陈建峰,姚宇昂,张菊连,等. 2021. 钢板桩施工振动现场监测分析[J]. 工程地质学报,29(1):222-228. doi:10.13544/j.cnki.jeg.2020-552. DOI: 10.13544/j.cnki.jeg.2020-552
    引用本文: 陈建峰,姚宇昂,张菊连,等. 2021. 钢板桩施工振动现场监测分析[J]. 工程地质学报,29(1):222-228. doi:10.13544/j.cnki.jeg.2020-552. DOI: 10.13544/j.cnki.jeg.2020-552
    Chen Jianfeng, Yao Yu'ang, Zhang Julian, et al. 2021. Analysis of on-site vibration monitoring of steel sheet pile driving construction[J]. Journal of Engineering Geology, 29(1): 222-228. doi: 10.13544/j.cnki.jeg.2020-552.
    Citation: Chen Jianfeng, Yao Yu'ang, Zhang Julian, et al. 2021. Analysis of on-site vibration monitoring of steel sheet pile driving construction[J]. Journal of Engineering Geology, 29(1): 222-228. doi: 10.13544/j.cnki.jeg.2020-552.

    钢板桩施工振动现场监测分析

    ANALYSIS OF ON-SITE VIBRATION MONITORING OF STEEL SHEET PILE DRIVING CONSTRUCTION

    • 摘要: 本文采用自主设计的地面振动加速度监测系统对3个不同土性场地的钢板桩施工进行了现场监测,分析了钢板桩施工过程中的地面振动峰值加速度和振动频率特性,并探讨了振动衰减规律及对周边建筑物的影响。研究结果表明:土的强度对钢板桩施工振动的影响显著,钢板桩在低阻力土体中的贯入速率快,地面振动响应弱,而在高阻力的土体中贯入速率慢,地面振动相对大很多;钢板桩施工引起的地面径向和切向加速度在同一深度比较接近,且随着深度的增加有增大的趋势;振源距离和土性对钢板桩施工引起的地面振动主频率影响不大,地面振动主频率与桩锤施工频率之间呈较好的线性正相关关系;钢板桩施工振动在距振源4 m范围内衰减迅速,其施工对周围建筑物的最小安全距离要远小于挤土型桩基的施工。

       

      Abstract: In this paper, the self-designed system for ground vibration acceleration monitoring was used to monitor the ground vibration caused by steel sheet pile driving in three sites with different soil properties. The peak acceleration and frequency characteristics of ground vibration were analyzed. The vibration attenuation law and the influence on surrounding buildings were discussed. The results show that soil strength has significant influence on the vibration caused by steel sheet pile construction. The penetration rate of steel sheet pile in soil with low resistance is high, causing slight ground vibration response. While in soil with high resistance, the penetration rate is low and the ground vibration is relatively much more obvious. The ground longitudinal and tangential accelerations caused by steel sheet pile construction are close to each other at the same depth, and have a trend to increase with the depth. There is little influence of vibration source distance and soil property on the dominant frequency of ground vibration caused by steel sheet pile construction. A good positive linear correlation shows between the dominant frequency of ground vibration and the vibration frequency of pile construction. The construction vibration of steel sheet pile attenuates rapidly in the range of 4m from the vibration source. The minimum safety distance of steel sheet piles for surrounding buildings due to construction is far smaller than that of soil compaction pile.

       

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