Abstract
Most of the existing sluices in China have been in operation for more than 40 years, and the aging problem is becoming increasingly prominent. The selection of reinforcement schemes for sluices in vulnerable conditions is of great significance to the whole project. A reasonable reinforcement scheme can ensure their safe operation and reduce unnecessary resource investment. This study focuses on the diversion gate of a bridge in China that through aging has emerged insufficient capacity of downstream energy dissipation and scour prevention, severe scour of the diversion dike foundation, and insufficient flood control and rescue capacity. Two reinforcement schemes are examined by analyzing the engineering parameters of the bridge diversion sluice and the necessity of engineering construction, namely, raising the flood discharge level and increasing the width of the overflow section. In this study, Super Decisions software was first used to simulate the reinforcement scheme of the bridge diversion sluice, calculate the weight of the factors, and obtain the optimization scheme from the two aforementioned reinforcement schemes, which was based on the analytic network process (ANP), and the related factors affecting the reinforcement scheme of the bridge diversion sluice are determined and evaluated. The relevant calculation and analyses of the optimization scheme are conducted using ANSYS finite‐element software. The selection process of reinforcement scheme for such sluices provides a reference for other similar projects.
Highlights
During the 1960s and 1970s, many sluices were built in China in a wave of water conservancy construction projects
After the aforementioned steps were completed, the global weights were generated, and the final weights were obtained, as shown in Figure 2. e scheme was regarded as an optimization scheme, and the evaluation set of its factors is W {excellent, good, pass, fail}. e bridge sluice risk elimination and reinforcement program evaluation was conducted through a questionnaire survey distributed to seven evaluation experts and three designers
The analytic network process (ANP) is used to construct the scheme comparison model of the diversion sluice reinforcement project of the bridge. e conclusions that can be drawn are as follows: First of all, by conducting a questionnaire survey, the important factors and their effects on the selection of a scheme for reinforcement of the bridge diversion sluice are determined. e weights of the factors affecting the scheme comparison were calculated by Super Decisions software
Summary
During the 1960s and 1970s, many sluices were built in China in a wave of water conservancy construction projects. Many of these sluices do not meet the current standard requirements owing to technological limitations at the time of construction. In addition to the aforementioned effects, the main risks of such sluices in China are associated with insufficient flood control standards, damages to the energy dissipation mechanism and antishock features, poor stability of the sluice chamber, failure to meet the requirements of current antiseismic design codes, and other factors [2, 3]. There is no scientific, mature, and widely applicable theoretical method to evaluate the safety and reinforcement scheme of sluices that have been in operation for many years. Some scholars have deeply discussed and studied the application technology of safety evaluation, such as dynamic
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