摘要
为研究高频振动沉桩对人的影响,依托云南省昆明滇池国际会展中心4号地块项目钢管桩高频振动沉桩工程实例,通过勘察,室内土工试验,基于Midas GTS NX建立三维有限元模型.从激振频率、偏心距和土层情况3个方面入手,对高频振动沉桩对人的环境影响进行研究.研究结果表明:针对普通振动锤,振动沉桩对人的环境影响随着激振频率的增大而增大;针对无级调频调矩振动锤,振动沉桩对人的环境影响随着激振频率的增大而减小;在满足工程要求的情况下减小振动锤的偏心距,有利于减小振动沉桩对人的影响;钢管桩振动沉桩在泥炭质土中施工对人的环境影响最大.最后,提出一种能有效降低振动沉桩对周边人的环境影响方案.
In order to study the influence of high-frequency vibration pile driving, based on the example of high-frequency vibration pile-sinking of steel pipe piles in No. 4 plot of Kunming Dianchi International Convention and Exhibition Center, Yunnan Province, a three-dimensional finite element model is established based on Midas GTS NX through on-site investigations and indoor geotechnical tests. Starting from the three aspects of excitation frequency, eccentricity and soil condition, the environmental impact of high frequency vibration pile-sinking on the surrounding residents is studied. Results show that the environmental impact of vibration driven pile on the surrounding residents increases with the increase of excitation frequency for common vibrating hammer. Vibration hammer with stepless frequency and torque modulation, the environmental impact of vibration driven pile on the surrounding residents decreases with the increase of excitation frequency. The eccentricity of the vibrating hammer is reduced when the engineering requirement is satisfied. It is beneficial to reduce the impact of vibration pile sinking on the nearby residents. The construction of vibrating steel pipe pile in peat soil has the greatest impact on human environment. Finally, according to the results of parameter analysis, this paper presents a method to effectively reduce the impact of vibration pile sinking on human environment.
作者
赵一锦
谢建斌
时林丰
王卓蕾
陆子豪
ZHAO Yijin;XIE Jianbin;SHI Linfeng;WANG Zhuolei;LU Zihao(School of Architecture and Planning,Yunnan University,Kunming 650500,China;Kunming Junlong Geotechnical Engineering Co.,Ltd.,Kunming 650021,China)
出处
《湖南科技大学学报（自然科学版）》
CAS
北大核心
2022年第3期35-43,共9页
Journal of Hunan University of Science And Technology：Natural Science Edition
基金
国家自然科学基金资助项目(11862024)
云南省教育厅科学研究基金资助项目(2019Y0020)。
关键词
高频振动沉桩
有限元
参数分析
环境影响
high-frequency vibration pile-driving
finite element
parametric analysis
environment impact
