Application and Analysis of Freezing Method in Defect Treatment of Diaphragm Wall in Foundation Excavation
There will be a risk of instability and water leakage when the diaphragm wall has defects.The defect area can be reinforced by using the freezing method.Based on a subway foundation excavation project,in this paper,we carry out on-site monitoring and numerical simulation analysis and compare the applicability of the HS model and the MC model in the freezing method.It is found that the HS model can better reflect the actual freezing effect and is suitable for studying the frost heave problem.Based on the HS model,the influence of the thickness,depth and width of the freezing zone on the deformation of the foundation excavation and the internal force of the support are discussed,respectively.It is suggested that the freezing zone should be 0.4～0.6 times the width of the underground continuous wall,1.5～2 times the depth of the foundation excavation,and the width of the freezing zone should be controlled to ensure the freezing effect and control the scale of the project.
foundation excavationdiaphragm wallfreezing methodHS constitutive modelsimulationmonitoring
万方数据
维普
