水运工程堆载预压处理地基动力测试应用研究
摘要:地基经过真空堆载预压处理后，其地基承载性状及动力参数特性都产生不同改变，这种变化会对动力基础设计产生较大影响。基于此，结合实际水运工程项目对真空堆载预压处理后旋喷桩复合地基及钻孔灌注桩基础分别进行地基动力测试，通过测试获得地基及桩基模型基础的抗压、抗剪及抗扭的刚度参数、竖向及水平转向的第一振型以及扭转向的阻尼比及参振总质量。依据各项实测数据计算出旋喷桩复合地基及钻孔灌注桩基础底面与静应力有关的振动换算系数，推算出两种不同类型基础的地基抗压、抗剪、抗扭刚度，扭转向阻尼比以及地基竖向和水平回转向第一振型的提高系数。各项实际参数测试计算结果显示，当把两种不同类型地基现场实际获得的地基动力参数用于动力机器基础振动和隔振设计时，应分别根据动力机器基础的实际使用工况换算成设计采用的地基动力参数，以免对基础设计造成偏差。
Abstract:After the foundation is treated by vacuum stacking pre-pressure, the bearing characteristics, dynamic parameters and characteristics of the foundation are abnormal, which has a great impact on the design of dynamic foundation. Combined with the actual water transport engineering project on the vacuum stack pre-pressure treatment of the rotary jet grouting pile composite foundation and bored pile foundation, dynamic tests were conducted to obtain the stiffness parameters of compression, shear and torsion, the first vibration mode of vertical and horizontal steering, the damping ratio of torsional steering and the total vibration mass of the foundation and pile. Based on the measured data, the vibration conversion coefficients related to the static stress on the bottom surface of rotary jet grouting pile composite foundation and bored pile foundation were calculated, and the foundation compression, shear, torsional stiffness, torsional steering damping ratio and the improvement coefficient of the first vibration mode of vertical and horizontal return steering of the foundation were also calculated. The test and calculation results of various actual parameters show that when the foundation dynamic parameters actually obtained on the site of two different types of foundations are used for the vibration and vibration isolation design of power machine foundation, parameters should be converted into the foundation dynamic parameters adopted in the design according to the actual service conditions of power machine foundation, so as to avoid deviation to the foundation design.
中文标题：
水运工程堆载预压处理地基动力测试应用研究
Dynamic Testing Application of Foundation Treated by Preloading in the Water Transport Engineering
作者：
张开伟1, 2,,聂庆科2,李志勇1,齐松松1,魏建明3
Zhang Kaiwei1, 2,,Nie Qingke2,Li Zhiyong1,Qi Songsong1,Wei Jianming3
作者简介:张开伟，男，1982年生，汉族，新疆伊犁人，硕士，正高级工程师，主要从事地基基础检测、工程物探等方面的生产和科研工作。E-mail：229326993@qq.com
通讯地址：
1.河北双诚建筑工程检测有限公司，河北石家庄 050031 2.河北建设勘察研究院有限公司，河北石家庄 050031 3.河北中钢岩土工程勘察有限公司，河北石家庄 050031
1.HebeiShuangchengConstructionEngineeringTestingCo.,Ltd.,Shijiazhuang050031,Hebei,China 2.HebeiResearchInstituteofConstruction&GeotechnicalInvestigationCo.,Ltd.,Shijiazhuang050031,Hebei,China 3.HebeiZhonggangGeotechnicalEngineeringInvestigationCo.,Ltd.,Shijiazhuang050031,Hebei,China
中图分类号:TU 47
doi:10.3969/j.issn.1007-2993.2022.01.006
出版物：岩土工程技术
收稿日期:2020-09-21
刊出日期:2022-02-16
关键词:真空堆载预压地基,旋喷桩复合地基基础,钻孔灌注桩基础,地基动力参数测试,幅频响应曲线
Key words:vacuum preloading,composite foundation of rotary jet grouting pile,bored pile foundation,foundation dynamic parameter test,amplitude frequency response curve
文档包含图片数量：图片(9)张
文档包含表格数量：表格(4)个
参考文献：
[1]GB/T 50269—2015 地基动力特性测试规范[S]. 北京: 中国计划出版社, 2015.
[2]王杰贤. 动力地基与基础[M]. 北京: 科学出版社, 2001.
[3]张开伟,聂庆科,王 亮,等. 桩基模型基础地基动力参数测试应用分析[J]. 工程地球物理学报,2018,15(6):817-825.
[4]张开伟,李志勇,马清洲. 基于地基动力测试中电磁激振器的改进应用研究[J]. 岩土工程技术,2018,32(3):159-163. doi: 10.3969/j.issn.1007-2993.2018.03.012
[5]王 广. 大型汽机基础动力设计参数研究[J]. 武汉大学学报(工学版),2013,46(S1):225-229.
[6]王锡康,李永录. 关于活塞式压缩机基础振动简化计算的讨论[J]. 工业建筑,2014,44(8):118-120,161.
[7]刘志久,尚守平,徐 建. 埋置基础扭转振动的实用化计算与试验的对比[J]. 岩土力学,2011,32(12):3618-3622.
[8]刘建军. 动力机器基础的动刚度研究[D]. 衡阳: 南华大学, 2014.
[9]张志豪,李荣先,盛连成,等. 地基动力特性测试分析与探讨[J]. 土工基础,2013,27(6):126-130.
[10]王 军. 垫层地基与复合地基土动力参数的试验研究[D]. 西安: 西安建筑科技大学, 2006.
[11]SU J B,LUAN S L,ZHANG L M,et al. Partitioned genetic algorithm strategy for optimal sensor placement based on structure features of a high‐piled wharf[J]. Structural Control and Health Monitoring,2018,26(1):e2289.
基金项目：
基金项目:河北建设科技计划项目(2014-014)
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