基于流固耦合城市地下通道渗流规律分析

Analysis on Seepage Law of Urban Underground Passage Based on Fluid-structure Interaction

摘要:

地下工程受地下水渗流的影响一直都是人们关注的问题，依托某城市轨道交通共建管廊工程，通过FLAC3D进行流固耦合分析地下通道对地下水渗流规律的影响以及地下水渗流规律变化对地下通道的反作用。找出限量排水情况下，地下工程结构所受孔隙水压力的分布规律及其数值的变化情况。找到结构所受应力随孔隙水压力变化而变化的规律。得出地下工程对地下水渗流规律的影响结果以及影响范围，同时发现渗流规律的变化对应力场分布范围产生的影响及最大应力分布位置和数值都有变化。

Abstract:

The influence of groundwater seepage on the underground engineering has always been a concern of the people. Relying on a utility tunnel constructed together with an urban rail transit, the fluid-structure interaction analysis is carried out through FLAC3D to study the influence of underground passage on the groundwater seepage law and the reaction of groundwater seepage law change on underground passage. The distribution law and numerical variation of pore water pressure on underground engineering structure under the limited drainage condition are found out. The variation law of the stress on structure with the change of pore water pressure is found. The influence result and influence range of underground engineering on the groundwater seepage law are obtained. At the same time, it is found that the influence of seepage law on the distribution range of stress field and the maximum stress distribution position and value are all changed.