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荆溪路部分区段从山体旁边穿过,设计方案是对山体进行开挖,形成路堑。路基开挖宽度为30m,开挖的最大高度12.7m,铁路隧道与道路的水平最近距离约40m。采用ABQUS对爆破的振动响应进行动力分析,结论是:露天浅孔爆破方式进行山体岩石开挖,对列车的安全运营存在隐患。建议禁止大吨位炸药的爆破方式;若采用浅孔爆破,常规的炸药用量也不能满足列车运营的安全需要,可考虑采用更小量炸药的爆破方式。
Jingxi Road, part of the section from the side of the mountain through the design of the mountain excavation, the formation of cutting. The width of subgrade excavation is 30m and the maximum height of excavation is 12.7m. The nearest distance between railway tunnel and road is about 40m. The dynamic analysis of the vibration response of blasting by ABQUS is carried out. The conclusion is that the open pit shallow hole blasting method can excavate the mountain rock, which has hidden danger to the safe operation of the train. It is suggested to prohibit the blasting of large tonnage explosives. If shallow hole blasting is used, the conventional amount of explosives can not meet the safety requirements of train operation. A smaller amount of explosives may be considered for blasting.