生态边坡施工初期防护方式试验研究

Experimental Study on Protection Method of Ecological Slope in the Initial Stage of Construction

针对土工格室护坡在施工初期植被未长成时容易受气候和环境的影响从而发生失稳破坏,甚至整体滑坡的问题,提出在土工格室浅层填入麦秸秆加筋土的生态护坡方式。通过室内边坡模型的人工降雨试验,对不同规格土工格室防护坡面及有无麦秸秆加筋防护坡面的抗冲蚀性能进行了对比分析。结果表明,采用土工格室及麦秸秆加筋防护可有效提高植被不完善边坡的抗冲蚀性能;仅土工格室加筋防护坡面的冲蚀量为裸坡冲蚀量的27.58%,土工格室及麦秸秆加筋防护坡面的冲蚀量仅为裸坡冲蚀量的15.72%;同等条件下,土工格室尺寸规格越小,坡面抗冲蚀性能越好。试验结果可为该护坡形式的进一步研究和工程应用提供参考。

In view of the problem that the slope protection by combining geocell protection and vegetation protection is easy to be affected by the climate and environment in the early stage of construction,which leads to instability and even overall landslide,the ecological slope protection method of filling wheat straw reinforced soil in the shallow layer of geocell is proposed.Through the artificial rainfall test of indoor slope model,the erosion resistance of different specifications of geocell slope and the slope with or without wheat straw reinforcement are compared and analyzed.The results show that the use of geocell and wheat straw reinforced protection can effectively improve the erosion resistance of the slope with incomplete vegetation;only the erosion of the geocell reinforced protection slope is 27.58% of the erosion of the bare slope,and the erosion of the geocell and wheat straw reinforced protection slope is only 15.72% of the erosion of the bare slope;under the same conditions,the smaller the size of the geocell,the better the erosion resistance of the slope.The experiment results can provide reference for further research and project practice.