摘要
为明确跨湖区域桥梁施工重难点以更好的指导现场施工,以某城市跨湖区域桥梁工程施工为工程背景,通过选取26个影响因素构建本工程风险评价体系,采用主成分分析法提取六个关键影响因素并选取工作台班累计量Q、桩侧摩阻力标准值qik、整改点数量N、净空高度H、降雨天数T以及安全培训平均得分G六个指标作为评价指标,引用云模型并结合主成分分析对该湖区桥梁施工风险进行综合评价。结果表明:①主成分分析法提取了本工程六个关键影响因素,明确了现场施工作业重点防护区域;②通过综合评价,该区域桥梁施工风险等级隶属于Ⅱ级,处于可接受风险范围,需对重点防护区域采取针对性的预防措施,保障施工安全。
In order to clarify the importance and difficulty of the bridge construction in the lake-crossing area and to better manage the construction site,taking the bridge construction in the lake-crossing area of a city as the engineering background,26 influencing factors are selected to construct the risk assessment system of the project.Six key influencing factors are extracted by principal component analysis,and six indexes are selected as evaluation indexes:bench shift accumulation Q,pile side friction standard value qik,number of rectification points N,clearance height H,rainfall days T and average score G of safety training.Cloud model and principal component analysis are used to comprehensively evaluate the construction risk of bridges in the lake area.The results show that:①The principal component analysis method extracts six key influencing factors of the project and defines the key protection areas of the on-site construction operation;②Through the comprehensive evaluation,the bridge construction risk grade in this area belongs to the second grade and is in the acceptable risk range,so it is necessary to implement targeted preventive measures to the key protection areas to ensure the construction safety.
作者
张天宝
王雪颖
班鹏
陈永
ZHANG Tian-bao;WANG Xue-yin;BAN Peng;CHEN Yong(CCTEB Infrastructure Construction Investment Co.,Ltd.,Wuhan 430073,China;School of Civil and Resource Engineering,University of Science and Technology Beijing,Beijing 100083,China)
出处
《科技和产业》
2020年第10期214-218,共5页
Science Technology and Industry
