红层泥岩边坡生态防护机制研究

STUDY ON ECOLOGICAL PROTECTION MECHANISM OF RED BED MUDSTONE SLOPE

生态防护已较广泛地应用于红层边坡,但红层边坡生态防护的理论尚未进行系统研究。选择典型工点,对红层泥岩边坡进行生态防护前后的现场降雨试验和边坡浅层的温度场、含水量的长期监测试验,研究红层泥岩边坡生态防护控制表层快速风化的机制。总结出生态防护主要通过消除红层泥岩风化碎屑的冲蚀、改变红层泥岩坡体浅层的温度场和含水量三方面的功能来控制红层泥岩边坡的快速风化。更为重要的是,高温季节时生态防护避免了雨水与红层泥岩边坡表面的直接接触,使浅层坡体不会产生过高的温差,从而消除了泥岩表层因热应力引发的快速风化。

The ecological technique has been widely applied to the protection of the red bed slope recently; nevertheless the red bed mudstone slope ecological protection theory is not systematically studied. By selecting the typical red bed mudstone slope, the mechanism of the ecological protection of the fast weathering of the red bed mudstone slope surface is studied by the field rainfall tests with the ecological protection and without it and the long-term monitoring tests on the temperature field and the moisture content of the shallow layer of red bed slope. It is concluded that the ecological protecting functions on the fast weathering of the red bed mudstone slope include eliminating the weathering material erosion and changing the temperature field and the moisture content of the shallow layer bed mudstone slope. More importantly, the ecological protection prevents the red bed mudstone slope surface from rain, making no high difference in temperature and the thermal stress in the shallow layer. So, the fast weathering of the surface is eliminated.