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A safety detection method for a buried pipeline structure and a safety evaluation method for a buried pipeline structure

A technology for buried pipelines and safety detection, applied in the directions of instrumentation, design optimization/simulation, calculation, etc., can solve the problems of low reliability, difficult lateral soil stiffness, hidden dangers of safe operation of pipelines, etc., to achieve accurate control and easy maintenance. or the effect of replacement

Inactive Publication Date: 2020-02-21
CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, it is difficult to directly measure the stiffness of the pipe side soil, and its value is mainly based on experience, with low reliability, which brings hidden dangers to the actual safe operation of the pipeline.

Method used

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  • A safety detection method for a buried pipeline structure and a safety evaluation method for a buried pipeline structure
  • A safety detection method for a buried pipeline structure and a safety evaluation method for a buried pipeline structure
  • A safety detection method for a buried pipeline structure and a safety evaluation method for a buried pipeline structure

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Experimental program
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Embodiment

[0054] This embodiment provides a buried pipeline structure safety detection method, including:

[0055] 1. Use a laser section scanner in the lumen of the buried pipeline to collect the coordinates of n detection points located on the inner wall of the buried pipeline. The coordinates of each detection point are:

[0056] where x i is the abscissa of the i-th detection point; z i is the ordinate of the i-th detection point; d i is the distance from the i-th detection point to the rotation center; θ i It is the rotation angle of the i-th detection point with the rotation center as the origin and the horizontal axis set along the horizontal direction; both i and n are positive integers and i is less than or equal to n.

[0057] 2. Bring the coordinates of each detection point into the ellipse standard equation Ax 2 +Bz 2 +Cx+Dz+E=0 to perform data fitting to obtain the first fitting equation. The length of the horizontal axis of the first fitting equation is 2a, and th...

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Abstract

The invention discloses a buried pipeline structure safety detection method and a buried pipeline structure safety evaluation method, relates to the technical field of buried pipeline detection. The buried pipeline structure safety detection method comprises the following steps of: taking vertical displacement and horizontal displacement of a detection point as forcible displacement boundary conditions, calculating pipeline internal force by using a finite element analysis method, and carrying out repeated measurement to determine an internal force variable coefficient; and calculating pipeline safety reliability by utilizing a formula (as shown in the specification). The buried pipeline structure safety evaluation method comprises a step of evaluating the structure safety of buried pipelines by utilizing the safety reliability obtained through the buried pipeline structure safety detection method. If the value of the safety reliability is higher, the structures of the buried pipelines are safer. Both the two methods can really reflect the structure condition of the buried pipelines, are convenient to maintain and change the buried pipelines, and can grasp the safety conditions of the buried pipelines more easily and correctly.

Description

technical field [0001] The invention relates to the technical field of buried pipeline detection, in particular to a buried pipeline structure safety detection method and a buried pipeline structure safety evaluation method. Background technique [0002] The basis for the normal operation of buried pipelines, especially flexible buried pipelines, is the joint action of pipe and soil. The stiffness of the soil on the side of the pipe is a key technical index for the design and safety assessment of the pipe structure. However, it is difficult to directly measure the stiffness of the pipe side soil, and its value is mainly based on experience, with low reliability, which brings hidden dangers to the actual safe operation of the pipeline. Therefore, it is necessary to propose a structural safety evaluation method that can avoid this difficulty and has higher accuracy to ensure the safety of pipeline transportation. Contents of the invention [0003] The object of the present...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/23
CPCG06F30/23G06F2113/14
Inventor 朱新民商峰金可礼黄涛汪劲松罗雄杰冯少孔刘亦兵崔炜李良庚邓检强陈立林彭冬聂鼎范哲陈峰杨璐菲王恒吕航
Owner CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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