预成孔植入大直径PRC管桩水平承载特性现场试验

任玉波; 王苗苗; 田叶青; 谢宏丽; 马凯; 周志军; 许超

doi:10.19818/j.cnki.1671-1637.2026.010

预成孔植入大直径PRC管桩水平承载特性现场试验

doi: 10.19818/j.cnki.1671-1637.2026.010

任玉波^1,,
王苗苗^1, ,,
田叶青¹,
谢宏丽¹,
马凯²,
周志军¹,
许超^{3, 4}

1.
长安大学公路学院，陕西西安 710064
2.
陕西鄠周眉高速公路有限公司，陕西西安 710400
3.
中交第二航务工程局有限公司，湖北武汉 430040
4.
交通运输行业交通基础设施智能制造技术研发中心，湖北武汉 430040

基金项目:

陕西省交通科技项目 23-72K

陕西省交通科技项目 24-31K

详细信息

作者简介:
任玉波(1999-)，男，山西长治人，工学博士研究生，E-mail: ryb1185@163.com

通讯作者:
王苗苗(1986-)，女，河北保定人，副教授，工学博士，E-mail: wmmcugb@163.com

中图分类号: U443.15
计量
- 文章访问数: 24
- HTML全文浏览量: 7
- PDF下载量: 9
- 被引次数: 0
出版历程
- 收稿日期: 2025-03-31
- 录用日期: 2025-08-25
- 修回日期: 2025-06-04
- 刊出日期: 2026-02-28

Field test on horizontal bearing characteristics of large-diameter PRC pipe piles installed with pre-drilled inserted method

1.
School of Highway, Chang'an University, Xi'an 710064, Shaanxi, China
2.
Shaanxi Huzhoumei Expressway Co., Ltd., Xi'an 710400, Shaanxi, China
3.
CCCC Second Harbour Engineering Company Ltd., Wuhan 430040, Hubei, China
4.
Research Center for Transportation Infrastructure Intelligent Construction in Transportation Industry, Wuhan 430040, Hubei, China

Funds:

Shaanxi Provincial Transportation Technology Project 23-72K

Shaanxi Provincial Transportation Technology Project 24-31K

More Information

Corresponding author: WANG Miao-miao, assistant professor, PhD, E-mail: wmmcugb@163.com

Article Text (Baidu Translation)

摘要

摘要: 为研究预成孔植入大直径混合配筋预应力混凝土(PRC)管桩的水平承载特性，以直径为800 mm的管桩为研究对象，通过开展现场水平静载试验，对比了预成孔植入工法和锤击打入工法下PRC管桩的位移、内力、地基抗力系数的比例系数等差异，分析了2种工法下PRC管桩的承载机制。研究结果表明：相较于锤击打入管桩，预成孔植入管桩的水平临界荷载提升了36.1 %，极限荷载与之相近；临界荷载作用下，锤击打入管桩和预成孔植入管桩的桩身转动点埋置深度分别为7.5 m和5.5 m；各桩弯矩最大截面和土抗力最大截面埋置深度一致，锤击打入管桩为5.1 m，预成孔植入管桩为3.1 m；当水平荷载小于临界荷载时，预成孔植入管桩较锤击打入管桩桩身弯矩更小，桩侧土抗力更大；2种工法下混合配筋预应力管桩的地基抗力系数的比例系数均大于规范中的推荐值，且在预成孔植入管桩中的提升幅度更为显著；m法在预成孔植入管桩水平作用效应计算中具有较好的适用性，但不适用于锤击打入管桩。预成孔植入管桩在植入过程中，砂浆沿孔壁上返时对土体的填充和渗透作用，增强了砂浆与土体之间的结合能力，增大了地基土体的水平抗力，较锤击打入管桩具有更好的位移控制能力，在桥梁等对位移控制严格的结构中有很好的应用前景。
- 桥梁工程 /
- 预成孔植入管桩 /
- 水平静载试验 /
- 大直径PRC管桩 /
- 承载机制 /
- 锤击打入管桩
Abstract: To study the horizontal bearing characteristics of large-diameter prestressed reinforced concrete (PRC) pipe piles installed with pre-drilled inserted method, the field static horizontal load tests were conducted on PRC pipe piles with an 800 mm diameter. The differences in displacement, internal forces, and proportional coefficient of foundation resistance coefficients of PRC pipe piles with pre-drilled inserted method and hammer-driven method were compared. The bearing mechanisms of PRC pipe piles with the two methods were also analyzed. The results show that compared with hammer-driven pipe pile, the horizontal critical load of pre-drilled inserted pipe pile increases by 36.1%. Their ultimate load is similar. Under the critical load, the rotation point of the pile shaft is 7.5 m for hammer-driven pipe pile and 5.5 m for pre-drilled inserted one. The depths of the maximum bending moment section and the maximum soil resistance section coincide, being 5.1 m for the hammer-driven pipe pile and 3.1 m for pre-drilled inserted one. When the horizontal load is less than the critical load, the pre-drilled inserted pipe pile exhibits smaller bending moments and greater lateral soil resistance than the hammer-driven one. The proportional coefficient of foundation resistance coefficients of PRC pipe pile with the two methods exceeds the recommended values in codes, with the pre-drilled inserted pipe pile showing more significant improvement. The m-method demonstrates good applicability in calculating horizontal load effects for pre-drilled inserted pipe pile, but is unsuitable for hammer-driven pipe pile. During the implantation of pre-drilled inserted pipe pile, the upward migration of mortar along the borehole wall fills and penetrates the soil. The bonding capacity between the mortar and soil is enhanced, the horizontal resistance of the foundation soil is increased, and a better displacement control capability is provided compared to hammer-driven pipe pile, indicating a promising application potential in structures with strict displacement requirements, such as bridges.
- bridge engineering /
- pre-drilled inserted pipe pile /
- horizontal static load test /
- large-diameter PRC pipe pile /
- bearing mechanism /
- hammer-driven pipe pile

HTML全文

图 1 PRC管桩配筋细节(单位: mm)

Figure 1. Reinforcement details of PRC pipe pile (unit: mm)

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图 2 施工流程

Figure 2. Construction process

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图 3 测试元件布置(单位: mm)

Figure 3. Layout of test component (unit: mm)

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图 4 测试元件布设过程

Figure 4. Installation process of test component

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图 5 现场静载试验

Figure 5. Field static load test

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图 6 H₀-Y₀力作用点位移曲线

Figure 6. Curves of H₀-Y₀

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图 7 H₀-ΔY₀/ΔH0曲线

Figure 7. Curves of H₀-ΔY₀/ΔH0

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图 8 H₀-θ₀转角曲线

Figure 8. Curves of H₀-θ₀

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图 9 Y-Z曲线

Figure 9. Curves of Y-Z

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图 10 弯矩分布曲线

Figure 10. Curves of bending moment distribution

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图 11 土抗力分布曲线

Figure 11. Curves of soil resistance distribution

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图 12 Y₀-m曲线

Figure 12. Curves of Y₀-m

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图 13 桩身位移计算值与试验值对比

Figure 13. Comparison between calculated and experimental values of pile shaft displacement

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图 14 桩身弯矩计算值与试验值对比

Figure 14. Comparison between calculated and experimental values of pile shaft bending moment

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图 15 开挖后的桩-土界面

Figure 15. Post-excavation pile-soil interface

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图 16 承载机制分析

Figure 16. Analysis of bearing mechanism

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表 1 土体物理力学参数

Table 1. Physical and mechanical parameters of soil

土层名称	厚度/ m	含水率/%	密度/(g· cm^-3)	黏聚力/kPa	内摩擦角/(°)	压缩模量/MPa
粉质黏土①	5.0	22.30	1.79	23.14	21.58	6.01
粉质黏土②	11.0	19.58	1.98	37.98	26.97	10.22
粉质黏土③	16.4	23.82	1.84	24.27	22.06	6.28
圆砾	1.5	13.09	1.42	2.21	37.84	30.27
粉质黏土④	11.1	24.61	1.75	27.88	24.95	7.48

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