Analysis of Seepage Characteristics of Deep Foundation Pits in Linjiang under the Condition of Bottom Sealing Curtain
In order to evaluate the safety of foundation pit excavation and embankment engineering under the condition of changes in river water level,and to propose prevention and control measures to prevent leakage damage and reasonable plans for foundation pit excavation,two-dimensional numerical analysis software was used to analyze the seepage characteristics of deep foundation pit excavation in Linjiang.The calculation showed that the elevation of the overflow point of the current seepage infiltration line of the embankment is located at the foot of the current embankment slope,and the seepage slope of the overflow point is smaller than the allowable seepage slope,meeting the requirements.However,after excavation of the foundation pit,if no water stop curtain construction is carried out,the elevation of the seepage line overflow point is high,and the seepage slope of the overflow point is large,which cannot meet the requirements of seepage stability.When a floor standing water stop curtain is installed,the elevation of the overflow point of the infiltration line is significantly reduced,and the infiltration slope of the overflow point is significantly reduced.However,the infiltration slope under the design water level of the river is still greater than the allowable value.The anti-seepage curtain can effectively reduce the impact of excavation on embankment seepage in this project.It can be considered to carry out construction in different regions and time periods during construction to address the adverse effects of excavation on seepage.
万方数据
维普
