基于回弹弯沉值的风积沙路基性能研究  

Study on the Performance of Aeolian Sand Subgrade Based on Resilience Deflection

作　　者：杨玉泉 赵立东[2] YANG Yuquan;ZHAO Lidong(Shanghai Municipal Engineering Design Institute (Group)CO.,LTD ,Shanghai 200092,China;Research Institute of Highway Ministry of Transport,Beijing 100088,China)

机构地区：[1]上海市政工程设计研究总院(集团)有限公司,上海200092 [2]交通运输部公路科学研究院,北京100088

出　　处：《公路工程》2019年第5期247-251,共5页Highway Engineering

摘　　要：为掌握风积沙大规模应用于高速公路对路基整体刚度的影响,依托新疆S215三莎高速公路项目,介绍了地区风积沙特征,以回弹弯沉值为主要研究对象,选择了有代表性的22组数据,归纳分析后发现在一定范围内(2~8m)风积沙填筑高度对路基整体刚度影响较小。其次,通过对同一路段的回弹弯沉值的跟踪测试,总结了风积沙路基成型后整体刚度随时间推移提升的规律,增长幅度最大可达30%。另外,通过路面结构层逐层施工后的弯沉值,阐述了半刚性基层对弯沉值的影响程度,并分析比较了风积沙填筑路基与砾石土填筑路基的差异。最后,展望了风积沙在高速公路路基填筑中应用尚需重点研究的几个方向。In order to master the global stiffness of highway subgrade applied to the mass of aeolian sand.It relies on Xinjiang s215 SanSha highway project,introducing the characteristics of aeolian sand in the area ,taking resilience deflection as the main research object.A representative 22 sets of data are selected. The data show that the filling height has little influence on the global stiffness of the subgrade in a certain range(2~8 m). Secondly,through continually testing the resilience deflection of the same section,summarize the rules of aeolian sand subgrade global stiffness which change with time,biggest growth is 30%. In addition,the influence of semi-rigid base on resilience deflection is explained by the data which changed with the construction layer step by step. And the paper compares and analyzes the difference between the subgrade filled by aeolian sand and the subgrade filled by gravel soil. Finally,it forecasts the main study direction to the application of aeolian sand in highway subgrade.

关 键 词：道路工程 回弹弯沉值 风积沙 整体刚度 

分 类 号：U416[交通运输工程—道路与铁道工程]