中文核心期刊
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中国科技核心期刊
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重庆交通大学学报（自然科学版）

重庆交通大学学报（自然科学版） ›› 2025, Vol. 44 ›› Issue (5): 52-58.DOI: 10.3969/j.issn.1674-0696.2025.05.07

• 桥梁与隧道工程 • 上一篇    

基于冲击应力阻滞理念下砂土-玻璃钢格栅复合垫层棚洞数值仿真与试验研究

王星1,2，何雄飞1,2，黎盼3,4，梅华5，胡朝霞5   

  1. (1. 中交第二公路工程局有限公司，陕西 西安 710065；2.中交集团山区长大桥隧建设技术研发中心，陕西 西安 710199； 3.长安大学 公路学院，陕西 西安 710064；4.长安大学 西安长安大学工程设计研究院有限公司，陕西 西安 710064; 5.湖南工学院 土木与建筑工程学院，湖南 衡阳 421002)
  • 收稿日期:2024-05-28 修回日期:2024-07-03 发布日期:2025-05-23
  • 作者简介:王星(1989—)，男，陕西华县人，高级工程师，博士，主要从事边坡落石防护等方面的研究。E-mail:1548622258@qq.com 通信作者：黎盼(1987—)，男，陕西咸阳人，博士研究生，工程师，主要从事隧道与地下工程等方面的研究。E-mail：badminton@chd.edu.cn
  • 基金资助:
    湖南省教育厅科学研究项目(22C0616)；衡阳市指导性计划项目(202323016888)

Numerical Simulation and Experimental Research on the Composite Cushion Layer of Sand and Fiberglass Grating for Shed Tunnel Based on the Concept of Impact Stress Blocking

WANG Xing1,2, HE Xiongfei1,2, LI Pan3,4, MEI Hua5, HU Zhaoxia5   

  1. (1. CCCC Second Highway Engineering Co., Ltd.，Xian 710065, Shaanxi, China；2. Research and Development Center of Construction Technology of Long Bridge & Tunnel in Mountain Area, CCCC， Xian 710199， Shaanxi, China； 3. School of Highway, Changan University, Xian 710064, Shaanxi, China; 4. The Engineering Design Academy of Changan University Co., Ltd., Changan University, Xian 710064, Shaanxi, China；5. School of Civil and Architecture Engineering, Hunan Institute of Technology, Hengyang 421002，Hunan,China)
  • Received:2024-05-28 Revised:2024-07-03 Published:2025-05-23

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摘要： 针对危岩落石冲击棚洞防护结构问题，采用室内试验及数值仿真方法，探究落石冲击作用下砂土-玻璃钢格栅复合垫层棚洞受力及变形规律。研究结果表明：相较于纯砂土垫层棚洞，新型棚洞顶板冲击荷载分布更为均匀，后者顶板应力峰值为纯砂土垫层的69.9%，板腹位移是砂土垫层的76.6%。为进一步验证新型棚洞结构防护效果，构建与现场棚洞尺寸一致的计算模型，结果显示：新型棚洞顶板腹部单元冲击应力峰值为砂土垫层的44.4%，顶板腹部位移峰值为砂土垫层的65.3%，砂土-玻璃钢格栅复合垫层对落石冲击应力具备明显的阻滞作用，极大避免了顶板腹部中心的受力集中状态，降低了顶板腹部应力及位移峰值，大幅提升了棚洞顶板抗落石冲切安全系数。

关键词: 隧道工程；落石冲击；棚洞顶板；玻璃钢格栅；复合垫层；室内试验；数值仿真

Abstract: In response to the problem of the protective structure of shed tunnels impacted by dangerous rock and rockfall, indoor experiments and numerical simulation methods were used to explore the stress and deformation laws of shed tunnels composite cushion layer of sand and fiberglass grating under the impact of rockfall. The research results show that compared with the pure sand cushion layer shed tunnels, the impact load distribution on the roof of the new type of shed trunnel is more uniform. The peak stress of the roof of the latter is 69.9% of that of the pure sand cushion layer, and the displacement of the slab belly is 76.6% of that of the sand cushion layer. To further verify the protective effect of the new type shed tunnel structure, a calculation model consistent with the size of the shed tunnel on site was constructed. The results show that the peak impact stress of the abdominal unit of the new type shed tunnel roof is 44.4% of the sand cushion layer, and the peak displacement of the abdominal unit of the roof is 65.3% of the sand cushion layer. The composite cushion layer of sand and fiberglass grating has a significant blocking effect on the impact stress of falling rocks, greatly avoiding the stress concentration state at the center of the roof belly, reducing the peak stress and displacement of the roof belly, and greatly improving the safety factor of the shed tunnel roof against falling rocks and cutting.

Key words: tunnel engineering; rockfall impact; top plate of shed tunnel; fiberglass grating; composite cushion layer; indoor testing; numerical simulation

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