JP3405977B2 - Retaining wall and its construction method - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a retaining wall and its construction method, and more specifically, it is easy to connect natural stone to the retaining wall.
Retaining wall that can be quickly and reliably and its construction method.

[0002]

2. Description of the Related Art Retaining walls are used for revetments of rivers and slopes of roads, and support the soil on the back to prevent the collapse. As a kind of conventional retaining wall, in order to bring out the natural landscape,
Natural stones are fixed to the surface of a water-permeable concrete block (secondary concrete product) via cement,
As a result, natural stones have been laid on the entire wall of the retaining wall.

[0003]

However, in the conventional retaining wall, natural stone having a large uneven surface as it was at the time when it was quarried in this way was fixed to the surface of the concrete block by cement. . Therefore, the natural stone cannot be properly positioned with respect to the fluid cement, and the positioning work takes a long time. Moreover, since the surface of natural stone has large irregularities,
A gap is likely to appear between the natural stone and the cement. As a result, natural stones could not be fixed with sufficient strength, and the certainty of natural stones was reduced.

[0004]

OBJECTS OF THE INVENTION It is an object of the present invention to provide a retaining wall and a method of constructing the retaining wall in which natural stones can be easily coupled to the retaining wall and the coupling can be performed quickly and reliably. . Further, the present invention provides a method for constructing a retaining wall in which concrete having fluidity does not flow out from a gap between natural stone and natural stone when pouring concrete,
Its purpose is.

[0005]

According to a first aspect of the invention, in a retaining wall in which a large number of natural stones are laid on the wall surface of a concrete secondary product, the concrete secondary product is provided with a large number of anchor members. Assembled reinforcing bars that are planted in a separated state are buried, at the ends of a large number of natural stones, a groove portion for inserting the anchor member is formed, and an anchor member is inserted in each groove portion filled with an adhesive, Each natural stone is a retaining wall fixed to the concrete secondary product. This retaining wall is constructed, for example, on the bank of a river or on the slope of a road. As the concrete secondary product, for example, a concrete block, a sine block, a concrete waterway or the like can be adopted. As the natural stone adhesive, for example, an epoxy resin-based stone adhesive can be used. Natural stones are unprocessed stones (including boulders) such as peridotite, sandstone, and limestone. However, here, artificial stones that look like natural stones are included. The material of the anchor member is not limited. For example,
The rebar may be assembled into a predetermined shape, or an iron piece or the like may be used.

The shape of the anchor member is not limited. For example, in addition to the triangular shape, a polygonal shape such as a quadrangle or more may be used. Further, the number of anchor members is not limited to one for one natural stone. For example, a plurality of anchor members may be arranged for one natural stone. When the anchor member is inserted into the groove, it is preferable to fill the groove with an adhesive because the bondability between the anchor member and the natural stone is enhanced. The assembled rebar is, for example, a plan view of the rebars assembled in a lattice shape. The anchor members are erected on the assembled rebar in a state of being substantially at a right angle. The shape of the groove portion of the natural stone corresponds to the shape of the anchor member. Further, when a plurality of anchor members are arranged for one natural stone, grooves are formed by the number of anchor members.

According to a second aspect of the present invention, a step of preparing a large number of natural stones having a groove portion formed at one end thereof, and a step of assembling a retaining wall formwork around a wall surface of a secondary concrete product, In the inner space of the retaining wall formwork, a step of arranging an assembled rebar in which a number of anchor members are erected, and inserting each of the anchor members into a corresponding groove portion filled with an adhesive,
Retaining wall including a step of connecting each natural stone to an assembling rebar and a step of pouring concrete into the internal space of the retaining wall formwork and placing a retaining wall on which many natural stones are laid on the wall surface Is the construction method. The casting of concrete may be performed with the retaining wall formwork placed horizontally or with the retaining wall formwork placed vertically. At the time of vertical installation, it is preferable to dispose the joint stop member in the gap between the natural stones, because concrete having fluidity does not flow out from the gap between the natural stones. In addition, in the factory beforehand,
After making a retaining wall block that divides the retaining wall into multiple parts, transporting each retaining wall block to the site, and then stacking these retaining wall blocks on the slope of the road, the retaining wall is assembled on site. Good.

The invention according to claim 3 is the construction of a retaining wall according to claim 2 , wherein a joint stop member is arranged in a gap between the natural stones and concrete is placed while maintaining this state. Is the law. As a material for the joint stop member, for example, Styrofoam or the like can be adopted. The size and shape of the joint stop member are appropriately determined according to the gap between the natural stones.

[0009]

According to the first to third aspects of the present invention, when the natural stone is fixed to the wall surface of the concrete secondary product, the anchor member erected on the assembled rebar is placed in the groove filled with the adhesive. To insert. In this way, since the natural stone is fixed via the anchor member, the natural stone can be more firmly fixed to the secondary concrete product.

In particular, according to the second aspect of the invention, the natural stones are connected to the assembled reinforcing bars by inserting the anchor members into the corresponding grooves, and then concrete is poured into the internal space of the retaining wall formwork. Then, a retaining wall with many natural stones placed on the wall is placed. Since the retaining wall decorated with natural stone is constructed by these steps, the natural stone can be easily constructed on the retaining wall, and this construction can be performed quickly and reliably.

Further, according to the invention of claim 3 , since the joint fixing member is arranged in the gap between the natural stones and the concrete is poured, the concrete having fluidity is natural when the concrete is poured. Difficult to flow out from the gap between stone and natural stone.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a retaining wall according to an embodiment of the present invention and a construction method thereof will be described. First, the first embodiment will be described. FIG. 1 is an enlarged sectional view showing a construction state of a retaining wall according to the first embodiment of the present invention. In FIG. 1, 1
Reference numeral 0 is a retaining wall, and this retaining wall 10 is formed on a flat wall surface of an existing concrete water channel (concrete secondary product) 11 with a large number of natural stones 13 having a flat adhesive surface through an adhesive 12.
Are bonded together.

The method of constructing the retaining wall 10 will be specifically described below. Prepare a large number of natural stones 13 ...
A stone cutting device (not shown) cuts one end of each natural stone 13 so that the cut surface becomes flat. Next, high-pressure washing water is sprayed on the exposed surfaces of the concrete waterway 11, that is, the upper end surfaces on both sides of the concrete waterway 11, the slopes and bottom surfaces on both sides, and the dirt and dust adhering to these surfaces are blown off. Wash with water. After that, an epoxy resin-based adhesive 12 for stone material is applied to the cut surfaces of the natural stones 13 ... And the natural stones 13 ... Are bonded to the entire exposed surfaces of the concrete water channel 11.

In this way, since the concrete water channel 11 and the natural stones 13 are adhered to each other by their flat surfaces, even if the natural stones 13 have large irregularities on their surfaces, these natural stones 13 ... Can be accurately and firmly fixed to each exposed surface of the concrete waterway 11 in a short working time. In addition, here, since each exposed surface of the concrete water channel 11 is washed with high pressure water in advance, dust and dirt adhering to these wall surfaces are removed, the adhesiveness of the adhesive 12 to the wall surface is increased, and the natural stones 13 ... It can be firmly bonded to the concrete channel 11.

Next, a second embodiment of the present invention will be described with reference to FIG. FIG. 2 is a cross-sectional view of a retaining wall construction state according to the second embodiment of the present invention. As shown in FIG. 2, the feature of this second embodiment is that the adhesive 1 is applied to the existing retaining wall 20 provided by stacking a large number of intelligent blocks 11A.
The point is that a large number of natural stones 13 ... Specifically, the natural stone 13 having the cut surface coated with the adhesive 12 is adhered to the wig of each of the knowledge blocks 11A. In FIG. 2, 21 is a backfill material. 22 is the basis. Reference numeral 23 is a top block. Other configurations, operations, and effects are substantially the same as those of the first embodiment, and thus the description thereof will be omitted.

Next, a third embodiment of the present invention will be described with reference to FIGS. FIG. 3 is a cross-sectional view of a retaining wall construction state according to a third embodiment of the present invention. FIG. 4 is an enlarged front view of the retaining wall according to the third embodiment of the present invention. FIG. 5 is a perspective view showing an assembling work of natural stones in the retaining wall construction method according to the third embodiment of the present invention. Figure 6
(A) is an enlarged plan view showing an assembled state of natural stones in a method of constructing a retaining wall according to a third embodiment of the present invention. FIG.6 (b) is a longitudinal cross-sectional view which shows the assembled state of the natural stone in the construction method of the retaining wall which concerns on the 3rd Example of this invention. As shown in FIGS. 3 to 6, a feature of the retaining wall 30 according to the third embodiment is that a concrete block (secondary concrete product) 11B is assembled with a large number of anchor members 31 ... Reinforcing bars 32 are buried, and not one end of each natural stone 13 ... Is a flat adhesive surface as in the first embodiment, but a groove 13a ...
, The anchor members 31 are inserted into the grooves 13a filled with the adhesive 12, and the natural stones 13 are fixed to the concrete blocks 11B. The point is that they have a structure in which they are arranged in a horizontal row for use.

The method of manufacturing each retaining wall block 30A will be described in detail below. First, in the factory, each natural stone 1
Grooves 13a ... Are formed at one end of 3 ... by a band saw type stone cutting device (FIG. 6). Then, at the same factory, the concrete block 11B was placed vertically.
A retaining wall form 33 is assembled around the (2 m × 2 m) wall surface (FIG. 5). At this time, the concrete block 11B is assembled so that a space for placing concrete is defined on the surface side thereof. Next, in the internal space of the retaining wall form 33, the assembled reinforcing bars 32 assembled in a lattice shape are arranged vertically along the surface of the concrete block 11B. At this time, a large number of anchor members 31 ... Are erected in advance in the longitudinal direction of the longitudinal reinforcing bars of each of the assembled reinforcing bars 32 in a state of abutting each other. Each anchor member 31 is formed by assembling four short reinforcing bars having a diameter of 10 to 13 mm in a rectangular shape.

Next, the groove portions 13a ... Are filled with the adhesive 12, and the anchor members 31 are inserted into the corresponding groove portions 13a. Then, the adhesive 12 is hardened, so that the natural stones 13 are indirectly connected to the assembly rebars 32, respectively. Then, a joint member 34 made of styrofoam cut according to the shape of the gap is fitted into the gap between the adjacent natural stones 13 and the natural stone 13. Subsequently, while maintaining this state, concrete is poured into the internal space of the retaining wall form 33, and this is cured and solidified. As a result, the retaining wall block 30 in which many natural stones 13 are laid on the wall surface
A is placed. After casting, remove the retaining wall form 33,
Transport the obtained retaining wall block 30A to the site by truck,
This is lifted by a crane and installed on site in sequence. In FIGS. 3 and 5, reference numeral 35 denotes a pair of holes for hanging the crane, which are provided at both ends of the back surface of the concrete block 11B.

In this way, the anchor members 31 ... Are inserted into the groove portions 13a.
... is fixed to the wall surface of the concrete block 11B, so that the natural stone 13 ...
Can be more firmly fixed. Further, after inserting the anchor members 31 ... Into the corresponding groove portions 13a ... And connecting the natural stones 13 ... to the assembly rebar 32, concrete is poured into the retaining wall form 33 to retain the natural stones 13 ... Since the natural stones 13 are easily mounted on the retaining wall 30, the construction can be performed quickly and reliably. Further, since the joint stop members 34 are arranged in the gap between the natural stones 13 adjacent to each other and the concrete is poured, when the concrete is poured, the fluidity of the concrete is different from that of the adjacent natural stones 13. Difficult to flow from the gap between the stone 13. Other configurations, operations, and effects are substantially the same as those of the first embodiment, and thus the description thereof will be omitted.

[0020]

According to the invention of claims 1 to 3 , since the anchor member of the assembled rebar is inserted into the groove portion containing the adhesive to fix the natural stone to the wall surface of the concrete secondary product, the concrete secondary The natural stone can be more firmly fixed to the product.

In particular, according to the invention of claim 2 , after inserting each anchor member into the groove and connecting the natural stone to the assembled rebar, concrete is poured into the retaining wall form to form the retaining wall with the natural stone. Since it is placed, natural stones can be easily constructed on the retaining wall, and this construction can be performed quickly and reliably.

Further, according to the invention of claim 3 , since the joint stop member is arranged in the gap between the natural stones and the concrete is poured, when the concrete is poured, the concrete having fluidity is natural. Difficult to flow through the gap between stone and natural stone.

[Brief description of drawings]

FIG. 1 is an enlarged sectional view showing a construction state of a retaining wall according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view of a retaining wall in a construction state according to a second embodiment of the present invention.

FIG. 3 is a cross-sectional view of a retaining wall construction state according to a third embodiment of the present invention.

FIG. 4 is an enlarged front view of a retaining wall according to a third embodiment of the present invention.

FIG. 5 is a perspective view showing an assembling work of natural stones in a retaining wall construction method according to a third embodiment of the present invention.

FIG. 6A is an enlarged plan view showing an assembled state of natural stones in a method of constructing a retaining wall according to a third embodiment of the present invention. (B) is a longitudinal sectional view showing an assembled state of natural stones in a method of constructing a retaining wall according to a third embodiment of the present invention.

[Explanation of symbols]

10, 20, 30 Retaining wall, 11 Concrete canal (concrete secondary product), 11A Machi block (concrete secondary product), 11B Concrete block (concrete secondary product), 12 Adhesive, 13 Natural stone,
13a groove part, 31 anchor member, 32 assembly rebar,
33 Retaining wall formwork, 34 Joint stop member.

Claims (3)

(57) [Claims] 1. A retaining wall in which a large number of natural stones are laid on the wall surface of a concrete secondary product, wherein an assembled rebar in which a plurality of anchor members are planted in a separated state is embedded in the concrete secondary product, Grooves into which the anchor members are inserted are formed at the ends of the individual natural stones. An anchor member is inserted into each groove filled with an adhesive to fix each natural stone to the concrete secondary product. Retaining wall. 2. A step of preparing a large number of natural stones having a groove portion formed at one end thereof, a step of assembling a retaining wall form around a wall surface of a secondary concrete product, and a step of assembling the retaining wall form. A step of arranging an assembled rebar in which a number of anchor members are erected in the internal space, and inserting each of the anchor members into a corresponding groove filled with an adhesive to connect each natural stone to the rebar And the step of pouring concrete into the internal space of the retaining wall formwork,
A method of constructing a retaining wall, which comprises a step of placing a retaining wall in which many natural stones are laid on the wall surface. 3. The method of constructing a retaining wall according to claim 2 , wherein a joint stop member is arranged in a gap between the natural stones, and concrete is poured while maintaining this state.