| With the rapid development of China’s highway construction in recent decades, the researches on ecological protection technology of highway slope and mechanics analysis of slope protected by plants theory are more and more widely and deeply done. But due to the study started later, there is much gap with Europe, America, Japan and other developed countries. Based on the domestic and international research literature, the theoretical analysis, simulation washout test, field test, numerical analysis and other means are used to study the vegetation protection mechanism and soil hold technologies of broken rock slope in this paper.Firstly, the soil hold mechanism is discussed through protection mechanics effect and hydrological effect of the rock slope and the flushing prevented action. And the mechanical characteristics between the plant root and rock-soil materials are studied through the root-soil interaction model. The main factors of plant roots holding the soil are than discussed. Second, through the flushing prevented test indoor, the prevent erosion performance of the bermuda grass, bahiagrass, festuca arundinacea and trifolium repens under different slope grade, soil holding method and rainfall intensity is discussed. Meanwhile, the field tests are done based on the laboratory test. And the test results are compared and analyzed. Thirdly, the use effect of diamond barbed wire and geocell is evaluated through the soil holding methods field test of broken rock slope vegetation protection. And the applicable condition of these two methods is analyzed in different engineering section. The growth of the whole grass mixed seeding and the slope greening law is evaluated. Finally, based on the existing research, the soil holding mechanism of the three-dimensional geotechnical net, lozenge iron net and geocell is analyzed. The design, construction method are put forward. And the soil holding effect is simulated and analyzed by the numerical analysis method. |
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