输电杆塔基础承载力可靠性评价方法研究  

Study on the evaluation system of transmission tower foundation safety reliability

作　　者：伍林伟 冯衡 王松涛 曾二贤 徐彬 李扬 刘威 严泽华 张耀庭[3] WU Linwei;FENG Heng;WANG Songtao;ZENG Erxian;XU Bin;LI Yang;LIU Wei;YAN Zehua;ZHANG Yaoting(Central Southern China Electric Power Design Institute of China Power Engineering Consulting Group Corporation,Wuhan 430071,China;School of Civil Engineering and Architecture,Hubei University of Technology,Wuhan 430068,China;School of Civil and Hydraulic Engineering,Huazhong University of Science and Technology,Wuhan 430074,China)

机构地区：[1]中国电力工程顾问集团中南电力设计有限公司,武汉430071 [2]湖北工业大学土木建筑与环境学院,武汉430068 [3]华中科技大学土木与水利工程学院,武汉430074

出　　处：《安全与环境学报》2023年第12期4230-4238,共9页Journal of Safety and Environment

基　　金：中南电力设计院有限公司重大专项(40-1A-KY202019-T201);湖北省科技厅自然科学基金项目(2020CFB860)。

摘　　要：为了对既有输电杆塔基础的检测评估及鉴定提供定量依据,以输电杆塔基础承载力可靠度分析为基础,提出一种新的输电杆塔基础承载力可靠性模糊综合评价方法。首先,分析检测指标对输电杆塔基础承载力可靠度的敏感性,探讨检测指标对输电杆塔基础承载力可靠性影响的权重系数取值;其次,开展输电杆塔基础承载力退化与其相应可靠度衰减的相关性分析,探讨输电杆塔基础承载力可靠性评价等级标准;最后,针对某输电杆塔基础工程检测案例,应用所提出可靠性评价方法进行等级评价。结果表明:通常基础混凝土尺寸和强度对输电杆塔基础承载力可靠度的敏感性影响最为显著,并据此分别构建掏挖基础、阶梯基础、大板基础对应不同检测指标的可靠度影响权重系数矩阵;输电杆塔基础承载力可靠度退化程度与其评定等级存在显著关联,并据此得出模糊评价得分的取值范围与相应评价等级的对应关系。In view of the lack of a quantitative basis for the inspection,evaluation,and identification of existing transmission tower foundations,a new fuzzy comprehensive evaluation method for the reliability of transmission tower foundation bearing capacity is proposed based on the reliability analysis of transmission tower foundation bearing capacity.By analyzing the sensitivity of the attenuation of the detection index to the reliability of the bearing capacity of the transmission tower foundation,the sensitivity coefficient and the attenuation influence coefficient are defined.The slope of the stability section of the reliability attenuation curve is used to characterize the impact of the detection index on the reliability attenuation.The field detection data are connected with the reliability evaluation model,and the factor weight coefficient matrix of the reliability evaluation model of the transmission tower foundation bearing capacity is established.Through the correlation analysis of the degradation of the bearing capacity of the transmission tower foundation and its corresponding reliability attenuation,the state space for the reliability evaluation of the transmission tower foundation is established and improved,and the V value is defined for the reliability rating.According to the reliability rating results,the scope of the corresponding structural bearing capacity decline and the structural maintenance treatment suggestions are given.Through a large number of examples,the reliability of the factor weight coefficient matrix and the evaluation state space of the model is verified,which effectively reduces the deviation of the reliability evaluation results caused by the expert experience method.Using the established reliability evaluation method of transmission tower foundation bearing capacity,the reliability of a transmission tower foundation bearing capacity is rated to verify the rationality of the proposed evaluation method.

关 键 词：安全工程 输电杆塔基础 模糊综合评价 承载力可靠度 敏感性分析 

分 类 号：X935[环境科学与工程—安全科学]