侯振坤,陈炫霖,唐孟雄,等.预应力混凝土管桩桩端侧后注浆理论及承载特性研究进展综述[J].河南理工大学学报(自然科学版)，doi:10.16186/j.cnki.1673-9787.2024030056.

HOU Z K,CHEN X L,TANG M X,et al．A review of research progress on the theory and bearing characteristics of post grouting at the end and side of prestressed concrete pipe piles[J].Journal of Henan Polytechnic University(Natural Science)，doi:10.16186/j.cnki.1673-9787.2024030056.

预应力混凝土管桩桩端侧后注浆理论及承载特性研究进展综述(网络首发)

侯振坤¹，陈炫霖¹，唐孟雄^2,3，凌造²，都喜东⁴，徐峰⁵，贺绍阳⁶，梁仕华¹

（1.广东工业大学 土木与交通工程学院，广东 广州 510006；2.广州建筑股份有限公司，广东 广州 510030；3.广州市建筑集团有限公司，广东广州 510030；4.昆明理工大学 国土资源工程学院，云南 昆明 650093；5.招商局重庆交通科研设计院有限公司，重庆 400067；6.湖南国涛建设工程有限公司，湖南 岳阳 414000）

摘要: 目的 管桩后注浆是一种能有效改善桩-土接触界面物理力学性质的技术手段，在提高管桩摩阻力、减少上部结构沉降等方面发挥着巨大的作用。 方法 本文通过对管桩后注浆工艺、后注浆理论、管桩注浆后的承载性能、管桩-注浆体-土接触界面剪切性能等进行了综述，对管桩后注浆的发展方向进行了展望。 结果 （1）后注浆对提高中小直径管桩承载力有一定的作用；注浆后，中掘法管桩的承载力一般超过了4 000 kN、静钻根植竹节桩的承载力可提升20%以上、随钻跟管桩承载力普遍超过20 000 kN。（2）现有的注浆理论推动了注浆技术的发展，虽然相关研究成果与工程实践存在差异，但可以给出浆液扩散的初步轮廓和扩散的范围，为注浆设计和工程应用提供科学指导。（3）桩-浆-土接触界面的研究大多以剪切试验为载体，研究浆-土接触界面剪切性能这一宏观表象，很少涉及到注浆液以注浆根系、爪牙和毛细爪牙的形式伸入土体并与土体进行关键离子交换从而提高桩-浆-土接触界面黏结强度的宏微观扩散本质。（4）现有的注浆研究大多止步于注浆结果分析，较少涉及到注浆机理层面，对浆液在地层中的流动扩散规律认识不清。 结论 桩侧注浆液渐进性流动过程可视化分析、注浆体三维尺寸定量表征、管桩注浆过程智能化监测、新型的管桩桩侧注浆工艺的研发是未来管桩桩侧后注浆发展的重要方向。

关键词:管桩；后注浆；承载特性；加固机理；注浆工艺

doi:10.16186/j.cnki.1673-9787.2024030056

基金项目: 国家自然科学基金项目(52378332，52208336)；广州建筑股份有限公司科技计划项目/广州市建筑集团有限公司科技计划项目（[2022]-KJ002）；广东省自然科学基金项目（2023A1515012826）；广州市科技计划项目（2024A04J3902）;广东省住房和城乡建设厅科技创新计划（2023-K26-564565）；云南省基础研究计划项目（202401AT070406，202101BE070001-039）

收稿日期：2024-03-20

修回日期：2024-06-14

网络首发日期：2024-06-26

A review of research progress on the theory and bearing characteristics of post grouting at the end and side of prestressed concrete pipe piles（Online）

HOU Zhenkun¹,CHEN Xuanlin¹,TANG Mengxiong^2,3,LING Zao²,DU Xidong⁴,XU Feng⁵,HE Shaoyang⁶,LIANG Shihua¹

(1.School of Civil and Transportation Engineering,Guangdong University of Technology,Guangzhou 510006,Guangdong,China; 2.Guangzhou Construction Engineering Co.,Ltd.,Guangzhou510030,Guangdong,China; 3.Guangzhou Municipal Construction Group Co.,Ltd.,Guangzhou,Guangdong 510030,China; 4.Faculty of Land Resources Engineering,Kunming University of Science and Technology,Kunming 650093,Yunnan,China; 5.China Merchants Chongqing Communications Research & Design Institute Co.,Ltd.,Chongqing 400067,China; 6.Hunan Guotao Construction Engineering Co.,Ltd.,Yueyang 414000，Hunan，China)

Abstract: Objectives Post-grouting of pipe piles is a technical means that effectively improves the physical and mechanical properties of the pile-soil interface,playing a significant role in increasing the frictional resistance of pipe piles and reducing settlement of the upper structure. Methods Post-grouting technology,post-grouting theory,the bearing performance of pipe piles after grouting,and the shear performance of the soil-pile interface in pipe pile grouting are examined and the future development direction of post-grouting for pipe piles are explored in this article. Results (1) Post-grouting has a certain effect on improving the bearing capacity of small and medium-sized diameter pipe piles.After grouting,the bearing capacity of intermediate excavation method pipe piles generally exceeds 4 000 kN.Moreover,the bearing capacity of static drilling and planting bamboo joint piles can increase by over 20%,while the bearing capacity of drilling and pipe piles typically exceeds 20 000 kN.(2) The existing grouting theory has advanced the development of grouting technology.Despite disparities between relevant research findings and engineering practices,it offers a preliminary framework and scope for slurry diffusion.This furnishes scientific guidance for grouting design and engineering applications.(3) Most studies on the interface between pile slurry and soil rely on shear tests to examine the macroscopic behavior of this interface.However,they seldom delve into the macro and micro diffusion essence of grouting fluid extending into the soil in the form of grouting roots,claws,and capillary claws.Additionally,these studies rarely address the exchange of key ions with the soil to enhance the bond strength of the pile slurry-soil interface.(4) Current research on grouting primarily centers on analyzing grouting outcomes,with limited exploration of grouting mechanisms.Consequently,there's a lack of clear comprehension regarding the flow and diffusion laws of grout in the formation. Conclusions Visual analysis of the progressive flow process of grouting fluid along the pile side,quantitative characterization of the three-dimensional geometric dimensions of the grouting body,intelligent monitoring of the pipe pile grouting process,and the advancement of novel pipe pile side grouting techniques are crucial avenues for the future evolution of pipe pile side post-grouting.

Key words: pipe piles; post-grouting; bearing characteristics; experimental study; reinforcement mechanism；grouting technique