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冲击压实技术处理高速公路湿陷性地基的 应用研究.pdf

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第24 卷 第7 期 岩石力学与工程学报 Vol.24 No.7 2005 年4 月 Chinese Journal of Rock Mechanics and Engineering April ,2005 冲击压实技术处理高速公路湿陷性地基的 应用研究 娄国充1,2 (1. 北京交通大学 土建学院,北京 100044 ;2. 石家庄铁道学院 土木工程分院,河北 石家庄 050043) 摘要:基于冲击压实技术在某高速公路工程中处理湿陷性地基的应用实践,对地基的湿陷性、干密度、孔隙比、 压缩模量、影响深度以及路基的沉降变形进行了系统研究。研究表明,冲击压实技术用于湿陷性地区的路基施工 不仅明显改善了地基的质量,同时对减小路基的工后沉降也有明显的效果。 关键词:道路工程;湿陷性;冲击压实技术;工后沉降 中图分类号:U 412.36+6;U 416 文献标识码:A 文章编号:1000 –6915(2005)04 –1207 –04 APPLICATION OF IMPACT COMPACTION TECHNOLOGY IN HIGHWAY EMBANKMENT OF COLLAPSIABLE LOESS SOILS 1,2 LOU Guo-chong (1. School of Civil Engineering ,Beijing Jiaotong University ,Beijing 100044,China; 2. School of Civil Engineering ,Shijiazhuang Railway Institute ,Shijiazhuang 050043 ,China) Abstract :Based on a case of a highway embankment on collapsible loess ground ,an impact compaction technology for collapsible loess ground is developed. During the process of compaction ,the elastic modulus , compaction degree ,collapsibility,settlement and other parameters of the soil are measured and the depth of impact compaction is comprehensively studied. The results of experiment indicate that the elastic modulus and compaction degree increase and the collapsibility and settlement decrease with impact compaction,and impact compaction is effective in improving the quality of embankment and reducing the settlement after construction. Key words :highway engineering ;collapsibility ;impact compaction technology ;settlement after construction 压实体积,并减少压实遍数,从而大大提高路基的 1 引 言 压实功效。与
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