[1]袁华智,陈明杰,赵 坤,等.斜坡条件下土压力对排桩基础水平承载特性影响[J].长安大学学报(自然科学版),2025,45(2):126-135.[doi:10.19721/j.cnki.1671-8879.2025.02.011]
　YUAN Hua-zhi,CHEN Ming-jie,ZHAO Kun,et al.Impact of soil pressure on horizontal load-bearing properties of row piles basis under slope conditions[J].Journal of Chang’an University (Natural Science Edition),2025,45(2):126-135.[doi:10.19721/j.cnki.1671-8879.2025.02.011]
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斜坡条件下土压力对排桩基础水平承载特性影响()
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长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]

卷:
第45卷
期数:
2025年2期
页码:
126-135
栏目:
桥梁与隧道工程
出版日期:
2025-03-31

文章信息/Info

Title:
Impact of soil pressure on horizontal load-bearing properties of row piles basis under slope conditions
文章编号:
1671-8879(2025)02-0126-10
作者:
袁华智1; 2; 3; 陈明杰1; 赵 坤1; 李旭升1; 王正振1; 2; 3; 韦正德1; 2; 3; 曹 铭4
(1. 兰州理工大学 土木工程学院,甘肃 兰州 730050; 2. 兰州理工大学 西部土木工程防灾减灾教育部工程研究中心,甘肃 兰州 730050; 3. 兰州理工大学 甘肃省土木工程防灾减灾重点实验室,甘肃 兰州 730050; 4. 庆阳职业技术学院 智能工程系,甘肃 庆阳 745000)
Author(s):
YUAN Hua-zhi1; 2; 3;  CHEN Ming-jie1;  ZHAO Kun1;  LI Xu-sheng1;  WANG Zheng-zhen1; 2; 3; WEI Zheng-de1; 2; 3;  CAO Ming4
关键词:
桥梁工程;  排桩基础;  数值模拟;  土压力;  水平承载力;  斜坡条件
Keywords:
bridge engineering;  row piles basis;  numerical simulation;  soil pressure;  horizontal load-bearing capacity;  slope condition
DOI:
10.19721/j.cnki.1671-8879.2025.02.011
文献标志码:
A
摘要:
基于物理相似原理,依据实际工程,开发等比缩放(1:80)室内试验场景,分析斜坡条件下土压力对排桩基础水平承载力的影响。根据弹塑性理论和摩尔-库伦准则,采用主-从接触算法设定边界条件,选取自适应划分网格的方法,建立排桩基础与周围土体相互作用的有限元模型,对等比缩放室内试验进行验证,并分析斜坡倾角、嵌固深度及桩间距对排桩水平承载能力的影响。研究结果表明:当斜坡倾角从30°增加到60°时,桩水平承载力从2.68 kPa增加到3.18 kPa; 当嵌固深度从0增加到300 mm时,桩水平承载力从0增加到3.18 kPa; 当桩间距从150 mm增至210 mm时,桩身最大弯矩由0.28 N·m增加至0.34 N·m,最大弯矩由距桩顶78 mm处向距桩顶116 mm处移动; 当桩身嵌固深度为300 mm、斜坡倾角为60°时,桩身弯矩达到最大值0.65 N·m; 随着斜坡倾角的增大,桩的水平承载能力降低,桩身稳定性下降; 当嵌固深度较大时,深层土体的水平承载力得到有效利用,桩身稳定性增强; 排桩的水平承载力与桩间距成反比,随着桩间距增大,相邻桩之间的相互作用下降,适当减少桩间距可以有效提高排桩整体承载力。
Abstract:
Based on the principle of physical similarity and the actual project, the indoor test scene was developed as the equal-scale was 1:80, and the influence of soil pressure on the horizontal bearing capacity of row piles basis under slope condition was analyzed. According to the elastoplastic theory and Mohr-Coulomb criterion, the master-slave contact algorithm was used to set the boundary condition, the method of adaptive meshing was selected, the finite element model of mutual interaction between the row piles basis and the surrounding soil was established. The equal-scale indoor test was verified, and the influences of slope angle, embedded depth and pile spacing on the horizontal load-bearing capacity of row piles were analyzed. The results show that when the slope angle increases from 30° to 60°, the horizontal load-bearing capacity of the pile increases from 2.68 kPa to 3.18 kPa. When the embedded depth increases from 0 to 300 mm, the horizontal load-bearing capacity of the pile increases from 0 to 3.18 kPa. When the pile spacing increases from 150 to 210 mm, the maximum pile bending moment increases from 0.28 N·m to 0.34 N·m. The maximum pile bending moment moves from the point which is 78 mm to the top pile to the other point which is 116 mm to the top pile. When the embedded depth is 300 mm and the slope angle is 60°, the pile bending moment of the pile reaches the maximum value of 0.65 N·m. With the increasing of slope angle, the horizontal load-bearing capacity of pile decreases and the stability decreases. When the embedded depth is larger, the horizontal load-bearing capacity of deep soil is effectively utilized, and the stability enhances. The horizontal load-bearing capacity of row piles are inversely proportional to the pile spacing. With the increasing of pile spacing, the interaction between adjacent piles decreases. The appropriate reduction of pile spacing can effectively improve the overall load-bearing capacity of row piles.4 tabs, 14 figs, 26 refs.

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备注/Memo

备注/Memo:
收稿日期:2024-08-20
基金项目:国家自然科学基金项目(52368055); 兰州理工大学红柳优秀青年人才支持计划项目; 甘肃省高校教师创新基金项目(2025B-534)
作者简介:袁华智(1982-),男,江苏泰州人,副教授,工学博士,E-mail:yuanhz@lut.edu.cn。
通信作者:王正振(1989-),男,甘肃白银人,副教授,工学博士,E-mail:wangzz@lut.edu.cn。
更新日期/Last Update: 2025-04-01