【摘要】：由于城市人口不斷增加以及迅猛發(fā)展的城市化進(jìn)程,城市的建設(shè)將面對(duì)更大的挑戰(zhàn)。交通是城市發(fā)展進(jìn)步的重中之重,一個(gè)城市想要得到長期的可持續(xù)發(fā)展的未來,必須注重交通的發(fā)展。交通問題如果不能妥善的解決,就有可能致使城市的崩潰。這時(shí)大力發(fā)展軌道交通就能促使城市建設(shè)朝著更好的方向發(fā)展。但是,大量修建地鐵隧道會(huì)使地層受到擾動(dòng),引發(fā)四周的地層產(chǎn)生移動(dòng)及應(yīng)力重分布。由于地鐵隧道存在埋深的問題,那么怎樣規(guī)劃隧道的埋深是一項(xiàng)重要的任務(wù)。其次,隧道在城市中的開挖會(huì)對(duì)建筑物造成影響,那么對(duì)隧道和建筑物進(jìn)行風(fēng)險(xiǎn)評(píng)估就非常重要。本文進(jìn)行的主要工作如下:①本文深入地分析了隧道施工過程中開挖引起的地層移動(dòng)與變形的幾個(gè)方面,包括:襯砌的變形、施工過程中造成的地層損失、土體四周孔隙水變化的情況以及在剪力破壞下的土體再固結(jié)。這里面地層的損失與地層排水引發(fā)的地層表面的移動(dòng)及變形是最重要的。②本文還對(duì)造成地表移動(dòng)的幾個(gè)因素(開挖的深度、開挖的斷面大小及開挖所處的地層條件)分別做了闡述和分析。③地層是隧道和上部結(jié)構(gòu)聯(lián)系的唯一介質(zhì),建筑物狀態(tài)的好與壞完全由地層狀況和其產(chǎn)生的支承作用決定。隧道—土體—建筑物動(dòng)態(tài)相互作用是十分復(fù)雜的,三者構(gòu)成了一個(gè)包含多元結(jié)構(gòu)、多因素的綜合體系。④對(duì)隧道和建筑物之間的相互影響進(jìn)行了分析,包括偏移距離、埋置深度、圍巖的級(jí)別,基礎(chǔ)的剛度等因素。通過分析可以發(fā)現(xiàn),隧道和建筑物存在相互作用的時(shí)候,隧道的最不利的位置為在建筑物邊緣的時(shí)候,并不是處于建筑物正下方的時(shí)候。⑤提出了風(fēng)險(xiǎn)的相關(guān)概念,闡明了風(fēng)險(xiǎn)的產(chǎn)生的過程及風(fēng)險(xiǎn)控制的基本思路,并提出了運(yùn)用風(fēng)險(xiǎn)的突變分析理論對(duì)隧道風(fēng)險(xiǎn)進(jìn)行分析。
[Abstract]:With the increasing of urban population and the rapid development of urbanization, urban construction will face more challenges. Traffic is the most important part of urban development and progress. If a city wants to obtain long-term sustainable development, it must pay attention to the development of traffic. If the traffic problem can not be solved properly, it may lead to the collapse of the city. At this time, the development of rail transit can promote urban construction towards a better direction. However, a large number of subway tunnels will disturb the strata and cause the surrounding strata to move and stress redistribution. How to plan the depth of subway tunnel is an important task because of the problem of buried depth in subway tunnel. Secondly, the tunnel excavation in the city will have an impact on the building, so it is very important to assess the risk of the tunnel and the building. The main work of this paper is as follows: 1 this paper deeply analyzes several aspects of stratum movement and deformation caused by excavation during tunnel construction, including: deformation of lining, formation loss caused during construction, The change of pore water around soil and the soil reconsolidation under shear failure. The loss of the stratum and the movement and deformation of the stratum surface caused by the drainage are the most important. 2 the paper also analyzes several factors that cause the surface movement (the depth of the excavation, the depth of the excavation). (3) the stratum is the only medium for the connection between the tunnel and the superstructure, and the good or bad state of the building is completely determined by the formation condition and its supporting function. The dynamic interaction between tunnel, soil and building is very complicated, and the three constitute a comprehensive system with multiple structures and many factors. 4 the interaction between tunnel and building is analyzed, including the offset distance. Buried depth, surrounding rock grade, foundation stiffness and other factors. From the analysis, we can find that when there is interaction between tunnel and building, the most disadvantageous position of tunnel is at the edge of the building, not when it is directly below the building. This paper expounds the process of risk generation and the basic idea of risk control, and puts forward the analysis of tunnel risk by using the catastrophe analysis theory of risk.
【學(xué)位授予單位】：重慶交通大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TU45;U231.3

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本文編號(hào)：2332395