Research On Fiber Reinforced Polymer Composite Protective Material Of Loose Slope

Highway subgrade side slope failure is common in highway engineering geological disasters, main source in the rain washed, when loose subgrade soils exposed to drought and rainstorm alternating environment by rainfall erosion, infiltration, extremely easy to occur soil erosion, caused by embankment collapsed. Study on the anti erosion of highway subgrade slope, especially the research on the development and utilization of the new control method is poor. In this paper, the characteristics of dry and cold climate and the characteristics of desertification ecological environment are studied. This paper mainly adopts fiber content, fiber length, double poly material content for the three factors, and separately from the three levels of three factors and three level orthogonal test, through the investigation of the permeability coefficient, compressive strength and direct shear strength comes to the best combination of ratio of these three factors. On the basis of the ratio of wet and dry cycle and freeze thaw cycle test, and the test of the sample without adding fiber as a comparative test reference group, to investigate the performance of the two kinds of environment. Through the investigation of the morphological characteristics, permeability coefficient, direct shear strength change, the freeze-thaw cycle was analyzed by the changes of the morphological characteristics, permeability coefficient, compressive strength and shear strength. The structure and action mechanism of Fiber Reinforced Polymer Strengthened with fiber reinforced polymer were obtained. After the completion of the indoor test of fiber reinforced double poly reinforcement material of preliminary investigation, Xiao Qi tunnel on the north side at Xue Cheng Village in Lixian County, Sichuan Province, miscellaneous brain River Valley on the left bank of the natural collapse accumulation fan to engineering practice in the field, establishment of natural slope, three-dimensional net spray sowing slope protection, lattice structure slope protection as contrast group. The artificial simulation of scouring process of runoff and sediment was evaluated and further verify the possibility of field application of the material.The main conclusions of this paper are as follows:1?On silty sand, through orthogonal test, it is concluded that the best ratio of fiber reinforced double polymer reinforced soil, make final preparation of new reinforcement soil has good waterproof performance, high strength, anti collapse and antifreeze performance characteristics.2?A fiber reinforced type double poly material resistance of dry wet circulation performance significantly, although in circular process with double poly material loss, the material moisture content, shear strength, permeability of a certain degree of decline, but the fiber join of cyclic wetting drying moisture absorption desorption volume changes have significant effects on interference resistance, attained the expected us to strengthen the object.3?The material of the freezing and thawing resistance of excellence, in before and after freeze-thaw did not appear obvious frost, without cracks. But the strength of the material has a downward trend, it is worth further study.4?In the field practice, the following conclusions can be drawn:Fiber can significantly inhibit the double poly reinforced soil stem shrinkage cracks and under the conditions of natural rainfall erosion resistance than the other three experimental contrast slope has obvious advantages, basic erosion phenomenon did not occur.5?This kind of fiber reinforced polymer reinforcement material for vegetation germination, growth of the auxiliary function is very obvious: the germination rate and growth of the slope between 1.5~2 times. On the loose slope to play the early anti erosion, the role of the latter. Then, the effect of seepage prevention and solidification can be strengthened by the interaction of plant roots and the longitudinal and transverse slope of the slope.6.In the field experiment,the materials' performance of the seepage prevention and cure is fully tested, the effect is very excellent, have the value of further popularization and research.