Bending behavior of double-row stabilizing piles with constructional time delay

The bending behavior of double-row stabilizing plies is associated with the constructional time delay (CTD), which can be defined as the time interval between the installations of the front stabilizing pile and the rear stabilizing pile. This paper investigates the effect of CTD on the bending moments of double-row stabilizing piles and a method for determining the optimal CTD is proposed. The stabilizing pile is modeled as a cantilever pile embedded in the Winkler elastic foundation. A triangular distributed earth pressure is assumed on the pile segment in the sliding layer. The front stabilizing pile and the rear stabilizing pile are connected by a beam with pinned joints. The analytical solutions of bending moments on the front and the rear stabilizing piles are derived and the accuracy of bending moment solutions is validated by comparing the tensile strain measured from the Hongyan landslide project, Taizhou, Zhejiang, China. It is concluded that CTD has a significant influence on the bending moments of double-row stabilizing piles. An optimal CTD can be obtained when the maximum tensile stress in the front stabilizing pile is equal to that in the rear stabilizing pile, which is 1.4 months for the Hongyan landslide project.

[1]  Yasumasa Fukumoto.  The Behaviour of Piles for Preventing Landslide , 1976 .

[2]  Harry G. Poulos,et al.  Pile foundation analysis and design , 1980 .

[3]  M. Randolph,et al.  The response of flexible piles to lateral loading , 1981 .

[4]  B. Rajani,et al.  PIPELINES AND LATERALLY LOADED PILES IN ELASTOPLASTIC MEDIUM. DISCUSSION AND CLOSURE , 1993 .

[5]  Harry G. Poulos,et al.  Design of reinforcing piles to increase slope stability , 1995 .

[6]  Mark Fraser Bransby,et al.  3-D FINITE ELEMENT MODELLING OF PILE GROUPS ADJACENT TO SURCHARGE LOADS , 1996 .

[7]  Harry G. Poulos,et al.  Piles Subjected to Lateral Soil Movements , 1997 .

[8]  H. G. Poulos,et al.  Model Tests on Pile Groups Subjected to Lateral Soil Movement. , 1997 .

[9]  Sarah M. Springman,et al.  Selection of load-transfer functions for passive lateral loading of pile groups , 1999 .

[10]  Harry G. Poulos,et al.  General elastic analysis of piles and pile groups , 2000 .

[11]  Yun-mei Hsiung,et al.  Theoretical elastic-plastic solution for laterally loaded piles , 2003 .

[12]  J. Michael Duncan,et al.  Rotational Restraint of Pile Caps during Lateral Loading , 2003 .

[13]  Chun Fai Leung,et al.  Behavior of Pile Groups Subject to Excavation-Induced Soil Movement , 2003 .

[14]  Gary Norris,et al.  Lateral Behavior of Pile Groups in Layered Soils , 2004 .

[15]  K. Rollins,et al.  Measured and Computed Lateral Response of a Pile Group in Sand , 2006 .

[16]  Antonio G. F. De Sousa Coutinho.  Data Reduction of Horizontal Load Full-Scale Tests on Bored Concrete Piles and Pile Groups , 2006 .

[17]  Kyle M. Rollins,et al.  Pile Spacing Effects on Lateral Pile Group Behavior: Load Tests , 2006 .

[18]  William Powrie,et al.  Monitoring and analysis of the bending behaviour of discrete piles used to stabilise a railway embankment , 2007 .

[19]  Fred H. Kulhawy,et al.  Reduction of pile head displacement for restrained-head single pile , 2009 .

[20]  Tae-Hyung Kim,et al.  Behavior and stability of a large-scale cut slope considering reinforcement stages , 2009 .

[21]  Chun Fai Leung,et al.  Behavior of Pile Groups Subject to Excavation-Induced Soil Movement in Very Soft Clay , 2009 .

[22]  A. Boominathan,et al.  Group interaction effects on laterally loaded piles in clay. , 2010 .

[23]  Emilios M. Comodromos,et al.  On the response prediction of horizontally loaded fixed-head pile groups in sands , 2010 .

[24]  Byung Tak Kim,et al.  Laboratory modeling of laterally loaded pile groups in sand , 2011 .

[25]  J. Barber,et al.  Beams on Elastic Foundations , 2011 .

[26]  Keizo Ugai,et al.  A subgrade reaction solution for piles to stabilise landslides , 2011 .

[27]  B Teymur,et al.  Behaviour of Laterally Loaded Piles , 2013 .