深层冲击成孔振动环境影响分析  

Environmental Impact Analysis of Vibration Induced by Deep Percussion Drilling

作　　者：黄俊[1] 张波[2] 

机构地区：[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

出　　处：《施工技术》2012年第10期19-22,共4页Construction Technology

基　　金：国家973项目(2007CB714203);北京市自然科学基金重点项目(8111001)

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。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.

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 

分 类 号：TU753[建筑科学—建筑技术科学]