Numerical simulation of deep foundation pit dewatering and optimization of controlling land subsidence

Evaluation of the blocking effect of retaining walls on groundwater seepage in aquifers with different insertion depths

“…The soft deposits along the east coast of China are part of the alternated multi-aquifer-aquitard system (MAAS), with large thickness of aquifers (Xu et al, 2008(Xu et al, , 2009(Xu et al, , 2012a(Xu et al, , 2012bShen and Xu, 2011). Most deep excavations are conducted in the soft deposits with retaining walls installed to retain soils and to block groundwater seepage from the surroundings (Zhou et al, 2010;Pujades et al, 2012aPujades et al, , 2012bPujades et al, , 2014Wang, 2013a, 2013b). The existence of retaining walls has a great influence on overall hydraulic conductivity and changes the behavior of groundwater seepage (Jiao et al, 2006Xu et al, 2012bXu et al, , 2013aMa et al, 2013).…”

Finite-Difference Numerical Simulation of Dewatering System in a Large Deep Foundation Pit at Taunsa Barrage, Pakistan

“…In further studies, it is documented that an optimal design of a dewatering system may be achieved by the incorporation of groundwater flow modeling, inverse simulation studies, and optimization to minimize the total abstraction volume or execution cost, while satisfying the design criteria [18][19][20]. Zhou et al [21] used a three-dimensional finite-difference method for simulating pit dewatering, through the inversion of hydraulic conductivity parameters, based on field pumping tests, and concluded that the predicted hydraulic head value of the three-dimensional finite-difference model is consistent with the monitored value. Ye et al [22] developed an intelligent risk-assessment system for deep excavation dewatering, based on the coupled three-dimensional groundwater flow theory to evaluate the safety of excavation dewatering and have concluded that an increase in the insertion depth of the underground diaphragm wall will increase the water level drawdown gradually while the predicted output volume of water will decrease.…”

Technical analysis on deep foundation pit supporting in architectural engineering construction

“…During the process of excavation, it should be ensured that the construction is stable, manual excavation and mechanical excavation should be reasonably combined to effectively improve speed of earthwork excavation construction. The dug earth should be transported to other places in time, and it should be guaranteed the certain distance between the foundation pit and transportation vehicles, lest the transportation vehicles impact stability of the foundation pit [4] . For earthwork, the foundation pit needs to be backfilled, it should be placed around the foundation pit after excavation, and there should be also certain distance between the foundation pit and the earthwork.…”