Combined with the TOD project of Hangzhou West Railway Station,the earthwork excavation construction technology of enclosure construction,earthwork excavation,support structure construction is put forward.A three-dimensional solid nonlinear finite element model was established to simulate and analyze the stress of deep foundation excavation under the final state of excavation and support before excavation.Based on the numerical simulation results,the whole process of excavation is monitored.The results show that the concrete at the most lateral support of the angle support,supporting and the eight-shaped support connected to the the enclosure is subjected to a large force.Compared with the displacement of the wall top,the horizontal displacement from the deep part of the underground continuous wall to the second concrete support is larger.Comparing the numerical simulation results with the construction monitoring data,the errors of the support axial force and the deep horizontal displacement of the underground continuous wall are 4.0％and 6.2％,respectively,indicating that the numerical simulation analysis results can be used to guide the construction monitoring.The maximum axial force of the support and the displacement of the deep soil did not exceed the corresponding design requirements.
tall buildingsdeep foundation excavationearthwork excavationsupportssimulationmonitoring
维普
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