claypan

The original emphasizesd on construction in mine shaft deep thick swelling claypan in Tang-kou, the damage of outward layer a well of wall and some efficient measures.

介绍了唐口副井井筒冻结段深厚膨胀黏土层施工、外层井壁变形破坏情况及采取的有效措施，取得了一些有用的经验。

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The element geochemistry behavior of Guanghan claypan indicated that it has the dry change tendency in the environment.

广汉亚粘土层的元素地球化学行为表明它是在变干趋势的环境中形成的。

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Through the complete analyzing of representative pedons, there are5 diagnostic horizons, such as Ochric epipedons, Argic horizon, Claypan, Hydragric epipedon, Hydragric horizon;

通过对各土系的典型单个土体的全面的理化分析，确定样区土壤发育有淡薄表层、黏化层、黏磐层、水耕表层和水耕氧化还原层5个诊断层；

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Construction in Mine Shaft Deep Thick Swelling Claypan EXPANDED GRAPHITE

立井深厚膨胀黏土层施工

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Through the study about lanthanon and trace element, we can obtain the Guanghan claypan formation that has the homologous ingredient characteristic.

通过对微量元素和稀土元素的研究，可以得出广汉粘土层的形成具有同源成分特征。

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