桩基承载力多点动测法的理论与试验研究

doi:10.13722/j.cnki.jrme.2023.0471

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Abstract Compared with static load test(SLT)，high-strain dynamic test(HSDT) of pile foundation is more effective，rapid and less costly. A new HSDT method was proposed and verified，which is called the multi-point dynamic method(MPDM). The difference and influence factors of pile capacity curves between SLT and DLT were studied through theoretical analysis and model experiments in the presented paper. Based on the nonlinear soil resistance model，the dynamic discrete spring-mass model of single pile under high strain condition was established firstly；the analytical expression of impact force of free-fall hammer was derived and the discrete difference solution was given. The dynamic load curves under different pile lengths was calculated based on MPDM and compared with SLT results and results predicted by Statnamic method. On this basis，model experiments were conducted to explore the difference of dynamic and static capacity curves，and to verify the reliability of MPDM. The results have shown that the capacity curve predicted by MPDM was accurate for pile of short length；the prediction results was better than that of Statnamic method for long piles. The difference between the dynamic and static curves was related to the wave effect of pile，and the prediction accuracy of the multi-point dynamic measurement method can be improved by adjusting the excitation conditions at the pile top to attenuate the wave effect. The presented theoretical model，which can consider the soil nonlinearity，accurately predicted the dynamic response of model pile. And it is applicable for low stain and high strain dynamic load conditions. This research is helpful to study HSDT methods，dynamic theoretical model and the difference between dynamic and static capacity curves.

Key words： pile foundations pile foundation bearing capacity high-strain dynamic test multi-point dynamic method dynamic and static comparison

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	Articles by authors
	CHEN Chen1
	TU Yuan2
	WEN Minjie2

Cite this article:

CHEN Chen1,TU Yuan2,WEN Minjie2. Theoretical and experimental research on multi-point dynamic testing method for pile bearing capacity[J]. , 2024, 43(S2): 4072-4084.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2023.0471 OR https://rockmech.whrsm.ac.cn/EN/Y2024/V43/IS2/4072

[14]	FOREHAND P W，REESE J L. Prediction of pile capacity by the wave equation[J]. Journal of Soil Mechanics and Foundations Division，ASCE，1964，90(2)：1-25.
[1]	中华人民共和国行业标准编写组. JGJ 106—2018建筑基桩检测技术规范[S]. 北京：中国建筑工业出版社，2018.(The Professional Standards Compilation Group of People?s Republic of China. JGJ 106—2018 Technical code for testing of building foundation piles[S]. Beijing：China Architecture and Building Press，2018.(in Chinese))
[15]	贺善斌. 基桩高应变实测曲线拟合法实例分析与讨论[J]. 土工基础，2013，27(1)：59-62.(HE Shanbin. Dicussion on the pile axial capacity prediction through curve fitting of measured high strain data[J]. Soil Engineeing and Foundation，2013，27(1)：59-62.(in Chinese))
[2]	龚晓南. 桩基工程手册[M]. 2版. 北京：中国建筑工业出版社，2016：990-995.(GONG Xiaonan. Pile foundation engineering manual[M]. 2nd ed. Beijing：China Architecture and Building Press，2016：990-995.(in Chinese))
[16]	李廷. 基桩高应变锤桩土相互作用机理及其模拟试验研究[博士学位论文][D]. 长沙：中南大学，2010.(LI Ting. The study of interaction mechanism and simulation of hammer-pile-soil in high strain dynamic testing[Ph. D. Thesis][D]. Changsha：Central South University，2010.(in Chinese))
[3]	PHAN T L. Numerical and experimental studies on dynamic load testing of open-ended pipe piles and its applications[Ph. D. Thesis][D]. Kanazawa University of Japan，2013.
[17]	蒋万里，朱国甫，张杰. 单桩承载力的一种直接动测法[J]. 岩土力学，2020，41(10)：1-9.(JIANG WANli，ZHU Guofu，ZHANG Jie. A direct high-strain method for the bearing capacity of single piles[J]. Rock and Soil Mechanics，2020，41(10)：1-9.(in Chinese))
[4]	PAIKOWSKY S G，CHERNAUSKAS L R. Energy approach for capacity evaluation of driven piles[C]// Proceedings of the Fourth International Conference on the Application of Stress Wave Theory to Piles. The Hague，Netherlands：[s. n.]，1992：595-601.
[18]	CHOW Y K. Analysis of vertically loaded pile groups[J]. International Journal for Numerical and Analytical Methods in Geomechanics，1986，10：59-72.
[5]	SALGADO R，ZHANG Y，ABOU-JAOUDE G，et al. Pile driving formulas based on pile wave equation analyses[J]. Computers and Geotechnics，2017，81：307-321.
[19]	RANDOLPH M F，DEEKS A J. Dynamic and static soil models for axial response[C]// Proceedings of the 4th International Conference on the Application of Stress Wave Theory to Piles. The Hague：[s. n.]，1992：3-14.
[6]	李增选，张莹. 静动试桩法及其应用[J]. 同济大学学报：自然科学版，2000，(1)：108-112.(LI Zengxuan，ZHANG Ying. Statnamic pile testing method and its application[J]. Journal of Tongji University：Nature Science，2000，(1)：108-112.
[20]	王腾. 成层土中桩纵向振动理论及其在PIT中的应用[博士学位论文][D]. 杭州：浙江大学，2001.(WANG Teng. Longitudinal vibration theory of pile in layered soils and its application in PIT[Ph. D. Thesis][D]. Hangzhou：Zhejiang University，2001.(in Chinese))
[7]	SMITH E A L. Pile driving analysis with the wave equation[J]. Journal of Soil Mechanics and Foundations Division，ASCE，1960，86(4)：35-61.
[21]	MIDDENDROP P，BERMINGHAM P，KUIPER B. Statnamic load testing of foundation piles[C]// Proceedings of the 4th International Conference on the Application of Stress Wave Theory to Piles. The Hague，The Netherlands：[s. n.]，1992：581-588.
[8]	GOBLE G G，RAUSCHE F. Wave equation analysis of pile driving：WEAP program，use?s manual[R]. [S. l.]：[s. n.]，1976.
[9]	RAUSCHE F，GOBLE G，LIKINS G. Dynamic determination of pile capacity[J]. Journal of Soil Mechanics and Foundations Division，ASCE，1985，111(3)：367-383.
[10]	RAUSCHE F，MOSES F，GOBLE G. Soil resistance predictions from pile dynamics[J]. Journal of Soil Mechanics and Foundations Division，ASCE，1972，98(SM9)：917-937.
[11]	YUAN J X，ZHU G F. Pile wave analysis program by optimization methods under large strain of soil[J]. Chinese Journal of Geotechnical Engineering，1990，12(6)：1-11.
[12]	陈凡. FEIPWAPC 特征线桩基波动分析程序[J]. 岩土工程学报，1990，12(5)：65-75.(CHEN Fan. Wave analysis program of pile based on FEIWAPC feature line[J]. Chinese Journal of Geotechnical Engineering，1990，12(5)：65-75.(in Chinese))
[13]	胡学科，马少俊，王奎华. 传感器安装位置对高应变打桩监测结果影响的研究[J]. 振动与冲击，2011，30(4)：259-264.(HU Xueke，MA Shaojun，WANG Kuihua. Influence of position of sensor on results measured on a high strain pile[J]. Journal of Vibration and Shock，2011，30(4)：259-264.(in Chinese))
[14]	FOREHAND P W，REESE J L. Prediction of pile capacity by the wave equation[J]. Journal of Soil Mechanics and Foundations Division，ASCE，1964，90(2)：1-25.
[15]	贺善斌. 基桩高应变实测曲线拟合法实例分析与讨论[J]. 土工基础，2013，27(1)：59-62.(HE Shanbin. Dicussion on the pile axial capacity prediction through curve fitting of measured high strain data[J]. Soil Engineeing and Foundation，2013，27(1)：59-62.(in Chinese))
[16]	李廷. 基桩高应变锤桩土相互作用机理及其模拟试验研究[博士学位论文][D]. 长沙：中南大学，2010.(LI Ting. The study of interaction mechanism and simulation of hammer-pile-soil in high strain dynamic testing[Ph. D. Thesis][D]. Changsha：Central South University，2010.(in Chinese))
[17]	蒋万里，朱国甫，张杰. 单桩承载力的一种直接动测法[J]. 岩土力学，2020，41(10)：1-9.(JIANG WANli，ZHU Guofu，ZHANG Jie. A direct high-strain method for the bearing capacity of single piles[J]. Rock and Soil Mechanics，2020，41(10)：1-9.(in Chinese))
[18]	CHOW Y K. Analysis of vertically loaded pile groups[J]. International Journal for Numerical and Analytical Methods in Geomechanics，1986，10：59-72.
[19]	RANDOLPH M F，DEEKS A J. Dynamic and static soil models for axial response[C]// Proceedings of the 4th International Conference on the Application of Stress Wave Theory to Piles. The Hague：[s. n.]，1992：3-14.
[20]	王腾. 成层土中桩纵向振动理论及其在PIT中的应用[博士学位论文][D]. 杭州：浙江大学，2001.(WANG Teng. Longitudinal vibration theory of pile in layered soils and its application in PIT[Ph. D. Thesis][D]. Hangzhou：Zhejiang University，2001.(in Chinese))
[21]	MIDDENDROP P，BERMINGHAM P，KUIPER B. Statnamic load testing of foundation piles[C]// Proceedings of the 4th International Conference on the Application of Stress Wave Theory to Piles. The Hague，The Netherlands：[s. n.]，1992：581-588.