土工格室防护边坡抗冲刷规律试验研究

Experimental Study of Anti-erosion Pattern on Sideslope with Geocell Protection

采用变坡试验水槽对土工格室防护坡面的侵蚀规律进行了试验研究。试验坡度为5°～35°，放水流量1～2m2/h。基于传统的径流量和产沙量测定方法，分析了土工格室边坡坡面的产流产沙演化规律。研究结果表明：土工格室的存在形成一系列沿格室边缘菱形分布的纹沟，与自然坡面的冲刷形态有本质区别；累计侵蚀量随坡度、流量的增大而增大；土工格室坡面的侵蚀主要发生在前10mn，相同时段内的侵蚀量逐渐减小；同一流量条件下，土工格室坡面冲刷的侵蚀模数与边坡坡度之间呈良好的幂函数正相关关系。

Erosion pattern on geocell slope surface was studied using an experimental flume with varying slope. The range of slope degree was 50-350 and the range of flow discharge, 1-2 m3/h. The processes of runoff and sediment yields on the geocell slop surface were analyzed based on traditional measuring method. Results showed that due to the existence of geocell, a series of diamondshaped rills formed along the edges of the geocells, which is substantially different from the scouring pattern on a natural slope. The accumula tive erosion amount increased with the increased slope degree and discharge. Erosion on the geocell slope sur face occurred in the early 10 rain and the erosion amount decreased gradually in the same period. There was a positive correlation between the scouring erosion modulus on the geocell slope surface and slope degree at the same discharge.