Simulation Study of the Load-settlement Behavior of a Single Pile Using the Osterberg-cell Test Based on the Load Transfer Theory

Abstract: In this paper, a theoretical relationship between the load and settlement of a single pile in an Osterberg-Cell test was developed, considering the joint action of piles and soil and a detailed deformation analysis was conducted based on the load transfer theory of piles. The shear test and the compression test were used to determine the load transfer parameters for soil layers around a pile at various depths as well as the parameters for pile-tip soils. Based on this method, a simulation analysis program was applied to determine the location of the balance point in the Osterberg-Cell test to provide a reference for the test design. The analytical methods presented in this paper could be considered practical because the results from the simulation test and on-site measurement indicate that the theoretically predicted result is consistent with the measurements. A reasonable selection of the location of the hydraulic jack-like device (O-cell) could maximize the bearing capacity of testing piles to obtain a more accurate ultimate bearing capacity. This study provides a reference for the design of the Osterberg-Cell test as well as pile foundations.

[1]  Yongkyu Choi,et al.  Determination of Loading Capacities for Bi-directional Pile Load Tests Based on Actual Load Test Results , 2015 .

[2]  H. Bolton Seed,et al.  Closure of "The Action of Soft Clay along Friction Piles" , 1957 .

[3]  Jong-Sub Lee,et al.  Equivalent pile load–head settlement curve using a bi-directional pile load test , 2008 .

[4]  Mu Baogang.  Self-balanced loading test for pile bearing capacity of pile underpinning on Jin-bin light track , 2010 .

[5]  Jiang Juan.  Simulation Test Method for Pile Bearing Capacity , 2004 .

[6]  S NiaziFawad,et al.  Axial pile response of bidirectional O-cell loading from modified analytical elastic solution and downhole shear wave velocity , 2014 .

[7]  Robert Blair Vocci.  Geology , 1882, Nature.

[8]  Wang Wen-jun.  Load transfer model and improved transition method for load-settlement curve under O-cell pile testing method , 2010 .

[9]  Zhang Ming.  Experimental study on sliding friction between pile and soil , 2002 .

[10]  M. Randolph,et al.  AN ANALYSIS OF THE VERTICAL DEFORMATION OF PILE GROUPS , 1979 .

[11]  Qi Wei.  Bored piles self-balancing test of Songhua River super large bridge in Lanqi , 2009 .

[12]  Xiong Juhua.  ANALYTICAL EQUATION OF LOADING-SETTLEMENT CURVE UNDER O-CELL PILE TESTING METHOD , 2006 .

[13]  Hyeong-Joo Kim,et al.  Design charts for elastic pile shortening in the equivalent top–down load–settlement curve from a bidirectional load test , 2011 .

[14]  Zhong Hui-hong.  Numerical iteration method for determining load-settlement relationship of a single pile , 2002 .

[15]  Liu Xin-liang.  Experimental study of pile-soil load transfer behavior of self-balanced pile , 2003 .

[16]  Hoon-Il Seol,et al.  Load–settlement behavior of rock-socketed drilled shafts using Osterberg-Cell tests , 2009 .

[17]  Nie Lei.  Analysis on bearing behaviour of large-scale cast-in-place pile in foundation with self-balanced method , 2005 .