Influence of Surcharge Load on the Adjacent Pile Foundation in Coastal Floodplain

Hao Zhang; Kai Sun

doi:10.18282/ice.v4i1.312

Hao Zhang School of Civil Engineering, Zhengzhou University, Zhengzhou 450001, China
Kai Sun School of Civil Engineering, Zhengzhou University, Zhengzhou 450001, China

Article ID: 312

784 Views, 52 PDF Downloads

DOI: https://doi.org/10.18282/ice.v4i1.312

Keywords: Soft Soil Foundation, Surcharge Load, Passive Pile, Numerical Analysis

Abstract

In this paper, in order to investigate the behavior of existing piles caused by the horizontal and compression deformation of soft substratum due to backfill surcharge on coastal floodplain, three-dimensional finite element models of piles adjacent to surcharge load were established. The deformation and migration law of soft soil was analyzed. The behavior of single pile and double row pile adjacent to surcharge load were studied, in which the influence of surcharge load location, surcharge pressure, pile stiffness, and pile top constraint conditions were considered. The results show that as the position of surcharge load is closer and the surcharge pressure increases, the response (e.g. deformation and bending moment) is more obvious. With the increase of pile stiffness, the range of passive load is increased. The deformation behavior of pile body under different constraints of pile cap is significantly different. The effect of secondary bending moment caused by pile axial force is obvious and cannot be ignored. If there is a thick soft substratum, it is beneficial to improve the behavior of adjacent piles by using cement mixing pile reinforcement.

References

DEBEER E E. The effects of horizontal loads on piles,due to surcharge or seismic effects[C]//Proc 9th ICSMFE. Tokyo,1977:547-558.

Zhang Hao, Shi Minglei, Guo Yuancheng, et al. Displacement characteristics and stress analysis of bridge foundation pile-column under side load [J]. Geotechnical Mechanics, 2017,38(09):2683-2692.

Liang Dong, Niu Bin, Gu Mu, et al. Numerical analysis of the influence of large-scale unilateral loading on piers and abutments of high-speed railway bridges [J]. Railway Architecture, 2015(01):39-42.

RANDOLPH M F. The Response of Flexible Plies to Lateral Loading [J]. Geotechnique,1981,31(2):247-259.

SPRINGMAN S M. Lateral Loading on Pile due to Embankment Construction [D]. Cambring:Cambring University,1984.

CARTER J P. Anumerical method fo pile deformations due to nearby surface loads[C]//Proceeding of the Fourth International Conference on Numercial Methods in Geomechanics Edmonton.1982: 811-817.

Wei Rulong, Wang Nianxiang, Yang Shouhua. Interaction between pile wharf and bank slope [J]. Journal of Geotechnical Engineering, 1992(06):38-49.

Wang Nianxiang. Study on numerical simulation and simplified calculation method of interaction between wharf pile foundation and bank slope [D]. Nanjing: nanjing hydraulic research institute, 1998.

Chen Fuquan, Min Yang. Numerical analysis of the behavior of adjacent pile foundations under ground loading [J]. Journal of Geotechnical Engineering, 2005(11):51-55.

KELESOGLU M K, SPRINGMAN S M. Analytical and 3D numerical modelling of full-height bridge abutments constructed on pile foundations through soft soils[J]. Computers and Geotechnics, 2011, 38(8):934-948.

Zheng Jianlong, Zhang Junhui, Li Xuefeng. Influence of Soft Foundation Bridge Head Subgrade Filling on Abutment Piles [J]. china journal of highway and transport, 2013,26(02):48-55.