Evaluation method of bearing characteristics of uplift pile based on CPTU test

被引：0
|
作者：
Feng H. [1 ]
Liu D. [1 ,2 ]
Cai G. [1 ,3 ]
Duan W. [1 ,4 ]
机构：
[1] Institute of Geotechnical Engineering, Southeast University, Jiangsu, Nanjing
[2] Nanjing Qinhuai State Assets Holding Group Co.，Ltd., Jiangsu, Nanjing
[3] School of Civil Engineering, Anhui Jianzhu University, Anhui, Hefei
[4] College of Civil Engineering, Taiyuan University of Technology, Shanxi, Taiyuan
来源：
Yanshilixue Yu Gongcheng Xuebao/Chinese Journal of Rock Mechanics and Engineering | 2023年 / 42卷
基金：
中国国家自然科学基金;
关键词：
bearing characteristics; CPTU; model test; numerical simulation; pile foundation; uplift pile;
D O I：
10.13722/j.cnki.jrme.2022.0660
中图分类号：
学科分类号：
摘要：
Uplift pile foundation is widely used in underground space in coastal areas. The uplift characteristics of structures are the engineering indices that must be evaluated. Many scholars have studied the prediction methods of the uplift bearing characteristics of pile foundation based on CPTU test，and proposed the empirical formula for specific site. These empirical formulas have great limitations when applied to local sites. Therefore，a method based on CPTU is proposed to predict the uplift bearing characteristics of pile foundation in soft soil layer in coastal areas. Model tests were carried out to study the influence of the length-to-diameter ratio of pile foundation and the roughness of pile surface on the bearing characteristics of the uplift pile. The mechanical mechanism of the uplift pile in the working process and the interaction mechanism between pile and soil were studied. The results of the model tests were further verified by numerical simulation analysis. The CPTU test was carried out in the model bucket. The empirical relationship between pile side friction resistance and CPTU test parameters was established. The empirical relationship proposed in this paper is applied to a soft soil engineering site in Wenzhou. The error between the uplift pile bearing capacity calculated by the proposed method and the measured results is only 7.7%，lower than other methods of calculation results. The calculation accuracy is higher and it has a high applicability in predicting the bearing characteristics of uplift pile in soft soil. © 2023 Academia Sinica. All rights reserved.
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页码：3778 / 3791
页数：13
相关论文
共 37 条
  • [1] KOLK H J, BAAIJENS A E, SENDERS M., Design criteria for pipe piles in silica sands[C], Proceedings of the 1st International Symposium on Frontiers in Offshore Geotechnics, pp. 711-716, (2005)
  • [2] ZHANG L, SARGAN D S M., Tensile and compressive shaft capacity of piles in sand[J], Journal of Geotechnical Engineering, 119, 12, pp. 403-405, (1993)
  • [3] LUNNE T, ROBERTSON P K., Cone penetration testing in geotechnical practice[M], pp. 222-247, (2002)
  • [4] LIAO T, MAYNE P W., Stratigraphic delineation by three-dimensional clustering of piezocone data[J], Georisk：Assessment and Management of Risk for Engineered Systems and Geohazards, 1, 2, pp. 102-119, (2007)
  • [5] ESLAMI A, FELLENIUS B H., CPT and CPTu data for soil profile interpretation：review of methods and a proposed new approach[J], Iranian Journal of Science and Technology Transaction B-Engineering, 28, pp. 69-86, (2004)
  • [6] CHATTOPADHAYA B C., Uplift capacity of plies in sand[J], Journal of Geotechnical Engineering, 112, 9, pp. 888-904, (1986)
  • [7] SHANKER K, BASUDHAR P K, PATRA N R., Uplift capacity of single piles ： predictions and performance[J], Geotechnical and Geological Engineering, 25, 2, pp. 151-161, (2007)
  • [8] FAIZI K，, ARMAGHANI D J，, SOHAEI H，, Et al., Deformation model of sand around short piles under pullout test[J], Measurement, 63, pp. 110-119, (2015)
  • [9] REDDY K M，, AYPTHIRAMAN R., Experimental studies on behavior of single pile under combined uplift and lateral loading[J], Journal of Geotechnical and Geoenvironmental Engineering, 141, 7, (2015)
  • [10] CLAUSEN C, AAS P M, KARLSRUD K., Bearing capacity of driven piles in sand，the NGI approach[C], Proceedings of International Symposium. on Frontiers in Offshore Geotechnics, pp. 22-47, (2005)
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