黄土路堤土工格室护坡冲刷模型试验研究

Research of Erosion Contrast Model Tests for Slope Protectingby Geocell of Loess Embankment

采用模型试验方法,以边坡坡率、汇水流量、土工格室规格为主要影响因素,进行了一系列的黄土路堤边坡冲刷对比试验。试验结果表明:对于黄土路堤边坡而言,有土工格室防护的坡面不会形成连续的冲沟,冲刷深度小于10cm,无土工格室防护的坡面,可形成连续的V型冲沟,冲刷深度可达20～30cm;采用土工格室防护时,可以减小40%的冲刷量,说明土工格室对黄土路堤边坡的冲刷防护效果明显,是一种有效的边坡防护方法;试验中得到的一些数据和结果,可为以后的边坡防护设计所借鉴。

Using model test,considering the grade of slope,catchment flow,size of geocell,the paper does a series of erosion comparison tests for laboratory model of loess embankment slopes.The results show that for the loess embankment slope,on the surface of slope protected by geocell no consecutive gully would be formed and the erosion depth is less than 10cm;and that without protection consecutive'V'gully would be formed with the erosion depth up to 20～30cm.The erosion is decreased by 40 percent for slope protected by geocell.The geocell has obvious effects for erosion protection of loess embankment slopes and it is an effective method for slope protection.These data and tests result will offer reference for later design of slope protection.