【摘要】：隧道開挖過程中，，圍巖變形的監(jiān)控量測對隧道安全施工非常重要。目前，隧道圍巖位移監(jiān)控量測一般對掌子面開挖后圍巖的變形量測，造成了圍巖變形信息收集不完整，即存在一定損失位移尤其是軟弱圍巖更不能忽略。本文依托阿拉坦隧道監(jiān)控量測，對隧道出口淺埋段開挖過程地表和圍巖豎向位移進(jìn)行了監(jiān)測，并在此基礎(chǔ)上三維模擬了隧道開挖過程圍巖變形，得到了阿拉坦隧道V級圍巖出口淺埋段全位移變化規(guī)律。其主要研究內(nèi)容如下： 1.依據(jù)阿拉坦隧道施工過程中現(xiàn)場測試得到了，地表和圍巖豎向全位移，分析了隧道開挖過程中地表和圍巖豎向全位移變化規(guī)律。 2.運(yùn)用MIDAS GTS有限元軟件，實(shí)現(xiàn)了對隧道開挖全過程的三維數(shù)值模擬。并將數(shù)值計算結(jié)果與實(shí)測地表、圍巖豎向全位移進(jìn)行了對比，分析了計算結(jié)果和實(shí)測結(jié)果的差異及其原因。 3.通過三維隧道開挖全過程數(shù)值模擬，分析了V級圍巖洞口淺埋段施工過程中的地表沉降與隧道圍巖周邊不同深度處全位移變化規(guī)律；并研究了隧道施工過程中圍巖分布范圍，以及造成該范圍大小的原因。 通過圍巖全位移的研究，為類似隧的設(shè)計和安全施工提供了參考依據(jù)。
[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.
【學(xué)位授予單位】：長安大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：U456.3

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