遂渝铁路荆竹岭隧道复杂地质段设计

研究目的：消除荆竹岭隧道发生岩溶突水引起施工灾害事故发生可能,避免过可溶岩段地下水大量漏失破坏水环境引起地表塌陷,解决隧道过巨大溶洞群、地下暗河、岩溶突泥段及石膏层膨胀腐蚀性对隧道结构强度、稳定、耐久性的影响问题。研究方法：本着治水、环保、安全、运营救援相结合的理念,系统设置辅助坑道、特殊地质段加强超前地质预报、富水地段帷幕注浆堵水与岩溶暗河疏导排水相结合,并运用ANASYS程序数值仿真计算。研究结果：完成隧道跨越“溶洞、暗河、突泥段”设计、石膏地层段支护结构设计、抗水压衬砌设计。研究结论：本隧富水段、岩溶暗河段的防排水设计理念及复杂地质段设计措施,确保了隧道结构的施工、运营安全,可很好地指导今后类似复杂地质段工程设计。

DESIGN MADE FOR COMPLEX GEOLOGICAL SECTION OF JINGZHULING TUNNEL ON SUINING-CHONGQING RAILWAY LINE

Research purposes: The design is made for eliminating the possibility of happening construction accident arisen by karst burst water in Jingzhuling Tunnel, avoiding subsidence arisen by damaged water environment due to large leak and loss of ground water while the tunnel crossing the karst section and solving the problems of influences on the strength, stability and durability of tunnel structure by the tunnel crossing huge karst caves group, underground river and karst burst mud section as well as expansion corrosivity of gypsic horizon. Research methods: Based on the integrated concept of water conservancy, environment protection, safety and running relief, the system is equipped with auxiliary pit, the advanced geological prediction is done further to the special section, blocking water by grout curtain is done in combination with dredging underground river of karst cave to the rich water section and the similar calculation is made by adopting numerical values of ANASYS program. Research results: The design of the tunnel crossing karst cave, underground river and burst mud section, design of supporting structure to gypsic horizon and design of lining against water pressure are completed. Research conclusions: The construction of the tunnel structure and running safety are ensured by the design concept of water conservancy and drainage to the rich water and underground river of karst cave sections, and design measures for the complex geological section, for reference to the design of similar project in complex geological section.