摘要
为研究砂土场地强夯振动规律,减少强夯对周边环境的影响,在某深厚粉细砂场地进行8000kN·m强夯试验,并进行强夯振动监测,分析强夯振动随测点距离的衰减变化规律和随楼层的衰减变化规律,确定了8000kN·m能级强夯安全施工距离,并对隔振沟隔振效果进行振动监测.根据试验数据进行非线性拟合,得到三向合振速随距离、楼层的变化规律,在夯点处,垂向振速最大,随着距夯点距离的增加,环向振速最大,在该深厚粉细砂场地8000kN·m能级强夯振动下的安全施工距离为220m;在不同楼层处,环向振速最大,在安全施工距离内,相比于框架结构,强夯振动对砖混结构的影响较大.
In order to study the law of dynamic compaction vibration in sandy soil site and reduce the impact of dynamic compaction on the surrounding environment,dynamic compaction test of 8 000 kN·m was conducted in deep silty sand site,and dynamic compaction vibration data was monitored.Analyze the variation regularity with the distance of measuring point under the dynamic compaction vibration and the variation regularity with the floor,determine the safe construction distance.According to the experimental data,the nonlinear fitting was carried out,test the effect of the vibration isolation.The nonlinear fitting is performed to get the change rule of three-way combined vibration with distance and floor.The results show that when the vibration velocity changes with the distance,the initial maximum vibration velocity is largest vertically,the safety distance of this deep silty sand site under dynamic compaction vibration of 8 000 kN·m is 220 m;when the distance is farther,the ring vibration speed is the largest.At different floors,the circumferential vibration velocity is the largest.In the safe construction distance,the strong vibration has a greater influence on the brick-concrete structure than the frame structure.
作者
时伟
邵琪琳
董炳寅
胡瑞庚
SHI Wei;SHAO Qilin;DONG Bingyin;HU Ruigeng(School of Civil Engineering,Qingdao University of Technological,Qingdao 266033,China;China Zhong-hua Geotechnical Engineering Co.Ltd,Keyuan Road 13,Beijing 102600,China;School of Environmental Science and Engineering,Ocean University of China,Qingdao 266003,China)
出处
《西安建筑科技大学学报（自然科学版）》
北大核心
2019年第3期309-314,共6页
Journal of Xi'an University of Architecture & Technology(Natural Science Edition)
基金
山东省住房和城乡建设厅研究开发基金项目(2016-02-1)
关键词
强夯
振动监测
深厚粉细砂
衰减规律
安全距离
dynamic compaction
vibration monitoring
deep silty sand
attenuation law
safe distance
