Uplift Bearing Capacity of Squeezed Branch Pile Group

被引：2
|
作者：
Wang, Dehong [1 ,2 ]
Ju, Yanzhong [1 ,2 ]
Song, Mingze [3 ]
Zhao, Jian [1 ]
Bai, Junfeng [1 ,2 ]
机构：
[1] Northeast Elect Power Univ, Sch Civil Engn & Architecture, Jilin, Jilin, Peoples R China
[2] Northeast Elect Power Univ, Key Lab Elect Power Infrastruct Safety Assessment, Jilin, Jilin, Peoples R China
[3] Huizhou Power Supply Bur Guangdong Power Grid Cor, Huizhou, Peoples R China
来源：
GEOTECHNICAL AND GEOLOGICAL ENGINEERING | 2023年 / 41卷 / 01期
关键词：
Squeezed branch pile group; Uplift bearing capacity; Horizontal to uplift load ratio; Pile spacing; Field test; NUMERICAL-SIMULATION; LATERAL RESPONSE; VERTICAL LOADS; FIELD-TEST;
D O I：
10.1007/s10706-022-02279-3
中图分类号：
P5 [地质学];
学科分类号：
0709 ; 081803 ;
摘要：
To investigate the uplift performance of squeezed branch pile group under vertical and horizontal loads, field test of a 2 x 2 squeezed branch pile group designed according to the load of a 1000 kV ultra-high vacuum tower foundation was carried out. Parametric studies were performed by using the finite element analysis to study the influence of horizontal to uplift load ratio and pile spacing on the bearing characteristics of squeezed branch pile group. The results showed that the uplift ultimate bearing capacity of the 2 x 2 single squeezed branch pile group was increased by 60% compared to the traditional equal diameter pile group. When the pile spacing reached 4 times diameter of pile, the branch resistance and the friction resistance of the pile were fully utilized. Based on the axial force of the back row piles subjected to the following conditions, namely that of applying a single uplift load and a horizontal uplift load, a formula for calculating the adjustment coefficient of uplift capacity under horizontal load is proposed.
引用
收藏
页码：283 / 293
页数：11
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