The results show that the strain velocity mainly affects maximum principal stress.

研究结果表明,应变速率等因素对最大主应力的变化有一定影响.

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The calculation principle of earth pressure using principal stress arching is proposed.

给出了用主应力拱应力分析计算土压力的基本原理.

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The principal stress method is developed and the mechanical slab method is proposed.

发展了主应力法,提出了力学分块法.

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The direction of compressive principal stress is in NEE and the tensil stress is in NNW.

结果表明,应力场主压应力方向为NEE—SWW方向,主张应力为NNW—SSE方向.

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The superiority jointing groups are determined and the direction of structural principal stress is got.

分析出优势节理组,得出构造主应力的方向.

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