Experimental Study On Protective Effect Of ARVS System On Expansive Soil Slope

The protection and treatment of expansive soil slopes has always been a difficult problem in the field of Geotechnical Engineering,.Due to the swell-shrink characteristics of expansive soil,the flexible protection for expansive soil slope is more suitable compared with the rigid protection method which is prone to brittle failure in the process of expansive soil slope protection.Anchored Reinforced Vegetation System is composed of High Performance Turf Reinforcement Mats(HPTRM)that is a high-performance three-dimensional geomat which can sustain large deformation and tension,.and Percussion Driven Earth Anchor(PDEA).In this paper,distributed fiber testing(BOTDR)technique is used to test the deformation of HPTRM caused by tensile stress in slope protection.Since the technology has not been put into flexible network monitoring,the indoor model test is carried out.In this paper,first,according to the protective effect of expansive soil slope in ARVS system,the basic mechanical parameters of the soil are tested in laboratory and the application of distributed fiber optic technology in flexible network monitoring whether is validated by the indoor model test.Second,both of the group one of which was laid with ARVS system protection and the other was laid with ordinary grass use the soil moisture meter,earth pressure cell and pore water pressure gauge on for long-term monitoring.Finally,the protective effect of ARVS system was confirmed by comparing of the two group of the data.The main conclusions of this paper are as follows(1)Using the indoor model test which employs distributed fiber test technology for the monitoring of the flexible geonet and Comparing the calculated figues of the dial indicator and the real monitoring figures of distributed optical fiber test shows that the distributed optical fiber testing technology can be applied to the deformation monitoring of HPTRM Geonet used in ARVS System(2)Based on the monitoring slope protection data of two different protection systems,it is concluded that ARVS system has obvious advantages mainly in water and soil conservation,reducing the variation of soil water content,reducing the expansive force of the expensive soil slope on the lattice,and reducing the swelling deformation of the slope...