交通节能与环保2025，Vol.21Issue(3)：264-268,5.DOI:10.3969/j.issn.1673-6478.2025.03.056
隧道早高强喷射混凝土压弯细观力学特性模拟研究
Numerical Simulation Study on the Micromechanical Properties of Early High-strength Shotcrete under Compression Bending Load
叶少敏 1李彬 1徐海岩 2邱志鹏 2丁远灏2
作者信息
- 1. 中国铁路设计集团有限公司,天津 300308
- 2. 四川农业大学土木工程学院,四川 成都 611830
- 折叠
摘要
Abstract
This paper simulates and analyzes the actual compressive and bending stress state of shotcrete in tunnel engineering through compressive tests on shotcrete cubes and discrete element numerical simulations of compression and bending.It explores the superiority of early high-strength shotcrete under different eccentricities.The results show that:(1)the addition of nanocrystalline gel polymer can significantly improve the mechanical properties,thereby improving the brittle failure mode of plain concrete to an elastic-plastic failure mode and enhancing the crack resistance of concrete.(2)Compared to plain concrete,early high-strength shotcrete exhibits more uniform displacement deformation during tensile failure,forming a symmetrical annular low displacement zone and reducing the possibility of local stress concentration failure in the structure.(3)Early high-strength shotcrete not only improves the deformation resistance of concrete,but also significantly enhances its ductility,resulting in smaller displacement deformation at the ultimate bearing capacity state,effectively avoiding brittle failure.关键词
早高强/喷射混凝土/压弯特性/细观力学特性/离散元数值模拟Key words
early high-strength/shotcrete/bending characteristics/microscopic mechanical properties/discrete element numerical simulation分类
交通运输引用本文复制引用
叶少敏,李彬,徐海岩,邱志鹏,丁远灏..隧道早高强喷射混凝土压弯细观力学特性模拟研究[J].交通节能与环保,2025,21(3):264-268,5.
