【作者】 粟伟；

【导师】 赵建三； 唐平英；

【作者基本信息】 长沙理工大学 ， 道路与铁道工程， 2008， 硕士

【摘要】 随着我国公路事业的蒸蒸日上,高速公路里程不断刷新记录。作为保证快速交通得以实现的穿越层层山岭的隧道,在公路工程中已成为重要的一环。在以往的高速公路修建时,隧道设计方案多采用双洞分离的形式,通过在左右洞之间保持一定的间距保证隧道设计施工的安全。近年来,由于高速公路普遍向双向六车道及其以上趋势发展,连拱隧道方案成为隧道设计与施工较多的采用形式。连拱隧道线形流畅,占地面积少,空间利用率高,避免了洞口路基或大桥分幅,与洞外线路连接方便。然而如何安全地施工大跨径双连拱隧道,保障其安全的,正常的掘进,是近年很多学者和现场工程人员努力探索的一个重要工程问题。如何通过监控以及建模模拟实际结构进行安全性分析即为本文要探索的重要内容。本文通过总结近年来各地的大跨径连拱隧道的施工经验,对大跨径连拱隧道的结构特点,施工工艺,设计经验,围岩破坏类型,病害机理等进行了研究和总结;通过宛坪高速公路内乡至西坪段刘家湾双向六车道大跨径连拱隧道围岩收敛位移的监测数据以及期间曾经的塌方过程的全程监控数据,进行了位移预测灰色系统模型的建立和分析;通过有限元软件建模,模拟现场隧道坍塌情况,结合隧道典型破坏断面底摩擦试验揭示了塌方过程与破坏机理,从而对现场施工方案进行了综合分析比选,得出了该项目工程更为有利的施工方法,对今后类似工程具有指导和借鉴意义。更多还原

【Abstract】 Along with the highway business of our country make rapid progress, the superhighway mileage brushes the new record continuously. The tunnel make an assurance to the fast transportation , and become more and more important in the highway engineering. In the former superhighway congstruction, the tunnel design project adopts the form that the two holeses separated,to make sure the safety of the tunnel designs and construction. Recently,the former superhighway are becoming more and more width, adoption the arch tunnel which the two holes connected has become the direction of tunnel design and construction. There are many advantage about the arch tunnel which the two holes connected, such as line form flowing freely belong to the entire road design, cover the area little, the space utilization is high, avoiding the connection that between the roadbed and the tunnel entrance or between the big bridges and the tunnel entrance take much area if adopt the holes separated, link with the outside road convenience. However how to construct the arch tunnel which the two holes connected safely,how to make sure it is stable, is an important civil engineering problem which puzzled a lot of scholars recently.In this text,I have summary the characteristics ,the construction craft and the design experience about the arch tunnel which the two holes connected by summarying the construction experience domestic and international in recent years. Set up a Grey-Model to predict and analyze the rock displacement depend on the rock displacement datum in the construction of the Liu Jia Wan arch tunnel which has six driveways. And set up a mold through a Limited dollar software, imitate the spot hole room circumstance, carry on the valid number analysis,landslide calculation and deduce.Build up an useful model to predict the rock displacement and an imitation laboratory model to analyze the landslide process,point out a better construction method. It is useful to the similar engineering and someone could develop it more.更多还原