Research On W-OH Ecological Protection Technology Of Granite Residual Soil Slope

The granite residual soil is the product formed by the long-term physical and chemical action of granite,and is widely distributed in southern China.Due to the influence of the nature of the parent rock and weathering,the development of fissures and the content of kaolinite in the residual granite soil are relatively high,and the soil is prone to softening and disintegration.unstable.However,in engineering,granite residual soil slopes are often identified as soil-like slopes,and soil slope ecological protection technology is used to protect them.However,traditional soil slope ecological protection technologies,including hydraulic spraying,soil spraying,and vegetation concrete,all have certain defects.Among them,hydraulic spray seeding and foreign soil spray seeding have weak scour resistance when the vegetation has not yet developed,and cannot effectively protect the slope soil;although vegetation concrete has good scour resistance,the concrete material is not only expensive,and it is difficult to degrade in the natural state,and it is easy to affect the ecological environment of the slope.W-OH(modified hydrophilic polyurethane)is a macromolecule environmentally friendly material that does not contain harmful components such as heavy metals.After reacting with water,it will form a porous elastic solidified body with good mechanical properties,which has a good anti-runoff erosion effect..Therefore,this paper starts with improving the early scour resistance of slope ecological protection technology,and plans to use W-OH for ecological protection of granite residual soil slopes.The specific research contents are as follows:(1)Through disintegration test and plant seed development test,the influence of W-OH on the disintegration characteristics of granite residual soil and the development of plant seeds was analyzed,and the concentration and spraying amount of W-OH solution suitable for ecological protection of granite residual soil slope were preliminarily screened..(2)Carry out the simulated rainfall scouring test for the undisturbed granite residual soil slope,and adjust the rainfall intensity,rainfall duration,slope slope and W-OH solution concentration based on the W-OH solution concentration and spray amount selected from the disintegration test and the plant seed development test.,to discuss the improvement effect of W-OH on the early scour resistance of granite residual soil ecological protection slopes.(3)Based on the W-OH ecological protection slope test,the effect of W-OH on plant growth and development was analyzed,and the impact of ecological protection on the erosion resistance of the slope was studied through the rainfall scour test.Finally,the economic method was used to calculate the W-OH ecological protection technology.ecological value.