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Elastic-Plastic-Brittle Unified Solution of Surrounding Rocks in Deep Openings

机译：深度开口围岩围岩的弹塑性脆性统一解决方案

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摘要

The surrounding rocks in deep openings are deformed too large and fractured frequently during excavation process. Taking the circular tunnel as the research object, surrounding rocks are divided into the cracked region, the plastic region and the elastic region. Based on the plane strain condition and twin shear strength theory, the analytical solutions for the stress and displacement are derived and the individual region radii are obtained. The strengthening effect of the intermediate principal stress on rock stress and the effect of elastic modulus deterioration on rock mass deformation are discussed with examples. Finally, some new conclusion has obtained, which provide meaningful theoretical foundations for reinforcement of tunnel project.
机译：在挖掘过程中，围绕深开口的围岩变形过大，频繁裂开。以圆形隧道作为研究对象，围岩被分成裂纹区域，塑料区域和弹性区域。基于平面应变状态和双剪切强度理论，得出应力和位移的分析解，获得各个区域半径。实施例讨论了中间主应力对岩石应力的强化效果及其弹性模量劣化对岩体变形的影响。最后，一些新的结论已经获得，为隧道项目加固提供了有意义的理论基础。

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