重庆南山地区地下水系对不同时期修建隧道安全距离的影响研究

发布时间：2018-05-26 07:36

本文选题：隧道 + 渗流　；参考：《重庆交通大学》2014年硕士论文

【摘要】：随着地下空间的开采，不可避免的出现了隧道与其他建（构）筑物相互影响的问题，尤其是繁华的城市地段，隧道间、隧道与其他建筑物间的距离越来越小，因此有必要研究一下近距离交叠隧道相互影响的问题。隧道是一种地下线状结构物，在其修建的过程中往往会遇到各种不同性质的地下岩石或土体，尤其是深埋隧道，其通过的地段地质情况更为复杂。隧道在修建过程中常常会遇到地下水，由于隧道的开挖改变了原有地下水的渗流情况，隧道成为了地下水排泄的通道，因此隧道的涌水成为隧道施工过程中常见的地质灾害之一。另外随着我国水资源的逐渐消耗，不排水隧道越来越多。针对这种情况研究一下考虑地下水存在的情况下隧道间安全距离的问题很有意义。本文以南山地区隧道群为背景，根据地下水渗流规律，，按照流固耦合理论，模拟南山地区不同时期修建的隧道，从而来研究考虑地下水时隧道合理间距的问题。希望能为隧道工程设计、施工做参考。本文主要做了以下工作： ①地下水渗流理论和固结理论研究； ②衬砌水压力理论研究以及在FLAC中模拟实现的方法； ③使用FLAC模拟了早期隧道的开挖、水位上升等以及对隧道衬砌的影响； ④新隧道的开挖对孔隙水压力分布、旧隧道衬砌内力的影响； ⑤两隧道间距不同时，衬砌内力、地表沉降的变化； ⑥分析模拟结果，得出合理间距的范围。
[Abstract]:With the exploitation of underground space, the interaction between tunnels and other buildings is inevitable, especially in the bustling urban areas, the distance between tunnels and other buildings is getting smaller and smaller. Therefore, it is necessary to study the interaction of close-over tunnels. Tunnel is a kind of underground linear structure. In the process of its construction, there are many kinds of underground rock or soil, especially the deep buried tunnel, which are more complicated in geological conditions. In the process of tunnel construction, groundwater is often encountered. Because the excavation of tunnel changes the seepage situation of the original groundwater, the tunnel becomes the channel of groundwater discharge. Therefore, water gushing becomes one of the common geological hazards in tunnel construction. In addition, with the gradual consumption of water resources in China, more and more undrained tunnels. In view of this situation, it is meaningful to study the safe distance between tunnels considering the existence of groundwater. In this paper, the tunnel group in Nanshan area is taken as the background, according to the law of groundwater seepage, according to the theory of fluid-solid coupling, the tunnel built in different periods in Nanshan area is simulated, so as to study the reasonable distance between tunnels when considering groundwater. Hope to be a reference for tunnel engineering design and construction. The main work of this paper is as follows: (1) study on groundwater seepage theory and consolidation theory; (2) the theoretical study of lining water pressure and the method of simulation in FLAC; (3) FLAC is used to simulate the early tunnel excavation, water level rise and its influence on tunnel lining. (4) the influence of excavation of new tunnel on pore water pressure distribution and internal force of lining of old tunnel; (5) the variation of lining internal force and surface settlement with different spacing between the two tunnels; 6 the range of reasonable spacing is obtained by analyzing the simulation results.
【学位授予单位】：重庆交通大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U452

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