研究目的：目前我国岩溶长隧道的现行设计和施工仍遵循固有的“以排为主”的原则，由于岩溶地层的独有特征，不仅在施工及运营过程中隧道出现严重地质灾害，同时水资源、土地资源遭受破坏，生态环境、地质环境日趋恶化，直接影响隧道范围的可持续发展。本文意在修建岩溶长隧道时对其环境地质问题引起足够的重视，扭转岩溶地区长隧道设计和施工观念，使设计、施工更符合当前基本国策，坚持可持续发展战略。
研究方法：通过分析现行设计原则对水资源、土地资源的影响，论证了地质灾害形成和环境恶化与其的直接关系。
研究结论：提出在关键地段采用全封闭的设计方案。即在隧道地质灾害未出现之前，和超前地质探测结合，对前方地质复杂的突水涌泥地段进行预加固措施，以保证铁路交通繁荣的同时，环境地质不会恶化。
Research purpose: Nowadays the principle of "Take drainage as the dominant factor" is still followed in design and construction of long tunnel in karst zone. It not only causes serious geological disaster occurring in construction and service of tunnel, but also causes water and land resources damaged and environments of ecology and geology worsened, even directly influences the sustainable development of tunnel because of unique characteristics of karst strata. This paper is written for causing attention to the problem of environmental geology while constructing long tunnel in karst zone, changing design and construction concepts of design and construction of long tunnel in karst zone in order to make design and construction conforming to the basic policy of state and keeping the strategy of sustainable development.
Research method: The formation of geological disaster and its direct relation with environment worsening are demonstrated through analysis of the influences on water and land resources by existing design principle.
Research conclusion: It is proposed that the fully closed design scheme should be adopted for key area, namely in combination with advanced geological survey, the pre-reinforcement should be conducted to the ahead burst mud area with complex geology before geological disaster of tunnel occurs in order to make no worse of environmental geology.
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