温州市南山隧道爆破现场监测与分析

Monitoring and Analysis on Blasting Site of Nanshan Tunnel

温州绕城高速公路北线二期工程南山隧道为分离式长隧道,采用新奥法施工工艺。南山隧道周边高敏感物较多,在洞口及洞内爆破开挖施工过程中,因爆破振动引起附近山体和建筑产生了剪切裂纹和过大的剪切变形累积,对周边敏感物影响较大,因此需对隧道爆破工程进行监测,并对建筑物的影响数据进行采集分析,以减小后期施工过程对周边建筑物造成的危害。

Nanshan Tunnel of Wenzhou Ring Expressway North Line Phase II Project is a separated long tunnel and is constructed by the new Austrian tunneling method.There are many high-sensitivity objects around Nanshan Tunnel.In the process of blasting excavation at the entrance and in the tunnel,the nearby mountains and buildings produce the shear cracks and excessive shear deformation accumulation due to blasting vibration,which has a great impact on the surrounding sensitive objects.Therefore,it is necessary to monitor the blasting engineering of the tunnel,and collect and analyze the impact data of the buildings so as to reduce the damage to the surrounding buildings in the later construction process.