Numerical Analysis of Seepage Field of Underground Pump House in Water-rich Area and Its Influence on Lining Structure
The movement of groundwater in the formation affects the safety of the underground pump room struc-ture.Under the action of permeable water pressure,the surrounding rock of the cave is easy to cause infiltration prob-lems,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 pum-ping 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 the grouting ring or enhancing the water permeability of the lin-ing could reduce the external water pressure on the outer edge of the lining.The research results could provide a reference for the optimization design of similar projects.
万方数据
维普
