Study On The Hydraulic Characteristics Of Fiber Permeability

The roadbed drainage system is an important part of the road structure,which is of great significance to improve the stability of the road and reduce the destruction of the road.The increase of the fine water in the subgrade increases the occurrence of the roadbed freeze and further reduces the bearing capacity of the roadbed.Based on the working mechanism of the traditional underground drainage in the subgrade and the defects of the engineering practice,the paper in-depth studies the drainage influence factors of fiber drain,puts forward new roadbed drainage device,and provides a certain basis for research and development of new material.In this paper,the author summarizes the mechanism and application of subterranean drainage system and analyzes the existing problems.Through the study of the structure and mechanism of the traditional drainage system,the author determines the research content,test principle and test equipment,and test program is worked out.The paper studies the hydraulic characteristics of fiber drainpipe from three aspects.The capillary effect of pore rate and tube diameter on fiber porous media is verified by the height of capillary rise.In this paper,the permeability of fiber porous medium under different porosity is studied by means of permeability.Based on the change of water content,the trend of water characteristic curve of fiber porous media is investigated.Through analyzing the different influence factors of experiment,the paper reveals the hydraulic characteristics change of the fiber porous medium under different conditions,and gets the index of the fiber drain technology.On the basis of theoretical analysis and test,paper determines the new drainage structure and micro influence factors through the research on technical indicators of fiber porous medium,and puts forward the evaluation indexes and influencing factors.These researches have good practical effects for solving the capillary water rise in the roadbed.