| 爆炸平面波下锚杆对洞室加固效果模型试验方法 |
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| 引用本文： | 杨自友,吴德义,徐景茂. 爆炸平面波下锚杆对洞室加固效果模型试验方法[J]. 兵工学报, 2020, 41(12): 2478-2485. DOI: 10.3969/j.issn.1000-1093.2020.12.013 |
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| 作者姓名： | 杨自友 吴德义 徐景茂 |
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| 作者单位： | （1.安徽建筑大学 土木工程学院， 安徽 合肥 230601；2.军事科学院国防工程研究院 工程防护研究所， 河南 洛阳 471023) |
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| 基金项目： | 国家自然科学基金项目(51674005)；安徽省高校自然科学重点项目(KJ2018A0501) |
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| 摘 要： | 为探索爆炸平面波下锚杆对洞室的加固效果，通过抗爆模型试验，从围岩应力、洞壁环向应变、加速度和顶底板相对位移4个方面，研究爆炸平面波作用下毛洞和2种锚杆对洞室的加固效果。分析爆炸平面波强度沿着垂直方向和水平方向的衰减规律；比较毛洞、全长粘结式锚杆加固洞室和自由式锚杆加固洞室的洞壁环向应变、加速度、顶底板相对位移之间的差异。结果表明：爆炸平面波强度沿垂直方向的衰减速度比水平方向的慢；每个洞室内拱顶处的加速度和抗变形能力最大，底板的加速度最小；拱脚是洞室中极易产生拉应变的地方，锚杆加固能使拱脚围岩由受拉变形改变为受压变形；全长粘结式锚杆加固的洞室拱顶和底板都产生了相对较大加速度，但在减小洞室拱部变形、顶底板相对位移和侧墙加速度方面的作用大于自由式锚杆。
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| 关 键 词： | 锚杆 爆炸平面波 洞室 模型试验 加固效果 |
Model Test Method of Reinforcement Effects of Rock Bolts to Caverns under Explosive Plane Wave Loading |
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| YANG Ziyou,WU Deyi,XU Jingmao. Model Test Method of Reinforcement Effects of Rock Bolts to Caverns under Explosive Plane Wave Loading[J]. Acta Armamentarii, 2020, 41(12): 2478-2485. DOI: 10.3969/j.issn.1000-1093.2020.12.013 |
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| Authors: | YANG Ziyou WU Deyi XU Jingmao |
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| Affiliation: | (1.School of Civil Engineering，Anhui Jianzhu University， Hefei 230601，Anhui，China；2. Institution of Engineering Protection, Institute of Defence Engineering, Academy of Military Science of PLA，Luoyang 471023，Henan，China) |
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| Abstract: | The cavern unreinforcement and reinforcement effects of two kinds of rock bolts to the caverns under the explosive plane wave loading are studied from four aspects, i.e., surrounding rock stress， circumferential strain and acceleration of cavern wall, and roof-to-floor relative displacement, through antiexplosion model test. The intensity attenuation laws of explosive plane waves along vertical and horizontal directions are analyzed. The differences of the circumferential strain and accelerations of cavern wall，and the roof-to-floor relative displacement are compared for the unreinforced cavern, and the caverns reinforced by the full-length bonded rock bolts and the non-full-length bonded rock bolts. The results indicate that the intensity attenuation speed of explosive plane wave in vertical direction is slower than that in horizontal direction. The acceleration and deformation resistance of the arch roof are the largest and the acceleration of the floor is the smallest in each cavern. Arch foot is a place where the tensile strain is very easy to occur in caverns. The reinforcement of rock bolts can change the tensile deformation of surrounding rock of arch foot to compression deformation. The arch roof and floor of cavern reinforced by the full-length bonded rock bolts produce relatively large accelerations. However， the full-length bonded rock bolts are better than the non-full-length bonded rock bolts in some aspects, such as reducing the deformation of arch， the roof-to-floor relative displacement and the acceleration of side wall. |
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| Keywords: | rockbolt explosiveplanewave cavern modeltest reinforcementeffect |
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