| 黄泛平原区土的工程特性研究 |
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| 引用本文： | 周 冰,姚占勇,商庆森,姚 群.黄泛平原区土的工程特性研究[J].岩土力学,2006,27(Z1):591-596. |
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| 作者姓名： | 周 冰 姚占勇 商庆森 姚 群 |
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| 作者单位： | 1.山东大学，济南 250061；2.山东高速公路集团，济南 250061 |
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| 基金项目： | 周冰，男，1970年生，硕士研究生，高级工程师，主要从事路基工程研究。E-mail: zb691121@163.com |
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| 摘 要： | 采用X衍射、电子探针等方法分析了黄泛区土的组成特点、颗粒微观结构和物理力学特性，研究了土的压实机理和性状。研究认为，黄泛区土呈层状结构，化学成分以硅、铝为主，非黏土矿物含量高，粉土颗粒高达80 %以上，级配较差。由于黄河水的长距离搬运作用，粉土颗粒磨圆度高、表面剥落严重，碾压时颗粒间难以形成有效的嵌挤，表现出较差的压实性状，在90 %的压实度下，土中孔隙气体体积较大，具有较大的压缩性；压实度由95 %提到98 %，土的密实度和承载能力提高显著；毛细水作用强烈，地下水位以上1.3 m范围内，土质处于过湿状态和严重超载的状况下，低填方路基的支撑能力不足。
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| 关 键 词： | 黄河 粉粒 微观结构 路基 压实 |
| 收稿时间： | 2006-07-06 |
Research on engineering characteristic of soil
in alluvial plain by Yellow River |
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| ZHOU Bing,YAO Zhan-yong,SHANG Qing-sen,YAO Qun.Research on engineering characteristic of soil
in alluvial plain by Yellow River[J].Rock and Soil Mechanics,2006,27(Z1):591-596. |
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| Authors: | ZHOU Bing YAO Zhan-yong SHANG Qing-sen YAO Qun |
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| Institution: | 1. Shandong University, Jinan 250061, China; 2. Shandong Expressway Corporation, Jinan 250061, China |
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| Abstract: | Using test, the engineering characteristics of soil in flooded area by the Yellow River are studied. The constitution characteristics, grain microstructure and physico-mechanical characteristics of the soil are analyzed with x-ray and electronic probe etc. Its compaction mechanics and property is studied too. The soil presents in layer structure, and is mainly made up of silicon and aluminum in chemical constitution. The content of silt is more than 80 %, and its gradation is worse. The grain has high psephicity and severe surface flaking because of the long transport function of water. Consequently it’s difficult to form availably contact between grains, and expressing bad compaction characteristics. When the compaction reaches 90%, the soil has bigger compressibility, because the pore air volume is rather larger. While the compaction rising from 95 % to 98 %, the density and bearing capacity increase obviously. The holding power of low-filling roadbed is inadequate on the condition of overloading seriously, owing to the severe capillarity and high humidity inside the 1.3 m scope above the underground water level. |
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| Keywords: | Yellow River silt subgrade compaction |
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