贵广线天平山隧道软岩变形分析

Analysis of Soft Rock Deformation of Tianpingshan Tunnel of Guiyang-Guangzhou Railway

研究目的:软岩变形预测及监测是铁路工程地质中一项复杂而又重要的工作,寻求一种有效的预测及监测方法具有重要的意义。研究结论:针对天平山隧道的软岩变形问题,勘察阶段已经有了较为充分的认识,并为此开展了综合勘探,从岩性、构造、地应力等方面对隧道开挖所经受的变形范围及程度进行了详细的分析。从目前开挖情况看,2号斜井及相应正洞穿过下朝塘断裂带变形预测较为合理,而页岩为主夹炭质页岩段的变形预测还有待开挖对比。

Research purposes： Predicting and monitoring the soft rock deformation is a complex and important work in railway engineering,and searching an effective method for predicting and monitoring the soft rock deformation is of significance. Research conclusions：For the soft rock deformation of the Tianpingshan Tunnel,the comprehensive survey was conducted and the analysis of the deformation range and deformation level caused by the excavation was made from the lithology characters,structure and ground stress.It can be seen from the current excavation that the prediction of the deformation of the the incline shaft 2 and the main tunnel that under-passes the Chaotang Fault Zone is rather reasonable and whether the prediction of the deformation of carbonaceous shale area is correct or not,it needs waiting for comparing it with the excavation result.