工程爆破

2008, (03) 8-12

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预应力锚索抗爆洞室加固效果试验研究
EXPERIMENTAL RESEARCH ON REINFORCING EFFECTS OF ANTIKNOCK CHAMBER SUPPORTED BY PRESTRESSED ANCHORAGE

夏元友;张亮亮;顾金才;
XIA Yuan-you1,ZHANG Liang-liang1,GU Jin-cai2 (1. School of Civil Engineering and Architecture,Wuhan University of Technology,Wuhan 430070,China; 2. The Third Research Institute of the Corps of Engineering,General Staff of CPLA,Luoyang 471023,Henan,China)

摘要(Abstract):

研究爆炸波作用下预应力锚索抗爆洞室加固效果,对认识预应力锚索加固机理和完善洞室加固设计计算方法有着重要的意义。本文通过模型试验和数值分析,研究了在集中装药爆炸波的作用下,直墙圆拱式洞室围岩介质内爆炸波形宏观变化特征和峰值应力衰减规律,以及自由式锚索抗爆洞室周边围岩的受力变形状态和动力反应特征,结果表明抗爆洞室围岩抵抗变形能力得到一定提高。采用有限差分法分析得出的计算结果与试验数据吻合性较好,进一步证实了模型参数和建模的正确性。
The study of reinforcing effect of anti-detonation chamber reinforced by prestressed anchorage cable subjected to explosive waves is of important significance in understanding the reinforcing mechanism and building a perfect design computation method of chamber reinforcement. Based on model test and numerical simulation,the paper studied the macroscopical change features of explosive waveform and attenuation law of stress peak value within the rock medium of upright wall and circular arch under exposure to explosive wave of concentrated charge. It also investigated the deformation status of surrounding rock of anti-detonation chamber with free anchorage cable when subjected to force and its dynamic response characteristic. The results showed that the deformation-resisting capability of surrounding rock of anti-detonation chamber was improved. The outcomes computed out with finite difference theory were consistent with the data resulted from experiment,which could prove the effectiveness and correctness of the model building and the derived parameters.

关键词(KeyWords): 抗爆洞室;自由式锚索;加固效果;模型试验;数值模拟
Anti-detonation chamber; Free anchorage cable; Reinforcing effect; Model test; Numerical simulation

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作者(Author): 夏元友;张亮亮;顾金才;
XIA Yuan-you1,ZHANG Liang-liang1,GU Jin-cai2 (1. School of Civil Engineering and Architecture,Wuhan University of Technology,Wuhan 430070,China; 2. The Third Research Institute of the Corps of Engineering,General Staff of CPLA,Luoyang 471023,Henan,China)

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