Three-dimensional evaluation method for risk of urban gas buried pipe network system

Abstract

The invention discloses a three-dimensional evaluation method for the risk of an urban gas buried pipe network system. The method comprises: determining a basic parameter index in the urban gas buried pipe network system; calculating the failure probability of a leakage hole and individual mortality caused by poisoning or explosion according to the basic parameter index when a leakage accident occurs; calculating a corresponding individual risk value based on the failure probability of the leakage hole and the individual mortality caused by the poisoning or explosion; and drawing a buried pipe individual risk three-dimensional field contour surface based on the calculated individual risk value. The method may superpose multiple risk sources and obtain personal risk values under multiple risk sources.

Description

technical field [0001] The invention relates to the field of risk assessment of gas buried pipeline network systems, in particular to a three-dimensional risk assessment method for city gas buried pipeline network systems. Background technique [0002] The urban gas pipeline network system is an important part of urban infrastructure, and its safe operation is related to the safety of people's lives and property, as well as the overall situation of social stability. With the continuous advancement of urbanization in our country, the living standards of urban residents are also constantly improving, and the application of city gas is becoming more and more extensive. The urban gas pipeline network is like the blood vessels of the human body. While it brings convenience to people's production and life, it is very easy to cause safety accidents due to its flammability, explosion and toxicity. In recent years, due to reasons such as overage service of the gas pipeline network, ...

AI Technical Summary

Problems solved by technology

[0007] At present, in terms of the risk field of urban gas pipeline network leakage and explosion accidents, scholars at home and abroad have shown that they attach great importance to the study of the risk field, but the research on it is still in its infancy, and it is far from being able to form a risk field theory. The main problems are as follows: ( 1) Drawing on the concepts and theories of physical fields such as electric field and magnetic field, and directly applying them to the risk field through analogy analysis, without conducting research on its scientific nature

It is an attempt and innovation to introduce a risk field into an urban gas pipeline network leakage explosion accident. To form a complete risk field theory, it is first necessary to clarify the basic characteristics of the risk field, that is, the field strength, field force and field potential of the risk field. Factors are related, and what is the relationship; in this regard, we can learn from the very mature classical physical field theory, but the current research on the attributes of personal risk and social risk is not yet clear, and we cannot simply use vector or scalar synthesis to carry out risk superposition

At the same time, using experimental research to verify the scientificity of the risk field requires complex explosion tests, which is difficult

(2) There is no research on the superposition principle and propagation law of the risk field

Images