| 罗安达砂物理力学性质初探 |
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| 引用本文： | 刘争宏,廖燕宏,张玉守.罗安达砂物理力学性质初探[J].岩土力学,2010,31(Z1):121-126. |
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| 作者姓名： | 刘争宏 廖燕宏 张玉守 |
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| 作者单位： | 机械工业勘察设计研究院，西安 710043 |
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| 摘 要： | 在罗安达及其周边，浅部广泛分布有红色和黄色两种色调的粉砂层。结合实际工程，采用现场调查、室内试验、现场标贯试验和载荷试验等手段对该种砂土进行了分析，结果表明，罗安达砂层在自然状态下可直立，具湿陷性和浸水后力学性质明显变差等独特物理力学特性；湿陷性随孔隙比增大，含水率减小，试验压力增大，黏粒和粉粒含量增大而增强，重塑砂土也具有湿陷性；力学性质随含水率的变化可逆，当含水量增加后再减小，其力学性质可明显恢复。
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| 关 键 词： | 罗安达砂土 红砂 湿陷性 |
| 收稿时间： | 2010-04-21 |
Preliminary study of physico-mechanical properties of Luanda sand |
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| LIU Zheng-hong,LIAO Yan-hong,ZHANG Yu-shou.Preliminary study of physico-mechanical properties of Luanda sand[J].Rock and Soil Mechanics,2010,31(Z1):121-126. |
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| Authors: | LIU Zheng-hong LIAO Yan-hong ZHANG Yu-shou |
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| Institution: | Institute of Geotechnical Investigation and Design, MMI, Xi’an 710043, China |
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| Abstract: | In Luanda and its surrounding area, silty sand in red or yellow color is widely distributed. Combining with two projects, based on the results of field investigation, indoor tests, standard penetration tests, plate loading tests, this kind of sand is analyzed. Some conclusions are drawn as follows. Luanda sand has bluff slope in natural situation, and has the special characteristic of collapsibility; and its mechanical properties will be obviously weakened by wetting. As the increase of void ratio, test pressure, content of clay and silt particle or the decrease of water content, the coefficient of collapsibility will be increased; besides, remoulded sand is also collapsible. As for mechanical indexes, will be recovered when water content is decreased after increased; i.e. mechanical indexes are reversible change with water content. |
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| Keywords: | Luanda sand red sand collapsibility |
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