JPH06108483A - Stacking of retaining/wall and concrete block for retaining wall - Google Patents

Abstract

PURPOSE:To extremely simply joint reinforcing steel rods of the upper and lower retaining blocks without slipping out and safely and efficiently construct the structure, by forming recessions at the uppermost face, the lowermost face, or both faces of the rear counterfort of the retaining block. CONSTITUTION:In a retaining wall block 1 composed of the front wall and the counterfort 2 protruding to the rear side, which are constructed on a foundation concrete while vertically connecting and stacking blocks, appropriate numbers of recessions 3 are formed at the uppermost face or the lowermost face or both faces of the counterfort 2. Retaining blocks 1 are jointed through a jointing tool at the recession 3 and vertically stacked.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of stacking retaining walls such as river bank construction, dam construction, and residential land construction, and a concrete block for a retaining wall used for this method.

[0002]

2. Description of the Related Art Conventionally, as a method for stacking this kind of retaining wall and a concrete block for a retaining wall used for this, a retaining wall block having a small U-shaped cross section and an L-shaped retaining wall block for a secondary concrete product are used. The retaining wall is constructed by or the retaining wall is constructed in-situ. In addition, on the foundation block, a large retaining wall block consisting of a front wall and a retaining wall projecting from the rear side is stacked to construct a retaining wall, and the stacking portion of each large retaining wall block and the laterally connected portion It is known that the joint is filled with fresh concrete and fixed, and further, reinforcing bars are planted on the concrete for reinforcement for connection.

[0003]

However, in the above-mentioned prior art, in the case of a small and simple U-shaped retaining wall block having a small cross section, the small block itself (for example, 42 × 28 ×) is used.
Since 35 cm is piled up, many blocks have to be handled, which is very troublesome. Moreover, the number of workers who can stack blocks is decreasing at the present when mechanical construction is advanced. In addition, a large L-shaped retaining wall can be constructed by a machine (crane), and is more efficient than one that stacks U-shaped retaining wall blocks in cross section. However, even though it is large, the height is limited to a maximum of about 4 m, and if the height is also high in manufacturing at the factory, the production efficiency will be reduced and transportation and handling will be limited. Moreover, it may not be possible to carry out construction on a narrow site or in a site where large cranes cannot be entered. Furthermore, as compared with the above-mentioned ones, the cast-in-place retaining wall has a longer curing period of concrete, so that it takes time to complete it. Also, in the case of building a retaining wall by stacking large retaining wall blocks, fresh concrete is filled and fixed in the joints of the gaps stacked up and down, and a product with a "U-shaped cross section" is provided for reinforcement. When the deformed steel bar firmly planted in the basic concrete has a length equivalent to 2 to 5 stacks because the notched part surrounding the deformed steel bar (corresponding to the reinforcing bar) was only provided, the retaining wall block Must be raised higher than the length of the deformed steel bar and vertically lowered so as to hold the deformed steel bar, and the work vehicle must be guided under the heavier retaining wall block to guide the product. Since it is caught on the deformed steel bar and does not descend smoothly, the worker must work in an extremely dangerous state. For this reason, it is unavoidable that many deformed steel bars are cut to the length of one retaining wall block + the height of alpha, and each time the retaining wall blocks are stacked, additional deformed steel bars are added by welding, etc. I was going to proceed. However, at this time, the addition by welding etc. will be performed at the part of the length + alpha of the deformed steel bar, but a part of the retaining wall block will be scraped off for this addition, or welding work or the retaining wall block It was necessary to add gaps between the upper and lower retaining wall blocks with a gap between them, with the body slightly floating. Moreover, after stacking several retaining wall blocks, it becomes a weld for work at high places, which is still dangerous and it is difficult to guarantee complete work, so even the safety of retaining wall blocks is questioned. . The above conventional technique increases the amount and weight of the retaining wall block, and causes many inconveniences in various aspects of production, transportation, cargo handling, and construction. That is, in mountainous areas and the like, there is a problem in that a great amount of cost is required for construction of a product loading path and an extremely large crane is required for stacking these. In view of such circumstances, the present invention solves the above-mentioned drawbacks of the prior art and, by a simple configuration, stacks a few retaining wall blocks in several stages and uses the recesses formed between the upper and lower portions of each retaining wall block to perform welding. The retaining wall can be constructed while connecting such as. Then, the concave portion is filled with the concrete so as to cover the connected portion, thereby forming a retaining wall in which all retaining wall blocks are integrated. It is an object of the present invention to provide a method for stacking retaining walls that does not cause such a shift and a concrete block for a retaining wall used for this method.

[0004]

The present invention is intended to solve the above-mentioned problems, and employs the following technical means. In the invention according to claim 1, in a method of constructing a retaining wall by stacking vertically on a concrete foundation,
An appropriate number of recesses are formed on the upper end surface, the lower end surface, or the upper and lower end surfaces of the retaining wall of the retaining wall block consisting of the front wall and the retaining wall projecting from the rear portion, and the connection is made by using the recesses. Or, the construction technology means of connecting the reinforcing bars attached to each retaining wall block by welding, then filling with fresh concrete, and stacking the retaining wall blocks was adopted.
In the invention according to claim 2, in the concrete block for a retaining wall, the retaining wall is constructed by vertically stacking the retaining concrete on the foundation concrete to construct a retaining wall, and includes a front wall and a retaining wall projecting from the rear portion. In the retaining wall block, a technique in which a proper number of recesses are formed on the upper end surface, the lower end surface, or the upper and lower end surfaces of the buttress wall, and the retaining wall blocks are connected to the recesses while being stacked vertically through a connecting tool. Adopted means.

[0005]

By adopting the above technical means, the present invention has a simple structure and is capable of stacking the retaining wall blocks in the vertical direction so that the retaining wall blocks have an upper end face, a lower end face, or an upper and lower face of the retaining wall. When a recess is formed on the end face and a connecting tool such as a reinforcing bar is planted therein and the upper and lower retaining wall blocks are stacked, the connecting tools provided on the buttress wall are connected by welding or other fixing tools. . Then, after this connection is completed, fresh concrete is filled and fixed. In this way, when building the retaining wall in layers, it is not necessary to raise the height of the reinforcing bar, so it is possible to easily stack from the side without raising the retaining wall block to be stacked up to the top of the reinforcing bar. With the help of welding, there is no danger of connecting work, and you can proceed safely and easily.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the accompanying drawings. The embodiment shown in FIG. 1 is a schematic side view showing a first embodiment according to the present invention in which large-sized concrete blocks for a retaining wall are vertically stacked in a row, and 1 in the figure is a retaining wall block. Reference numeral 2 is a retaining wall projecting from both sides of the rear surface of the retaining wall block 1. The one shown here has a U-shaped cross section. However, as long as the retaining wall 2 protruding from the rear portion of the front wall of the retaining wall block 1 is formed, various cross-sectional shapes such as a T shape and a comb tooth shape can be selected. The retaining wall block 1 of the one closer to the side of the foundation concrete 6 may have a longer retaining wall 2 and may be shorter as it goes upward. This length can be variously selected in terms of strength. An appropriate number of recesses 3 (the shape is arcuate, elliptical, rectangular, or the like, upper and lower rebars are welded or rebar Various shapes can be used as long as they are made of spiral rebar and provided with a space where it is easy to work by screwing and connecting with a coupler). In this embodiment, a recess 3 is formed in the lower end surface of the buttress 2, and the recess 3 is stacked. The L-shaped spiral reinforcing bar 7 embedded in the basic concrete 6 and the spiral reinforcing bar 4 inserted in the hole 5 are formed in the upper portion of the recess 3 by forming a hole 5 into which the spiral reinforcing bar 4 can be guided and inserted. The concave portion 3 is screwed and coupled with a coupler 8 or the like (see FIG. 3 for details), and then the concrete is filled and fixed. Then, the second-stage retaining wall blocks 1 are stacked, and the upper end of the spiral reinforcing bar 4 inserted in the hole 5 formed in the retaining wall 2 of the first-stage retaining wall block 1 and the second stage The spiral reinforcing bar 4 inserted into the hole 5 formed in the eye retaining wall 2 is screwed and connected in the concave portion 3 with a connecting tool such as a coupler 8 in the same manner as described above, and fixed by filling with fresh concrete. . By repeating this, the retaining wall blocks 1 are sequentially stacked to construct a retaining wall.
It should be noted that recesses and protrusions are formed on the upper and lower surfaces of the retaining wall block 1 so as to guide the connection in the vertical direction so that they can be fitted to each other. Next, a second embodiment will be described with reference to FIGS. The difference from the first embodiment shown in FIGS. 1 to 3 is that the recess 3 provided in the retaining wall 2 of the retaining wall block 1 is different.
However, since the reinforcing bars 9 and the points provided on the upper and lower end surface portions are not spiral reinforcing bars, the connection is made by welding rather than by a coupler such as a coupler. Except for these points, it is the same as the first embodiment of FIGS. In addition, in (A), (B), (C), (D), and (E) shown in FIG. 6, in welding, the intermediate member 10 that connects the upper and lower rebars 9 is
One is welded, and (B) is welded via two left and right.
(C) shows an example in which the intermediate member 10 covers almost half of the reinforcing bar 9, and (D) is an application example of (C) with an arc along the reinforcing bar 9. (E) is to weld together with the same material as the reinforcing bar 9. As described above, various things are conceivable for welding and connecting the reinforcing bars 9. 7,
What is shown in FIG. 8 is the third embodiment. This is a structure in which a connecting plate 13 having holes 15 for bolts is provided in the recesses 3 of both retaining walls 2 of the retaining wall block 1, and both ends of the connecting plate are bent in a U-shape to retain the retaining wall. It is embedded in the block and its end is welded to a rebar piece 9 for strengthening the fixing in the retaining wall block. On the other hand, an insert insertion hole 11 is provided in advance on the upper end surface of the retaining wall of the retaining wall block. When the insert 12 is driven into the insert insertion hole at the time of connection, the upper retaining wall block is superposed and then the upper retaining wall block is overlapped. By fixing the upper and lower retaining wall blocks by screwing the bolts 14 into the inserts through the bolt holes 15 of the connecting plate provided in the recess 3 of the wall block, the retaining wall block 1
Is built up and down. The other points are the same as those in the first embodiment. When specifically constructing a retaining wall using the retaining wall block 1 configured as described above, for example, height 1 m, length 2 m, buttress length 1 m to 2
The m-shaped U-shaped retaining wall blocks 1 are lined up on the foundation concrete made by casting in situ, and the retaining wall blocks 1 with the length of the retaining wall 2 adjusted according to the height to be stacked are stacked. Reinforcing bars are connected by a connecting tool or welding using the recess 3 provided in the buttress wall 2. Then, the fresh concrete is poured into the gap, and when the fresh concrete is solidified, the upper and lower retaining wall blocks are integrated to function as a retaining wall. In addition, if the bottom of the buttress is piled up as a reference, a stair-like portion will be formed, and the portion can be filled with soil and a plant can be planted. In this way, when a predetermined number of steps are piled up, between the vertical groove for retaining plate insertion provided on both outer sides near the rearmost part of the retaining wall block 1 and the vertical groove for retaining plate insertion of the retaining wall block 1 installed adjacently. Then, by inserting a stop plate made of striped steel plate, etc., and then filling the concrete around the reinforcing bars, the structure to be constructed becomes more stable.

[0007]

As a result of adopting the above configuration, the present invention provides
The following effects can be obtained. (1) Since the recess is formed on the upper end surface, the lower end surface, or the upper and lower end surfaces of the retaining wall at the rear of the retaining wall block, the reinforcing bars of the upper and lower retaining wall blocks can be connected very easily. Therefore, the efficiency of construction can be improved. (2) By stacking a few retaining wall blocks,
A retaining wall can be built. (3) Because of the above effects, the construction work of the retaining wall can be performed safely, efficiently, and inexpensively.

[Brief description of drawings]

FIG. 1 is a schematic side view showing a stack of concrete blocks for a retaining wall according to a first embodiment of the present invention.

FIG. 2 is a schematic front view showing a concrete block for a retaining wall at a lowermost stage in the first embodiment.

FIG. 3 is a detailed explanatory view of a connecting portion in the first embodiment.

FIG. 4 is a schematic side view showing a stack of concrete blocks for a retaining wall according to a second embodiment of the present invention.

FIG. 5 is a schematic perspective view showing a concrete block for a retaining wall at the lowermost stage in the second embodiment.

FIG. 6 is a schematic explanatory view showing a specific example of a welded joint portion in the second embodiment.

FIG. 7 is a schematic perspective view showing a retaining wall of a concrete block for a retaining wall in an enlarged manner according to a third embodiment of the present invention.

FIG. 8 is a detailed explanatory view of a connecting portion of the third embodiment.

[Explanation of symbols]

1 Retaining wall block 2 Retaining wall 3 Recess 4 Recess 4 Spiral rebar 5 Hole 6 Concrete foundation 7 L-shaped spiral rebar 8 Coupler 9 Reinforcing bar 10 Intermediate member 11 ... Insert insertion hole 12 ... Insert 13 ... Connection plate 14 ... Bolt 15 ... Bolt hole

Claims (2)

[Claims] 1. A method of constructing a retaining wall by vertically stacking on a concrete foundation while vertically connecting the retaining walls, the upper end surface of the retaining wall of a retaining wall block comprising a front wall and a retaining wall projecting from the rear portion of the retaining wall. , Or a suitable number of recesses are formed on the lower end surface or upper and lower end surfaces, and the recesses are used to connect with a connecting tool, or the reinforcing bars attached to each retaining wall block are connected by welding, and then the ready-mixed concrete is added. Retaining wall stacking method characterized by filling and stacking retaining wall blocks. 2. A retaining wall block comprising a front wall and a retaining wall projecting from the rear portion of the retaining wall, wherein the retaining wall is constructed by vertically stacking on a concrete foundation while stacking vertically, and the upper end surface of the retaining wall. Alternatively, a suitable number of recesses are formed on the lower end surface or the upper and lower end surfaces, and the retaining wall blocks can be connected to the recesses while being stacked vertically through a connecting tool, so that the retaining wall block can be connected. .