双层高岭黏土中沉桩特性模型试验

doi:10.13278/j.cnki.jjuese.20170105

Abstract

Abstract: The beam centrifuge pile-jacking system of the University of Western Australia was employed to carry out the penetration mechanism of jacked pile in clay. A series of T-bar tests, sinking pile tests, pile tensile tests and pile compression tests were made in two-layered kaolin clay. The comparison and analysis were conducted to the applications of T-bar in homogeneous soft clay and in two-layered clay by measuring the undrained shear strength with different penetration depth. The profiles of penetration resistance, end resistance and shaft resistance during the pile installation as well as the changing of pile radial stresses during the pile installation were investigated. The different relationships between pile final pressure and pile bearing capacity were revealed. The results show that shaft resistance plays a major role in the whole pile penetration resistance in clay; for the same soil layer, the pile end resistance is not affected by the properties of adjacent soil layers when the pile end exceeds a certain range of influence below the soil interface; in addition, the time effect of pile shaft friction on bearing capacity is greater than that of end resistance.

Key words: two-layered, kaolin clay, penetration characteristics, radial stresses, 1g model test

CLC Number:

TU473

Li Yunong, Lehane B M. Lateral Stress for Model Jacked Piles in Two-Layered Kaolin Clay[J].Journal of Jilin University(Earth Science Edition), 2018, 48(6): 1778-1784.

References

[1] Lehane B M, Gavin K G. Base Resistance of Jacked Pipe Piles in Sand[J]. Journal of Geotechnical and Geoenvironmental Engineering, 2001, 127(6):473-480.
[2] 丁佩民, 肖志斌, 施健勇, 等. 松砂中大型静压沉桩模型试验桩基挤土加密效应[J].工业建筑, 2003, 33(3):45-48. Ding Peimin, Xiao Zhibin, Shi Jianyong, et al. Model Tests of Large Driven Pile Jacked into Sands and Soil-Pile Interaction Finite Element Analysis with Compaction Effect Taken into Account[J].Industrial Construction,2003,33(3):45-48.
[3] 周健, 邓益兵, 叶建忠, 等. 砂土中静压桩沉桩过程试验研究与颗粒流模拟[J].岩土工程学报, 2009, 31(4):501-507. Zhou Jian, Deng Yibing, Ye Jianzhong, et al. Experimental and Numerical Analysis of Jacked Piles During Installation in Sand[J].Chinese Journal of Geotechnical Engineering, 2009, 31(4):501-507.
[4] Nicola A D, Randolph M F. Centrifuge Modelling of Pipe Piles in Sand Under Axial Loads[J]. Geotechnique, 1999, 49(3):295-318.
[5] Lehane B M, White D J. Lateral Stress Changes and Shaft Friction for Model Displacement Piles in Sand[J]. Canadian Geotechnical Journal, 2005, 42(4):1039-1052.
[6] 刘清秉, 项伟, Lehane B M, 等. 颗粒形状对砂土抗剪强度及桩端阻力影响机制试验研究[J].岩石力学与工程学报, 2011, 30(2):400-410. Liu Qingbing, Xiang Wei, Lehane B M, et al. Experimental Study of Effect of Particle Shear Strength of Sand and Tip Resistance of Driven Piles[J]. Chinese Journal of Rock Mechanics and Engineering, 2011, 30(2):400-410.
[7] Eide O, Hutchinson J N, Landava A. Short and Long Term Test Loading of a Friction Pile in Clay[C]//5th International Conference on Soil Mechanics and Foundation Engineering. Paris:[s.n.],1961:45-54.
[8] Cooke R W, Price G, Tarr K. Jacked Piles in London Clay:A Study of Load Transfer and Settlement Under Working Condition[J]. Geotechnique, 1979, 29(2):113-147.
[9] Bond A J, Jardine R J. Effects of Installing Displa-cement Piles in High OCR Clay[J]. Geotechnique, 1991, 41(3):341-363.
[10] 张明义, 邓安福. 预制桩贯入层状地基的试验研究[J]. 岩土工程学报, 2000, 22(4):490-492. Zhang Mingyi, Deng Anfu. Experimental Study on Jacked Precast Piles in Layered Soil[J]. Chinese Journal of Geotechnical Engineering, 2000, 22(4):490-492.
[11] Pestana J M, Hunt C E, Bray J D. Soil Deformation and Excess Pore Pressure Field Around a Closed-Ended Pile[J]. Journal of Geotechnical and Geoenvironmental Engineering, 2002, 128(1):1-12.
[12] Gavin K G, Gallagher D G, Doherty P D, et al. Field Investigation Assessing the Effect of Installation Method on the Shaft Resistance of Piles in Clay[J]. Canadian Geotechnial Journal, 2010, 47(7):730-741.
[13] Doherty P D, Gavin K G. Shaft Capacity of Open-Ended Piles in Clay[J]. Journal of Geotechnical and Geoenvironmental Engineering, 2011, 137(11):1090-1102.
[14] Kou H L, Zhang M Y, Yu F. Shear Zone Around Jacked Piles in Clay[J]. Journal of Performance of Constructed Facilities, 2015, 29(6):.
[15] Einav I, Randolph M F. Combining Upper Bound and Strain Path Methods for Evaluating Penetration Resistance[J]. International Journal for Numerical Methods in Engineering, 2010, 63(14):1991-2016.
[16] Martin C M, Randolph M F. Upper-Bound Analysis of Lateral Pile Capacity in Cohesive Soil[J]. Geotechnique, 2006, 56(2):141-146.

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Lateral Stress for Model Jacked Piles in Two-Layered Kaolin Clay

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