Comparative Study of Existing Cement Fly Ash Gravel pile and Encased Stone Column Composite Foundation

Abstract

The Cement Fly Ash and Gravel (CFG) Pile and Encased Stone Column (ESC) are the ground improvement techniques. The main object of the study is to the numerical analysis of the Both techniques pile group were used to support the Embankment with and without the geotextile both techniques composite foundation by the Finite Element method under static and dynamic load analysis. Numerical simulation has been carried out in Plaxis 3D. A case study from china’s highspeed embankment supported by CFG and ESC have investigated the load caring capacity by soil and pile. While the failure behaviors, settlement, excess pore pressure, and lateral behavior with variable embankment loading and number of geosynthetic effect moreover, the diameter of CFG piles and ESC at various locations in an embankment has been varied to study its influence on the load distribution among the CFG piles/ESC and lateral load displacement of the pile group. The results show that increasing the diameter of both techniques reduced the total settlement and differential settlement of embankment. It observed that the seismic load has a significant effect on the vertical and lateral displacement.

New Foundation Treatment Technology Using Cement Soil Composite Tubular Piles Supported by Optical Fiber Sensing Technology

“…There is a great relationship between the vertical bearing capacity of composite piles and the failure forms of composite piles. The failure forms of composite piles have four primary cases [21]: compression failure occurs at the upper part of tubular piles, relative sliding failure occurs at the side of cement soil piles, large sliding failure occurs between cement soil piles and tubular piles, and failure occurs when foreign matters penetrate the pile ends. Currently, the calculation equation involving long core composite piles is as follows [22].…”

Three-Dimensional Discrete Element Analysis of Bearing Characteristics of Concrete–Cored Sand–Gravel Pile Composite Foundation under Cyclic Dynamic Load

“…A pile composite foundation is an effective means of weak foundation treatment, different pile types can cope with different types of natural foundations, and its construction is convenient and cost-effective; therefore, it has been widely used in the actual works of weak foundation treatment [1][2][3][4][5][6]. Cyclic dynamic loading is one of the main influencing factors of deformation produced by foundation soil.…”