Large-scale model test analysis on the behavior of Jet Grouting (JG) soil-cement-Pile strengthened pile under lateral load

• 1、College of Civil Engineering, Hohai University

Abstract：JG(Jet Grouting) soil-cement-Pile strengthened pile, simply called JPP pile, is a new sort of composite pile used in soft foundation. It may improve the vertical bearing capacity effectively, and has been practically used to a considerable scale. In order to study the behavior under lateral load, large-scale model test was carried out, using large test room made by Hohai University. It shows that JPP pile could improve horizontal bearing capacity by about 15% compared with bored concrete pile, and the biggest bending moment of JPP pile is located in the place 2m below the pile tip, and lateral earth pressure is concentrated in the top 2m soil. Meanwhile, with a cap added, JPP pile has a much higher horizontal bearing capacity. According to the formula for bored concrete pile based on m method，which standard remmends，horizontal bearing capacity of JPP pile has been calculated, and calculation results basically coincide with the experimental results. They may be useful for the practical engineering and analysis of JPP in the similar soil layer.

Keywords： JPP horizontal bearing capacity large-scale model test lateral earth pressure