基于电磁波法的砂土地基堤坝含水率诊测研究

Research on Moisture Content Diagnosis of Sand Foundation Dams Based on Electromagnetic Wave Method

某堤坝采用砂土作为填料,运行期间受到超警水位等不利环境的影响,加上地下水位持续居高,砂土地基存在饱和可能性,给堤坝安全带来了风险。文章以该堤坝为案例进行研究,为了掌握堤坝堤身或边坡内部的隐患物性状态,提出利用探地雷达电磁波技术,开展砂土地基堤坝的含水率诊测与分析。通过诊断表明,利用电磁波对含水高敏感度的特点,成功地探测到砂土地基堤坝含水率分布情况。文章提出的探测技术为该类型堤坝寿命周期内安全评估和后期维护加固提供了有力参考依据。

A dam uses sand as filler. During operation, it is affected by unfavorable environment such as over-warning water level, coupled with the continuous high groundwater level, and the possibility of saturation of sand foundation,which brings risks to dam safety. This paper takes the dam as a case study. In order to grasp the physical properties of the hidden dangers of the dam body or inside the slope, it is proposed to use the ground penetrating radar electromagnetic wave technology to carry out the moisture content diagnosis and analysis of the sand foundation dam. The diagnosis shows that the distribution of moisture content in sand foundation dam is successfully detected by using the high sensitivity of electromagnetic wave to water content. The detection technology proposed in this paper provides a strong reference for the safety evaluation and later maintenance and reinforcement of this type of dam during the life cycle.