| 开挖条件下节理围岩锚固效应的模型试验研 |
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| 引用本文： | 朱维申,任伟中,张玉军,张勇慧,永井哲夫,孙建生.开挖条件下节理围岩锚固效应的模型试验研[J].岩土力学,1997(1). |
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| 作者姓名： | 朱维申 任伟中 张玉军 张勇慧 永井哲夫 孙建生 |
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| 作者单位： | 中国科学院武汉岩土力学研究所!430071(朱维申，任伟中，张玉军，张勇慧)，日本株式会社青木建设研究所(永井哲夫，孙建生) |
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| 摘 要： | 介绍了节理岩体中开挖洞室并加以锚固的模型试验。模型尺寸为180cmX140cmX15cm。共研究对比了14个不同工况。其变换因素为：两相互为正交的节理组具有不同倾角；不同节理间距；不同初始地应力和施加锚杆或不施加锚杆。结果表明，围岩变形主要受节理变形控制而垮落区则完全由开挖自由面与不连续面的不利组合所制约。岩锚可以显著地减少围岩变形和破坏。最后，用离散元方法对一个试验工况做了数值计算对比分析。
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| 关 键 词： | 开挖 节理围岩 锚固效应 模型试验 离散元分析 |
Model Testing Research on Stability and Anchoring Effect of Opening Excavation in Jointed Rocks |
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| Zhu Weishen Ren Weizhong Zhang Yujun Zhang Yonghui.Model Testing Research on Stability and Anchoring Effect of Opening Excavation in Jointed Rocks[J].Rock and Soil Mechanics,1997(1). |
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| Authors: | Zhu Weishen Ren Weizhong Zhang Yujun Zhang Yonghui |
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| Abstract: | This paper deals with large-sized simu1ation tests concerning opening-excavation in a jointed rockmass and bolt-reinforcement of the opening. The testing model has sizes of 18Ocm X 140cm X 15cm and is tested under 14 different working conditions. The varying factors of these conditions are: dip of two orthogo-nal joint sets, joint spacing, initial stress field, installing or not installing bolt-anchoring. The results indi-cate that the deformation of rockmass is mostly governed by the deformati0n of joints and the collapsing areasof surrounding rocks are complete1y dependent on disadvantage combination of free excavating surfaces and discontinuities surfaces. Rock bolts can lower the level of deformation and failure of surrounding rocks great-ly. A result of numerical analysis using DEM for a working condition is given. |
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| Keywords: | :excavation jointed rockmass bolting effects model test DEM analysis |
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