JP2002105972A - Construction method and structure of retaining wall block in deformed retaining wall section - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide construction method and structure of retaining wall blocks in a deformed retaining wall section or the like which is executable so as to extend along natural undurations of an original ground to be retained. SOLUTION: The construction method is constituted of a construction method in deformed retaining wall or the like including process in which a first retaining block 12 is erected at the slope face side of a retaining wall 10 to be executed, and bundling concrete 16 is placed into the space at the rear side of the first retaining wall blocks 12, and before the bundling concrete 16 is solidified, supporting reinforcements 20 are inserted in the space to solidify the concrete. A second retaining wall block 24 in which fixing receiver reinforcements 22 are protruded is erected at the upper face side of the first retaining wall block 12 and the support reinforcements 20 and the fixing receiver reinforcements 22 are welded fixedly via connecting member 26 while setting the specular face of the second retaining wall block 24 in a specified inclination. The inclination of the second retaining wall block 24 can be set without relation to the inclination of the first retaining wall block.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a construction method and a construction structure of a retaining wall block used for a retaining wall structure such as a road, a river, a dam, and a shore. The present invention relates to a construction method and a construction structure of a retaining wall block in an irregularly shaped retaining wall portion or the like in a case where a wedge-shaped gap is formed in a wall.

[0002]

2. Description of the Related Art Conventionally, in a retaining wall construction method for roads, rivers, dams, shores, etc., a retaining wall block as shown in FIG. 10 is precast-formed at a factory in advance, and is formed along the original ground of the slope. Stacking methods are known. This retaining wall block is precast-molded integrally with the mirror wall so that the mirror wall is aligned just by stacking it to shorten the construction period, and a wide range of slope is close to its average slope as shown in FIG. It is constructed with a constant gradient. Recently, the nature of the surface of the retaining wall has been required to be almost natural from the point of view of landscape protection. For example, a retaining wall block in which a stone surface of natural stone is imitated on a mirror surface as shown in FIG. 13 may be used. is there. This artificial stone retaining wall block is also constructed on a wide range of slopes at a constant gradient close to its average gradient. In the method of stacking these retaining wall blocks, a triangular joint is formed with a conventional retaining wall block in a deformed retaining wall portion in which a wedge-shaped gap is generated between blocks on a curved slope as shown in FIG. The part was finished by plastering work, but only flat finishing could be done by plastering work. In the artificial stone retaining wall block, if the joints are not finished to the split stone surface, the split stone surface will not be a continuously imitated retaining wall,
As shown in FIG. 14 and FIG. 15, the front side of the gap is brought into contact with a front frame plate formed with a split-stone surface mold, and the back frame plate is also brought into contact with the back side, and concrete is driven in place with joints. We are filling.

[0003]

However, in the case of these retaining wall blocks in which the mirror wall and the retaining wall are integrally formed, it is necessary to construct a wide area with a uniform slope, and a complicated undulating retaining wall is constructed. I couldn't. In addition, the plastering work to fill the joints on the irregularly shaped retaining wall requires time and labor, and the construction period is prolonged. In addition, in the artificial stone retaining wall block, the front frame plate is formed by sticking a synthetic resin mold sheet to the plywood, so that the manufacturing cost of the front frame plate itself is high, and it is necessary to arrange and fix the front and rear frame plates. This is a work, which takes man-hours and increases construction costs. Even if the joints are broken at the cost and the stones are finished in this way, the joints where concrete is cast on site have a different color from the retaining wall block, and the color of the retaining wall often becomes mottled. there were. The present invention has been made in view of the above-mentioned conventional problems, and one object of the present invention is to provide natural undulation of the original ground to be defended by stacking while defending the slopes of the mirror walls of the retaining wall blocks variously on site. When the rectangular retaining wall blocks are piled up, it is not necessary to perform joint filling work to fill the gaps with concrete even in the irregularly shaped retaining wall where a wedge-shaped gap occurs between the left and right adjacent blocks, further,
An object of the present invention is to provide a construction method and a construction structure of a retaining wall block in a deformed retaining wall portion or the like that can form the entire retaining wall as a natural continuous surface of the same color.

[0004]

According to the present invention, a first retaining wall block is provided on a side face of a retaining wall to be constructed, and a back mold and a first retaining wall block are provided. 12
And the supporting rebar 20 is inserted into the stuffing concrete 16 and solidified while the stuffing concrete 16 does not solidify. The second projecting
The retaining wall block 24 is supported upright on the upper surface side of the first retaining wall block 12, and in this state, the supporting reinforcing bar 20 and the fixed receiving reinforcing bar 22 are connected while the mirror surface of the second retaining wall block 24 is set to a required gradient. 26, and is constructed by a method of constructing a retaining wall block in an irregularly shaped retaining wall portion including a step of casting a concrete 16 between the back formwork 14 and the second retaining wall block 24 by welding. You.

The mirror surfaces of the retaining wall blocks 12 and 24 may be precast in advance so as to form the split stone surface 34.

Alternatively, the precast retaining wall blocks 12, 24 may be cut and constructed according to the fitting shape of the retaining wall to be constructed.

[0007] In order to achieve the above object, the present invention provides a first retaining wall block 12 on the side of a retaining wall 10 to be constructed.
The first retaining wall block layer 18 in which the concrete 16 is cast between the back formwork 14 and the first retaining wall block 12, and the concrete 16 in the first retaining wall block layer 18. The first reinforcing wall block is composed of a supporting reinforcing bar 20 inserted into the stuffed concrete 16 and solidified and fixed before solidification, and a second retaining wall block 24 in which a fixing receiving reinforcing bar 22 is projected from an arbitrary portion on the back side in advance. 12 on the top side of the second
The supporting reinforcing bar 20 and the fixed receiving reinforcing bar 22 are welded and fixed via the connecting member 26 while the mirror surface of the retaining wall block 24 is set at a required gradient, and the body is placed between the back formwork 14 and the second retaining wall block 24. And a second retaining wall block layer 28 in which the concrete 16 is cast and solidified.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of a method for constructing a retaining wall block (hereinafter referred to as a "construction method") and its construction structure (hereinafter referred to as a "construction structure") in a modified retaining wall portion of the present invention with reference to the accompanying drawings. Embodiments will be described.
The construction method and construction structure of the present invention is a retaining wall in which a retaining wall block precast in a factory or the like is carried into a construction site, and a plurality of retaining wall block layers are stacked and constructed on the side of the retaining wall 10 to be constructed. Construction method and construction structure.

As shown in FIG. 1, FIG. 6 to FIG. 8, the construction of the retaining wall block in the modified retaining wall portion or the like according to the present embodiment comprises a first retaining wall block on the slope side of the retaining wall 10 to be constructed. 1
2, the first retaining wall block layer 18 in which the concrete 16 is cast between the back formwork 14 and the first retaining wall block 12, and the concrete 16 of the first retaining wall block layer 18. The first retaining wall comprises a supporting reinforcing bar 20 which is inserted into the stuffed concrete 16 and solidified and fixed before solidification, and a second retaining wall block 24 in which a fixing receiving reinforcing bar 22 is projected in advance at an arbitrary portion on the back side. The supporting reinforcing bar 20 and the fixed receiving reinforcing bar 22 are welded and fixed via the connecting member 26 while the mirror surface of the second retaining wall block 24 is set at a required gradient by being erected on the upper surface side of the block 12, and the back mold 14 and the A second retaining wall block layer 28 in which the concrete 16 is cast and solidified in the middle of the second retaining wall block 24.

The first retaining wall block 12 and the second retaining wall block 24 are retaining wall blocks constructed vertically on the retaining wall 10. For example, when the three retaining wall blocks are viewed vertically adjacent to each other, the central retaining wall block is the first retaining wall block 12 for the upper retaining wall block and the first retaining wall block 12 for the lower retaining wall block. On the other hand, it becomes the second retaining wall block 24. In the portion where the lowermost and uppermost stages and the drainage grooves and the like are provided in the retaining wall 10, a retaining wall block formed in a special shape as appropriate may be used.
The retaining wall block 12 and the second retaining wall block 24 are formed of exactly the same block member.

FIGS. 2 to 4 show the first retaining wall block 12 or the second retaining wall block 24 of the present embodiment. As shown in the figure, the retaining wall block 12 (24) is a plate-like concrete member, and has a plate-like block body 30;
Fixed receiving reinforcing bar 22 protruding from the back surface of block body 30
And The block body 30 is formed to have a thickness that can be easily cut by a hand-held circular saw concrete cutter or the like.
Has been arranged.

The fixed receiving reinforcing bar 22 protruding from the back surface side of the block body 30 is a solid bar having a solid cross section having a required length, and portions generally used for concrete reinforcement are formed in a node-like manner. It is formed by cutting a swelled and expanded steel bar to a required length. One end of the fixed receiving reinforcing bar 22 protrudes into the concrete plate thickness of the block body 30, and the other end is fixed so as to project substantially perpendicularly to the back surface of the block body 30. As shown in FIG.
2. . . Are provided on a substantially entire area of the back surface of the block main body 30 at required intervals, and as shown in FIG. 5, even when the block main body 30 is cut into an appropriate shape as required, a fixed receiving reinforcing bar is used on the block side to be used. 22. . . Is to remain.

As shown in FIG. 2 and FIG.
22. Fixed receiving reinforcing bar on the back side . . Hanging hook 3 between
6. . . Is provided. Hanging hook 36. . . Reference numeral denotes a hook member that locks a hook or a wire shackle of a hanging wire extended from the crane when the retaining wall block is carried by the crane or the like.

As shown in FIGS.
On the front side surface, ie, the mirror surface of the retaining wall block 12 (24), a split stone surface 34 imitating a natural stone split surface is precast. The retaining wall block 12 (24) includes a lattice reinforcing bar 32, a fixed receiving reinforcing bar 22, and a hanging hook 3 in a precast mold (not shown) in which a mold of a split stone surface 34 is formed on the bottom surface.
6 and the like are arranged by an appropriate method, and concrete is poured and precast molding is performed.

FIG. 6 is a front view showing the state of construction of a modified retaining wall portion in which a wedge-shaped gap is formed between blocks when a retaining wall block having a rectangular mirror surface is arranged in the retaining wall 10. As shown in this figure, each retaining wall block at the deformed retaining wall. . .
The block body 30 of (24 ...) is additionally machined according to the fitting shape of the retaining wall to be constructed. For example, as shown in Fig. 5, the block body 30 is cut into a trapezoidal shape from a rectangular shape at the time of precasting. It has been processed. Each retaining wall block 1
2. . . (24 ...) is a block body 30 which is a mirror wall
In this case, the retaining wall block can be laid without gaps even in the irregularly shaped retaining wall portion by simply cutting the joint, and the joint filling work for finishing the gap portion later is not necessary. The cutting as shown in FIG. 5 can be easily performed using a hand-held type concrete cutter.
In addition, each retaining wall block 12. . . (24 ..) will be performed without cutting if not necessary.

As shown in FIGS. 1 and 8, the supporting reinforcing bar 20 is a solid bar having a required length and a solid cross section, and is generally used for reinforcing concrete in the same manner as the above-mentioned fixed receiving reinforcing bar 22. The steel bar is cut to the required length and formed. The supporting rebar 20 has its lower end pierced into the stuffed concrete 16 of the first retaining wall block layer 18 before solidification, and is completely planted and fixed by solidification of the concrete.

The concrete filling 16 of the first retaining wall block layer 18 has at least a supporting reinforcing bar 20 inserted before solidification.
Is injected at a depth that can be erected with the required strength after solidification. Supporting rebar 2 fixed to stuffing concrete 16
0. . . The length, the number, the position, etc. of the protrusions may be appropriately set according to the shape and size of the second retaining wall block 24 fixedly supported. That is, at the stage when the first retaining wall block layer 18 has been constructed, the construction state of the second retaining wall block layer 24 is estimated, and the necessary number of supporting rebars 20. . . Just insert it. The insertion position may be roughly estimated, and the shape of the second retaining wall block 24 will be described later.
After the position, gradient, etc. are accurately determined, each connecting member 2
6. . . It can be handled by adjusting the length and direction of welding.

Connecting member 26. . . Is a straight bar having a solid section with a required length, which is formed by cutting a steel bar generally used for concrete reinforcement to a required length, similarly to the fixed receiving reinforcing bar 22. As shown in FIG. 1, both ends of the connecting member 26 are fixedly supported by the reinforcing steel 22 and the supporting reinforcing steel 20.
And are respectively fixed by welding. In FIGS. 1 and 8, the second retaining wall block 24 includes fixed receiving reinforcing bars 2 near four corners.
2. . . Connecting members 26. . . Are welded at one end, and four supporting rebars 26. . . The two connecting members 26, 26 on the left and right sides are combined and welded and fixed to the two supporting reinforcing bars 20, 20, respectively.

That is, a fixed receiving reinforcing bar 22 on the back surface of the second retaining wall block 24 and a supporting reinforcing bar 20 fixed to the first retaining wall block layer 18 at the stage when the construction of the first retaining wall block layer 18 is completed. The second retaining wall block 24 is positioned at a required position immediately above the first retaining wall block layer 18 in a required posture by being integrally welded and fixed together with the connecting member 26 to which these are applied while adjusting the mutual position. Fixedly held.

In FIG. 1, the second retaining wall block 24 is installed upright at the same gradient as the first retaining wall block 12, and the respective connecting members 26. . . Are formed to have a required length in accordance with the length of the supporting reinforcing bar 20 and the fixed receiving reinforcing bar 22.
The second retaining wall block 24 is fixed and held by further finely adjusting the gradient of the second retaining wall block 24 by welding and fixing at an intermediate position protruding further.

The inclination of the second retaining wall block 24 and that of the first retaining wall block 12 and the left and right adjacent retaining wall blocks are made different from each other by appropriately setting the length and the welding position of the connecting member 26. Since it is easy to cut the second retaining wall block 24 so that no gap is formed between the blocks in a state where the gradient is different, FIG.
Can be constructed in a state in which only the mirror surface of the retaining wall block, that is, only the precast crushed stone surface 34 is continuous.

The second retaining wall block layer 28 is formed by casting and solidifying the concrete filling 16 between the second retaining wall block 24 and the back mold 14 held upright. When a further retaining wall block layer is to be constructed on the second retaining wall block layer 28, the supporting reinforcing bar 20 is inserted and solidified before the solidified concrete of the second retaining wall block layer 28 solidifies, and the upper retaining wall is formed. It can be formed as the first retaining wall block layer 18 for the block layer.

Also, in FIG. 1, the concrete 16 of the first retaining wall block layer 18 is replaced with the first retaining wall block 12.
And the lower half of the support bar 20 which is not too long is inserted. For example, the concrete filling of the first retaining wall block layer 18 is carried out at the intermediate height of the first retaining wall block 12. The second retaining wall block 24 is fixed by stopping and inserting the longer supporting reinforcing bar 20 and welding to the connecting member 26, and the concrete 1 of the second retaining wall block layer 28 is packed.
6, the lower part of the concrete in the second retaining wall block layer 28 is inserted into the back surface of the first retaining wall block 12, and the concrete in the first retaining wall block layer 18 and the second retaining wall are inserted. The boundary surface between the wall block layer 28 and the stuffed concrete may be shifted below the boundary between the first retaining wall block 12 and the second retaining wall block 24 to improve the strength of the retaining wall.

Next, a method for constructing the retaining wall 10 according to the present embodiment will be described. Each of the retaining wall blocks 12 (24) is pre-cast at a factory or the like so as to form a split surface 34 on a mirror surface, and is carried into the site. At the site, as shown in FIG. 7, the back formwork 14 is installed from the original ground of the slope at intervals so that crushed stones can be backed in as necessary, and the retaining wall to be constructed as shown in FIG. 10 A first retaining wall block 12 is erected on the side of the slope, and a concrete filling 16 is poured between the back formwork 14 and the first retaining wall block 12. The supporting rebar 20 is inserted into the confined concrete and solidified. The position and number of the support reinforcing bars 20 to be inserted may be appropriately set while estimating the width of the second retaining wall block 24 to be constructed next, and may be flexibly adapted.

Next, if necessary, the precast second retaining wall block 24 is cut on site. First, the fitting shape when the retaining wall block is to be installed at the planned design gradient on the retaining wall to be constructed is measured, and based on this, the retaining wall block formed into a rectangular shape by precasting as shown in FIG. Cut into different shapes such as. In this way, the construction of the retaining wall block can be performed while making additional adjustments at the site, so there is no gap between the laid retaining wall blocks, that is, troublesome joint filling work and color differences at joints also occur do not do.

Next, as shown in FIG. 7 (a), a second retaining wall block 24 having a fixed receiving reinforcing bar 22 projecting therefrom in advance is held upright at a portion on the back side, and as shown in FIG. 7 (c). In this state, the supporting reinforcing bar 20 and the fixed receiving reinforcing bar 22 are connected to the connecting member 26 while the mirror surface of the second retaining wall block 24 is set at a required gradient.
Then, the concrete filling 16 is cast between the second retaining wall block 24 and the back formwork 14 which are thus erected and held.

Connection member 26. . . By adjusting the length and the welding position, the inclination of the mirror surface of the second retaining wall block 28 can be adjusted at the construction site. Also, the slope is different from the first retaining wall block 12 and other retaining wall blocks adjacent to the left and right,
Since it is easy to cut and deform the second retaining wall block 24 to have a different shape corresponding to it, even if the retaining wall 10 is complicatedly undulated as shown in FIG. Only the processed broken stone surface can be constructed in a continuous state, no troublesome joint filling work is required, and a continuous natural surface texture without partial color change can be achieved.

The lowermost portion of the retaining wall 10 (not shown) is solidified by inserting a supporting reinforcing bar 20 when the foundation concrete is poured into the ground, and using this supporting reinforcing bar, a construction method similar to that of the intermediate portion is used. In the uppermost stage (not shown), a pillar such as a guardrail or a traffic sign may be erected when the concrete is poured.

[0029]

As described above, according to the method for constructing a retaining wall block in a modified retaining wall portion or the like of the present invention, the first retaining wall block is erected on the side of the retaining wall to be constructed, and the back formwork is formed. Pile concrete is placed between the concrete block and the first retaining wall block, and while the concrete is not solidified, a supporting reinforcing bar is inserted into the concrete to be solidified and solidified in advance, and is fixed to an arbitrary portion on the back side in advance. The second retaining wall block having the reinforcing bars protruded is supported upright on the upper surface side of the first retaining wall block, and in this state, the supporting reinforcing bar and the fixed receiving reinforcing bar are set while the mirror surface of the second retaining wall block is set to a required gradient. Is welded and fixed via a connecting member, and the concrete poured into the space between the back formwork and the second retaining wall block is cast. Just plug in before solidifying It is possible to adjust the slope of the second retaining wall block on site by simply welding the supporting reinforcing bar fixed by a simple operation, the fixing receiving reinforcing bar of the second retaining wall block and the connecting member at appropriate mutual positions. It is possible to construct a single type of retaining wall block at various slopes while using a block stacking method that requires a short working time, so that a natural retaining wall reflecting the undulation of the original ground can be constructed. In addition, since it is possible to construct each retaining wall block simply by cutting it and reworking it into a different shape without creating a gap between the retaining wall blocks, troublesome filling work is not required, and the color of the retaining wall is different due to the different colors at the joints. There is no dapple. Further, since the supporting rebar and the connecting member may be simple bars, they can be manufactured at low cost simply by cutting a commercially available long bar.

Also, since the mirror surface of each retaining wall block is precast in advance to form a split stone surface,
As a whole, it is possible to realize a retaining wall constructed in a state close to a natural landscape in which a fine split-stone surface is formed on the surface while undulating naturally, with a short construction period and a low construction cost.

Also, since the precast retaining wall block is cut and constructed according to the fitting shape of the retaining wall portion to be constructed, for example, when a rectangular precast molded retaining wall block is arranged. Even if the retaining wall block has a wedge-shaped gap between the retaining wall blocks, the retaining wall block can be cut into an irregular shape such as a trapezoid, etc. It is not necessary to perform a troublesome work of filling the joints in the gaps, and the entire retaining wall can be constructed to have a continuous surface of a split stone surface having no partial color difference.

Further, according to the construction structure of the retaining wall block in the modified retaining wall portion or the like of the present invention, the first retaining wall block is erected on the side of the retaining wall to be constructed, and the back formwork and the first retaining wall are formed. A first retaining wall block layer in which the stuffing concrete is cast in the middle of the block, and a supporting reinforcing bar inserted into the stuffing concrete and solidified and fixed before solidification of the stuffing concrete in the first retaining wall block layer. The second retaining wall block, in which a fixed receiving reinforcing bar is projected from an arbitrary portion on the back side in advance, is erected on the upper surface side of the first retaining wall block, and the mirror surface of the second retaining wall block is set at a required gradient and supported. A second retaining wall block layer in which the reinforcing bar and the fixed receiving reinforcing bar are welded and fixed via a connecting member, and the concrete is cast and solidified between the back mold and the second retaining wall block. From the back of the first retaining wall block The slope of the second retaining wall block can be reduced by simply welding the supporting reinforcing bar fixed by a simple work of inserting just before the REIT is solidified, the fixing receiving reinforcing bar of the second retaining wall block and the connecting member at appropriate mutual positions. It can be constructed while adjusting it on site, and one type of retaining wall block can be constructed at various slopes. Can be constructed. In addition, since it is possible to construct each retaining wall block simply by cutting it and reworking it into a different shape without creating a gap between the retaining wall blocks, troublesome filling work is not required, and the color of the retaining wall is different due to the different colors at the joints. There is no dapple. Further, since the supporting rebar and the connecting member may be simple bars, they can be manufactured at low cost simply by cutting a commercially available long bar.

[Brief description of the drawings]

FIG. 1 is an explanatory side cross-sectional view of a partly omitted construction of a retaining wall according to an embodiment of the present invention.

FIG. 2 is a side view of a retaining wall block used for the retaining wall.

FIG. 3 is a front view of a retaining wall block used for the retaining wall.

FIG. 4 is a rear view of a retaining wall block used for the retaining wall.

FIG. 5 is an explanatory view showing a state in which a retaining wall block used for the retaining wall is additionally cut and processed.

FIG. 6 is a front view of the retaining wall during construction.

FIGS. 7A, 7B, and 7C are explanatory views showing step by step the construction method of the retaining wall.

FIG. 8 is a plan view of the retaining wall during construction.

FIG. 9 is an explanatory perspective view of the retaining wall.

FIG. 10 is a perspective view showing a retaining wall block used for a conventional retaining wall.

FIG. 11 is a perspective view of a conventional retaining wall.

FIG. 12 is a perspective view of a conventional curved retaining wall.

FIG. 13 is a perspective view showing a retaining wall block imitating a split stone surface of natural stone.

FIG. 14 is an explanatory side sectional view of a retaining wall block imitating a split stone surface during construction.

FIG. 15 is a plan view in the middle of construction of a retaining wall block imitating a split stone surface.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Retaining wall 12 1st retaining wall block 14 Back formwork 16 Body concrete 18 1st retaining wall block layer 20 Supporting reinforcement 22 Fixed receiving reinforcement 24 Second retaining wall block 26 Connecting member 28 2nd retaining wall block layer 34 Split stone surface

Claims (4)

[Claims] 1. A first retaining wall block is erected on the slope side of a retaining wall to be constructed, and concrete is poured between the back formwork and the first retaining wall block so that the concrete does not solidify. A supporting reinforcing bar is inserted into the stuffed concrete and solidified, and a second retaining wall block in which a fixed receiving reinforcing bar is protruded at an arbitrary portion on the back side in advance is supported on the upper surface side of the first retaining wall block. In this state, the supporting reinforcing bar and the fixed receiving reinforcing bar are welded and fixed via the connecting member while the mirror surface of the second retaining wall block is set at a required gradient, and the back reinforcing frame and the second retaining wall block are interposed between the back mold and the second retaining wall block. A method for constructing retaining wall blocks in deformed retaining walls, including the step of casting concrete. 2. The method according to claim 1, wherein a mirror surface of each retaining wall block is precast to form a split stone surface. 3. The method according to claim 2, wherein the precast retaining wall block is cut and constructed in accordance with the fitting shape of the retaining wall to be constructed. 4. A first retaining wall block layer in which a first retaining wall block is erected on a slope side of a retaining wall to be constructed, and concrete is poured between the back formwork and the first retaining wall block. And a supporting reinforcing bar inserted into the stuffed concrete and solidified and fixed before solidification of the stuffing concrete of the first retaining wall block layer, and a second fixing reinforcing bar projecting in advance at an arbitrary portion on the back side. The supporting reinforcing bar and the fixing receiving reinforcing bar are welded and fixed via the connecting member while the mirror wall of the second retaining wall block is set to a required gradient with the retaining wall block standing on the upper surface side of the first retaining wall block, and A construction structure of a retaining wall block in a deformed retaining wall portion or the like including a second retaining wall block layer in which concrete is poured and solidified in the middle of the second retaining wall block.