A Method for Obtaining the Reliability of Pipe Sections in Loess Collapsible Areas

Abstract

The invention discloses a method for obtaining the reliability of a pipe section in a loess collapsible area. The method comprises the following steps: obtaining a suspended span length index of the pipe section positioned in the loess collapsible area, wherein the suspended span length index is used for representing the sending failure rate of the pipe section due to change of the suspended span length; obtaining a property index of the pipe section according to the service life and the use year number of the pipe section; detecting to obtain a collapsible coefficient of the loess collapsible area, and obtaining a collapsible amount index of the pipe section according to the collapsible coefficient, wherein the collapsible amount index is used for representing the failure rate of the pipe section due to change of the collapsible amount of the loess collapsible area; obtaining a protective repair index of the pipe section; obtaining a reliability analysis functional function of the pipe section: a formula as shown in the specification; and obtaining the reliability of the pipe section according to the reliability analysis functional function, wherein Z1 represents the suspended span length index; Z2 represents the product of the collapsible index; Z3 represents the property index; and Z4 represents the protective repair index. By means of the technical scheme, the technical problem that the reliability of the pipe section is incorrect to calculate in the prior art can be solved; and the reliability obtaining accuracy of the pipe section is improved.

Description

technical field [0001] The invention relates to the technical field of transportation of oil and gas pipeline sections, in particular to a method for acquiring reliability of pipeline sections in loess subsidence areas. Background technique [0002] Loess and loess-like soils cover more than 2.5% of the world's continents. my country's loess area is about 640,000 square kilometers, which is the most widely distributed area in the world. It is mainly distributed in the northwest, followed by the North China Plain and the southern part of the northeast. Loess subsidence is a unique geological hazard in my country's loess areas, which seriously threatens the safe operation of long-distance oil and gas pipelines. [0003] GB50025 / 2004 "Code for Construction in Collapsible Loess Areas" stipulates the loess compaction during the construction of pipeline sections in loess areas; Standardization has been carried out, but none of them has proposed a method for calculating the relia...

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Problems solved by technology

[0005] The embodiment of the present invention provides a method for obtaining the reliability of the pipe section in the loess subsidence area, which is used to solve the technical problem of inaccurate calculation of the pipe section reliability in the prior art, and improve the accuracy of obtaining the pipe section reliability

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