基于物理试验生物滞留沟对海绵城市路基水分场分布研究

以重庆市海绵城市道路试验路段作为研究背景,研究探讨降雨条件下生物滞留沟路基水分分布影响。通过室内物理模型试验,采用土壤水分传感器和高密度电法进行数据采集。通过分析降雨前后路基体积含水率的变化情况,和降雨前后路基的电阻率的分布情况,试验结果表明:防渗膜全包的生物滞留沟能够有效地控制雨水进入车行道侧路基,防渗膜半包结构的生物滞留沟对雨水的就地下渗具有较好的效果,车行道下侧下渗雨水主要集中在2倍生物滞留沟深度。

Research on the water field distribution of sponge city roadbed based on the bioretention ditch of physical experiment

Based on the research background of Chongqing sponge city road test section, this paper studies the influence of the water distribution on the subgrade of the biological retention ditch under the rainfall condition. Through the indoor physical model test, the soil moisture sensor and high density electrical method are used to collect data. By analyzing the changes of rainfall volume moisture content before and after the embankment, and the distribution of resistivity of subgrade before and after the rain, the results showed that the total package of biological stranded ditch anti-seepage membrane can effectively control the rain into the roadway side of roadbed, half package structure of biological stranded ditch anti-seepage membrane of rain infiltration on the spot has good effect. The lateral water infiltration of rainwater under roadway is mainly concentrated in two times of bioretention groove depth.