Study On The Erosion Mechanism And Treatment Of Jilin Qian’an Mud Forest National Geopark In The North Ditch Of The Zhongruzijing

The north ditch of the Zhongruzijing which locates in the formation area of the Mud Forest National Geopark,Erosion scattered disasters along the gully slope development,and has a large area threatening the villagers,houses and farmland,and restrict the development of mud forest landscape.At present,the vertical crevice of the top of the slope and the development of the beaded bead,and the area of the subsurface erosion is increasing year by year.Due to the special soil,but also by the infiltration of surface water and the role of groundwater erosion,The erosion mechanism which in the north ditch of the Zhongruzijing is unique,with different slope collapse,landslide damage form before,there is no perfect evaluation system on this failure mode.Therefore,it is of great theoretical significance and urgent practical significance to analyze the mechanism and evolution process of the subsurface damage,and to establish the evaluation method of the scattered slope.The governance of the mud forest scattered erosion disaster has been started in 2013.However,from the view of the present treatment effect,the management project have failed due to a lack of understanding of groundwater potential erosion.In this paper,according to formation mechanism of subsurface erosion in the north ditch of the Zhongruzijing,with the maximum guarantee mud formation area landscape integrity as the basic principle,Based on the analysis of the suitability of various methods,the paper put forward some suggestions for the treatment of the potential damage to the subsurface.The main achievements of this paper are as follows:(1)Geological survey,collection of relevant geological and meteorological data,which in the area of the north ditch of the Zhongruzijing,and the geological conditions such as topography,stratum and groundwater level were identified;(2)In the area of the north ditch of the Zhongruzijing,the soil particles are mainly composed of powder and the content of soluble salt,which is easy to be attacked by surface water and groundwater erosion.The porosity is high and the vertical joint development,there is good verticality in dry state,the top of the slope along the joint fracture occurred under the seepage erosion;(3)Through the filed investigation,this paper analyzes the damage process of the subsurface erosion in the north ditch of the Zhongruzijing,and starts from the process of the erosive mechanics and the process of the subsurface erosion,To establish the evaluation method for subsurface erosion.This method is used to evaluate the stability of four typical sections in the north ditch of the Zhongruzijing;(4)Based on the variety of management methods and the damage mechanism of the north ditch of the Zhongruzijing,The paper puts forward the comprehensive treatment schemes,such as intercepting ditch,horizontal drainage hole,erosion resistant structure.