Method for constructing an environmentally-friendly retaining wall using soil bags for vegetation and fixing members, and installation structure thereof

Abstract

The present invention relates to a method for constructing an environmentally-friendly retaining wall using a soil bag for vegetation and fixing members and an installation structure thereof, in which the retaining wall is constructed by staggering soil bag blocks filled with regular amounts of soil. In detail, the upper and lower soil bag blocks are firmly fixed into a single body by a plurality of fixing members of a predetermined shape, a geogrid sheet of a predetermined length is set up and firmly fixed to the fixing members to form a retaining wall, a core net is installed on the surface of the retaining wall, soil and seeds of plants to be vegetated are mixed, and the mixture is placed so that the seeds can be actively germinated and the surface of the retaining wall can be fully afforested, thus not only enabling easy storage, transportation and installation of materials for the construction of the retaining wall, improving work efficiency and workability, and shortening the working time and reducing the economic burden of a constructor, but also improving the firmness and stability of the retaining wall by connecting and fixing a plurality of soil bag blocks into a single body through the fixing members, improving the germination of seeds, enabling the roots of germinated plants to be easily struck into the soil bag blocks, and thus providing perfect areas of greenery on the surface of the retaining wall.

1 . A method for constructing an environmentally-friendly retaining wall using a soil bag for vegetation and fixing members, and an installation structure thereof for protecting a structure formed in a mountain or a hill, a road or a slope at a river, comprising:
 a first step in which a soil and sand supplied from a surrounding place of a construction site of a retaining wall are prepared, and a plurality of soil bags having certain standard sizes with the upper sides being open for receiving and storing the soil and sand are prepared, and a plurality of fixing members for connecting and fixing the soil bag blocks are prepared, and multiple sub-materials such as a plurality of geogrid sheets, a core net and seeds needed for the construction of the retaining wall are prepared;   a second step in which a base layer is formed by flattening the surface of ground of a certain range in which the retaining wall is to be constructed through a basic construction;   a third step in which the soils and sand are filled via the opened upper side of the soil bag prepared in the first step, and when accurate amounts of soils and sand measured by a fixed measuring meter are filled, the opened upper side of the soil bag is tied and inputted into a standard forming machine and is vibrated and compressed for thereby forming a rectangular parallelepiped shaped soil bag block having an excellent strength;   a fourth step in which a first column layer is formed by continuously arranging a plurality of soil bag blocks in a horizontal direction on the upper side of a base layer formed in the second step, and an end of the fixing member is struck to penetrate up to the base layer through the upper side of the soil bag block, so a plurality of soil bag blocks are firmly fixed at the base layer for thereby forming a first column layer;   a fifth step in which a second column layer is formed by continuously arranging a plurality of soil bag blocks in a horizontal direction on the upper side of the first column layer formed in the fourth step, and in a state that an alternating engagement is made in such a manner that the centers of the soil bag blocks forming the second column layer are positioned at the upper side of the engaged portion with which the soil bag blocks forming the first column layer contact, a plurality of the fixing members are struck from the upper side of the soil bag blocks forming the second column layer, so the end of the fixing member penetrate into up to the intermediate height of the soil bag blocks forming the first column layer for thereby firmly fixing the second column layer;   a sixth step in which a retaining wall is constructed up to a desired height by repeatedly performing the fifth step, and an end of the geogrid sheet having a certain length at a certain interval is inserted into the fixing member which fixes the soil bag blocks and is firmly fixed at the soil bah block with the aid of the striking of the fixing member, and the other end of the geogrid sheet is horizontally elongated toward the backside of the retaining wall and is buried when filling soils for thereby supporting the soil bag blocks;   a seventh step in which one end of each of two geogrid sheet is positioned at the upper sides of the soil bag blocks at regular intervals to be constructed on the upper most portion of the retaining wall formed in the fifth and sixth steps and and the two ends of the same are concurrently fixed by means of the fixing members, and the other end of one geogrid sheet faces the front side of the retaining wall, and the other side of another geogrid sheet faces the backside of the retaining wall, and in this state the geogrid sheet facing the front side surrounds the soil bag block positioned at the upper most portion, and the other end is extended in the direction of the backside of the retaining wall and is overlapped with the geogrid sheet facing the backside, and the soil bag blocks are stacked on the upper side of the same and are constructed in a dual structure, and the other end of the geogrid is buried when filling with soils for thereby forming an upper layer of the retaining wall;   an eighth step in which a core net woven with palm fiber or hemp fiber is installed over the whole surfaces of the retaining wall constructed in the seventh step; and   a ninth step in which a mixture is made by mixing seeds to be planted at the core net installed in the eighth step, soils and humectants at a certain ratio and is cast with a certain thickness by means of a pumping apparatus for thereby forming a greenery layer, and the seeds germinate as time passes for thereby making greenery on the surface of the retaining wall.   
     
     
         2 . A method for constructing an environ mentally-friendly retaining wall using a soil bag for vegetation and fixing members according to  claim 1 , wherein the seeds are absorbed and rooted at the core net along with the soils mixed with humectants before the core net is installed at the whole front sides of the retaining wall in the eighth step, so it is possible to make greenery on the surface of the retaining wall without performing the ninth step. 
     
     
         3 . An installation structure of an environmentally-friendly retaining wall using a soil bag for vegetation and fixing members for protecting a structure formed in a mountain or a hill, a road or a slope at a river, comprising:
 a base layer which is formed so as to maintain a flattened state by performing a basic construction with respect to a ground in which a retaining wall is to be installed;   a plurality of soil bag blocks which are filled with soils and sand by certain amounts and are vibrated and compressed to be formed in rectangular parallelepiped shapes;   a fixing member in which a first column layer is formed by horizontally installing the soil bag blocks on the upper side of the base layer, and an alternating engagement is made in such a manner that the centers of the other soil bag blocks are positioned at the upper sides of the portions in which the soil bag blocks forming the first column layer are alternately engaged with each other and are struck for thereby forming a second column layer, and a plurality of fixing members are struck into the upper sides of each soil bag block for thereby integrally connecting and fixing the first column layer and the second column layer while vertically passing through the first column layer and the second column layer, respectively;   a plurality of geogrid sheets of which one end of each sheet is inserted into the fixing member and is firmly fixed between the soil bag blocks by means of striking, and the other end of each sheet is horizontally elongated in a backward direction and is buried by means of soil filling, with the geogrid sheets being installed at regular intervals and at constant heights for thereby supporting the soil bag blocks, respectively;   an upper layer constructed in such a manner that the first column layer and the second column layer are constructed up to a certain height by repeatedly performing the operations that the geogrid sheets are fixed at regular intervals by means of the fixing members for thereby firmly and integrally connecting and fixing a plurality of the soil bag blocks, and the soil bag blocks installed on their upper sides surround the geogrid sheets at regular intervals and are elongated to the backside of the retaining wall, and the soil bag blocks are stacked on the upper sides of the other side of the geogrid sheet, and the other end of the same is buried by soil filling;   a core net which is provided in a net shape woven with palm fiber or hemp fiber and is installed at a front side of the retaining wall made of the first column layer and the second column layer; and   a greenery layer which is formed in such a manner that soils mixed with seeds are cast with a certain thickness for making greenery on the surface of the core net installed at the retaining wall.   
     
     
         4 . An installation structure of an environmentally-friendly retaining wall using a soil bag for vegetation and fixing members according to  claim 3 , wherein both sides of the lower portion are sewed when processing the soil bag, and the sewed line has a certain length, and the soil bag is made inner side out, and soils and sand are filled into the soil bag block and is formed in a rectangular parallelepiped block shape with a constant height, so with the aid of the above construction, an alternating engagement is made easier when constructing by laying the soil bag blocks in a horizontal direction. 
     
     
         5 . An installation structure of an environmentally-friendly retaining wall using a soil bag for vegetation and fixing members according to  claim 3 , wherein an organic fertilizer and polymer humectants extracted from plants are mixed at a certain ratio with the soils and sand to be filled into the soil bag and are inputted and agitated into the soil bag, by which it is possible to shorten germination period. 
     
     
         6 . An installation structure of an environmentally-friendly retaining wall using a soil bag for vegetation and fixing members according to  claim 3 , wherein said fixing member is formed of a pole of which lower side is conical so that the fixing member can easily penetrate into the soil bag block, and a plurality of barbs integrally protruded from both lower sides of the pole and formed so as to prevent the pole from being separated from the soil bag block, with a T shaped fixing piece being formed at an upper side of the pole, a conical fixing protrusion being integrally formed at both lower sides of the fixing piece so that it can be inserted into the soil bag block for thereby supporting the pole. 
     
     
         7 . An installation structure of an environmentally-friendly retaining wall using a soil bag for vegetation and fixing members according to  claim 3 , wherein the elongated length of the geogrid sheet is selectively cut depending on the change of the installation position, and the length is about 70% of the installation height, and the height of the installation interval is preferably about 70˜80 cm, and the width of the installation intervals is determined to an extent that one geogrid sheet can be installed per two or three soil bag blocks. 
     
     
         8 . An installation structure of an environmentally-friendly retaining wall using a soil bag for vegetation and fixing members according to  claim 3 , wherein said greenery layer is formed so as to make the greenery on the whole surfaces of the retaining wall in such a manner that a mixture made by mixing soft soils around construction sites and seeds of plants to be used for making greenery and humectants extracted from plants, fibers and coloring agents and by agitating the same is cast on the surfaces of the retaining wall by using a separately supplied pumping apparatus, in which the core net is installed, at a certain thickness. 
     
     
         9 . An installation structure of an environmentally-friendly retaining wall using a soil bag for vegetation and fixing members according to  claim 3 , wherein said seeds are preferably matured for 2˜3 days at 30˜35° C. so as to enhance the germination rate. 
     
     
         10 . An installation structure of an environmentally-friendly retaining wall using a soil bag for vegetation and fixing members according to  claim 8 , wherein said seeds are preferably matured for 2˜3 days at 30˜35° C. so as to enhance the germination rate.