Method for calculating maximum rotation angle of pipeline under fault action

A calculation method and technology of large turning angle, applied in the field of concrete pipes, can solve the problem of low prediction accuracy of the maximum turning angle of segmented pipes, and achieve the effect of high prediction accuracy

Pending Publication Date: 2022-07-12
XIAN UNIV OF TECH +1
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Problems solved by technology

[0003] The purpose of the present invention is to provide a method for calculating the maximum rotation angle of a pipeline under the action of a fault, whi

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  • Method for calculating maximum rotation angle of pipeline under fault action
  • Method for calculating maximum rotation angle of pipeline under fault action
  • Method for calculating maximum rotation angle of pipeline under fault action

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Embodiment Construction

[0032] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0033] The calculation method of the maximum turning angle of the pipeline under the action of the fault, such as figure 1 shown, including the following steps:

[0034] Step 1. Obtain the geometric size parameters, material parameters, seismic fault parameters and pipeline laying parameters of the PCCP pipeline, and the pipeline includes multiple sections;

[0035] Specifically, the geometric parameters of the pipeline include the length of the PCCP single section, the inner diameter, the thickness of the inner core, the thickness of the steel cylinder, the thickness of the outer core, the thickness of the mortar, the diameter of the steel wire, the spacing between the windings, the width of the joint, the insertion length, the working pressure. The geometric size parameters used in this embodiment are shown in Table 1:

[0036] Table 1 Geo...

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Abstract

The invention discloses a method for calculating a maximum rotation angle of a pipeline under the action of a fault. The method comprises the following steps: acquiring geometric dimension parameters, material parameters, seismic fault parameters and pipeline laying parameters of the pipeline; establishing a pipeline-fault nonlinear finite element model; selecting influence factors of a pipeline joint corner under the action of a normal fault, determining single-factor test schemes according to the influence factors, and calculating a vertical settlement difference between adjacent pipelines in each single-factor test scheme by using the pipeline-fault nonlinear finite element model to obtain a maximum vertical settlement difference in each single-factor test scheme; calculating the maximum joint corner according to the vertical settlement difference between the adjacent pipelines; and selecting main influence factors, performing dimensionless processing on the main influence factors, and determining a maximum joint corner based on the main influence factors. The prediction error within a given range is less than 10%, and the method has high prediction precision.

Description

technical field [0001] The invention belongs to the technical field of concrete pipes, and relates to a method for calculating the maximum rotation angle of pipes under the action of faults. Background technique [0002] Prestressed Concrete Cylinder Pipe (PCCP) has many advantages, such as tensile strength and impermeability of steel pipe, compression resistance and corrosion resistance of concrete pipe, and small angle deflection of semi-rigid joints. Large-diameter, high-pressure, long-distance water diversion projects. An important feature of buried pipelines is that they cover a wide area, but are susceptible to geological hazards. In particular, the permanent ground displacement caused by the fault has a great influence on the pipeline. Under the action of fault dislocation, the segmented pipeline will rotate and translate at the joint to adapt to different fault displacement forms and prevent the pipeline from being damaged by longitudinal bending. However, if the ...

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Application Information

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IPC IPC(8): G06F17/18G06F30/23G06F111/04G06F119/14
CPCG06F30/23G06F17/18G06F2111/04G06F2119/14
Inventor 李炎隆李维妹董鹏王佐荣温立峰李勇张野王璟
Owner XIAN UNIV OF TECH
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