• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>Cold regions engineering 2009 : Cold regions impact on research, design, and construction >Using Soil Stress State Transducers in Freezing Ground
【24h】

Using Soil Stress State Transducers in Freezing Ground

机译：在冻土中使用土壤应力状态传感器

获取原文
获取原文并翻译 | 示例
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Three instrumented test sections of sand, silt and clay, were constructed to monitor the impact of frost layers on vehicle induced stresses and to assess the performance of the sensors used to measure such stresses. One of the instruments used to measure in-situ stress is the soil Stress State Transducer (SST), which was installed at 12.7cm depth within each of the test soils. The SST was designed by the USDA Agricultural Research Service, National Soil Dynamics Laboratory and the Auburn University Department of Agricultural Engineering, and has been used in many studies on vehicle induced stresses in agricultural soils, but not previously in freezing soil. Each SST consists of six semiconductor pressure transducers installed in a small sphere. Soil displacements, temperature and moisture and strength profiles were also monitored. Trafficking of the test sections was performed at frost depths ranging from zero to over 50 cm.rnThe SSTs functioned very well in frozen ground. The signals clearly showed the passage and sometimes the bow wave in front of each tire, and then the large vertical pressure spike as each tire passes over the sensor. The stress magnitudes diminish as the ground freezes above the sensors and then decrease further as the frost envelops the entire sensor.
机译：构建了三个仪器化的沙子，粉砂和粘土测试部分，以监测霜冻层对车辆诱发的应力的影响，并评估用于测量此类应力的传感器的性能。用于测量原位应力的仪器之一是土壤应力状态传感器（SST），该传感器安装在每种测试土壤中12.7cm的深度处。 SST是由美国农业部农业研究服务局，国家土壤动力学实验室和奥本大学农业工程系设计的，已被用于农业土壤中车辆诱发的应力的许多研究中，但以前并未用于冻结土壤中。每个SST都由六个安装在小球体中的半导体压力传感器组成。还监测了土壤的位移，温度和湿度以及强度分布。在零至50厘米以上的霜冻深度下进行测试部分的运输。SST在结冰的地面上表现良好。这些信号清楚地显示了每个轮胎前面的通过波形，有时还显示了弓形波，然后在每个轮胎经过传感器上方时出现了较大的垂直压力尖峰。当地面冻结在传感器上方时，应力大小减小，然后随着霜包裹整个传感器而进一步减小。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号