硬质岩层盾构掘进引起国保单位白塔振动预测与控制技术  

Prediction and control of vibrations induced by shield tunneling in hard rock strata for conservation of White Tower

作　　者：蔡袁强[1] 谢况琴 袁宗浩 孙宏磊 黄勇 曹秒凤 曹志刚[3] 梁旭 CAI Yuanqiang;XIE Kuangqin;YUAN Zonghao;SUN Honglei;HUANG Yong;CAO Miaofeng;CAO Zhigang;LIANG Xu(College of Civil Engineering,Zhejiang University of Technology,Hangzhou 310023,China;Power China Huadong Engineering Co.,Ltd.,Hangzhou 311122,China;College of Civil Engineering and Architecture,Zhejiang University,Hangzhou 310058,China;Hangzhou Urban Infrastructure Construction Management Center,Hangzhou 311103,China)

机构地区：[1]浙江工业大学土木工程学院,浙江杭州310023 [2]中国电建集团华东勘测设计研究院有限公司,浙江杭州311122 [3]浙江大学建筑工程学院,浙江杭州310058 [4]杭州市城市基础设施建设管理中心,浙江杭州311103

出　　处：《岩土工程学报》2025年第5期1064-1072,共9页Chinese Journal of Geotechnical Engineering

基　　金：国家自然科学基金项目(52378376,52078462);浙江省高校基本科研业务费项目(RF-B2023007)。

摘　　要：硬质岩层盾构掘进施工引起的环境振动会对邻近文物建筑产生不利影响。针对硬质岩层盾构掘进振源特性复杂和文物保护单位容许振动指标严苛的难题,基于之江路输水管廊隧道近距离侧穿白塔工程,系统介绍了一种基于实测与模拟相结合的振动反分析法,在此基础上开展了硬岩地层盾构掘进引起白塔振动响应预测分析,并分别从盾构施工参数和PVC空心减振屏障两方面进行白塔减隔振技术研究。结论如下:硬质岩层盾构掘进振源主要由盾构掘进过程中的刀盘转动、滚刀切削坚硬岩体诱发;盾构施工参数中掘进速度与振动响应表现出较好的相关性,降低盾构机掘进速度,振动响应全频段显著下降;PVC空心桩对中高频段具有较好的减振效果,在白塔范围内平均减振率可达50%。The environmental vibrations caused by shield tunneling in hard rock strata will have adverse effects on the neighboring cultural heritage buildings.In response to the challenges posed by the complex vibration sources from shield tunneling in hard rock,the stringent vibration criteria for cultural heritage preservation as well as the poor overall structural integrity,a vibration back-analysis method based on the field measurements and finite element method is proposed and is applied in prediction and control technology of the vibrations induced by shield tunneling in hard rock strata for conservation of the White Tower in the water conveyance pipe gallery tunnel project of Zhijiang Road.The vibration isolation effects are also analyzed by researchers focusing on two aspects,namely shield construction parameters and PVC hollow pile barriers.It is concluded that the main vibration source of shield tunneling in hard rock strata is the rotation of the cutter head and the cutting of hard rock by the disc cutters.There is a good correlation between excavation speed and tunneling-induced vibration level.Thus reducing the excavation speed significantly decreases vibration level over the concerned frequency range.The PVC hollow pile has a good vibration reduction effect in the mid-to-high frequency range,with an average vibration reduction rate of up to 50%within the White Tower area.

关 键 词：硬质岩层 盾构掘进 振动反分析 白塔 放大效应 PVC空心桩 

分 类 号：TU435[建筑科学—岩土工程]