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Two-scale basalt fibers reinforced concrete shield tunneling segments for underground constructions
Tunnelling and Underground Space Technology ( IF 6.7 ) Pub Date : 2025-01-17 , DOI: 10.1016/j.tust.2025.106383
Min Hou, Jiang Feng, Hougai Shi, Ruiyi Jiang, Hengyi Zhu, Hualin Fan
Tunnelling and Underground Space Technology ( IF 6.7 ) Pub Date : 2025-01-17 , DOI: 10.1016/j.tust.2025.106383
Min Hou, Jiang Feng, Hougai Shi, Ruiyi Jiang, Hengyi Zhu, Hualin Fan
In this paper, two-scale Basalt fibers reinforced polymer (BFRP) rebars reinforced arch (BRRA) technique was developed through applying BFRP rebars to macroscopically reinforce concrete shield tunneling segments (STSs). BFRP minibars were mixed into concrete as the micro reinforcements. Six two-scale BRRAs were prepared with content of minibars changing from 0%, 0.5% to 1.5%. Full-scale flexural experiments were performed to reveal the mechanical performances of the BRRAs. With higher minibar content, the utilization ratio of the BFRP rebars is much greater and the BRRA has longer elastoplastic deformation, higher bearing capacity and better ductility. Long elastic deformation of BFRP rebars and reinforcing mechanism of BFRP minibars improve the bearing capacity and ductility of the BRRA.
中文翻译:
用于地下施工的双尺度玄武岩纤维钢筋混凝土盾构隧道管片
本文通过将 BFRP 钢筋应用于宏观加固混凝土盾构隧道段 (STS),开发了双尺度玄武岩纤维增强聚合物 (BFRP) 钢筋增强拱 (BRRA) 技术。BFRP 迷你吧作为微加固材料混合到混凝土中。制备了 6 个双尺度 BRRA,迷你吧的含量从 0%、0.5% 到 1.5% 不等。进行了全尺寸弯曲实验以揭示 BRRA 的机械性能。迷你吧含量越高,BFRP 钢筋的利用率就越高,BRRA 的弹塑性变形时间更长,承载能力更高,延展性更好。BFRP 筋的长弹性变形和 BFRP 迷你吧的加固机构提高了 BRRA 的承载能力和延展性。
更新日期:2025-01-17
中文翻译:
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用于地下施工的双尺度玄武岩纤维钢筋混凝土盾构隧道管片
本文通过将 BFRP 钢筋应用于宏观加固混凝土盾构隧道段 (STS),开发了双尺度玄武岩纤维增强聚合物 (BFRP) 钢筋增强拱 (BRRA) 技术。BFRP 迷你吧作为微加固材料混合到混凝土中。制备了 6 个双尺度 BRRA,迷你吧的含量从 0%、0.5% 到 1.5% 不等。进行了全尺寸弯曲实验以揭示 BRRA 的机械性能。迷你吧含量越高,BFRP 钢筋的利用率就越高,BRRA 的弹塑性变形时间更长,承载能力更高,延展性更好。BFRP 筋的长弹性变形和 BFRP 迷你吧的加固机构提高了 BRRA 的承载能力和延展性。