硬岩地层地铁爆破施工诱发环境振动响应研究  

Study on environmental vibration response induced by underground blasting construction in hard rock stratum

作　　者：刘清楠 陈冰慧 石少刚 刘丽 袁超 LIU Qingnan;CHEN Binghui;SHI Shaogang;LIU Li;YUAN Chao(State Key Laboratory for Geomechanics and Deep Underground Engineering,China University of Mining and Technology,Xuzhou 221116,China;Shandong Rail Transit Survey and Design Institute Co.,Ltd.,Jinan 250014,China;Jilin Jianyuan Design Group Co.,Ltd.,Changchun 130011,China;China Railway Engineering Design and Consulting Group Co.,Ltd.,Beijing 100073,China)

机构地区：[1]中国矿业大学、深部岩土力学与地下工程国家重点实验室,江苏徐州221116 [2]山东轨道交通勘察设计院有限公司,山东济南250014 [3]吉林省建苑设计集团有限公司,吉林长春130011 [4]中铁工程设计咨询集团有限公司,北京100073

出　　处：《山东建筑大学学报》2023年第2期113-119,共7页Journal of Shandong Jianzhu University

基　　金：山东省自然科学基金项目(ZR2020QE269);山东省住房城乡建设科技计划项目(2020-K5-2)。

摘　　要：硬岩地层中,对地铁基坑爆破施工所诱发的环境振动传播规律及有效振动控制措施的研究是降低地铁爆破施工对周围环境影响的重要基础。文章以济南轨道交通某拟建地铁车站隔振工程为研究对象,通过理论分析建立了爆破施工振动对周边建筑物影响安全距离计算模型,得出了硬岩地层爆破施工安全距离预测公式。同时,采用非线性有限元软件MIDAS(迈达斯)对隔振矩形空沟建立二维数值模型。对比文献实测及模型数据,校核有限元模型的有效性。通过分析不同工况模拟的隔振效果值,研究得出矩形隔振空沟尺寸对隔振效果的影响。结果表明:所推导的“硬岩地层爆破施工振动对周边建筑物影响的安全距离”计算模型,可对施工安全距离进行预测及估算,计算方法较为可靠。在硬岩地层,对爆破基坑工程进行隔振工程设计时,增加隔振沟深的隔振效果比增加沟宽更有效,对于一般构筑物,采用沟宽为0.5 m、沟深为2.5 m的矩形空沟比较经济合理。In hard rock stratum,research on the propagation law of environmental vibration induced by underground pit blasting construction and effective vibration control measures is an important basis for reducing the impact of underground blasting construction on the surrounding environment.Taking the vibration isolation project of a proposed subway station in Jinan rail transit as the research object,this paper establishes a calculation model of safety distance affected by blasting vibration on surrounding buildings based on the theoretical analysis,and derives a prediction formula for the safe distance of blasting construction in hard rock stratum.At the same time,a two-dimensional numerical model established for the rectangular vibration isolate ditch is also developed using the non-linear finite element software MIDAS.The validity of the finite element model is checked by comparing the measured data and model data.By analyzing the vibration isolation effect values simulated under different working conditions,the influence of the size of the rectangular vibration isolate ditch on the vibration isolation effect is studied.The results show that the model of"Safety distance of blasting construction vibration on surrounding buildings in hard rock strata"can predict and estimate the construction safety distance,and the calculation method is more reliable.It is more effective to increase the depth of the vibration isolate ditch than to increase the width of the ditch in hard rock stratum when designing the vibration isolation engineering for blasting foundation pit.For general structures,it is more economical and reasonable to adopt a rectangular empty ditch with the width of 0.5 m and the depth of 2.5 m.

关 键 词：硬岩 爆破 隔振空沟 安全距离 数值模拟 

分 类 号：U231.4[交通运输工程—道路与铁道工程] TU473[建筑科学—结构工程]