|本期目录/Table of Contents|

[1]万志辉,陆明阳,邵智琦,等.考虑水泥土增强作用的桥梁桩基竖向承载性能试验研究[J].建筑科学与工程学报,2026,(02):120-129.[doi:10.19815/j.jace.2024.12111]
 WAN Zhihui,LU Mingyang,SHAO Zhiqi,et al.Experimental study on vertical bearing capacity of bridge pile foundation improved by cement-treated soil[J].Journal of Architecture and Civil Engineering,2026,(02):120-129.[doi:10.19815/j.jace.2024.12111]
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考虑水泥土增强作用的桥梁桩基竖向承载性能试验研究(PDF)
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《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

卷:
期数:
2026年02期
页码:
120-129
栏目:
桥隧工程
出版日期:
2026-03-30

文章信息/Info

Title:
Experimental study on vertical bearing capacity of bridge pile foundation improved by cement-treated soil
文章编号:
1673-2049(2026)02-0120-10
作者:
万志辉1,陆明阳1,邵智琦1,周峰1,戴国亮2,李俊辉1
(1. 南京工业大学 交通运输工程学院,江苏 南京 211816; 2. 东南大学 土木工程学院,江苏 南京 211189)
Author(s):
WAN Zhihui1, LU Mingyang1, SHAO Zhiqi1, ZHOU Feng1, DAI Guoliang2, LI Junhui1
(1. College of Transportation Engineering, Nanjing Tech University, Nanjing 211816, Jiangsu, China; 2. School of Civil Engineering, Southeast University, Nanjing 211189, Jiangsu, China)
关键词:
桥梁工程 后压浆桩 劲性复合桩 静载试验 提升效果 承载差异
Keywords:
bridge engineering post-grouted pile strength composite pile static load test enhancement effect bearing difference
分类号:
TU473
DOI:
10.19815/j.jace.2024.12111
文献标志码:
A
摘要:
基于连镇铁路工程项目,开展2根直径为1 000 mm、长度为44.5 m的组合后压浆桩现场试验,分析组合后压浆桩的承载变形特性和荷载传递规律,并与同一工程中不同地点开展的3根直径为1 000 mm、长度为45 m的劲性复合桩进行对比分析,研究了两种桩型承载力提升效果和承载机制的差异。结果表明:与未压浆桩相比,组合后压浆桩桩端阻力和桩侧摩阻力大幅度提高,桩端阻力提高明显,但未改变其承载类型,各土层桩侧摩阻力提高了1.91倍~2.12倍,极限承载力提高了2.01倍~2.23倍,表明组合后压浆桩能表现出更高的承载能力; 在桩顶沉降同为40 mm时,后压浆桩相对于劲性复合桩承载力提高了31.1%~36.2%,可以看出组合后压浆桩承载力增幅效果明显优于劲性复合桩; 两种桩型都是通过水泥浆液或水泥土增强桩周土体,以此来改善桩土作用力,形成新的桩-加固体-土体结构,劲性复合桩通过水泥土改善桩-土接触特性,以剪应力的形式传递上部荷载,而后压浆桩同时对桩端、桩侧进行多层加固,桩端阻力先发挥作用,通过桩身沉降使桩侧摩阻力发挥作用,形成了更加稳定的桩土结构和荷载传递体系,进而更加有效地提高桩基承载力。
Abstract:
Based on the Lianyungang-Zhenjiang high-speed railway project, two field tests of combined post-grouted piles with a diameter of 1 000 mm and a length of 44.5 m were conducted to analyze the bearing deformation characteristics and load transfer law of the combined post-grouted piles. Compared with three strength composite piles with a diameter of 1 000 mm and a length of 45 m carried out at different locations in the same project, the difference between the bearing capacity improvement effect and bearing mechanism of the two pile types was studied. The results show that compared with the ungrouted pile, the base resistance and side resistance of the combined post-grouted pile are greatly improved, and the base resistance is obviously improved, but the bearing characteristics is not changed. The side resistances of each soil layer are increased by 1.91-2.12 times, and the ultimate bearing capacities are increased by 2.01-2.23 times, indicating that the combined post-grouting piles can show higher load-bearing capacity. When the settlement of the pile head is 40 mm, the bearing capacity of post-grouted pile is increased by 31.1%-36.2% compared with that of strength composite pile. It can be seen that the bearing capacity improvement effect of post-grouted pile is obviously better than that of strength composite pile. Both pile types enhance the soil around the pile through cement grout or cement-treated soil to improve the pile-soil interaction and form a new pile-reinforced solid-soil structure. The strength composite pile improves the pile-soil contact characteristics through cement-treated soil, and transfers the upper load in the form of shear stress. But the post-grouted pile strengthens the pile end and the pile side in multiple layers at the same time, and the base resistance is first mobilized, and the side resistance is developed through the relative displacement of the pile shaft, forming a more stable pile-soil structure and load transfer system, thus more effective improving the bearing capacity of the pile foundation.

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备注/Memo

备注/Memo:
收稿日期:2024-12-05
基金项目:国家自然科学基金项目(52008100); 江苏省高校自然科学基金重大项目(23KJA560005)
作者简介:万志辉(1990-),男,工学博士,副教授,E-mail:wanzhihui@njtech.edu.cn。
通信作者:周 峰(1979-),男,工学博士,教授,博士生导师,E-mail:zhoufeng@njtech.edu.cn。
Author resume: WAN Zhihui(1990-), male, PhD, associate professor, E-mail: wanzhihui@njtech.edu.cn; ZHOU Feng(1979-), male, PhD, professor, E-mail: zhoufeng@njtech.edu.cn.
更新日期/Last Update: 2026-04-01