【作者】 苏江川；

【导师】 张志强；

【作者基本信息】 西南交通大学 ， 桥梁与隧道工程， 2005， 硕士

【摘要】 随着近年来土地的高度化利用,在修建高速公路时,要完全回避滑坡地段是不可能的,在经过综合的技术经济比较后,路线不宜变更时,线路往往多以隧道形式通过滑坡地段。但是,目前对于在滑坡地段修建隧道的相关研究工作开展的还不多。因此,论文结合西部建设重点工程“西昌（黄联关）至攀枝花”高速公路中的酸水湾隧道为实际背景,对下穿巨型滑坡的酸水湾公路隧道结构安全性开展相关研究。 论文采用有限差分程序FLAC^3D,通过对酸水湾隧道的三维数值模拟分析,得出了在隧道拱顶距滑动面不同距离情况下,在隧道施工进程中,隧道支护结构受力变化规律、隧道上方滑坡体水平位移以及滑坡体应力变化规律、隧道周边位移变化规律,考察了“滑坡—隧道”二者之间的相互影响规律,分析了隧道的合理修建方法。确定了在隧道拱顶距滑动面不同距离下,隧道修建对上方滑坡体的影响程度、合理的隧道施工工法,初步确定了下穿巨型滑坡修建隧道时的安全距离。另一方面,通过分析隧道施工进程中的三维空间影响效应,研究了随着掌子面的不断推进,隧道支护结构受力以及洞周变形的变化规律。此外,初步探讨分析了降雨因素对隧道结构安全性的影响。论文的研究对该工程的设计与施工,以及今后相关类似工程的修建具有一定的指导意义。更多还原

【Abstract】 With high use of land in recent years, it’s impossible to avoid landslide field totally when constructing freeway. The lines often get across landslide field in the form of tunnel when it’s not easy to be altered, especially considering the cost of technology and economy. However, just a few research work to be developed now on constructing tunnel at landslide field. So, combination with the Suan Shui Wan road tunnel on Xi Chang (Huang Lian Guan) to Pan Zhi Hua freeway, which is the key project of western region, deploy study on the structure safety of Suan Shui Wan road tunnel which is going through under giant landslide.By 3D numerical simulation analysis of Suan Shui Wan road tunnel with finite difference program, draw the conclusion in process of tunnel construction on the following factors: the variational rule of primarily lining、 the characteristic rule of horizontal displacement and stress of landslide、 changing regulation of rim displacement, seeing about the mutual variational rule of landslide and tunnel, also analyzing the reasonable construction method,all in the precondition of considering different distance of the vault to the slip surface. With analyzing different distance of the vault to the slip surface, put forward the influence degree of the landslide when constructing tunnel under landslide, gain the reasonable construction method, and put forward the safety distance of the tunnel construction going through under the giant landslide. On the other hand, by analyzing the 3D spatial effect in process of tunnel construction, gaining the variational rule of primarily lining and rim displacement with更多还原