Centrifuge study on behavior of rigid pile composite foundation under embankment in soft soil
- PDF / 2,199,914 Bytes
- 13 Pages / 595.276 x 790.866 pts Page_size
- 27 Downloads / 221 Views
(0123456789().,-volV)(0123456789(). ,- volV)
RESEARCH PAPER
Centrifuge study on behavior of rigid pile composite foundation under embankment in soft soil Jian-lin Yu1,2
•
Jia-jin Zhou1,2 • Xiao-nan Gong1,2 • Ri-qing Xu1,2 • Jun-yuan Li3 • Shan-dai Xu1,2
Received: 25 December 2019 / Accepted: 6 November 2020 Ó Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract The rigid pile composite foundation is widely used in highway projects in soft soil area as it can effectively increase the bearing capacity and stability of the foundation. While the research on the behavior and failure mode of rigid pile composite foundation under embankment is not enough, instability failure of rigid pile composite foundation often occurs in practical projects. This paper presents a centrifuge model test to investigate the load transfer mechanism, settlement characteristic and failure mode of rigid pile composite foundation under embankment. The test results show that: the soil displacement of different region in rigid pile composite foundation was different, obvious vertical displacement occurred in the soil under the center of embankment and the horizontal displacement was very small in this region; both vertical and horizontal displacement occurred in the soil under the shoulder of embankment; and obvious horizontal displacement occurred in the soil under the slope toe of embankment; moreover, ground heave also occurred near the slope toe of embankment. The soil displacement in rigid pile composite foundation had a large influence on the stress characteristic and failure mode of rigid piles, the compressive failure and bending failure would probably occur for the piles under the center and shoulder of the embankment, respectively, and the tension-bending failure would probably occur for the piles under the slope toe of embankment. The different failure modes of piles at different regions should be considered in the design of rigid pile composite foundation under embankment. The test results can be used to improve the design method for rigid pile composite foundation under embankment in practical projects. Keywords Centrifuge model test Embankment Failure mode Rigid pile composite foundation Soft soil
1 Introduction The rigid pile composite foundation is widely used in expressway and high-speed railway projects because of its high bearing capacity, little post-construction settlement and rapid construction speed [7, 19, 31]. The behavior of composite foundation under embankment has been investigated by many researchers through theoretical methods [1, 6, 9, 13, 26, 27, 29, 33, 41, 45] and numerical methods & Jia-jin Zhou [email protected] 1
Research Center of Coastal and Urban Geotechnical Engineering, Zhejiang University, Hangzhou 310058, China
2
Zhejiang Urban Underground Space Development Engineering Research Center, Zhejiang University, Hangzhou 310058, China
3
Taizhou Transportation Bureau, Taizhou 318000, China
[11, 16, 17, 20, 30, 40, 42, 43]. Moreover, field tests [3, 4, 32, 38, 39, 44], mo
Data Loading...
