Abstract: Through on-site CPTU testing, software which interprets CPTU data was used to interpret the test data, and CPTU method was used to classify the site and stratify the soil layer. The physical and mechanical parameters of the soil in the engineering area were calculated, and the applicability of CPTU technology in deep marine soft soil area was proved by comparing the indoor test results. The CPTU method was used to predict the vertical bearing capacity of pile foundation theoretically. The numerical model of rigid pile composite foundation was established, and the field static load test was simulated. The results of single pile vertical ultimate bearing capacity of composite foundation obtained by theoretical formula calculation, numerical simulation and field static load test were compared and analyzed, and the failure forms of composite foundation are discussed. On this basis, the determination of bearing capacity characteristic value of single pile in composite foundation was deeply studied and the interaction mechanism between pile and soil in composite foundation and the working behavior under design load were studied.
蔡国军, 刘路路, 龚申, 刘松玉. 基于CPTU测试的海相软土刚性桩复合地基承载特性研究[J]. 隧道与地下工程灾害防治, 2019, 1(3): 46-56.
CAI Guojun, LIU Lulu, GONG Shen, LIU Songyu. Bearing characteristics of rigid pile composite foundation in marine soft soil based on CPTU. Hazard Control in Tunnelling and Underground Engineering, 2019, 1(3): 46-56.
刘志彬,刘松玉,经绯,等. 长江口海陆交互相沉积土复合地基孔压响应特性[J]. 岩土工程学报, 2015, 37(2): 91-95. LIU Zhibin, LIU Songyu, JING Fei, et al. Pore pressure response of composite foundation in interactive marine and terrestrial deposit of Yangtze River Estuary[J]. Chinese Journal of Geotechnical Engineering, 2015, 37(2): 91-95.
[2]
陈晓平,黄国怡,梁志松. 珠江三角洲软土特性研究[J]. 岩石力学与工程学报, 2003, 22(1): 137-137. CHEN Xiaoping, HUANG Guoyi, LIANG Zhisong. Study on soil properties of the Pearl River Delta[J]. Chinese Journal of Rock Mechanics and Engineering, 2003, 22(1): 137-137.
[3]
CAI Guojun, LIU Songyu, PUPPALA A J. Reliability assessment of CPTU-based pile capacity predictions in soft clay deposits[J]. Engineering Geology, 2012, 141(1): 84-91.
[4]
CAI Guojun, LIU Songyu, PUPPALA A J. Predictions of coefficient of consolidation from CPTU dissipation tests in quaternary clays[J]. Bulletin of Engineering Geology and the Environment, 2012, 71(2): 337-350.
[5]
李洪江,刘松玉,童立元,等.基于CPTU测试太湖软土地层单桩水平承载实用分析及案例研究[J].岩土工程学报, 2018, 40(2): 378-383. LI Hongjiang, LIU Songyu, TONG Liyuan, et al. Case study and practical analysis of lateral bearing characteristics of a single pile in Taihu soft soils using CPTU data[J]. Chinese Journal of Geotechnical Engineering, 2018, 40(2): 378-383.
[6]
CAI Guojun, LIU Songyu, PUPPALA A J. Evaluation of pile bearing capacity from piezocone penetration test data in soft Jiangsu quaternary clay deposits[J]. Marine Georesources and Geotechnology, 2011, 29(3):177-201.
[7]
CAI Guojun, LIU Songyu, PUPPALA A J. Comparison of CPT charts for soil classification using CPT data: example from clay deposits in Jiangsu Province, China[J]. Engineering Geology, 2011, 121(1-2):89-96.
[8]
CAI Goujun, LIU Songyu, TONG Liyuan. Field evaluation of deformation characteristics of a lacustrine clay deposit using seismic piezocone tests[J]. Engineering Geology, 2010, 116(3):251-260.
[9]
CAI Goujun, LIU Songyu, TONG Liyuan., et al. Assessment of direct CPT and CPTU methods for predicting the ultimate bearing capacity of single piles[J]. Engineering Geology, 2009, 104(3):211-222.
[10]
SHEN Gong, CAI Goujun, LIU Songyu, et al. Numerical simulation of bearing capacity and consolidation characteristics of PHC pile foundation[C] // Geoshanghai International Conference. Singapore:Springer, 2018:178-185.
[11]
ABU-FARSAKH M Y, TITI H H. Assessment of direct cone penetration test methods for predicting the ultimate capacity of friction driven piles[J]. Journal of Geotechnical and Geoenvironmental Engineering, 2004, 130(9):935-944.
[12]
洪鑫. 单桩静载荷试验的理论模拟及影响因素分析[J]. 岩土工程学报, 2012,34(1):176-183. HONG Xin. Theoretical simulation and factors for static loading tests on a single pile[J]. Chinese Journal of Geotechnical Engineering, 2012, 34(1):176-183.
[13]
姚泽良. 竖向荷载作用下单桩极限承载力计算方法的研究[D].西安:西安理工大学,2003. YAO Zeliang. Calculating ultimately bearing capacity of vertically loading single pile[D]. Xi'an:Xi'an University of Technology,2003.
[14]
袁灯平, 黄宏伟, 马金荣. 软土地基桩侧表面负摩阻力解析模型[J]. 上海交通大学学报, 2005, 39(5): 731-735. YUAN Dengping, HUANG Hongwei, MA Jinrong. An analytical model of negative skin friction of piles in soft soil[J]. Journal of Shanghai Jiaotong University, 2005, 39(5): 731-735.
[15]
何腊平. 刚性桩复合地基沉降计算与模型试验研究[D].长沙:湖南大学,2009. HE Laping. Settlemtnt calulation and experimental study of rigid-pile composite foundation[D]. Changsha: Hunan University, 2009.
[16]
ALMEIDA M S S, DANZIGER F A B, LUNNE T. Use of the piezocone test to predict the axial capacity of driven and jacked piles in clay[J]. Canadian Geotechnical Journal, 1996, 33(1): 23-41.
[17]
ESLAMI A, FELLENIUS B H. Pile capacity by direct CPT and CPTU methods applied to 102 case histories[J]. Canadian Geotechnical Journal, 1997, 34(6): 886-904.
[18]
TAKESUE K, SASAO H, MATSUMOTO T. Correlation between ultimate pile skin friction and CPT data[J]. Geotechnical Site Characterization, Balkema, Rotterdam, 1998, 2: 1177-1182.
[19]
POWELL J J M, LUNNE T, FRANK R. Semi-empirical design for axial pile capacity in clays[C] // Proceedings of the 15th International Conference on Soil Mechanics and Geotechnical Engineering. Istanbul:[s.n.] , 2001(2): 991-994.
[20]
蔡国军, 刘松玉, PUPPALA A J. 基于CPTU测试的桩基承载力可靠性分析[J]. 岩土工程学报, 2011, 33(3):404-412. CAI Guojun, LIU Songyu, PUPPALA A J. Reliability assessment of bearing capacity of pile foundation based on CPTU data [J]. Chinese Journal of Geotechnical Engineering, 2011, 33(3):404-412.
[21]
刘松玉, 蔡国军, 邹海峰. 基于CPTU的中国实用土分类方法研究[J]. 岩土工程学报, 2013, 35(10): 1765-1776. LIU Songyu, CAI Guojun, ZOU Haifeng. Practical soil classification methods in China based on piezocone penetration tests [J]. Chinese Journal of Geotechnical Engineering, 2013, 35(10): 1765-1776.
[22]
蔡国军. 现代数字式多功能CPTU技术理论与工程应用研究[D].南京:东南大学, 2010. CAI Guojun. Research on theory and engineering application of modern digital multifunctional CPTU technology[D]. Nanjing:Southeast University, 2010.
[23]
RANDOLPH M F, STEINFELT J S, WROTH C P. The effect of pile type on design parameters for driven piles[C] // Proceedings of the 7th European Conf. on Soil Mechanics: Vol. 2. London, UK:British Geotechnical Society,1979:107-114.
[24]
NAUROY J F, LE TIRANT P. Model tests of calcareous sands[C] // Proceedings of the Conference on Geotechnical Practice in Offshore Engineering, ASCE. New York, USA:[s.n.] ,1983:356-369.
[25]
林军, 蔡国军, 刘松玉, 等. 基于孔压静力触探力学分层的土体边界识别方法研究[J]. 岩土力学, 2017, 38(5):1413-1423. LIN Jun, CAI Guojun, LIU Songyu, et al. Identification of soil layer boundaries using mechanical layered method base on piezocone penetration test data[J]. Rock and Soil Mechanics, 2017, 38(5):1413-1423.
[26]
刘松玉, 邹海峰, 蔡国军, 等. 基于CPTU的土分类方法在港珠澳大桥中的应用[J].岩土工程学报,2017, 39(增刊2): 1-4. LIU Songyu, ZOU Haifeng, CAI Guojun, et al. Application of CPTU-based soil classification methods in Hong Kong-Zhuhai-Macao Bridge[J]. Chinese Journal of Geotechnical Engineering, 2017, 39(Suppl.2): 1-4.
[27]
RANDOLPH M F, LEONG E C, HOULSBY G T. One-dimensional analysis of soil plugs in pipe piles[J]. Geotechnique, 1991, 41(4):587-598.
[28]
李洪江,刘松玉,童立元. 基于CPTU测试p-y曲线法及其在桩基水平承载中的应用[J]. 岩石力学与工程学报, 2017, 36(2): 513-520. LI Hongjiang, LIU Songyu, TONG Liyuan. A p-y curve method for defermining the horizontal bearing capacity of single pile based on CPTU test and its application [J]. Chinese Journal of Rock Mechanics and Engineering, 2017, 36(2): 513-520.
[29]
段伟宏,蔡国军,刘松玉.基于CPTU评价桩基水平承载特性研究综述[J]. 地下空间与工程学报, 2016, 12(增刊2): 907-912. DUAN Weihong, CAI Guojun, LIU Songyu. Review on evaluation of laterally loaded pile bearing capacity based on the CPTU data [J]. Chinese Journal of Underground Space and Engineering, 2016, 12(Suppl.2): 907-912.
[30]
耿功巧. 孔压静力触探贯入机理及其桩基工程应用研究[D].南京:东南大学,2016. GENG Gongqiao. Study on penetration mechanism of pore pressure static penetration test and its application in pile foundation engineering[D]. Nanjing:Southeast University, 2016.
蔡国军, 刘松玉. 基于CPTU测试的桩基承载力预测新方法[J]. 岩土工程学报, 2010, 32(增刊2): 479-482. CAI Guojun, LIU Songyu. New method based on CPTU data to evaluate pile bearing capacity [J]. Chinese Journal of Geotechnical Engineering, 2010, 32(Suppl.2): 479-482.
2019, Vol. 1 
