【摘要】 结合都-汶高速公路董家山隧道小净距段的实际情况,应用数值模拟方法,对小净距段在爆破荷载作用下的相互影响问题进行了研究。结果表明:在隧道爆破施工中应对迎爆侧进行重点监控,采用合理的开挖和加固方式将有效降低爆破施工对先建隧道的不利影响。研究结论可为类似小净距段隧道的爆破设计、施工及现场监控量测提供参考。更多还原

【Abstract】 Based on the practical situation of small clear distance zone at the Dongjiashan tunnel in the Du–Wen expressway ,the mutual influence of small clear distance tunnel resulted from the blasting construction was studied by means of numerical simulation. Result shows that, reasonable excavation and reinforcement can effectively reduce disadvantages caused by blasting excavation on the pre-constructed tunnel; and the in-site monitor should be focused on the near-blast side. Conclusions can offer helpful reference to blasting control design, blasting excavation and in-site monitor of similar twin tunnels with small distance.更多还原