微观负泊松比锚杆静力学特性及其工程应用研究

doi:10.16285/j.rsm.2021.0426

岩土力学 ›› 2022, Vol. 43 ›› Issue (3): 808-818.doi: 10.16285/j.rsm.2021.0426

微观负泊松比锚杆静力学特性及其工程应用研究

陶志刚^{1, 2}，郭爱鹏^{1, 2}，何满潮^{1, 2}，张瑨³，夏敏⁴，王鼎^{1, 2}，李梦楠^{1, 2}，朱珍^{1, 5}

1. 中国矿业大学（北京）力学与建筑工程学院，北京 100083；2. 中国矿业大学（北京）深部岩土力学与地下工程国家重点实验室，北京 100083；3. 河海大学岩土力学与堤坝工程教育部重点实验室，江苏南京 210098；4. 同济大学土木工程学院，上海 200092； 5. 青岛理工大学土木工程学院，山东青岛 266033

收稿日期:2021-03-25 修回日期:2021-12-15 出版日期:2022-03-22 发布日期:2022-03-23
通讯作者: 郭爱鹏，男，1993年生，博士研究生，主要从事隧道及地下工程支护方面研究。E-mail: guoaipeng0422@163com E-mail: taozhigang1981@163.com
作者简介:陶志刚，男，1981年生，博士，副教授，博士生导师，主要从事岩体力学与工程灾害控制理论研究和教学工作。
基金资助:
国家自然科学基金项目资助（No.41941018）；第二次青藏高原综合科学考察研究资助（No.2019QZKK0708）；深部岩土力学与地下工程国家重点实验室开放基金（No.SKLGDUEK2024）

Static characteristics and engineering applications of micro negative Poisson’s ratio bolt

TAO Zhi-gang^{1, 2}, GUO Ai-peng^{1, 2}, HE Man-chao^{1, 2}, ZHANG Jin³, XIA Min⁴, WANG Ding^{1, 2}, LI Meng-nan^{1, 2}, ZHU Zhen^{1, 5}

1. School of Mechanics and Civil Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China; 2. State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China; 3. Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing, Jiangsu 210098, China; 4. College of Civil Engineering, Tongji University, Shanghai 200092, China; 5. School of Civil Engineering, Qingdao University of Technology, Qingdao, Shandong 266033, China

Received:2021-03-25 Revised:2021-12-15 Online:2022-03-22 Published:2022-03-23
Supported by:
This work was supported by the National Natural Science Foundation of China (NSFC)(41941018), the Second Tibetan Plateau Scientific Expedition and Research(2019QZKK0708) and the Foundation for the Opening of State Key Laboratory for Geomechanics & Deep Underground Engineering (SKLGDUEK2024).

摘要/Abstract

摘要： 相比于传统的小变形锚杆支护材料，负泊松比锚杆/索材料具有大伸长量、高强高韧、高恒阻力、吸能等优异力学特性。在宏观负泊松比（NPR）锚杆/索研究和应用基础上，何满潮研发了新一代微观NPR钢材料和微观NPR锚杆。目前微观NPR钢材料的静力学特性研究较少，微观NPR锚杆在城市地下隧道工程的适用性有待于现场应用验证。通过室内静力拉伸试验对微观NPR钢的力学特性进行了研究，结果表明本批次微观NPR钢平均伸长率为34.68%；恒阻力值范围为203.9～ 240.7 kN；拉伸全过程表现为均匀拉伸变形；无屈服平台，破断时无明显颈缩现象。通过理论推导，建立了微观NPR锚杆在微静力拉伸条件下的弹塑性增量本构模型。以某路地铁站风道段为工程背景，介绍了微观NPR锚杆施工工艺，现场测试了极限拉拔力、伸长率及锚杆轴力等方面，结果表明，微观NPR锚杆具有高恒阻力及大伸长量等优势。在围岩大变形隧道开展了支护应用试验，验证了其具有良好的围岩大变形控制效果。

关键词: 微观NPR锚杆, 静力学特性, 本构模型, 现场试验

Abstract: Compared with traditional small deformation bolt materials, the negative Poisson's ratio (NPR) bolt/cable material has excellent mechanical properties such as large elongation, high strength, high toughness, high constant resistance, and energy absorption. Based on the research and application of macro-NPR bolts/cables, He Manchao developed a new type of micro-NPR steel material and a new type of micro-NPR bolt. At present, there are few studies on the static characteristics of the micro-NPR steel, and the applicability of the micro-NPR anchor in urban underground tunnel engineering needs to be verified by field tests. The mechanical properties of the micro-NPR steel were studied by the static tensile test in laboratory. The results show that the average elongation ratio of this batch of micro-NPR steel is 34.68%, and the constant resistance range is 203.9～240.7 kN. The tensile deformation is uniform in the whole process, and there is no yielding platform and no obvious necking when breaking. Through theoretical derivation, the elastoplastic incremental constitutive model of the micro-NPR bolt under micro-static tensile condition was established. Taking the air duct section of a subway station as the engineering background, this paper introduced the construction technology of the micro-NPR bolt, and tested the ultimate pull-out force, elongation ratio, and axial force on site. The results show that the micro-NPR bolt has the advantages of high constant resistance and large elongation. The application test of the bolt supporting was carried out in the tunnel with the large-deformation surrounding rock, and the large deformation control effects of the surrounding rock were verified.

Key words: micro-NPR bolt, static characteristics, constitutive model, field test

中图分类号:

TU353

陶志刚, 郭爱鹏, 何满潮, 张瑨, 夏敏, 王鼎, 李梦楠, 朱珍, . 微观负泊松比锚杆静力学特性及其工程应用研究[J]. 岩土力学, 2022, 43(3): 808-818.

TAO Zhi-gang, GUO Ai-peng, HE Man-chao, ZHANG Jin, XIA Min, WANG Ding, LI Meng-nan, ZHU Zhen, . Static characteristics and engineering applications of micro negative Poisson’s ratio bolt[J]. Rock and Soil Mechanics, 2022, 43(3): 808-818.

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微观负泊松比锚杆静力学特性及其工程应用研究

Static characteristics and engineering applications of micro negative Poisson’s ratio bolt

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