猛发展,特别是高速公路、铁路建设突飞猛进,日新月异,而我国喀斯特地貌分布广泛,类型众多,铁路建设过程中,面临极为复杂的溶洞地质问题,尤其是山区铁路普遍桥隧占比在50%以上,长大隧道层出不穷,且呈现岩溶、岩溶水极度发育、岩溶类型多等特点。本文主要分析了隧道岩溶发育类型、岩溶隧道超前地质预报措施,并结合张吉怀高速铁路永顺隧道溶洞处理工程实例,进行了隧道的溶洞处理施工技术研究,为类似工程溶洞处理提供参考。

In recent years,with the tilt of national policies and financial support,the construction of transportation infrastructure in central and Western China has developed rapidly,especially the construction of highways and railways.However,Karst landform in China is widely distributed and has many types.In the process of railway construction,it is faced with extremely complex geological problems of karst caves,especially in mountainous areas,Bridges and tunnels account for more than 50%of railway construction,and long tunnels emerge in an unbroken stream,showing characteristics of karst,karst water extremely developed,and karst types.This paper mainly analyzes the karst development types of the tunnel and the advanced geological prediction measures of the karst tunnel.Combined with the example of the karst tunnel treatment project of Yongshun tunnel of Zhang Jihuai Highspeed Railway,this paper studies the karst tunnel treatment construction technology of the tunnel,so as to provide reference for the karst tunnel treatment of similar projects.