Structure control method based on shield tunnel lining viscoelasticity fractional derivative model

A fractional derivative, shield tunneling technology, applied in tunnel lining, tunnel, wellbore lining, etc., can solve problems such as detection and control methods that cannot be accurately controlled

Inactive Publication Date: 2013-12-11
STATE GRID CORP OF CHINA +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, the existing detection and control methods cannot precisely control

Method used

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  • Structure control method based on shield tunnel lining viscoelasticity fractional derivative model
  • Structure control method based on shield tunnel lining viscoelasticity fractional derivative model
  • Structure control method based on shield tunnel lining viscoelasticity fractional derivative model

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Embodiment

[0069] The structural control method based on the viscoelastic fractional derivative model of shield tunnel lining is characterized in that it includes the following steps:

[0070] (1) Soil control: collect the inner diameter, outer diameter and thickness of the lining, and obtain the relationship between the displacement of the soil under dynamic load and the radial stress of the soil according to the theory of viscoelasticity;

[0071] The displacement and stress of the described soil under the dynamic load are calculated by the following method:

[0072] There is an infinitely long deep-buried circular tunnel in infinite viscoelastic soil, and the inner and outer diameters of the lining are R 1 and R 2 , the lining thickness is d=R 2 -R 1 ;Lining inner boundary action-radial uniform axisymmetric simple harmonic load with circular frequency ω , is an imaginary unit; it can be seen from the geometric and physical characteristics that it can be regarded as an axisymmet...

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Abstract

The invention relates to a structure control method based on a shield tunnel lining viscoelasticity fractional derivative model. The method comprises the following steps that (1) a soil body is controlled, wherein the inner diameter, the outer diameter and the thickness value of a lining are collected, and the relation of the displacement of the soil body under the action of power loads and the radial stress of the soil body is obtained according to a viscoelasticity principle; (2) the lining is controlled, wherein the radial stress and the circumferential stress, the radial displacement and the material density of the lining are detected, and the relation of the stress and the displacement of the lining is calculated through the fractional derivative model; (3) a boundary condition is controlled, wherein the lining and the soil body are set to be in complete and close contact, that is, continuous displacement and stress is met, the relations of the displacement and the stress obtained in the step (1) and the step (2) are combined, the relation of the stress and the displacement of the viscoelasticity soil body and the lining is obtained, and control over the shield tunnel lining is achieved by controlling soil body damping, the thickness of the lining and materials. Compared with the prior art, the structure control method has the advantages of being small in computing amount, strong in interference restraining capacity, stable in adjustment, high in adjusting precision and the like.

Description

technical field [0001] The invention relates to a structure control method based on a viscoelastic fractional derivative model of shield tunnel lining. Background technique [0002] The deformation of the soil caused by the dynamic load in the lining is one of the hotspots in the geotechnical field, and it has been widely used in projects such as underground railways, oil pipelines, and submarine tunnels. The existing control methods include: 1. Considering the lining as an elastic thin-walled shell structure, using the weighted residual method and using the Laplace transform technology and displacement potential function, the transient state of cylindrical holes in infinite elastic media is studied. In response to the solution, numerical results are discussed for the three mode conditions of instantaneous, translational and minimal leaves. 2. The dynamic response of elastic concrete lining structure in infinite porous elastic saturated soil is studied by using boundary ele...

Claims

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Application Information

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IPC IPC(8): E21D11/00
Inventor 张斌张亮肖俊晔欧阳煜
Owner STATE GRID CORP OF CHINA
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