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钱江隧道由于其特殊地理位置面临涌潮冲击作用,涌潮产生的动载对河床形成冲击将引起隧道结构振动。目前对此振动影响评价尚不明晰。基于隧道结构现场动力测试,得到涌潮作用下隧道结构振动响应。测试结果表明:涌潮主要引起隧道竖向振动,通过与施工环境振动比较,涌潮引起振动加速度峰值小于施工状态下局部竖向振动,不构成影响隧道安全运营的控制因素。
Because of its special geographical location, the Qianjiang Tunnel faces the impact of the tidal surge. The impact of the tidal current generated by the dynamic load on the riverbed will cause the vibration of the tunnel structure. The current vibration evaluation is not yet clear. Based on the on-site dynamic test of the tunnel structure, the tunnel structure vibration response under the tidal bore is obtained. The test results show that the tidal bore mainly causes the vertical vibration of the tunnel. Compared with the vibration of the construction environment, the peak value of the vibration acceleration caused by the gully is smaller than the local vertical vibration under the construction condition, which does not constitute the control factor that affects the tunnel safety operation.