长江下游特拉锚垫防护结构下土质岸坡稳定性研究

玉带洲位于长江下游段,岸坡后方存在大型湖泊,坡后渗流问题较为严重。为确保岸坡安全,提高岸坡整体稳定性,减少水土流失量,需要对岸坡进行合理的防护处理。通过物理模型分别模拟岸坡在特拉锚垫防护结构、裸土段的渗流情况进行对比试验,设置若干观测点,运用MATLAB软件绘制岸坡渗流前后三维地形图,观测岸坡设置点的位移情况。结果表明,渗流后有特拉锚垫防护结构的观测点最大位移量为2 cm,裸土段最大位移量为5.1 cm;特拉锚垫段渗流前后的地形图趋于吻合,说明特拉锚垫对于坡后渗流有较好的防护效果。

Stability of soil coast slope under protective structure of Terra blok mat in lower reaches of the Yangtze River

Yudai Island is located in the lower reaches of the Yangtze River,there is a large lake behind the shore slope,so the problem of post-slope seepage is serious.To ensure the safety of the shore slope,improve the overall stability of the shore slope,and reduce the amount of soil erosion,the shore slope needs to be reasonably protected.Through the physical model,we simulate the seepage of the shore slope under the protective structure of the Terra blok mat and the shore slope of the bare soil section to carry out the comparison test,set several observation points,use MATLAB software to draw the three-dimensional topographic map before and after the seepage,and observe the displacement of the shore slope setting points.The results show that the maximum displacement of the observation point with the protection structure of the Terra blok mat after seepage is 2 cm,and the maximum displacement of the bare soil segment is 5.1 cm.The topographic maps of the Terra blok mat section before and after seepage are consistent,which can illustrate that the Terra blok mat has a good protective effect on post-slope seepage.