基于集对可拓理论的桥梁深水基础钢板桩围堰安全性评估  

Safety Evaluation of Steel Sheet Pile Cofferdam of Bridge Deep Water Foundation Based on Set Pair Extension Theory

作　　者：郝伟[1] 宋宁宁 李晓钟[1] HAO Wei;SONG Ningning;LI Xiaozhong(School of Civil Engineering,Lanzhou Jiaotong University,Lanzhou 730070,China)

机构地区：[1]兰州交通大学土木工程学院,甘肃兰州730070

出　　处：《安全与环境工程》2023年第4期1-8,共8页Safety and Environmental Engineering

基　　金：甘肃省自然科学基金项目(21JR7RA313)。

摘　　要：为综合评估桥梁深水基础钢板桩围堰的安全状态,先从环境因素、安全管理、施工作用、围堰稳定性及状态监测角度出发,构建桥梁深水基础钢板桩围堰安全性评估指标体系,并利用熵权法计算各评估指标的权重;然后基于集对分析与可拓理论耦合的算法,建立基于集对可拓理论耦合的桥梁深水基础钢板桩围堰安全性评估模型;最后将该评估模型用于中卫下河沿黄河公路大桥16^(#)墩承台钢板桩围堰安全等级的集对可拓联系度分析中,并采用最大隶属度原则确定该桥梁深水基础钢板桩围堰安全等级。结果表明:该桥梁深水基础钢板桩围堰安全等级为黄色等级,安全状况较稳定,但未达到最优等级,应加强日常监测与安全管理。该评估结果与现场情况基本符合,验证了该评估模型的适用性与合理性,可为桥梁深水基础钢板桩围堰安全管理提供依据。In order to comprehensively evaluate the safety status of steel sheet pile cofferdam of bridge deep water foundations,from the perspective of environmental factors,safety management,construction effects,cofferdam stability and state monitoring,a safety evaluation index system for steel sheet pile cofferdam of bridge deep water foundation was constructed,and the entropy weight method was used to calculate the weight of each evaluation index.Then,based on the algorithm of the set pair analysis and extension theory coupling,the set pair extension coupling safety evaluation model of the steel sheet pile cofferdam of bridge deep water foundation was established.Finally,the evaluation model was used in the set-to-extension connection degree analysis of the steel sheet pile cofferdam safety level of the 16^(#) pier cap of the Xiaheyan Yellow River Highway Bridge in Zhongwei,and the maximum membership degree principle was used to determine the steel sheet pile cofferdam safety level.The evaluation results show that the safety level of the steel sheet pile cofferdam is yellow,and the safety status is relatively stable,but it does not reach the optimal level,suggesting that daily monitoring and safety management should be strengthened.The evaluation results are basically consistent with the site conditions,which verifies the applicability and rationality of the evaluation model,and can provide a basis for the safety management of steel sheet pile cofferdam for deep water foundation of bridges.

关 键 词：钢板桩围堰 桥梁深水基础 安全评估 集对可拓 熵权法 

分 类 号：X913[环境科学与工程—安全科学] U447[建筑科学—桥梁与隧道工程]