黔张常铁路大堡梁隧道岩溶发育规律及控制因素分析

Analysis of Karst Development Regularities and Control Factors of Dabaoliang Tunnel in Qianjiang-Zhangjiajie-Changde Railway

研究目的:岩溶是南方可溶岩地区铁路工程遇到的最大不良地质问题,因此对其工程地质条件的研究成为地质勘察工作的重点内容。本文以黔张常铁路大堡梁隧道为例,通过综合勘察手段分析研究隧区内的岩溶发育规律及控制因素,为岩溶地区地质勘察工作提供参考依据。研究结论:通过对大堡梁隧道区内岩溶发育规律及控制因素的研究和分析,得出:(1)确定区内4条较大规模岩溶管道裂隙流的位置,为隧道设计工作提供重要参考;(2)岩溶地区地质调查宜采用综合工程地质勘察手段,结合航片解译、地面调查、洞内调查、物探等多种方法才能进一步的揭示岩溶发育规律,达到勘察目的;(3)本文对以后岩溶地区地质勘察工作具有一定的参考价值。

Research purposes： Karst is the most serious unfavorable geology problems about the railway project in the southern karst area, therefore the research of the engineering geological conditions become the main content of geological survey work. This article takes Dabaoliang tunnel in Qianjiang - Zhangjiajie - Changde Railway as an example, analyzes and researches the karst development regularities and control factors by the comprehensive survey methods, and provide a reference for karst region geological survey in the future. Research conclusions： This article get the following conclusions according to the research and analysis of karst development regularities and control factors of Dabaoliang tunnel ： （ 1 ） Confirming the position of four more large - scale karst conduit and fracture flow system in the area, which provide the reference for tunnel design work; （2） It should adopt the comprehensive engineering geological exploration methods, combining the interpretation of aerial photoes, ground survey, hole survey, geophysical exploration and other methods, to further reveal the karst development regularities and achieve investigation purpose; （3） This geological survey in karst area. article provide the certain reference value for the future