JPH0725035U - Retaining wall block anchor - Google Patents

Abstract

(57) [Summary] [Purpose] The retaining wall block is inexpensive and reasonably fixed, and is stably fixed by a large fixing force. [Structure] The retaining wall block 1 made of precast concrete has an anchor hole 5 penetrating from the surface on the site side to the side of the natural ground. A tension member hooking portion 6 is integrally provided so as to cross the anchor hole 5. The hook portion 6 is located slightly recessed from the surface on the site side. A hooked portion of a belt-shaped tension member 7 made of synthetic resin fiber or the like folded back in the middle is hooked on the hook portion 6. Both ends of the tensile member 7 are spread out and extended to the natural ground, and the earth is embanked on this. [Operation] Since the folded back tension member 7 is hooked on the hook portion 6 to be connected, the connection is simple and the work is easy. Since the strip-shaped tension member 7 receives earth pressure, the retaining wall can be stably fixed by a large fixing force.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an anchor of a retaining wall block, and particularly to an anchor having good workability and stability when constructing a retaining wall.

[0002]

[Prior art]

 Various anchors have been used in the past to fix the retaining wall block. Since the retaining wall block is generally made of precast concrete, there is also a method of embedding a nut member in advance and fixing an anchor such as a lock bolt into this. However, such a retaining wall block is difficult to manufacture and the block is expensive. Also, there are steel rods and twisted PC stranded wire as tensile materials that can be fixed with nuts and wedges, but there were problems with rust prevention and adhesion area on embankments.

On the other hand, as shown in FIG. 7, a bracket b made of steel is provided so as to project from the side surface of the ground of the block a, and an anchor for folding the middle of the bracket b and hooking the tension member c is also adopted. Has been done.

[0004]

[Problems to be solved by this device]

 The problem of the anchor as shown in FIG. 7 is that the bracket b is likely to be rusted first, and if the bracket b is corroded, the block a may fall down. There is also a problem in that the work for embedding the bracket b takes extra time and the block a becomes expensive. Also, since the bracket b only projects to the side of the ground of the block a, it cannot be said that the tension member c is pulled from the site side to adjust the length, and it is extremely difficult to adjust the length. there were.

[0005]

[Means for Solving the Problems]

 The anchor of the retaining wall block according to the present invention comprises a retaining wall block made of precast concrete, provided with a tension member hooking portion, and the folding portion which is folded back in the middle is hooked. Anchor holes penetrate through the retaining wall block from the surface facing the road or building site to the side of the natural ground where embankment is applied. A tensile member hooking portion is provided in this anchor hole. The tension member hooking part is formed integrally with the block, and is made of concrete like the other parts. The tension member hooking portion straddles the inner circumference of the anchor hole so as to cross the anchor hole. This tensile member hooking part is located slightly recessed from the site side surface. Although various shapes can be used for the retaining wall block, for example, a hexagonal concrete slab with a roof-shaped protrusion that is continuous in the edge direction on the three sides facing downward, The side may be a block having a V-shaped groove-shaped receiving portion continuous in the edge direction.

As the tensile material, a belt-shaped material is used, and various materials such as a synthetic resin fiber woven into a belt shape and a stainless steel thin wire woven into a belt shape can be used. The tension member is folded back in the middle, and the folded back portion is hooked on the hooking portion of the tension member. Stand the retaining wall block on which the tension material is hooked up, and extend both ends of the tension material above the natural ground. Embankment is applied on top of this, and the strip-shaped tension members are fixed so that they are sandwiched from above and below.

[0007]

【Example】

 Hereinafter, the present invention will be described in detail based on the embodiments shown in the drawings. In the figure, 1 is a retaining wall block, which is a hexagonal precast concrete slab. When the retaining wall block 1 is erected, a ridge-shaped protrusion 2 continuous in the edge direction is continuously formed on the three sides facing downward, and a V-shape continuous in the edge direction is formed on the three sides facing upward. The groove-shaped receiving portion 3 is continuously formed. A rectangular anchor hole 5 penetrates from the surface of the retaining wall block 1 facing the road or building site side to the surface facing the natural ground side. A tension member hooking portion 6 is provided across the inner circumference so as to horizontally cross the anchor hole 5. The hook portion 6 is located slightly recessed from the surface of the block 1 on the site side. The cross section of the hook portion 6 is formed so that the site side has an arcuate surface.

As the tension member 7, a synthetic resin fiber woven into a band is used. The tension member 7 is passed through the anchor hole 5 from the ground side surface of the retaining wall block 1, folded back and pulled out to the ground side surface again, and the folded portion in the middle of the tension member 7 is hooked on the hook portion 6. Such a retaining wall block 1 is erected, and when the block 1 is already present below, the receiving portion 3 of the lower block 1 is fitted with the protrusion 2 of the upper block 1. By the engagement of the protrusion 2 and the receiving portion 3, the surface of the blocks 1, 1 on the left, right, up and down is adjusted to be flush with each other, and even if a load is applied, there is no deviation. In this state, spread the tension material 7 so as to lay it on the ground, and extend both ends toward the back of the ground.

As described above, the embankment 8 is applied on the tensile member 7 so as to sandwich the tensile member 7. The tensile member 7 has a strip shape and can receive a large fixing force by receiving earth pressure. When the tensile member 7 is loosened, the tensile member 7 is pulled toward the site as shown in FIG. An auxiliary member is packed between the tension member 7 and the hook portion 6 or a hardening member 9 is packed to absorb the slack. Since the hook portion 6 is slightly recessed from the site-side surface, even if the tension member 7 is pulled slightly to the site side, it does not project from the site-side surface. After that, block 1 is sequentially stacked. As shown in FIG. 5, not all the blocks 1 are fixed by the tension members 7, but the blocks 1 which are not fixed by the tension members 7 are stacked so as to be sandwiched from above, below, left and right. The anchor hole 5 is filled with a hardening material 10 such as mortar or concrete to close the hole 5.

As described above, in the block 1 of the embodiment, the hook portion 6 that horizontally traverses the anchor hole 5 is provided. As shown in FIG. 6, the tension member 7 is hooked on the hook portion 6 that vertically traverses the anchor hole 5. May be. Further, in the above embodiments, the tensile material 7 was directly embedded in the ground, but it is also possible to spray a hardening material such as mortar or concrete on the tensile material to further increase the fixing force.

[0011]

[Effect of device]

 Since the present invention has the above-mentioned configuration, the following effects can be obtained. Since the tension member hooking part is formed integrally with the retaining wall block made of precast concrete, it does not rust and the block can be manufactured at low cost. Since the tension member hangs the folded-back portion on the hooking portion, the connection will not be disconnected and there is no need for a nut member or the like, and the work is easy. Since a strip-shaped tension material is embedded in the ground, a large fixing force can be obtained by receiving earth pressure in a wide area. Since the tension material hooking part is slightly recessed from the site surface, the tension material does not project from the site side surface even when pulled to absorb the slack of the tension material. Since the tension material is hung on the hook, it is also possible to connect synthetic resin materials that could not be connected to the block with conventional nuts and wedges, making use of the characteristics of synthetic resin that does not worry about rust, and reliability is improved. It becomes a high anchor. By providing the receiving part above the hexagonal retaining wall block and the projecting part below, there will be no gap between the upper, lower, left and right surfaces of the block. Further, it is possible to fix the blocks by engaging the protrusions and the receiving parts of the adjacent blocks without necessarily providing the anchors to all the blocks.

[Brief description of drawings]

FIG. 1 is a perspective view of an embodiment of an anchor of a retaining wall block according to the present invention.

FIG. 2 is a half-cut perspective view of a retaining wall block.

FIG. 3 is a sectional view of a retaining wall block in a standing state.

FIG. 4 is a cross-sectional view of an anchor hole.

FIG. 5 is a front view of a state where the retaining wall blocks are stacked.

FIG. 6 is a perspective view of another embodiment of the anchor hole.

FIG. 7 is a perspective view of an anchor of a conventional retaining wall block.

[Explanation of symbols]

 1 Retaining wall block 2 Projection part 3 Receiving part 5 Anchor hole 6 Hooking part 7 Tensile material 8 Fill material 9 Hardening material 10 Hardening material

Claims (4)

[Scope of utility model registration request] 1. A tension member hooking portion that penetrates the anchor hole from the site side surface toward the side of the natural ground, straddles across the anchor hole, and is slightly recessed from the site side surface is integrally provided. Standing up a retaining wall block made of precast concrete, fold the folded part of the strip-shaped tension material folded back in the middle to the tension material hooking part of the retaining wall block and extend both ends on the ground side ground, this ground An anchor for a retaining wall block that has been settled by embedding a tensile material in the ground and embedding it in it. 2. A hexagonal precast concrete slab having roof-shaped protrusions continuous in the edge direction on the three sides facing downward, and V-shaped groove shapes continuous in the edge direction on the three sides facing upward. 2. An anchor for a retaining wall block according to claim 1, wherein the retaining wall block provided with the receiving portion is used. 3. An anchor for a retaining wall block according to claim 1, wherein a synthetic resin strip is used as the tension material. 4. An anchor for a retaining wall block according to claim 1, wherein a steel strip material is used as the tension material.