Experimental Study On Performance Characteristics Of "Plant Pile+ Grit Stone" Revetment

Keep the bank with the necessary permeability is one of the basic requirements of river ecological slope protection,its easy to "water" and "shore" is the exchange of material between free,provided conditions for the growth of plant.Extensively used at this stage the opening of chain type concrete bricks,stone cage wire gauze pad,such as ecological concrete slope protection technology,meet the requirements,is regarded as the ecological slope protection technology.Consists of natural stone and plants,by contrast,the "plant pile + the grit stone slope protection system has better permeability,more ecological.Natural stone strong weathering resistance,plant growth and stem coarsen and points of action to further improve the stability of the slope surface protection system.Visible,"plant pile + the grit stone" slope protection system has certain advantages and good application prospect.Research,the paper reveals "plant pile + the grit stone" slope protection system work character is has major practical significance.This paper analyzes the research situation of riverbank protection at home and abroad,compared the advantages and disadvantages of the existing bank slope protection technology,On this basis,the use of indoor physical model test method of "plant pile + the grit stone" riverbank protection stability as well as to the effect of the velocity of flow through the guarded body surface are studied,The main research work and achievements briefly as follows:(1)In this study,the work characteristics of the physical model of the protective body of the "plant pile + scatter stone" were studied under different conditions.(2)On the premise of satisfying the starting grain size,the smaller the particle size of the particle size,the rougher the surface,the better the stability of the slope protection model.Grain stone physical model of slope stability of slope and the grain body slope sliding slope change with plant pile physical model distribution density and the tendency of the present can be divided into three stages: When pile plant phase one,that is,the physical model of distribution density less than 15 cm,at this time the stability of the riverbank protection body physical model depends mainly on the grit stone physical model the friction between the particles;Phase two,that is,when the physical model of plant pile distribution density between 5 ~ 15 cm,at this time the stability of the riverbank protection body physical model of plant pile anchorage effectof the physical model and the grit stone physical models assume jointly the friction between the particles,the physical model and the plants pile distribution density increasing,physical model plant pile distribution density provide help on the stability of riverbank protection body physical model gradually occupy the initiative;Phase three,that is,when the physical model of plant pile distribution density is greater than 5 cm,at this time the stability of the riverbank protection body physical model is mainly composed of plant pile physical model of anchoring effect.(3)The effect of the protective body on the slowing effect of the water flowing through the surface of the water is borne by the plant and the scattered stones.Reduction ratio change with plant pile physical model distribution density and the change tendency of the present can be divided into three phases: phase one,namely physical model when plant pile distribution density of less than 15 cm,riverbank protection at this time of the physical model of the surface water flow velocity slow ability mainly depends on the grain roughness on the surface of the body physical model;Phase two,that is,when the physical model of plant pile distribution density between 5~ 15 cm,riverbank protection at this time of the physical model of the surface water flow velocity slow ability by pile physical model of the plant and grain roughness on the surface of the body physical model to share,and the plants pile physical model of distribution density increasing its role also gradually to increase;Phase three,that is,when the physical model of plant pile distribution density is greater than 5 cm,riverbank protection body physical model's ability to slow flow velocity through the surface mainly by plant pile physical model.