Some observations of the influence factors on the response of pile groups

• Published in: KSCE journal of civil engineering Vol. 19; no. 6; pp. 1667 - 1674
• Main Authors: Zhang, Qian-qing, Zhang, Shi-min, Liang, Fa-yun, Zhang, Qian, Xu, Fei
• Format: Journal Article
• Language: English
• Published: Seoul Korean Society of Civil Engineers 01.09.2015; Springer Nature B.V; 대한토목학회
• Subjects: Civil Engineering; Computer programs; Computer software; Displacement; Engineering; Field tests; Geotechnical Engineering; Geotechnical Engineering & Applied Earth Sciences; Industrial Pollution Prevention; Interactive; Iterative methods; Layered soils; Mathematical models; Multilayers; Nonlinear analysis; Pile groups; Piles; Skin friction; Soil; Soil stresses; Soils; 토목공학; a hyperbolic model; end resistance; pile groups; single pile; skin friction; settlement
• ISSN: 1226-7988; 1976-3808
• DOI: 10.1007/s12205-014-1550-7

A simplified approach for nonlinear analysis of the load-displacement response of pile groups embedded in multilayered soils is presented in this work. A hyperbolic model is used to capture the relationship between unit skin friction and pile-soil relative displacement developed along the pile-soil interface and the stress-displacement relationship developed at the pile end. Considering interactive effect among piles, the parameters related to the hyperbolic model of an individual pile in a group can be computed. As to the analysis of the response of pile groups, a highly effective iterative computer program is developed using the hyperbolic model of an individual pile in a group. The efficiency and accuracy of the present method is verified using a well-documented field test. Furthermore, a parametric study is conducted to capture the influence of pile spacing and number of piles on the load-settlement response of the pile groups connected to a rigid cap. The pile-group settlement ratio and the pile-group resistance ratio are analyzed to assess the interaction effect among individual piles.