DUAN Wei, HAN Yun-shan， DONG Yan-li, QIN Wei-hua, WU Han
（Institute of Civil Engineering of School of Science， North University of China， Taiyuan 030051， China）
Abstract： The paper takes a new campus project site of Shanxi university town for example, tests the influence of dynamic compaction vibration and vibration isolation effect of isolation trench on this ground, and compares the influences of the dynamic compaction vibration on surrounding buildings with isolation trench and without it. Furthermore, the attenuation law of dynamic compaction vibration in fill foundation of the loess area under different tamping energy and how to determine safe distance of dynamic compaction construction are studied. And then the quantitative relationship between acceleration and vibration source in new campus project site is presented. We derive the evaluation method that dynamic compaction construction affects adjacent buildings by contrasting with the existing standards and norms. The monitoring results show that isolation trench makes the amplitude attenuation of the horizontal velocity of dynamic compaction vibration reach above 75%, and the safe distance be 30 m under the tamping energy of 6 000 kN·m. Therefore, isolation trench is better for vibration reduction under dynamic compaction construction.
Key words： dynamic compaction； vibration； safety distance； isolation trench； piezoelectric sensor
CLD number： TU758.11Document code： A
Article ID： 1674-8042（2015）02-0116-07 doi： 10.3969/j.issn.1674-8042.2015.02.003
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基于压电式传感器的强夯振动测试分析
段伟， 韩云山， 董彦莉， 秦伟华， 吴晗
（中北大学 理学院 土木工程系， 山西 太原 030051）
摘要:以山西大学城某新校区工程场地为例， 对该场地强夯振动影响以及隔振沟的隔振效果进行了测试， 对比了有无隔振沟工况下强夯振动对周围建筑物的影响， 研究了不同夯击能下强夯振动在黄土地区填方地基中的衰减规律及如何确定强夯施工安全距离， 提出了该场地的加速度和振源距的定量关系。 通过与现有标准、规范的规定进行比较， 分析得出了强夯施工振动对相邻建筑物影响的评价方法。 监测结果表明， 隔振沟在强夯施工中减振效果好， 隔振沟对强夯振动水平速度的衰减幅度高达75%， 且在 6 000 kN·m夯击能下， 强夯安全距离为30 m。
关键词:强夯； 振动； 安全距离； 隔振沟； 压电式传感器
引用格式：DUAN Wei, HAN Yun-shan， DONG Yan-li, et al. Test and analysis of dynamic compaction vibration based on piezoelectric sensor. Journal of Measurement Science and Instrumentation, 2015, 6(2)： 116-122. ［doi： 10.3969／j.issn.1674-8042.2015.02.003］
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