富水区地下泵房渗流场及其对衬砌结构影响的数值分析  

Numerical Analysis of Seepage Field of Underground Pump House in Water-rich Area and Its Influence on Lining Structure

作　　者：曹远宜 张继勋[1] 任旭华[1] 杨翔 CAO Yuan-yi;ZHANG Ji-xun;REN Xu-hua;YANG Xiang(College of Water Conservancy and Hydropower Engineering,Hohai University,Nanjing 210098,China)

机构地区：[1]河海大学水利水电学院,江苏南京210098

出　　处：《水电能源科学》2024年第2期94-98,共5页Water Resources and Power

基　　金：云南省重大科技专项计划项目(202102AF080001)。

摘　　要：地下水在地层中运动会影响地下泵房结构的安全,在渗透水压力作用下洞室围岩易引发渗透问题致使洞室及厂房内部渗水,高地下水位产生的外水压力会影响地下洞室厂房衬砌结构安全。结合某富水区泵站工程,采用数值分析方法,构建了三维有限元模型,基于流固耦合理论,对工程区的渗流场进行分析,并研究了不同灌浆圈厚度、不同衬砌透水性下工程区外水压力变化规律。结果表明,增加灌浆圈厚度或增强衬砌的透水性均可降低衬砌外缘上的外水压力,研究成果可以为类似工程提供参考。The movement of groundwater in the formation affects the safety of the underground pump room structure.Under the action of permeable water pressure,the surrounding rock of the cave is easy to cause infiltration problems,resulting in water seepage inside the cave and the plant,and the external water pressure generated by the high groundwater level will affect the safety of the lining structure of the underground cavern plant.Combined with the pumping station project in a water-rich area,a three-dimensional finite element model was constructed by numerical analysis method.The seepage field in the engineering area based on fluid-structure interaction was analyzed.The change law of water pressure outside the engineering area under different grouting ring thicknesses and different lining permeability was studied.The results show that increasing the thickness of thegrouting ring or enhancing the water permeability of the lining could reduce the external water pressure on the outer edgeof the lining.The research results could provide a reference for the optimization design of similar projects.

关 键 词：地下泵房 衬砌 支护措施 渗流 流固耦合 

分 类 号：TV675[水利工程—水利水电工程] TV223.4