Finite Element Analysis of Cushion Thickness and Ultimate Bearing Capacity of Lime Soil Pile Composite Foundation

Abstract:

The static load test of composite foundation was simulated by using the nonlinear finite element programs, and the changes of the pile-soil stress ratio and the pile and soil settlements as well as the plastic deformation of composite foundation were analyzed. The simulation results show that: the cushion of flexible pile composite foundation can effectively regulate the pile-soil stress ratio and make the bearing capacity of the lime soil pile and the soil between piles give full play at the same time. The cushion has a distinct role in reducing the pile settlements, however, has little effect in reducing the soil settlements. The reasonable cushion thickness is about 300mm. The composite foundation will emerge local shear failure when it reaches the ultimate bearing capacity. Reducing the pile spacing can increase the ultimate bearing capacity, and the rate of increase shows a gradually increasing trend.

• Periodical: Advanced Materials Research (Volumes 594-597)
• Pages: 565-569
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.594-597.565
• Online since: November 2012
• Authors: Zi Sen Wei*, Yong Mou Zhang, Dong Hui Peng
• Keywords: Composite Foundation, Cushion, Finite Element, Lime Soil Pile, Ultimate Bearing Capacity

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