冲击压实技术在黄土路基施工中的应用研究
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摘要
本课题在对国内外有关冲击压实技术调研的基础上,依托西湟公路、马平公路、西塔公路及平阿公路试验段开展冲击压实试验研究,对各个试验段的试验结果进行分析、综合和总结,研究了冲击压实技术在青海黄土路基施工中的施工工艺、施工效果、检测方法及效益等问题。
     通过试验研究主要得出如下认识:
     ①冲击压实技术处理湿陷性黄土地基时,其有效处理深度一般不超过80cm,冲压遍数以30遍左右为宜;
     ②对路基分层冲压,在要求土体中各点压实度均达到规范要求时,路基冲压最佳组合为虚铺厚度80cm、冲压40遍;在只要求土体平均压实度达到规范要求时,路基冲压最佳组合为虚铺厚度80cm、冲压30遍;
     ③大面积施工时,质量控制方法可按照在以冲压遍数作为主要控制指标的同时,要求最后10遍分计沉降量小于累计沉降量10%;
     ④在施工单位自己购置冲击压实机情况下,与传统施工相比较,冲击压实技术是一种既能节约资金又能大量缩短工期的施工方法。
Based on the investigation and study of impact compaction technology in civil and abroad, this paper discusses the impact compaction working sections that include XiNing ~ HuangYuan, MaChangYuan~ PingAn , XiNing ~ TaErSi and PingAn ~ADai expressways. Through contrast analysis and generalization of the working sections' test data and aggregate analysis of expressways' test result, this paper studies construction process , construction effect test method and efficiency of loess subgrade construction applied by impact compaction technology in QingHai Province .
    Conclusions as following have got through test study:
    (1)When impact compaction technology is applied to treat collapsible loess subgrade, the effect depth may be treated generally can not override 80 cm and impact compaction pass is optimum at 30 times .
    (2)For stratified impact compaction of subgrade, when compactness of each level reaches codeslstandards loose laying depth of 80 cm fits 40 impact compaction pass is the optimum combination of subgrade construction. When average compactness in each level reaches codeslstandards loose laying depth of 80 cm fits 30 impact compaction pass is the optimum combination o
    (3)The quality control method may request impact compaction pass as the main control index and at the same time the final division settlement is less than 10% of total settlement as large area subgrade is constructed .
    (4)If construction organization itself have impact compactor, impact compaction technology compared with traditional construction methods can not only economize on fund but also obviously shorten construction period.
引文
1、沙庆林,公路压实与压实标准,人民交通出版社,1998;
    2、公路路基试验规程,人民交通出版社,1996;
    3、公路土工试验规程,人民交通出版社,1995;
    4、高大钊,地基加固新技术,机械工业出版社,1999;
    5、阎小波,高等级公路湿陷性黄土路基处理技术研究,长安大学硕士论文,2001;
    6、周志军,强夯处理黄土路堤的研究,长安大学硕士论文,2001;
    7、山西宣大高速公路冲击压实检测报告;
    8、八达岭高速公路冲击压实检测报告;
    9、杨世基,冲击压实技术在路基工程中的应用,公路,1999;
    10、杨世基等,冲击压实粗粒土路基,公路交通科技,1999;
    11、苏新国等,冲击压实技术在混凝土路面改建工程中的应用,公路,2002;
    12、史保华等,冲击压实技术在机场工程软基处理中的应用研究,中国公路学报,2001;
    13、何兆益等,冲击压实技术在万州机场高填方填筑中的应用研究,重庆交通学院学报,2001;
    14、苟桂枝等,冲击压实机压实效果的理论分析,公路,2001;
    15、齐诚等,冲击压实技术在中国的应用与前景,1999;
    16、张勇等,冲击压实机在盐兴路改造工程中的应用,公路交通科技,2001;
    17、冲击压实机在公路和机场施工中的应用,Michael Pinard, J H Strydom。

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