JP2009041348A - Pressure receiving device for anchor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a usable pressure receiving device for an anchor, which can simply and easily obtain rigidity necessary for a pressure receiving function on the basis of a simple constitution, which is also effective for an improvement in construction characteristics, brought about by weight reduction, and which can be simply and easily used as a planar slope stabilizing means by a combination of the individual pressure receiving devices for the anchor. <P>SOLUTION: Arm portions 7, which are radially elongated around an inserting portion of an anchor member positioned in the approximately central portion of the pressure receiving device 1 for the anchor, are provided. The arm portion 7 employs a skeleton structure which is composed of upper and lower rod-like members 8 and 9 installed at a vertical interval, and a rod-like interval maintaining member arranged in a corrugated shape between the upper and lower rod-like members 8 and 9. The arm portions 7 are connected in a direct manner or via an intermediate member to the pressure receiving devices 1 adjoining each other via an end of at least either of the upper and lower rod-like members 8 and 9. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a pressure receiving device for an anchor used for stabilizing a slope such as a natural ground. That is, the present invention relates to an anchor pressure-receiving device that transmits a tensile force acting on an anchor member composed of a rock bolt, an PC curtain wire, a PC steel strand, an uncurtain dong using a deformed PC steel rod or the like to the ground side.

With respect to this type of anchor pressure receiving device, an arm portion that extends radially around the insertion portion of the anchor member is formed of a saddle-like structure so as to be easily adapted to the unevenness of the construction surface (Patent Document) 1). However, in the case of this prior art, although it is excellent in the adaptability with respect to the unevenness | corrugation of a construction surface, there existed a problem in the point of the function which transmits the tensile force which acts on an anchor member to the ground side. That is, since the bowl-shaped structure has flexibility to adapt to the unevenness of the construction surface, bending deformation occurs in the bowl-shaped structure in the process in which the tensile force acting on the anchor member is transmitted to the ground side. The problem is that the pressure receiving device receives a lot of pressure from the ground side at the center side of the arm part, the transmission force weakens as it goes to the tip side, and the function as a pressure receiving device that receives pressure from the entire arm part against the ground side is impaired. was there.
Japanese Patent No. 2903462

  Incidentally, in order to reinforce the function as a pressure receiving device in the prior art, there is a method of filling heavy objects such as mortar, crushed stone, gravel, etc. into the cage structure, On the other hand, there is another problem that not only the filling of the vegetation base material into the cage structure but also the workability is lowered. Furthermore, in the case of a bowl-shaped structure, not only is the structure complicated and laborious processing is required, but also the weight increases and the construction handling is cumbersome, resulting in high costs. .

  The present invention has been developed in view of the above-described conventional technical situation, and the rigidity required for the pressure receiving function can be easily obtained based on a simpler configuration, and the workability can be improved by reducing the weight. It is an object of the present invention to provide an anchor pressure receiving device that is effective and easy to use and can be used simply as a planar slope stabilization means by combining individual anchor pressure receiving devices.

  In order to solve the above-described problem, in the invention of claim 1, the insertion portion of the anchor member is provided at a substantially central portion, and an arm portion that extends in the radial direction about the insertion portion of the anchor member is provided. Adopting a skeleton structure composed of an upper bar member and a lower bar member installed at intervals in the vertical direction, and a bar interval holding member disposed in a wave shape between the upper and lower bar members, and at least It is configured so that adjacent pressure receiving devices can be connected to each other directly or through an intermediate member through one end of the upper bar-shaped member or lower bar-shaped member, and the adjacent pressure receiving devices for anchors are connected to each other. The technical means of using as a slope stabilization means was adopted. A corrugated rod member bent into a corrugated shape is used as the rod-shaped interval holding member, and the upper rod member and the lower rod member are alternately connected at the folded vertex portion of the corrugated rod member. Good (claim 2). It is also possible to form a male screw at least at one end of the upper bar-like member or the lower bar-like member and to screw together adjacent pressure receiving devices via the male screw (claims). Item 3).

According to the present invention, the following effects can be obtained.
(1) In the present invention, with respect to the arm portion extending in the radial direction, the upper bar member and the lower bar member that are installed with an interval in the vertical direction, and the bar interval disposed in a wave shape between the upper and lower bar members. Since the framework structure composed of the combination with the holding member is adopted, the rigidity of the arm portion can be effectively increased. As a result, it is possible to accurately share the pressure receiving action up to the tip of each arm, and the pressure receiving action is not biased to the base of each arm as in the prior art, realizing a good pressure receiving function throughout the device. can do.
(2) In addition, since the adjacent pressure receiving devices can be connected to each other through at least one end of the upper bar member or the lower bar member, the adjacent anchor pressure receiving devices are connected to each other to form a plane slope. The workability when forming the stabilizing means is very good, and the individual pressure receiving devices for anchors can be easily and accurately arranged in a predetermined positional relationship.
(3) In addition, it is possible to reduce the weight by adopting a frame structure composed of rod-shaped members, and it is very effective for improving workability from this point of view because it is easy to hold in a rod shape.
(4) Furthermore, since a frame structure consisting of rod-shaped members is adopted, the entanglement of the roots of plants with respect to each component member is good, integration of the pressure receiving device and the ground is promoted, and a natural landscape is more enhanced. Can be effectively maintained.

  The present invention includes an arm portion extending in a radial direction centering on an insertion portion of an anchor member installed in a substantially central portion, and connecting adjacent pressure receiving devices for anchors via these arm portions to form a planar slope As long as it is used as a stabilizing means, it can be widely applied. With regard to the number and arrangement of the arm portions, the cross is provided with four arm portions, the adjacent pressure receiving devices for anchors are connected in a lattice shape, and the Y arm shape is provided with three arm portions, Various forms are possible, such as a form in which adjacent pressure-receiving devices for anchors are connected in a honeycomb shape, or a form in which arm portions are provided on both sides around the insertion part of the anchor member and connected in a straight line. In addition, regarding the connection method of the anchor pressure receiving device according to the present invention, the arms of the adjacent anchor pressure receiving devices may be directly connected to each other, or may be connected with an intermediate member interposed therebetween. Good. In short, what is necessary is just to connect adjacent pressure-receiving devices through at least one end of the upper bar member or the lower bar member. Incidentally, as a usage pattern of the anchor pressure receiving device according to the present invention, a configuration in which the adjacent anchor pressure receiving devices are used in an installed state is the most common usage mode, but the anchor in the continuous state is used. It is also possible to form a frame by spraying or placing concrete or mortar on the pressure receiving device. In the case of the latter form of use, after the arm portion of the anchor pressure receiving device is finally fixed with concrete or the like, the utility as a truss-like frame structure is not so much, but in the reverse winding method, etc. In the frame installation work until the installation of the frame, since it is possible to stably secure an accurate bearing action against the ground, it is extremely effective for the implementation of the frame installation and safety. By the way, regarding the specific arrangement of the upper and lower bar-shaped members constituting each arm part, the triangular cross-sectional arrangement formed by combining one upper bar-shaped member and two lower bar-shaped members spaced from each other. However, it is also suitable because of its high rigidity and other installation forms such as a planar arrangement form consisting of a combination of one upper bar-like member and one lower bar-like member or an arrangement form having a rectangular cross section. is there. In short, any structure may be used as long as it is composed of rod-shaped members that are spaced apart from each other in the vertical direction and the rod-shaped interval holding members are disposed in a wave shape between the members.

  Between the upper and lower bar-shaped members composed of the upper bar-shaped member and the lower bar-shaped member, the bar-shaped interval holding members are disposed in a wave shape to constitute a truss-like frame structure. As for the rod-shaped interval holding member, as described above, the corrugated rod-shaped member bent into a wave shape is used, and the upper rod-shaped member and the lower rod-shaped member are alternately arranged at the folded vertex portion of the corrugated rod-shaped member. It may be connected, or may be sequentially connected in a wave shape to the upper bar member and the lower bar member using a plurality of short linear bar members. Since the arm portion of the pressure receiving device according to the present invention employs a truss-like framework structure, the bending load and shear load acting on each part of the rod-like member are greatly reduced, so the tensile strength of the member In addition, it is possible to effectively utilize the compression strength and to obtain a higher rigidity in a simple manner, and it is also effective for reducing the weight of the apparatus and reducing the cost. Incidentally, the specific shape of the corrugated rod-like member may be a linear shape that changes in a folding manner at each folded vertex portion, or may change in a curved shape at each folded vertex portion. Of course, the specific inclination angle of the inclined portion of the rod-like interval holding member disposed in a wave shape between the upper and lower rod-like members can be freely set depending on the case. In addition, regarding the end portion on the center portion side of the rod-shaped interval holding member, that is, the insertion portion side of the anchor member, it may be configured such that a downwardly inclined portion comes, or an upward inclined portion comes. It may be configured. Furthermore, if the lower rod-shaped members are connected to each other by an appropriate member such as a plate material or a corrugated rod-shaped member, the expansion between the lower rod-shaped members can be easily prevented. In this case, if the lower bar members are connected to each other by a plate material, the pressure receiving function can be improved at the same time. Further, the plate member may partially connect the lower bar-shaped members, but the lower bar-shaped members are integrally extended radially from the lower plate of the central portion corresponding to each arm portion. If it connects with a board | plate material, the whole pressure receiving apparatus can be comprised integrally, and it is effective also in the improvement of pressure receiving strength and workability. The material of the upper and lower rod-like members and the rod-like interval holding members that connect the rod-like members are not limited to those made of metal such as steel as long as they have sufficient strength for the pressure receiving function. Alternatively, a synthetic resin or the like is also possible.

  FIG. 1 is a construction state diagram showing the installation state of each anchor pressure receiving device according to the present invention in one-side cross section, and FIG. 2 is a partially enlarged view showing an enlarged central portion thereof. As shown in the figure, each anchor pressure receiving device 1 includes an insertion portion 3 of an anchor member 2 at a substantially central portion thereof. This embodiment shows a case where a lock bolt is used as the anchor member 2, and an insertion tube 4 having a rectangular tube shape or a cylindrical shape into which the lock bolt can be inserted as shown in FIG. The insertion portion 3 of the anchor member 2 is constituted by the upper plate 5 and the lower plate 6 which are fixed to the upper and lower end portions by welding or the like. Further, an appropriate number of arm portions 7 extending in the radial direction around the insertion portion 3 are provided outside the insertion portion 3 of the anchor member 2, and an appropriate number extending in the radial direction with the insertion portion 3 of the anchor member 2. The arm receiving portion 7 constitutes the anchor pressure receiving device 1. And in each arm part 7, the upper bar-shaped member 8 to which the inner end part side was fixed to the upper board 5 by welding etc., and the lower bar shape to which the inner end part side was fixed to the lower board 6 by welding etc. A skeleton composed of rod-like members using a rod-like interval holding member comprising a corrugated rod-like member 10 that is bent in a wave shape in this embodiment, which connects the member 9 and the upper and lower rod-like members 8, 9. Structure is adopted.

  Therefore, when installing each of the anchor pressure receiving devices 1, the anchor pressure receiving device 1 as a whole is lowered with respect to the head exposed on the ground of the anchor member 2 fixed on the ground 11 side, and the anchor member 2 Is inserted into an insertion hole concentric with the insertion tube 4 formed in the lower plate 6, and the lower connecting plate of the lower bar-shaped member 9 constituting the lower plate 6 and the arm portion 7 is ground as shown in the figure. The anchor pressure receiving device 1 is placed at a predetermined position on the ground 11 so as to contact the 11 side. Incidentally, in the work of placing the anchor pressure receiving device 1 on the ground 11, each arm portion 7 is fixed to the insertion portion 3 in advance in a factory or the like, and is then carried to the site and placed on the ground of the anchor member 2. Although it is a normal work procedure to install externally to the exposed head, only the insertion portion 3 composed of the insertion tube 4, the upper plate 5, and the lower plate 6 is exposed to the ground of the anchor member 2. A work procedure is also possible in which each arm portion 7 is fixed to the insertion portion 3 after being externally fitted to the portion. After the placement work of the individual anchor pressure receiving devices 1 on the ground 11 is completed, the upper plate 5 is attached to the upper plate 5 as shown in the figure before or after the connection work between the adjacent arm portions 7. In this embodiment, a nut 12 with a spherical washer is screwed onto the head of the anchor member 2 exposed upward through the formed insertion hole, and the spherical washer 13 placed on the upper plate 5 is screwed. By tightening and fixing, a tensile force is applied to the lock bolt as the anchor member 2 and the desired tension state is maintained. Thereafter, a rust prevention cap 14 is installed on the head of the anchor member 2 and a rust prevention treatment is performed by filling the interior with rust prevention oil. Further, before and after the tightening and fixing work of the anchor member 2 with the nut 12 or the rust prevention work with the rust prevention cap 14, a greening base material or the like is sprayed on the arm portion 7 or its surroundings as necessary. By supplying, the installation work of the anchor pressure receiving device 1 is completed. Incidentally, if the anchor pressure receiving device 1 as a whole after installation is covered with a porous material such as a mesh material, the greening base material and the like can be more stably fixed. It is also possible to form a frame by spraying or driving concrete, mortar or the like on the arm portion 7 of the connected anchor pressure receiving device 1 or other necessary portions.

  FIG. 3 is a plan view showing the entirety of an embodiment relating to each anchor pressure receiving device, and FIG. 4 is a front view thereof. 5 is a partially enlarged view showing the arm portion 7, FIG. 6 is a left side view, and FIG. 7 is a partial perspective view. As shown in FIGS. 3 and 4, each anchor pressure receiving device 1 according to this embodiment includes four arm portions 7 a to 7 d in a cross shape with the insertion portion 3 of the anchor member 2 as the center. Showed the case. In each of the arms 7a to 7d, as shown in FIGS. 5 to 7, a combination of one upper bar member 8 and two lower bar members 9a and 9b separated from each other is adopted. In addition, a bar-shaped interval holding member made of a corrugated bar-shaped member 10 formed by bending the upper bar-shaped member 8 and the lower bar-shaped member 9a and between the upper bar-shaped member 8 and the lower bar-shaped member 9b into a wave shape is provided. It has a feature in that it adopts a truss-like rod-like frame structure that connects together. That is, the upper bar member 8 and the lower bar member 9a are alternately connected to the upper bar member 8 or the lower bar members 9a, 9b at the folded vertex portions of the corrugated bar member 10 formed into a wave shape. , 9b is formed as a truss-like frame structure having a triangular cross section, and the bending load and shear load acting on each intermediate portion between the folded vertices of the corrugated rod-shaped member 10 are greatly reduced. It is configured so that the tensile strength and compressive strength of can be utilized to the maximum. Therefore, in the case of the present embodiment, higher rigidity can be obtained effectively and easily, and it is extremely effective in reducing the weight and cost. The positions of the outer end portions of the upper bar member 8 and the lower bar members 9a and 9b are aligned, and when the adjacent arm portions 7 are connected to each other, the outer end portions can be brought into contact with each other. ing.

  Incidentally, in the said Example, although it comprised so that the part inclined upwards might come to the edge part by the side of the insertion part 3 of the wave-like rod-shaped member 10, as shown in FIG. It is also possible to configure. Further, as shown in FIGS. 3 and 4, if necessary, the lower rod-like members 9a and 9b of the arm portions 7a to 7d are connected to each other by connecting plates 15a to 15d made of a plate material. While being able to prevent the lower rod-like members 9a and 9b from expanding, the pressure receiving function for the ground side can be improved. In addition, in connection board 15a-15d of a present Example, the case where it extended integrally radially from the lower plate 6 of the center part corresponding to each arm part 7a-7d was shown. According to this structure, the whole pressure receiving apparatus can be comprised integrally, and it is effective also in the improvement of pressure receiving strength and workability. Moreover, in the said Example, although the four arm parts 7a-7d were manufactured separately and each was fixed with respect to the penetration part 3, the case where an arm part was installed in the cross shape was shown, A straight arm with a length of one minute is bent into an L-shape, and the two units bent in the L-shape are used to fix the insertion portion 3 in a cross-like manner. Thus, it is possible to install the arm portion in a cross shape as a whole. Furthermore, it is also possible to configure the arm portions 7a to 7d by vertically nesting units composed of the upper bar-shaped member 8, the lower bar-shaped members 9a and 9b, and the corrugated bar-shaped member 10, thereby further increasing the rigidity. It is possible to increase.

  8 is a plan view showing a state in which adjacent pressure receiving devices for anchors are connected to each other, FIG. 9 is an enlarged partial view showing the connecting portion, and FIG. 10 is a method for spraying or placing concrete or mortar. It is sectional drawing which showed the case where a method frame was formed. As shown in FIG. 8, in this embodiment, the pressure receiving structures arranged in a lattice shape by connecting the arm portions 7 of the individual pressure receiving devices 1 for anchors having adjacent cross shapes at the connecting portion 16. The case of forming was shown. In the connecting portion 16, as shown in FIG. 9, the rod-like connecting members 17 to 19 are moved in a state where the ends of the upper rod-like member 8 and the lower rod-like member 9 constituting each arm portion 7 are abutted with each other. In addition, a connection form in which the adjacent pressure receiving devices 1 for anchors are connected to each other by being fastened by the wire 20 or the like is employed. Thus, as shown in FIG. 8, it goes without saying that the anchor pressure receiving devices 1 can be used as a planar pressure receiving structure in an installed state in which the anchor pressure receiving devices 1 are connected in a lattice shape. Further, after the installation work of the anchor pressure receiving device 1 and the connection work of the arm portions 7 are finished, as shown in FIG. 10, a hardening material 21 such as concrete or mortar is supplied to each arm portion 7 and the like to form a triangle. It is also possible to form a method frame having an appropriate cross-sectional shape such as a trapezoid or the like. As described above, in the case of the latter use form, in the framework installation work until placing concrete or the like in the reverse winding method or the like, it is possible to stably secure an accurate bearing effect on the ground. It is extremely effective for the implementation of the frame installation work and safety. Note that a mesh member (not shown) may be further provided on the outside of the arm portion 7 with a space therebetween, and the inside of the mesh member may be filled with a hardening material 21 such as concrete or mortar.

  FIG. 11 is a front view showing another embodiment relating to a connecting portion for connecting adjacent arm portions, and FIG. 12 is a partially enlarged view showing an enlarged main portion thereof. As shown in the figure, in this embodiment, a screw rebar 22 having a male screw formed on the outer peripheral portion is adopted as an upper bar-shaped member constituting the arm portion 7 of each adjacent anchor pressure receiving device 1, and those adjacent screws are used. The case where it comprised so that the arm parts of the adjacent pressure-receiving apparatus 1 for anchors might be screwed together using the coupling member 23 which formed the internal thread which can be screwed with the male thread of the rebar 22 inside was shown. Is. Incidentally, regarding the form of screw connection between the screw rebar 22 and the coupling member 23, the male screws formed on the screw rebar 22 of the anchor pressure receiving device 1 are all set in the same direction, and the connection member 23 is previously set to one screw. Both screw rebars which are screwed together in a state where they are moved to the rebar 22 side and are engaged with each other when the arm portions of the adjacent pressure receiving devices 1 for anchoring are screwed together. The connection form which moves to the position straddling 22 and connects both is possible. In addition, it is also possible to employ a configuration in which the male screw of the screw rebar 22 is reverse in the direction of the adjacent anchor pressure receiving device 1, and the screw rebar 22 on both sides is attracted by the rotation of the connecting member 23. However, in this case, it is necessary to complete the screw coupling work between the screw rebar 22 and the coupling member 23 before fixing the anchor pressure receiving device 1. As described above, if the adjacent anchor pressure receiving devices 1 are configured so as to be screwed together, the fastening work by the wire 20 can be omitted, which is effective in improving workability. In addition, although the case where the adjacent screw reinforcement 22 was directly connected was demonstrated above, the connection form which interposes another intermediate member between screw reinforcement 22 as needed is also possible. Needless to say, a member in which another male screw is formed instead of the screw rebar 22 can be adopted.

  13 and 14 are plan views showing another embodiment relating to the anchor pressure receiving device. The anchor pressure receiving device 24 shown in FIG. 13 is intended to reinforce the hunch by connecting and connecting the connecting members 25 between the lower rod-like members 9 of the arms 7a to 7d. Various modifications can be made to the specific configuration of the connecting member 25. Further, in the anchor pressure receiving device 26 shown in FIG. 14, three arm portions 28a to 28c are arranged radially around the insertion portion 27 of the anchor member, so that these arm portions 28a to 28c are Y-shaped. The case where it arrange | positions in a shape is shown. When the anchor pressure receiving device 26 in which the arm portions 28a to 28c are arranged in a Y shape is adopted, the anchor pressure receiving device 26 installed adjacent to the arm portions 28a to 28c via the arm portions 28a to 28c is appropriately set. By connecting with the intermediate member interposed therebetween, it is possible to easily form the pressure receiving structure and the method frame arranged in a honeycomb shape. In the present embodiment, the case where circular shapes are used as the upper plate 29 and the lower plate 30 constituting the insertion portion 27 is shown, but it is needless to say that the deformation is possible. As described above, the number of arm portions constituting the anchor pressure receiving device can be increased or decreased as long as it is arranged radially around the insertion portion of the anchor member. For example, straight lines are provided on both sides of the insertion portion. It is also possible to have two arms extending in the same manner.

Next, an excellent pressure receiving function unique to the anchor pressure receiving device according to the present invention will be described based on the experimental results shown in FIGS. In this experiment, the anchor pressure receiving device 1 shown in FIGS. 3 to 7 is used as a specimen related to the anchor pressure receiving device according to the present invention, and the anchor member 2 located on the sand ground and inserted in the center is inserted. The load side of the center hole jack is set with the load cell sandwiched between the parts 3 and the displacement of the lower plate 6 located in the center part and the arms 7a to 7d while gradually increasing the load from above. The displacement of each tip is measured with a displacement meter, and at the same time, strain gauges are applied to the inclined portions R _{1 to} R ₅ (see FIG. 5) of the corrugated rod-shaped member 10 used for the arm portions 7 for example 7a and 7b. It was set and the magnitude of distortion at each loading was measured. In addition, a conventional example using a rectangular porous board was placed on a sand ground as a comparative example, and a similar loading experiment was performed, and the displacement at the center and the displacement at the periphery were measured. FIG. 15 is a load-displacement relation diagram regarding the anchor pressure-receiving device 1 according to the present invention and the central portion of the conventional example created based on the experimental results obtained by the load test described above, and FIG. 16 is an arm portion 7a to 7 according to the present invention. 7d shows a load-displacement relationship diagram regarding each tip portion of 7d and the peripheral portion of the conventional example. The solid line (A) is the anchor pressure receiving device 1 according to the present invention, and the broken line (B) is the conventional example. The case is shown. FIG. 17 shows a load-strain relationship diagram of the inclined portions R _{1 to} R ₅ (see FIG. 5) of the arm portions 7 a to 7 d according to the present invention.

  15 and FIG. 16 are compared, and by comparing the displacement, that is, the manner of deformation that occurs in the central portion of the anchor pressure receiving device 1 and the tip of the arm portion 7, or in the central portion and the peripheral portion of the conventional example, The pressure receiving state in each of these parts can be estimated. That is, if the broken line (B) in FIG.15 and FIG.16 is contrasted, in the case of the prior art example which used the square porous board body, it follows the increase of load in the center part, and it follows the direction of the load. It can be seen that the amount of displacement tends to increase, while the periphery tends to displace in the opposite direction. In other words, in the case of the above-described conventional example using a rectangular porous disc body, the center portion is sunk into the sand ground by a load and displaced in the load direction, that is, downward, but in the peripheral portion, it escapes in the opposite direction, that is, upward. It turns out that there is a tendency. Thereby, in the case of the said prior art example, it is estimated that a pressure receiving action concentrates on a center part, and a pressure receiving action is not functioning correctly in a peripheral part. Even in the case of this conventional example, it is possible to enhance the pressure receiving action in the peripheral part by increasing the thickness of the constituent members to increase the strength, but the workability due to the increase in cost and weight is also possible. Another problem will occur, such as a drop in

In the case of the anchor pressure receiving device 1 according to the present invention, the solid line (A) in FIG. 15 and FIG. In addition, the tendency of displacement at the center portion and the tendency of displacement at the tip portions of the respective arm portions 7a to 7d substantially coincide with each other, indicating a similar load-displacement relationship. That is, due to the load loaded on the insertion portion of the anchor member located in the central portion of the device, the direction of the load follows the increase in the load at the central portion and at the distal ends of the arms 7a to 7d. In other words, it can be seen that it is displaced downward and sinks into the sand ground. Thus, in the case of the anchor pressure receiving device according to the present invention, it is presumed that the pressure receiving action is accurately maintained both in the central portion and in the distal end portion of each arm portion. And this point is the characteristic peculiar to the anchor pressure receiving device according to the present invention, and it is obvious that this is the effect of adopting the truss-like frame structure as the frame structure of each arm part. Incidentally, as shown in the load-strain relationship diagram of FIG. 17, each of the inclined portions R _{1 to} R ₅ of the arm portions 7 a to 7 d according to the present invention has strain or compression in the tensile direction according to their inclination directions. It can be seen that directional distortion occurs, and the magnitude of the distortion decreases from the central portion close to the loading position toward the tip portion.

It is the construction state figure which showed the installation state of each pressure receiving apparatus for anchors which concerns on this invention with the one-side cross section. It is the elements on larger scale which expanded and showed the center part of the pressure receiver for anchors. It is the top view which showed the Example regarding each pressure receiving apparatus for anchors. It is the front view which showed the same Example. It is the elements on larger scale which showed the arm part. It is the left view which showed the same arm part. It is the fragmentary perspective view which showed the same arm part. It is the top view which showed the state which connected adjacent pressure receiving apparatuses for anchors. It is the elements on larger scale which expanded and showed the connection part of the pressure receiving apparatuses for anchors. It is sectional drawing which showed the case where concrete or a mortar was sprayed thru | or laid and a method frame was formed. It is the front view which showed the other Example regarding the connection part which connects adjacent arm parts. It is the elements on larger scale which expanded and showed the principal part of the Example. It is the top view which showed the other Example regarding the pressure receiving apparatus for each anchor. It is the top view which showed the other Example regarding the pressure receiving apparatus for each anchor. It is a load-displacement relationship figure regarding the center part of the pressure receiver for anchors which concerns on this invention, and a prior art example. It is a load-displacement relationship figure regarding each front-end | tip part of the arm part of the pressure receiving apparatus for anchors which concerns on this invention, and the peripheral part of a prior art example. Load of the inclined portions R ₁ to R ₅ which constitute the arms of the anchor for receiving device according to the present invention - is the strain relationship diagram.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Anchor pressure receiving device, 2 ... Anchor member, 3 ... Insertion part, 4 ... Insertion pipe, 5 ... Upper plate, 6 ... Lower plate, 7 ... Arm part, 8 ... Upper rod-shaped member, 9 ... Lower rod-shaped member, 10 DESCRIPTION OF SYMBOLS ... Corrugated rod-shaped member, 11 ... Ground, 12 ... Nut, 13 ... Spherical washer, 14 ... Rust prevention cap, 15 ... Connecting plate, 16 ... Connecting part, 17-19 ... Rod-shaped connecting member, 20 ... Number wire, 21 ... Hardening material , 22 ... Screw rebar, 23 ... Connecting member, 24 ... Anchor pressure receiving device, 25 ... Connecting member, 26 ... Anchor pressure receiving device, 27 ... Inserting portion, 28 ... Arm portion, 29 ... Upper plate, 30 ... Lower plate

Claims (3)

  An anchor member insertion portion is provided at a substantially central portion, and an arm portion extending in a radial direction around the insertion portion of the anchor member is provided, and the arm portion is an upper rod-like member installed at intervals in the vertical direction; Adopting a skeleton structure composed of a lower bar-shaped member and a bar-shaped interval holding member disposed in a wave shape between the upper and lower bar-shaped members, and at least one end of the upper bar-shaped member or the lower bar-shaped member A pressure receiving device for an anchor, which is configured to connect adjacent pressure receiving devices directly or via an intermediate member.   The corrugated rod-like member bent into a wave shape is used as the rod-like interval holding member, and the upper rod-like member and the lower rod-like member are alternately connected at the folded vertex portion of the corrugated rod-like member. Item 2. The pressure receiving device for anchor according to Item 1.   A male screw is formed at least at one end of the upper bar member or the lower bar member, and adjacent pressure receiving devices can be screwed together via the male screw. Or the pressure receiving apparatus for anchors of 2.

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