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新建隧道与既有隧道会因为其距离较近导致新建隧道开挖爆破产生的地震波危及既有隧道衬砌结构的安全和稳定。本文根据隧道爆破振动影响控制标准,分析了隧道爆破振动强度的影响因素,提出了降低爆破振动的技术措施,使新建隧道开挖施工爆破中的既有隧道振动速度值控制在安全范围以内,确保隧道开挖作业安全、顺利地进行。可为今后类似工程的设计与施工提供参考与借鉴。
The new tunnel and the existing tunnel will cause the seismic wave generated by the blasting of the new tunnel to endanger the safety and stability of the existing tunnel lining structure because of its close distance. According to the control standard of tunnel blasting vibration effect, the paper analyzes the influencing factors of tunnel blasting vibration strength, puts forward the technical measures to reduce blasting vibration, and controls the existing tunnel vibration velocity value within the scope of safety within the new tunnel blasting construction, Tunnel excavation work safely and smoothly. It can provide reference and reference for the design and construction of similar projects in the future.