Numerical simulation and analysis on the factors affecting the Bearing Capacity of bag-grouting-pile composite foundation
DOI:
https://doi.org/10.26821/IJSHRE.12.9.2024.120906Keywords:
bag grouting pile, composite foundation, affecting factors, numerical simulationAbstract
In order to study the key factors affecting the bearing capacity of bag-grouting-pile composite foundation (BGP-CF), numerical simulation and field test were conducted under the background of a subgrade project in which BGP was used to reinforce the subgrade, a model for calculating pile-soil parameters for BGP-CF was built, the results of numerical simulation were compared and verified against those of field test, and the effects of pile diameter, pile length, grouting pressure and the coefficient of friction at pile-soil interface on the bearing capacity of BGP-CF were analyzed. The results of comparison and verification indicate that the bearing characteristics of BGP-CF can be simulated and reproduced effectively by means of numerical simulation. The results of numerical simulation show that the bearing capacity of BGP-CF can be improved slightly by increasing pile diameter and grouting pressure, and can be increased significantly by increasing pile length, and particularly, by ensuring that the lower pile end is located in tight soil and by increasing the coefficient of friction at pile-soil interface.
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