岩溶长隧道设计、施工方案的论证及实施

研究目的岩溶长隧道对地下水的整治仍延用排放为主的传统模式,因此造成隧道周边生态环境破坏、地质灾害产生、可持续发展受到严重影响。为扭转人们认识上的误区,以达到观念的转变。研究方法本文试图论证在岩溶和地下水同等发育条件下,技术可行、经济指标、施工工期等方面的比较,用数据说话。研究结果围绕保护环境,坚持以预防为主的方针,提出应采用全封闭方案施工的地区,具体的措施、施工方法及注意问题,岩溶地区长隧道地下水防排应遵循的原则和初步标准及超前预注浆的方法。研究结论地质复杂的岩溶长隧道当地质灾害威胁施工安全和运营安全,地质环境恶化影响地区可持续发展的时候,隧道应坚持全封闭的原则,只要方案正确,措施得当,就会施工顺利,且工程不留后患。

DEMONSTRATION AND ENFORCEMENT OF DESIGN AND CONSTRUCTION SCHEMES FOR LONG TUNNEL IN KARST ZONE

Research purposes:The traditional way is still adopted for treating underground water to long tunnel in karst zone.Therefore,it causes ecological environment surrounding tunnel damaged,occurrence of geological disaster and serious influence on sustainable development.This paper is written for elimination people's misunderstanding and changing concepts. Research methods:The demonstration is made in this paper of comparison in aspects of technical feasibility,economic index and construction schedule under the same development condition of karst and underground water with taking data as basis. Research results:The principle of "Take prevention as the dominant factor"should be kept for environmental protection.The concrete measures,construction method and caution for construction are put forward for the area for which a fully closed scheme should be adopted.The principle,primary standard and method of advanced pre-grouting are present for prevention water and drainage to long tunnel in karst zone. Research conclusions:The principle of full closure should be kept to long tunnel in karst zone with complex geology when geological disaster threatens the safety of construction and operation,and the worse of geological environment influences sustainable development of the area.If the scheme is correct and measures are suitable,construction will keep going on smoothly without trouble in further.