Study on Water Head Loss Pattern in Typical Stratigraphic Combination Structure in Xiamen
During groundwater seepage in weakly permeable stratum,pore water pressure loss happens along the seepage path,and such loss is affected by many factors such as soil mass permeability coefficient,soil layer thick-ness and water head pressure.The model test on water head loss of composite stratum structure under different water head pressures has been conducted,to investigate how the pore water pressure is propagated in weakly permeable stratum.As the results indicate:In composite stratum structure,pore water pressure decreases as the soil layer thick-ness increases,pressure jump happens at the interfaces between the soil layers,and feeble confined water occurs in the highly permeable stratum;the water head loss is in positive correlation with water head pressure and soil layer thickness,but in negative correlation with the soil layer permeability coefficient;by using the test results,the rela-tional expression for water head loss Δh,soil mass permeability coefficient,soil layer thickness and water head pres-sure has been established.
Water head lossPore pressure propagationTypical stratumPermeability coefficient
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