JP2017150180A - Fixing device and method for fixing structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fixing device that can reduce possibility of deformation and damage in a part in which a bearing pressure plate and an anchor are connected so as to hold a structure stably.SOLUTION: A fixing device 1 that fixes a structure such as a fence to the ground comprises an anchor 2, a sheath pipe 8, a bearing pressure plate 7 with an open hole 7b, a structure connection part 9 fixed to the bearing pressure plate 7, and an anchor connection part 18 for connecting the sheath pipe 8 and a second end part 5b of the anchor 2. The sheath pipe 8 penetrates the bearing pressure plate 7 through the open hole 7b and is welded to the bearing pressure plate 7 in a state that the upper part of the sheath pipe 8 projects on the bearing pressure plate 7. The projecting part on the bearing pressure plate 7 in the sheath pipe 8 is connected with the second end part 5b of the anchor 2 by the anchor connection part 18.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a fixing device that fixes a structure such as a fence installed on a slope or the like to a ground via a wire or directly, and a method for fixing the structure.

  Conventionally, in order to fix a structure such as a fence installed on a slope or the like to a ground via a wire or directly, a fixing device including an anchor and a bearing plate is used.

  For example, the fixing device described in Patent Literature 1 connects an anchor driven on a slope, a bearing plate installed on the ground at a position away from the anchor toward the valley, and the anchor and the bearing plate. And arm. The lower end portion of the arm is slidably connected in the ground to a support portion provided in a portion of the anchor embedded in the ground with a pin as a fulcrum. The upper end of the arm is connected to the wire on the ground and is restrained by a U-bolt or the like with respect to the bearing plate.

  As a result, when a tensile force acts on the upper end of the arm via a wire from a structure such as a fence, the tensile force is transmitted to the anchor via a support connected to the lower end of the arm with a pin. And can be received by an anchor. At the same time, the arm swings in the direction approaching the ground using the pin of the support portion as a fulcrum, so that the upper end of the arm restrained by the U-bolt on the bearing plate presses the bearing plate against the ground. Thereby, the resistance force (proof strength) with respect to the tension | pulling of a wire is raised.

JP 2003-201713 A

  However, in the fixing device described above, the anchor and the bearing plate are connected via an arm. Specifically, the lower end portion of the arm is connected to a support portion provided on the anchor by a pin, and the upper end portion of the arm is restrained by a U-bolt or the like with respect to the bearing plate.

  In such a structure, when a structure such as a fence receives a large impact due to falling rocks, etc., when a large tensile force acts on the arm via the wire from the structure, the lower side of the arm Since a large force is locally applied to the pin that connects between the end portion and the support portion on the anchor side, and the U bolt that connects the upper end portion of the arm and the bearing plate, the anchor and the bearing plate are coupled. There is a possibility that members such as pins and U bolts to be deformed or damaged. Therefore, there is a possibility that the structure cannot be stably held.

  The present invention has been made in view of the above circumstances, and is capable of reducing the risk of deformation or damage of the portion connecting the bearing plate and the anchor, and capable of stably holding the structure. An object is to provide an apparatus.

  In order to solve the above-described problems, the fixing device of the present invention is a fixing device for fixing a structure to the ground, the first end having a shape that can be driven into the ground, and the first An anchor having a second end opposite to the end and a tube shape having an inner diameter larger than the outer diameter of the second end of the anchor so as to cover the outer periphery of the second end A sheath plate arranged, a bearing plate arranged along the ground, the bearing plate having a through hole having an inner diameter larger than the outer diameter of the sheath tube, and the structure fixed to the bearing plate; A structure connecting portion having a structure connectable to an object, and an anchor connecting portion for connecting the sheath tube and the second end of the anchor, and the sheath tube passes through the through hole. The upper part of the sheath pipe while penetrating the bearing plate The portion of the sheath tube protruding above the bearing plate is welded to the second end portion of the anchor by the anchor connecting portion in a state of protruding onto the bearing plate. It is connected.

  According to this configuration, as shown below, the bearing plate and the anchor are connected via the sheath that is fitted to the outer periphery of the anchor, so that the portion connecting the bearing plate and the anchor may be deformed or damaged. It is to reduce.

  The anchor is driven into the ground with the first end as the head and the second end protrudes above the ground. The bearing plate is installed on the ground, and the sheath pipe welded in a state of penetrating the bearing plate is fitted on the outer periphery of the second end portion of the anchor. The protruding portion protruding above the bearing plate is connected to the second end portion of the anchor by the anchor connecting portion. As a result, when the bearing plate receives a tensile force from the structure via the structure connecting portion, the bearing plate is dispersed over a wide range of the outer peripheral surface of the anchor with which the sheath tube comes into contact via the sheath tube. It is possible to communicate. As a result, even if the bearing plate receives a large tensile force from the structure, the part that transmits the force between the bearing plate and the anchor, that is, the portion such as the sheath or pipe, is deformed such as bent or recessed. The risk of doing this is reduced. As a result, the structure can be stably held.

  The anchor protrudes from the outer peripheral surface of the anchor body to the outside of the anchor body between the anchor body having the first end and the second end, and between the first end and the second end. It is preferable to have the protrusion part which does.

  According to such a configuration, the anchor has a protruding portion that protrudes from the outer peripheral surface of the anchor main body to the outside of the anchor main body. Therefore, when the anchor is driven into the ground, the protruding portion has a wide range of soil in the ground. The contact area with the soil increases at the anchor. Therefore, it is possible to increase the reaction force that the anchor receives from the soil (for example, the resistance force against the pulling direction and the bending direction of the anchor).

  Furthermore, it is preferable that the protruding portion protrudes from the outer peripheral surface of the anchor main body in a direction inclined with respect to the direction from the anchor main body toward the structure connecting portion.

  According to this configuration, when the structure connecting portion receives a tensile force from the structure, the protruding portion of the anchor reacts from the soil in the opposite direction to the direction in which the structure connecting portion receives the tensile force. By receiving the force, the resistance force of the fixing device is improved and the structure can be supported stably.

  Moreover, it is preferable that the said protrusion part is arrange | positioned in the position below the part connected with the said sheath pipe | tube in the said 2nd end part of the said anchor main body.

  According to such a configuration, when the sheath tube is connected to the second end portion located at the upper portion of the anchor main body driven into the ground, the protruding portion of the anchor does not interfere with the sheath tube. There is no risk of deformation or breakage of the protrusion when connected to the anchor. Further, since the protruding portion is located at a position lower than the portion connected to the sheath tube at the second end portion, it is possible to improve the resistance force against the pulling direction of the anchor received from the soil.

  The bearing plate includes a main body part that abuts on the ground, and a bent part that is bent at an edge extending in a direction in which the sheath pipe and the structure connecting part that penetrate the through hole are arranged in the edge of the main body part. It is preferable to have.

  According to such a configuration, the support plate has a bent portion in which the edge extending in the direction in which the sheath and the structure connecting portion are aligned is bent among the edges of the main body portion in contact with the ground, thereby providing a flat plate-like support. Compared with a pressure plate, the rigidity with respect to the bending of the bearing plate in the direction deviating from the direction in which the sheath and the structure connecting portion are arranged is improved.

  It is preferable that the bent portion faces the lower side of the bearing plate.

  According to such a configuration, when the bearing plate is installed on the ground, the bent portion of the bearing plate is inserted into the ground, thereby improving the resistance force against the pulling direction of the bearing plate received from the structure. Is possible.

  It is preferable to further include an auxiliary anchor connected to the bearing plate at a position spaced from the anchor.

  According to such a configuration, in a state where the anchor and the auxiliary anchor are driven into the ground, when the bearing plate receives a tensile force from the structure via the structure connecting portion, the tensile force is applied to both the anchor and the auxiliary anchor. It is possible to receive in a distributed manner. As a result, it is possible to reduce the possibility that the bearing plate shifts in the direction of the tensile force, and to reduce the burden on the anchor and to reduce the risk of deformation such as bending of the anchor.

  The bearing plate has a shape extending in a direction in which the sheath tube penetrating the through hole and the structure connecting portion are arranged, and the auxiliary anchor is opposite to the sheath tube in the structure connecting portion. It is preferable to be connected to the bearing plate at the position.

  According to this configuration, the anchor plate and the auxiliary anchor are respectively connected to the bearing plate on both sides in the direction in which the sheath tube and the structure coupling portion are arranged across the structure coupling portion, so that the bearing plate is stably fixed to the ground. Is possible.

  Moreover, it is preferable that the said auxiliary anchor has a long anchor main body and the protrusion part which protrudes to the outer side of the said anchor main body from the outer peripheral surface of the said anchor main body.

  According to such a configuration, the auxiliary anchor has the protruding portion that protrudes from the outer peripheral surface of the anchor body to the outside of the anchor body. Therefore, when the auxiliary anchor is driven into the ground, the protruding portion has a wide range in the ground. Since it touches the soil, the contact area of the auxiliary anchor with the soil increases. As a result, it is possible to increase the reaction force that the auxiliary anchor receives from the soil (for example, resistance to the bending direction of the auxiliary anchor).

  Furthermore, it is preferable that the protruding portion protrudes from the outer peripheral surface of the anchor main body in a direction inclined with respect to the direction from the anchor main body toward the structure connecting portion.

  According to such a configuration, when the structure connecting portion receives a tensile force from the structure, the protruding portion of the auxiliary anchor extends from the soil in the direction opposite to the direction in which the structure connecting portion receives the tensile force. By receiving the reaction force, the resistance force of the fixing device is improved and the structure can be stably supported.

  The structure fixing method of the present invention is a structure fixing method for fixing a structure to the ground, and a pipe-shaped sheath tube penetrates the bearing plate through a through-hole formed in the bearing plate and the sheath. Preparing a pipe welded to the bearing plate with the upper portion of the tube protruding above the bearing plate, and driving the anchor into the ground so that the upper end of the anchor projects above the ground; Installing the bearing plate on the ground and fitting the sheath tube on the outer periphery of the upper end of the anchor; and projecting the portion of the sheath tube that protrudes above the bearing plate on the upper side of the anchor. The method includes a step of connecting to the end portion and a step of connecting the structure to the bearing plate.

  In the above fixing method, the anchor is driven into the ground and the step of installing the bearing plate on the ground and the step of fitting the sheath tube to the outer periphery of the anchor are performed separately, so that the anchor can be driven and the bearing plate is installed easily. In addition, it is possible to reduce the risk of damage or deformation of the bearing plate, sheath, or tube. In addition, after these steps, the anchor, the sheath, and the bearing plate are joined together by connecting the sheath and the upper end of the anchor with the anchor connecting portion, so that the rigidity is high by simple construction. It is possible to obtain a fixing device.

  Furthermore, it is preferable to further include a step of driving the auxiliary anchor into the ground while being connected to the bearing plate at a position separated from the anchor.

  In this case, while avoiding interference with the anchor, the auxiliary anchor can be easily driven into the ground and connected to the bearing plate.

  As described above, according to the fixing device of the present invention, it is possible to reduce the risk of deformation or damage of the portion connecting the bearing plate and the anchor, and stably hold the structure.

It is a front view which shows the whole structure of the fixing device connected with a structure via the wire which concerns on embodiment of the fixing device of this invention. It is a top view of the fixing device of FIG. It is a top view of the auxiliary | assistant anchor vicinity of FIG. It is a front view of the main anchor of FIG. It is a front view of the auxiliary anchor of FIG. It is a figure which shows the driving process of the main anchor in the fixing method of the structure of FIG. 1, (a) is a front view, (b) is a top view. It is a figure which shows the process of installing the bearing plate in the fixing method of the structure of FIG. 1, and connecting a sheath pipe | tube and a main anchor, (a) is a front view, (b) is a top view. It is a figure which shows the driving process of the auxiliary anchor in the fixing method of the structure of FIG. 1, (a) is a front view, (b) is a top view. It is a front view which shows the whole structure of the fixing device connected with the support | pillar of the structure which concerns on other embodiment of the fixing device of this invention. It is the figure which looked at the fixing device of FIG. 9 from the direction of arrow P. FIG. 10 is a plan view of a rockfall prevention fence including the fixing device of FIG. 1 and the fixing device of FIG. 9. It is a front view of the rock fall prevention fence of FIG. It is a figure which shows the support | pillar in the rock fall prevention fence of FIG. 11, and its peripheral part.

  Hereinafter, embodiments of the fixing device of the present invention will be described in more detail with reference to the drawings.

  The fixing device 1 shown in FIGS. 1 and 2 has a configuration for fixing a structure such as a fence to the ground G via a linear body such as a wire W. Specifically, the fixing device 1 includes a main anchor 2, a bearing plate assembly 3, an auxiliary anchor 4, and an anchor connecting portion 18.

  The bearing plate assembly 3 includes a bearing plate 7, a sheath tube 8, and a structure connecting portion 9. The sheath plate 8 and the structure connecting portion 9 are joined to the bearing plate 7 by welding to constitute the bearing plate assembly 3.

  The main anchor 2 corresponds to the anchor of the present invention. As shown in FIGS. 1 and 2 and FIG. 4, a long cylindrical pipe anchor 5 that is an anchor main body and an outer periphery of the pipe anchor 5. It has the blade | wing 6 which is a projection part fixed to the surface.

  The pipe anchor 5 has upper and lower ends of the main anchor 2, that is, a lower first end 5 a and an opposite (ie upper) second end 5 b. The first end 5a has a shape that can be driven into the ground G, and has, for example, a tapered shape such as a cone. A through hole 5c extending in the horizontal direction is formed in the second end portion 5b. In addition, as a main anchor 2 (anchor) anchor body, a rod-shaped anchor can be used in addition to the pipe anchor 5.

  The blade 6 is a single plate-like member, and is fixed to a position between the first end 5a and the second end 5b on the outer peripheral surface of the pipe anchor 5 by welding or the like. The blades 6 extend from the outer peripheral surface of the pipe anchor 5 in a direction protruding to the outside of the pipe anchor 5. The blade 6 increases the contact area with the soil of the main anchor 2.

  The blades 6 project from the outer peripheral surface of the pipe anchor 5 in a direction inclined with respect to the direction D from the pipe anchor 5 toward the structure connecting portion 9 (a direction orthogonal in the present embodiment). Note that the direction in which the blade 6 protrudes only needs to be inclined with respect to the direction D, and is not limited to being orthogonal to the direction D in the present invention.

  Since the blade 6 is disposed at a position below the portion connected to the sheath tube 8 in the second end portion 5b of the pipe anchor 5, there is no possibility of interference with the sheath tube 8.

  Next, the bearing plate 7, the sheath tube 8, and the structure connecting portion 9 constituting the bearing plate assembly 3 will be described.

  1-2, the pressure bearing plate 7 has a long shape extending in the direction D in which the sheath 8 penetrating the through hole 7b and the structure connecting portion 9 are arranged. The bearing plate 7 is disposed along the ground G.

  The bearing plate 7 includes a main body portion 7a that abuts the ground G and a pair of bent portions 7c formed at the edge of the main body portion 7a.

  A through hole 7 b having an inner diameter larger than the outer diameter of the sheath 8 is formed at one end in the longitudinal direction (the direction D) of the main body portion 7 a of the bearing plate 7.

  The bent portion 7c is bent downward at an edge extending in the direction D in which the sheath 8 and the structure connecting portion 9 are lined up through the through hole 7b among the edges of the main body portion 7a. Since the bent portion 7c faces downward, the bent portion 7c is embedded in the ground when the main body portion 7a of the bearing plate 7 is in contact with the ground G.

  The sheath tube 8 has a tube shape having an inner diameter larger than the outer diameter of the second end portion 5 b of the pipe anchor 5. The sheath tube 8 is disposed so as to cover the outer peripheral portion of the second end portion 5b.

  The sheath tube 8 penetrates the bearing plate 7 through the through hole 7 b of the bearing plate 7. At the same time, the sheath tube 8 is welded to the bearing plate 7 with the upper portion of the sheath tube 8 protruding above the bearing plate 7. Specifically, the outer peripheral surface of the sheath tube 8 and the edge of the through hole 7 b of the bearing plate 7 are welded on the entire circumference or a part of the sheath tube 8. Further, as shown in FIG. 1, plate-like ribs 10 are welded to the lower surface of the bearing plate 7 and the outer peripheral surface of the sheath tube 8 in order to reinforce the bearing plate 7 and the sheath tube 8.

  The structure connecting portion 9 is fixed to the bearing plate 7 and has a structure that can be connected to the structure. Specifically, it includes a vertical plate 13 erected on the bearing plate 7, a shackle 14 coupled to the vertical plate 13 with a pin or the like, and a reinforcing plate 15 that prevents the vertical plate 13 from falling down. The shackle 14 is coupled to an end portion of the wire W connected to a structure such as a fence.

  The portion of the sheath tube 8 that protrudes above the bearing plate 7 is connected to the second end 5b of the pipe anchor 5 on the main anchor 2 side by an anchor connecting portion 18.

  The anchor connecting portion 18 only needs to have a configuration for connecting the sheath tube 8 and the second end portion 5 b of the pipe anchor 5. For example, the anchor connecting portion 18 includes a bolt 11 and a nut 12 screwed into the bolt 11. Is done. The bolt 11 has a length that can penetrate the through hole 5c formed in the second end portion 5b of the pipe anchor 5 and the through hole 8a formed in the upper portion of the sheath tube 8 (that is, the outer diameter of the sheath tube 8). Over length).

  As shown in FIGS. 1 to 3 and FIG. 5, the auxiliary anchor 4 has a long rod-shaped anchor 16 and a blade 17 that projects from the outer peripheral surface of the rod-shaped anchor 16 to the outside of the rod-shaped anchor 16. Yes. The blade 17 is a single plate-like member, and is fixed to the outer peripheral surface of the rod-shaped anchor 16 by welding or the like. The blades 17 protrude from the outer peripheral surface of the rod-shaped anchor 16 to the outside of the rod-shaped anchor 16.

  The auxiliary anchor 4 is connected to the bearing plate 7 at a position separated from the main anchor 2. The auxiliary anchor 4 is connected to a long support plate 7 having a shape extending in the direction D described above at a position opposite to the sheath tube 8 in the structure connecting portion 9. Specifically, a through hole 7d that partially communicates with an end surface 7e on the opposite side is formed on the long side pressure plate 7 on the side opposite to the end where the through hole 7b is provided. The rod-shaped anchor 16 of the auxiliary anchor 7 is inserted into the through-hole 7d, and the blades 17 fixed to the outer peripheral surface of the rod-shaped anchor 16 are arranged in contact with the end surface 7e. The welded portion between the rod-shaped anchor 16 and the blade 17 is inserted into an opening 7f opened to the end surface 7e in the through hole 7d.

  The blade 17 protrudes from the outer peripheral surface of the rod-shaped anchor 16 in a direction (a direction orthogonal to the present embodiment) inclined with respect to a direction (direction opposite to the direction D) from the auxiliary anchor 4 toward the structure connecting portion 9. . Note that the direction in which the blades 17 protrude is not limited to being orthogonal to the direction D in the present invention, as long as it is inclined with respect to the direction D as in the case of the blade 6.

  A bent portion 17 a that is bent in the direction D is formed at both ends of the blade 17.

  The blades 17 prevent the support plate 7 from shifting in the direction D due to a reaction force from the soil when the support plate 7 receives a force in the direction D from the structure via the structure connecting portion 9. Further, the bent portion 17a facing the direction D is recessed into the soil, thereby increasing the reaction force received from the soil.

  In the fixing device 1 of the present embodiment configured as described above, the bearing plate 7 and the main anchor 2 are connected via the sheath tube 8 fitted on the outer periphery of the pipe anchor 5 on the main anchor 2 side. It is possible to reduce the risk of deformation or damage of a portion connecting the bearing plate 7 and the main anchor 2, that is, a portion such as the sheath tube 8 and the anchor connecting portion 18.

  That is, the main anchor 2 is driven into the ground G with the first end 5a of the pipe anchor 5 as the head, and the second end 5b protrudes above the ground G. The bearing plate 7 is installed on the ground G, and the sheath 8 welded in a state of penetrating the bearing plate 7 is fitted on the outer periphery of the second end portion 5 b of the pipe anchor 5. The protruding portion protruding above the bearing plate 7 is connected to the second end portion 5 b of the pipe anchor 5 by the anchor connecting portion 18. Thereby, when the bearing plate 7 receives a tensile force from the structure via the structure connecting portion 9, the bearing plate 7 is in a wide area on the outer peripheral surface of the main anchor 2 with which the sheath tube 8 contacts via the sheath tube 8. It is possible to disperse and transmit the tensile force. As a result, even when the bearing plate 7 receives a large tensile force from the structure, the sheath tube 8 and the anchor connecting portion 18 that transmit force between the bearing plate 7 and the main anchor 2 are used. The portion is less likely to be bent or dented. As a result, the structure can be stably held.

  Further, in the fixing device 1 of the present embodiment, the main anchor 2 has the blades 6 that protrude from the outer peripheral surface of the pipe anchor 5 to the outside of the pipe anchor 5, so that the main anchor 2 is driven into the ground G. In the state, since the blade 6 contacts the soil in a wide range in the ground, the contact area with the soil in the main anchor 2 increases. Therefore, it is possible to increase the reaction force that the main anchor 2 receives from the soil (for example, the resistance force against the pulling direction and the bending direction of the main anchor 2).

  Furthermore, in the fixing device 1 of the present embodiment, the blades 6 are arranged on the outer periphery of the pipe anchor 5 in a direction inclined in a direction D (direction orthogonal to the present embodiment) with respect to the direction D from the pipe anchor 5 toward the structure connecting portion 9. Projects from the surface. Therefore, when the structure connecting portion 9 receives a tensile force from the structure in the same direction T as the direction D, the blade 6 of the main anchor 2 receives a reaction force from the soil in the opposite direction to the direction T. As a result, the resistance of the fixing device 1 is improved, and the structure can be stably supported.

  In the fixing device 1 of the present embodiment, the blade 6 is disposed at a position below the portion connected to the sheath tube 8 at the second end portion 5 b of the pipe anchor 5. Therefore, when the sheath tube 8 is connected to the second end portion 5b located at the top of the pipe anchor 5 driven into the ground G, the blade 6 of the main anchor 2 does not interfere with the sheath tube 8, When the sheath 8 is connected to the main anchor 2, there is no possibility that the blade 6 is deformed or broken. Further, since the blade 6 is located below the portion connected to the sheath tube 8 at the second end portion 5b, it is possible to improve the resistance force against the pulling direction of the main anchor 2 received from the soil. .

  In the fixing device 1 of the present embodiment, the bearing plate 7 is a bent portion 7c in which the edge extending in the direction D in which the sheath tube 8 and the structure connecting portion 9 are arranged is bent among the edges of the main body portion 7a contacting the ground G. Therefore, the rigidity against bending of the bearing plate 7 in the direction deviating from the direction D in which the sheath tube 8 and the structure connecting portion 9 are arranged is improved as compared with the plate-like bearing plate 7.

  Furthermore, in the fixing device 1 of the present embodiment, the bent portion 7c faces the lower side of the support plate 7. Therefore, when the support plate 7 is installed on the ground G, the bent portion 7c of the support plate 7 is By being inserted into the ground, it is possible to improve the resistance force against the pulling direction of the bearing plate 7 received from the structure. Even when the bent portion 7c faces upward, the rigidity against bending of the bearing plate 7 in the direction deviating from the direction D in which the sheath 8 and the structure connecting portion 9 are arranged is improved.

  The fixing device 1 according to the present embodiment includes an auxiliary anchor 4 that is connected to the bearing plate 7 at a position separated from the main anchor 2. Thereby, in a state where the main anchor 2 and the auxiliary anchor 4 are driven into the ground G, when the bearing plate 7 receives a tensile force from the structure via the structure connecting portion 9, the tensile force is applied to the main anchor 2. And the auxiliary anchor 4 can be received in a distributed manner. Thereby, it is possible to reduce the possibility that the bearing plate 7 shifts in the direction of the tensile force and to reduce the burden on the main anchor 2 and to reduce the risk of deformation such as bending of the main anchor 2.

  Moreover, in the fixing device 1 of the present embodiment, the bearing plate 7 has a shape that extends in the direction D in which the sheath 8 and the structure connecting portion 9 are arranged through the through hole 7b. The auxiliary anchor 4 is connected to the bearing plate 7 at a position opposite to the sheath tube 8 in the bearing plate 7. For this reason, the main anchor 2 and the auxiliary anchor 4 are respectively connected to the bearing plate 7 on both sides in the direction D in which the sheath tube 8 and the structure coupling portion 9 are arranged across the structure coupling portion 9. It can be stably fixed to the ground G.

  In the fixing device 1 of the present embodiment, the auxiliary anchor 4 has the blades 17 protruding from the outer peripheral surface of the rod-shaped anchor 16 to the outside of the rod-shaped anchor 16, so that the auxiliary anchor 4 is driven into the ground G Then, since the blade | wing 17 contacts the soil in a wide range in the ground, the contact area with the soil in the auxiliary anchor 4 increases. As a result, the reaction force that the auxiliary anchor 4 receives from the soil (for example, the resistance force against the bending direction of the auxiliary anchor 4) can be increased.

  Further, in the fixing device 1 of the present embodiment, the blade 17 protrudes from the outer peripheral surface of the rod-shaped anchor 16 in a direction inclined with respect to the direction D from the rod-shaped anchor 16 toward the structure connecting portion 9. Therefore, when the structure connecting portion 9 receives a tensile force from the structure in the same direction T as the direction D, the blade 17 of the auxiliary anchor 4 is opposite to the direction T in which the structure connecting portion 9 receives the tensile force. By receiving the reaction force from the underground soil in the direction, the resistance force of the fixing device 1 is improved, and the structure can be stably supported.

  Hereinafter, a structure fixing method using the fixing device 1 configured as described above will be described.

  First, as a preparation stage, a support plate 7 having a through-hole 7b and a tube-shaped sheath tube 8 are prepared. Specifically, the sheath tube 8 penetrates the bearing plate 7 through the through hole 7b, and the sheath tube 8 is welded to the bearing plate 7 with the upper portion of the sheath tube 8 protruding above the bearing plate 7. Prepare. In the present embodiment, the structure connecting portion 9 is further coupled to the bearing plate 7 by welding or the like, thereby preparing the bearing plate assembly 3 in which the bearing plate 7, the sheath tube 8 and the structure connecting portion 9 are integrated. To do.

  Next, as shown in FIGS. 6A and 6B, the main anchor 2 is driven into the ground G. At this time, the main anchor 2 has the ground G so that the second end 5b on the upper side of the pipe anchor 5 protrudes above the ground G with the first end 5a of the pipe anchor 5 on the lower side. Be driven into.

  Next, as shown in FIGS. 7A and 7B, the bearing plate 7 is installed on the ground G and the sheath tube 8 is placed on the outer periphery of the second end portion 5b on the upper side of the pipe anchor 5 on the main anchor 2 side. Fit. At this time, as shown in FIGS. 1 and 2, the bearing plate 7 has a direction in which the bearing plate 7 extends (the same direction as the direction D) and the tensile direction T of the wire W connected to the structure coincide with each other. Directed to.

  7 (a) and 7 (b), the portion of the sheath tube 8 that protrudes above the bearing plate 7 is connected to the main anchor 2 by the bolt 11 and the nut 12 that constitute the anchor connecting portion 18. Connect to the upper edge. Specifically, the bolt 11 passes through the through hole 5 c formed in the second end portion 5 b on the upper side of the pipe anchor 5 and the through hole 8 a formed in the upper part of the sheath tube 8. The sheath tube 8 and the second end portion 5b of the pipe anchor 5 are connected by being screwed to the tip.

  Next, as shown in FIGS. 8A and 8B, the auxiliary anchor 4 is driven into the ground G while being connected to the bearing plate 7 at a position separated from the main anchor 2. Specifically, the rod-like anchor 16 of the auxiliary anchor 4 is driven into the ground G while passing through a through hole 7d (see FIGS. 3 and 8) partially opened in the end face 7e of the bearing plate 7. At this time, the blades 17 of the auxiliary anchor 4 are embedded in the ground G while abutting against the end surface 7 e of the bearing plate 7.

  Thereafter, the structure is connected to the bearing plate 7. Specifically, by connecting a linear body such as a wire W connected to a structure such as a fence to the shackle 14 (see FIG. 1) of the structure connecting portion 9, the structure can be connected to the bearing plate 7. Complete.

  In the above structure fixing method, the step of driving the main anchor 2 into the ground G and the step of installing the bearing plate 7 on the ground G and fitting the sheath tube 8 to the outer periphery of the main anchor 2 are performed separately. Therefore, driving of the main anchor 2 and installation of the bearing plate 7 can be performed easily, and the risk of damage and deformation of the bearing plate 7 and the sheath tube 8 can be reduced. Moreover, after these steps, the main anchor 2 and the sheath tube are connected by connecting the sheath tube 8 to the upper end portion of the main anchor 2 (that is, the second end portion 5b of the pipe anchor 5) by the anchor connecting portion 18. Since 8 and the bearing plate 7 are integrally coupled, it is possible to obtain the fixing device 1 having high rigidity by simple construction.

  In the structure fixing method described above, the auxiliary anchor 4 is driven into the ground G while being connected to the bearing plate 7 at a position spaced from the main anchor 2. Thereby, it is possible to easily drive the auxiliary anchor 4 into the ground G and connect it to the bearing plate 7 while avoiding interference with the main anchor 2.

  Although the fixing device 1 is connected to a structure fixed to the ground G via a linear body such as a wire W, the present invention is not limited to this. The fixing device of the present invention may have a configuration capable of directly fixing a member such as a column constituting the structure.

  For example, the fixing device 21 shown in FIGS. 9 to 10 includes a structure connecting portion 22 that can be connected to a support column 32 constituting the rock fall prevention fence 31 shown in FIGS. The structure connection part 22 has a pair of vertical plates 23 connected to the support column 32 and a cable connection part 24 that can be connected to the lower cable 34 of the rock fall prevention fence 31 shown in FIGS. The other configuration of the fixing device 21 is the same as the configuration of the fixing device 1 shown in FIGS. The structure connection part 22 is disposed on the upper surface of the bearing plate 7. Specifically, the pair of vertical plates 23 are erected on the upper surface of the pressure bearing plate 7 in a state of being separated from each other. The cable connecting portion 24 is fixed to the upper surface of the bearing plate 7 at a position away from the vertical plate 23.

  11 to 13 show a rockfall prevention fence 31 including the above-described fixing device 1 and the fixing device 21 so as to withstand a large load caused by rockfall.

  Specifically, the rock fall prevention fence 31 includes a plurality of support columns 32, one upper cable 33, one lower cable 34, a wire mesh 35 that covers the space between the support columns 32, and a mountain side from the upper end of each support column 32. The holding cable 36 extending in the direction A1 facing the side, the side cables 37 attached to the upper ends of the columns 32 positioned at both ends of the columns 32, the plurality of reinforcing cables 40 crossing each other between the columns 32, and The fixing devices 1 connected to the ends of the cables 33, 34, 36, and 37, and the fixing device 21 connected to the lower ends of the columns 32.

  The metal mesh 35 is coupled to the upper cable 33, the lower cable 34, and the reinforcing cable 40 at a plurality of locations by using a coupling member such as a coupling coil.

  Both ends 33a of the upper cable 33, both ends 34a of the lower cable 34, and the outer ends of the side cables 37 are connected to the structure connecting portion 9 of the fixing device 1 at positions away from both ends of the plurality of columns 32. It is connected. The end portion of the holding cable 36 on the mountain side A1 is connected to the structure connecting portion 9 of the fixing device 1 installed on the mountain side A1 with respect to the support column 32.

  An auxiliary wire mesh 38 is provided to cover the lower gap of the wire mesh 35, and is fixed to the ground G by a fixing bracket 39.

  The rock fall prevention fence 31 is provided on the slope, so that the fall rock falling along the slope can be received by the support column 32 and the wire mesh 35. At the same time, the cables 33, 34, and 40 connected to the support column 32 and the wire mesh 35 extend to disperse and absorb the kinetic energy of falling rocks.

  The plurality of support columns 32 are erected on the ground G at intervals in a direction orthogonal to the direction A1 facing the mountain side. The support 32 is made of H-shaped steel or the like.

  As shown in FIG. 13, the end portion of the support column 32 facing the trough side A <b> 2 is connected to the upper cable 33 connected to the upper end of the wire mesh 35 by a coupling coil or the like via the shackle 41. Further, the end portion of the upper portion of the support 32 that faces the mountain side A <b> 1 is connected to one end portion of the holding cable 36. The other end of the holding cable 36 is connected to the structure connecting portion 9 of the fixing device 1 installed on the mountain side A1 with respect to the support 32 as described above.

  The lower part of the support column 32 is fixed to the ground G via the fixing device 21 described above. Specifically, it is as follows. In the fixing device 21 shown in FIG. 13, the main anchor 2 is driven into the ground G with the first end 5 a of the pipe anchor 5 as the head, and the second end 5 b protrudes above the ground G. Is done. The bearing plate 7 is installed on the ground G, and the sheath 8 welded in a state of penetrating the bearing plate 7 is fitted on the outer periphery of the second end portion 5 b of the pipe anchor 5. The protruding portion protruding above the bearing plate 7 is connected to the second end 5 b of the pipe anchor 5 by the anchor connecting portion 18. Further, the auxiliary anchor 4 is driven into the surface G while being connected to the pressure bearing plate 7 at a position separated from the main anchor 2 in the valley-side direction A2.

  The fixing device 21 is arranged so that the pressure plate 7 extends along the vertical direction of the slope. That is, the bearing plate is arranged so that both end portions thereof face the direction of the mountain side A1 and the direction of the valley side A2. And in the position away from the structure connection part 22 in the direction of the mountain side A1, the main anchor 2 fitted with the sheath tube 8 is driven into the ground G, and away from the structure connection part 22 in the direction of the valley side A2. At the position, the auxiliary anchor 4 is driven into the ground G.

  And between the pair of vertical plates 23 of the structure connecting portion 22, with the column 32 standing upright, the lower end of the column 32 is a part of the through hole 23 a formed in the vertical plate 23 with a bolt or the like. It is fastened freely.

  The cable connecting portion 24 of the structure connecting portion 22 is connected to the lower cable 34 connected to the lower end of the wire mesh 35 by a coupling coil or the like via the shackle 41.

  In the fixing device 21 that supports the column 32 as described above, when the column 32 of the rockfall prevention fence 31 receives a large tensile force in the direction of the valley side A2 due to the rockfall, the bearing plate 7 is a pair of the structure connecting portion 22. The tensile force is received through the vertical plate 23. The bearing plate 7 also receives a tensile force in the direction of the valley A2 from the lower cable 34 coupled to the wire mesh 35 via the cable coupling portion 24 of the structure coupling portion 22. At that time, the bearing plate 7 can disperse and transmit these tensile forces over a wide range of the outer peripheral surface of the main anchor 2 with which the sheath tube 8 contacts via the sheath tube 8. As a result, even when the bearing plate 7 receives a large tensile force from the support column 32 and the lower cable 34, the sheath tube 8 and the anchor connection, which is a portion that transmits the force between the bearing plate 7 and the main anchor 2. The portion such as the portion 18 is less likely to be deformed, such as bent or recessed. As a result, the rockfall prevention fence 31 can be stably held.

  Similar to the fixing device 21 described above, in the fixing device 1 installed on the mountain side A1 of the support column 32 shown in FIG. 11, the support column 32 of the falling rock prevention fence 31 received a large tensile force in the direction of the valley side A2 due to falling rocks. Sometimes, the supporting plate 7 of FIG. 1 receives the tensile force through the holding cable 36 connected to the upper portion of the support column 32 and the structure connecting portion 9 connected thereto. At that time, the bearing plate 7 can disperse and transmit these tensile forces over a wide range of the outer peripheral surface of the main anchor 2 with which the sheath tube 8 contacts via the sheath tube 8. As a result, even when the bearing plate 7 receives a large tensile force from the holding cable 36, the sheath tube 8 and the anchor connecting portion 18, etc., are portions that transmit force between the bearing plate 7 and the main anchor 2. This portion reduces the possibility of deformation such as bending and dents. As a result, the rockfall prevention fence 31 can be stably held.

  In addition, the fixing device 1 installed on both ends of the row of the plurality of columns 32 shown in FIGS. 11 to 12 can achieve the same effect as the fixing device 1 installed on the mountain side A1 of the column 32 described above. Is possible.

(Modification)
In the above embodiment, the wing main anchor 2 (anchor of the present invention) and the auxiliary anchor 4 are provided with one plate-like blades 6 and 17 as an example of the protrusions of the anchor and the auxiliary anchor of the present invention. Although described above, the present invention is not limited to this. The protrusion part of this invention should just be a shape which protrudes from the outer peripheral surface of an anchor main body to the outer side of the said anchor main body. Therefore, the protrusion of the present invention may have, for example, a shape that extends in a cross shape or radially outward from the outer peripheral surface of the anchor body.

1,21 Fixing device 2 Main anchor (anchor)
4 Auxiliary Anchor 5 Pipe Anchor 5a First End 5b Second End 6, 17 Blade (Protrusion)
7 Supporting Plate 7a Body Part 7b Through Hole 7c Bent Part 8 Sheath Pipe 9, 22 Structure Connection Part 18 Anchor Connection Part 16 Rod Anchor 31 Falling Stone Prevention Fence 32 Post 35 Wire Mesh

Claims (12)

A fixing device for fixing a structure to the ground,
A first end having a shape capable of being driven into the ground, and an anchor having a second end opposite to the first end;
A sheath tube having an inner diameter larger than the outer diameter of the second end of the anchor, and arranged so as to cover the outer periphery of the second end;
A bearing plate arranged along the ground, the bearing plate having a through hole having an inner diameter larger than the outer diameter of the sheath tube;
A structure connecting portion fixed to the bearing plate and having a structure connectable to the structure;
An anchor connecting portion that connects the sheath tube and the second end of the anchor;
The sheath pipe is welded to the bearing plate in a state where the sheath plate penetrates the bearing plate through the through hole and the upper portion of the sheath pipe protrudes above the bearing plate.
The portion of the sheath tube that protrudes above the bearing plate is connected to the second end portion of the anchor by the anchor connecting portion.
A fixing device characterized by that. The anchor protrudes from the outer peripheral surface of the anchor body to the outside of the anchor body between the anchor body having the first end and the second end, and between the first end and the second end. And a protruding portion to be
The fixing device according to claim 1. The protruding portion protrudes from the outer peripheral surface of the anchor main body in a direction inclined with respect to the direction from the anchor main body toward the structure connecting portion.
The fixing device according to claim 2. The protruding portion is disposed at a position below a portion connected to the sheath tube at the second end of the anchor body.
The fixing device according to claim 1. The bearing plate includes a main body part that abuts on the ground, and a bent part that is bent at an edge extending in a direction in which the sheath pipe and the structure connecting part that penetrate the through hole are arranged in the edge of the main body part. Have
The fixing device according to any one of claims 1 to 4. The bent portion faces the lower side of the bearing plate,
The fixing device according to claim 5. An auxiliary anchor connected to the bearing plate at a position spaced from the anchor;
The fixing device according to any one of claims 1 to 6. The bearing plate has a shape extending in a direction in which the sheath pipe and the structure connecting portion that penetrate the through hole are arranged,
The auxiliary anchor is connected to the bearing plate at a position opposite to the sheath tube in the structure connecting portion.
The fixing device according to claim 7. The auxiliary anchor has a long anchor main body and a protruding portion that protrudes from the outer peripheral surface of the anchor main body to the outside of the anchor main body.
The fixing device according to claim 7 or 8. The protruding portion protrudes from the outer peripheral surface of the anchor body in a direction inclined with respect to the direction from the auxiliary anchor toward the structure connecting portion.
The fixing device according to claim 9. A structure fixing method for fixing a structure to the ground,
A step of preparing a pipe-shaped sheath tube that is welded to the bearing plate in such a manner that the sheath plate penetrates the bearing plate through a through hole formed in the bearing plate and the upper portion of the sheath tube protrudes above the bearing plate. When,
Driving the anchor into the ground so that its upper end protrudes above the ground;
Installing the bearing plate on the ground and fitting the sheath tube to the outer periphery of the upper end of the anchor;
Connecting the portion of the sheath tube protruding above the bearing plate to the upper end of the anchor;
Connecting the structure to the bearing plate, and a method for fixing the structure. Further comprising the step of driving the auxiliary anchor into the ground while being connected to the bearing plate at a position spaced from the anchor.
The method for fixing a structure according to claim 11.

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