Method for analyzing stiffness influence lines of shear of shear keys of joints of immersed tube tunnel
A technology of immersed tube tunnel and analysis method, applied in the field of immersed tube tunnel design, to achieve the effect of convenient drawing of graphics, simple formula form, and easy to grasp and apply
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[0049] The invention provides a simplified analysis method-stiffness influence line analysis method for solving the shear force of the immersed tube tunnel joint shear key shear force caused by the change of foundation stiffness.
[0050] Technical solution of the present invention comprises the steps:
[0051] 1) Construct the longitudinal calculation model of the immersed tube tunnel, which includes the beam unit for simulating the tunnel structure, the joint unit for simulating the shear key of the tunnel joint, the springs set at every unit length in the longitudinal direction to simulate the supporting effect of the foundation, and the load acting on the tunnel ;
[0052] 2) Calculate the average settlement δ of the basement at any spring position of the immersed tube tunnel under the action of the base uniform load p. Due to the uneven distribution of the soil layer, the calculated δ for each spring position is not the same. According to the formula k=p·B / δ The vertical s...
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