摘要
Abstract
Based on the foundation construction of the Beijiang Bridge project in the Qinghua Expressway project,this paper uses the LEC evaluation method to evaluate the risk factors based on the major safety hazards existing in the project,divides the risk size and risk level of the construction operating conditions,and based on the key factors resulting in significant risk levels obtained from the risk assessment,key treatment technologies for oblique rocks and large-scale karst caves in the pile foundation construction of the 4#main tower are proposed.The research shows that:The LEC method assessed five potential hazard factors that lead to significant hazard levels,which may lead to major accidents such as collapse,equipment damage,and personal injury;for the karst cave,the steel casing follow-up method,backfilling of rubble clay(concrete),and grouting can be adopted.As regards pretreatment method,this study adopts a"one-piece plan"to formulate targeted karst cave treatment methods,and the anticlotic rock can be treated with backfilling concrete.关键词
LEC评价法/风险评估/溶洞桩基施工/桥梁工程/危害级别Key words
LEC evaluation method/risk assessment/cave pile foundation construction/bridge engineering/hazard level分类
交通工程
