水下钻孔爆破对紧邻建(构)筑物安全性影响研究Influence of Underwater Drilling and Blasting on Adjacent Structure Safety
陈春晖,吴立,赵均文,李波,李红勇,李春军
摘要(Abstract)：
为评估水下钻孔爆破对紧邻建(构)筑物的安全影响,结合万州长江公路大桥防撞设施水下爆破工程,利用ANSYS/LS-DYNA对紧邻建(构)筑物水下钻孔爆破进行了数值模拟研究。对不同起爆方式与减震孔不同充填介质下紧邻建(构)筑物水下钻孔爆破的减震效果进行了对比分析,结合现场爆破振动监测数据,对万州长江公路大桥的结构稳定性进行了判定。结果表明:采用毫秒延期雷管进行分段装药起爆能有效降低爆破地震效应;减震孔介质的不同影响了地震波传递和衰减规律,减震孔采用空气介质充填能更好的减弱爆破引起的振动效应;采用该起爆与减震方式能够保证万州长江公路大桥的安全使用。
关键词(KeyWords)： 安全性;水下钻孔爆破;紧邻建(构)筑物;数值模拟
基金项目(Foundation): 湖北省自然科学基金计划重点项目(2013CFA110)
作者(Author): 陈春晖,吴立,赵均文,李波,李红勇,李春军
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