Open Access
ARTICLE
Influencing Factors of Load Carrying Capacity and Cooperative Work Laws of Metro Uplift Piles
Bo Liu1,*, Haoran Li1, Shuya Liu2
1 Structural Health Monitoring and Control Institute, Shijiazhuang Tiedao University, Shijiazhuang, 050043, China
2 Shenzhen Metro Group Co., Ltd., Shenzhen, 518026, China
* Corresponding Author: Bo Liu. Email: .
Structural Durability & Health Monitoring 2020, 14(3), 249-264. https://doi.org/10.32604/sdhm.2020.06482
Received 28 February 2019; Accepted 23 May 2019; Issue published 14 September 2020
Abstract
The buoyancy of groundwater can reduce the foundation bearing capacity and cause the metro tunnels to float as a whole, which threatens the safety of
structures seriously. Therefore, uplift piles are set up to improve the structural stability. In this paper, FLAC3D software is used to establish the calculation models
of pile foundation. The bearing failure process of uplift piles was simulated to
study the influencing factors on single pile load bearing capacity as well as the
cooperative work laws of pile groups. The load-displacement curves of pile top
under different length-diameter ratios, pile-soil interface characteristics and pile
types are obtained, respectively. The results showed that, increasing the lengthdiameter ratio and the pile-soil interface roughness properly can improve the bearing capacity of uplift piles. Besides, changing the shapes of constant pile section
can also improve it, which has the most significant effect concerning of saving
material cost. In the loading process of pile groups, the ultimate bearing capacity
of corner pile is the biggest, the side pile is the next, and the center pile is the
smallest. The deformation characteristics of pile top are as follows: the center pile
is the biggest, the side pile is the next, and corner pile is the smallest. Combined
with the results, the uplift resistance of group piles can be enhanced pertinently,
and the conclusions provide guidance for the design and construction of uplift
piles in the actual engineer.
Keywords
Cite This Article
Liu, B., Li, H., Liu, S. (2020). Influencing Factors of Load Carrying Capacity and Cooperative Work Laws of Metro Uplift Piles.
Structural Durability & Health Monitoring, 14(3), 249–264.
Citations