JP2009249879A - Anchoring hardware, slope stabilization structure using the anchoring hardware, and slope stabilization method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide anchoring hardware manufacturable at low cost, capable of preventing the appearance of a slope reaction body from being degraded, and prevented from being damaged due to the contact thereof on the other object, a slope stabilization structure, and a slope stabilization method. <P>SOLUTION: In this slope stabilization structure, a drilled hole 3 and an insertion hole 4 are so formed in a slope 1 and a frame for slope 2, respectively, as to communicate with each other, an anchor bolt 6 is buried in a grout 5 charged between the insertion hole 4 and the drilled hole 3, and the anchoring hardware 10 is fixed to the end of the anchor bolt 6 to anchor the frame 2 to the slope 1 with the anchoring hardware 10 interposed therebetween. The anchoring hardware 10 comprises a pressing plate 11 and a first tightening member 15. The first tightening member 15 comprises an annular seal section 16 having a partially convex seal surface 16a brought into contact with the mouth edge of a through-hole 12 formed in the pressing plate 11 from the upper side, a nut section 17 screwed with the anchor bolt 6 on the lower side of the pressing plate 11, and an operation section 18 for rotating the nut section 17. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a fixing hardware that can be suitably used to stabilize a slope by fixing a slope reaction body applied on a slope to the slope, and a slope stabilization structure and method using the same. It relates to the surface stabilization method.

  In order to stabilize the slope on slopes, slope construction methods are widely implemented, such as constructing a frame as a slope reaction body on the slope, or fixing a metal net on the slope. For example, when forming a frame on slopes, an insertion hole is formed at the intersection of the frame and a hole is formed in the slope by communicating with the insertion hole, and the insertion hole and the hole are filled with grout. After installation, anchor bolts are embedded in the grout across the insertion hole and drilling hole, and after the grout is hardened, the slope stabilization method is to fix the frame to the slope with the fixing hardware fixed to the end of the anchor bolt. Is widely adopted.

  The fixing metal is screwed into the holding plate installed on the frame, the spherical washer arranged on the holding plate, and the end of the anchor bolt protruding upward through the holding plate and the spherical washer. And a spherical nut and a protective cap that covers the spherical washer and the spherical nut are widely used (see, for example, Patent Document 1).

JP 2003-278153 A

  By the way, in the invention described in Patent Document 1, the protective cap prevents rainwater or the like from entering the threaded portion of the spherical nut and the anchor bolt, and prevents the threaded portion from rusting due to rainwater or the like. This protective cap is a comparatively large one having a diameter of 100 mm and a height of 150 mm, for example, and such a large protective cap is arranged in a protruding shape at the intersection of the vertical and horizontal frames of the legal frame. There is a problem that the appearance of the legal frame is lowered by the protective cap. In addition, when the fixing hardware described in Patent Document 1 is applied to the slope of the entire greening, there is a problem that the tip of the protective cap as an artificial foreign matter protrudes from the vegetation and the slope appearance is reduced. . Furthermore, if the protective cap protrudes outward as in the invention described in Patent Document 1, the automobile or pedestrian comes into contact with the protective cap on the road and the automobile is damaged or the pedestrian is injured. In addition, since the existing protective cap is made of an aluminum casting, the protective cap itself may be damaged by the contact. Furthermore, in the slope reaction body constructed for revetment, when the slope reaction body is immersed by water increase or the like, there is a problem that the drifting object hits the protection cap and the protection cap is damaged.

  The object of the present invention is to prevent rainwater and the like from entering the threaded portion of the anchor bolt and the fixing metal, thereby preventing the occurrence of rust in the threaded portion, and omitting the protective cap, thereby reducing the reaction force on the slope. Fixing hardware and slope stabilization structure that can reduce protrusions on slope reaction bodies such as bodies as much as possible to prevent deterioration of the appearance of slope reaction bodies and prevent damage due to contact with other objects And to provide a slope stabilization method.

  As a result of intensive studies on a slope stabilizing structure that can stably fix a slope reaction force body to a slope without using a protective cap, the main purpose of the protective cap is that a spherical nut and an anchor bolt are used. Focusing on preventing rainwater and the like from entering the threaded portion, if fixing hardware is screwed onto the anchor bolt below the presser plate, rainwater and the like can be prevented from entering the threaded portion. The idea that it can be prevented has been obtained, and the present invention has been completed. In addition, in this specification, the slope reaction body is a spraying frame, a spot-casting concrete frame, a precast concrete pressure plate, an iron pressure plate, an aluminum alloy, which is constructed on the slope to stabilize the slope.・ Reinforced plastic pressure plate, mortar spraying, concrete spraying, etc. In addition to anchor bolts of a general configuration, the anchor bolt is a deformed reinforcing bar having a screw-like node on its surface, for example, screw tetsucon (Tokyo Steel Co., Ltd.), AS345 bolt (Okabe Co., Ltd.), OSDP lock. It means what includes various bolts such as bolts (Okabe Co., Ltd.) and self-drilling bolts.

  A first fixing metal according to the present invention is a fixing metal that is attached to an end of an anchor bolt applied to a slope and fixes a slope reaction body on the slope, the slope reaction body. And a first fastening member that fixes the slope reaction force body to the slope via the presser plate, and a portion that comes into contact with the edge of the through hole formed in the presser plate from above An annular seal portion having a convex spherical seal surface, a nut portion screwed into an anchor bolt below the press plate, and an operation portion for rotating the nut portion above the press plate The 1st fastening member which has this.

  In the first fixing hardware, the seal portion of the first fastening member is pressed against the edge of the through hole of the press plate to close the through hole, and the nut portion of the first fastening member is located below the press plate. Is screwed into the upper end portion of the anchor bolt, so that intrusion of rainwater or the like into the screwed portion is prevented by the presser plate and the first fastening member, and the generation of rust in the screwed portion can be effectively prevented. Moreover, since the press plate and the first fastening member can prevent rainwater and the like from entering the threaded portion, the protective cap can be omitted, and the anchor bolt can be configured to be short, and the fixing hardware and the anchor bolt can be manufactured accordingly. Can be cheaper. In addition, since only a part of the seal portion of the first fastening member and the operation portion are disposed above the presser plate, the amount of protrusion of the fixing hardware can be reduced compared to the case where a protective cap is provided as in the past. It is possible to effectively prevent the deterioration of the external appearance of the slope reaction force body such as the frame by providing the fixing hardware. Furthermore, since the amount of fixed metal protrusion is small, even when it is constructed on the road, it can be prevented that the fixed metal object comes into contact with cars or pedestrians. Contact with drifting objects at the time can be prevented. Moreover, since the partially convex spherical sealing surface is pressed against the edge of the through hole to close the through hole, even if the angle between the press plate and the anchor bolt is slightly deviated from the right angle, the seal surface The through hole can be reliably closed, and a gap is not formed between the seal surface and the presser plate, and rain water or the like can be effectively prevented from entering the lower side of the presser plate. Further, as the operation portion, for example, a hexagonal columnar bolt head can be formed on the first fastening member, but when a hexagonal wrench hole is formed, for example, a protruding portion of the fixing hardware protruding from the receiving plate The appearance can be more effectively prevented from being reduced by providing a fixing metal.

  A second fixing metal of the present invention is a fixing metal that is attached to an end of an anchor bolt installed on a slope, and fixes the slope reaction body on the slope, and the slope reaction body is A presser plate that is pressed from above, a nut member that is disposed below the presser plate and is screwed to the end of the anchor bolt, and a slope reaction force member that is fixed to the slope via the presser plate 2 fastening members, an annular seal portion having a partially convex spherical seal surface that comes into contact with the lip of the through hole formed in the holding plate from above, a bolt portion screwed into the nut member, And a second fastening member having an operation portion for rotating the bolt portion above the presser plate.

  In this second fixing hardware, the seal portion of the second fastening member is pressed against the edge of the through hole of the press plate to close the through hole, and the nut is attached to the upper end portion of the anchor bolt below the press plate. Since the member and the bolt portion of the second fastening member are screwed to the upper end portion of the nut member, entry of rainwater or the like into the screwed portion is prevented by the presser plate and the second fastening member, and the screwed portion The generation of rust can be effectively prevented. In addition, since the press plate and the second fastening member prevent rainwater and the like from entering the threaded portion, the protective cap is omitted and the anchor bolt is configured to be short so that the fixing hardware and the anchor bolt are manufactured accordingly. Cost can be reduced. In addition, since only a part of the seal portion of the second fastening member and the operation portion are disposed above the presser plate, the amount of fixing metal protruding can be reduced compared to the case where a protective cap is provided as in the prior art. It is possible to effectively prevent the deterioration of the external appearance of the slope reaction force body such as the frame by providing the fixing hardware. Furthermore, since the amount of fixed metal protrusion is small, even when it is constructed on the road, it can be prevented that the fixed metal object comes into contact with cars or pedestrians. Contact with drifting objects at the time can be prevented. Moreover, since the partially convex spherical sealing surface is pressed against the edge of the through hole to close the through hole, even if the angle between the press plate and the anchor bolt is slightly deviated from the right angle, the seal surface The through hole can be reliably closed, and a gap is not formed between the seal surface and the presser plate, and rain water or the like can be effectively prevented from entering the lower side of the presser plate. Further, as the operation portion, for example, a hexagonal columnar bolt head can be formed on the second fastening member. However, if a hexagonal wrench hole is formed, for example, a protruding portion of the fixing hardware protruding from the receiving plate The appearance can be more effectively prevented from being reduced by providing a fixing metal.

  Here, in the first and second fixing hardwares, it is a preferred embodiment to form a partially concave spherical receiving surface that fits the seal surface at the edge of the through hole of the presser plate. In this case, even if the angle between the presser plate and the anchor bolt is slightly deviated from a right angle, the through hole of the presser plate can be securely closed by contacting the seal surface to the receiving surface with almost no gap. Thus, it is possible to prevent the formation of a gap between the seal surface and the presser plate, and to more effectively prevent rainwater and the like from entering the lower side of the presser plate. However, instead of the partially concave spherical receiving surface, a taper surface that increases in diameter toward the upper edge at the mouth of the through hole of the presser plate may be formed so as to be able to contact the seal surface. An effect is obtained.

  The slope stabilizing structure according to the present invention is provided with a drilling hole and an insertion hole in a continuous manner in a slope and a slope reaction body constructed on the upper side thereof, and an anchor bolt is attached to a grout filled in the insertion hole and the drilling hole. The fixing hardware according to any one of claims 1 to 3 is assembled over the anchor bolt and the slope reaction body, and the slope reaction body is fixed to the slope via the fixing hardware. It has been made.

  In this slope stabilizing structure, the first or second fixing hardware is used, so that rainwater or the like enters the screwed portion of the anchor bolt and the nut portion or the screwed portion of the anchor bolt and the nut member. This can effectively prevent the occurrence of rust at the screwed portion. For this reason, the protective cap is omitted and the anchor bolt is configured to be short, so that the manufacturing cost of the fixing hardware and the anchor bolt can be reduced, and the fixing hardware is prevented from protruding greatly on the slope reaction force body, It is possible to prevent the appearance of the slope reaction force member from being deteriorated by providing the fixing metal. In addition, since the fixed metal projections are small, the fixed metal hardware can be prevented from coming into contact with automobiles and pedestrians even when it is installed on the road, and even when it is used as a slope reaction force for revetment. Contact with drifting objects at the time can be prevented. In addition, the fixing surface can be installed by pressing the partially convex spherical seal surface against the edge of the through hole of the presser plate, so even if the angle between the presser plate and the anchor bolt slightly deviates from the right angle, the seal surface Thus, the through hole can be reliably closed, and a gap is not formed between the sealing surface and the presser plate, and rain water or the like can be effectively prevented from entering the lower side of the presser plate.

  The slope stabilization method according to the present invention is formed by forming an insertion hole in the slope reaction force body and communicating with the insertion hole to form a drilling hole on the slope, and filling the insertion hole and the drilling hole with grout. In addition, an anchor bolt is embedded in the grout over the insertion hole and the drilling hole, and the fixing hardware according to any one of claims 1 to 3 is used, and the nut portion of the first fastening member is attached to the press plate. After the nut portion of the first fastening member is screwed to the end portion of the anchor bolt in the state of being inserted through the through hole, or the second fastening member and the nut member are screwed to the end portion of the anchor bolt, With the bolt part inserted into the through hole of the presser plate, the bolt part is screwed into the nut member, and the presser plate is installed on the slope reaction force body so that the insertion hole is closed. In this way, the slope reaction force is fixed to the slope.

  In this slope stabilization method, since the first or second fixing hardware is used, the same effect as the slope stabilization structure can be obtained.

  According to the fixing hardware according to the present invention, the slope stabilization structure and the slope stabilization method using the same, it is possible to prevent rainwater and the like from entering the threaded portion of the anchor bolt and the fixing hardware by the presser plate and the fastening member. And generation | occurrence | production of the rust in a screwing part can be prevented effectively. For this reason, the protective cap is omitted and the anchor bolt is configured to be short, so that the manufacturing cost of the fixing hardware and the anchor bolt can be reduced, and the protruding amount of the fixing hardware from the slope reaction body such as the frame is reduced. Thus, it is possible to prevent the appearance of the slope reaction force body such as the legal frame from being deteriorated by providing the fixing hardware. In addition, since the fixed metal projections are small, the fixed metal hardware can be prevented from coming into contact with automobiles and pedestrians even when it is installed on the road, and even when it is used as a slope reaction force for revetment. Contact with drifting objects at the time can be prevented. Furthermore, since the partially convex spherical sealing surface is pressed against the edge of the through hole, the through hole can be reliably closed with the sealing surface even if the angle formed by the presser plate and the anchor bolt is slightly deviated from the right angle. It is possible to prevent a gap from being formed between the sealing surface and the presser plate, and effectively prevent rainwater and the like from entering the lower side of the presser plate.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
As shown in FIG. 1 to FIG. 3, the slope stabilization structure is provided with a drilling hole 3 and an insertion hole 4 in communication with the slope 1 and the slope frame 2 constructed on the upper side thereof. An anchor bolt 6 is embedded in a grout 5 filled in the hole 3, a fixing hardware 10 is fixed to the end of the anchor bolt 6, and the frame 2 is fixed to the slope 1 via the fixing hardware 10. The slope 1 is stabilized via the frame 2.

  The frame 2 is constructed by a well-known construction method. For example, after leveling the slope 1 made of sloped land, lay a metal net (not shown) and place a non-illustrated bar on it, and then spray mortar along the bar. Will do. In this embodiment, in order to install the anchor bolt 6 on the slope 1, the mortar is sprayed in a state where a cylindrical formwork (not shown) is previously installed, and the vertical frame 2a and the horizontal frame of the slope 2 The insertion hole 4 is formed in the intersection 2c of 2b. After the construction of the method frame 2, first, as shown in FIG. 5 (a), the drilling hole 3 communicating with the insertion hole 4 is formed on the rock mass 1 by the rock drilling rod 8, and then, FIG. As shown in (b), the hose 9 is inserted to the inner part of the hole 3 and the hose 9 is pulled out while discharging the grout 5 from the hose 9, and the grout 5 is filled into the insertion hole 4 and the hole 3 After that, as shown in FIG. 5 (c), the anchor bolt 6 is embedded in the grout 5 filled in the insertion hole 4 and the drilling hole 3 over the insertion hole 4 and the drilling hole 3. However, in a state where the anchor bolt 6 is inserted into the insertion hole 4 and the drilling hole 3, the grout 5 can be filled in the insertion hole 4 and the drilling hole 3, and the anchor bolt 6 can be embedded in the grout 5. Further, the anchor bolt 6 is embedded in the grout 5 so that the upper end portion thereof is not embedded in the grout 5. After the grout 5 is cured, when the fixing hardware 10 is applied, the grout or other component filler 7 is filled in the vicinity of the upper end of the anchor bolt 6 so that no space is formed in the insertion hole 4. The hardware 10 will be constructed. A specific construction method of the fixing hardware 10 will be described later.

  As shown in FIGS. 1 to 3, the fixing hardware 10 is attached to the end of the anchor bolt 6 constructed on the slope 1 to fix the slope frame 2 as a slope reaction body on the slope 1. A pressing plate 11 that holds the method frame 2 from above and a first fastening member 15 that fixes the method frame 2 to the slope 1 through the holding plate 11 are provided.

  The first fastening member 15 includes an annular seal portion 16 having a partially convex spherical seal surface 16 a that comes into contact with the edge of the through hole 12 formed in the press plate 11 from above, and an anchor on the lower side of the press plate 11. It has a nut part 17 screwed into the bolt 6 and an operation part 18 for rotating the nut part 17 on the upper side of the presser plate 11, and is constituted by a metal integral member.

  The presser plate 11 is made of a circular or rectangular metal plate, and the diameter or length of one side of the presser plate 11 is set to be larger than the diameter of the insertion hole 4 and smaller than the width of the normal frame 2. A through hole 12 is formed at the center of the presser plate 11, and a partially concave spherical receiving surface 12 a that matches the partially convex spherical seal surface 16 a of the first fastening member 15 is formed at the mouth edge of the through hole 12. Has been. However, as the receiving surface 12a, it is also possible to provide a receiving surface having a tapered surface shape whose diameter increases toward the upper side at the rim of the through hole 12.

  The upper end portion of the anchor bolt 6 is disposed at a position slightly lower than the upper surface of the frame 2, and a female screw into which the upper end portion of the anchor bolt 6 is screwed is formed in the nut portion 17 of the first fastening member 15. . The outer diameter of the nut portion 17 is configured to be smaller than the through hole 12 of the presser plate 11, and the nut portion 17 is inserted into the through hole 12 so that the nut portion 17 can be screwed onto the upper end portion of the anchor bolt 6. Has been. A flange-like seal portion 16 is formed at one end portion of the first fastening member 15, and the outer diameter of the seal portion 16 is configured to be larger than the through hole 12. A partially convex spherical seal surface 16a is formed which is in contact with the receiving surface 12a from above with almost no gap. A hexagonal hole in which a hexagonal wrench is inserted as the operation portion 18 to rotate the first fastening member 15 is recessed at the center of the upper surface of the first fastening member 15. However, a polygonal hole other than a hexagon can be provided as the operation portion 18 in a recessed manner. Further, instead of the hexagonal hole, it is possible to form a bolt head having a polygonal column shape on the upper portion of the first fastening member 15, and to form an outer peripheral portion of the seal portion 16 into a polygon. It can also be used as a department.

Next, a construction method of the fixing hardware 10 will be described.
First, after the grout 5 in the insertion hole 4 and the drilling hole 3 shown in FIG. 5C is hardened, the space portion on the opening side of the insertion hole 4 is filled with a filler 7 of grout or other components, The presser plate 11 is placed on the upper side of the method frame 2 so as to close the insertion hole 4 before the filler 7 is cured. Then, the nut portion 17 of the first fastening member 15 is inserted into the through hole 12 of the holding plate 11, and the first screw is used with a hexagon wrench so that the female screw of the nut portion 17 is screwed into the end portion of the anchor bolt 6. The fastening member 15 is rotated, the first fastening member 15 is fastened to the anchor bolt 6, and the frame 2 is fixed to the slope 1 via the presser plate 11 and the first fastening member 15. However, as described above, when the nut portion 17 is screwed into the anchor bolt 6 after the insertion hole 4 is filled with the filler 7, the filler 7 enters the nut portion 17 and the nut portion 17. May not be fastened to the anchor bolt 6 smoothly. Therefore, it is also a preferred embodiment that the insertion hole 4 is filled with the filler 7 during or after the fixing hardware 10 is applied. In this case, it is also preferable that a filling hole for supplying the filler 7 to the insertion hole 4 is formed in the holding plate 11 and the filler 7 is filled into the insertion hole 4 through the filling hole. It is a form. However, it is also possible to omit the filler 7 and leave the opening side of the insertion hole 4 hollow.

  When the fixing frame 10 is fixed using the fixing metal 10 having such a configuration, the seal portion 16 of the first fastening member 15 is pressed against the edge of the through hole 12 of the presser plate 11 to close the through hole 12. At the same time, the nut portion 17 of the first fastening member 15 is screwed into the upper end portion of the anchor bolt 6 below the retainer plate 11, so that the nut portion 17 and the anchor bolt 6 are connected by the retainer plate 11 and the seal portion 16. It is possible to prevent rainwater and the like from entering the threaded portion, and to prevent the occurrence of rust at the threaded portion. Therefore, in the fixing metal 10, the protective cap provided in the past can be omitted, and the anchor bolt 6 can be configured to be short, and the manufacturing cost of the fixing metal 10 and the anchor bolt 6 can be reduced accordingly. Further, the amount of protrusion of the fixing metal 10 from the method frame 2 can be reduced, so that the appearance of the method frame 2 due to the fixing metal 10 can be prevented from being deteriorated, and damage to the fixing metal 10 due to contact with other objects can be prevented. In addition, since the partially convex spherical seal surface 16a is pressed against the lip of the through hole 12 to close the through hole 12, the angle θ formed by the presser plate 11 and the anchor bolt 6 is a right angle as shown in FIG. Even if it is slightly deviated from, the through hole 12 can be reliably closed by the seal surface 16a, and a gap is prevented from being formed between the seal surface 16a and the press plate 11, and the lower side of the press plate 11 It is possible to effectively prevent rainwater and the like from entering.

  Next, another fixing metal 20 in which the configuration of the fixing metal 10 is partially changed will be described. The same members as those in the above embodiment are given the same reference numerals, and detailed description thereof is omitted.

  As shown in FIGS. 6 and 7, the fixing hardware 20 includes a pressing plate 11 having the same configuration as that of the above-described embodiment for pressing the frame 2 as a slope reaction force member from the upper side, and a lower side than the pressing plate 11. And a second fastening member 25 for fixing the method frame 2 to the slope 1 via the holding plate 11, which is formed on the holding plate 11. An annular seal portion 26 having a partially convex spherical seal surface 26 a that comes into contact with the edge of the through-hole 12 from above, a bolt portion 27 screwed into the nut member 21, and a bolt above the presser plate 11. A second fastening member 25 having an operation portion 28 for rotating the portion 27 is provided.

  A female screw is formed in the nut member 21, the lower half portion of the nut member 21 is screwed to the upper end portion of the anchor bolt 6, and the upper half portion is screwed to the bolt portion 27 of the second fastening member 25. . In a state where the nut member 21 is screwed to the anchor bolt 6, the upper end portion of the nut member is disposed at a position slightly lower than the upper surface of the frame 2. The nut member 21 is formed in a polygonal shape so that the nut member 21 can be rotated with a hexagon wrench or the like.

  The outer diameter of the bolt portion 27 of the second fastening member 25 is configured to be smaller than the through hole 12 of the presser plate 11. A flange-like seal portion 26 is formed at one end of the second fastening member 25, and the outer diameter of the seal portion 26 is configured to be larger than the through hole 12. A partially convex spherical seal surface 26a is formed that abuts the receiving surface 12a from above with substantially no gap. A hexagonal hole in which a hexagonal wrench is inserted as the operation portion 28 and the second fastening member 25 can be rotated is recessed in the center of the upper surface of the first fastening member 15. However, a polygonal hole other than a hexagon can be provided as the operation portion 28. Further, instead of the hexagonal hole, it is possible to form a bolt head with a polygonal column at the upper part of the second fastening member 25, and the outer peripheral part of the seal part 26 is formed into a polygon, and this is operated. It can also be used as a department.

  When the fixing hardware 20 is constructed, as shown in FIG. 5C, after the insertion hole 4 and the grout 5 in the drilling hole 3 shown in FIG. The nut member 21 is screwed into the portion, and thereafter, the grout or other component filler 7 is filled in the cavity on the opening side of the insertion hole 4 so that the filler 7 does not enter the nut member 21. Next, the holding plate 11 is placed on the method frame 2 so as to close the through hole 12 of the method frame 2, and the bolt portion 27 of the second fastening member 25 is inserted into the through hole 12 of the holding plate 11. The bolt portion 27 of the second fastening member 25 is screwed into the nut member 21, the second fastening member 25 is rotated with a hexagon wrench, and the second fastening member 25 is fastened to the nut member 21. The frame 2 is pulled toward the slope 1 side through the second frame, and the frame 2 is fixed to the slope 1 via the second fastening member 25, the nut member 21, and the presser plate 11.

Next, another embodiment in which the configuration of the fixing hardware 10 and 20 is partially changed will be described. The same members as those in the above embodiment are given the same reference numerals, and detailed description thereof is omitted.
(1) Like the fixing metal 10A shown in FIG. 8, in place of the presser plate 11, a presser plate 11A having a round hole-like through hole 12A through which the nut part 17 is inserted is provided, and the seal part 16 and the presser are provided. A ring-shaped washer 30 made of a separate member is provided on the nut portion 17 between the plates 11A as an external fit, and a partially concave spherical receiving surface 30a that fits the seal surface 16a of the first fastening member 15 is formed on the washer 30. And it can comprise so that the fastening load which acts on the seal | sticker part 16 via the washer 30 may be received by 11 A of presser plates. The fixing metal 20 can also be provided with a presser plate 11A instead of the presser plate 11 and a washer 30 that is a separate member from the presser plate 11A and the second fastening member 25.

(2) Like the fixing hardware 10B shown in FIG. 9, the first fastening member 15B in which the flange portion 31 is formed instead of the seal portion 16 is used, and the nut portion 17 is separated from the nut portion 17 between the flange portion 31 and the presser plate 11. A ring-shaped washer 32 is formed in an outer fitting shape, and a partially convex spherical sealing surface 32 a that fits the partially concave spherical receiving surface 12 a of the presser plate 11 is formed on the washer 32. The fastening load acting on the first fastening member 15B can be received by the presser plate 11. For the fixing hardware 20, a second fastening member in which a flange 31 is formed instead of the seal portion 26 can be used, and a washer 32 made of a member different from the pressing plate 11 and the second fastening member can be provided.

  In the present embodiment, the fixing hardware 10 and 20 used when fixing the frame 2 to the slope 1 as a slope reaction body is described below, but concrete is used as the slope reaction body with a substantially constant thickness. The fixing hardware 10 and 20 can be applied in the same manner also when the slope reaction force body sprayed on or when the metal net is fixed to the slope 1 and the slope 1 is stabilized with the metal net. it can. An example of a slope stabilization method when fixing the slope with a metal net is as follows. First, a pedestal with insertion holes formed in the center is installed at set intervals on the upper side of the metal net. A hole is formed in the slope by communication, the grout is filled in the insertion hole and the hole and an anchor bolt is inserted, and the anchor bolt is embedded in the grout. After the grout is hardened, the holding plate 11 is installed on the pedestal so as to close the upper surface of the insertion hole, the fixing hardware 10 and 20 is assembled between the anchor bolt and the pedestal, and the wire is stretched between the adjacent pedestals. And the slope 1 is stabilized with a metal net and a wire, pressing the middle part of a metal net with a wire.

Cross section of slope stabilization structure Expanded sectional view of the main part of the slope stabilization structure Plan view of slope stabilization structure Illustration of the action of the slope stabilization structure (A)-(c) is an explanatory drawing to the construction method of the slope stabilization structure Cross-sectional view of slope stabilization structure using fixing hardware of other configuration Expanded sectional view of the main part of the slope stabilization structure Expanded cross-sectional view of the main part of the slope stabilization structure using fixing hardware of other configurations Expanded cross-sectional view of the main part of the slope stabilization structure using fixing hardware of other configurations

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Slope 2 Method frame 2a Vertical frame 2b Horizontal frame 2c Intersection 3 Drilling hole 4 Insertion hole 5 Grout 6 Anchor bolt 7 Filler 8 Rock drilling rod 9 Hose 10 Fixing metal 11 Press plate 12 Through hole 12a Receiving surface 15 1st Fastening member 16 Seal portion 16a Seal surface 17 Nut portion 18 Operation portion 20 Fixing metal 21 Nut member 25 Second fastening member 26 Seal portion 26a Seal surface 27 Bolt portion 28 Operation portion 10A Fixing metal 11A Press plate 12A Through hole 30 Washer 30a Receiving Surface 10B Fixing hardware 15B First fastening member 31 Gutter 32 Washer 32a Seal surface

Claims (5)

A fixing hardware that is attached to the end of an anchor bolt installed on the slope and fixes the slope reaction body on the slope,
A presser plate for pressing the slope reaction force body from above;
A first fastening member that fixes a slope reaction force body to the slope via the presser plate, and has a partially convex spherical seal surface that comes into contact with the edge of a through hole formed in the presser plate from above. A first fastening member having an annular seal portion, a nut portion screwed into an anchor bolt below the press plate, and an operation portion for rotating the nut portion above the press plate;
Fixing hardware characterized by comprising. A fixing hardware that is attached to the end of an anchor bolt installed on the slope and fixes the slope reaction body on the slope,
A presser plate for pressing the slope reaction force body from above;
A nut member disposed below the presser plate and screwed to the end of the anchor bolt;
A second fastening member for fixing a slope reaction force body to the slope via the presser plate, and having a partially convex spherical sealing surface that comes into contact with the edge of a through hole formed in the presser plate from above A second fastening member having an annular seal portion, a bolt portion screwed into the nut member, and an operation portion for rotating the bolt portion above the presser plate;
Fixing hardware characterized by comprising.   The fixing hardware according to claim 1, wherein a receiving surface having a partially concave spherical shape that fits the seal surface is formed at a lip of the through hole of the pressing plate. A drilling hole and an insertion hole are provided in a continuous manner on the slope and the slope reaction body constructed on the upper side,
An anchor bolt is embedded in the grout filled in the insertion hole and the drilling hole,
The fixing hardware according to any one of claims 1 to 3 is assembled over an anchor bolt and a slope reaction body, and the slope reaction body is fixed to the slope via the fixing hardware.
Slope stabilization structure characterized by that. Form an insertion hole in the slope reaction force body and communicate with the insertion hole to form a hole in the slope.
The grout is filled in the insertion hole and the drilling hole, and the anchor bolt is embedded in the grout over the insertion hole and the drilling hole.
The fixing bracket according to any one of claims 1 to 3, wherein the nut portion of the first fastening member is inserted into the through hole of the holding plate and the nut portion of the first fastening member is inserted into the end of the anchor bolt. After the second fastening member and the nut member are screwed to the end portion of the anchor bolt, the bolt portion is inserted into the through hole of the holding plate, and the bolt portion is used as the nut member. Install the holding plate on the slope reaction force body so that the insertion hole is closed by screwing, and fix the slope reaction force body on the slope through the fixing hardware.
Slope stabilization method characterized by that.

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