Numerical Simulation of Earth Pressure Distribution in Head Chamber of Shield Machine with Nonlinear Finite Element Method   Zichang Shangguan School of Civil and Hydraulic Engineering, Dalian University of Technology, Dalian 116023, P R China; Institute of Civil Engineering, Dalian Fishery University, Dalian 116023, P R China e-mail: Shangguan@dlfu.edu.cn Shouju Li Professor, State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technology, Dalian, 116024, China e-mail: Lishouju@dlut.edu.cn Qiang Zhang Mechanical Eng. College of Liaoning Technical University, Fuxin,123000, China Wei Sun Professor, School of Mechanical Eng., Dalian University of Technology Dalian, 116024, China
			ABSTRACT

Model parameters of conditioned soils in head chamber of shield machine are determined based on tri-axial compression tests in laboratory. The loads acting on tunneling face are estimated according to static earth pressure principle. Based on Duncan-Chang nonlinear elastic constitutive model, the earth pressures on head chamber of shield machine are simulated. The variation of earth pressure on different section in head chamber of shield machine is depicted. Relationship between pressure transportation factor and openings rotating cutter-head of shield machine is proposed by using aggression analysis.

Keywords: Earth pressure; Nonlinear elastic constitutive model; Pressure transportation factor; Numerical simulation.

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