Buy article PDF
The purchased file will be sent to you
via email after the payment is completed.
US$ 35
|
Geomechanics and Engineering Volume 37, Number 5, June10 2024 , pages 511-525 DOI: https://doi.org/10.12989/gae.2024.37.5.511 |
|
|
|
Reinforcement effect of micropile and bearing characteristics of micropiled raft according to the cohesion of soil and stiffness of pile |
||
KangIL Lee, MuYeun Kim and TaeHyun Hwang
|
||
| Abstract | ||
| Micropiled raft has been used to support the existing and new structures or to provide the seismic reinforcement of foundation systems. Recently, research on micropile or micropiled raft has been actively conducted as the usage of micropile has increased, and the reinforcement effect of pile for the raft, the pile installation methods, and methods for calculating the bearing capacity of micropiled raft have been proposed. In addition, existing research results show that the behavior of this foundation system is different depending on the pile conditions and can be greatly influenced by the characteristics of the upper or lower ground depending on the conditions of pile. In other words, considering that the micropile is a friction pile, it can be predicted that the reinforcing effect of micropile for the raft and the bearing capacity of micropiled raft may depend on the cohesion of upper soil layer depending on the pile conditions. However, existing studies have limitations in that they were conducted without taking this into account. However, existing studies have limitations as they have been conducted without considering these characteristics. Accordingly, this study investigated the reinforcing effect of micropile and the bearing characteristics of micropiled raft by varying the cohesion of upper soil layer and the stiffness of pile which affect the behavior of micropiled raft. In this results, the reinforcing effect of micropile on the raft also increased as the cohesion of soil layer increased, but the reinforcing effect of pile was more effective in ground conditions with decreased the cohesion. In addition, the relationship between the axial stiffness of micropile and the bearing capacity of micropiled raft was found to be a logarithmic linear relationship. It was found that the reinforcing effect of micropile can increase the bearing capacity of raft by 1.33~ 3.72 times depending on the cohesion of soil layer and the rigidity of pile. | ||
| Key Words | ||
| cohesion of soil; micropile; micropiled raft; numerical analysis; pile stiffness | ||
| Address | ||
| KangIL Lee and TaeHyun Hwang: Department of Civil Engineering, Daejin University, Gyeonggi-do, Korea MuYeun Kim: Department of Technology Research, IWENC. Co. Ltd., Seoul 02055, Korea | ||