發(fā)布時間：2018-04-29 15:27

  本文選題：土石混填地基 + 隧道結構�。� 參考：《重慶大學》2014年碩士論文

【摘要】：土石混合體是自然界常見的一種巖土體，它對隧道的不良影響主要表現(xiàn)為因地基承載力不足而發(fā)生隧道整體或局部下沉、向洞內擠壓和底板隆起，以及由此引發(fā)的各種結構損傷。當隧道坐落在這種地基上時，如處理不當，，易給工程建設帶來難題及造成危害。 論文以實際隧道工程為依托，采用現(xiàn)場調查、理論研究及數(shù)值模擬相結合的方法，對土石混填地基隧道結構穩(wěn)定性及補強措施進行研究，開展的主要工作如下： ①收集該案例隧道的勘察、設計、施工等相關資料，對案例工程隧道結構的開裂情況進行實地調查和分析。 ②通過數(shù)值模擬試驗獲得土石混填地基的力學參數(shù)。運用MATLAB隨機程序結合CAD繪圖軟件生成土石混合體隨機模型，導入FLAC3D進行數(shù)值模擬試驗。根據(jù)數(shù)值模擬試驗結果對數(shù)據(jù)進行處理，得出土石混合體的彈性模量、粘聚力、內摩擦角和泊松比。 ③采用GTS有限元分析軟件模擬土石混填地基隧道結構的穩(wěn)定性。運用地層結構法和荷載結構法模擬隧道現(xiàn)狀回填情況和回填完成情況下隧道結構的穩(wěn)定性，根據(jù)模擬結果分析隧道產生裂縫的原因，并與實際情況相對比。 ④結合隧道實際情況及前人經(jīng)驗進行理論分析，確定隧道結構的補強加固方案。對該補強加固方案進行數(shù)值分析，與未補強情況下隧道回填完成時模擬結果進行對比，并評價該補強加固效果。
[Abstract]:The soil-rock mixture is a common rock and soil mass in nature. Its adverse effect on the tunnel is mainly caused by the overall or local subsidence of the tunnel due to the insufficient bearing capacity of the foundation, the extrusion of the tunnel and the uplift of the bottom plate. And the resulting structural damage. When the tunnel is located on this foundation, if it is not handled properly, it will bring problems and harm to the engineering construction. Based on the actual tunnel engineering, the paper studies the stability and reinforcement measures of the tunnel structure with the combination of field investigation, theoretical research and numerical simulation. The main work is as follows: The main contents are as follows: 1. Collect the investigation, design, construction and other relevant data of the case tunnel, and carry out field investigation and analysis on the cracking situation of the tunnel structure of the case engineering. 2. The mechanical parameters of soil and rock fill foundation are obtained by numerical simulation test. The soil-rock mixed random model was generated by using MATLAB random program and CAD drawing software, and was imported into FLAC3D to carry out numerical simulation test. The elastic modulus, cohesive force, internal friction angle and Poisson's ratio of soil-rock mixture are obtained by processing the data according to the results of numerical simulation test. GTS finite element analysis software is used to simulate the stability of the tunnel structure. The stability of tunnel structure under the condition of backfilling and backfilling is simulated by the method of stratum structure and load structure. According to the simulation results, the causes of the cracks in the tunnel are analyzed and compared with the actual situation. 4According to the actual situation of the tunnel and the previous experience, the reinforcement scheme of the tunnel structure is determined. The numerical analysis of the reinforcement scheme is carried out, which is compared with the simulation results when the backfill of the tunnel is completed without reinforcement, and the effect of the reinforcement is evaluated.
【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】：U451;U452.11

【參考文獻】

相關期刊論文 前10條

1 黃宏偉;城市隧道與地下工程的發(fā)展與展望[J];地下空間;2001年04期

2 李振,李鵬;粗粒土直接剪切試驗抗剪強度指標變化規(guī)律[J];防滲技術;2002年01期

3 徐文杰;胡瑞林;;虎跳峽龍蟠右岸土石混合體粒度分形特征研究[J];工程地質學報;2006年04期

4 廖秋林;李曉;郝釗;王思敬;吳碩;赫建明;;土石混合體的研究現(xiàn)狀及研究展望[J];工程地質學報;2006年06期

5 陳澤魁;公路隧道襯砌混凝土裂縫的成因與防治[J];廣東建材;2005年08期

6 武明;土石混合非均質填料壓實特性試驗研究[J];公路;1996年05期

7 武明;土石混合非均質填料力學特性試驗研究[J];公路;1997年01期

8 林伍湖,邱榕木;不良地質條件下隧道病害治理方法[J];公路;2000年05期

9 王 龍,馬松林,徐德興,孫愛民;土石混合料的結構分類[J];哈爾濱建筑大學學報;2000年06期

10 陳禮偉;淺析隧道病害產生的原因[J];隧道建設;2004年02期

相關博士學位論文 前1條

1 伍毅敏;軟基隧道支護機理與病害防治技術研究[D];長安大學;2008年

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