Similar articles

Abstract: 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]Ashour, M., Pilling, P., Norris, G., 2004. Lateral behavior of pile groups in layered soils. Journal of Geotechnical and Geoenvironmental Engineering, 130(6):580-592.

[2]Bransby, M.F., Springman, S.M., 1996. 3-D finite element modelling of pile groups adjacent to surcharge loads. Computers and Geotechnics, 19(4):301-324.

[3]Bransby, M.F., Springman, S.M., 1999. Selection of load- transfer functions for passive lateral loading of pile groups. Computers and Geotechnics, 24(3):155-184.

[4]Cai, F., Ugai, K., 2011. A subgrade reaction solution for piles to stabilise landslides. Geotechnique, 61(2):143-151.

[5]Chandrasekaran, S.S., Boominathan, A., Dodagoudar, G.R., 2010. Group interaction effects on laterally loaded piles in clay. Journal of Geotechnical and Geoenvironmental Engineering, 136(4):573-582.

[6]Chen, L.T., Poulos, H.G., 1997. Piles subjected to lateral soil movements. Journal of Geotechnical and Geoenvironmental Engineering, 123(9):802-811.

[7]Chen, L.T., Poulos, H.G., Hull, T.S., 1997. Model tests on pile groups subjected to lateral soil movement. Soils and Foundations, 37(1):1-12.

[8]Clark, J., Richards, D.J., 2005. Measurement of Bending Moment in Concrete. Proceeding of the 16th International Conference Soil Mechanics and Geotechnical Engineering, Osaka, 2:1027-1030.

[9]de Sousa Coutinho, A.G.F., 2006. Data reduction of horizontal load full-scale tests on bored concrete piles and pile groups. Journal of Geotechnical and Geoenvironmental Engineering, 132(6):752-769.

[10]Esu, F., D’Elia, B., 1974. Interazione terreno-struttura in un palo sollectato dauna frana tipo colata. Rivsita Italiana di Geotechica, 8(1):27-38 (in Italian).

[11]Fukumoto, Y., 1976. The behaviour of piles for preventing landslide. Soils and Foundations, 16(2):91-103 (in Japanese).

[12]Hetenyi, M., 1946. Beams on Elastic Foundations. University of Michigan Press, Michigan.

[13]Hsiung, Y.M., 2003. Theoretical elastic-plastic solution for laterally loaded piles. Journal of Geotechnical and Geoenvironmental Engineering, 129(5):475-480.

[14]Hull, T.S., 1987. The Behaviour of Laterally Loaded Piles. PhD Thesis, University of Sydney, Sydney, Australia.

[15]Kang, G.C., Song, Y.S., Kim, T.H., 2009. Behavior and stability of a large-scale cut slope considering reinforcement stages. Landslides, 6(3):263-272.

[16]Kim, B.T., Yoon, G.L., 2011. Laboratory modeling of laterally loaded pile groups in sand. KSCE Journal of Civil Engineering, 15(1):65-75.

[17]Leung, C.F., Lim, J.K., Shen, R.F., Chow, Y.K., 2003. Behavior of pile groups subjected to excavation-induced soil movement. Journal of Geotechnical and Geoenvironmental Engineering, 129(1):58-65.

[18]Mokwa, R.L., 1999. Investigation of the Resistance of Pile Caps to Lateral Spreading. PhD Thesis, Department of Civil Engineering, Virginia Polytechnic Institute and State University, Blacksburg, USA.

[19]Mokwa, R.L., Duncan, J.M., 2003. Rotational restraint of pile caps during lateral loading. Journal of Geotechnical and Geoenvironmental Engineering, 129(9):829-837.

[20]Ong, D.E.L., Leung, C.F., Chow, Y.K., 2009. Behavior of pile groups subject to excavation-induced soil movement in very soft clay. Journal of Geotechnical and Geoenvironmental Engineering, 135(10):1462-1474.

[21]Papadopoulou, M.C., Comodromos, E.M., 2010. On the response prediction of horizontally loaded fixed-head pile groups in sands. Computers and Geotechnics, 37(7-8):930-941.

[22]Poulos, H.G., 1995. Design of reinforcin piles to increase slope stability. Canadian Geotechnical Journal, 32(5):808-818.

[23]Poulos, H.G., Davis, E.H., 1980. Pile Foundation Analysis and Design. John Wiley & Sons, New York, NY, USA.

[24]Rajani, B.B., Morgenstern, N.R., 1993. Pipelines and laterally loaded piles in an elasto-plastic medium. Journal of Geotechnical Engineering, 119(9):1431-1447.

[25]Randolph, M.F., 1981. The response of flexible piles to lateral loading. Geotechnique, 31(2):247-259.

[26]Rollins, K.M., Lane, J.D., Gerber, T.M., 2005. Measured and computed lateral response of a pile group in sand. Journal of Geotechnical and Geoenvironmental Engineering, 131(1):103-114.

[27]Rollins, K.M., Olsen, R.J., Egbert, J.J., Jensen, D.H., Olsen, K.G., Garrett, B.H., 2006. Pile spacing effects on lateral pile group behavior: load tests. Journal of Geotechnical and Geoenvironmental Engineering, 132(10):1262-1271.

[28]Smethurst, J.A., Powrie, W., 2007. Monitoring and analysis of the bending behaviour of discrete piles used to stabilise a railway embankment. Geotechnique, 57(8):663-677.

[29]Won, J., Kulhawy, F.H., 2009. Reduction of pile head displacement for restrained-head single pile. KSCE Journal of Civil Engineering, 13(3):143-152.

[30]Xu, K.J., Poulos, H.G., 2000. General elastic analysis of piles and pile groups. International Journal for Numerical and Analytical Methods in Geomechanics, 24(15):1109-1138.