复杂环境下钢筋混凝土连续梁桥爆破拆除Blasting Demolition of Reinforced Concrete Continuous Beam Bridge in Complex Environment
刘国军,梁锐,杨元兵,藤潇,李春江,杨帅
摘要(Abstract)：
新桥要求在旧桥爆破拆除后的原址提升重建,需重点保护桥梁原有地系梁及以下桩基不受爆破损伤。钢筋混凝土连续梁桥长430 m,整体性好,混凝土标号较高,决定采用由南向北大毫秒延时逐跨坍塌的爆破拆除总体方案。台帽和联系梁采用垂直孔,桥墩采用垂直孔和水平孔相结合的布孔方式,结合跨间大延时起爆技术,并在地系梁以上预留部分桥墩,修筑缓冲挡土墙,爆破部位有效围挡等安全技术措施,成功将桥梁爆破拆除。爆破振动、爆破飞石等有害效应均在控制范围之内,爆后经检测桥梁保留桩基部分未受影响,同时确保了周边建构筑物及设施的安全。
关键词(KeyWords)： 钢筋混凝土桥;爆破拆除;连续梁;复杂环境
基金项目(Foundation): 甘肃省省委组织部人才项目[2019];; 精细爆破技术创新人才培育项目(甘财行[2019]35号)
作者(Author): 刘国军,梁锐,杨元兵,藤潇,李春江,杨帅
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