Numerical Analysis of the Pile-Grout System in Soft Clay under Vertical and Lateral Load

In this paper, a numerical investigation of the effects of grout parameters on the load response of concrete pile-grout systems in soft clay is presented. The study examines the influence of grout diameter and depth on the load bearing capacity of the pile under vertical and lateral loads. The research findings indicate that grouting can enhance the load bearing capacity of a single pile system by up to 27% under vertical loads and up to 51% under lateral loads, depending on the diameter and depth of the grout used. This is due to the grout's ability to fill voids in the soil and improve the soil-pile interface, resulting in better soil-pile interaction. Additionally, the study demonstrates that increasing the diameter and depth of grout leads to a larger treated soil area and subsequently an increase in load bearing capacity. Furthermore, the research indicates a linear relationship between the amount of grout material utilized and the increase in the load bearing capacity of the pile. The study concludes that grouting is an effective method for improving the pile performance systems, particularly in soft soil conditions. The results of the research are consistent with prior studies on the use of grout material to enhance the load-carrying capacity of pile systems

ISGSR 2011 - Proceedings of the 3rd International Symposium on Geotechnical Safety and Risk

Scientific standards applicable to publication of BAWProceedings: http://izw.baw.de/publikationen/vzb_dokumente_oeffentlich/0/2020_07_BAW_Scientific_standards_conference_proceedings.pd

Analytical Analysis and Field Test Investigation of Consolidation for CCSG Pile Composite Foundation in Soft Clay

Low-grade concrete-cored sand-gravel (CCSG) pile composite foundation is a new kind of composite foundation for thick and soft clay ground treatment. An analytical solution was derived for calculating the consolidation process of this composite foundation by considering coefficients of horizontal permeability in smear zone, the radial flow within the sand-gravel shell, and the impervious property of concrete-cored pile. The results show that Terzaghi’s one-dimensional consolidation solution and the consolidation analytical solution of ordinary composite foundation were special cases of this solution. Curves of the average consolidation degree of the composite foundation under various nondimensional parameters were observed using the program based on the theoretical formula. Meanwhile, a series of in situ measurements including the settlement of pile and soil, the pore water pressure, and the total stress under embankment load were obtained on the CCSG pile composite foundation on a section of Zhenjiang-Liyang highway. The analyzed results show that the new style composite foundation patent technology has many advantages such as small differential postconstruction settlement (differential is not good, small is), reliable quality, high bearing capacity, and stability. And the consolidation of composite foundation is largely affected by the nondimensional parameters. The analytical solution is finally verified with the actual measurement data