›› 2014, Vol. 35 ›› Issue (S1): 221-226.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Interaction coefficients method for calculating piles group settlements considering reinforcing and restraining effect

LIN Zhi-yong1, 2,DAI Zi-hang1, 3   

  1. 1. Institute of Geotechnical Engineering, Fuzhou University, Fuzhou 350108, China; 2. College of Civil Engineering, Fujian University of Technology, Fuzhou 350108, China; 3. School of Civil, Mining and Environmental Engineering, University of Wollongong, New South Wales 2522, Australia
  • Received:2013-07-31 Online:2014-06-10 Published:2014-06-20

Abstract: The reinforcing and restraining effect of piles embedded in soils is objective existence. However, the correlative research work on pile groups settlement methods is not deep enough and needs to be continued. Based on the shear displacement method, considering the reinforcing and restraining effect, the settlements of the analyzing pile caused by loads on the pile top were calculated, including the reduction effect caused by the existence of the other adjacent piles. And the additional settlements of the adjacent piles arising from the settlement of the loaded pile were obtained as well. Thus a simplified formula of interaction coefficients between any two piles was presented. Meanwhile, the equivalent shear stiffness coefficients of soil around each pile were developed; and an equation of displacements caused by load on top of the analyzing pile imbedded in multi-layered soils was built; so recurrence relations of settlement and axial force of pile shaft between upper and lower of each pile sections were respectively deduced; in the process of deduction, Boussinesq solution was modified to include the effect of different embedded depths, and then used to derive the equivalent stiffness coefficients of the soil under the pile tips. Lastly, the formula was extended to the settlements calculation of high and low cap pile groups. Different methods were compared with two engineering cases. The results show that the load-settlement curve computed by present method agreed well with those measured from real engineering cases; and the calculating interaction coefficients are much less than ones calculated by the elastic theory method.

Key words: reinforcing and restraining effect, interaction coefficient, pile group settlement, shear displacement method, multi-layered soils

CLC Number: 

  • TU473
[1] WANG Zhong-kai, XU Guang-li. Influence range and quantitative prediction of surface deformation during shield tunnelling and exiting stages [J]. Rock and Soil Mechanics, 2020, 41(1): 285-294.
[2] ZHOU Li-duo, KONG Gang-qiang, PENG Huai-feng, GU Hong-wei, ZHU Xi,. Theoretical analysis of bearing capacities of pile group under oblique load [J]. , 2017, 38(9): 2647-2654.
[3] XIN Dong-dong, ZHANG Le-wen, SU Chuan-xi. Settlement research of pile groups in layered soils based on virtual soil-pile model [J]. , 2017, 38(8): 2368-2376.
[4] LONG Zhao,ZHAO Ming-hua,ZHANG En-xiang,LIU Jun-long. A simplified method for calculating critical anchorage length of bolt [J]. , 2010, 31(9): 2991-2994.
[5] LIU Jie, HE Jie, MIN Chang-qing. Contrast research of bearing behavior for composite foundation with tapered piles and cylindrical piles [J]. , 2010, 31(7): 2202-2206.
[6] GAO Meng, GAO Guang-yun, YANG Cheng-bin, FENG Shi-jin, JI Yu-jun. Analytical solution for settlement of group piles in layered ground based on shear displacement method [J]. , 2010, 31(4): 1072-1077.
[7] LIN Ben-hai, FANG Hui. Application of long and short piles high strength composite foundation to high-rise building [J]. , 2009, 30(S2): 302-307.
[8] CHEN Chang-fu, ZHOU Zhi-jun. Analysis of pile-soil stress ratio for double reinforced composite ground [J]. , 2009, 30(9): 2660-2666.
[9] MEI Guo-xiong , ZAI Jin-min , SONG Lin-hui , XU Mei-juan,. Semi-analytical method and application in geotechnical engineering [J]. , 2007, 28(S1): 333-337.
[10] QIU Liang, ZHU Ning. Settlement analysis of composite foundation with rigid piles under flexible ground [J]. , 2007, 28(9): 1964-1968.
[11] ZHU Kui, XU Ri-qin . Study on pile group settlement in layered foundation [J]. , 2006, 27(S2): 870-874.
[12] WANG Wei, YANG Min. An improved elastic analysis method of pile foundation under vertical loading [J]. , 2006, 27(8): 1403-1406.
[13] LIANG Fa-yun , CHEN Long-zhu , LI Jing-pei,. Analysis of piles reinforced effects on interaction coefficients of piles [J]. , 2005, 26(11): 1757-1760.
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