阿拉坦隧道V级围岩浅埋段全位移现场测试与数值分析
发布时间：2018-08-12 11:58
【摘要】：隧道开挖过程中，，围岩变形的监控量测对隧道安全施工非常重要。目前，隧道围岩位移监控量测一般对掌子面开挖后围岩的变形量测，造成了围岩变形信息收集不完整，即存在一定损失位移尤其是软弱围岩更不能忽略。本文依托阿拉坦隧道监控量测，对隧道出口浅埋段开挖过程地表和围岩竖向位移进行了监测，并在此基础上三维模拟了隧道开挖过程围岩变形，得到了阿拉坦隧道V级围岩出口浅埋段全位移变化规律。其主要研究内容如下： 1.依据阿拉坦隧道施工过程中现场测试得到了，地表和围岩竖向全位移，分析了隧道开挖过程中地表和围岩竖向全位移变化规律。 2.运用MIDAS GTS有限元软件，实现了对隧道开挖全过程的三维数值模拟。并将数值计算结果与实测地表、围岩竖向全位移进行了对比，分析了计算结果和实测结果的差异及其原因。 3.通过三维隧道开挖全过程数值模拟，分析了V级围岩洞口浅埋段施工过程中的地表沉降与隧道围岩周边不同深度处全位移变化规律；并研究了隧道施工过程中围岩分布范围，以及造成该范围大小的原因。 通过围岩全位移的研究，为类似隧的设计和安全施工提供了参考依据。
[Abstract]:In the course of tunnel excavation, the monitoring and measurement of surrounding rock deformation is very important to the safe construction of tunnel. At present, the displacement monitoring measurement of tunnel surrounding rock is generally used to measure the deformation of surrounding rock after excavation, which results in incomplete collection of deformation information of surrounding rock, that is, there is a certain loss of displacement, especially the weak surrounding rock can not be ignored. Based on the monitoring measurement of Alatan tunnel, the vertical displacement of surface and surrounding rock in shallow buried section of tunnel exit is monitored, and the deformation of surrounding rock during tunnel excavation is simulated. The variation law of total displacement at the exit of V-level surrounding rock in Alattan Tunnel is obtained. The main research contents are as follows: 1. According to the field test during the construction of the Alattan tunnel, the vertical total displacement of the surface and surrounding rock is obtained, and the variation law of the vertical total displacement of the surface and surrounding rock during the excavation of the tunnel is analyzed. 2. The three-dimensional numerical simulation of the whole process of tunnel excavation is realized by using MIDAS GTS finite element software. The results of numerical calculation are compared with the measured total vertical displacement of the surrounding rock and the difference between the calculated results and the measured results is analyzed and the reasons for the difference between the calculated results and the measured results are analyzed. Through the numerical simulation of 3D tunnel excavation, this paper analyzes the law of surface subsidence and total displacement variation at different depths around tunnel surrounding rock during the construction of shallow buried section of V-class surrounding rock, and studies the distribution range of surrounding rock during tunnel construction. And the cause of the range. The research on the total displacement of surrounding rock provides a reference for the design and safe construction of similar tunnel.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U456.3
本文编号：2178987
[Abstract]:In the course of tunnel excavation, the monitoring and measurement of surrounding rock deformation is very important to the safe construction of tunnel. At present, the displacement monitoring measurement of tunnel surrounding rock is generally used to measure the deformation of surrounding rock after excavation, which results in incomplete collection of deformation information of surrounding rock, that is, there is a certain loss of displacement, especially the weak surrounding rock can not be ignored. Based on the monitoring measurement of Alatan tunnel, the vertical displacement of surface and surrounding rock in shallow buried section of tunnel exit is monitored, and the deformation of surrounding rock during tunnel excavation is simulated. The variation law of total displacement at the exit of V-level surrounding rock in Alattan Tunnel is obtained. The main research contents are as follows: 1. According to the field test during the construction of the Alattan tunnel, the vertical total displacement of the surface and surrounding rock is obtained, and the variation law of the vertical total displacement of the surface and surrounding rock during the excavation of the tunnel is analyzed. 2. The three-dimensional numerical simulation of the whole process of tunnel excavation is realized by using MIDAS GTS finite element software. The results of numerical calculation are compared with the measured total vertical displacement of the surrounding rock and the difference between the calculated results and the measured results is analyzed and the reasons for the difference between the calculated results and the measured results are analyzed. Through the numerical simulation of 3D tunnel excavation, this paper analyzes the law of surface subsidence and total displacement variation at different depths around tunnel surrounding rock during the construction of shallow buried section of V-class surrounding rock, and studies the distribution range of surrounding rock during tunnel construction. And the cause of the range. The research on the total displacement of surrounding rock provides a reference for the design and safe construction of similar tunnel.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U456.3
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