开挖卸荷与孔隙水压耦合作用下千枚岩蠕变力学特性研究
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蔡鸿宇, 王运敏, 李小双, 耿加波
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Study on the Creep Mechanical Properties of Phyllite Under the Coupling Effect of Excavation Unloading and Pore Water Pressure
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Hongyu CAI, Yunmin WANG, Xiaoshuang LI, Jiabo GENG
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表4 分级加载蠕变试验方案
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Table 4 Graded loading creep test scheme
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试验试件 编号 | 应力集中 系数K | 开挖类型 | 孔隙水压P/MPa | 初始轴压σ1/MPa | 初始围压σ3/MPa | 偏应力σ1-σ3/MPa |
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等级1 | 等级2 | 等级3 | 等级4 | 等级5 |
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K1-P0 | 1 | 未受开挖扰动 | 0 | 4.8 | 4.0 | 0.3σP | 0.45σP | 0.6σP | 0.75σP | 0.9σP | K1-P0.5 | 1 | 未受开挖扰动 | 0.5 | 4.8 | 4.0 | 0.3σP | 0.45σP | 0.6σP | 0.75σP | 0.9σP | K1-P1 | 1 | 未受开挖扰动 | 1.0 | 4.8 | 4.0 | 0.3σP | 0.45σP | 0.6σP | 0.75σP | 0.9σP | K1-P1.5 | 1 | 未受开挖扰动 | 1.5 | 4.8 | 4.0 | 0.3σP | 0.45σP | 0.6σP | 0.75σP | 0.9σP | K2.6-P0 | 2 | 受开挖扰动 | 0 | 9.6 | 1.6 | 0.3σP | 0.45σP | 0.6σP | 0.75σP | 0.9σP | K2-P0.5 | 2 | 受开挖扰动 | 0.5 | 9.6 | 1.6 | 0.3σP | 0.45σP | 0.6σP | 0.75σP | 0.9σP | K2-P1 | 2 | 受开挖扰动 | 1.0 | 9.6 | 1.6 | 0.3σP | 0.45σP | 0.6σP | 0.75σP | 0.9σP | K2-P1.5 | 2 | 受开挖扰动 | 1.5 | 9.6 | 1.6 | 0.3σP | 0.45σP | 0.6σP | 0.75σP | 0.9σP |
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