Mechanical tests and engineering applicability of fibre plastic concrete used in tunnel design in active fault zones

Zhao Kun; Chen Weizhong; Yang Diansen; Zhao Wusheng; Wang Shanyong; Song Wanpeng

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Mechanical tests and engineering applicability of fibre plastic concrete used in tunnel design in active fault zones

机译：活动断层带隧道设计中纤维塑料混凝土的力学性能测试及工程适用性

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Articulated design is considered an effective anti-fault measure to prevent damage to tunnel lining caused by fault movement. A new type of plastic concrete was developed for the Xianglu mountain tunnel of the water diversion project in Yunnan Province. The effectiveness of this concrete was verified by laboratory tests and numerical simulations. The mechanical characteristics of this new type of fibre plastic concrete were identified through mechanical testing. The optimal fibre volume fraction (around 0.2%) was obtained and could increase the compressive strength, splitting tensile strength, ductility and toughness without causing a significant decrease in the elastic modulus. The internal forces and plastic strain of the lining under the action of strike-slip faulting were analysed by using the finite element method. The role of fibre plastic concrete as a flexible joint material to accommodate bending and shear deformation was studied. The results showed that the plastic strain was mostly concentrated in the flexible joints, where the fibre plastic concrete with favourable ductility and toughness properties absorbed the deformation, protecting the rigid segments from complete destruction. The fibre plastic concrete maintained its considerable integrity and strength and would not suddenly droop when subjected to bending-shear and tensile-compressive loads due to the cementation between the PVA fibre and the matrix. The characteristics mentioned above would facilitate maintenance of the tunnel after an earthquake and can provide a reference for the engineering of other anti-faulting designs.

机译：铰接式设计被认为是防止断层运动对隧道衬砌造成损害的有效防故障措施。云南省引水工程香鹭山隧道开发了一种新型的塑性混凝土。通过实验室测试和数值模拟验证了这种混凝土的有效性。通过机械测试确定了这种新型纤维塑料混凝土的机械特性。获得了最佳的纤维体积分数（约0.2％），可以增加抗压强度，劈裂拉伸强度，延展性和韧性，而不会引起弹性模量的显着降低。利用有限元方法分析了走滑断层作用下衬砌的内力和塑性应变。研究了纤维混凝土作为柔性接头材料以适应弯曲和剪切变形的作用。结果表明，塑性应变主要集中在挠性接缝处，具有良好延展性和韧性的纤维塑料混凝土吸收了变形，从而保护了刚性节段不受完全破坏。纤维混凝土保持了相当大的完整性和强度，并且由于PVA纤维与基体之间的胶结作用，在承受弯曲剪切和拉伸压缩载荷时不会突然下垂。上述特性将有助于地震后隧道的维护，并可为其他防断层设计的工程设计提供参考。

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来源
《Tunnelling and underground space technology》 |2019年第6期|200-208|共9页
作者
Zhao Kun; Chen Weizhong; Yang Diansen; Zhao Wusheng; Wang Shanyong; Song Wanpeng;
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作者单位

Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Hubei, Peoples R China|Univ Chinese Acad Sci, Beijing 100049, Peoples R China;

Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Hubei, Peoples R China|Shandong Univ, Res Ctr Geotech & Struct Engn, Jinan 250061, Shandong, Peoples R China;

Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Hubei, Peoples R China;

Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Hubei, Peoples R China|Univ Chinese Acad Sci, Beijing 100049, Peoples R China;

Univ Newcastle, Fac Engn & Built Environm, ARC Ctr Excellence Geotech Sci & Engn, Callaghan, NSW, Australia;

Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Hubei, Peoples R China|Univ Chinese Acad Sci, Beijing 100049, Peoples R China;

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原文格式 PDF
正文语种 eng
中图分类
关键词
Fibre plastic concrete; Articulated design; Mechanical test; Numerical simulation;

机译：纤维混凝土;铰接设计;机械试验;数值模拟;

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1. In situ hydraulic tests in the active fault survey tunnel, Kamioka Mine, excavated through the active Mozumi-Sukenobu Fault zone and their hydrogeological significance [J] . Nohara T, Tanaka H, Watanabe K, The island arc . 2006,第4期

机译：活跃的断层勘查隧道Kamioka矿通过活跃的Mozumi-Sukenobu断层区开挖的现场水力测试及其水文地质意义
2. Analysis of longitudinal profile of the tunnels in the active faulted zone and designing the flexible lining (for Koohrang-III tunnel) [J] . A.R. Shahidi, M. Vafaeian Tunnelling and underground space technology . 2005,第3期

机译：活动断层带隧道的纵剖面分析和柔性衬砌设计（Koohrang-III隧道）
3. Application of two-level design method on subway tunnel crossing active fault: a case study on Urumqi subway tunnel intersected by reverse fault dislocation [J] . An S., Tao L. J., Han X. C., Bulletin of engineering geology and the environment . 2021,第5期

机译：双层设计方法在地铁隧道交叉活性故障中的应用 - 以逆向故障脱位对乌鲁木齐地铁隧道的案例研究
4. Influence of test methodology on the applicability of test results of fibre reinforced concrete for design [C] . Karoly Peter Juhasz, Peter Schaul, Ralf Winterberg International Workshop on Fibre Reinforced Concrete . 2018

机译：试验方法对纤维增强混凝土测试结果适用性的影响
5. Design and Construction of a Wind Tunnel Model with Active Variable Camber Continuous Trailing Edge Flap for Aeroelastic 'In-flight' Shape Optimization Tests [D] . Precup, Nathan 2018

机译：主动可变弯度连续后缘襟翼风洞模型的设计与构建，用于气动弹性“飞行中”形状优化测试
6. Mechanical Properties of High-Performance Steel-Fibre-Reinforced Concrete and Its Application in Underground Mine Engineering [O] . Xiang Li, Weipei Xue, Cao Fu, 2019

机译：高性能钢纤维混凝土的力学性能及其在地下矿山工程中的应用
7. Mechanical properties of various concrete after high temperature exposure Mechanical property of various types of concrete after high temperature exposure is investigated. Considering compressive strength requirement for a vertical element in high rise building, concrete specimens with various design strengths of 35, 80, 100, and 150 MPa were tested. Particularly, the influence of incorporated steel fiber on fire resistance is of interest in this study. Experimental results show that the fire resistance depends on the design strength and steel fiber content. Normal strength concrete (NSC) of a design strength of 35 MPa or high performance concrete (HPC) of 80-100 MPa does not spall when exposed to 100-400 °C of temperature. However, an explosive spalling occurs at 300 °C when the HPCs contain 1 vol. of steel fiber. Ultra-high performance concrete (UHPC) of a design strength of 150 MPa and 1.5 vol. of steel fiber also shows dramatic spalling at 300 °C. The experimental results found in this study can contribute to a better understanding of the behaviors of HPC and UHPC under fire and the role of steel fiber on the fire resistance. [O] . 2017

机译：研究了高温暴露后各种混凝土高温曝光机械性能各种混凝土的机械性能。考虑到高层建筑中垂直元件的抗压强度要求，测试了35,80,100和150MPa各种设计强度的混凝土试样。特别是，在这项研究中，掺入钢纤维对耐火性的影响。实验结果表明，耐火性取决于设计强度和钢纤维含量。在暴露于100-400°C的温度时，80-100MPa的设计强度为35MPa或高性能混凝土（HPC）的正常强度混凝土（NSC）不会击落。然而，当HPC含有1体积的钢纤维的百分比时，爆炸性剥落发生在300℃。超高性能混凝土（UHPC）的设计强度为150 MPa和1.5 Vol。钢纤维的百分比也显示出300℃的剧烈剥落。本研究中发现的实验结果可以有助于更好地了解在火灾中的HPC和UHPC的行为以及钢纤维对耐火性的作用。
8. The Mechanical Properties of Carbon Fibre with Glass Fibre Reinforced Plastics [R] . Summerscales, J. 1983

机译：玻璃纤维增强塑料对碳纤维的力学性能

Mechanical tests and engineering applicability of fibre plastic concrete used in tunnel design in active fault zones

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