JP2012211507A - Anchor for banking strengthening soil wall and banking strengthening soil wall structure employing anchor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem in which a pull-out resistance function in an anchor for banking strengthening soil wall becomes an anchor plate only.SOLUTION: An anchor for banking strengthening soil wall comprises: one rod-like strengthening member 2 of which the front end portion is fixed to wall surface panels 20, 20a, ...; a flange-like anchor plate 3 fixed to the rod-like strengthening member 2; and one slippage suppressing plate 4 which is provided in an intermediate part of the rod-like strengthening member 2 in parallel with the rod-like strengthening member 2, includes outward protruding portions 5 and 5a from both sides of the rod-like strengthening member 2 in both side parts and is separated from the anchor plate 3. The rod-like strengthening member 2 is inserted through an insertion hole 7 in the center of the anchor plate 3, the anchor 1 for banking strengthening soil wall fixing the anchor plate 3 to the rod-like strengthening member 2 is buried in a banking part 22 while positioning the slippage suppressing plate 4 under the rod-like strengthening member 2, and the front end portion of the anchor 1 for banking strengthening soil wall is fixed to the centers of the wall surface panels 20, 20a, ..., arrayed in vertical and horizontal directions. Therefore, pull-out resistance performance of the anchor 1 for banking strengthening soil wall is improved by adding a friction resistance force of the slippage suppressing plate 4 to a support pressure resistance force of the anchor plate 3.

Description

  The present invention relates to an embankment-reinforced earth wall anchor that is connected to the back surface of a wall main body that is configured by arranging a plurality of wall panels vertically and horizontally, and embedded in the embankment on the back surface of the wall main body, and a bank-reinforced soil using the anchor. It relates to the wall structure.

Conventionally, in such embankment reinforced earth wall structure, a wall main body constituted mainly by arranging and connecting a plurality of wall panels in the vertical and horizontal directions, and a rod-shaped reinforcing material whose front end is connected to the back of the wall main body, and It is comprised by the embankment of the embankment reinforced earth wall which has an anchor plate connected with the rear-end part of this rod-shaped reinforcement, and the embankment part by which the said rod-shaped reinforcement is embed | buried under the back side of the said wall main body. Is common,
(1) A plurality of wall panels are installed in parallel on the foundation constructed on the ground, and after the primary embankment is performed on the back of the wall panels up to the mounting positions of the embankments for embankment reinforcement on each wall panel, Compress the primary embankment layer.
(2) Place the embankment anchor for each wall panel on the upper part of the primary embankment layer, and attach the front end to the back of each wall panel.
(3) After placing the next-stage wall panel on the wall panel that has been installed, and applying the secondary embankment on the back of the wall panel to the mounting position of the anchor for embankment reinforcement on each wall panel, The secondary embankment layer is rolled.
(4) Place an embankment-reinforced earth wall anchor for each wall panel on the upper part of the secondary embankment layer, and attach its front end to the back of each wall panel.
(5) Place the next-stage wall panel on the installed wall panel, and after applying the tertiary banking to the mounting position of the anchor for embankment reinforcement on each wall panel on the back of the wall panel, Compress the tertiary embankment layer.
(6) The above steps (4) to (5) are sequentially performed upwards, and after embedding the embankment reinforcing earth wall to each uppermost wall panel, embedding to the upper end of the wall panel, the final embankment Compress the layer.
Is built by that.
The embankment part is composed of a sliding region that generates horizontal main earth pressure on the wall body and a non-moving region that generates pulling resistance on the anchor plate, and the boundary between them is a sliding surface. It is embed | buried in the embankment part so that an anchor plate may be located in an area | region (for example, refer patent document 1).

Japanese Patent Laid-Open No. 3-125720

  However, the embankment anchor for embankment reinforcement in the prior art has a problem that must be solved, such that the pulling resistance force is only the bearing resistance force of the anchor plate.

  In view of the problem that the pull-out resistance function of the anchor for embankment reinforcing earth wall is based on the anchor plate only, the present invention is based on the one bar-shaped reinforcing material that fixes the front end to the wall panel, The hook-shaped anchor plate fixed to the reinforcing material, and provided in the middle part of the bar-shaped reinforcing material in parallel with the rod-shaped reinforcing material, and having outward projecting portions from both sides of the bar-shaped reinforcing material on both sides, An anti-slip plate separate from the anchor plate, and the rod-shaped reinforcing member is inserted into a central insertion hole of the anchor plate, and the anchor plate is fixed to the rod-shaped reinforcing member. The above problem is solved by adding the friction resistance force of the slip prevention plate to the bearing pressure resistance force of the anchor plate to improve the pulling resistance performance of the anchor for embankment reinforced soil wall.

In short, the present invention includes a single bar-shaped reinforcing member for fixing the front end portion to the wall panel, a hook-shaped anchor plate fixed to the bar-shaped reinforcing member, and an intermediate portion of the bar-shaped reinforcing member in parallel with the bar-shaped reinforcing member. Provided on both sides with an outward projecting portion from both sides of the bar-shaped reinforcing member, and one slip prevention plate separate from the anchor plate, and in the insertion hole in the center of the anchor plate Since the rod-shaped reinforcing material is inserted and the anchor plate is fixed to the rod-shaped reinforcing material, if the rod-shaped reinforcing material is embedded in the embankment portion with the anti-slip plate in a horizontal state, pressure is applied in the vertical direction. Because of the large frictional resistance against the external force in the pulling direction, the friction resistance of the anti-slip plate is added in addition to the bearing resistance of the anchor plate, improving the pulling resistance performance of the anchors for embankment reinforced soil walls. So it is possible.
The anti-slip plate is a single rectangular plate, the rod-shaped reinforcing member is inserted and fixed at the center of the surface, the anti-slip plate is disposed on the side of the rod-like reinforcing member, and both sides of the anti-slip plate are arranged on the outer side. Because it is a side projecting part, it can be assembled on-site, so it is possible to improve the handleability by separating the bar-shaped reinforcing material and the anti-slip plate at the time of carrying in the field, especially the insertion fixing tool against the anti-slip plate By making it detachable or making the insertion fixture a composite material that can be disassembled from multiple fixing members, it does not allow the rod-like reinforcement to be inserted from the end to the insertion fixture of the anti-slip plate. Since it can attach with the slip prevention plate having been arrange | positioned in the intermediate part of material, the simplification of attachment work can be achieved.
Furthermore, since the anti-slip protrusion is formed on one or both of the front and back surfaces of the anti-slip plate, the friction resistance of the anti-slip plate can be further improved, and when the protrusion amount of the anti-slip protrusion is small There is little problem whether it is provided on both the front and back sides of the anti-slip plate, but if a non-slip projection with a large protrusion is formed on the back side of the anti-slip plate, even if the embankment anchor for embankment reinforcement is placed during construction, Since it may not be meshed with the unevenness of the rolling surface, and there is a slight possibility that it will be inferior in integrity with the embankment even if it is buried and rolled after that, the non-slip projection with a large protrusion amount is on the surface of the anti-slip plate By forming it, the above problems can be solved.

  Since the frictional resistance force due to the anti-slip plate exerts an effect on the pull-out resistance in the initial stage in particular, the attachment position of the anti-slip plate to the rod-shaped reinforcing material is set to the front end side from the anchor plate. It can be exhibited efficiently.

  If there is one anchor for embankment reinforced soil wall per one wall panel, the pulling resistance required for the anchor for embankment reinforced soil wall will increase, so when one anchor plate is used, it is inevitable. However, since a plurality of anchor plates are provided on the rod-shaped reinforcing material, the use of large anchor plates that are difficult to handle, for example, by arranging two anchor plates in tandem at predetermined intervals, is necessary. The two anchor plates, which are easy to handle, are required to avoid the problem, but the installation work for two sheets is necessary, but the labor of each attachment work is reduced, and the whole anchor plate installation work The increase in burden can be reduced.

  Since the anchor plate and anti-slip plate are made of fiber reinforced concrete, the rust prevention function can be improved compared to the steel plate, and the thickness of the member can be reduced and the weight can be reduced. The burden of time can be reduced.

  The embankment-reinforced earth wall according to at least one of claims 1 to 6, wherein a plurality of wall panels are arranged and connected in the vertical and horizontal directions, and a wall body and a front end portion are connected to the back surface of each wall panel. Wall anchoring, and the embedding portion on the back side of the wall main body, in which the embankment for embankment reinforced earth wall is embedded, the deformation resistance of the wall surface is suppressed by improving the pull-out resistance performance of the anchor for embankment reinforced earth wall An embankment reinforced earth wall structure with improved effects can be constructed, and the arrangement of conventional anchors for embankment reinforced earth walls is basically attached to a plurality of wall panels, whereas the present invention By improving the proof stress of the wall panel and embankment reinforced earth wall anchor, it is basically possible to cope by simply placing one embankment reinforced earth wall anchor at the center of the wall panel, saving labor in construction work. Planning Its practical effect very large, or the like can.

It is a perspective view in which the anchor plate of the anchor for embankment reinforcing earth wall according to the present invention shows a single pattern. It is a disassembled perspective view of the anchor for embankment reinforcement earth walls of FIG. It is a center longitudinal cross-sectional view which shows the attachment structure of the slip suppression plate in the anchor for embankment reinforcement of FIG. It is a center cross-sectional view which shows the attachment structure of the slip prevention plate in the anchor for embankment reinforcement earth walls of FIG. It is a center longitudinal cross-sectional view which shows the attachment structure of the anchor plate in the anchor for embankment reinforcement earth walls of FIG. It is a perspective view which shows the state which attached the anchor for embankment reinforcement earth walls of FIG. 1 to the wall surface panel. It is sectional drawing of the embankment reinforcement earth wall structure using the anchor for embankment reinforcement earth wall of FIG. It is a principal part enlarged view of FIG. It is sectional drawing which shows the state in which the primary embankment in the embankment reinforcement earth wall method was carried out. It is sectional drawing which shows the state in which the secondary embankment in the embankment reinforcement earth wall method was carried out. It is a perspective view of the anchor for embankment reinforcement earth walls which uses the slip prevention plate which formed the anti-slip protrusion on the upper surface. It is a perspective view in which the anchor plate of the embankment anchor for embankment according to the present invention has two patterns.

  An embankment-reinforced earth wall anchor 1 according to the present invention has a bar-shaped reinforcing material 2 and an anchor plate 3 as well as the above-described conventional technology, and is fixed to the side surface of the intermediate portion of the bar-shaped reinforcing material 2. It has a parallel anti-slip plate 4, and has both sides of the anti-slip plate 4 with outward protruding portions 5 and 5 a from both sides of the bar-shaped reinforcing member 2, and on one or both of the front and back surfaces 4 a and 4 b Anti-slip protrusions 6, 6a are formed.

  In the rod-shaped reinforcing member 2, a reinforcing bar is used, and a deformed reinforcing bar, preferably a screwed reinforcing bar, is used. In addition, although the rod-shaped reinforcement 2 shown with the code | symbol "2" in FIG. It is drawn.

The anchor plate 3 is made of metal or ultra high strength fiber reinforced concrete, preferably made of ultra high strength fiber reinforced concrete, and has a square plate shape as shown in FIG. Two insertion holes 7 are provided so as to be attached to one bar-shaped reinforcing member 2 as shown in FIGS.
Specifically, the insertion hole 7 of the anchor plate 3 is a screw hole having the same pitch as that of the outer peripheral screw of the rod-shaped reinforcing member 2 because the rod-shaped reinforcing member 2 is a threaded reinforcing bar, and the rear end of the rod-shaped reinforcing member 2 The outer peripheral screw of the rod-shaped reinforcing member 2 and the insertion hole 7 of the anchor plate 3 are screwed together from the portion and the anchor plate 3 is rotated to move the anchor plate 3 to the front end side of the rod-shaped reinforcing member 2 to a predetermined position, thereby reinforcing the rod-shaped reinforcement. A stopper 8 is attached to the rear portion of the material 2 from the anchor plate 3.
The stopper 8 is composed of a washer 8a and a nut 8b in the drawing. However, the stopper 8 is not limited to such a form. In short, the stopper 8 is fixed to the rear portion of the rod-shaped reinforcing member 2 from the anchor plate 3 and fixed to the anchor plate 3. As long as it can be positioned, it is sufficient.

The anti-slip plate 4 is made of metal, and is disposed on the front end side of the rod-shaped reinforcing member 2 with respect to the anchor plate 3 so as to be separated from the anchor plate 3 by a predetermined distance or more. Are formed in a rectangular shape that is long in the axial direction, and a large number of anti-slip protrusions 6, 6 a... Are formed on the back surface 4 b with a relatively small amount of protrusion, and the anti-slip plate 4 is inserted into the rod-shaped reinforcing member 2. 9 and the both sides of the insertion fixture 9 in the slip prevention plate 4 are the outward projecting parts 5 and 5a.
For example, as shown in the drawing, the insertion fixture 9 is composed of two insertion fixing members 9a, 9b provided at the center of both ends of the slip prevention plate 4, and each insertion fixing member 9a, 9b is one U A U-bolt 10, washers 11, 11 a and nuts 12, 12 a for the U-bolt, and a clamping plate 13 spanned between the front ends of the U-bolt 10 are provided.
At the center of each end portion of the anti-slip plate 4, both end portions of the U-bolt 10 are connected to the two holes 14, 14 a provided in parallel in the short side direction of the anti-slip plate 4. Insertion holes formed at both ends of the sandwich plate 13 that are inserted and protruded from below the anti-slip plate 4 so as to place the rod-shaped reinforcing material 2 between both ends of the sandwiching plate 2. 15 and 15a are inserted, and nuts 12 and 12a are screwed and tightened to the projecting ends via washers 11 and 11a, and the rod-shaped reinforcing member 2 is clamped between the slip prevention plate 4 and the clamping plate 13, The slip prevention plate 4 is fixed below the middle part of the rod-shaped reinforcing member 2.
Note that a stopper 16 composed of, for example, a washer 16a and a nut 16b, may be disposed and fixed at the rear portion of the slip prevention plate 4 as in the stopper 8 of the anchor plate 3.

  In another embodiment of the anti-slip plate 4, it is made of ultra high strength fiber reinforced concrete, and as shown in FIG. 11, a large number of anti-slip protrusions 6, 6 a. The anti-slip protrusions 6, 6 a... Are triangular protrusions that are long in the width direction of the anti-slip plate 4 and are arranged in parallel at predetermined intervals in the longitudinal direction of the anti-slip plate 4. It is an article.

  In addition, the embankment 1 for embankment reinforcing earth wall has a pattern in which a plurality of anchor plates are attached in addition to the pattern in which one anchor plate 3 is attached as described above. For example, as shown in FIG. Furthermore, two large and small anchor plates 3 and 3a are attached to the rear end portion and the middle portion of one bar-shaped reinforcing member 2, and both are arranged on the front end side of the rod-shaped reinforcing member 2 from the anchor plate 3. Further, the front anchor plate 3a and the anti-slip plate 4 are separated from each other by a predetermined distance, and the anchor plate 3 at the rear end is made larger than the anchor plate 3a at the intermediate part, and the mutual anchor plates 3a are separated from each other by a predetermined distance. It is arranged.

Further, in the embankment-reinforced earth wall structure using the embankment-reinforced earth wall anchor 1, a plurality of wall surface panels 20, 20a,... The above-mentioned embankment for reinforcing earth wall 1 connected to the center of the back surface of each wall panel 20, 20a, and the embankment portion 22 in which the above-mentioned embankment 1 for embankment reinforcing earth wall is embedded in the back side of the wall body 21. Is constructed in the same procedure as the steps (1) to (6) in the prior art, but the anchor for embankment reinforcing earth wall to each wall panel 20, 20a ... in the steps (2) and (4) above. The mounting method 1 includes a bracket 23 projecting rearward from the center of the back of each wall panel 20, 20a... And a bracket 24 integrally fixed to the front end of the embankment 1 for embankment reinforcement with pile bolts 25 and nuts 26. This is done by connecting.
Further, the embankment portion 22 is composed of a plurality of embankment layers 22 a, 22 b, and has a slip region 28 and a non-moving region 29 with a slip surface 27 as a boundary, and the slip prevention plate 4 is located within the non-moving region 29. The rod-shaped reinforcing member 2 is attached so as to be disposed at a position close to the sliding surface 27.

  Although not shown, when the embankment portion 22 is high, or when the embedding portion 22 is soft, a plurality of embankment reinforcing earth wall anchors 1 are provided on part or all of the wall panels 20, 20a,. 1 may be connected and installed.

DESCRIPTION OF SYMBOLS 1 Anchor for embankment reinforced earth wall 2 Bar-shaped reinforcement 3 Anchor plate 4 Anti-slip plate 5, 5a Outward projecting part 6, 6a ... Anti-slip protrusion 7 Insertion hole 9 Insertion fixture
20, 20a… Wall panel
21 Wall body
22 Embankment
27 Sliding surface
29 Immovable area

Claims (7)

  One bar-shaped reinforcing member for fixing the front end to the wall panel, a hook-shaped anchor plate fixed to the bar-shaped reinforcing member, and both side portions provided in the middle of the rod-shaped reinforcing member in parallel with the bar-shaped reinforcing member And an anti-slip plate separate from the anchor plate, which has outward protruding portions from both sides of the bar-shaped reinforcing material, and the bar-shaped reinforcing material is inserted into the central insertion hole of the anchor plate. An anchor for embankment reinforced earth wall, wherein the anchor plate is fixed to the rod-shaped reinforcing material through insertion.   The slip prevention plate is a rectangular plate, the rod-shaped reinforcing member is inserted and fixed at the center of the surface, and both sides of the slip prevention plate are the outward projecting portions. Anchor for embankment of reinforced embankment.   The anchor for embankment reinforced earth wall according to claim 1 or 2, wherein a non-slip protrusion is formed on one or both of the front and back surfaces of the slip prevention plate.   4. The embankment for earth reinforcement with earth reinforcement according to claim 1, 2 or 3, wherein the attachment position of the anti-slip plate with respect to the rod-shaped reinforcing material is the front end side of the anchor plate.   5. The anchor for embankment reinforcing earth wall according to claim 1, wherein a plurality of anchor plates are provided on a bar-shaped reinforcing material.   6. The anchor for embankment reinforced soil wall according to claim 1, wherein the anchor plate and the slip prevention plate are made of fiber reinforced concrete.   The embankment-reinforced earth wall according to any one of claims 1 to 6, wherein the wall body is configured by connecting a plurality of wall panels in the vertical and horizontal directions, and the front end is connected to the back surface of each wall panel. An embankment-reinforced earth wall structure comprising an anchor for use and an embankment portion on the back side of the wall main body in which the anchor for embankment-reinforced earth wall is embedded.

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