无黏结预应力环锚衬砌力学特性原位加载试验研究

曹瑞琅; 王玉杰; 汪小刚; 齐文彪; 皮进

doi:10.11779/CJGE201908017

无黏结预应力环锚衬砌力学特性原位加载试验研究 English Version

1. 中国水利水电科学研究院流域水循环模拟与调控国家重点实验室,北京 100038;
2. 吉林省水利水电勘测设计研究院,吉林长春 130000

基金项目: 国家重点研发计划项目（2016YFC0401801,2016YFC0401804）; 国家自然科学基金项目（51709282,51674058）

详细信息

作者简介:
曹瑞琅(1985— ),男,博士,高级工程师,主要研究方向为隧道及地下工程。E-mail: Caorl@iwhr.com。

中图分类号: TU43
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出版历程
- 收稿日期: 2018-06-29
- 发布日期: 2019-08-24

Mechanical properties of pre-stressed linings with un-bonded annular anchors under high internal water pressure based on large-scale in-situ tests

1. China State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research, Beijing 100038, China;
2. Jilin Provincial Water Resources and Hydropower Consultative Company, Changchun 130000, China

摘要

摘要: 新型无黏结环锚衬砌具备预应力损失低、薄弱区小、施工便捷等优势,但因结构复杂致使力学特性不明确,阻碍了其广泛应用。依托引松工程总干线压力隧洞,开展了首次预应力环锚衬砌大型原位加载试验,明确了内水压加载过程中衬砌预应力重分布特征,揭示了环锚拉力、钢筋应力以及锚固应力损失变化规律,并探讨了围岩和环锚衬砌联合承载作用。原位试验表明：环锚衬砌整体预应力分布均匀,高效地利用了锚索高强抗拉性和混凝土抗压性,常规钢筋作用极小,因而整体可不配筋或仅构造配筋;锚具槽背后混凝土预应力稍薄弱,是高内水压作用下结构潜在破坏区域,但内水加载过程中衬砌环向、纵向预应力值趋于一致,将有效减缓预应力薄弱部位开裂倾向;环锚衬砌具备优越的抗拉和抗渗性能,可不依赖于围岩条件而独立承载,也可利用围岩部分承载以降低预应力设计值或增加结构安全裕度,它能为覆盖层薄、地质条件差且内水压力高的大直径压力隧洞长期存在的支护难问题,提供解决新途径。
- 压力隧洞 /
- 预应力衬砌 /
- 无黏结环锚 /
- 原位试验 /
- 内水压力加载
Abstract: The new type of pre-stressed lining with un-bonded annular anchors has the advantages of low prestress loss, small weak area and convenient construction. However, its mechanical properties are not clear because of its complex structure, which hinders its wide application. The first large-scale in-situ tests on the pre-stressed ring anchor linings are carried out for the Yinsong Diversion Project. The redistribution laws of the pre-stressed linings in the process of internal hydraulic loading are clarified. The variation laws of the ring anchor tension, steel bar stress and anchorage stress loss are revealed, and the combined bearing effects of the surrounding rock and linings are discussed. The in-situ tests show that the overall prestress distribution of ring anchor linings is uniform, the high-strength tension resistance of anchor cables and the compressive resistance of concrete are utilized efficiently, and the role of the conventional reinforcement bars is very small, so the reinforcement can not be distributed or constructed as a whole. The concrete prestress behind the anchor groove is slightly weak, which is the potential damage area of the structure under the action of high internal water pressure. In the process of internal water loading, the annular and longitudinal prestress values of linings tend to be consistent, which will effectively slow down the cracking tendency of the weak parts of prestressing force. The pre-stressed linings with un-bonded annular anchors have excellent tensile and impermeable properties and independent bearing capacity without depending on the surrounding rock conditions, or can use partial bearing capacity of the surrounding rock to reduce the design prestress value or increase the structural safety margin degree. It can provide a new way to solve the long-standing support problems of large-diameter pressure tunnels with thin overburden, poor geological conditions and high internal water pressure.
- pressure tunnel /
- pre-stressed lining /
- un-bonded annular anchor /
- in-situ test /
- internal water pressure loading

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参考文献(23)

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施引文献(15)

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2.	谢强，陈昱弛，王彦东，陈宣，刘畅. 无粘结预应力混凝土衬砌张拉优化方案研究. 地下空间与工程学报. 2024(S2): 811-818 . 百度学术
3.	严振瑞，刘通胜，陈震，姚广亮，李长永，赵顺波. 输水隧洞衬砌试验用高内水压加载装置研发与承载分析. 华北水利水电大学学报(自然科学版). 2022(05): 1-5 . 百度学术
4.	朱悦悦，刘成. 输水隧洞灌浆式预应力衬砌结构承载机理研究. 水利水运工程学报. 2022(06): 146-155 . 百度学术
5.	郑理峰，樊博，周虹，林俊强，张迪. 不同加载状态曲线锚索沿程预应力损失试验研究. 水利与建筑工程学报. 2022(06): 1-6 . 百度学术
6.	罗都颢，蒋思，刘建友. 大跨隧道预应力锚索承载力提升技术研究——以京张高铁八达岭长城站为例. 隧道建设(中英文). 2020(06): 873-879 . 百度学术
7.	王磊. 预应力锚索在矿山岩土边坡工程治理中的实践分析. 世界有色金属. 2019(20): 66-67 . 百度学术

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无黏结预应力环锚衬砌力学特性原位加载试验研究 English Version

作者简介: 曹瑞琅(1985— ),男,博士,高级工程师,主要研究方向为隧道及地下工程。E-mail: Caorl@iwhr.com。

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Mechanical properties of pre-stressed linings with un-bonded annular anchors under high internal water pressure based on large-scale in-situ tests

期刊类型引用(7)

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目录

作者简介:
曹瑞琅(1985— ),男,博士,高级工程师,主要研究方向为隧道及地下工程。E-mail: Caorl@iwhr.com。