Dynamic optimization method for large-area pipeline repair of post-disaster water supply system

Abstract

The invention provides a dynamic optimization method for large-area pipeline repair of a post-disaster water supply system. The dynamic optimization method comprises the following steps: determining adecision variable at the beginning of repair; determining a repair operation set of all damaged pipelines at the moment; calculating an optimal repair scheme at the moment; a water supply network pressure driving model is used for simulating repairing operation; updating the decision variable; and judging whether a new damaged pipeline appears in the updated decision variable or not, and repeatedly executing the process until all the damaged components are repaired. The method is an important supplement to the field of after-calamity water supply pipe network recovery research, provides an important technical support for rapid response and repair of the after-calamity water supply pipe network, and has good popularization and actual engineering application values.

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 that can last for days or 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 were added to become more scientific and comprehensive. At the same time, scholars have conducted a lot of research on the resilience of water supply systems under different working conditions. From the damage analysis of a single pipe, it...

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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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