软弱围岩大变形治理措施有效性分析

Analysis on Effectiveness of Treatment Measures of Large Deformation of Weak Surrounding Rock

近年来,我国新一轮铁路建设规划侧重点转向边疆多山地区,隧道建设过程中出现大量软岩区,软弱围岩因其变形大、难治理而严重阻碍施工,解决软岩大变形问题不可避免。依托边疆新建某隧道工程,结合原支护方案所得软岩段监测数据,制定改进治理方案。应用有限元软件Midas/GTS进行模拟,分析改善后治理方案的软岩变形情况,并结合现场实验段监测数据综合分析治理措施的合理性,以保证软弱围岩段顺利施工。

Due to China＇s new round of railway construction planning focus steering frontier mountainous area,the process of tunnel construction in the emergence of a large number of soft rock zone,soft and weak surrounding rock due to the large deformation are difficult to be treated seriously hinder the construction,to solve the large deformation of soft rock is inevitable. Relying on the frontier in a newly built tunnel engineering,combined with the original branch income support scheme of soft rock section of monitoring data,to develop improved governance scheme. Simulations were carried out using the finite element software Midas / GTS analysis and improvement after the treatment scheme of soft rock deformation,and combining with the rationality of the comprehensive analysis of field experiment monitoring data control measures,to ensure the smooth construction of soft surrounding rock section.