Settlement and load transfer mechanism of pile group due to side-by-side twin tunnelling

2015 ◽  
Vol 64 ◽  
pp. 105-119 ◽  
Author(s):  
Y. Hong ◽  
M.A. Soomro ◽  
C.W.W. Ng
2015 ◽  
Vol 45 ◽  
pp. 63-72 ◽  
Author(s):  
Mukhtiar Ali Soomro ◽  
Yi Hong ◽  
Charles Wang Wai Ng ◽  
Hu Lu ◽  
Siyuan Peng

2018 ◽  
Vol 55 (5) ◽  
pp. 749-757 ◽  
Author(s):  
Yaru Lv ◽  
Dongdong Zhang

This paper investigates geometrical effects on the load transfer mechanism of off-ground capped pile groups subjected to vertical load by four three-dimensional numerical simulations, including a circular single pile, an X-shaped cross-sectional concrete (XCC) single pile, a 4 × 4 circular pile group, and a 4 × 4 XCC pile group. The ultimate bearing capacities of the XCC and circular piles within pile groups are approximately 0.86 and 0.74 times that of the XCC and circular single piles, respectively. The group efficiency of the XCC pile group is mainly improved by its side resistance. Comparing the XCC pile group to the circular pile group, the increment in side resistance is almost larger than the increment in pile perimeter, indicating that the pile geometry alters the load transfer mechanism via stress concentration and lateral stress arching. A nonuniform load distribution on piles within a capped pile group causes a bending moment along the pile shafts. The bending moment of XCC piles is smaller than that of circular piles because the raft stiffness of an XCC pile group is increased by its larger circumscribing pile diameter.


2020 ◽  
Vol 222 ◽  
pp. 111088
Author(s):  
Lili Sui ◽  
Shiyong Fan ◽  
Zhenyu Huang ◽  
Wei Zhang ◽  
Yingwu Zhou ◽  
...  

2021 ◽  
Vol 226 ◽  
pp. 111427
Author(s):  
Zhenyu Huang ◽  
Xiaolong Zhao ◽  
Wei Zhang ◽  
Zhanxia Fu ◽  
Yingwu Zhou ◽  
...  

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