2012年10月上施工技术 第41卷第374期CONSTRUCTION TECHNOLOGY19
深层冲击成孔振动环境影响分析
黄俊'，张波² （1．北京工业大学城市与工程安全减灾教育部重点实验室，北京100124； 2.北京城建勘测设计研究院有限责任公司，北京100101）
[摘要】对郑州中心城区某场地胶结层冲击钻孔施工进行现场监测，监测内容主要有地表加速度、深部土层加速度 及土层的分层沉降。
对深层沉降及地表振动频谱进行分析，得出现场施工对淤泥质粉质黏土的扰动程度及地表振 动规律，并合理评价冲击振动对周边环境影响。
研究表明：冲击产生的振动在地表和地层内部衰减较快。
测得的 振动主频范围均在中高频端，冲击振动的波动在主频未能与建筑产生低阶共振，对建筑物的影响有限，地表沉降主 要由软弱层振陷引起，建筑物差异沉降小于规范要求。
[关键词】地下工程；冲击钻孔；振动；衰减规律；现场试验；监测；沉降 [中图分类号]TU753.3［文献标识码】A[文章编号】1002-8498（2012）19-0019-04 Environmental Impact Analysis of Vibration Induced by Deep Percussion Drilling Huang Jun', Zhang Bo² (1. The Key Laboratory of Urban Security and Disaster Engineering, Ministry of Education, Beijing University of Technology, Beijing 100124, China ; 2. Beijing Urban Construction Exploration & Surveying Design Research Institute Co. , Ltd. , Beijing 100101 , China)
Abstract :For a project in central Zhengzhou, the process of percussion drilling on deep glued layer was monitored. The major monitoring parameters included surface acceleration , deep layered acceleration and layered settlement. Based on analysis of layered settlements and surface vibration spectrum, conclusions were drawn regarding the principles of surface vibration and the degree of disturbance to mucky silty clay caused by the drilling process. The environmental impact induced by drilling construction was properly evaluated. This study shows that vibration caused by drilling decreases rapidly in surface and formation. The measured vibration frequencies are mainly in high-frequency side. Vibration caused by drilling did not resonate with building, and hence the impact on building was limited. Ground settlements were mainly caused by vibration-subsidence of soft layers. Differential settlement of the building is less than the regulatory requirements. Key words:underground; percussion drilling; vibrations; attenuation law ; tests; monitoring; settlement
冲击荷载产生的振动波从振源四周径向传播，的振动规律及振动对环境的影响。
空间高度方向及地表的影响都很大，传播距离本文针对郑州城区某场地进行的冲击钻孔施 远1。
振动对环境影响主要体现在:动荷载对...
