Study On Ecological Protection Technology Of Subgrade Slope

With the continuous development of China’s economy,ecological environmental protection projects and green landscape projects have become an important part of the implementation of engineering projects which we must face,ecological environmental protection link has been increasingly valued in the implementation.In recent years,with the advancement of "area" national strategy,mass new road will inevitably produce a large amount of excavation and backfill,especially in the fragile ecological system of the northwest mountainous area,the terrain ups and downs,to the large number of implementation of slope protection,destroyed the original vegetation ecosystem,highway construction under the protection of the ecological environment pressure is more and more big.Therefore,how to build safe,meet the traffic function requirements and environmental protection requirements of highway has become an urgent problem to be studied and overcome in municipal highway engineering.In view of the current situation of highway in the protection of the environment,driving visual comfort,improve the stability and safety of highway foundation,in order to solve the mountainous areas of sichuan slope protection of a variety of types,fragile ecological environment,adequate rainfall,soft soil resulting in slope protection safety and ecological problems.Based on the analysis of several typical ecological slope protection used in highway,this paper systematically studies the adaptive range of different ecological slope protection from the influence of rainwater infiltration on foundation safety,the formation process of vegetation ecosystem and the actual engineering effect.The research focuses mainly on the following aspects:(1)the major geological disasters occurring in slope protection are mainly in the process of rainstorm.Therefore,in this study,the influence of different ecological slope protection on rainwater infiltration in the process of rainfall was analyzed from the perspective of rainfall intensity and rainfall time.(2)in the process of ecological slope protection is a ecosystem,shrubs and trees growth process,considering the test time is limited,only the ecosystem and shrub plant growth process,through the analysis of the ecological system in plant growth and the distribution of vegetation and different vegetation ecological slope protection solutions;(3)according to the actual engineering cases,studying the influence of different parameters on the safety factor of embankment stability by controlling variable method,the types of slope protection,drainage design and plant proportion in the implementation of slope protection during the implementation of the project are analyzed to obtain the applicable scope of the project and the optimal engineering parameters.Main conclusions are drawn from the above research:(1)the rain on the slope of the saturation line are not parallel analysis,and presents the shallow deep under the law,this suggests that the lower part of slope in addition to the vertical directly collect rainwater infiltration,also will accept the bottom level of accumulation of rainwater infiltration,which results in the decrease of strength of foundation bottom,a serious threat to the stability of the foundation,therefore need to collect water discharge in time,reduce the possibility of disasters.(2)according to the test results of different slope protection on rainwater infiltration,the ecological compartment slope protection can grow grass better,and at the same time,the ecological compartment can quickly discharge rainwater,and the foundation has a good resistance to rainwater infiltration performance.Therefore,compared with the ecological compartment,it has both the greening aesthetic performance and the foundation stability performance.(3)heavy rainfall for a long time has serious harm to the stability of slope protection.In practical projects,it is necessary to take manual inspection measures in case of severe weather to ensure the smooth discharge of rainwater and take temporary warning and rescue measures for possible geological disaster areas.(4)during the formation of ecological slope protection,seedlings were planted in February,and the first two months were in the adaptation period,and their growth rate basically stopped;From may to July,the growth rate gradually increased.After July,due to the high temperature in summer and low temperature in winter,the growth rate gradually decreased.The iris and white trifolia planted basically died out.(5)different ecological slope protection to form stable ecological system to be more than 2 years,geotextile than minimum ecological slope protection of wild plants,ecological network ecological slope protection and planting grass slope protection of wild plants is more,so considering the role of landscape effect of the geotextile in the recommended ecological slope protection,economy and practicability,the proposal USES ecological ecological slope protection and planting grass slope protection.