粉砂土路基施工质量GeoGauge检测有效性分析  

Effectiveness Analysis of GeoGauge Detection in Silt Soil Subgrade

作　　者：何进 刘树阁 杨广庆[2] HE Jin;LIU Shu-ge;YANG Guang-qing(Hebei Expressway Preparation and Construction Office for Beijing-Xiongan Expressway,Baoding 071799,China;Shijiazhuang Tiedao University,Shijiazhuang 050043,China)

机构地区：[1]河北省高速公路京雄筹建处,河北保定071799 [2]石家庄铁道大学,石家庄050043

出　　处：《工程建设与设计》2022年第21期62-64,共3页Construction & Design for Engineering

基　　金：河北省交通运输厅科技项目(JX-202009)。

摘　　要：为了深入研究GeoGauge使用的有效性,以常见的粉砂土公路路基结构为模拟对象,基于室内模型试验和三维有限元数值模拟,研究分析GeoGauge的检测影响深度以及含水率、压实度变化对测试结果的影响。结果表明:GeoGauge在粉砂土路基中的影响深度在25cm左右;GeoGauge检测刚度值随着含水率的增大,呈现出先增大后减小的变化趋势,且最大刚度值在最优含水率附近;GeoGauge检测刚度值随着压实度的增加而增大,且刚度和压实度之间存在良好的指数关系。To delve into the effectiveness of GeoGauge, the highway subgrade structure is used as the simulation object, based on the indoor model test and three-dimensional finite element numerical simulation, the action depth of GeoGauge detection, as well as the action of water content and compaction degree changes on the test results are studied and analyzed. The results show that the action depth of GeoGauge in silt soil subgrade is about 25 cm;the stiffness value detected by GeoGauge shows a trend of first increasing and then decreasing with the increase of water content, and the maximum stiffness value is at the optimal water content. Near;GeoGauge detects that the stiffness value increases with the action of compaction, and there is a good exponential relationship between stiffness and compaction.

关 键 词：数值模拟 Geo Gauge 影响深度 模型试验 

分 类 号：U416.1[交通运输工程—道路与铁道工程]