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沈海高速公路泉州-厦门段扩建工程中隧道部份均采用小净距布置型式,隧道爆破将对既有隧道的围岩,尤其是对中夹岩稳定性造成较大的影响。为确定合理的爆破装药量以确保临近隧道围岩在爆破振动时的稳定性,通过现场监测,得到了软弱围岩中隧道爆破围岩的振动速度历时曲线和爆破地震波在小净距隧道中夹岩中的传播规律,并提出了确保工程稳定的合理装药量,研究成果为工程的设计与施工提供了科学依据。
The part of tunnel in Quanzhou-Xiamen section expansion project of Shenhai Expressway adopts the layout of small spacing, and the tunnel blasting will have a great impact on the surrounding rock of the existing tunnel, especially the stability of the middle rock. In order to determine the reasonable blasting charge to ensure the stability of tunnel surrounding rock during blasting vibration, the vibration velocity curves of blasting surrounding rock in soft surrounding rock and the blasting seismic wave are obtained in the tunnel with small clear distance The law of propagation in the rock and the reasonable charge of the project to ensure the stability of the project. The research results provide a scientific basis for the design and construction of the project.