【摘要】：我國中西部為多山地區(qū)，地質(zhì)條件復(fù)雜多變，軟弱圍巖經(jīng)常出現(xiàn)。在此地區(qū)修建的高速公路隧道會受到地質(zhì)和地形條件限制。小凈距隧道這種特殊結(jié)構(gòu)形式因其對地形的適應(yīng)性好、施工方法較連拱隧道簡單等優(yōu)點，在工程中的運用越來越多。如何保證在軟弱圍巖條件下小凈距隧道在修建過程中的整體穩(wěn)定性，防止出現(xiàn)大變形大塌方事故，是亟待解決的問題。 論文依托谷城至竹溪高速公路分水嶺隧道，通過隧道圍巖穩(wěn)定性理論分析、施工過程的現(xiàn)場監(jiān)控量測、數(shù)值模擬研究等方法，對軟弱圍巖條件下小凈距隧道的監(jiān)控量測技術(shù)和穩(wěn)定性進行了研究。論文主要內(nèi)容和取得成果如下： （1）通過查閱分水嶺隧道勘察資料、施工圖以及現(xiàn)場實地察看，獲得該隧道詳實的工程資料。 （2）介紹了分水嶺隧道的監(jiān)控量測方案和對于所采集數(shù)據(jù)的判定方法，總結(jié)了分水嶺隧道從開始施工到結(jié)束期間所有斷面的拱頂沉降及周邊位移最終變形數(shù)據(jù)，找出其大致與圍巖的對應(yīng)關(guān)系。 （3）分析影響圍巖穩(wěn)定的內(nèi)在和外在因素，結(jié)合所有斷面現(xiàn)場監(jiān)測數(shù)據(jù)以及對代表性斷面的監(jiān)測數(shù)據(jù)分析，，通過對各類圍巖變形特性分析，預(yù)測初期支護趨于穩(wěn)定的時間，為二次襯砌施作時間提供合理依據(jù)。 （4）通過有限元分析軟件對分水嶺隧道Ⅳ、Ⅴ級圍巖開挖過程進行了數(shù)值模擬，對開挖過程中隧道的變形、初期支護結(jié)構(gòu)的受力進行了分析，得到的位移變形與監(jiān)控量測數(shù)據(jù)基本吻合，初期支護和中夾巖柱的注漿加固措施對于隧道圍巖的整體穩(wěn)定是合理有效的。
[Abstract]:The central and western regions of China are mountainous areas with complex geological conditions and weak surrounding rocks. The construction of expressway tunnels in this area will be limited by geological and topographic conditions. How to ensure the overall stability of the tunnel with small clearance under the condition of weak surrounding rock and prevent the occurrence of large deformation and landslide accidents is an urgent problem to be solved.
Based on the Watershed Tunnel of Gucheng-Zhuxi Expressway, the monitoring and measuring technology and stability of small clearance tunnel under the condition of weak surrounding rock are studied by means of theoretical analysis of surrounding rock stability, field monitoring and measurement during construction, and numerical simulation.
(1) By consulting the survey data, construction drawings and on-site inspection of the watershed tunnel, the detailed engineering data of the tunnel are obtained.
(2) This paper introduces the monitoring and measuring scheme of the watershed tunnel and the judging method for the collected data, summarizes the final deformation data of the vault settlement and peripheral displacement of all sections of the watershed tunnel from the beginning of construction to the end, and finds out the corresponding relationship between the vault settlement and surrounding rock.
(3) Analyzing the internal and external factors that affect the stability of surrounding rock, combining with the field monitoring data of all sections and the monitoring data analysis of representative sections, through the analysis of deformation characteristics of various types of surrounding rock, predicting the time when the initial support tends to be stable, providing a reasonable basis for the construction time of secondary lining.
(4) The excavation process of the surrounding rock of the Watershed Tunnel Grade IV and V is simulated by the finite element analysis software. The deformation of the tunnel and the stress of the initial supporting structure are analyzed. The displacement and deformation obtained are basically consistent with the monitoring data. The initial support and the grouting reinforcement measures of the middle rock column are used for the surrounding rock of the tunnel. Overall stability is reasonable and effective.
【學位授予單位】：武漢理工大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：U456.3

【參考文獻】

相關(guān)期刊論文 前10條

1 劉偉,靳曉光,陳少華;高速公路小凈距隧道合理凈距的探討[J];地下空間;2004年03期

2 張運良;王昌勝;路平;李鳳翔;;小凈距隧道施工監(jiān)控量測與數(shù)值分析[J];鐵道科學與工程學報;2011年06期

3 喻軍;劉松玉;童立元;;小凈距隧道設(shè)計荷載的確定[J];東南大學學報(自然科學版);2008年05期

4 陽生權(quán),周健,李雪健;小凈距公路隧道爆破震動觀測與分析[J];工程爆破;2005年03期

5 何滿潮,景海河,孫曉明;軟巖工程地質(zhì)力學研究進展[J];工程地質(zhì)學報;2000年01期

6 李浩;朱向陽;徐永福;張志泉;陳寅奕;;斷面形狀對隧洞圍巖位移和應(yīng)力的影響分析[J];隧道建設(shè);2009年01期

7 董方庭，宋宏偉，郭志宏，鹿守敏，梁士杰;巷道圍巖松動圈支護理論[J];煤炭學報;1994年01期

8 韓倩;;隧道埋深對開挖穩(wěn)定性影響分析[J];佳木斯大學學報(自然科學版);2012年06期

9 王景春,殷杰;相鄰隧道中心距的研究[J];石家莊鐵道學院學報;1995年02期

10 楊會軍;王夢恕;;隧道圍巖變形影響因素分析[J];鐵道學報;2006年03期

相關(guān)博士學位論文 前1條

1 趙勇;隧道軟弱圍巖變形機制與控制技術(shù)研究[D];北京交通大學;2012年

本文編號：2178119