粘土质地层、页岩层遇水后分子联结力降低,产生体积膨胀或分散,加之钻井时,泥浆密度小,造成井壁上径向应力大于井内液柱压力,产生井眼小于钻头直径的现象。
...工工艺 缩径 导管堵塞 桩孔偏斜 断桩 [gap=622]Keywords: cast-in-situ bored pile , Construction Technology , hole shrinkage, Catheter jams, Pile bore skewed, Breaking pile ..
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... open die forging 自由锻造 open die forward extrusion 缩径 opening angle 导入角 ...
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Compression behavior with the two conditions of end fixing and end free is analyzed by analytic expression. Characteristic of stress-strain with end fixing and critical pressure in buckling with end fixing and end free are confirmed.
采用解析方法,分析了端部约束和自由两种条件下缩径变形行为,讨论了坯料端部约束条件下应力-应变的特点,得到端部约束和自由条件下临界失稳压力,提出了粘性介质外压缩径过程褶皱可消除的临界尺寸。
参考来源 - 变径薄壁件粘性介质外压缩径的试验研究·2,447,543篇论文数据,部分数据来源于NoteExpress
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