JP4825069B2 - Anchor pressure receiving device - Google Patents

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 regard to this type of anchor pressure receiving device, the arm portion extending radially around the insertion portion of the anchor member is made of steel material having an inverted T-shaped cross section, and the nets and the like are connected via diagonal materials installed on the inverted T-shaped steel material. By mounting and filling with a filling base material such as a greening base material, a greening base material or the like is filled into the triangular internal space formed by the inverted T-shaped steel materials or nets, and the pressure receiving device is The thing which plans greening of a slope including it is known (patent document 1). However, in the case of this conventional technology, although it is excellent in that the rigidity can be strengthened by adopting the inverted T-shaped steel material, a construction is adopted in which a diagonal material is installed on the inverted T-shaped steel material and a net is attached. Therefore, there is a problem that not only the structure becomes complicated and the workability is lowered, but also the cost is high. In addition, since the internal space having a triangular cross section is partitioned by the inverted T-shaped steel material itself or the diagonal material, it is difficult to accurately fill a filling base material such as a greening base material to every corner. There was also a problem that the filled base material filled was divided to cause edge breakage, and the integration of the filled base material such as the greening base material was impaired.
Japanese Patent No. 3252131

  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 effective, and there are no obstacles to the filling in the inner space, and it is easy to accurately fill every corner of the filling substrate such as a greening substrate, and the filling substrate filled in the inner space is integrated. It is an object of the present invention to provide an anchor pressure receiving device that is easy to use and is effective in reducing costs.

In order to solve the above-mentioned problem, the invention according to claim 1 includes an anchor member insertion portion at a substantially central portion of the pressure receiving device, and an arm portion extending in a radial direction around the insertion portion of the anchor member. parts are both sides of the inclined plate portion having a plurality of openings, composed of a combination of a bottom plate portion which is disposed between these inclined plate portions, interior triangular cross-section from the space ing triangular section The technical means of adopting a frame structure was adopted. As described above, in the present invention, since the cross-sectional triangular frame structure formed by joining the inclined side plate portion on both sides and the long side portion of the bottom plate portion to the arm portion is adopted, the inclined side plate portion and the bottom plate portion on both sides thereof are adopted. As a result, the rigidity is greatly enhanced. As a result, the thickness of each plate portion can be reduced to reduce the weight, thereby improving the handleability and reducing the cost. As for the way of coupling between the plate portions, the inclined side plate portions on both sides are integrally bent along the central long side located between the inclined side plate portions, and You may comprise so that the long side part located in the other end of an inclination side board part may be joined with the said bottom board part (Claim 2).

According to the present invention, the following effects can be obtained.
(1) Since a framework structure having a triangular cross section made of a plate material is adopted as the arm portion, a large rigidity can be effectively obtained with a simple configuration.
(2) Therefore, it is possible to reduce the thickness of the inclined side plate portion and the bottom plate portion constituting the arm portion to reduce the weight, which is effective in improving workability and reducing costs.
(3) Since there are no obstacles that hinder the filling in the internal space, the filling of the filling substrate such as the greening substrate can be performed easily and accurately to every corner. Further, the conventional problem of edge cutting with respect to the filling base material by the constituent members in the internal space is solved, and the integration of the filling base material is realized.
(4) Low cost production is possible by simple sheet metal processing.
(5) By constituting the sides of the inclined plate portion to one body to bending formation, it is effective in simplifying the assembling operation of the arm.

  The present invention can be widely applied as long as it is a pressure receiving device for an anchor provided with an arm portion extending in a radial direction around an insertion portion of an anchor member installed at a substantially central portion. With regard to the number and arrangement of the arms, four sides are installed in a cross shape, three are installed in a Y shape, are installed in other polygonal positions, or both sides are centered on the insertion portion of the anchor member. Various arrangement forms such as a form in which two are installed are possible. Further, regarding the installation state of the anchor pressure receiving device according to the present invention, even in the independent installation form in which the anchor pressure receiving devices are installed in an independent state, the arms of the adjacent anchor pressure receiving devices are directly or between the intermediate members. The present invention can also be applied to a continuous installation form in which the apparatus is continuously installed with a sandwich. In particular, the latter continuous installation form is suitable for forming a frame. In that case, it may be used as it is as an intersecting portion of the frame, or it may be used in a state where a grout material is sprayed.

  With respect to the openings formed in the inclined side plate portions on both sides, it is possible to arbitrarily arrange openings having an appropriate shape and size as long as the filling base material can be filled into the internal space. In addition, the bottom plate portion may have an opening similar to that of the inclined side plate portion, or may be formed with an opening having a shape or size different from that of the inclined side plate portion, and no opening portion is provided. Forms are also possible. In particular, when the side plates on both sides are opened so that the truss-like frame remains, the bending load and shear load acting on the frame are greatly reduced. The strength can be utilized to the maximum, and high rigidity and a large opening area can be more effectively ensured, which is effective for weight reduction and cost reduction. The materials of the inclined side plate portions and the bottom plate portions on both sides are not limited to those made of metal such as steel but may be made of synthetic resin as long as they have sufficient strength for the pressure receiving function.

  FIG. 1 is a construction state diagram showing an installation state of an anchor pressure receiving device according to an embodiment of the present invention in one-side cross section, and FIG. 2 is a partially enlarged view showing an enlarged central portion thereof. 3 is a perspective view showing the arm, FIG. 4 is a front view thereof, and FIG. 5 is a side view thereof. As shown in the figure, the anchor pressure receiving device 1 includes an insertion portion 3 for the 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 a pipe-like insertion tube 4 through which the lock bolt can be inserted as shown in FIG. The upper plate 5 and the lower plate 6 fixed to the end portions by welding or the like constitute the insertion portion 3 of the anchor member 2. 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. Incidentally, regarding the number and arrangement of the arm portions 7, various installation forms such as a form in which four are installed in a cross shape and a form in which three are installed in a Y shape are possible as described above.

As shown in FIGS. 3 and 5, each arm 7 is disposed between the inclined side plate portions 9a and 9b on both sides having the opening 8 and the lower end portions of the inclined side plate portions 9a and 9b on both sides. A frame structure having a triangular cross section formed by joining the long side portions of the plate portions 9a, 9b, 10 is employed. Incidentally, in the case of the present embodiment, it is fixed by welding or the like in a state where the lower end portions of the inclined side plate portions 9a, 9b on both sides are locked to the locking portions 11a, 11b formed by bending on both sides of the bottom plate portion 10. It is configured as follows. Further, as shown in FIGS. 1 and 4, the inclined side plate portion 9 of the present embodiment shows a case where the triangular opening 8 is employed and the truss-like frame portion 12 remains. As shown in FIGS. 3 and 5, in this embodiment, the inclined side plate portions 9a and 9b on both sides are bent along the central long side portion located between the inclined side plate portions 9a and 9b. The case where it comprised so that it may be bent integrally from the part 13 was shown. In addition, as for a specific bending method in the bending portion 13, as long as it does not damage the basic structure of the triangular cross-sectional frame structure, it is bent into a circular arc shape or a rectangular cross-sectional shape. For example, an appropriate bending form is possible. Furthermore, regarding the bottom plate portion 10, the case where the intermediate portion has a convex cross section slightly protruding upward is shown. Incidentally, although the bottom plate portion 10 is not provided with an opening portion, it is needless to say that an appropriately shaped opening portion such as a long hole opening portion can be formed.

  In construction, as shown in FIGS. 1 and 2, the head is inserted into the lower plate 6 with respect to the head exposed on the ground of the anchor member 2 fixed on the ground 14 side. 4 while lowering the anchor pressure receiving device 1 as a whole so as to be inserted into the insertion hole formed concentrically with the bottom plate 6 and the bottom plate portion 10 constituting the lower plate 6 and the arm portion 7 as shown in the figure. The placement operation of the anchor pressure receiving device 1 is performed so as to come into contact with the ground 14 side. Incidentally, in the placement work on the ground 14 side of the anchor pressure receiving device 1, each arm portion 7 is fixed to the insertion portion 3 in advance in a factory or the like, and is carried to the site and exposed to the ground of the anchor member 2. Although it is a normal work procedure to install externally to the head, only the insertion portion 3 composed of the insertion tube 4, the upper plate 5 and the lower plate 6 is attached to the head exposed on 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 the outer fitting is installed.

  Then, after the placement work on the ground 14 side of the anchor pressure receiving device 1 is completed, with respect to the head of the anchor member 2 exposed upward through the insertion hole formed in the upper plate 5 as illustrated, In this embodiment, a nut 15 with a spherical washer is screwed and tightened and fixed to a spherical washer 16 installed on the upper plate 5 to apply a tensile force to the lock bolt as the anchor member 2. The desired tension will be maintained. Thereafter, a rust prevention cap 17 is installed on the head of the anchor member 2 and the inside thereof is filled with rust prevention oil, so that a rust prevention treatment is performed. Further, before and after the tightening and fixing operation of the anchor member 2 with the nut 15 or the installation operation of the rust prevention cap 17, if necessary, a filling base material such as a greening base material with respect to the arm portion 7 and its surroundings. By supplying the grouting material by spraying or the like, 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.

  FIG. 6 is a perspective view showing another embodiment of the arm portion constituting the anchor pressure receiving device according to the present invention, and FIG. 7 is a side view thereof. As shown in the drawing, the arm portion 18 according to the present embodiment employs a rectangular opening 20 as an opening formed in the inclined side plate portions 19a and 19b on both sides, as compared with the arm portion 7 according to the embodiment. The only difference is that In the case of the present embodiment, since the rectangular opening 20 is employed, simpler processing is possible in the sheet metal processing. As described above, the shape, size, number, and the like of the openings formed in the inclined side plate portions on both sides can be changed as necessary. Further, in this embodiment, the case where the flat bottom plate portion 21 is adopted as shown in FIG. 7 is shown, but the bottom plate portion having a convex cross section is adopted as in the above embodiment, or the opening having an appropriate shape is used. It goes without saying that a part may be provided.

It is the construction state figure which showed the installation state of the pressure receiving apparatus for anchors based on the Example of 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 perspective view which showed the arm part of the pressure receiving apparatus for anchors. It is the front view which showed the same arm part. It is the side view which showed the same arm part. It is the perspective view which showed the other Example regarding the arm part which comprises the pressure receiver for anchors which concerns on this invention. It is the side view which showed the same arm part.

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 ... Opening part, 9 ... Inclined side plate part, 10 ... Bottom plate part, 11 ... Locking part, 12 ... Frame part, 13 ... Bending part, 14 ... Ground, 15 ... Nut, 16 ... Spherical washer, 17 ... Rust prevention cap, 18 ... Arm part, 19 ... Inclined side plate part, 20 ... opening, 21 ... bottom plate

Claims (2)

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. The arm portion includes inclined side plate portions on both sides having a plurality of openings, and A pressure receiving device for anchors comprising a frame structure having a triangular cross section , which is composed of a combination with a bottom plate portion disposed between the inclined side plate portions, and has a triangular interior space . The inclined side plate portions on both sides are integrally bent along a central long side portion located between the inclined side plate portions, and a long side portion located on the other end of the inclined side plate portions on both sides is formed. 2. The anchor pressure receiving device according to claim 1, wherein the anchor pressure receiving device is joined to the bottom plate portion .

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