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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

Active Publication Date: 2013-12-18
CCCC HIGHWAY CONSULTANTS
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Problems solved by technology

[0008] The purpose of the present invention is to provide a stiffness influence line analysis method for the shear force of the shear key of the joint of the immersed tube tunnel, so as to solve the simplified calculation of the shear force of the shear key of the joint of the immersed tube tunnel, facilitate the design of the shear key, and quickly determine the feasibility of the basic scheme sexual issues

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  • Method for analyzing stiffness influence lines of shear of shear keys of joints of immersed tube tunnel
  • Method for analyzing stiffness influence lines of shear of shear keys of joints of immersed tube tunnel

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Embodiment Construction

[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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Abstract

The invention discloses a method for analyzing stiffness influence lines of shear of shear keys of joints of an immersed tube tunnel. The method includes 1), constructing a longitudinal model of the immersed tube tunnel; 2), computing sedimentation delta and the vertical stiffness k of an optional spring; 3), computing the average stiffness and stiffness variation ratios alpha of n springs within a total-length range, and drawing a stiffness variation distribution graph; 4), replacing the longitudinal model of the immersed tube tunnel by an indefinite-length elastic foundation beam model under an integral heating working condition; 5), enabling the indefinite-length elastic foundation beam model to be equivalent to an indefinite-length beam model supported by the average stiffness under the effect of concentrated force q1; 6) solving a relation between the concentrated force q1 and force q; 7), solving a shear value at an optional section-side position by the aid of the concentrated force q1; 8), drawing a stiffness influence line of the shear of the shear key at an inspected joint position. The stiffness support in a certain miniature section [-X<0>, X<0>] under uniformly distributed load of the force q is changed into k<2> by the infinite-length elastic foundation beam model. The method has the advantages that the stiffness influence lines are multiplied by the foundation stiffness variation distribution graph to obtain the values of the shear of the shear keys of the joints, and the shear is caused due to variation of the foundation stiffness.

Description

technical field [0001] The invention belongs to the technical field of immersed tube tunnel design, and in particular relates to a simplified calculation method for the shear force key shear force of immersed tube tunnel joints, in particular to a method for calculating the shear force key shear force of immersed tube tunnel joint joints caused by changes in foundation stiffness by using stiffness influence lines. power analysis method. Background technique [0002] The force of immersed tube tunnel is a high-order statically indeterminate problem of the overlying load, immersed tube structure, joints and foundation soil. According to the composition of the vertical structure system, immersed tube tunnels can be divided into two types, one is the integral tube segment immersed tube tunnel, and the other is the segmental tube segment immersed tube tunnel. The integral pipe section immersed tunnel is composed of several pipe sections and joints between adjacent pipe sections ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50G06F19/00E02D29/073
Inventor 徐国平李毅付佰勇刘洪洲张志刚陈越
Owner CCCC HIGHWAY CONSULTANTS
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