预应力管桩动测承载力数值分析及参数取值研究

PDF(1595 KB)

振动与冲击 ›› 2021, Vol. 40 ›› Issue (5) : 266-275.

论文

陈荣保1，2，张季超1，陈泽宇1，顾美湘1

作者信息 +

Numerical analysis and parameter selection of dynamic load-bearing capacity of prestressed pipe pile

CHEN Rongbao1，2, ZHANG Jichao1, CHEN Zeyu1, GU Meixiang1

Author information +

文章历史 +

摘要

在基桩动测承载力计算时，桩周土动力参数取值未考虑与其埋深的关系、各土层阻尼系数和最大弹性变形值未根据土层性质分别取值进行计算，这与实际情况不相符合。为了使基桩动测承载力计算结果更接近实际情况，通过桩周土动三轴试验，分析动力参数取值与其土层埋深的关系；在Bowles方法的基础上，各土层采用不同阻尼系数，以及各土层采用不同最大弹性变形值，对该分析方法进行改进；通过对典型泥质粉砂岩持力层的12根试验桩进行极限荷载试验，验证和修正该数值计算方法。研究结果表明土层分布尤其是较浅部土层分布对锤击桩时土动力学响应影响较大；改进方法计算基桩动测承载力更为合理。

Abstract

In the calculation of the dynamic bearing capacity of the foundation pile, the relationship between the dynamic parameters of the soil around the pile and its buried depth is not considered, and the damping coefficient and the maximum elastic deformation value of each soil layer are not calculated according to the properties of the soil layer, which is not consistent with the actual situation. In order to make the calculation results of dynamic bearing capacity of foundation piles closer to the actual situation, the relationship between dynamic parameters and buried depth of soil layer is analyzed through dynamic tri-axial test of soil around piles. Based on Bowles method, different damping coefficients and different maximum elastic deformation value of soil layer are adopted to improve the analysis method. Twelve test piles were tested under ultimate load on typical argillaceous siltstone bearing stratum to verify and revise the numerical calculation method. The results show that the distribution of soil layers, especially shallow soil layers, has a great influence on the dynamic response of soil when hammering piles; the improved method is more reasonable in calculating the dynamic bearing capacity of foundation piles.

导出引用

陈荣保1，2，张季超1，陈泽宇1，顾美湘1. 预应力管桩动测承载力数值分析及参数取值研究[J]. 振动与冲击, 2021, 40(5): 266-275

CHEN Rongbao1，2, ZHANG Jichao1, CHEN Zeyu1, GU Meixiang1. Numerical analysis and parameter selection of dynamic load-bearing capacity of prestressed pipe pile[J]. Journal of Vibration and Shock, 2021, 40(5): 266-275

参考文献

[1] Bowles J E. 基础工程结构分析及程序[M]. 胡人礼译. 北京：中国铁道出版社，1982:244-269.
Bowles J E. Structure analysis and program of foundation engineering [M]. Translated by Hu Renli. Beijing: China Railway Press, 1982. 244–269.
[2] Bowles J E. Foundation analysis and design [M]. New York: McGraw-Hill Companies Inc, 1996: 968-1005.
[3] Liang R, and Yang, L. Dynamic pile testing technology : validation and implementation [M]. Final Report, Akron University, Dept. of Transportation, Columbus, Ohio, 2007.
[4] 陈久照，温振统，李廷，等. 高应变动力试桩中重锤-桩-岩土冲击响应的理论研究[J]. 土木工程学报，2007，40（5）：53-60.
Chen Jiuzhao, Wen Zhentong, Li Ting, et al. A theoretical study on the impulse response of hammer-pile-soil system in high strain dynamic pile test [J]. China Civil Engineering Journal, 2007, 40(5): 53-60.
[5] Svinkin M R. Engineering aspects in evaluation of pile capacity by dynamic Testing [J]. Structures Congress, 2011: 1686-1697.
[6] 杨志琛. 基桩高应变动力检测试验参数的研究[D]. 济南：山东建筑大学，2012.
Yang Zhichen. The research of the high strain dynamic testing parameters for foundation pile [D]. Jinan: Shandong Jianzhu University, 2012.
[7] 刘士伟. 高应变法测承载力在预应力管桩检测中的应用研究[D]. 青岛：青岛理工大学，2015.
Liu Shiwei. Application research on high strain measurement of bearing capacity in the detection of prestressed pipe pile [D]. Qingdao: Qingdao University of Technology, 2015.
[8] 贺晓华. 基桩高应变动测分析方法及应用研究[D]. 合肥：安徽建筑大学，2016.
He Xiaohua. Application research and analysis on high strain dynamic testing methods for foundation pile [D]. Hefei: Anhui Jianzhu University, 2016.
[9] 李飒, 徐保照, 李怀亮, 等. 基于概率分布高应变动测结果可靠性研究[J].地下空间与工程学报，2016, 12（5）：1423-1430.
Li Sa, Xu Baozhao, Li Huailing, et al. The study of the reliability of high strain dynamic testing based on probability distribution [J]. Chinese Journal of Underground Space and Engineering, 2016, 12(5): 1423-1430.
[10] Salgado R, Zhang Y, Abou-Jaoude G, et al. Pile driving formulas based on pile wave equation analyses [J]. Computers & Geotechnics, 2017, 81:307-321.
[11] 熊凯峰，陈荣保，陈建江，等. 泥质粉砂岩预应力管桩高应变动力测试试验研究[J]. 广东土木与建筑，2018，25（11）：38-41.
Xiong Kaifeng, Chen Rongbao, Chen Jianjiang, et al. Experimental study on high strain dynamic test of pre-stressed pipe pile on pelitic siltstone [J]. Guangdong Architecture Civil Engineering, 2018, 25(11): 38-41.
[12] 王奎华，郭海超，高柳，等. 三维波动土中带承台单桩的纵向振动特性研究[J]. 岩石力学与工程学报，2018,37（2）：497-505.
Wan Kuihua, Guo Haitao, Gao Liu, et al. Longitudinal vibration of single pile with cushion cap in three-dimensional layered surrounding soil [J]. Chinese Journal of Rock Mechanics and Engineering, 2018, 37 (2): 497-505.
[13] 吴文兵，王奎华，窦斌. 任意层地基中粘弹性楔形桩纵向振动响应研究[J]. 振动与冲击，2013，32（8）：120-127.
Wu Wenbin, Wan Kuihua, Dou Bin. Vertical dynamic response of a viscoelastic tapered pile embedded in layered foundation [J]. Journal of Vibration and Shock, 2013, 32 (8): 120-127.
[14] 郑长杰，丁选明，刘汉龙，等. 考虑土体三维波动效应的现浇大直径管桩纵向振动响应解析解[J]. 岩土工程学报，2013，35（12）：2248-2254.
Zhen Changjie, Ding Xuanming, Liu Hanlong, et al. Analytical solution to vertical vibration of cast-in-place concrete large-diameter pipe piles by considering 3D wave effect of soils [J]. Chinese Journal of Geotechnical Engineering. 2013, 35(12): 2248-2254.
[15] Bowles J E. The wave equation used to establish pile load-stress criteria [J]. Proc, Conf. Des. Install. Pile Found. Cell. Struct. Lehigh Univ., 1970:309-317.
[16] Holeyman A E. Technology of pile dynamic testing [J]. In: Proceedings of the 4th International conference on the Application of Stress Wave Theory to Piles, A. A. Balkena, Rotterdam, Netherlands, 1992:195-215.
[17] Zhang Q Q, Li L P, Chen L J. Analysis of compression pile response using a softening model, a hyperbolic model of skin friction, and a bilinear model of end resistance [J]. Journal of Engineering Mechanics. ASCE, 2014, 140(1):102-111.
[18] 陈荣保，张季超，熊凯峰，等. 基桩动测承载力数值分析及应用[J]. 广东土木与建筑，2018，25（12)：46-50.
Chen Rongbao, Zhan Jichao, Xioang Kaifeng, et al. Numerical analysis of dynamic bearing capacity of foundation piles and its application [J]. Guangdong Architecture Civil Engineering, 2018, 25(12):46-50.
[19] 陈荣保，熊凯峰，陈建江，等. 基桩动测承载力的分析方法及系统：中国，ZL201810599052.3 [P]. 2019, 3. 19.
Chen Rongbao, Xiong Kaifeng, Chen Jianjiang, et al. Analysis method and system of dynamic bearing capacity of foundation pile: ZL201810599052.3 [P]. 2019, 3. 19, China.