抗滑桩结构损伤及补强技术应用研究进展

张艺; 肖承京

doi:10.20265/j.cnki.issn.1007-2993.2024-0449

抗滑桩结构损伤及补强技术应用研究进展

doi: 10.20265/j.cnki.issn.1007-2993.2024-0449

张艺^1,,
肖承京^{1, 2, 3, ,}

1.
长江科学院材料与结构研究所，湖北武汉　430010
2.
国家大坝安全工程技术研究中心，湖北武汉　430010
3.
水利部水工程安全与病害防治工程技术研究中心，湖北武汉　430010

基金项目: 国家重点研发计划（2023YFC3007005）

详细信息

作者简介:
张　艺，女，1998年生，在读硕士研究生，主要从事结构补强加固技术研究。E-mail：zy_980610@163.com

通讯作者:
肖承京，男，1983年生，博士，正高级工程师，主要从事水工结构加固材料及工艺研究。E-mail：xiaocj@mail.crsri.cn

中图分类号: P642.22
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- 文章访问数: 14
- HTML全文浏览量: 4
- PDF下载量: 2
- 被引次数: 0
出版历程
- 收稿日期: 2024-09-29
- 修回日期: 2024-12-23
- 录用日期: 2025-03-06
- 网络出版日期: 2025-12-08
- 刊出日期: 2025-12-08

Research progress on the application of anti-slide pile structure damage and reinforcement technology

Zhang Yi^1
,,
Xiao Chengjing^{1, 2, 3
, ,}

1.
Institute of Materials and Structures, Changjiang River Scientific Research Institute, Wuhan 430010, Hubei, China
2.
National Research Center on Dam Safety Engineering Technology, Wuhan 430010, Hubei, China
3.
Research Center of Water Engineering Safety and Disaster Prevention, Ministry of Water Resources, Wuhan 430010, Hubei, China

摘要

摘要: 由于超载服役、材料老化、环境侵蚀等原因，抗滑桩结构可能会受损、失效。目前针对受损抗滑桩原位补强加固技术的研究和应用成果较少，亟待研发。通过总结现有研究和应用案例，对抗滑桩结构受力及损伤特征进行了剖析，归纳总结了抗滑桩的承载特性和损伤模式。结合实际工程情况对抗滑桩补强方法进行了系统总结，归纳了数值模拟方法在抗滑桩研究领域的应用情况，对采用数值模拟方法进行抗滑桩原位补强加固模拟的可行性进行了分析。研究成果表明：桩身注浆+植筋和扩大桩径是较为可靠的原位补强技术，数值分析方法可有效模拟受损抗滑桩原位补强过程。研究成果可为抗滑桩原位补强数值模拟研究与补强技术研发提供参考。
- 抗滑桩 /
- 抗滑桩损伤模式 /
- 抗滑桩补强措施 /
- 数值模拟
Abstract: Due to overloaded service, material aging, environmental erosion, and other reasons, anti-slide pile structures may experience failure. Currently, there is limited research and application of in-situ reinforcement techniques for damaged anti-slide piles, and the development of new reinforcement technologies is urgently needed. This paper analyzes the stress and damage characteristics of anti-slide pile structures by summarizing existing research and application cases, and generalizes the load-bearing characteristics and damage modes of anti-slide piles. A systematic summary of the reinforcement methods for anti-slide piles was conducted in light of actual engineering conditions. The application of numerical simulation methods in the field of anti-slide pile research was summarized, and the feasibility of using numerical simulation methods for in-situ reinforcement and stabilization of anti-slide piles was analyzed. The research findings indicate that grouting within the pile body combined with rebar planting and increasing the pile diameter, are reliable in-situ reinforcement techniques. Numerical analysis methods can effectively simulate the in-situ reinforcement process of damaged anti-slide piles. These conclusions offer guidance for the numerical simulation research of in-situ reinforcement for damaged anti-slide piles and provide a reference for the development of in-situ reinforcement technologies.
- anti-slide pile /
- damage modes of anti-slide piles /
- reinforcement measures for anti-slide piles /
- numerical simulation

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图 1 抗滑桩裂缝分布示意图

下载: 全尺寸图片幻灯片

表 1 抗滑桩损伤模式

结构形式	损伤原因	损伤模式
单桩结构	桩身强度不足	桩体剪切破坏或弯曲破坏
	桩身强度不足	桩体推歪或推倒
	桩侧土体承载力不足	桩间滑体流出
	桩侧土体承载力不足	桩后土体越顶
锚索抗滑桩结构	滑坡推力和桩体抗力共同作用导致	桩体塑性铰破坏
	锚杆承载力不足	锚杆失效
	土体性质导致	桩周土体的塑性失稳破坏

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表 2 抗滑桩理论补强方法

补强方法	技术方法	加固效果评价
桩身钻孔注浆加固	在桩身缺陷处钻孔利用压力进行高压注浆，使浆液填充缺陷，提高桩身强度，起到粘合、封闭和补强的作用	可灌性好、对内部钢筋扰动小、安全性高，修复效果较好。但需要设备条件，一些特殊地形无法施工，且注浆效果受桩身裂缝大小、分布以及浆液类型影响，对严重断裂的桩体效果有限
钢花管注浆加固	在桩身打孔注浆，填充裂缝和孔隙，提高桩身强度和稳定性	能对桩身裂缝进行有效填充，适用于各种地形。但需要预先钻孔，施工难度较大，材料成本较高，对抗剪强度提升有限
预应力锚索加固	在抗滑桩的适当位置安装预应力锚索，通过施加预应力提高桩身抗拉能力和整体稳定性	能显著提高抗滑桩的抗拉强度，有效限制桩顶位移及桩身变形，安全性高，适用于大位移和严重断裂的桩体。但对抗剪强度提升有限，需要预埋锚索，施工难度较大
钢筋网加固	由直径较小的钢筋组成，安装在抗滑桩的表面，增强桩体抗剪和抗裂能力，提高桩身整体性	方法施工简单，成本较低，对桩体损伤程度要求不高，但加固效果有限，对桩体裂缝和断裂的修复作用较小
植筋加固	通过植入钢筋和灌注锚固剂提高桩体的稳定性和抗滑能力	有效增强抗拉强度，但加固效果受桩身裂缝大小和分布影响，对抗剪强度提升及严重断裂的桩体效果有限
增设支挡结构	在抗滑桩周围增设挡墙或支撑结构	能有效分分担滑坡推力，提高整体稳定性，施工复杂，成本较高
扩大桩径	在适当位置通过钻孔或切割等方法扩大桩的直径，同时对桩身进行修复，提高桩体的整体强度和稳定性	有效提升抗滑桩的抗剪和承载能力，方法施工简单，安全可靠，适用于各种地形，但材料用量较大，成本相对较高。对抗拉强度提升有限
接桩法^[32]	由于设计要求或地质条件的变化，在桩顶以上或以下接长新桩，提高桩体长度及抗滑能力	提高桩体稳定性，但施工复杂，成本较高，对桩体损伤程度有一定要求

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