干旱区生态环境知识资源中心(Arid): 风积沙压实特性试验研究

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	风积沙压实特性试验研究
其他题名	Experimental research on compaction characteristics of aeolian sand
	袁玉卿; 王选仓
ISSN	1000-4548
出版年	2007
卷号	29 期号:3 页码:360-365
中文摘要	风积沙是一种特殊的筑路材料,其压实特性是影响沙漠公路施工质量的重要因素.为了研究风积沙的压实特性,进行了筛分试验、标准重型击实试验和振动试验及野外现场试验.筛分试验结果表明:风积沙级配不良,沙粒均匀,粒径主要分布在0.25～0.074 mm之间,属于细砂;击实曲线与常规工程材料显著不同,呈一个特殊的横写S型,干密度随含水率变化有两个峰值,揭示了风积沙在含水率为0和最佳含水率下,均可以达到最佳密实度的特有性质.振动试验表明:风积沙的最佳振动频率为45～50 Hz.现场试验进行机械优化配置,采用干压实工艺,试验压实度代表值达到了96%,效果良好.沙样的电镜扫描图显示,振动干压实后,风积沙微观结构良好,达到了预期的效果.
英文摘要	Unlike the other road materials, aeolian sand had some compaction characteristics that were key factors of influence on construction qualities of highway in the desert. In order to study the characteristics, a series of laboratory and field tests were performed, which included the experiments of sieve analysis, modified standard compaction, vibrating compaction and field test. By analyzing the sieve analysis test data, it was found that the gradation of aeolian sand was bad, with even fine grains with diameters mostly ranged from 0.25mm to 0.074mm. Then, based on the laboratory compaction test results, a compaction curve was plotted, which was quite different to the other kinds of road materials, and similar to a horizontally-written letter S. There were two peak values in the special curve with the increase of water content, which was the special character of aeolian sand could be well compacted whatever it was dry or wet. Also, according to the laboratory vibrating test results, the best vibrating frequency range was proposed, which was from 45 to 50 Hertz. Moreover, some field compaction tests were carried out. On the construction site of highway, the aeolian sand subgrade was compacted in the condition of natural water content, with optimized construction machines, obtain an acceptable degree of compaction, 96%, meeting the current specifications. At last, comparative studies were carried out with electron microscope pictures of aeolian sand, which indicated that the microstructure of compacted dry aeolian sand was much denser than that of natural one.
中文关键词	道路工程 ; 风积沙 ; 击实试验 ; 振动压实 ; 压实特性
英文关键词	road engineering aeolian sand compaction test vibrating compaction compaction characteristic
语种	中文
国家	中国
收录类别	CSCD
WOS类目	TRANSPORTATION
WOS研究方向	Transportation
CSCD记录号	CSCD:2712341
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/221653
作者单位	长安大学公路学院, 西安, 陕西 710064, 中国
推荐引用方式 GB/T 7714	袁玉卿,王选仓. 风积沙压实特性试验研究[J],2007,29(3):360-365.
APA	袁玉卿,&王选仓.(2007).风积沙压实特性试验研究.,29(3),360-365.
MLA	袁玉卿,et al."风积沙压实特性试验研究".29.3(2007):360-365.

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