【摘要】：在已規(guī)劃和設(shè)計的隧道中，軟弱圍巖隧道越來越多，，由于現(xiàn)在對軟弱圍巖大變形產(chǎn)生的機理和變形控制在設(shè)計和施工中均沒有形成一個完整系統(tǒng)的理論體系，因此，對軟弱圍巖大變形理論、開挖工法和支護控制措施進行研究，解決軟弱圍巖隧道開挖所產(chǎn)生的大變形等災害就越顯的迫在眉睫。 本論文以迎風隧道為工程依托，以相關(guān)文獻為基礎(chǔ)，對軟弱圍巖大變形概念、大變形發(fā)生機理、大變形劃分類型、大變形的界定和等級劃分進行了總結(jié)分析。介紹了迎風隧道地形地質(zhì)、圍巖特性、等級劃分、施工中產(chǎn)生的大變形問題及大變形力學分析。采用巖土工程軟件FLAC3D針對該隧道特定的工程地質(zhì)條件進行大變形模擬驗證，并針對該隧道大變形的工程特點和現(xiàn)場情況，提出了兩種控制技術(shù)：①隧道圍巖擴挖控制技術(shù)；②預應力錨索支護控制技術(shù)。 隧道圍巖規(guī)律性擴挖大變形控制技術(shù)研究：通過選取某開挖斷面，采取0.60m、0.65m、0.70m和0.75m四種擴挖量對隧道圍巖和擴挖支護、初期支護應力，以及擴挖輪廓線、初支內(nèi)外側(cè)輪廓線上隧道不同部位豎向沉降位移、水平收斂位移模擬和對比，對該方案的可行性及合理擴挖量進行分析。 預應力錨索支護控制技術(shù)研究：采用不同等級預應力錨索對隧道加固模擬計算，對隧道圍巖、初期支護和錨索軸力、應力，以及初支內(nèi)外側(cè)輪廓線隧道不同部位的豎向沉降位移、水平收斂位移對比，分析預應力錨索對隧道大變形控制效果。 論文在最后對兩個控制方案的大變形控制效果做了總結(jié)和對比分析，給出有效的控制方案，即通過隧道圍巖規(guī)律性擴挖來進行大變形控制。并指出了隧道大變形尚未解決的問題，即理論體系和工程實踐中控制技術(shù)中存在的難題。
[Abstract]:Among the tunnels that have been planned and designed, there are more and more soft surrounding rock tunnels. Because the mechanism and deformation control of large deformation of soft surrounding rock have not formed a complete and systematic theoretical system in design and construction, In this paper, the theory of large deformation of soft surrounding rock, excavation method and supporting control measures are studied. It is more and more urgent to solve the disasters such as large deformation caused by excavation of soft surrounding rock tunnel. Based on the engineering of windward tunnel and related literature, this paper summarizes and analyzes the concept of large deformation of soft surrounding rock, the mechanism of large deformation, the classification of large deformation, the definition and grade of large deformation. This paper introduces topographic geology, surrounding rock characteristics, classification of surrounding rock, large deformation problem and mechanical analysis of large deformation in construction of windward tunnel. The geotechnical engineering software FLAC3D is used to simulate and verify the large deformation of the tunnel's specific engineering geological conditions. According to the engineering characteristics and site conditions of the tunnel, two kinds of control techniques are put forward. 2 Prestressed anchor cable support control technology. Study on the control technology of large deformation of tunnel surrounding rock: by selecting a certain excavation section, four kinds of expanding excavations, including 0.60mL 0.65mm 0.70m and 0.75m, to the surrounding rock and support of tunnel, the initial support stress, and the contour line of the expanded excavation, are adopted. The vertical settlement displacement and horizontal convergent displacement of different parts of the tunnel on the inner and outer side contour of the primary support are simulated and compared. The feasibility of the scheme and the reasonable amount of expansion are analyzed. Study on the Control Technology of Prestressed Anchor Cable support: using different grades of Prestressed Anchorage cables to simulate the reinforcement of the tunnel, the axial force and stress of the surrounding rock, the initial support and the anchor cable of the tunnel are calculated. The vertical settlement displacement and horizontal convergent displacement of different parts of the tunnel with the inner and outer side profile of the initial support are compared and the control effect of the prestressed anchor cable on the large deformation of the tunnel is analyzed. At the end of the paper, the control effect of the two control schemes is summarized and compared, and the effective control scheme is given, that is, the large deformation control is carried out by the regular expansion and excavation of the surrounding rock of the tunnel. It also points out the unsolved problems of large deformation of tunnel, that is, the problems existing in the theory system and control technology in engineering practice.
【學位授予單位】：長安大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：U452.12;U455.4

【參考文獻】

相關(guān)期刊論文 前10條

1 徐林生,李永林,程崇國;公路隧道圍巖變形破裂類型與等級的判定[J];重慶交通學院學報;2002年02期

2 羅清明,李亮,楊小禮;軟巖隧道的圍巖變形計算[J];長沙鐵道學院學報;2003年02期

3 趙瑜;李曉紅;盧義玉;康勇;;深埋隧道圍巖應變軟化模型參數(shù)的正交設(shè)計[J];重慶大學學報;2008年07期

4 李斌;漆泰岳;高波;曠文濤;;新意法(巖土控制變形工法)概述[J];公路隧道;2009年02期

5 符華興;強擠壓圍巖隧道施工支護技術(shù)的商榷[J];隧道建設(shè);2003年01期

6 翟進營;楊會軍;王莉莉;;新意法隧道設(shè)計施工概述[J];隧道建設(shè);2008年01期

7 段慶偉,何滿潮,張世國;復雜條件下圍巖變形特征數(shù)值模擬研究[J];煤炭科學技術(shù);2002年06期

8 朱德仁;巖石工程破壞準則[J];煤炭學報;1994年01期

9 劉志春;孫明磊;賈曉云;朱永全;;烏鞘嶺隧道F4~F7斷層區(qū)段壓力、應力實測與分析[J];石家莊鐵道學院學報;2006年02期

10 孫明磊;劉志春;張德瑩;;烏鞘嶺隧道F7斷層區(qū)段左線迂回導坑監(jiān)控量測[J];石家莊鐵道學院學報;2006年02期

本文編號：2260058