厚层基材喷播植草黄土路堑高边坡防护技术研究

Study on the Thick-lift Base Material and Seed Spraying Engineering Protection for Loess Cutting Slopes of Highway

针对黄土路堑高边坡坡体结构与坡面变形特点,提出了采用厚层基材喷播植草法对公路黄土路堑高边坡进行防护。并简要分析了厚层基材喷播植草护坡作用机理。通过现场人工模拟降雨,分析了厚层基材喷播植草护坡效果以及降雨对裸露黄土路堑边坡的侵蚀机制。试验表明,厚层基材喷播植草防护效果良好;在暴雨条件下,古土壤的破坏方式不同于黄土,且更易于侵蚀。

In view of the slope body structure and slope face characteristics ot the loess cutting slopes of highway, the thick-lift base material and seed spraying engineering protection for the slopes are presented, and the protection mechanism is analyzed. Through the in-situ washing-out testing from man-made rainfall, the slope protection effect and the corroded mechanism of the exposed loess cutting slopes are analyzed. The test results indicate that the protection is effective. Under the rainstorm condition, the destructive mode of the fossil soil is different from that of the common loess, and the fossil soil is easier to suffer the erosion.