Design of underground seepage pipe in riverside area based on coupled seepage-pipe flow model
The gap between the groundwater level and the river level during flood seasons along riverside areas is large,and the construction of underground structures destroys the natural seepage field of aquifers,resulting in poor groundwater infiltration and weak effect of sponge city and resilient city.In order to mitigate the influence of impermeable structures represented by deep foun-dation pits on groundwater obstruction,a coupled seepage-pipe flow model and the concept of equivalent permeability coefficient of pipe flow were introduced to construct a seepage FEM model.Taking the total amount of groundwater seepage as an evaluation index,we studied the influences of different designed parameters of the underground seepage pipe on restoring underwater seep-age.The results showed that the reasonable placement of the underground seepage pipe was conducive to the restoration of the total groundwater seepage in the area around underground structures.An underground seepage pipe with dense arrangement,reasonable pipe length and radius can reduce the flow reduction ratio to groundwater flow from 4.33%to 2.42%in unit time,which demon-strates that the underground seepage pipe has positive effect on restoring natural underground seepage.
groundwaterseepageunderground seepage pipenumerical simulationunderground structareriverside city
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