摘要
目前堤防路面多为混凝土路面,洪水来袭时,在某些特定的时候需要对分蓄洪区堤防快速破口分洪,首先要破除堤防混凝土路面。基于堤防混凝土路面的结构特性,建立三维实体模型,采用SPH-Lagrange耦合算法模拟分析裸露爆破作用下混凝土路面的毁伤效应。实施结果表明,在破口分洪堤段的混凝土路面每隔2 m均匀布置32 mm直径的条形裸露药包,爆炸后可在混凝土路面形成以炸药包为中心的0.6 m口径条形爆坑,同时在路基底面下形成宽度为1.2 m的条形震塌缺口,达到破堤分洪之目的。
Presently, most embankment pavements are built in concrete. While, the concrete pavement may need to be quickly removed before the embankment breaking for the flood diversion in flood storage areas. Thus, the damage effects of bare blasting on the concrete pavement are studied with a three-dimensional numerical model and the SPH-Lagrange coupling algorithm. The simulation results show that 32 mm diameter strip-shape bare explosive charges laid on the con- crete pavement with 2 m spacing could cause 0.6 m width strip-shape blasting pit and 1.2 m width strip-shape collapse notch in the pavement foundation. Therefore, the embankment breaking for flood diversion can be realized.
出处
《水电与新能源》
2017年第8期19-22,共4页
Hydropower and New Energy
关键词
混凝土路面
裸露爆破
毁伤效应
数值模拟
concrete pavement
bare blasting
damage effect
numerical simulation
