植被作用下膨胀土蒸发模拟试验装置及TDR标定

以广西膨胀土为研究对象,考虑大气的影响作用,针对植被作用下膨胀土的工程性质,展开室内模型试验。为了有效模拟大气环境,研制了阳光辐射模拟系统,并对不同辐射强度进行了标定;为了有效测试蒸发状态下膨胀土水分的迁移特征,对蒸发状态下TDR的测试过程进行了标定试验。研究结果表明,植被作用下膨胀土蒸发模拟试验装置及TDR标定方法可以满足试验要求,也为类似项目提供了借鉴。

Simulated device for expansive soil evaporation considering the vegetation action and TDR calibration test

Expansive soil in Guangxi is the research object. Considering the influence of atmosphere, the laboratory model experiments were carried out on the engineering properties. In order to effectively simulate the atmospheric environment, sunshine radiation simulation system is developed, and has carried on the calibration of different radiation intensity; In order to effectively test the migration characteristics of expansive soil moisture evaporation conditions, and under the evaporation condition of TDR test procedures for the calibration. The results show that under the action of vegetation simulation test device for expansive soil evaporation and TDR method can meet the test requirements. The results build a solid foundation for the further research work, and also provide a reference for similar projects.