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Volume Title: ICASGE2019

DOI: ICASGE-GEO

Fathi M. Abdrabbo; Khaled E. Gaaver; Amr Z. Elwakil and Moustafa Z. Ibrahim

The paper presents two techniques to improve lateral capacity of single vertical concrete piles embedded in sand. The improvement is achieved by two methods, the first is to use jet grouting to improve soil around the pile to a specific depth and extend. The second way is to enlarge the pile diameter to a certain depth along the top part. The paper illustrates a comparison between the outcomes of two techniques to reveal the most suitable way of improvement. The study is carried out numerically throughout finite element analysis using ABAQUS 6.14 software. The simulated model is verified throughout comparison with published results of both full-scale field tests and numerical analyses. Parametric study through each technique of improvement is conducted to explore the effects of related parameters. The obtained results show that the proposed procedures of improving lateral stiffness of vertical concrete pile reveal considerable effects. Furthermore, the enhancement of ultimate lateral capacity of piles reaches about 160% and the lateral displacement decreased by 35% under the same load. All the obtained results are presented and discussed in a simplified way that can be a guide for future studies and can be used by designer engineers.

laterally; loaded; Piles; improvement; grout; enlarged diameter; Stiffness