JP2017053149A - Block for retaining wall - Google Patents

Abstract

PROBLEM TO BE SOLVED: To construct a highly reliable retaining wall with sufficient strength, while facilitating transport and handling of a large and heavy concrete block for the retaining wall.SOLUTION: A block for a retaining wall comprises a front surface side block 110 having a front surface wall 111, intermediate connection blocks 130, 130, and a rear surface side block 120 having a rear surface wall 121. An engaging recess 113 is provided on front surface side connection leg parts 112a, 112b of the front surface side block 110, the engaging recess being relatively engaged with an engaging protrusion 131 formed on the intermediate connection blocks 130, 130. An engaging protrusion 123 is provided on rear surface side connection leg parts 122a, 122b of the rear surface side block 120, the engaging protrusion being relatively engaged with an engaging recess 134 formed on the intermediate connection blocks 130, 130. The blocks are assembled by relatively engaging the engaging protrusion with the engaging recess, and integrated to form a block 100 for a retaining wall by connecting and fixing connection parts 140 to 147 formed between the blocks with a connector 153.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a retaining wall block that is piled up on a slope in a road, a railway, a river, a residential land development site, and the like to construct a retaining wall.

  For example, on a slope such as a road, it is widely practiced to build up a retaining wall by stacking retaining wall blocks as a retaining wall for preventing the slope from collapsing.

  As this type of retaining wall block, a concrete block integrally formed is widely used. In this type of concrete retaining wall block, in the case of a large-sized block, the size of the left and right is 1.5 to 3.0 m, the height is 0.5 to 1.5 m, and the depth is Some have a thickness of 2.0 to 2.5 m, and the weight may be about 1.5 to 3.0 tons. Transportation of such a large retaining wall block requires a transportation means such as a large truck, and a large heavy machine is also required for the construction of the retaining wall.

  In addition, in the case of a large integrated retaining wall block, not only the mold for molding becomes large and difficult to manufacture, but also the manufacturing cost increases due to the increase in size of the mold.

  However, in construction on a narrow road or a place where a large space cannot be taken, a large heavy machine or construction machine may not be able to cope. In this case, it may be necessary to deal with a small heavy machine or sometimes manually.

  On the other hand, when the retaining wall block is small, the number of blocks used on the slope is larger than that of a large block, so that workability is lowered. In addition, when the height of the retaining wall is increased, a considerably large load is applied to the lower block, so that the strength of the small block may be insufficient.

  In order to solve such problems, the whole type is divided into multiple blocks while maintaining the size of the front wall and back wall of the retaining wall block, and is used in combination when the retaining wall is constructed. A wall block is proposed in Patent Document 1 and Patent Document 2.

  The retaining wall block proposed in Patent Document 1 has a configuration in which the divided front block, intermediate block, and rear block are combined and integrated, and therefore, transportation and installation of each block are facilitated. Furthermore, the retaining wall block of Patent Document 1 can be formed with a desired depth in the retaining wall by appropriately changing the number and size of the intermediate blocks.

  Moreover, since the retaining wall block proposed in Patent Document 2 is also configured to combine and integrate the divided front wall, connecting portion, and rear wall, It is easy to transport and install the block. Furthermore, the retaining wall block of Patent Document 2 can construct the retaining wall with an optimum dimension according to the construction site by appropriately changing the length of the connecting portion.

Japanese Patent Laid-Open No. 10-102517 However, since the retaining wall block of Japanese Patent Laid-Open No. 2014-134080 performs the connection of each block only by tightening the bolt and the nut, the entire load of the retaining wall block is coupled by the bolt and the nut. It will be supported only by the part, and it will be difficult to stably support each heavy block, which may cause positional displacement at the time of transfer or construction, and it may be difficult to construct a stable retaining wall.

  In addition, since the retaining wall block of Patent Document 2 is connected to the front wall and the rear wall of the connecting portion that connects the divided front wall and rear wall only by welding a metal plate, Patent Document 2 As in the case of 1 retaining wall block, the entire load of each block is supported only by the metal plate, making it difficult to stably support each heavy block. This may cause difficulty in the construction of a stable retaining wall.

  An object of the present invention is proposed for the purpose of solving the problems of the above-described conventional technology, and facilitates handling such as transportation of a large retaining wall block. And it is providing the block for retaining walls which maintains sufficient intensity | strength and enables construction of a highly reliable retaining wall.

  Another object of the present invention is to provide a retaining wall block that is easy to manufacture and can be manufactured at low cost while increasing the size.

  Furthermore, the subject of this invention is providing the block for retaining walls which can change a magnitude | size freely according to an installation place.

  In order to achieve the above-described problems, the present invention has a rectangular front wall integrally formed, and a pair of front side connecting legs are formed integrally in parallel on the back side of the front wall. A concrete front side block and a rectangular rear wall are integrally formed, and a pair of back side connecting legs are integrally formed in parallel on the front side of the back wall. And a split type retaining wall block comprising a pair of concrete intermediate connection blocks interposed between the pair of front side connection legs and the pair of back side connection legs.

  There is a relative engaging relationship between a contact surface that contacts the intermediate connection block of the front side connection leg provided on the front block and a contact surface of the intermediate connection block that contacts the contact surface. A mating convex portion and an engaging concave portion are provided, and the engaging convex portion and the engaging concave portion are combined by abutting and abutting each other on the abutting surfaces of the front side connecting leg portion and the intermediate connecting block. Then, it is formed at a height and depth at which a gap is formed between the front end portion of the engaging convex portion and the engaging concave portion.

  The relative engagement between the abutment surface of the backside connection leg provided on the backside block and the abutment surface of the intermediate connection block with which the abutment surface abuts. A mating convex part and an engaging concave part are provided, and the engaging convex part and the engaging concave part are combined by bringing the abutting surfaces into contact with and contacting the back side connecting leg part and the intermediate connecting block. Then, it is formed at a height and depth at which a gap is formed between the front end portion of the engaging convex portion and the engaging concave portion.

  Between the front block and the intermediate connection block, the front block and the intermediate connection block abut the contact surface of the front connection leg and the contact surface of the intermediate connection block. When the two are combined, a connecting portion for connecting the front block and the intermediate connecting block is provided, and between the back block and the intermediate connecting block, the back block and the intermediate connecting block are provided. A connecting portion for connecting the back side block and the intermediate connecting block when the abutting surface of the back side connecting leg and the abutting surface of the intermediate connecting block are combined. Yes.

  The front side block, the intermediate connecting block, and the back side block are engaged with each other by engaging and engaging the engaging convex portions and engaging concave portions provided between the blocks. In addition to being combined, the connecting portions provided between the blocks are connected and integrated by a connecting tool.

  Further, in the present invention, the connecting portion that connects the blocks is arranged so as to cover the contact surface side of the opening recess formed in the opposing surface of the blocks when the blocks are combined. Each of the blocks can be integrated by connecting and fixing the opposing connection plates with a connector.

  In the present invention, when the engaging convex portion and the engaging concave portion are engaged between the engaging convex portion and the engaging concave portion, the engaging convex portion and the engaging concave portion are An engagement guide surface for guiding the engagement direction may be provided.

  Further, in the present invention, a plurality of intermediate connection blocks having different widths in a direction in which the front side block and the rear side block are connected are selected, and one selected from the plurality of intermediate connection blocks having different widths. An intermediate connecting block having a width is interposed between the front side block and the back side block, and the front side block and the back side block are integrally connected to each other, thereby connecting the front side block to the back side. The length in the direction across the side block can be made variable.

  Further, in the present invention, a plurality of a pair of the intermediate connection blocks connected between the front side block and the back side block are continuously provided in a direction from the front side block to the back side block, thereby The length in the direction from the side block to the back side block can be appropriately changed.

  In the present invention, as the pair of intermediate connection blocks, one intermediate connection block that is connected to each other and integrally formed can be used.

  Since the present invention is divided into three types of blocks, a front side block, an intermediate connection block, and a back side block, the large retaining wall block can be reduced in size and weight. Not only will it be easy, but it will also be possible to carry out retaining walls with small heavy machinery and manpower.

  In the present invention, the front side block, the intermediate connection block, and the back side block, which are integrally formed of concrete, are combined and integrated as a concrete structure, so that the load of each block is supported by the concrete block itself. And the load strength of the integrated retaining wall block can be sufficiently maintained.

  In particular, according to the present invention, the engagement convex portions and the engagement concave portions provided between the blocks are relatively engaged with each other to combine the blocks, and the connection portions provided between the blocks are connected by a connector. Therefore, when lifting and moving the retaining wall blocks that are combined together, the load of each block is received between the blocks, while the connecting tool prevents the position shift between the blocks. Since it is possible to reliably maintain the converted state and to move and carry to the construction site, the construction accuracy of the retaining wall can be increased and construction can be performed.

  In the present invention, since the connecting plate constituting the connecting portion is disposed so as not to protrude from the contact surface of each block, the contact surfaces between the blocks can be connected in close contact with each other. The connection state of the blocks is further stabilized, and after the connection, the bottom surface of each block can be installed horizontally with respect to the ground.

  In the present invention, since the engagement guide surface is provided in either one of the engagement convex portion and the engagement concave portion provided in each block, which are engaged with each other, the combination operation of the blocks becomes easy.

  Further, in the present invention, since the front end side of the engaging convex portion is narrow and the opening side of the engaging concave portion is wide and the engaging guide surface inclined to the engaging convex portion and the engaging concave portion is formed. The relative engagement work between the engagement convex portion and the engagement concave portion can be easily performed.

  According to the present invention, since the intermediate connecting block having the optimum width in the direction between the front block and the back block can be selected, the width of the retaining wall block can be changed according to the earth pressure on the slope.

  Since the present invention can freely change the number of intermediate connection blocks installed between the front block and the back block, the earth pressure on the slope can be increased or decreased by increasing or decreasing the number of intermediate connection blocks to be connected. Accordingly, the retaining wall block having the optimum dimensions can be formed.

  In the present invention, since a pair of intermediate connection blocks formed integrally can be used as the intermediate connection block, the load strength of the retaining wall block can be increased.

It is a perspective view which shows one Embodiment of the block for retaining walls which concerns on this invention. It is a disassembled perspective view of the block for retaining walls shown in FIG. It is a decomposition | disassembly side view of the block for retaining walls shown in FIG. It is a perspective view of the front side block of the block for retaining walls shown in FIG. It is a perspective view of the intermediate | middle connection block of the block for retaining walls shown in FIG. It is a perspective view of the intermediate | middle connection block of the block for retaining walls shown in FIG. It is a side view which shows the detail of the connection part of a front side block and an intermediate | middle connection block. It is a side view which shows the inclination-angle of the engagement guide surface of a front side block. It is a side view which shows the inclination angle of the engagement guide surface of an intermediate | middle connection block. It is a side view which shows the detail of the connection part of an intermediate | middle connection block and a back side block. It is a side view which shows the inclination-angle of the engagement guide surface of a back side block. It is a side view which shows the installation position at the time of connecting a front side block and an intermediate | middle connection block. It is a side view which shows the state which connected the front side block and the intermediate | middle connection block with the connection tool. It is a side view which shows the installation position at the time of connecting an intermediate | middle connection block and a back side block. It is a side view which shows the state which connected the intermediate | middle connection block and the back side block with the connection tool. It is a side view which shows an example of the retaining wall formed using the block for retaining walls which concerns on this invention. It is the side view which showed the other example of the intermediate | middle connection block of the block for retaining walls which concerns on this invention. It is the side view which showed the other example of the block for retaining walls which concerns on this invention. It is the side view which showed the other example of the block for retaining walls which concerns on this invention. It is the perspective view which showed the other example of the intermediate | middle connection block of the block for retaining walls which concerns on this invention. It is the perspective view which showed the other example of the connection part of the back side block of the block for retaining walls which concerns on this invention.

  Hereinafter, an embodiment of a retaining wall block according to the present invention will be described with reference to the drawings.

  As shown in FIGS. 1, 2, and 3, the retaining wall block 100 according to the present embodiment includes a front side block 110, a back side block 120, the front side block 110, and the back side block 120. A pair of intermediate connection blocks 130, 130 are provided between the front side block 110 and the back side block 120.

  The front-side block 110, the back-side block 120, and the intermediate connection blocks 130 and 130 that constitute the retaining wall block 100 are each integrally formed by molding a concrete material using a molding mold.

  As shown in FIGS. 2, 3, and 4, the front block 110 includes a rectangular front wall 111, and a pair of front connection legs 112a and 112b are parallel to each other on the rear side. It is continuously formed in the height direction of 111. On the other hand, as shown in FIGS. 2 and 3, the back block 120 includes a rectangular back wall 121, and a pair of back connecting legs 122 a and 122 b are parallel to each other on the front side of the back wall 121. It is formed continuously in a series in the height direction.

  In addition, reinforcing materials such as reinforcing bars may be embedded in the front wall 111 and the back wall 121 as necessary in order to increase the load strength.

  As shown in FIGS. 1, 2, and 3, the pair of intermediate connection blocks 130, 130 are provided between the pair of front side connection legs 112a, 112b and the pair of back side connection legs 122a, 122b. The front side block 110 and the back side block 120 are connected to each other.

  As shown in FIGS. 3 and 4, the front end surfaces of the pair of front side connection legs 112 a and 112 b formed on the front side block 110 are respectively in contact with the front side block contact surfaces 133 of the intermediate connection blocks 130 and 130. The intermediate connection block contact surface 115 is in contact. An engagement recess 113 that engages with an engagement protrusion 131 formed on the front block contact surface 133 of the intermediate connection blocks 130 and 130 is formed on the front end surfaces of the front connection legs 112a and 112b. Is formed.

  An engagement guide surface 114 that guides the engagement direction of the engagement protrusion 131 when the engagement protrusion 131 engages is formed in the engagement recess 113. As shown in FIG. 7, the engagement guide surface 114 is configured as an inclined surface that is inclined with respect to the horizontal surface on the lower side that becomes the ground contact surface when the front side block 110 and the intermediate connection block 130 are combined.

  Here, as shown in FIGS. 5 and 6, the engaging protrusions 131 formed in the intermediate connection blocks 130 and 130 are positioned on the lower side in the drawing so that the width in the height direction gradually decreases. The surface is formed to be inclined from the base side toward the tip side. When the front side block 110 and the intermediate connecting blocks 130 and 130 of the engagement convex part 131 are combined and installed, the surface inclined to the horizontal plane located on the lower side is an engagement guide when engaging with the engagement concave part 113. The surface 132 is used.

  Then, as shown in FIG. 7, the engagement recess 113 formed in the front side block 110 is formed to have a depth A2 larger than the protrusion height A1 of the engagement protrusion 131, and It is formed to have an opening width B2 that is larger than the width B1 on the front end side.

  Thus, since the front end side width B1 of the engaging convex portion 131 is smaller than the opening width B2 of the engaging concave portion 113, when the front side block 110 and the intermediate connecting block 130 are combined, the engaging convex portion 131 is used. And the engagement recess 113 can be easily engaged with each other. Further, since the engaging recess 113 is formed with a depth A2 larger than the projection height A1 of the engaging protrusion 131, the front side connecting leg portion is combined with the front side block 110 and the intermediate connecting block 130. Since the intermediate connection block contact surface 115 of 112a and 112b and the front block contact surface 133 of the intermediate connection blocks 130 and 130 can be reliably contacted, accurate positioning can be achieved and stable combination can be performed. it can.

  Here, as shown in FIG. 8, the engagement guide surface 114 provided in the engagement recess 113 has an inclination angle θ1 of the engagement guide surface 114 with respect to a reference line Q1 perpendicular to the intermediate connection block contact surface 115. It is preferable to form so that it may be 30 degrees-about 45 degrees. Then, as shown in FIG. 9, the engagement guide surface 132 of the engagement convex portion 131 may be formed with an inclination angle θ2 that is substantially the same as the inclination angle θ1 of the engagement guide surface 114 provided in the engagement recess 113. desirable. That is, the engagement guide surface 132 formed on the engagement convex portion 131 side has an inclination angle θ2 of the engagement guide surface 132 with respect to the line Q2 perpendicular to the front block contact surface 133 is approximately 30 ° to 45 °. It is preferable that it is formed as such.

  Thus, since the engagement guide surfaces 114 and 132 for guiding the direction in which the engagement recess 113 and the engagement protrusion 131 are relatively engaged are provided, a smooth engagement operation can be performed. Further, by setting the inclination angles θ1 and θ2 of the engagement guide surfaces 114 and 132 to about 30 ° to about 45 °, the engagement state of the engagement concave portion 113 and the engagement convex portion 131 that are engaged with each other is released. It is possible to prevent and maintain a stable engagement state. Furthermore, by making the inclination angles θ1 and θ2 of the engagement guide surfaces 114 and 132 coincide with each other, when the engagement recess 113 and the engagement projection 131 are relatively engaged, the engagement guide surfaces 114 and 132 that are relatively slidably contacted with each other are used. The load of the front side block 110 and the intermediate | middle connection block 130 can be received, and the stable strong combination state can be obtained.

  The engagement guide surfaces 114 and 132 for guiding the engagement direction between the engagement recess 113 and the engagement projection 131 are provided only on either the engagement recess 113 or the engagement projection 131. Alternatively, one surface may be a surface parallel to the reference lines Q1 and Q2 perpendicular to the contact surface. Even with such a configuration, it is possible to guide the engagement recess 113 and the engagement protrusion 131 in the relative engagement direction.

  And the front end surface of each back side connection leg part 122a, 122b formed in the back side block 120 is the back side block contact surface formed in the intermediate connection blocks 130, 130 as shown in FIGS. The intermediate connection block contact surface 125 is in contact with each other. Engagement protrusions 123 that are engaged with the engagement recesses 134 formed in the intermediate connection blocks 130 and 130 are formed on the front end surfaces of the rear side connection legs 122a and 122b.

  Similar to the engagement protrusion 131 formed on the intermediate connection block 130, the engagement protrusion 123 formed on the pair of back side connection legs 122a and 122b has a height as shown in FIGS. In order to gradually reduce the width in the direction, the surface located on the lower side in the figure is formed to be inclined from the base side toward the tip side. When the rear side block 120 and the intermediate connection blocks 130 and 130 of the engagement convex portion 123 are combined and installed, the surface inclined to the horizontal plane located on the lower side is an engagement guide when engaging with the engagement concave portion 134. The surface 124 is used.

  Then, as shown in FIG. 10, the engagement recesses 134 formed in the intermediate connection blocks 130 and 130 are formed to have a depth A4 larger than the protrusion height A3 of the engagement projections 123, and the engagement projections It is formed so as to have an opening width B4 larger than the width B3 on the front end side of 123.

  Thus, since the width B3 on the front end side of the engaging convex portion 123 is formed smaller than the opening width B4 of the engaging concave portion 134, when the rear side block 120 and the intermediate connecting blocks 130, 130 are combined, the engaging convex portion Relative engagement between the portion 123 and the engagement recess 134 can be easily performed. Further, since the engagement recess 134 is formed with a depth A4 larger than the protrusion height A3 of the engagement protrusion 123, when the back block 120 and the intermediate connection blocks 130 and 130 are combined, the back connection Since the intermediate connection block contact surface 125 of the legs 122a and 122b and the back side block contact surfaces 136 and 136 of the intermediate connection blocks 130 and 130 can be reliably contacted, accurate positioning is achieved and a stable combination is achieved. It can be performed.

  Here, as shown in FIG. 9, the engagement guide surface 135 formed in the engagement recess 134 of the intermediate coupling block 130, 130 has an inclination angle θ3 with respect to the reference line Q3 perpendicular to the back-side block contact surface 136. It is preferably formed so as to be approximately 30 ° to 45 °. As shown in FIG. 11, the engagement guide surface 124 of the engagement convex portion 123 that is relatively engaged with the engagement concave portion 134 has an inclination angle θ3 of the engagement concave portion 134 formed in the intermediate connection blocks 130 and 130. It is desirable to form with substantially the same inclination angle θ4. That is, the engagement guide surface 124 formed on the engagement convex portion 123 side has an inclination angle θ4 of the engagement guide surface 124 with respect to the reference line Q4 perpendicular to the intermediate connection block contact surface 125 of approximately 30 ° to 45 °. It is preferable that it is formed as such.

  Thus, since the engagement guide surfaces 135 and 124 for guiding the direction in which the engagement concave portion 134 and the engagement convex portion 123 are relatively engaged are provided, a smooth engagement operation can be performed. Further, by setting the inclination angles θ3 and θ4 of the engagement guide surfaces 135 and 124 to about 30 ° to about 45 °, the engagement state of the engagement convex portion 123 and the engagement concave portion 134 that are relatively engaged with each other is easily released. This can be prevented and a stable engagement state can be maintained. Further, by making the inclination angles θ3 and θ4 of the engagement guide surfaces 135 and 124 coincide with each other, when the engagement recess 134 and the engagement projection 123 are relatively engaged, the engagement guide surfaces 135 and 124 that are relatively slidably brought into contact with each other are used. The load of the back block 120 and the intermediate | middle connection block 130 can be received, and the stable strong combination state can be obtained.

  The engagement guide surfaces 135 and 124 for guiding the engagement direction between the engagement recess 134 and the engagement protrusion 123 are provided only on either the engagement recess 134 or the engagement protrusion 123. Alternatively, one surface may be a surface parallel to the reference lines Q3 and Q4 perpendicular to the contact surfaces 136 and 125. Even with such a configuration, it is possible to guide the engagement concave portion 134 and the engagement convex portion 123 in the relative engagement direction.

  As shown in FIG. 4, the front side block 110 and the intermediate connection blocks 130 and 130 are connected to each other on the intermediate connection block contact surface 115 of the front side connection legs 112a and 112b formed on the front side block 110. Connecting portions 140 and 141 are provided. The connecting portions 140 and 141 provided on the front side connecting leg portions 112a and 112b are provided so as to be positioned above and below the front side connecting leg portions 112a and 112b with the engaging recess 113 interposed therebetween.

  Further, as shown in FIG. 5, the front side block contact surface 133 of the intermediate connection blocks 130 and 130 that contact the intermediate connection block contact surface 115 of the front side block 110 is connected to the connection portion provided on the front side block 110. Connection portions 142 and 143 connected to 140 and 141, respectively, are provided. These connecting portions 142 and 143 are provided so as to be positioned above and below the intermediate connecting block 130 with the engaging convex portion 131 protruding from the front block contact surface 133 interposed therebetween.

  As shown in FIG. 6, connecting portions 144 and 145 for connecting the intermediate connecting block 130 and the back side block 120 to each other are provided on the back side block contact surface 136 of the intermediate connecting block 130. These connecting portions 144, 145 are provided so as to be positioned above and below the intermediate connecting block 130 with an engagement recess 134 formed in the back side block contact surface 136 interposed therebetween.

  Further, as shown in FIGS. 2 and 3, a connecting portion 144 provided in the intermediate connecting blocks 130 and 130 is provided on the intermediate connecting block contact surface 125 of the back side connecting legs 122 a and 122 b formed in the back block 120. , 145 and connection portions 146, 147, respectively, are provided. These connecting portions 146 and 147 are provided so as to be positioned above and below the back side block 120 with the engaging convex portion 123 protruding from the intermediate connecting block contact surface 125 interposed therebetween.

  As shown in FIGS. 4 and 7, the connecting portions 140 and 141 provided in the front side block 110 described above include an opening recess 151 formed in the intermediate connection block contact surface 115 and an intermediate connection between the opening recess 151. The connecting plate 152 is disposed so as to cover the block contact surface 115 side. The connecting plate 152 is formed by bending a single metal plate, and has a U-shaped cross section having a front surface portion 152a and bent pieces 152b and 152c formed by bending both sides of the front surface portion 152a. Is formed. The connecting plate 152 is embedded in the front block 110 such that the front portion 152a covers the intermediate connecting block contact surface 115 side of the opening recess 151. At this time, it is desirable that the front surface portion 152 a of the connection plate 152 is embedded so as not to protrude from the intermediate connection block contact surface 115.

  The connecting portions 142 and 143 provided in the intermediate connecting block 130 connected to the connecting portions 140 and 141 provided on the front block 110 side are similar to the connecting portions 140 and 141 provided in the front block 110 as shown in FIG. As shown in FIG. 7, it is composed of an opening recess 161 formed in the front block contact surface 133 and a connecting plate 162 arranged to cover the contact surface 133 side of the opening recess 161. The connecting plate 162 is formed by bending a single metal plate, and has a U-shaped cross section having a front surface portion 162a and bent pieces 162b and 162c formed by bending both sides of the front surface portion 162a. Is formed. The connecting plate 162 is embedded in the intermediate connecting block 130 so that the front surface portion 162a covers the front-side block contact surface 133 side of the opening recess 161. At this time, it is desirable that the front surface portion 162 a of the connecting plate 162 is embedded so as not to protrude from the contact surface 133.

  As described above, the connection plates 152 and 162 are embedded in the opening recesses 151 and 161 so that the front surfaces 152a and 162a do not protrude from the contact surfaces 115 and 133. 110 and the contact surfaces 115 and 133 of the intermediate connection block 130 can be securely contacted, so that the front block 110 and the intermediate connection block 130 can be firmly integrated.

  Insertion holes 152d and 162d for attaching the connector 153 are provided in the front portions 152a and 162a of the connecting plates 152 and 162 constituting the connecting portions 140 and 141 and the connecting portions 142 and 143 connected to each other. Yes. Here, as the connection tool 153, for example, a bolt 153a and a nut 153b are used. And between each connection part 140,141 and connection part 142,143, the bolt 153a inserted between these connection parts 140,141 and connection part 142,143, and the nut screwed together by this bolt 153a It is fastened and fixed by 153b.

  Further, the connecting portions 144 and 145 provided on the back side block abutting surface 136 for connecting the intermediate connecting block 130 to the back side block 120 are connected to the front side block 110 of the intermediate connecting block 130 described above. As shown in FIGS. 6 and 10, similarly to the connecting portions 142, 143, the opening concave portion 171 formed in the back side block contact surface 136 and the back side block contact surface 136 side of the opening concave portion 171 are provided. The connecting plate 172 is disposed so as to cover the cover. The connecting plate 172 is formed by bending a single metal plate, and has a U-shaped cross section having a front surface portion 172a and bent pieces 172b and 172c formed by bending both sides of the front surface portion 172a. Is formed. The connecting plate 172 is embedded in the intermediate connecting block 130 so that the front surface portion 172a covers the back block contact surface 136 side of the opening recess 171. At this time, it is desirable that the front surface portion 172 a of the connecting plate 172 is embedded so as not to protrude from the back surface side block contact surface 136.

  The connecting portions 146 and 147 provided on the back side block 120 connected to the connecting portions 144 and 145 provided on the intermediate connecting block 130 side are similar to the connecting portions 144 and 145 provided on the intermediate connecting block 130 as shown in FIG. As shown in FIG. 10, an opening recess 181 formed in the intermediate connection block contact surface 125 and a connection plate 182 disposed so as to cover the intermediate connection block contact surface 125 side of the opening recess 181. Become. The connecting plate 182 is formed by bending a single metal plate, and has a U-shaped cross section having a front surface portion 182a and bent pieces 182b and 182c formed by bending both sides of the front surface portion 182a. Is formed. The connecting plate 182 is embedded in the back side block 120 so that the front surface part 182a covers the intermediate connecting block contact surface 125 side of the opening recess 181. At this time, it is desirable that the front surface portion 182 a of the connecting plate 182 is embedded so as not to protrude from the intermediate connecting block contact surface 125.

  As described above, the connection plates 172 and 182 are embedded in the opening recesses 171 and 181 so that the front surface portions 172a and 182a do not protrude from the contact surfaces 136 and 125. 130 and the abutting surfaces 136 and 125 of the back side block 120 can be reliably abutted, so that the intermediate connecting block 130 and the back side block 120 can be firmly integrated.

  Insertion holes 172d and 182d for attaching the connector 153 are provided in the front portions 172a and 182a of the connecting plates 172 and 182 constituting the connecting portions 144 and 145 and the connecting portions 146 and 147 described above. Yes. Here, as the connection tool 153, for example, a bolt 153a and a nut 153b are used. Between the connecting portions 144 and 145 and the connecting portions 146 and 147, a bolt 153a inserted between the connecting portions 144 and 145 and the connecting portions 146 and 147 and a nut screwed into the bolt 153a. It is fastened and fixed by 153b.

  In order to assemble and integrate the retaining wall block 100 according to the present embodiment having the above-described configuration, first, the pair of intermediate connection blocks 130 and 130 are combined and integrated with the front-side block 110 previously installed. To do.

  At this time, as shown in FIG. 12, each intermediate connection block 130 so that the front end of the engagement protrusion 131 faces the opening of the engagement recess 113 of the front connection legs 112 a and 112 b of the front block 110. , 130 are installed. Next, the intermediate coupling blocks 130 and 130 are moved with respect to the front block 110, and the engagement concave portion 113 and the engagement convex portion 131 are relatively engaged. When the engagement concave portion 113 and the engagement convex portion 131 are relatively engaged, the engagement guide surface 114 of the engagement concave portion 113 and the engagement guide surface 132 of the engagement convex portion 131 are in relative sliding contact with each other. The intermediate connection block contact surface 115 of the block 110 and the front block contact surface 133 of the intermediate connection blocks 130 and 130 are combined so as to face each other.

  Here, as shown in FIG. 13, between the connection plates 140 and 141 and the connection plates 152 and 162 of the connection portions 142 and 143 that are provided in the front block 110 and the pair of intermediate connection blocks 130 and 130, are opposed to each other. The bolts 153a and nuts 153b constituting the connector 153 are fixed. When the connection plates 152 and 162 are tightened by the bolts 153a and nuts 153b constituting the connection tool 153, the front block 110 and the pair of intermediate connection blocks 130 and 130 slide the engagement guide surfaces of each other. However, the engaging convex part 131 enters the engaging concave part 113, and the abutting surfaces 115 and 133 are brought into contact with each other to be integrated.

  The front side block 110 and the pair of intermediate connection blocks are configured such that the engagement concave portion 113 and the engagement convex portion 131 are engaged in this way, and the coupling portions 140 and 141 and the coupling portions 142 and 143 are fixed by the coupling tool 153. 130 and 130 are positioned horizontally with respect to the foundation concrete surface, and deviation from the position is prevented.

  Next, the back side block 120 is combined and integrated with the intermediate connection blocks 130 and 130 previously installed.

  At this time, as shown in FIG. 14, the back-side connection block 120 is installed so that the front end of the engagement protrusion 123 faces the opening of the engagement recess 134 of the intermediate connection blocks 130, 130. Next, the back side block 120 is moved with respect to the intermediate connection blocks 130, 130, and the engagement concave portion 134 and the engagement convex portion 123 are relatively engaged. When the engagement concave portion 134 and the engagement convex portion 123 are relatively engaged, the engagement guide surface 135 of the engagement concave portion 134 and the engagement guide surface 124 of the engagement convex portion 123 are in relative sliding contact with each other. The back-side block contact surface 136 of the blocks 130 and 130 and the intermediate connection block contact surface 125 of the back-side connection block 120 are combined in a state of facing each other.

  Here, as shown in FIG. 15, between the connection plates 144 and 145 and the connection plates 172 and 182 of the connection portions 146 and 147 provided in the pair of intermediate connection blocks 130 and 130 and the back side connection block 120. Is fixed using a bolt 153a and a nut 153b constituting the connector 153. When the connection plates 172 and 182 are tightened by the bolts 153a and nuts 153b constituting the connection tool 153, the pair of intermediate connection blocks 130 and 130 and the back side connection block 120 slide on the engagement guide surfaces of each other. Then, the engaging convex portion 123 enters the engaging concave portion 134, and the abutting surfaces 136 and 125 are brought into contact with each other to be integrated.

  In this way, the pair of intermediate connection blocks 130, 130 and the rear surface are obtained by engaging the engagement concave portion 134 with the engagement convex portion 123 and fixing the connection portions 144, 145 and the connection portions 146, 147 by the connection tool 153. The side connection block 120 is positioned horizontally with respect to the foundation concrete surface, and deviation from the position is prevented.

  Since the retaining wall block 100 combined and integrated in this way supports the main load of each block by the engaging concave portion and the engaging convex portion that are relatively engaged with each other, sufficient load is provided. Strength can be maintained. Further, since the positioning between the blocks is performed by the connecting portion provided between the blocks, it is possible to prevent the positional deviation between the blocks and to integrate the blocks with high accuracy.

  Next, a process of laying the retaining wall block 100 according to the present embodiment and constructing the retaining wall 200 as shown in FIG. 16 on a road slope, for example, will be described.

  In constructing the retaining wall 200 by laying the retaining wall block 100 of the present embodiment, first, as shown in FIG. On this foundation material 220, foundation concrete 210 is laid and a foundation for laying the retaining wall block 100 is constructed.

  And the front side block 110 is installed according to the predetermined position of the foundation concrete 210, for example, the front-end | tip of the foundation concrete 210, and the block 100 for retaining walls is combined along the slope 30 in the above-mentioned procedure.

  After the lowermost retaining wall block 100 is laid, the retaining wall block 100 is combined therewith. At this time, a backing material 230, for example, chestnut stone, gravel, or the like is appropriately packed between the back side block 120 and the slope 30. Then, by placing the concrete concrete between the front side block 110 and the back side block 120 of the laying retaining wall block 100 and between the other retaining wall blocks 100, the retaining wall is firmly integrated. Can be constructed. In particular, the retaining wall block according to the present invention is composed of the front side block 110, the intermediate connection blocks 130 and 130, and the rear side block 120, which are integrally formed of concrete. If the concrete is cast in, it can be firmly integrated as a concrete structure and a retaining wall with high load strength can be constructed.

  In addition to the process of assembling along the above-mentioned basic concrete 210, the front side block 110, the intermediate connection blocks 130 and 130, and the back side block 120 are connected at a place slightly apart from the place where the laying is planned. It is also possible to adopt a process of forming the block 100 and lifting and laying the retaining wall block 100 by heavy machinery. In this process, when the retaining wall block 100 is lifted by using a heavy machine, the weight of each block is supported by the engaging recesses and the engaging protrusions that are engaged with each other, so that the weight is concentrated on the connecting portions 140 to 147. Without causing misalignment between the blocks.

  Further, the front block 110, the intermediate connection blocks 130 and 130, and the rear block 120 are integrated in advance at the factory, and the integrated retaining wall block 100 is transported to the construction site, and is integrally formed with the heavy concrete block. It is also possible to pile up in the same way. Even when this step is adopted, the retaining wall block 100 is supported by each block due to the engagement structure of the engagement concave portion and the engagement convex portion. It is possible to prevent misalignment between the blocks without concentrating.

  The retaining wall block 100 according to the embodiment of the present invention has been described above. The intermediate connection blocks 130 and 130 of the retaining wall block 100 are arranged in the direction between the front block 110 and the rear block 120. The width W1 is appropriately selected.

  That is, by appropriately selecting the width W1 of the intermediate connecting blocks 130 and 130 shown in FIG. 3, it is possible to form the retaining wall block 100 having an optimum size according to the earth pressure on the slope.

  For example, when the slope pressure of the slope is large, as shown in FIG. 17, the width W2 of the intermediate connection blocks 130, 130 of the retaining wall block 100 is made larger than that shown in FIG. It is possible to increase the depth of the retaining wall block 100 and construct a strong retaining wall that does not collapse easily.

  Further, the intermediate connection blocks 130 and 130 disposed between the front side block 110 and the back side block 120 increase or decrease the number connected in the direction between the front side block 110 and the back side block 120. You can also. Thereby, the block 100 for retaining walls of the optimal dimension according to the earth pressure of a slope can be formed.

  For example, when the slope pressure is large, as shown in FIG. 18, a pair of intermediate connection blocks 130, 130 are connected to the front block 110, and another pair of intermediate connection blocks 130, 130 are connected to the pair of intermediate connection blocks 130, 130. The intermediate connection blocks 130 and 130 are connected in series, and the back side block 120 is connected to the other pair of intermediate connection blocks 130 and 130, so that the depth of the retaining wall block 100 is deepened and is not easily collapsed. It is possible to construct a retaining wall.

  On the other hand, when the slope pressure is small, as shown in FIG. 19, the front block 110 and the back block 120 are directly combined and integrated without using the intermediate connection blocks 130 and 130. A wall block 100 may be used. That is, in the present embodiment, a configuration that allows the front side block 110 and the back side block 120 to be directly combined and integrated is adopted, so that the intermediate connection block may be omitted depending on the construction location of the retaining wall. The manufacturing cost can be reduced and the construction of the retaining wall can be simplified.

  In addition, in the retaining wall block 100, when an engagement recess is formed in a block that is installed first, an engagement projection that is engaged with the engagement recess is necessarily formed in the block that is installed next. Therefore, it is constituted by a continuation of the procedure of engaging the engaging convex portion with the engaging concave portion. For this reason, as described above, even if the quantity of the intermediate connection blocks 130 and 130 is increased in the direction extending between the front block 110 and the rear block 120, the same work is repeated, so that the combination work There will be no complications.

  In addition, the front side block 110, the back side block 120, and the intermediate connection block 130 that constitute the retaining wall block 100 are integrally formed of concrete, and are configured to be relatively engaged with each other. As described above, even when the quantity of the intermediate connection blocks 130 and 130 is increased in the direction extending between the front block 110 and the rear block 120, the combined state of the blocks 110, 120, and 130 is maintained. Sufficient load strength can be maintained.

  Furthermore, as shown in FIG. 20, a pair of left and right intermediate connection blocks 130, 130 may be formed as an integrally formed intermediate connection block in which the connection portions 137 are connected. In this way, it is possible to form the retaining wall block 100 having higher load strength by integrally forming the pair of left and right intermediate connection blocks.

  In the retaining wall block 100 according to the present embodiment, each connection portion of the front side block 110, the intermediate connection blocks 130 and 130, and the back side connection block 120 is configured by an opening recess and a connection plate. However, as shown in FIG. 21, the connecting portions 146 and 147 provided in the back-side block 120 may be configured as bolt insertion holes 183 through which the bolts 153a constituting the connecting tool 153 are inserted. The bolt insertion hole 183 is formed so as to penetrate from the back side to the front side of the back side block 120.

  The rear block 120 having such a configuration is installed such that the intermediate connection block contact surface 125 contacts the rear block contact surface 136 of the intermediate connection blocks 130 and 130, and the bolt 153 a is connected to the bolt insertion hole 183 and the intermediate insertion block 183. It can be connected to the intermediate connection blocks 130 and 130 by being inserted into the insertion holes 172d of the connection plate 172 disposed in the connection blocks 130 and 130 and tightened with the nut 153b.

  In addition, when placing the concrete, the front side block 110, so that the ready-mixed concrete can be distributed evenly between the front side block 110 and the rear side block 120 and between the retaining wall block 100 and the retaining wall block 100. The back side block 120 and the intermediate connection block 130 may be formed with 190 and 191 which are cutouts constituting the concrete flow path. By forming such a cut-out, the ready-mixed concrete spreads uniformly between the front side block 110 and the back side block 120 and between the retaining wall block 100 and the retaining wall block 100, and the retaining wall is firmly integrated. Can be constructed.

  In addition, when the retaining wall blocks 100 are stacked, for example, convex portions 116 are provided on the upper surfaces of the front side connecting leg portions 112a and 112b so that the upper and lower retaining wall blocks 100 are engaged with each other. It is also possible to provide a concave portion 117 corresponding to the convex portion 116 on the bottom surface of the portions 112a and 112b. As a result, when the retaining wall blocks 100 are stacked, the upper and lower retaining wall blocks 100 are relatively engaged to prevent swinging after the stacking, and a stable retaining wall can be constructed and a safe retaining wall can be constructed. I can plan.

  In the above description, the engagement between the engagement concave portion of the front connection leg and the engagement convex portion of the intermediate connection block, and the engagement concave portion of the intermediate connection block and the engagement convex portion of the back side connection leg. Although the retaining wall block by engagement is illustrated, similarly, the front side connecting leg is provided with an engaging convex part, and the intermediate connecting block is provided with an engaging concave part accordingly, and both parts are engaged, A retaining wall block having a configuration in which an engaging convex portion is provided in the intermediate connecting block and an engaging concave portion is provided in the back side connecting leg portion in accordance with the engaging convex portion, and both portions engage with each other can be adopted.

  The preferred embodiments of the present invention have been described above, but the present invention is not limited to specific embodiments, and various modifications and changes can be made within the scope of the gist of the present invention described in the claims. Is possible.

  30 slope, 100 retaining wall block, 110 front block, 111 front wall, 112a, 112b front connection leg, 113 engagement recess, 114 engagement guide surface, 115 intermediate connection block contact surface, 116 convex , 117 bottom recess, 120 back block, 121 back wall, 122a, 122b back connection leg, 123 engagement protrusion, 124 engagement guide surface, 125 intermediate connection block contact surface, 130 intermediate connection block, 131 Engagement convex part, 132 Engagement guide surface, 133 Front side block contact surface, 134 Engagement recess, 135 Engagement guide surface, 136 Back side block contact surface, 137 Consecutive part, 140 Connection part, 141 Connection part 142 connecting part, 143 connecting part, 144 connecting part, 145 connecting part, 146 connecting part, 147 connecting part, 151 open Recessed part, 152 connecting plate, 152a front part, 152b bent piece, 152c bent piece, 152d insertion hole, 153 connecting tool, 153a bolt, 153b nut, 161 opening recessed part, 162 connecting plate, 162a front part, 162b bent piece, 162c bent Piece, 162d insertion hole, 171 opening recess, 172 connection plate, 172a front surface, 172b bending piece, 172c bending piece, 172d insertion hole, 181 opening recess, 182 connection plate, 182a front surface portion, 182b bending piece, 182c bending piece, 182d insertion hole, 183 bolt insertion hole, 190 cutout, 191 cutout, 200 retaining wall, 210 foundation concrete, 220 foundation material, 230 backfilling material.

Claims (6)

A rectangular front wall is integrally formed, and a front block made of concrete in which a pair of front side connecting legs are integrally formed in parallel on the rear side of the front wall, and a rectangular rear wall A concrete back-side block formed integrally with a pair of back-side connecting legs on the front side of the back wall, and the pair of front-side connecting legs and the pair of front-side connecting legs. A pair of concrete intermediate connection blocks respectively interposed between the back side connection legs,
There is an engagement convex portion that engages with each other between a contact surface that contacts the intermediate connection block of the front-side connection leg portion and a contact surface of the intermediate connection block that contacts the contact surface. And the engagement convex portion and the engagement recess when the front-side connection leg portion and the intermediate connection block are combined by abutting and abutting each other on the contact surfaces. It is formed at a height and depth at which a gap is formed between the front end portion of the joint convex portion and the engagement concave portion
There is an engagement convex portion that engages with each other between a contact surface that contacts the intermediate connection block of the back side connection leg portion and a contact surface of the intermediate connection block that contacts the contact surface. A mating recess is provided, and the engagement convex portion and the engagement recess when the rear side connecting leg portion and the intermediate connecting block are combined with each other abutting and abutting against each other. It is formed at a height and depth at which a gap is formed between the front end portion of the joint convex portion and the engagement concave portion
Between the front block and the intermediate connection block, the front block and the intermediate connection block abut the contact surface of the front connection leg and the contact surface of the intermediate connection block. When combined, a connecting portion for connecting the front side block and the intermediate connecting block is provided,
Between the back side block and the intermediate connection block, the back side block and the intermediate connection block contact the contact surface of the back side connection leg and the contact surface of the intermediate connection block. When combined, a connecting portion for connecting the back side block and the intermediate connecting block is provided,
The front side block, the intermediate connecting block, and the back side block are combined by engaging the engagement convex portion and the engagement concave portion provided between the blocks and bringing the abutment surfaces into abutment and contact with each other. The retaining wall block is characterized in that the connecting portion provided between the blocks is connected and integrated by a connecting tool.   The connecting portion for connecting the blocks consists of a connecting plate disposed so as to cover the contact surface side of the opening recess formed in the opposing surface of the blocks when the blocks are combined. 2. The retaining wall block according to claim 1, wherein the blocks are integrated by connecting and fixing the opposing connecting plates with a connecting tool.   Between the engagement convex part and the engagement concave part, when the engagement convex part and the engagement concave part engage with each other, the engagement direction of the engagement convex part and the engagement concave part is guided. The retaining wall block according to claim 1, wherein an engagement guide surface is provided.   A plurality of intermediate connection blocks having different widths in the direction connecting the front side block and the back side block, and having an intermediate connection block having one width selected from the plurality of intermediate connection blocks having different widths By interposing between the front side block and the back side block by interposing between the front side block and the back side block, in the direction from the front side block to the back side block. The retaining wall block according to any one of claims 1 to 3, wherein the length is variable.   A plurality of pairs of intermediate connection blocks are connected between the front block and the back block in a direction extending between the front block and the back block. The block for retaining walls of any one of 1-4. The retaining wall block according to any one of claims 1 to 5, wherein the pair of intermediate connection blocks are one intermediate connection block that are connected to each other and are integrally formed.