JP2767372B2 - Slope stabilization method and concrete block used for it - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for stabilizing a slope with excellent adhesion between a concrete block and a ground and a concrete block used for the method.

[0002]

2. Description of the Related Art As a method of stabilizing a slope of this kind, there are a vegetation method, a method of arranging concrete blocks, and a method of constructing a method frame. Are better.

[0003]

However, the method of constructing a formwork requires a great deal of time to install and assemble the formwork on the slope, and also involves a risk of spraying the mortar.

[0004] On the other hand, in the case of constructing a method frame using a pre-made method frame block, if there is unevenness on the slope, the concrete block is a rigid body which is not easily deformed. Is fixed as it is formed, and there is a problem that the adhesion to the ground is not sufficient.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to simplify the construction and to make the concrete block and ground firmly adhere to each other so as to be more excellent in fixing property when fixing with an anchor.

[0006]

The above object is achieved by arranging a large number of substantially cross-shaped concrete blocks in a plan view, regularly adjacent to each other on a slope, wherein the concrete blocks are arranged at the intersections thereof. A hardening material filling hole communicating with the lower surface of each cross side is formed, and after the concrete block is installed or anchored, the hardening material is injected from the hardening material filling hole into the gap between the concrete block bottom surface and the ground. The problem can be solved by bringing the concrete block into close contact with the ground. Further, in the concrete block, near the intersection, a concave portion recessed from the surface is formed, and an anchor insertion hole is formed from within the concave portion, and a hardening material filling hole communicating with the lower surface of each cross side is formed. Alternatively, a concrete block may be used. In these cases, a concrete block in which a hardening material injection pipe is embedded may be used instead of the hardening material filling hole. Further, in the injection, the hardening material sent through the one feeding path is filled in each hardening material filling hole or the hardening material injection hole formed in the concrete block in the middle of the hardening material feeding path leading to the concrete block. It is desirable to have an infusion device for dispensing the tubing so that the curable material is injected at one time.

[0007]

According to the present invention, a concrete block is arranged on a slope. In this case, the arrangement can be completed only by lifting the object with a crane or the like and installing it at a predetermined position, and it can be quickly arranged with almost no human power. In addition, since the concrete blocks are regularly arranged adjacent to each other on the slope, a geometrically superior appearance is provided. In addition, since the anchor is formed in addition to simply placing the concrete block on the slope, excellent stability can be maintained by pressing the slope with the concrete block.

Further, in the case of the concrete block according to the present invention, it is preferable that a concave portion is formed near the intersection point from the surface, an anchor insertion hole is formed from within the concave portion, and the lower surface of each cross side is formed. Is formed with a hardening material filling hole that communicates with the hole. Therefore, since the hardening material is filled between the concrete block bottom surface and the ground from the hardening material filling hole, the concrete block and the ground are kept in close contact with each other even on a relatively uneven slope. Can be established. Here, since the hardening material filling holes are arranged intensively at the intersections, the pouring operation is facilitated, and finally, the mortar is filled in the concave portions, so that the hardening material filling holes are simultaneously formed. Closed, aesthetics improve. If the upper opening of the hardening material filling hole is formed at the cross-shaped side, the material age of the mortar to be filled later is different from the material age of the main body, so that the portion is conspicuous and impairs aesthetic appearance.

In addition, by using the above-mentioned injection device, even if there are a plurality of injection points, all the injection points can be filled with the grout material by one injection operation, so that the injection operation can be efficiently performed. It can be carried out.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in more detail with reference to the drawings. In FIG. 1, a concrete block 1 according to the present invention has a substantially cross shape in plan view, and a large number of the blocks 1, 1,... Are cross-shaped along a length direction (L direction) of a slope. Are arranged adjacent to each other so that one side thereof forms a line. In the embodiment, the other side is also arranged adjacently in a row in the height direction connecting the shoulder 2 and the tail 3.

When the ground strength of the slope is small,
A staggered arrangement may be used to reduce the load and increase the number of anchors. Furthermore, there is a case where they are arranged in a row in the inclination direction.

The concrete block 1 has, for example, a side of a cross having a length of about 2 to 3 m and a thickness of 400 to 400 mm at the center.
It is 600 mm, 250-350 mm at the end, and a downward slope is formed toward the end. Furthermore, near the intersection of the cross,
A concave portion 10 that is recessed from the surface is formed, and an insertion hole 11 that penetrates from the center of the concave bottom surface 10A to the lower surface is formed. In addition, although the direction of the insertion hole 11 in the embodiment is a direction orthogonal to the slope, it can be formed so as to be slightly upward in the direction of the shoulder 2.

At the time of construction, the concrete block 1
The suspension bolts 12 planted on the surface of each of the feet are wound with a wire, lifted up by a crane or the like, and arranged at predetermined positions.

Next, or simultaneously and concurrently, a tensile member 20 such as a steel rod is inserted into the insertion hole, and an anchor body 21 is formed at the tip end thereof by injecting cement milk or the like. Anchor head 20
A is placed in the recess 10 and the supporting plate 22 is placed in the recess bottom 10A.
, And is fixed in a state where a tensile force is applied to the anchor body 21. These anchors are assigned to each block 1,
1 is performed every time. The anchor insertion hole 1 in the embodiment
Reference numeral 1 denotes that one concrete block 1 is formed so as to be enlarged toward the rear surface side so as to be commonly used for a slope having a different slope.

Further, the concrete block 1 is formed with oblique hardening material filling holes 13 communicating with the lower surface of the end of each cross side of the concrete block 1 from within the recess 10. When the slope has irregularities, a gap is formed between the lower surface of the concrete block 1 and the ground. However, before the concrete block is set and the anchor is fully fixed, the hardening material filling holes 13, 13,. And then filling the space between the bottom of the concrete block and the ground with the curable material 15 and then anchoring the concrete block 1 so that the concrete block 1 and the ground are completely adhered. Can be. Examples of the curable material include mortar, cement-based hardening materials such as concrete, urethane foam, resin-based hardening materials such as styrene foam, and water glass-based hardening materials used in ground improvement methods and the like. .

After anchor anchoring, the recess 10 is filled with mortar 23 or the like, and the surface thereof is finished flush with the surface of the block 1.

Further, as shown in the bottom view of FIG. 4, one having a planar notch recess 14, 14... Formed in the penetrating portion of the hardening material filling holes 13, 13,. Can also. As shown in FIG. 5, the cutout recesses 14, 14,... May be cut out in a box shape by being dug down from each of the four surroundings. Further, as shown in FIG. 6, the notch concave portions 14, 14... Formed on the respective cross sides can be connected by connecting concave grooves 16, 17. In the case where the connecting grooves 16 and 17 are continuous, the hardening material injected into the lower surface of the concrete block is guided to the connecting grooves 16 and 17 and spreads to the lower surface of the block. Close contact with the ground can be achieved.

In the present invention, the hardening material filling holes 13, 13
Are concentrated in one place (recess 10), which facilitates the injection operation, and finally, when the mortar is finally filled in the recess 10, the hardening material filling holes 13, 13 are closed at the same time, and the appearance is improved. If the upper opening of the hardening material filling hole 13 is formed at the cross-shaped side, the material of the mortar to be filled later differs from the material age of the main body, so that the portion is conspicuous and impairs the appearance.

It is desirable that the hardening material filling hole 13 is formed at the upper surface side in the concave portion 10 as described above. However, as shown in FIG. From the upper surface of the convex intersection 14
3 and 13 are formed. Further, as shown in FIG. 9, when the recess 10 is formed in a range narrower than the intersection, the hardening material filling hole 1 is located outside the recess 10 and from the upper surface of the intersection.
3, 13,... May be formed.

By the way, the hardening material filling holes 13, 13...
May be buried as shown in FIG. In the example shown in the figure, the injection pipe 24 is made to protrude from the anchor insertion hole 11.
It may be made to protrude from a portion adjacent to 1.

The hardening material is injected into the hardening material filling holes 13, 13.
, And an injection hose 25 is connected to an injection pipe 24 via a joint 26 as shown in FIG. 10, and the hardening material is pressurized using a grout pump or the like. inject. In this case, the filling hoses 2 are sequentially filled for each filling hole 13 or for each filling pipe 24.
If the pressure injection is performed by connecting 5, it takes time and effort to perform the operation. Therefore, it is preferable to use an injection device 27 as shown in FIG. 11. The injection device 27
Is a hollow body having one end connected to an injection hose 25 and the other end connected to distribution hoses 28, 28... For distributing and supplying the hardening material sent from the injection hose 25. At the same time, the hardening material can be injected into the bottom surface of the concrete block 1 through each filling hole 13 and the injection pipe 24.

By the way, in the case of the concrete block 1 in which the injection pipe 24 projects from the anchor insertion hole 11 shown in FIG. 10, the structure of the anchor fixing portion is, for example, as shown in FIG. An injection pipe through hole 32 penetrating through the injection pipe is formed, and the injection pipe 24 buried is inserted through the injection pipe through hole 32, and an injection hose 25 is connected thereto to inject the hardening material.

The construction procedure of the concrete block 1A will be described. First, an anchor hole is drilled from the slope surface, a tensile member 20 is inserted, and an anchor body 21 is formed at the tip of the tensile member 20.

Thereafter, the concrete block 1A is placed on the slope while the tensile member 20 projecting from the anchor hole mouth is passed through the anchor insertion hole 11 of the concrete block 1 from its rear end. As described above, after the concrete block is installed, the tensile member 20 is inserted,
The procedure for forming the anchor material 21 may be used.

Then, after the tension member 20 is tension-fixed, a hardening material 15 such as mortar is injected from the hardening material filling hole 13 as shown in FIGS. The gap between the ground and the ground. In addition,
After the concrete block 1A is installed, a filler can be injected from the hardening material filling holes 13, 13... Before the tension member 20 is tensioned. Also, the temporary tension of the anchor, the filling of the mortar to the lower surface of the block, and the actual tension of the anchor may be performed in this order. In any case, after the tension of the anchor and the filling of the mortar to the lower surface of the block are completed, the concave portion 10 is formed.
Is filled with mortar, and predetermined processing is performed on the fixing unit. It is preferable that the curable material has low fluidity so as not to sag even in the case of a steep gradient. Further, when the hardening material flows out of the gap portion between the block and the lower surface due to the pressure injection, the surroundings of the block can be filled with mortar and then the hardening material can be injected.

[0026]

As described above, according to the present invention, simplification of construction can be achieved, and when fixing with an anchor, the aesthetic appearance is excellent, and the concrete block and the ground are in close contact with each other. Advantages such as better fixability are provided.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an arrangement state of a concrete block on a slope.

FIG. 2 is a plan view of a concrete block.

FIG. 3 is a cross-sectional view showing a state where a concrete block is fixed to the ground.

FIG. 4 is a block bottom view showing an example of a bottom shape of a concrete block.

FIG. 5 is a block bottom view showing another example of the bottom shape of the concrete block.

FIG. 6 is a bottom view of the block when the notched concave portions are connected by connecting concave grooves.

FIG. 7 is a cross-sectional view of a concrete block fixed to the ground.

FIG. 8 is a sectional view showing another example of a concrete block.

FIG. 9 is a sectional view showing another example of a concrete block.

FIG. 10 is a sectional view showing another example of a concrete block.

FIG. 11 is a perspective view of an injection device for dispensing and delivering.

FIG. 12 is an enlarged view of an anchor fixing part structure.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Concrete block, 10 ... Recess, 10A ... Bottom, 11 ... Anchor insertion hole, 12 ... Hanging bolt, 13 ...
Curing material filling hole, 14: Notch concave portion, 15: Curable material,
16.17: connecting groove, 20: tensile member, 20A: anchor head, 21: anchor body, 22: supporting plate, 24: pipe for injection

Claims (7)

(57) [Claims] 1. A large number of substantially cross-shaped concrete blocks in a plan view are regularly arranged adjacent to each other on a slope, and the concrete blocks communicate with the lower surface of each cross side from an intersection thereof. After the hardening material filling hole is formed and the concrete block is installed or anchored, the hardening material is injected from the hardening material filling hole into the gap between the concrete block bottom surface and the ground, and the concrete block and the ground are removed. The method of stabilizing the slope, which is characterized by the close contact of 2. A concave portion which is recessed from the surface is formed near the intersection, an anchor insertion hole is formed from within the concave portion, and a hardening material filling hole communicating with the lower surface of each cross side is formed. The method for stabilizing a slope according to claim 1, wherein a concrete block is used. 3. A concrete block in which a hardening material injection pipe is buried instead of the hardening material filling hole.
The slope stabilization method described. 4. A hardening material feeding hole or a hardening material injection pipe formed in a concrete block in the middle of a hardening material feeding path leading to a concrete block. 2. An injecting device for dispensing and delivering a curable material at a time.
3. A method for stabilizing a slope according to any one of Items 3 to 3. 5. The concrete block according to claim 1, wherein the block is a substantially cross-shaped concrete block as viewed in plan, and a hardening material filling hole is formed from an intersection thereof to communicate with a lower surface of each cross side. Concrete block used for slope stabilization method. 6. A concrete block substantially cross-shaped in plan view, wherein a concave portion recessed from the surface is formed near the intersection thereof, and an anchor insertion hole is formed from within the concave portion. 3. The concrete block used in the slope stabilization method according to claim 2, wherein a hardening material filling hole communicating with a lower surface of the cross side is formed. 7. The concrete block used in the slope stabilization method according to claim 1, wherein a hardening material injection pipe is buried in place of the hardening material filling hole.