Slope reinforcement method and retaining wall constructed using it

Abstract

The present invention comprises the steps of: (a) constructing a perforated hole portion on a slope; (b) connecting a fixing portion to a reinforcing member equipped with a tension providing portion and inserting it into the perforated hole portion; (c) filling the perforated hole portion with grout material to integrally form the fixing portion on the slope; (d) tensioning the reinforcing member outward from the perforated hole portion and fixing it to the slope; (e) constructing a retaining wall panel adjacent to the slope and connecting the reinforcing member and the retaining wall panel; and (f) pouring backfill material between the retaining wall panel and the slope and finishing the outer wall of the retaining wall panel, wherein in step (d), when the reinforcing member is tensioned, the tension providing portion is compressed and the reinforcing member protrudes from the fixing portion, and when step (d) is completed, the tension providing portion that was compressed is restored to its original state, thereby providing tension that pulls the reinforcing member inward from the perforated hole portion by means of elastic force.

Description

Technology Field

[0001] The present invention relates to a slope reinforcement method and a retaining wall constructed using the same. More specifically, the invention relates to a slope reinforcement method and a retaining wall constructed using the same, wherein a fixing part is provided at the inner end of a reinforcing member inserted into a drilled hole to provide a supporting force for supporting a retaining wall panel connected to the outer end of the reinforcing member, and a tension providing part is provided to provide a tension that pulls the reinforcing member into the drilled hole to improve the supporting force of the retaining wall panel. Background Technology

[0002] In general, soil nailing is the most widely used stabilization method to suppress slope collapse or sliding phenomena.

[0003] Soil nailing is a construction method that forms a composite reinforced ground by installing reinforcing materials (nailing devices) on the original ground to maximize the utilization of the original ground's strength, thereby increasing the shear and tensile strength of the ground to suppress displacement and prevent ground loosening.

[0004] The basic design concept of the soil nailing method is that the reinforced soil wall maintains stability on any slope by ensuring that the land in the area reinforced by the nailing device acts like an integrated retaining wall.

[0005] Soil nailing has been used for temporary earth retaining structures and foundation excavation, but recently, its applications have expanded significantly to include reinforcing road slopes, railways, dams, tunnel portals, and rock masses.

[0006] The general construction steps of the soil nailing method include the step of excavating the slope or excavation surface to a stable height where it can stand on its own, the step of drilling the ground on the slope or back of the excavation at an angle of 10° to 20° relative to the horizontal, the step of installing nails in the drilled holes and grouting, and the step of applying shotcrete for surface protection; after which the steps of excavation, drilling, nail insertion and grouting, and shotcrete are repeated until the required height is reached.

[0007] Specifically, the soil-nailing method, which is used in construction projects for excavation, earth retaining, reinforcement of natural and artificial slopes adjacent to railways and roads, underground structures and tunnels, repair of existing retaining walls, and installation of retaining walls, involves a series of reinforcement operations carried out through the process of excavation or cutting. At the same time, the slope or excavation surface is excavated to a stable height that can stand on its own, and a surface protection surface is constructed with shotcrete. The back of the excavation is then drilled to insert nails, which are then grouted to form a reinforced soil body.

[0008] A nailing device according to the prior art is in the form in which a steel rod is inserted into a plurality of resin hollow tubes connected by a plurality of resin sockets. The plurality of sockets and hollow tubes are connected alternately.

[0009] Before the nailing device is installed on the excavation side, a deep embedment space is drilled in a downwardly sloping direction on the excavation side, and the nailing device is inserted into this embedment space. After the nailing device is inserted, grout such as cement paste or cement mortar is filled between the outer surface of the nailing device and the inner surface of the embedment space.

[0010] The grout surrounding the outer surface of the nailing device hardens to form a grout pile together with the nailing device, and after the grout hardens, a pressure plate is fitted onto the rod of the soil nail protruding outward from the excavation side and secured with a coupler and bolt, thereby completing the construction of the nailing device.

[0011] Therefore, in the nailing device, the steel rod is connected to the socket or hollow tube so as not to move along the longitudinal direction of the embedded space relative to the socket and hollow tube.

[0012] However, nailing devices according to conventional technology have the following problems.

[0013] The nailing device provides bracing stiffness against pull-out through the bearing pressure of the grout, and depending on the ground conditions, numerous joints exist around the embedded space where the nailing device is inserted.

[0014] Therefore, since the bearing plate is secured merely by couplers and bolts and the grout is filled by injection pressure, there is a problem in that it leaks out through joints when injected into the embedded space, resulting in a low filling rate within the embedded space and thus failing to substantially reinforce the ground.

[0015] In addition, there is a problem in that in order to separate the rod from the nailing device, the nailing device must be moved from the embedded space to the outside before the rod can be separated.

[0016] The background technology of the present invention is disclosed in Korean Registered Patent Publication No. 10-2176457 (published on November 9, 2020, Title of Invention: Soil Nail Device and Soil Nailing Method Using the Same). The problem to be solved

[0017] The present invention aims to provide a slope reinforcement method that improves the supporting force of a retaining wall panel by providing a fixing part at the inner end of a reinforcing member inserted into a drilled hole, providing a supporting force that supports a retaining wall panel connected to the outer end of the reinforcing member, and a tension providing part that provides a tension that pulls the reinforcing member into the drilled hole, and a retaining wall constructed using the same. means of solving the problem

[0018] The present invention comprises the steps of: (a) constructing a perforated hole portion on a slope; (b) connecting a fixing portion to a reinforcing member equipped with a tension providing portion and inserting it into the perforated hole portion; (c) filling the perforated hole portion with grout material to integrally form the fixing portion on the slope; (d) tensioning the reinforcing member outward from the perforated hole portion and fixing it to the slope; (e) constructing a retaining wall panel adjacent to the slope and connecting the reinforcing member and the retaining wall panel; and (f) pouring backfill material between the retaining wall panel and the slope and finishing the outer wall of the retaining wall panel, wherein in step (d), when the reinforcing member is tensioned, the tension providing portion is compressed and the reinforcing member protrudes from the fixing portion, and when step (d) is completed, the tension providing portion that was compressed is restored to its original state, thereby providing tension that pulls the reinforcing member inward from the perforated hole portion by means of elastic force.

[0019] The present invention comprises the steps of: (a) constructing a perforated hole portion on a slope; (b) connecting an anchor portion to a reinforcing member equipped with a tension providing portion and inserting it into the perforated hole portion; (c) filling the perforated hole portion with grout material to integrally form the anchor portion on the slope; (d) tensioning the reinforcing member outward from the perforated hole portion to fix it to the slope; and (e) constructing a retaining wall panel adjacent to the slope and connecting the reinforcing member to the retaining wall panel. and (f) a step of pouring backfill material between the retaining wall panel and the slope and finishing the outer wall of the retaining wall panel, wherein in step (d), when the reinforcing member is tensioned, the tension providing part is compressed and the reinforcing member protrudes from the anchoring part, and when step (d) is completed, the tension providing part that was compressed is restored to its original state, and the reinforcing member is pulled into the inner side of the drilled hole by an elastic force, and the slope is constructed by a slope reinforcement method.

[0020] The fixing member of the present invention may include a fixing body into which the reinforcing member is slidably inserted; a first plug installed at one end of the fixing body into which the reinforcing member is slidably inserted; and a second plug installed at the other end of the fixing body into which the reinforcing member is slidably inserted.

[0021] The above-described fixing body of the present invention may be provided with a plurality of fixing ribs that are impregnated with the grout material and formed integrally.

[0022] The first stopper of the present invention may be provided with a plurality of first ribs formed integrally by being impregnated in the grout material, and the second stopper may be provided with a plurality of second ribs formed integrally by being impregnated in the grout material.

[0023] The tension providing member of the present invention may include: a movable block installed in the fixing member and into which the reinforcing member is slidably inserted; a fixed member installed to be fixed to the reinforcing member and connected to the movable block; and an elastic member installed in the reinforcing member so as to be interposed between the movable block and the fixing member.

[0024] The fixing part of the present invention may include a plurality of wedge members installed in close contact with the reinforcing member; a coupling ring that simultaneously surrounds the plurality of wedge members to bring the plurality of wedge members into close contact with the reinforcing member; and a fastening block that simultaneously accommodates the plurality of wedge members and is fastened to the movable block.

[0025] The present invention may further include an injection part that supplies and fills the grout material into the bore hole along the reinforcing member; and a connecting finishing part that connects the reinforcing member and the retaining wall panel extending outward from the bore hole.

[0026] The injection portion of the present invention may include: an injection pipe that is inserted into the interior of the drilled hole portion along the reinforcing member and supplies the grout material; a fixing member that restrains the injection pipe and is connected to the reinforcing member; and a seating member installed on the reinforcing member to maintain a distance from the reinforcing member and on which the injection pipe rests.

[0027] The connection finishing portion of the present invention may include: a back panel installed on the retaining wall panel to restrain the reinforcing member passing through the through hole portion of the retaining wall panel; a front panel installed on the retaining wall panel to restrain the reinforcing member passing through the through hole portion of the retaining wall panel; and a fastening member fastened to the reinforcing member passing through the retaining wall panel and seated on the front panel.

[0028] The present invention may further include a corrosion-preventing member that surrounds the retaining wall panel or the connecting finishing member to prevent rainwater or groundwater from coming into contact with the retaining wall panel or the connecting finishing member. Effects of the invention

[0029] The slope reinforcement method according to the present invention and the retaining wall constructed using the same have an advantage in that, since an anchoring part is provided at the inner end of a reinforcing member inserted into a bore hole, the anchoring part can be constructed integrally with the inner end of the bore hole as the grout material injected into the bore hole hardens, so that when the tensioning process of the reinforcing member is carried out, the inner end of the reinforcing member is maintained in a fixed state inside the bore hole by the anchoring part, thereby effectively providing a reinforcing force that compresses the slope by the tensile force provided to the reinforcing member.

[0030] The slope reinforcement method according to the present invention and the retaining wall constructed using the same have the advantage of being able to continuously provide compressive force to the slope by providing a tension providing part in which a reinforcing member inserted into the anchoring part is slidably installed and an elastic member is interposed between the reinforcing member and the anchoring part, so that the elastic member is compressed during the tensioning process and even after the reinforcing member is fixed to the pressure plate, tension is provided to pull the reinforcing member into the drilled hole part by the elastic force provided from the elastic member.

[0031] The slope reinforcement method according to the present invention and the retaining wall constructed using the same are provided with a plurality of anchoring ribs protruding from the anchoring body, so the grout material filled between the anchoring part and the bore hole part hardens while being integrally combined with the anchoring ribs, thereby having the advantage of preventing miswork in which the anchoring part moves outward from the bore hole part during the tensioning process of the reinforcement member.

[0032] The slope reinforcement method according to the present invention and the retaining wall constructed using the same have the advantage that a first plug and a second plug are installed at one end and the other end of the anchoring body to provide a sealed space inside the anchoring part, so that even if grout material is filled between the anchoring part and the drilled hole part, the grout material cannot flow into the anchoring part, allowing the reinforcing member to be installed slidingly inside the anchoring part and the elastic member installed on the reinforcing member to be installed so as to be compressible or expandable.

[0033] The slope reinforcement method according to the present invention and the retaining wall constructed using the same have the advantage that a first plug and a second plug are detachably installed on a mounting body with both ends open to form a fixing part, so that when a reinforcing member is inserted and installed so as to slide into the fixing part, the first plug or the second plug can be easily opened and closed, and the tension providing part can be easily installed inside the fixing part while opening and closing the first plug or the second plug.

[0034] The slope reinforcement method according to the present invention and the retaining wall constructed using the same are equipped with an injection section capable of injecting grout material along the reinforcing member to the inner end of the bore hole section, so that the grout material can be effectively filled into the gap between the anchoring section and the bore hole section, and there is an advantage of preventing interference between the grout material and the reinforcing member while the reinforcing member is being pulled out while the injection of the grout material proceeds in stages.

[0035] The slope reinforcement method according to the present invention and the retaining wall constructed using the same have the advantage of being able to construct the retaining wall panel supported by the reinforcement member by connecting the reinforcement member extending outward from the drilled hole and the retaining wall panel, thereby allowing the reinforcement member to be easily connected to the retaining wall panel constructed at various angles by additionally installing a connecting rod and a connecting member that connect the reinforcement member and the retaining wall panel.

[0036] The slope reinforcement method according to the present invention and the retaining wall constructed using the same are equipped with a corrosion prevention part that prevents rainwater and groundwater from coming into contact with the connection part between the retaining wall panel and the reinforcing member, so that the reinforcing member, connecting member, and connecting member made of metal material can be prevented from coming into contact with rainwater or groundwater and thus have the advantage of extending the lifespan of the retaining wall.

[0037] The slope reinforcement method according to the present invention and the retaining wall constructed using the same include a rapid-setting agent that increases the hardening speed of the grout material injected into the bore hole, so the hardening speed of the grout material filled between the anchorage part and the bore hole part can be improved, which has the advantage of reducing the time and cost required for the construction of the reinforcement member.

[0038] The slope reinforcement method according to the present invention and the retaining wall constructed using the same have the advantage that the injection process of filling the drilled hole with grout material can be carried out in stages, so if the anchoring part and the drilled hole part are constructed as a single unit first and then the pulling process of the reinforcing member is carried out, the reinforcing member protruding from the anchoring part can be prevented from interfering with the grout material. Brief explanation of the drawing

[0039] FIG. 1 is a drawing illustrating the drilling, insertion, and filling steps of a slope reinforcement method according to one embodiment of the present invention. FIG. 2 is a drawing illustrating the pulling step, connecting step, and finishing step of a slope reinforcement method according to one embodiment of the present invention. FIG. 3 is a perspective view showing the anchoring portion of a retaining wall constructed by a slope reinforcement method according to one embodiment of the present invention. FIG. 4 is an exploded perspective view showing the anchoring part and the tension providing part of a retaining wall constructed by a slope reinforcement method according to one embodiment of the present invention. FIG. 5 is a cross-sectional view showing the anchoring part and the tension providing part of a retaining wall constructed by a slope reinforcement method according to one embodiment of the present invention. FIG. 6 is an operational diagram showing the pull-out state of the anchorage part of a retaining wall constructed by a slope reinforcement method according to one embodiment of the present invention. FIG. 7 is an operational state diagram showing the restoration state of the anchorage portion of a retaining wall constructed by a slope reinforcement method according to one embodiment of the present invention. FIG. 8 is a photograph showing the anchoring and injection portions of a retaining wall constructed by a slope reinforcement method according to one embodiment of the present invention. FIG. 9 is a photograph showing the exterior panel and connecting finishing part of a retaining wall constructed by a slope reinforcement method according to one embodiment of the present invention. FIG. 10 is a photograph of a retaining wall constructed by a slope reinforcement method according to one embodiment of the present invention. FIG. 11 is a photograph of the connecting end of a retaining wall constructed by a slope reinforcement method according to another embodiment of the present invention. FIG. 12 is a photograph showing the connecting finishing part and the corrosion prevention part of a retaining wall constructed by a slope reinforcement method according to another embodiment of the present invention. Specific details for implementing the invention

[0040] Hereinafter, an embodiment of a slope reinforcement method according to the present invention and a retaining wall constructed using the same will be described with reference to the attached drawings.

[0041] In this process, the thickness of the lines or the size of the components shown in the drawings may be exaggerated for the sake of clarity and convenience of explanation.

[0042] In addition, the terms described below are defined considering their functions in the present invention, and these may vary depending on the intention or practice of the user or operator.

[0043] Therefore, the definitions of these terms should be based on the content throughout this specification.

[0044] FIG. 1 is a drawing illustrating the drilling, insertion, and filling steps of a slope reinforcement method according to one embodiment of the present invention, FIG. 2 is a drawing illustrating the pulling, connecting, and finishing steps of a slope reinforcement method according to one embodiment of the present invention, and FIG. 3 is a perspective view illustrating the anchoring part of a retaining wall constructed by the slope reinforcement method according to one embodiment of the present invention.

[0045] FIG. 4 is an exploded perspective view showing the anchoring part and tension providing part of a retaining wall constructed by a slope reinforcement method according to one embodiment of the present invention, FIG. 5 is a cross-sectional view showing the anchoring part and tension providing part of a retaining wall constructed by a slope reinforcement method according to one embodiment of the present invention, and FIG. 6 is an operational state diagram showing the pull-out state of the anchoring part of a retaining wall constructed by a slope reinforcement method according to one embodiment of the present invention.

[0046] FIG. 7 is an operational state diagram showing the restoration state of the anchorage part of a retaining wall constructed by a slope reinforcement method according to one embodiment of the present invention, FIG. 8 is a photograph showing the anchorage part and injection part of a retaining wall constructed by a slope reinforcement method according to one embodiment of the present invention, FIG. 9 is a photograph showing the exterior panel and connection finishing part of a retaining wall constructed by a slope reinforcement method according to one embodiment of the present invention, and FIG. 10 is a photograph showing a retaining wall constructed by a slope reinforcement method according to one embodiment of the present invention.

[0047] Referring to FIGS. 1 to 10, a slope reinforcement method according to one embodiment of the present invention comprises the steps of: constructing a drilling hole portion (10) on a slope; connecting a fixing portion (30) to a reinforcing member (14) having a tension providing portion (50) and inserting it into the drilling hole portion (10); filling the drilling hole portion (10) with grout material (16) to form the fixing portion (30) integrally on the slope; tensioning the reinforcing member (14) outward from the drilling hole portion (10) to fix it on the slope; constructing a retaining wall panel (92) adjacent to the slope and connecting the reinforcing member (14) and the retaining wall panel (92); pouring backfill material (97) between the retaining wall panel (92) and the slope and finishing the outer wall of the retaining wall panel (92).

[0048] Here, in the tensioning step of the present embodiment, when the reinforcing member (14) is tensioned, the tension providing part (50) is compressed and the reinforcing member (14) protrudes from the fixing part (30), and when the tensioning step is finished, the tension providing part (50) that was compressed is restored to its original state, thereby providing tension that pulls the reinforcing member (14) into the inside of the drilling hole part (10) by means of elastic force.

[0049] Therefore, a pressing force is provided by the pressure plate (12) installed on the outer side of the reinforcing member (14) to press the slope inward toward the drilled hole (10), thereby providing the effect of continuously compacting the slope.

[0050] As described above, when multiple reinforcing members (14) are installed on the slope, the effect of compacting the entire slope inward toward the drilled hole (10) can be provided, thereby improving the stability of the entire slope.

[0051] The fixing part (30) of the present embodiment includes a fixing body (32) into which a reinforcing member (14) is slidably inserted, a first plug (34) installed at one end of the fixing body (32) into which a reinforcing member (14) is slidably inserted, and a second plug (37) installed at the other end of the fixing body (32) into which a reinforcing member (14) is slidably inserted.

[0052] The fixing body (32) is formed in the shape of a pipe with both ends open, with a first screw thread (32a) formed at one end and a second screw thread (32b) formed at the other end, so that a first plug (34) and a second plug (37) are detachably installed at both ends.

[0053] A hole is formed in the central part of the first plug (34) and the second plug (37) into which the reinforcing member (14) is slidably inserted, so that the end of the reinforcing member (14) can be slidably inserted into the space formed by the fixing body (32), the first plug (34), and the second plug (37).

[0054] Since the fixing body (32) is provided with a plurality of fixing ribs (32c) that are formed integrally by being impregnated with grout material (16), when the fixing part (30) into which the reinforcing member (14) is inserted is inserted to the inner end of the drilling hole part (10) and the grout material (16) is injected into the drilling hole part (10) along the injection part (70), the grout material (16) fills the gap between the fixing part (30) and the drilling hole part (10), and the fixing ribs (32c) are impregnated into the grout material (16).

[0055] Therefore, when the grout material (16) hardens and is installed integrally in the drilled hole (10), the anchoring rib (32c) impregnated in the hardened grout material (16) is engaged with the hardened grout material (16), thereby enabling the anchoring part (30) to be integrally connected to the inner end of the drilled hole (10).

[0056] In addition, the first stopper (34) of the present embodiment is provided with a plurality of first ribs (36) that are formed integrally by being impregnated in the grout material (16), and the second stopper (37) is provided with a plurality of second ribs (38) that are formed integrally by being impregnated in the grout material (16). Therefore, the fixing rib (32c), the first rib (36), and the second rib (38) are maintained in a state where they are simultaneously impregnated in the hardened grout material (16), thereby effectively preventing the fixing portion (30) from being lost to the outside of the drilled hole portion (10).

[0057] As described above, a fixing part (30) is inserted into the inner end of the drilling hole part (10), and after the grout material (16) is injected into the gap between the fixing part (30) and the drilling hole part (10) and hardened, a tensioning process is performed to pull the reinforcing member (14) outward from the drilling hole part (10). As a result, the tension providing part (50) provided in the mounting part is compressed, causing the reinforcing member (14) to protrude outward from the fixing part (30) and the drilling hole part (10), and the reinforcing member (14) is fixed to the pressure plate (12) installed at the entrance of the drilling hole part (10), thereby maintaining the state in which the reinforcing member (14) is tensioned.

[0058] After the reinforcing member (14) is fixed to the slope by the pressure plate (12), the tension providing part (50) that was compressed provides tension that pulls the reinforcing member (14) inwardly toward the drilling hole (10) by the elastic force that expands inwardly toward the drilling hole (10), so the pressure plate (12) can provide pressure that compacts the slope inwardly toward the drilling hole (10).

[0059] The tension providing part (50) of the present embodiment is installed in the fixing part (30) and includes a movable block (52) into which a reinforcing member (14) is slidably inserted, a fixed part (54) which is fixedly installed in the reinforcing member (14) and connected to the movable block (52), and an elastic member (59) which is installed in the reinforcing member (14) so ​​as to be interposed between the movable block (52) and the fixing part (30).

[0060] Additionally, the fixing part (54) of the present embodiment includes a plurality of wedge members (56) installed in close contact with a reinforcing member (14), a coupling ring (57) that simultaneously wraps the plurality of wedge members (56) to close the plurality of wedge members (56) with the reinforcing member (14), and a fastening block (58) that simultaneously accommodates the plurality of wedge members (56) and is fastened to a movable block (52).

[0061] Accordingly, a plurality of wedge members (56) are installed in close contact with the inner end of the reinforcing member (14) of the present embodiment by means of a coupling ring (57) and a fastening block (58), and the fastening block (58) and the movable block (52) are coupled to each other so that the movable block (52) and the fixing part (54) are coupled to the inner end of the reinforcing member (14).

[0062] As described above, since an elastic member (59) is interposed between the movable block (52) fixed to the reinforcing member (14) and the inner wall of the fixing part (30), the movable block (52) and the reinforcing member (14) are pressed inwardly by the elastic force provided by the elastic member (59).

[0063] Accordingly, after inserting the anchoring part (30) into the drilling hole part (10) and injecting the grout material (16) into the drilling hole part (10) to cure it, when the reinforcing member (14) is tensioned to the outside of the drilling hole part (10), the elastic member (59) is compressed and the reinforcing member (14) protrudes outward from the drilling hole part (10) by the distance of the moving block (52). When the outer end of the reinforcing member (14) is connected to the pressure plate (12) and placed on the slope, the elastic member (59) provides an elastic force to expand back to its original state, thereby providing tension that pulls the reinforcing member (14) and the pressure plate (12) inward from the drilling hole part (10).

[0064] This embodiment further includes an injection section (70) that supplies and fills a grout material (16) into a drilled hole section (10) along a reinforcing member (14), and a connecting finishing section (80) that connects a reinforcing member (14) extending outward from the drilled hole section (10) and a retaining wall panel (92).

[0065] The injection section (70) of the present embodiment is inserted into the drilled hole section (10) along the reinforcing member (14) and includes an injection pipe (72) through which grout material (16) is supplied, a fixing member (74) that restrains the injection pipe (72) and connects to the reinforcing member (14), and a seating member (76) that is installed on the reinforcing member (14) to maintain a distance from the reinforcing member (14) and supports the injection pipe (72).

[0066] In this embodiment, one or more injection pipes (72) may be installed, and if multiple injection pipes (72) are installed, the lengths of each injection pipe (72) may be different from each other. A grout material (16) containing a quick-setting agent is supplied to the injection pipe (72) inserted to the inner end of the drilled hole (10), thereby enabling the anchoring part (30) and the drilled hole (10) to be connected integrally in a short period of time.

[0067] The mounting member (76) of the present embodiment is formed in the shape of a disc into which the reinforcing member (14) is inserted, and since a plurality of grooves are formed on the edge of the disc-shaped mounting member (76), when a plurality of injection pipes (72) are installed, the plurality of injection pipes (72) are each mounted in different grooves, thereby preventing the plurality of injection pipes (72) from getting tangled with each other.

[0068] The grout material (16) supplied along the injection pipe (72) of this embodiment comprises 27 to 69 parts by weight of cement, 3 to 20 parts by weight of blast furnace slag powder, 5 to 30 parts by weight of aggregate, 2 to 8 parts by weight of aluminum hydroxide, 5 to 14 parts by weight of quick-setting agent, 0.5 to 2.5 parts by weight of aluminum sulfate, 0.1 to 1 part by weight of activated alumina gel, 1 to 2 parts by weight of graphene oxide, 1 to 2 parts by weight of methylcellulose, 0.1 to 0.8 parts by weight of sodium polyacrylate, 1 to 1.5 parts by weight of maleic anhydride, 2 to 5 parts by weight of plagioclase, 0.1 to 0.5 parts by weight of melamine sulfonate, 0.1 to 0.9 parts by weight of zinc oxide, 0.5 to 1.5 parts by weight of methylene diphenyl diisocyanate, and glass fiber. It comprises 0.1 to 0.4 parts by weight, 0.5 to 3 parts by weight of nickel slag powder, 1 to 4 parts by weight of atapulgite, 0.01 to 0.1 parts by weight of trimethylolpropane triglycidyl ether, 0.1 to 1.5 parts by weight of vinyl acetate ethylene copolymer powder resin, 0.01 to 0.1 parts by weight of gluconic acid, and 0.01 to 0.1 parts by weight of tetrahydrofurfuryl methacrylate.

[0069] In addition, the rapid-setting agent of the present embodiment comprises 66 to 90 parts by weight of a CA-based rapid-setting agent and 10 to 34 parts by weight of gypsum fine powder, wherein the CA-based rapid-setting agent comprises 38 to 49 parts by weight of CaO, 23 to 40 parts by weight of Al2O3, 29 parts by weight of SO3, 3 to 6 parts by weight of SiO2, 1.6 to 3 parts by weight of MgO, and 1.2 to 2 parts by weight of Fe2O3, and the fineness of the cement is 6,500 to 8,000 cm⁻¹. 2 It consists of / g.

[0070] The graphene oxide of this embodiment has an average particle size of 0.5 to 5 μm and a specific surface area of ​​300 to 700 m² / g, and is introduced in the form of a water-soluble dispersion at a weight of 0.05 to 0.3 parts by weight relative to cement based on solid content, and acts as a nucleation site for the CASH gel during the hydration reaction.

[0071] The rapid setting agent of this embodiment can have its reaction rate controlled stepwise by controlling the order of addition of gluconic acid and aluminum sulfate so that the initial setting time after mixing is 2 to 6 minutes, the compressive strength is 3.5 MPa or more after 20 minutes, and the compressive strength is 18 MPa or more after 24 hours. In this specification, '1 to 2 parts by weight of graphene oxide' included in the total composition of the grout material refers to the 'total weight of addition in the state of a water-soluble dispersion' in which graphene oxide is dispersed, and it is clarified that the content of substantial pure graphene oxide solids, excluding the solvent, is included in a ratio of 0.05 to 0.3 parts by weight relative to the weight of the cement.

[0072] Example 1

[0073] 45 parts by weight of cement, 12 parts by weight of blast furnace slag powder, 15 parts by weight of aggregate, 5 parts by weight of sodium hydroxide, 10 parts by weight of quick-setting agent, 1.2 parts by weight of aluminum sulfate, 0.5 parts by weight of activated alumina gel, 1.0 parts by weight of graphene oxide, 1 part by weight of methylcellulose, 0.5 parts by weight of sodium polyacrylate, 1 part by weight of maleic anhydride, 1.65 parts by weight of plagioclase, 0.3 parts by weight of melamine sulfonate, 0.5 parts by weight of zinc oxide, 1 part by weight of methylene diphenyl diisocyanate, 0.2 parts by weight of glass fiber, 1.5 parts by weight of nickel slag powder, 1.5 parts by weight of attapulgite, 0.05 parts by weight of trimethylolpropane triglycidyl ether, 1 part by weight of vinyl acetate ethylene copolymer powder resin, 0.05 parts by weight of gluconic acid, It is prepared by including 0.05 parts by weight of tetrahydrofurfuryl methacrylate.

[0074] Example 2

[0075] 43 parts by weight of cement, 13 parts by weight of blast furnace slag powder, 14 parts by weight of aggregate, 5 parts by weight of sodium hydroxide, 10 parts by weight of quick-setting agent, 1.0 parts by weight of aluminum sulfate, 0.6 parts by weight of activated alumina gel, 1.5 parts by weight of graphene oxide, 1 part by weight of methylcellulose, 0.5 parts by weight of sodium polyacrylate, 1 part by weight of maleic anhydride, 1.65 parts by weight of plagioclase, 0.3 parts by weight of melamine sulfonate, 0.5 parts by weight of zinc oxide, 1 part by weight of methylene diphenyl diisocyanate, 0.2 parts by weight of glass fiber, 1.5 parts by weight of nickel slag powder, 1.5 parts by weight of attapulgite, 0.05 parts by weight of trimethylolpropane triglycidyl ether, 1 part by weight of vinyl acetate ethylene copolymer powder resin, 0.05 parts by weight of gluconic acid, It is prepared by including 0.05 parts by weight of tetrahydrofurfuryl methacrylate.

[0076] Example 3

[0077] 42 parts by weight of cement, 14 parts by weight of blast furnace slag powder, 13 parts by weight of aggregate, 5 parts by weight of sodium hydroxide, 10 parts by weight of quick-setting agent, 0.9 parts by weight of aluminum sulfate, 0.6 parts by weight of activated alumina gel, 2.0 parts by weight of graphene oxide, 1 part by weight of methylcellulose, 0.5 parts by weight of sodium polyacrylate, 1 part by weight of maleic anhydride, 1.65 parts by weight of plagioclase, 0.3 parts by weight of melamine sulfonate, 0.5 parts by weight of zinc oxide, 1 part by weight of methylene diphenyl diisocyanate, 0.2 parts by weight of glass fiber, 1.5 parts by weight of nickel slag powder, 1.5 parts by weight of attapulgite, 0.05 parts by weight of trimethylolpropane triglycidyl ether, 1 part by weight of vinyl acetate ethylene copolymer powder resin, 0.05 parts by weight of gluconic acid, It is prepared by including 0.05 parts by weight of tetrahydrofurfuryl methacrylate.

[0078] Comparative Example 2

[0079] 43 parts by weight of cement, 13 parts by weight of blast furnace slag powder, 14 parts by weight of aggregate, 5 parts by weight of sodium hydroxide, 10 parts by weight of quick-setting agent, 1.0 parts by weight of aluminum sulfate, 0.6 parts by weight of activated alumina gel, 1 part by weight of methylcellulose, 0.5 parts by weight of sodium polyacrylate, 1 part by weight of maleic anhydride, 1.65 parts by weight of plagioclase, 0.3 parts by weight of melamine sulfonate, 0.5 parts by weight of zinc oxide, 1 part by weight of methylene diphenyl diisocyanate, 0.2 parts by weight of glass fiber, 1.5 parts by weight of nickel slag powder, 1.5 parts by weight of attapulgite, 0.05 parts by weight of trimethylolpropane triglycidyl ether, 1 part by weight of vinyl acetate ethylene copolymer powder resin, 0.05 parts by weight of gluconic acid, tetrahydrofurfuryl methacrylate It is manufactured by including 0.05 parts by weight.

[0080] Comparative Example 2

[0081] 43 parts by weight of cement, 13 parts by weight of blast furnace slag powder, 14 parts by weight of aggregate, 5 parts by weight of sodium hydroxide, 10 parts by weight of quick-setting agent, 1.0 parts by weight of aluminum sulfate, 0.6 parts by weight of activated alumina gel, 2.5 parts by weight of graphene oxide, 1 part by weight of methylcellulose, 0.5 parts by weight of sodium polyacrylate, 1 part by weight of maleic anhydride, 1.65 parts by weight of plagioclase, 0.3 parts by weight of melamine sulfonate, 0.5 parts by weight of zinc oxide, 1 part by weight of methylene diphenyl diisocyanate, 0.2 parts by weight of glass fiber, 1.5 parts by weight of nickel slag powder, 1.5 parts by weight of attapulgite, 0.05 parts by weight of trimethylolpropane triglycidyl ether, 1 part by weight of vinyl acetate ethylene copolymer powder resin, 0.05 parts by weight of gluconic acid, It is prepared by including 0.05 parts by weight of tetrahydrofurfuryl methacrylate.

[0082] As described above, in Example 1, it was confirmed that graphene oxide acts as a nucleation site for the CASH gel, resulting in a 24-hour compressive strength of 18.6 MPa, a slope adhesion strength of 1.45 MPa, and an effect of inhibiting the occurrence of microcracks. It was also proven that the effect can be achieved even with only 1 weight part of graphene oxide, thereby allowing the lower limit of the graphene oxide content to be determined.

[0083] In Example 2, the stabilization of the hydration reaction rate was maintained, with a 24-hour compressive strength of 21.2 MPa and a permeability coefficient of 1.2 × 10⁻⁶. -8 With a strength reduction rate of 6% after 300 freeze-thaw cycles at cm / s, the balance of mechanical strength, durability, and water resistance was measured to be the best.

[0084] In Example 3, the micropore filling effect was maximized and a 24-hour compressive strength of 22.0 MPa was maintained, but the sprayability was slightly reduced compared to Example 2 due to increased viscosity, so it was found that the upper limit of the graphene oxide content is 2 parts by weight.

[0085] Comparative Example 1 had a 4-hour compressive strength of 15.3 MPa, numerous microcracks occurred after hardening, and an increase in permeability coefficient of 4.8 × 10⁻⁶ -8 It was measured in cm / s, and it can be seen that the effect of graphene oxide addition was clearly absent.

[0086] In Comparative Example 2, the viscosity of the mixture increased rapidly (exceeding 15,000 cP), spray nozzle clogging occurred, strength variation occurred due to local aggregation, and the 24-hour compressive strength did not increase to 21.0 MPa, so it was found that when graphene oxide was added in excess of 2.0 parts by weight, workability and homogeneity actually decreased.

[0087] As mentioned above, when graphene oxide is less than 1 weight part, the effect is insufficient, and when graphene oxide is included in an amount of 1 to 2 weight parts, strength, durability, and workability are simultaneously secured, and when graphene oxide is included in an amount exceeding 2 weight parts, it can be seen that problems arise in which the viscosity and dispersibility of the grite material decrease.

[0088] Therefore, it can be seen that the graphene oxide content in the grout material of this embodiment is 1 to 2 parts by weight, which is not an arbitrary value but a technical critical range.

[0089] The connection finishing portion (80) of the present embodiment includes a back panel (82) installed on the retaining wall panel (92) to restrain a reinforcing member (14) passing through the through hole portion (94) of the retaining wall panel (92), a front panel (84) installed on the retaining wall panel (92) to restrain a reinforcing member (14) passing through the through hole portion (94) of the retaining wall panel (92), and a fastening member (86) that is fastened to the reinforcing member (14) passing through the retaining wall panel (92) and seated on the front panel (84).

[0090] Accordingly, the reinforcing member (14) protruding outside the perforated hole portion (10) passes through the through hole portion (94) of the retaining wall panel (92) and is connected to the retaining wall panel (92) by the fastening member (86) which is seated on the front panel (84), and the back panel (82) and nut member are installed on the back surface of the retaining wall panel (92) to connect the retaining wall panel (92) and the outer end of the reinforcing member (14).

[0091] As described above, after connecting the retaining wall panel (92) and the reinforcing member (14), backfill material (97) is poured into the gap between the slope and the retaining wall panel (92) and a compaction process is carried out so that the slope is firmly supported by the backfill material (97) and the retaining wall panel (92), and by continuously carrying out the retaining wall construction as described above, a retaining wall in which the retaining wall panels (92) are stacked in multiple layers can be constructed.

[0092] In addition, a plurality of exterior panels (96) are installed on the front of the retaining wall panel (92) of the present embodiment to provide a beautiful finish to the exterior of the retaining wall, and after the end of the reinforcing member (14) is fixed to the through hole (94) by the connecting finishing part (80), a finishing panel (98) covering the through hole (94) is installed to prevent the connecting finishing part (80) from being exposed to the outside of the retaining wall.

[0093] At this time, the finishing panel (98) of the present embodiment is formed in the same or similar shape as the exterior panel (96) installed on the front of the retaining wall panel (92), so that the front of the retaining wall panel (92) on which the finishing panel (98) is installed can be beautifully finished by the exterior panel (96) and the finishing panel (98).

[0094] FIG. 11 is a photograph of the connection finishing part of a retaining wall constructed by a slope reinforcement method according to another embodiment of the present invention, and FIG. 12 is a photograph of the connection finishing part and the corrosion prevention part of a retaining wall constructed by a slope reinforcement method according to another embodiment of the present invention.

[0095] Referring to FIGS. 11 and 12, the connecting finishing portion of a retaining wall constructed using a slope reinforcement method according to another embodiment of the present invention further includes a connecting member (87) installed at the outer end of a reinforcing member (14) and a connecting member (88) installed between the connecting member (87) and a retaining wall panel (92).

[0096] If the length of the reinforcing member (14) extending outward from the perforated hole (10) is short, or if the extension direction of the reinforcing member (14) and the position of the through hole (94) of the retaining wall panel (92) are separated by more than a set value, the reinforcing member (14) and the retaining wall panel (92) can be connected by connecting the connecting member (88) and the connecting member (88) after connecting the connecting finishing member (80) installed on the retaining wall panel (92).

[0097] In addition, this embodiment further includes a corrosion-preventing part (99) that wraps around the retaining wall panel (92) or the connecting part (80) to prevent rainwater or groundwater from coming into contact with the retaining wall panel (92) or the connecting part (80).

[0098] Since the reinforcing member (14), connecting member (88), connecting member (87), and connecting finishing member (80) exposed in the gap between the slope and the retaining wall panel (92) are formed of a metal material, rainwater or groundwater seeping along the backfill material (97) may come into contact with the reinforcing member (14), connecting member (88), connecting member (87), or connecting finishing member (80). In this embodiment, a sheet-shaped corrosion-preventing part (99) covering the upper and rear surfaces of the retaining wall panel (92), the reinforcing member (14), connecting member (88), connecting member (87), and connecting finishing member (80) is applied, thereby preventing the retaining wall panel (92), reinforcing member (14), connecting member (88), connecting member (87), and connecting finishing member (80) from coming into direct contact with rainwater or groundwater.

[0099] As described above, the corrosion prevention part (99) that is laid can be made of a fibrous material such as non-woven fabric, and can include a waterproof sheet or a fiber sheet, so that the retaining wall panel (92), reinforcing member (14), connecting member (88), connecting member (87) or connecting finishing part (80) can be prevented from being corroded by rainwater or groundwater seeping along the backfill material (97).

[0100] In addition, when a corrosion-preventing member (99) is applied to a first-floor retaining wall panel (92) installed close to the ground and a backfill material (97) is laid on the upper surface of the corrosion-preventing member (99) extending to the slope, the corrosion-preventing member (99) extending from the upper surface of the retaining wall panel (92) can function as a reinforcing sheet that pulls the upper surface of the retaining wall panel (92) backward.

[0101] Thus, a slope reinforcement method that improves the supporting force of a retaining wall panel by providing a fixing part at the inner end of a reinforcing member inserted into a bore hole, providing a supporting force that supports a retaining wall panel connected to the outer end of the reinforcing member, and a tension providing part that provides a tension that pulls the reinforcing member into the bore hole, and a retaining wall constructed using the same can be provided.

[0102] Although the present invention has been described with reference to an embodiment illustrated in the drawings, this is merely illustrative, and those skilled in the art will understand that various modifications and equivalent alternative embodiments are possible therefrom.

[0103] In addition, although the slope reinforcement method and the retaining wall constructed using it have been described as examples, this is merely illustrative, and the reinforcement method of the present invention and the retaining wall constructed using it can be used in other products other than the slope reinforcement method and the retaining wall constructed using it.

[0104] Therefore, the true technical scope of protection of the present invention should be determined by the following patent claims. Explanation of the symbols

[0105] 10: Perforation hole section 12: Pressure plate 14: Reinforcing member 16: Grout material 30 : Fixing part 32 : Fixing main body 32a: First thread 32b: Second thread 32c : Fixing rib 34 : First plug 36 : 1st rib 37 : 2nd stopper 38 : 2nd rib 50 : Tension providing part 52 : Movable block 54 : Fixed part 56 : Wedge member 57 : Joining ring 58 : Fastening block 59 : Elastic member 70 : Injection part 72 : Injection tube 74 : Fixing member 76 : Seating member 80 : Connection finish 82 : Rear panel 84 : Front panel 86 : Fastening member 87 : Connecting member 88 : Connecting rod 90 : Foundation block 92 : Retaining wall panel 94 : Through-hole section 96 : Exterior panel 97 : Backfill material 98 : Finishing panel 99 : Corrosion prevention section

Claims

Claim 1 (a) a step of constructing a perforated hole portion on the slope; (b) a step of connecting a fixing portion to a reinforcing member equipped with a tension providing portion and inserting it into the perforated hole portion; (c) a step of filling the perforated hole portion with grout material to integrally form the fixing portion on the slope; (d) a step of tensioning the reinforcing member outward from the perforated hole portion to fix it to the slope; (e) a step of constructing a retaining wall panel adjacent to the slope and connecting the reinforcing member and the retaining wall panel; and (f) a step of pouring backfill material between the retaining wall panel and the slope and finishing the outer wall of the retaining wall panel, wherein the fixing portion comprises: a fixing body formed in the shape of a pipe with both ends open; and a first plug installed at one end of the fixing body and into which the reinforcing member is slidably inserted. and a second plug installed at the other end of the fixed body and into which the reinforcing member is slidably inserted to provide a sealed space inside, wherein the tension providing part is provided inside the sealed space, and the tension providing part comprises: a movable block installed inside the fixed part and into which the reinforcing member is slidably inserted; and a fixed part installed to be fixed to the reinforcing member and connected to the movable block. The apparatus comprises an elastic member installed on the reinforcing member so as to be interposed between the movable block and the anchoring part, and the grout material filled in the drilled hole in step (c) comprises 27 to 69 parts by weight of cement, 3 to 20 parts by weight of blast furnace slag powder, 5 to 30 parts by weight of aggregate, 2 to 8 parts by weight of aluminum hydroxide, 5 to 14 parts by weight of quick-setting agent, 0.5 to 2.5 parts by weight of aluminum sulfate, 0.1 to 1 part by weight of activated alumina gel, 1 to 2 parts by weight of graphene oxide, 1 to 2 parts by weight of methylcellulose, 0.1 to 0.8 parts by weight of sodium polyacrylate, 1 to 1.5 parts by weight of maleic anhydride, 2 to 5 parts by weight of plagioclase, 0.1 to 0.5 parts by weight of melamine sulfonate, 0.1 to 0.9 parts by weight of zinc oxide, and methylene 0.5 to 1.5 parts by weight of diphenyl diisocyanate, 0.1 to 0.4 parts by weight of glass fiber, 0.1 parts by weight of nickel slag powder.It comprises 5 to 3 parts by weight, 1 to 4 parts by weight of attapulgite, 0.01 to 0.1 parts by weight of trimethylolpropane triglycidyl ether, 0.1 to 1.5 parts by weight of vinyl acetate ethylene copolymer powder resin, 0.01 to 0.1 parts by weight of gluconic acid, and 0.01 to 0.1 parts by weight of tetrahydrofurfuryl methacrylate, wherein the graphene oxide has an average particle size of 0.5 to 5 μm and a specific surface area of ​​300 to 700 m² / g, and is added in an amount of 0.05 to 0.3 parts by weight relative to the cement based on solid content, wherein when step (c) is performed, the grout material is prevented from flowing into the sealed space by the first and second plugs, and when the reinforcing member is tensioned in step (d), the tension providing part is compressed and the reinforcing member protrudes from the anchoring part, and step (d) A slope reinforcement method characterized by providing tension that pulls the reinforcing member into the drilled hole portion by means of an elastic force that restores the compressed tension providing portion to its original state when terminated. Claim 2 A reinforcing member inserted into a bore hole formed in a slope; a fixing part integrally formed in the slope by a grout material filled in the bore hole and to which the reinforcing member is connected; a retaining wall panel constructed adjacent to the slope and connected to the reinforcing member; and a backfill material poured between the retaining wall panel and the slope, wherein the fixing part comprises: a fixing body formed in the shape of a pipe with both ends open; a first plug installed at one end of the fixing body and into which the reinforcing member is slidably inserted; and a second plug installed at the other end of the fixing body and into which the reinforcing member is slidably inserted, thereby providing a sealed space inside, wherein a tension providing part is provided inside the sealed space of the fixing part, and the tension providing part comprises: a movable block installed inside the fixing part and into which the reinforcing member is slidably inserted; and a fixing part installed to be fixed to the reinforcing member and connected to the movable block. The apparatus comprises an elastic member installed on the reinforcing member so as to be interposed between the movable block and the anchoring part, and the grout material filled in the drilled hole comprises 27 to 69 parts by weight of cement, 3 to 20 parts by weight of blast furnace slag powder, 5 to 30 parts by weight of aggregate, 2 to 8 parts by weight of aluminum hydroxide, 5 to 14 parts by weight of quick-setting agent, 0.5 to 2.5 parts by weight of aluminum sulfate, 0.1 to 1 part by weight of activated alumina gel, 1 to 2 parts by weight of graphene oxide, 1 to 2 parts by weight of methylcellulose, 0.1 to 0.8 parts by weight of sodium polyacrylate, 1 to 1.5 parts by weight of maleic anhydride, 2 to 5 parts by weight of plagioclase, 0.1 to 0.5 parts by weight of melamine sulfonate, 0.1 to 0.9 parts by weight of zinc oxide, and methylene diphenyl diisocyanate. 0.5 to 1.5 parts by weight, glass fiber 0.1 to 0.4 parts by weight, nickel slag powder 0.5 to 3 parts by weight, atapulgite 1 to 4 parts by weight, trimethylolpropane triglycidyl ether 0.01 to 0.1 parts by weight, vinyl acetate ethylene copolymer powder resin 0.1 to 1.5 parts by weight, gluconic acid 0.01 to 0.1 parts by weight, tetrahydrofurfuryl methacrylate 0.A retaining wall comprising 0.1 to 0.1 parts by weight, wherein the graphene oxide has an average particle size of 0.5 to 5 μm and a specific surface area of ​​300 to 700 m² / g, and is introduced in an amount of 0.05 to 0.3 parts by weight relative to the cement based on solid content, wherein when the grout material is filled into the perforated hole, the grout material is prevented from flowing into the sealed space by the first and second plugs, and wherein, while the reinforcing member is tensioned and fixed to the retaining wall panel, the elastic member of the tension providing part maintains a compressed state, thereby continuously providing tension that pulls the reinforcing member inward toward the perforated hole by the restoring force of the elastic member. Claim 3 delete Claim 4 A retaining wall according to paragraph 2, characterized in that the anchoring body is provided with a plurality of anchoring ribs that are integrally formed by being impregnated with the grout material. Claim 5 A retaining wall according to claim 2, characterized in that the first plug is provided with a plurality of first ribs formed integrally by being impregnated with the grout material, and the second plug is provided with a plurality of second ribs formed integrally by being impregnated with the grout material. Claim 6 delete Claim 7 A retaining wall according to claim 2, wherein the fixing member comprises: a plurality of wedge members installed in close contact with the reinforcing member; a coupling ring that simultaneously surrounds the plurality of wedge members to bring the plurality of wedge members into close contact with the reinforcing member; and a fastening block that simultaneously accommodates the plurality of wedge members and is fastened to the movable block. Claim 8 A retaining wall according to claim 2, further comprising: an injection section for supplying and filling the grout material into the bore hole along the reinforcing member; and a connecting finishing section connecting the reinforcing member and the retaining wall panel extending outward from the bore hole. Claim 9 A retaining wall according to claim 8, wherein the injection portion comprises: an injection pipe inserted into the interior of the bore hole portion along the reinforcing member and through which the grout material is supplied; a fixing member connected to the reinforcing member by restraining the injection pipe; and a seating member installed on the reinforcing member to maintain a distance from the reinforcing member and on which the injection pipe rests. Claim 10 In claim 8, the connecting finishing portion comprises: a back panel installed on the retaining wall panel to restrain the reinforcing member passing through the through hole of the retaining wall panel; a front panel installed on the retaining wall panel to restrain the reinforcing member passing through the through hole of the retaining wall panel; and a fastening member fastened to the reinforcing member passing through the retaining wall panel and seated on the front panel. Claim 11 A retaining wall according to claim 10, further comprising a corrosion-preventing member that surrounds the retaining wall panel or the connecting finishing member to prevent rainwater or groundwater from coming into contact with the retaining wall panel or the connecting finishing member.

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