JP6698052B2 - Block unit for retaining wall and retaining wall - Google Patents

Description

  The present invention relates to a retaining wall block unit and retaining wall constructed to protect slopes such as slopes, cliffs, and embankments in civil engineering works such as residential land, roads, railroads, rivers, and coasts.

  Retaining walls will be constructed to protect the slopes such as slopes, cliffs, and embankments by civil engineering work such as residential land and roads. When constructing a retaining wall, a method of stacking concrete retaining wall blocks is known. The retaining wall block is, for example, a front wall that is a mirror surface and a rear wall that is arranged so as to face the front wall are integrally coupled by a coupling material, and after the retaining wall blocks are stacked, the front wall and the A concrete wall is cast between the rear wall and the rear wall to form an integrated retaining wall, which maintains its strength. Since the distance between the front wall and the rear wall is changed according to the site conditions such as the slope, when it is attempted to manufacture a plurality of types of retaining wall blocks having different distances and connecting members of different lengths, the respective types of There is a problem that a frame is required, the process is complicated, the efficiency is low, the manufacturing cost is high, and the management of the form and block is complicated.

  With respect to such a problem, for example, in Patent Document 1, focusing on reducing the cost of the mold for manufacturing and reducing the storage space, a front wall, a rear wall, and these that constitute the retaining wall block There has been proposed a large retaining wall block in which each part of a connecting portion for connecting the above is an independent concrete product which is connected by screwing and fixing each other. In the large retaining wall block of Patent Document 1, a rectangular front wall, a rectangular rear wall arranged to face the front wall, and the front wall and the front wall provided between the front wall and the rear wall. A connecting portion for connecting the rear wall to each other, the front wall, the rear wall, and the connecting portion having a connecting portion that can be screwed by a bolt, and the connecting portion has two plate-like connecting portions. The connecting member is erected on the left and right sides of the front wall and the rear wall with the plane direction of the connecting member as a vertical direction, and the front and rear end surfaces of the connecting member are connected to the front wall by the connecting portion. The back wall is configured to be in contact with and connected to the rear wall.

JP, 2005-190196, A

  In the large retaining wall block of Patent Document 1, a plurality of connecting portions of the front wall, the rear wall, and the connecting material are internally provided on the front and rear end surface sides of the connecting material, and the male screw of the bolt is projected from the front and rear end surface sides. A possible metal flange portion, and a plurality of metal insert portions that are internally provided on the contact surface sides of the front wall and the rear wall with which the connecting member abuts and that form a female screw of the bolt. In addition, the flange part is composed of a U-shaped frame material and a rod-shaped flange reinforcing material, and the insert part is a tubular shape with an internal thread formed with one end being an opening and the other end being a bottom part. And a rod-shaped insert reinforcing material. Therefore, the structure of the connecting portion is complicated, the number of parts is large, high accuracy is required for setting the installation position between each member, the manufacturing cost is high, and the front wall, the rear wall, and the connecting member are connected. In the work, it is necessary to put the bolts in the narrow bolt space of the U-shaped flange portion of the connecting portion for fastening operation, so that there is a problem that the work is difficult to perform, and labor and time are required. In addition, the weight of the large retaining wall block was increased to maintain its strength, and the workability and transportation efficiency on site were poor.

  The present invention has been made in view of the above-mentioned conventional problems, and one of the objects thereof is to achieve strength while maintaining weight reduction, a simple structure, and a retaining wall block unit that can be manufactured at low cost, and To provide a retaining wall.

In order to solve the above problems, the present invention is directed to a front wall 12 made of concrete, and a rear wall 14 arranged so as to face the front wall 12 so as to leave a gap for pouring concrete between the front wall 12 and the front wall 12. And a connecting body 16 that includes a contact shoulder portion 36 that abuts on the inner surface side of each of the front wall 12 and the rear wall 14 and that is a rigid body that connects the front wall 12 and the rear wall 14. The front wall 12 and the rear wall 14 each include a substrate 44 that is a part of each of the wall 12 and the rear wall 14 that is embedded so as to be integrated with each other, and that protrudes in a direction facing the connecting body 16. While abutting shoulder portion 36 of connecting body 16 is brought into contact with the respective inner surface sides of and, the side surface of connecting body 16 is applied to substrate 44, and board 44 and abutting shoulder portion 36 of connecting body 16 are laterally penetratingly connected. The base plate 44b which is provided with the connecting means 18 and which is embedded in the rear wall 14 is made of an L-shaped metal plate, and the linear portion is projected toward the front wall side and the L-shaped bent portion is embedded. The wall 12 has a wall thickness smaller than that of the front wall 12, and a protruding portion 32 protruding outward from the outer surface of the rear wall 14 at a position corresponding to the embedded position of the substrate 44b. It is comprised from the block unit 10 for retaining walls containing . As the connecting body 16, many kinds having different lengths in the front-rear direction are prepared, and the connecting body having the length according to the construction conditions such as the height and strength of the retaining wall is connected to the front wall 12 and the rear wall 14. The retaining wall block unit 10 may be configured.

Further, the surface of the rear wall 14 facing the front wall 12 includes a large number of irregularities 34 formed by spraying and solidifying the coarse aggregate on the concrete placing surface at the time of forming the frame of the rear wall 14. It may be that.

  The connecting means 18 is in contact with the board 44, a hole 46 provided in the board 44, a through hole 48 provided in a direction penetrating the wall of the contact shoulder portion 36, and a hole 46 in the board 44. A fastening member 50 for laterally fastening the shoulder portion 36 in alignment with the through hole 48 is provided, and the front wall 12 or the rear wall 14 and the connecting body 16 can be attached and detached by access from the side surface side of the connecting body 16. It may be connected to.

  Further, the upper end portions of the front wall 12 and the rear wall 14 may be provided with an anchor member 54 for suspending support, a part of which is embedded to expose the upper portion.

Further, the connecting body 16 connects a pair of two horizontal frame portions 38 which are formed long in the front-rear direction and which are arranged parallel to each other, and the upper and lower horizontal frame portions 38 at a longitudinal intermediate position of the horizontal frame portions 38. It may be configured by a ladder-shaped frame body including one or a plurality of vertical frame portions 40 thus arranged.

  In addition, the connecting members 16 are arranged in pairs so that the front wall and the rear wall, which are arranged in parallel with each other with a space therebetween, are connected to each other in the left-right direction so as to connect in a rectangular frame shape. It is good also as having the brace material 52 which connects diagonally the fastening member 50 which connects 12 and one connection body 16, and the fastening member 50 which connects the rear wall 14 and another connection body 16. ..

  Further, according to the present invention, the retaining wall block unit 10 according to any one of claims 1 to 7 is stacked, and a concrete wall 68 is inserted between the front wall 12 and the rear wall 14 of the retaining wall block unit. It is composed of a retaining wall 60 constructed by casting.

  According to the block unit for a retaining wall of the present invention, a front wall made of concrete, and a rear wall arranged so as to face the front wall so as to leave a gap for placing the concrete between the front wall and the front wall, A front wall and a rear wall, each of which has an abutting shoulder portion that abuts on an inner surface side of the front wall; and a connecting body made of a rigid body that connects the front wall and the rear wall. A substrate integrated with a portion embedded therein, the substrate protruding in a direction opposite to the connecting body, and abutting shoulder portions of the connecting body on inner surface sides of the front wall and the rear wall, respectively. And a connection means for laterally connecting the substrate and the contact shoulder of the connector by applying the side surface of the connector to the substrate while abutting against each other, thereby reducing the weight while maintaining the required strength. In addition, the structure is simple and the manufacturing cost is low, and at the same time, the connecting work between the front wall and the rear wall and the connecting body can be performed easily and smoothly.

  Further, the connecting means includes the substrate, a hole provided in the substrate, a through hole provided in a direction penetrating the wall of the contact shoulder portion, a position of the hole of the substrate and the through hole of the contact shoulder portion. And a fastening member for lateral penetrating fastening, and the structure is simple and low in structure by detachably connecting the front wall or the rear wall and the connecting body by access from the side surface side of the connecting body. It can be manufactured at low cost, and at the same time, the connecting work between the front wall and the rear wall and the connecting body can be performed easily and smoothly.

  In addition, the substrate is formed of a metal angle plate partially embedded in the front wall or the rear wall, so that, for example, even when the front wall and the rear wall are made relatively thin to reduce the weight, A substrate that can maintain the fixing strength of the substrate can be specifically realized with a simple structure.

  In addition, by providing a structure in which upper end portions of the front wall and the rear wall are provided with a suspension anchor member having a part buried and an upper portion exposed, for example, a predetermined anchor such as a coupler is provided on the suspension anchor member. It can be easily suspended with a crane etc. by connecting the suspension support device of the above, and even if it is assembled by changing the length of the connecting body in the front-rear direction, even if the distance between the front wall and the rear wall changes, As a result of being able to stably suspend and support, the retaining wall block unit can be stably transported and stacked.

  Further, on the surface of the rear wall facing the front wall, a part of the large number of coarse aggregates used for forming the rear wall is exposed to the outside to form a large number of irregularities, thereby forming the rear wall. It improves the adhesion between the concrete and the concrete and improves the durability of the retaining wall as a whole.

  In addition, the connecting body is formed so as to connect the pair of horizontal frame portions that are long in the front-rear direction and are arranged in parallel in the vertical direction, and the upper and lower horizontal frame portions at the longitudinal intermediate position of the horizontal frame portions. By using a frame body composed of one or a plurality of vertical frame portions, the weight reduction can be realized while maintaining the strength of the connecting body, and the horizontal frame portion and the vertical frame portion can be combined. Since the concrete sloping from the gap flows in the left-right direction, concrete can be poured smoothly, and the retaining wall block units lined up in the left-right direction can be strongly connected to each other to improve the strength of the entire retaining wall.

  In addition, the connecting body is arranged such that two pairs are opposed to each other in the left-right direction so as to connect the front wall and the rear wall, which are arranged substantially parallel to each other with a space therebetween, in a rectangular frame shape. The fastening member connecting one connecting body and the fastening member connecting the rear wall and the other connecting body are diagonally connected to each other, so that they are arranged in a bracing shape. The strength of the retaining wall block unit can be improved by reinforcing the front wall, the rear wall, and the connecting body that are connected in a rectangular frame shape by the brace material.

  Furthermore, the present invention is constructed by stacking the retaining wall block units according to any one of claims 1 to 7 and placing a concrete wall between the front wall and the rear wall of the retaining wall block unit. Therefore, the construction work can be performed smoothly, the construction cost can be kept low, and a strong retaining wall can be realized.

It is a side view of 1st Embodiment of the block unit for retaining walls which concerns on this embodiment. It is an AA figure of the block unit for retaining walls of FIG. It is isometric view explanatory drawing seen from the front of the block unit for retaining walls of FIG. It is the perspective explanatory view seen from the rear surface of the block unit for retaining walls of FIG. FIG. 2 is an exploded side view of the retaining wall block unit of FIG. 1. It is a top view of the front wall of the block unit for retaining walls of FIG. It is a top view of the rear wall of the block unit for retaining walls of FIG. It is the exploded perspective view seen from the front of the block unit for retaining walls of FIG. It is the exploded perspective view seen from the rear of the block unit for retaining walls of FIG. It is explanatory drawing of the suspension-support anchor member periphery of the block unit for retaining walls of FIG. It is an action explanatory view at the time of suspending and supporting the block unit for retaining walls of FIG. It is explanatory drawing of the retaining wall constructed|assembled using the block unit for retaining walls of FIG. It is explanatory drawing of the example in which the length of the connecting material of the block unit for retaining walls of FIG. 1 differs.

  Embodiments of a retaining wall block unit and a retaining wall of the present invention will be described below with reference to the accompanying drawings. The block unit for a retaining wall according to the present invention is, for example, a concrete block for constructing a retaining wall, which is stacked vertically and is integrated by placing a barrel concrete between the front wall and the rear wall. It is to build a retaining wall. 1 to 11 show a first embodiment of a retaining wall block unit of an appliance according to the present invention. As shown in FIGS. 1, 2, 3, and 4, in this embodiment, the retaining wall block unit 10 connects the front wall 12, the rear wall 14, and the front wall 12 and the rear wall 14. And a connecting means 18 for connecting the front wall 12 and the connecting body 16 and the rear wall 14 and the connecting body 16.

The front wall 12 is a concrete surface block that serves as a decorative surface when the retaining wall is constructed. In this embodiment, as shown in FIG. 1, FIG. 2, FIG. 3, and FIG. 6, the front wall 12 is formed, for example, in a substantially rectangular shape in a front view and in a substantially π shape in a plan view. It is arranged in an inclined state corresponding to the inclination. Specifically, the front wall 12 has a rectangular plate-shaped or panel-shaped wall body 20 having a front surface 22 on which a flat surface or a pseudo-stone-like decorative surface is formed, and a rear surface side thereof having a vertically long angle. Two columnar leg portions 24 are provided so as to project rearward with a space therebetween. The leg portion 24 of the front wall 12 is provided at a position displaced upward from the wall body portion 20. The front wall 12 has a convex portion 26 projecting upward from the upper end side of the wall main body portion 20 and the lower end side of the wall main body portion 20 when the retaining wall blocks are stacked. A concave portion 28 that fits into the convex portion 26 is provided.

  The rear wall 14 is a back panel that is arranged so as to face the front wall 12 so as to leave a space for pouring concrete from the front wall 12. In this embodiment, as shown in FIG. 1, FIG. 2, FIG. 4, and FIG. 7, the rear wall 14 is made of concrete, for example, and has a substantially rectangular shape in a front view and a substantially π-shape with a short leg in a plan view. The front wall 12 and the front wall 12 are inclined in a substantially parallel shape. The rear wall 14 is provided with a projecting portion 32 that projects toward the rear surface side of the wall main body 30 having a rectangular plate shape or a panel shape having substantially the same size as the wall main body 20 of the front wall 12. The protruding portion 32 is provided so as to correspond to a mounting position of the substrate 44b of the connecting means 18, which will be described later, and to increase the thickness of the wall main body portion 30 only at the mounting position portion to secure a fixing depth of the substrate 44b. And four are spaced apart from each other. For example, the upper two protrusions 32 have their upper ends set at the same height as the upper ends of the wall body 30, and the lower two protrusions 32 have their lower ends at the same height as the lower ends of the wall body 30. It is set to the position, and each is provided in the shape of a flat prism. Further, on the front surface of the rear wall 14 facing the front wall 12, a large number of irregularities 34 are formed by exposing a part of the large number of coarse aggregates used at the time of molding the rear wall 14 to the outside. Thereby, when the encased concrete is cast between the front wall 12 and the rear wall 14, the adhesion between the rear wall 14 and the encased concrete is improved, and the yield strength of the entire retaining wall can be improved. In addition, the unevenness of the rear wall 14 is, for example, when the rear wall is formed by a formwork, after the ironing surface of the concrete is leveled, a small amount of coarse aggregate is sprayed before the concrete is completely solidified. It is good to form. In addition, the unevenness 34 on the front surface side of the rear wall 14 is formed so as to avoid a portion where the connecting body 16 abuts, and a portion where the connecting body 16 abuts is a flat surface.

  The connecting body 16 is a connecting member that includes a contact shoulder portion 36 that abuts on the inner surface sides of the front wall 12 and the rear wall 14 and that is a rigid body that connects the front wall 12 and the rear wall 14. In the present embodiment, the connecting body 16 is made of, for example, reinforced concrete in which a plurality of reinforcing bars are arranged. As shown in FIG. 2, for example, the connecting body 16 is configured to come into contact with and be connected to the rear surface side of the leg portion 24 projecting rearward of the front wall 12, and to be substantially parallel to each other at intervals. Two pairs are arranged facing each other in the left-right direction so as to connect the arranged front wall 12 and rear wall 14 in a rectangular frame shape. As shown in FIG. 1, FIG. 3, and FIG. 4, for example, the connecting body 16 includes a pair of horizontal frame portions 38 that are long in the front-rear direction and are arranged in parallel in the vertical direction. It is composed of a ladder-shaped frame body composed of one or a plurality of vertical frame portions 40 arranged so as to connect the upper and lower horizontal frame portions 38 at the longitudinal middle position. The horizontal frame portion 38 and the vertical frame portion 40 are formed, for example, in a rectangular column shape, and are integrally molded by pouring concrete into the mold with the reinforcing bars arranged in the core. The lateral frame portions 38 are formed with abutting shoulder portions 36 that abut on the rear surface side of the leg portions 24 of the front wall 12 at their front end portions, and abut on the front surface side of the rear wall 14 at their rear end portions. An abutment shoulder 36 is formed. The horizontal frame portion 36 is arranged such that the horizontal frame portion arranged on the upper side is displaced rearward from the horizontal frame portion arranged on the lower side, and the abutting shoulder portions 34 of the horizontal frame portion 36 are the leg portions 24 of the front wall 12. An inclined end surface 42 is formed so as to correspond to the inclination of the rear wall 14. As shown in FIGS. 1 and 13A and 13B, the length of the connecting body 16 in the front-rear direction is set according to the distance between the front wall 12 and the rear wall 14. The connection body 16 including a ladder-shaped frame body may be configured such that the number of vertical frame portions is increased or decreased and the interval between the vertical frame portions is adjusted according to the length of the horizontal frame portion 38 in the front-rear direction.

  As shown in FIG. 1, FIG. 2, FIG. 3, and FIG. 4, the connecting means 18 is integrated by embedding a part of each of the front wall 12 and the rear wall 14 and also from the front wall 12 and the rear wall 14. Each of the substrates 44 includes a substrate 44 projecting in a direction opposite to the connecting body 16, and the abutting shoulder portions 36 of the connecting body 16 are in contact with the inner surface sides of the front wall 12 and the rear wall 14, respectively. Then, the side surface (inclined end surface 42 in this embodiment) of the connecting body 16 is applied to laterally connect the substrate 44 and the contact shoulder portion 36 of the connecting body 16. In the present embodiment, as shown in FIGS. 8 and 9, the connecting means 18 is provided, for example, in a direction that penetrates the substrate 44, the hole 46 provided in the substrate 44, and the wall of the contact shoulder portion 36. Through the through hole 48 and the fastening member 50 that laterally fastens the hole 46 of the base plate and the through hole 48 of the contact shoulder portion 36 in position. The front wall 12 or the rear wall 14 and the connecting body 16 are detachably connected.

  As shown in FIG. 6, the base plate 44 a of the front wall 12 is a metal flat plate partially embedded in the leg portion 24 of the front wall 12 and projecting in a direction facing the connecting body 16, that is, rearward. It may be that. In the present embodiment, four substrates 44 are fixed in a vertically standing state such that the plate surfaces thereof are oriented in the left-right direction, and holes 46 penetrating in the lateral direction at portions projecting outside the substrate 44. Is perforated. As shown in FIG. 7, the substrate 44 b of the rear wall 14 is made of a metal angle plate partially embedded in the rear wall 14. The L-shaped bent portion of the board 44b is embedded in and fixed to the rear wall 14, and the straight portion of the board 44b is provided so as to project toward the facing direction of the connecting body 16, that is, the front side. Corresponding to the position of the substrate 44a of the front wall 12, four substrates 44b are fixed in a vertically standing state so that the plate surfaces thereof are oriented in the left-right direction, and are fixed to the portion projecting outside the substrate 44b. A hole 46 penetrating in the lateral direction is formed. By providing the substrate 44b in the L shape, the fixing strength of the substrate 44b can be secured even if the rear wall 14 is formed to have a relatively thin thickness for weight reduction. Further, as described above, the rear wall 14 in which the substrate 44b is embedded is provided with the projecting portion 32 so as to increase the thickness of the wall main body portion 30, so that the fixing depth of the substrate is secured, The strength can be maintained by more firmly fixing the substrate 44b to the rear wall. The through hole 48 of the connecting body 16 is provided in the lateral direction at the front end side and the rear end side where the contact shoulders 36 of the upper and lower horizontal frame portions 38 are formed. The fastening member 50 is, for example, a bolt/nut, and the holes 46 of the board and the through hole 48 of the contact shoulder portion 36 are aligned with each other, and the fastening member of the bolt/nut is screwed and connected. .. Since these fastening operations can be performed from the side surface side, the operations can be performed smoothly and in a short time.

  As shown in FIGS. 1 and 2, in the present embodiment, a fastening member 50 that connects the front wall 12 and one connecting body 16 and a fastening member that connects the rear wall 14 and another connecting body 16 to each other. A brace member 52 that obliquely connects 50 and 50 is provided. The brace material 52 is made of, for example, a metal rod material such as a linearly long reinforcing bar and is provided so as to obliquely intersect each other in an X shape, and reinforces the rectangular frame-shaped retaining wall block unit. The brace members 52 are fixed, for example, by welding their ends to the bolts or nuts of the connecting member 50.

  As shown in FIGS. 10 and 11, a suspension anchor member 54, which is partially embedded and whose upper portion is exposed, is provided at the upper ends of the front wall 12 and the rear wall 14. The suspension anchor member 54 is a member for suspending the front wall 12 and the rear wall 14 for suspending the retaining wall block unit 10. The suspension anchor member 54 is, for example, made of a dumbbell-shaped metal fitting having a columnar shape and having enlarged portions at the upper and lower ends, and is provided inside a hemispherical recess 56 formed in the upper ends of the front wall 12 and the rear wall 14. It is installed in a storage state, and the upper half is exposed in the hemispherical recess 56 and the lower half is embedded in the wall main body and fixed integrally. For example, the suspension anchor member 54 on the front wall 12 side is provided on the leg portion 24. The suspension anchor member 54 on the rear wall 14 side is provided at a position so as to straddle the wall main body portion and the protruding portion 34. When suspending the retaining wall block unit 10, there is an engagement groove 57a that is detachably engaged with the head portion of the front wall 12 and the rear wall 14 with the diameter of the suspension anchor member 54 enlarged. The coupler 57 is set, and the front and rear are simultaneously lifted by a suspension support device, a crane, or the like via a wire 60 linked to the coupler 57 via a shackle 59 or the like.

Next, a retaining wall 60 constructed using the retaining wall block unit 10 according to the present embodiment will be described with reference to FIG. 12 as well. For example, the front wall 12, the rear wall 14, and the connecting body 16 are each manufactured in advance using a formwork in a factory or the like , and in the assembled state, a retaining wall for the ground G such as an inclined ground or embankment is constructed. Transport to the site. The retaining wall block unit 10 lays a crushed foundation stone 62 that serves as a foundation of a place where a retaining wall is installed, and lays foundation concrete 64 thereon. A precast base block may be installed. The bottommost retaining wall block units 10 are arranged on the basic concrete 64 while closely adhering to each other in the left-right direction, and the retaining wall block units 10 are sequentially stacked in the vertical direction. In the process of stacking the retaining wall block units 10, as shown in FIG. 11, the coupler 57 is attached to the suspension supporting anchor member 54, and is lifted by a crane or the like via the wire 60 or the like to retain the lower retaining wall. The block unit 10 is aligned and suspended, and the coupler is removed. Further, a backfill material 66 is filled between the rear wall 14 and the ground G on which the slope is formed, and a barrel concrete 68 is placed between the front wall 12 and the rear wall 14 so as to move in the left-right direction and the vertical direction. The retaining wall block units arranged in the direction are integrated. Since the connecting body 16 is formed of a ladder-shaped frame when the body-filling concrete 68 is placed, the connection can be made smoothly, and the front wall 12 and the rear wall 14 are pressed by the pressure during concrete placement. In addition to being able to favorably prevent deformation in the front-rear direction, when concrete is solidified, the strength of the connection between the retaining wall block units arranged in the lateral direction can be improved, and the strength of the entire retaining wall can be improved. In this way, a plurality of retaining wall block units are stacked up to a predetermined height, and the top end concrete 70 is cast on the upper surface side of the uppermost retaining wall block unit 10 to construct the retaining wall 60.

  The joint device for a brace of the present invention described above is not limited to the configurations of the above-described embodiments only, and may be modified in any manner without departing from the essence of the present invention described in the claims. Good.

  The block unit for a retaining wall and the retaining wall of the present invention are suitably used when constructing a retaining wall of various sizes.

DESCRIPTION OF SYMBOLS 10 Block unit for retaining wall 12 Front wall 14 Rear wall 16 Connection body 18 Connection means 36 Abutment shoulder part 38 Horizontal frame part 40 Vertical frame part 44 Substrate 46 hole 48 Through hole 50 Fastening member 52 Brace material 54 Suspension anchor member 60 Retaining wall

Claims (7)

A concrete front wall,
A rear wall made of concrete, which is arranged so as to face the front wall so as to leave a gap for placing concrete in the front wall,
A front wall and a rear wall are provided with abutting shoulder portions that abut on respective inner surface sides, and a connecting body made of a rigid body that connects the front wall and the rear wall is provided,
Substrates that are integrally embedded by embedding a part of each of the front wall and the rear wall, and include substrates that project in a direction facing the connecting body, and inner surfaces of the front wall and the rear wall, respectively. Connection means for laterally penetrating the substrate and the contact shoulder of the connector by applying the side surface of the connector to the substrate while abutting the contact shoulder of the connector on the side .
The substrate to be embedded in the rear wall is made of an L-shaped metal plate, the linear portion is projected toward the front wall side, and the L-shaped bent portion is embedded.
The rear wall has a wall thickness smaller than that of the front wall, and includes a protrusion protruding outward from the outer surface of the rear wall at a position corresponding to the embedding position of the substrate. Characteristic block unit for retaining wall. The surface of the rear wall facing the front wall includes a large number of concavities and convexities formed by spraying and solidifying coarse aggregate on the concrete placing surface during mold formation of the rear wall. Item 1. A retaining wall block unit according to Item 1. The connecting means is
The substrate;
Holes provided in the substrate,
A through hole provided in the direction of penetrating the wall of the contact shoulder,
A fastening member for laterally fastening by aligning the position of the hole of the substrate and the through hole of the contact shoulder portion,
The retaining wall block unit according to claim 1 or 2, wherein the front wall or the rear wall and the connecting body are detachably connected to each other by access from a side surface side of the connecting body.   The retaining wall block according to any one of claims 1 to 3, wherein an anchor member for suspending a suspension is provided at the upper end portions of the front wall and the rear wall, a part of which is buried to expose the upper portion. unit. The connecting body is formed so as to connect the pair of horizontal frame portions that are long in the front-rear direction and are arranged in parallel vertically and the upper and lower horizontal frame portions at the longitudinal intermediate position of the horizontal frame portions. one or more and the vertical frame portion, retaining wall block unit according to any one of claims 1 to 4, characterized in that it consists of ladder-like frame body made of. The connecting body is arranged such that two pairs are opposed to each other in the left-right direction so as to connect the front wall and the rear wall, which are arranged substantially parallel to each other with a space therebetween, in a rectangular frame shape,
A bracing member that obliquely connects a fastening member that connects the front wall and one connecting body and a fastening member that connects the rear wall and another connecting body to each other. The block unit for retaining wall according to any one of 5 . A retaining wall constructed by stacking the retaining wall block units according to any one of claims 1 to 6 and placing a concrete wall between the front wall and the rear wall of the retaining wall block unit.

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