發(fā)布時間：2018-11-07 08:18

【摘要】：隨著我國“四縱四橫”的高鐵建設規(guī)劃，鐵路隧道的建設也日益增多，從而遇到了越來越多的技術難題。下穿隧道因為其技術難度大，不確定因素多，事故影響嚴重等特點，引起了國內(nèi)外專家學者的關注。 本文以貴州省六盤水市盤縣的背陰坡隧道為研究背景，通過理論分析、現(xiàn)場監(jiān)控量測、數(shù)值模擬和風險分析等方法相結(jié)合，研究和探討下穿隧道施工對山區(qū)高速公路路基穩(wěn)定性的影響，為確保工程的安全提供依據(jù)。主要研究工作和成果如下： ①通過對背陰坡隧道下穿斷面的監(jiān)控量測成果進行分析，，得出了下穿隧道施工引起的實際地表沉降的變化規(guī)律。 ②借助軟件MIDAS GTS建立并分析了處于3種不同位置的下穿隧道有限元計算模型，結(jié)果表明隨著隧道向邊坡坡腳方向移動，公路路基的沉降量逐漸減小，而邊坡的穩(wěn)定性逐漸降低。 ③建立并分析了不同開挖方案的下穿隧道有限元計算模型，結(jié)果表明山區(qū)公路路基的穩(wěn)定性隨著開挖進尺的減小而提高，側(cè)壁導坑法效果最好，臺階法次之，全斷面法對穩(wěn)定性影響最大。 ④對27個下穿隧道開挖施工算例進行分析，研究下穿隧道開挖施工對山區(qū)高速公路路基穩(wěn)定性的控制基準，并利用專業(yè)貝葉斯軟件Netica建立下穿隧道開挖施工風險分析模型，結(jié)果表明下穿隧道的開挖方法與下穿隧道施工風險關系最密切。 ⑤分析了下穿隧道開挖對公路路基和邊坡穩(wěn)定性的影響機理，并針對背陰坡隧道的開挖施工對路基和邊坡穩(wěn)定性影響的控制措施提出了建議。
[Abstract]:With the construction planning of "four vertical and four horizontal" high-speed railway in our country, the construction of railway tunnel is increasing day by day, so more and more technical problems are encountered. The underpass tunnel has attracted the attention of experts and scholars at home and abroad because of its technical difficulty, many uncertain factors and serious impact of accidents. In this paper, based on the research background of Yuyin slope tunnel in Pan County, Liupanshui City, Guizhou Province, the methods of theoretical analysis, on-site monitoring and measurement, numerical simulation and risk analysis are combined. This paper studies and discusses the influence of underpass tunnel construction on the stability of highway roadbed in mountainous area, which provides the basis for ensuring the safety of the project. The main research work and results are as follows: 1 through the analysis of the monitoring and measuring results of the underpass section of the tunnel, the variation law of the actual surface subsidence caused by the construction of the downhill tunnel is obtained. (2) the finite element model of underpass tunnel in three different positions is established and analyzed with the help of software MIDAS GTS. The results show that the settlement of highway subgrade decreases gradually and the stability of slope decreases with the direction of tunnel moving towards the foot of the slope. (3) the finite element calculation model of underpass tunnel with different excavation schemes is established and analyzed. The results show that the stability of highway roadbed in mountainous area increases with the decrease of excavation scale, the effect of sidewall guide pit method is the best, and the step method takes the second place. The full section method has the greatest effect on stability. (4) analyze 27 examples of underpass tunnel excavation, study the control benchmark of underpass tunnel excavation to highway roadbed stability in mountainous area, and use professional Bayesian software Netica to set up the risk analysis model of underpass tunnel excavation. The results show that the excavation method of the underpass tunnel is most closely related to the construction risk of the underpass tunnel. 5. The influence mechanism of tunnel excavation on the stability of roadbed and slope is analyzed, and some suggestions are put forward to control the influence of tunnel excavation on the stability of roadbed and slope.
【學位授予單位】：重慶大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：U455.4;U416.1

【參考文獻】

相關期刊論文 前10條

1 楊林德,黃慷;水底隧道管片構件耐久性失效風險研究[J];地下空間;2004年01期

2 黃宏偉;;隧道及地下工程建設中的風險管理研究進展[J];地下空間與工程學報;2006年01期

3 胡群芳;黃宏偉;;隧道及地下工程風險接受準則計算模型研究[J];地下空間與工程學報;2006年01期

4 陳龍;黃宏偉;;軟土盾構隧道施工期風險損失分析[J];地下空間與工程學報;2006年01期

5 張鵬;譚忠盛;;淺埋隧道下穿公路引起的路面沉降控制基準[J];北京交通大學學報;2008年04期

6 齊震明;李鵬飛;;地鐵區(qū)間淺埋暗挖隧道地表沉降的控制標準[J];北京交通大學學報;2010年03期

7 郝方,李維維,郭柏威;用ANSYS做邊坡穩(wěn)定分析[J];貴州水力發(fā)電;2005年02期

8 劉庭金;;下穿隧道施工對高速公路影響的三維數(shù)值分析[J];廣州建筑;2009年05期

9 閻寒;杜海濤;徐寶儒;閻石;;基于強度折減法的人工巖質(zhì)邊坡穩(wěn)定性分析[J];電力勘測設計;2013年02期

10 鄭瑤;周靈娜;;地鐵及地下工程領域風險管理研究現(xiàn)狀分析與展望[J];基建管理優(yōu)化;2010年02期

相關博士學位論文 前2條

1 關繼發(fā);新建地鐵隧道穿越既有地鐵安全風險及其控制技術的研究[D];西安建筑科技大學;2008年

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

本文編號：2315750