A dynamic optimization method for large area pipeline repair in post-disaster water supply system

Abstract

The present invention provides a dynamic optimization method for repairing large-area pipelines in a post-disaster water supply system, including the steps of: determining the decision variable at the beginning of the repair; determining the repair operation set of all damaged pipes at the time; calculating the optimal repair plan at the time; The network pressure-driven model simulates the repair operation; updates the decision variables; judges whether new damaged pipelines appear in the updated decision variables, and repeats the above process until all damaged components are repaired. The invention is an important supplement to the research field of post-disaster water supply pipe network restoration, provides important technical support for rapid response and repair of post-disaster water supply pipe network, and has good promotion and practical engineering application value.

Description

technical field [0001] The invention relates to the fields of municipal engineering and urban water supply pipe network. Background technique [0002] Natural disasters such as earthquakes, typhoons and floods can wreak havoc on water systems and cause disruptions for days or even months. Therefore, it is of great significance to improve the post-disaster response and recovery capabilities of the water supply network, that is, to improve the resilience of the water supply system under natural disasters. [0003] Resilience was initially defined as the expected time for the water supply system to restore normal water supply capacity after a disaster. After decades of continuous research by scholars, more indicators and parameters have been added to become more scientific and comprehensive. At the same time, scholars have done a lot of research on the toughness of water supply systems under different working conditions. From the analysis of damage to a single pipeline, it ha...

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Problems solved by technology

[0004] However, the above studies mainly focus on the assessment and analysis of the resilience of the water supply system, and there are very few studies on how to improve the resilience of the water supply system by optimizing the post-disaster restoration plan

In addition to the complex destructive effects of natural disasters on water supply systems, post-disaster repairs are often severely limited

This is because: (i) the resources available to restore water service (e.g. the number of maintenance teams) are limited and thus need to be allocated optimally; (ii) user priorities are different, e.g. critical infrastructure has higher Priority; (iii) The hydraulic conditions of the water supply system are complex, and the repair of some pipelines may significantly affect the hydraulic status of other pipelines (for example, when repairing a certain pipeline, it may cause the flow or pressure of other leaking pipelines to increase and cause the pipe to burst)

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