高速铁路隧道穿越大型溶洞勘察及工程整治技术

Investigation and Engineering Renovation Technology of High-speed Railway Tunnel Crossing Large Karst Cave

郑万高速铁路是国家“八纵八横”快速客运通道的重要组成部分,沿线地形地质极其复杂,隧道通过岩溶发育地段长,岩溶及岩溶水对工程影响大。湖北段荣家湾隧道工程勘察设计、岩溶补充勘察及整治过程中,采取测绘、测量、钻探、物探、试验等手段,充分利用各阶段勘察成果,深入分析隧道岩溶、岩溶水发育特征,综合开展溶洞大厅稳定性的影响评价,是隧道工程设计及岩溶整治的地质基础保障。研究成果可为复杂岩溶地区隧道岩溶勘察及相关设计提供工程借鉴和参考。

Zhengzhou-Wanzhou High-speed Railway is an important part of the national fast passenger corridor“Eight North-South and Eight East-West Corridors”.The topographical and geological conditions along the line are extremely complex,and the tunnels pass through long karst-developed areas,thus karst and karst water has a great impact on the project.During the investigation,design,supplementary karst investigation,and treatment process of the Rongjiawan Tunnel Project in Hubei Province,various methods such as mapping,surveying,drilling,geophysical prospecting,and testing were employed.The results of each investigation stage were fully utilized to analyze the characteristics of tunnel karst and karst water development in depth.A comprehensive impact assessment on the stability of karst cave halls was also carried out.This ensures that the geological foundation is secure for both tunnel engineering design and karst treatment.The results can provide engineering references for karst investigation and relevant design of tunnels in complex karst areas.