Different Rainfall Conditions On Collapsing Erosion Effects And Model Tests On The Control Method

This paper analyzes the relationship between the slope collapse erosion damage characteristics and soil physical and chemical properties of the parent material,and the relationship between different rainfall conditions and sediment,study the erosion mechanism principle,predict the sediment characteristics,explore the new method of slope collapse control by high polymer cementing material.The main contents are as follows:(1)Study on geological environment of typical landslidesThrough the collection of existing research results and ground engineering geological survey,in the full investigation of the official Town Based on avalanche Gang group,in-depth analysis of the root cause collapse occurrences and erosion process,and compared with other lithology,human engineering activities that cause soil mechanics properties of viscous attenuation,and the granite clay shear strength is sensitive to water big reason is the prerequisite for the collapse of hillock,gravel sand with high porosity,high vertical permeability coefficient and low liquid limit index,is the important conditions for further erosion of the post collapse,this provides a detailed basis for the follow-up study of collapse gully erosion.(2)Experimental study on erosion and sediment yield under the pure natural conditionThe amount of sediment yield is closely related to the rainfall and its duration.As rainfall,cumulative sediment yield increased with the increase of rainfall,from different site conditions,the amount of runoff and sediment yield of bare land is the highest.The order of the accumulative amount of the runoff and sediment yield under five different site conditions is: Bare ground > trees > shrubs > trees + table camp-> shrubs + platform.These conclusions have a certain universal applicability to the slope collapse study in Fujian Province.(3)Model tests of high polymer cementing material on the control of slope collapseUnder the condition of the treatment by high polymer cementing material,the displacement of the slope collapse under different loading is analyzed.The results show that30 kPa loading can cause a complete collapse of the model without treatment,but the model after treatment is still intact under the loading of 48 kPa.At the same time,from the overall macroscopic view,the deformation of the model after treatment is very small.Therefore,it is proved that the treatment scheme of the mixture of "high polymer-sand" aiming on such exposed slope collapse is effective and feasible.