深圳第三通道工程下穿梅林水库渗流耦合效应研究

Study on coupling effect of water seepage of Shenzhen third passage under passing Meilin Reservoir

以深圳市新区-原特区内第三通道工程为背景,借助MIDASGTS有限元分析软件,研究山岭隧道下穿水库时渗流耦合效应对隧道结构的变形及受力影响。通过对比不同水库水位、不同隧道覆土厚度条件下隧洞周围渗流、隧道结构的变形与受力情况,进行下穿水库静力场和渗流场耦合分析,研究山岭隧道下穿水库合理净距,以及水库水位变化对隧道结构内力的影响及相互关系,并总结出工程设计的经验方法。

Taking the third passage project in Shenzhen New District to the former Special Zone as an example, and with the aid of MIDAS GTS finite element analysis software, this paper studies the coupling effect of water seepage in the mountainous tunnel under the reservoir, its impact on the deformation and stress of tunnel structure. By comparing the seepage around the tunnel and the deformation and stress of tunnel structure under the conditions of different reservoir water level and different tunnel cover thickness, it carries out coupling analysis of tunnel under passing reservoir static fi eld and seepage field, carrying out the study of the reasonable clearance distance of mountainous tunnel under passing reservoir, and the impact of reservoir water level change on the internal force of tunnel structure and their relationship. It summarizes the experience and method of engineering design.