Experimental and Numerical study Behaviors on Single Cement Flyash Gravel pile under the combined effect of axial compression and Lateral load

Abstract

A CFG Cement, Fly-ash and Gravel piles are one of the most popular approaches in geotechnical engineering for load transfer in soft soil and ground improvement in railway, road embankment, high rise building. Its behaviors are like as semi-rigid types of the pile. The analysis and computation of ultimate axial compression load and lateral load in soft soil experiments were conducted in a laboratory to obtaining the response of a single CFG pile. The experimental model of CFG pile is made up of cement fly ash and gravel cast in situ types ascertained using physical scaling fundamental, based on material size, properties, a grade of Mix and prototype of pile foundation. Moreover, the in-situ bored CFG piles have been cast in 70 mm and 100 mm external diameters for Laboratory tests. Hence the different CFG pile lengths are considered for variable L/D ratios. All the experiments were performed on soft clay under independent axial compression and lateral load test; it is also to investigate the combined effect of axial compression and lateral load. It has been observed that the behavior of CFG piles under independent individual loading is significantly different when compared with combined loading. It also derives the relationship between the ultimate load in axial compression and lateral loading as well as in the combined effect of loading. It observed that the ratio of ultimate lateral load and axial load in individual to combined loading are significantly increasing. However, the CFG pile vertical deflection/Lateral displacement at considering with its safe factor of lateral load/axial compression was increasing effectively. In addition to determining the safe axial load / lateral load that has been considering in the present study may be required for design limiting displacement/deflection failure criteria of the CFG pile effectively under combined load. It is noted that the CFG pile imposition with combined loading can substantially improve the soil properties and can lead to the economy in the design of foundations.