JP2010168743A - Drainage block doubling as retaining wall masonry foundation, method for constructing roadside structure, and the roadside structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a covered conduit block which achieves space savings, a reduction in the number of man-hours of construction, the shortening of a construction period, etc. <P>SOLUTION: This drainage block doubling as a retaining wall masonry foundation includes a block body 3 which is formed with a retaining wall masonry foundation wall portion 11 inclined in a direction almost orthogonal to the installation direction of a retaining wall 2, and a drainage passage 10 which is provided in the block body 3. The block body 3 is installed adjacently to another block body 3. Thus, the retaining wall masonry foundation wall portions 11 continue into each other, and the drainage passages 10 continue into each other. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a culvert embedded in a side of a road or the like and serving as a drainage channel for groundwater or spring water, and more particularly to a retaining wall stacking foundation combined drainage block that can also be used as a retaining wall stacking foundation.

  It is necessary to install a retaining wall to prevent the ground from collapsing on the ground where there is a height difference such as a cliff or steep slope. This type of retaining wall is made of, for example, a reinforced concrete wall or a wall formed by laminating concrete blocks. In installing the retaining wall, a basic footing is generally formed at the bottom of the retaining wall. The foundation footing has a wide contact area for transmitting the load acting on the retaining wall (earth pressure) and the weight of the retaining wall to the supporting ground, and functions to prevent the retaining wall from falling.

  Moreover, in the road which has a retaining wall on one side, as shown in FIG. 15, a road-side structure which installs a retaining wall, installs a U-shaped waterway etc. in the front of a retaining wall, performs earth retaining, and drains roadside. Is often adopted. Such a roadside structure is constructed by constructing a foundation footing of cast-in-place concrete, stacking a retaining wall block on top of it, and then installing a U-shaped waterway or the like on the front surface.

  Specifically, first, the site where the roadside structure is constructed is excavated (FIG. 16A). At this time, the excavation range is secured in advance with a width sufficient to install the foundation footing and the U-shaped waterway. After excavation, the slope is molded. Next, a foundation footing is installed (FIG. 16B), and the backing material is charged and the retaining wall blocks are stacked (FIG. 16C). After installing the top concrete and finishing the retaining wall construction process, the process then moves to the U-shaped waterway installation process.

  First, the installation location of the U-shaped waterway is dug (FIG. 16 (d)). Next, after crushing crushed stones or the like at the place where the U-shaped water channel is installed to form a foundation, the U-shaped water channel is installed (FIG. 16E). Finally, backfilling and compacting of the excavation site is performed.

JP 2005-146849 A

  According to the construction method of the roadside structure, in addition to excavation of the installation range of the foundation footing where the retaining wall blocks are stacked, excavation of the installation area of the U-shaped waterway is required, and after the construction, a backfilling process of the excavation part is required. . Therefore, man-hours and time are required for the construction. In addition, since the U-shaped waterway is installed in front of the retaining wall, the excavation range is increased. As shown in FIG. 4A, the road width is narrowed by occupying the roadside space. In addition, as shown in FIG. 5 (a), there is a limit to the effective use of land depending on the installation space of the retaining wall and the U-shaped waterway even when building on a residential land development site or the like.

  Therefore, the present invention aims to save space, reduce the number of construction steps, shorten the construction time, etc., retaining wall loading foundation combined drainage block, roadside structure construction method using this retaining wall loading foundation combined drainage block, and roadside The purpose is to provide a structure.

  In order to solve the above-described problem, the retaining wall stacking foundation combined drainage block according to the present invention includes a block main body formed with a retaining wall stacking foundation wall portion inclined in a direction substantially orthogonal to the installation direction of the retaining wall, and A drainage channel provided in the block body, and the block body is installed adjacent to the other block body so that the retaining wall stacking base wall portions and the drainage channels are continuous with each other. It is.

  In addition, the roadside structure construction method according to the present invention includes a block main body in which a retaining wall stacking base wall portion that is inclined in a direction substantially perpendicular to the installation direction of the retaining wall, and a drainage channel provided in the block main body. And digging the installation surface of the retaining wall stacking foundation combined drainage block in which the retaining wall stacking foundation wall portions and the drainage channels are continuous by installing the block body adjacent to each other, Forming the foundation on the installation surface, and installing a plurality of the retaining wall stacking foundation combined drainage blocks adjacent to each other on the foundation, so that the retaining wall stacking foundation wall portions and the drainage And a step of installing the retaining wall on the retaining wall stacking base wall portion of the retaining wall stacking foundation combined drainage block.

  The roadside structure according to the present invention includes a block main body in which a retaining wall stacking base wall portion that is inclined in a direction substantially orthogonal to the installation direction of the retaining wall and a drainage channel provided in the block main body. Sediment that has a retaining wall stacking foundation combined drainage block, a mounting wall surface having the same inclination angle as the retaining wall stacking foundation wall part, and a water introduction hole having the same diameter as the drainage channel, and has flowed in from the drainage channel And a water collecting basin having an earth and sand reservoir on which the sediment is accumulated, and the block main body is installed adjacent to the other block main body so that the retaining wall pile foundation wall portions are continuously flush with each other. In addition, the drainage channels are continuous with each other, and the water collecting trough is disposed adjacent to the block body, whereby the placement wall surface and the retaining wall stacking base wall portion are continuously flush with each other. The water conduction hole and the drainage channel are continuous It is intended to be.

  According to the present invention, since the retaining wall pile foundation and the drainage channel are integrated, floor digging in the retaining wall loading foundation installation region and the drainage channel installation region becomes unnecessary, and the floor digging range and the backfilling range are reduced. It can be narrowed. Moreover, according to this invention, compared with the conventional structure with which the retaining wall pile foundation and the drainage channel are adjacent, the area | region which occupies a road side becomes narrow, and a width | variety can be expanded.

It is a side view which shows the roadside structure constructed | assembled using the foundation drainage block. It is a figure which shows the basic | foundation drainage block concerning this invention. It is a side view which shows the construction process of the roadside structure concerning this invention. It is a side view which compares and shows each width | variety of the conventional roadside structure and the roadside structure of this invention. It is a side view which compares and shows each residential land range of the conventional roadside structure and the roadside structure of this invention. It is a side view which shows the washing process of a drainage channel. It is a side view which compares and shows each groundwater level of the conventional roadside structure and the roadside structure of this invention. It is a figure which shows a catchment basin. It is a side view which shows the roadside structure using a cast-in-place concrete retaining wall. It is a side view which shows the roadside structure which constructed the retaining wall foundation with cast-in-place concrete. It is a side view which shows the roadside structure by which the foundation drainage block corresponding to a large retaining wall block was arrange | positioned. It is a side view which shows the roadside structure by which the foundation drainage block was arrange | positioned in the place without a cliff or a steep slope. It is a side view which shows the roadside structure where flat concrete was laid. It is a side view which shows the roadside structure in which the curb was provided. It is a side view which shows the conventional roadside structure. It is a side view which shows the construction process of the conventional roadside structure.

<Basic drainage block>
Hereinafter, a construction method of a retaining wall stacking foundation combined drainage block to which the present invention is applied and a roadside structure using the retaining wall stacking foundation combined drainage block will be described in detail with reference to the drawings. As shown in FIG. 1, the retaining wall stacking foundation combined drainage block 1 to which the present invention is applied is embedded in the roadside or residential land, as shown in FIG. As well as being used as a culvert. As shown in FIGS. 2A to 2C, the basic drainage block 1 is composed of a block body 3 having a laying direction as a longitudinal direction, and a drainage channel along the longitudinal direction inside the hollow block body 3. 10 is formed. 2A is a perspective view of the basic drainage block 1, FIG. 2B is a plan view of the basic drainage block 1, and FIG. 2C is a rear view of the basic drainage block 1.

  Further, the foundation drainage block 1 is formed with a retaining wall stacking foundation wall portion 11 on which the retaining wall block is placed, and a top surface portion 12 that is formed in parallel with the ground and faces the ground surface. . And the drainage channel 10, the retaining wall pile foundation wall part 11, and the top | upper surface part 12 are continued by the foundation drainage block 1 being continued in the laying direction, respectively, and can be used as the foundation and underdrain of the retaining wall 2.

  The foundation drainage block 1 is formed with a contact surface 13 that abuts against a slope and a retaining wall stacking foundation wall portion 11 facing the cliff and the steep slope side. The abutting surface 13 is a surface that abuts against a sloped and shaped slope, and is an inclined surface having a predetermined inclination angle. The contact surface 13 is formed with a plurality of water introduction holes 15 that guide the back spring water to the drainage channel 10 in the longitudinal direction. One end of the water guide hole 15 faces the drainage channel 10, and the other end faces the contact surface 13, thereby contacting the ground.

  The retaining wall pile foundation wall 11 is an inclined surface formed on the upper surface side of the retaining wall foundation block 1, and the retaining wall 2 is placed thereon. The retaining wall stacking base wall portion 11 is formed continuously from the upper edge of the contact surface 13 and has a predetermined angle corresponding to the installation angle of the retaining wall 2. Further, the retaining wall stacking base wall portion 11 is formed with a locking step portion 16 at the upper edge, and is continuous with the top surface portion 12 through the locking step portion 16.

  The locking step portion 16 is a step portion that protrudes upward from the main surface of the retaining wall stacking base wall portion 11, and supports and stabilizes the retaining wall 2 by locking corner portions of the retaining wall 2. Can be achieved. The top surface portion 12 that is continuous with the locking step portion 16 is a surface that faces the ground surface when the foundation drainage block 1 is embedded, and is a flat surface that is substantially parallel to the ground surface. The top surface portion 12 is formed with a plurality of drainage slits 17 inscribed in the inner peripheral wall of the drainage channel 10 formed in a cylindrical shape over the longitudinal direction.

  The drainage slit 17 supplies a water flow for discharging sediment accumulated in the drainage channel 10 into the drainage channel 10, and is formed in a direction substantially inscribed in the inner peripheral wall of the cylindrical drainage channel 10. It is a rectangular slit. The drainage slit 17 faces the lower end so as to be continuous with the inner peripheral wall of the drainage channel 10, and is exposed to the outside when the base drainage block 1 is buried with the upper end facing the top surface portion 12. .

  The drainage slit 17 can flow a spiral water flow along the inner peripheral wall into the drainage channel 10 when rainwater is introduced from the upper end facing the ground surface or cleaning water is supplied. . Thereby, the foundation drainage block 1 can drain the earth and sand deposited in the drainage channel 10, and can perform pipe | tube washing | cleaning.

  Further, the drainage slit 17 is formed so as to increase in width from the upper end facing the ground surface to the lower end continuous in the drainage channel 10. The drainage slit 17 is widened from the upper end to the lower end, thereby preventing clogging in the slit when dust or earth and sand enters from the ground surface. Moreover, by forming the taper shape, the core material for forming the drainage slit 17 can be easily removed when the basic drainage block 1 is molded.

  As shown in FIG. 1, in the foundation drainage block 1, the drainage channel 10 may be provided in the projection surface of the main surface portion of the retaining wall stacking foundation wall portion 11. By providing the drainage channel 10 in the projection plane of the main surface portion of the retaining wall stacking foundation wall portion 11, the foundation drainage block 1 can suppress the size in the width direction orthogonal to the longitudinal direction, and can suppress the floor excavation range. The construction of the road can be simplified, and the road width can be increased by suppressing the area occupied by the block body 3 on the road side.

<Construction method of roadside structure>
Subsequently, the construction method of the roadside structure using the foundation drainage block 1 is demonstrated. As shown in FIG. 3 (a), first, a road is dug on a road where a retaining wall is constructed on one side, and slope shaping is performed. At this time, in the roadside structure using the foundation drainage block 1, it is not necessary to dig up to a range sufficient to install the foundation footing and the U-shaped waterway. That is, since the foundation drainage block 1 serves as both the retaining wall foundation and the drainage channel, the floor excavation range may be sufficient to install the foundation drainage block 1. Therefore, the space required to install the retaining wall foundation and the drainage block can be reduced, the work can be saved and shortened along with the reduction of the excavation area, and the road shoulder can be formed widely. it can.

  Next, as shown in FIG. 3 (b), a foundation 20 made of crushed stone or the like for installing the foundation drainage block 1 is formed in the excavation site 19, and an adjustment layer 21 is formed by applying a mortar on the foundation 20. After that, the basic drainage block 1 is installed on the adjustment layer 21. At this time, the foundation drainage block 1 is installed so that the contact surface 13 is brought into contact with the slope 22 that has been digged and leveled. Thereby, the basic drainage block 1 has the water guide hole 15 opened in the contact surface 13 facing the slope, and can guide the back spring water to the drainage channel 10. At this time, a suction prevention mat or the like is appropriately laid between the slope 22 and the water guide hole 15. The basic drainage block 1 is installed with the top surface portion 12 parallel to the ground 23 and at substantially the same height.

  Next, as shown in FIG. 3 (c), the retaining wall 2 is constructed on the retaining wall stacking base wall portion 11. A general construction method can be used for the construction of the retaining wall 2. Specifically, it is constructed through steps such as charging of backfilled crushed stone 5, retaining wall block product, placing and filling backfilled concrete 6 and trunked concrete, and placing top concrete 7.

  At this time, as shown in FIG. 1, the retaining wall block is placed with its upper end locked on a locking step 16 formed on the retaining wall stacking base wall 11. Since there is a gap between the retaining wall block and the top surface portion 12, the filling mortar 22 is filled.

  Further, the excavation site 19 is backfilled. In the backfilling process, construction is performed so that the top surface 12 of the basic drainage block 1 is continuous from the ground 23 and exposed to the outside. Thereby, as for the basic drainage block 1, the slit 17 for drainage opened to the top | upper surface part 12 is faced outside.

<Roadside structure>
Thus, according to the foundation drainage block 1, since the retaining wall pile foundation and the drainage channel are integrated, in the construction process of the roadside structure, the floor of the retaining wall loading foundation installation region and the drainage channel installation region Excavation becomes unnecessary (see FIG. 16), and the floor excavation range and the backfill range can be narrowed. Moreover, the roadside structure constructed using the foundation drainage block 1 can occupy the area on the roadside and can increase the width compared to the conventional structure in which the retaining wall pile foundation and the drainage channel are adjacent to each other. .

  Therefore, as shown in FIG. 4B, when the width of the road occupies a predetermined width and the road shoulder is used as a sidewalk or the like, according to the roadside structure using the basic drainage block 1, the conventional structure (FIG. 4A) Compared to), the shoulder width can be expanded, and the width can be effectively utilized. Moreover, as shown in FIG.5 (b), by using the foundation drainage block 1 for the housing land facing a cliff, a steep slope, etc., compared with the conventional structure (Fig.5 (a)), it becomes a retaining wall and a drainage channel. The required width can be suppressed, the area devoted to building construction can be expanded, and the residential land can be used effectively.

  In addition, since the drainage slit 17 facing the ground faces the inner peripheral wall of the drainage channel 10 from the one end side facing the ground, the foundation drainage block 1 from the road surface during rainfall. The collected rainwater is poured, and at the time of maintenance, high-pressure washing water is poured from the high-pressure nozzle 30, so that a spiral water flow that flows along the inner peripheral wall can flow in the drainage channel 10. Thereby, the basic drainage block 1 can drain the earth and sand accumulated in the drainage channel 10 efficiently, and can perform pipe | tube washing | cleaning (FIG. 6).

  Moreover, since the latching step part 16 is formed in the foundation drainage block 1 between the retaining wall pile foundation wall part 11 and the top | upper surface part 12, the sliding of the retaining wall 2 is suppressed and stability is improved. Can do.

  Further, the basic drainage block 1 opens the water guide hole 15 in contact with the slope 22 of the cliff or steep slope on the contact surface 13, and guides the back spring water by continuing to the drainage channel 10. According to the roadside structure using such a basic drainage block 1, as shown in FIG. 7 (b), compared to the conventional structure shown in FIG. As described above, since the position where the back spring water is led out is lower, the groundwater level is lowered, and the slope can be prevented from collapsing due to rainfall or groundwater.

<Catchment>
A plurality of the foundation drainage blocks 1 are continued in the longitudinal direction, whereby the drainage channel 10, the retaining wall pile foundation wall part 11, the top surface part 12, and the contact surface 13 are continued. Between the basic drainage blocks 1, water collecting basins 24 are interposed at predetermined intervals. The catchment basin 24 is formed to have a larger outer shape than the basic drainage block 1 indicated by a dotted line in FIG.

  The drainage basin 24 is formed with a sediment reservoir 25 that is continuous with the drainage channel 10 in a hollow interior. Further, the water collecting basin 24 is continuous with the retaining wall stacking base wall portion 11 on the outer surface, and is flush with the mounting wall surface 26 on which the retaining wall block is placed, and the top surface portion 12, and is cleaned. An upper surface portion 28 in which an opening 27 into which the instrument is inserted is formed, and an abutting surface 29 which is continuous with the abutting surface 13 and abuts against the slope is formed.

  The earth and sand reservoir 25 is a place where earth and sand, dust and the like flowing through the drainage channel 10 are accumulated. As shown in FIG. 8B, the earth and sand reservoir 25 is partitioned on both sides in the longitudinal direction by side walls 32 in which water guide holes 31 continuous with the drainage channel 10 are formed. The water guide hole 31 is a circular opening having substantially the same diameter as the drainage channel 10, and is continuous with the drainage channel 10 by being formed approximately in the middle of the side wall 32 in the vertical direction. Since the water guide hole 31 is formed substantially in the middle of the side wall, the earth and sand reservoir 25 accumulates earth and sand or dust surrounded by the side surface in the width direction perpendicular to the longitudinal direction of the side wall 32 and the water collecting basin 24. 33 is formed.

  Further, as shown in FIG. 8A, the earth and sand reservoir 25 is formed from the bottom of the flow path of the drainage channel 10 to the position where the accumulation portion 33 is shifted in the width direction, and the flow path of the drainage channel 10 is the top surface. It is formed at a position shifted in the width direction from directly below the portion 28. Therefore, the earth and sand reservoir 25 is able to prevent sediment and dirt flowing in from the drainage channel 10 from being accumulated at a position shifted from the flow path of the drainage channel 10 and flowing out into the drainage channel 10 again. The earth and sand reservoir 25 is formed with an inclined surface portion 34 that guides earth and sand and dust to a position shifted in the width direction from the lower part of the flow path of the drainage channel 10 immediately below the water guide hole 31. Therefore, the earth and sand reservoir 25 can prevent earth and sand, dust, and the like from being collected at a position shifted from the flow path of the drainage channel 10 and flowing out into the drainage channel 10 again.

  The water collecting basin 24 is formed with positioning step portions 35 for positioning the basic drainage block 1 on the side walls 32 formed on both sides in the longitudinal direction continuous with the basic drainage block 1. The positioning step 35 is placed on both side surfaces of the basic drainage block 1 that is continuous on both sides in the longitudinal direction. As a result, the positions of the drainage basin 24 and the foundation drainage block 1 are determined. The contact surfaces 13 and 29 are continuous.

  The mounting wall surface 26 on which the retaining wall block is placed is formed with the same width and the same inclination as the retaining wall stacking base wall portion 11 described above, and is continuous with the same surface. Further, the mounting wall surface 26 is formed with a locking step portion 36 at the upper edge, and is continuous with the upper surface portion 28 via the locking step portion 36. The locking step portion 36 is a step portion that protrudes upward from the main surface of the mounting wall surface 26, and supports and stabilizes the retaining wall 2 by engaging the corner portion of the retaining wall 2. Can do.

  The upper surface portion 28 that is continuous with the locking step portion 36 is a surface that faces the ground surface when the foundation drainage block 1 is buried, and is formed on a flat surface that is substantially parallel to the ground surface. 12 and the same level. As shown in FIG. 8C, the upper surface portion 28 is formed with an opening 27 into which a cleaning tool is inserted at a substantially central portion. A grating 37 is fitted in the opening 27.

  In addition, the opening 27 is formed at a position shifted in the width direction from the water guide hole 31, so that when the earth and sand accumulated in the earth and sand reservoir 25 are removed, the earth and sand collected by the cleaning tool is drained. It becomes difficult to be caused to flow by the water flow flowing through the ten flow paths.

<Other embodiments>
The retaining wall 2 placed on the retaining wall stacking foundation wall portion 11 of the foundation drainage block 1 may be constructed by laminating concrete retaining wall blocks or may be a precast concrete retaining wall. Moreover, the retaining wall 2 can also be constructed by laminating a planting block and a well block.

  The retaining wall can also be constructed by a cast-in-place concrete retaining wall 40 as shown in FIGS. In this case, a so-called equal thickness type (FIG. 9A) in which the thickness of the retaining wall is constant, and a leaning type that resists earth pressure by tilting the front surface of the retaining wall to the slope side (FIG. 9B). )), Any gravity type that resists earth pressure by its own weight and is self-supporting (FIG. 9C) can be constructed. At this time, a reinforcing bar 38 that provides connection strength is interposed between the cast-in-place concrete retaining wall 40 and the foundation drainage block 1. The reinforcing bar 38 is supported by inserting one end side into an insert hole 39 previously drilled in the contact surface 13 of the basic drainage block 1, and the other end side is embedded in the cast-in-place concrete retaining wall 40. The

  The cast-in-place concrete retaining wall 40 is placed over the retaining wall stacking foundation wall portion 11 and the abutting surface 13 of the foundation drainage block 1 and the mounting wall surface 26 and the abutting surface 29 of the water collecting basin 24. , Formed to be locked to the locking step 16. As a result, as shown in FIG. 9 (d), the cast-in-place concrete retaining wall 40 is in the collapse direction by being locked to the contact surfaces 13, 29 and the locking step portion 16. Oscillation in the middle arrow C direction is restricted.

  Further, when the retaining wall becomes larger and cannot be placed on the retaining wall stacking foundation wall portion 11, it is added by placing a cast-in-place concrete retaining wall foundation 42 in the excavation site 19 as shown in FIG. be able to. The cast-in-place concrete retaining wall foundation 42 is formed on a foundation 43 made of crushed stone or the like formed in the excavation site 19. Further, the cast-in-place concrete retaining wall foundation 42 is placed over the retaining wall stacking foundation wall portion 11 and the contact surface 13 of the foundation drainage block 1 and the mounting wall surface 26 and the contact surface 29 of the water collecting basin 24. At the same time, the reinforcing bars 43 improve the strength. The reinforcing bar 43 is supported by inserting one end side into an insert hole 44 drilled in the abutment surface 13 of the foundation drainage block 1 and the retaining wall stacking foundation wall portion 11, and the other side is cast-in-place concrete retaining wall. It is embedded in the foundation 42.

  Further, the basic drainage block can be formed in advance corresponding to the enlarged retaining wall block. As shown in FIG. 11, the foundation drainage block 51 corresponding to the large retaining wall block 50 has a retaining wall stacking foundation wall portion 52 on which the large retaining wall block 50 is placed, and is formed with a reinforcing bar inside. 43 is buried. Further, the foundation drain block 51 is formed with a stepped portion 54 in which the large retaining wall block 50 is locked to the retaining wall stacking foundation wall portion 52 and a locking step portion 56 provided between the top surface portion 55. ing. In the basic drainage block 51, a step portion 50 a formed according to the shape of the step portion 54 is locked to the bottom surface of the large retaining wall block 50, and a corner portion 50 b of the large retaining wall block 50 is locked to the locking step portion 56. It is locked to. Thereby, the basic | foundation drainage block 51 can suppress the sliding of the large retaining wall block 50, and can support it stably.

  The basic drainage block 51 includes a drainage channel 57, a contact surface 58, and a top surface portion 55. The drainage channel 57 has the same configuration as the drainage channel 10 of the basic drainage block 1 described above, and the contact surface 58 has the same configuration as the contact surface 13 of the basic drainage block 1 described above, and the top surface portion. Since 55 has the same configuration as the top surface portion 12 of the basic drainage block 1 described above, details thereof are omitted.

  When there are no cliffs or steep slopes depending on the location, the foundation drainage block 1 causes the top surface 12 to face the ground as shown in FIG. 12 and backfills the earth and sand on the retaining wall foundation wall 11. . Moreover, as shown in FIG. 13, the foundation drainage block 1 may form the flat concrete 60 on the retaining wall pile foundation wall part 11 as needed. The flat concrete 60 is formed so as to be flush with the top surface 12 and to be locked at one side by the locking step 16. Furthermore, as shown in FIG. 14, the foundation drainage block 1 can mount the curbstone 61. The curb 61 is provided on a curb foundation 62 formed on the retaining wall stacking foundation wall 11. The curb base 62 is formed of mortar or the like. Further, the curb 61 is positioned by locking the corner portion to the locking step portion 16, and sliding is prevented.

DESCRIPTION OF SYMBOLS 1 Base drainage block, 2 Retaining wall, 3 Block main body, 10 Drainage channel, 11 Retaining wall pile foundation wall part, 12 Top surface part, 13 Contact surface, 15 Water conveyance hole, 16 Locking step part, 17 Drainage slit, 19 Excavation site, 20 foundation, 21 adjustment layer, 23 ground, 24 catchment basin, 25 sediment reservoir, 26 mounting wall, 27 opening, 28 top surface, 29 contact surface, 31 water conveyance hole, 32 side wall, 33 water collection 35, positioning step, 36 locking step, 37 grating, 38 reinforcing bar, 39 insert hole, 40 cast-in-place concrete retaining wall, 42 cast-in-place concrete retaining wall foundation, 43 reinforcing bar, 50 large retaining wall block, 51 Foundation drainage block, 52 Retaining wall stacking foundation wall part, 54 Step part, 55 Top surface part, 56 Locking step part, 57 Drainage channel, 58 Contact surface, 60 Flattened concrete Doo, 61 curb, 62 curb foundation

Claims (14)

A block body in which a retaining wall stacking base wall portion inclined in a direction substantially perpendicular to the installation direction of the retaining wall is formed;
A drainage channel provided in the block body,
The retaining wall stacking foundation combined drainage block in which the retaining wall stacking foundation wall portions and the drainage channels are continuous by the block body being installed adjacent to the other block body.   The retaining wall stacking foundation drainage block according to claim 1, wherein the retaining wall stacking foundation wall portion is formed with a locking step portion in which a corner portion of the retaining wall is locked. The drainage channel is formed in a substantially cylindrical shape,
The retaining wall stacking foundation combined drainage block according to claim 1, wherein a drainage slit is formed along the inner peripheral wall of the drainage channel so as to face the ground when the block body is installed.   The retaining wall stacking foundation and drainage block according to claim 3, wherein the drainage slit is widened from an upper end facing the ground to a lower end continuous with the drainage channel.   2. The retaining wall stacking foundation combined drainage block according to claim 1, wherein when the block main body is installed on the inner wall of the drainage channel, a water introduction hole is formed which is exposed to the ground and guides backside spring water.   The drainage block for retaining wall stacking foundation according to claim 1, wherein the drainage channel is formed in a projection plane parallel to the retaining wall stacking foundation wall portion. It has a block body in which a retaining wall stacking base wall portion that is inclined in a direction substantially orthogonal to the installation direction of the retaining wall and a drainage channel provided in the block body, and the block body is installed adjacent to the block body. The step of digging the installation surface of the retaining wall stacking foundation combined drainage block where the retaining wall stacking foundation wall parts and the drainage channels are continuous by being done, and shaping the slope,
Forming a foundation on the installation surface, and installing a plurality of the retaining wall stacking foundation combined drainage blocks adjacent to each other on the foundation so that the retaining wall stacking foundation wall portions and the drainage channels are continuous with each other. When,
And a step of installing a retaining wall on the retaining wall stacking foundation wall portion of the retaining wall stacking foundation combined drainage block.   The roadside structure construction method according to claim 7, wherein the retaining wall is installed with a corner portion engaged with an engaging step formed on the retaining wall stacking base wall.   The roadside structure construction method according to claim 7, wherein the retaining wall stacking drainage block is installed with one end of a drainage slit formed on an inner wall of the drainage channel facing the ground.   The roadside structure construction method according to claim 7, wherein the retaining wall stacking drainage block is installed with a water introduction hole for guiding back spring water formed on an inner wall of the drainage channel facing the ground.   The road drain structure construction method according to claim 7, wherein the drainage channel is formed in a projection plane parallel to the retaining wall stacking base wall. A retaining wall stacking foundation combined drainage block having a block main body formed with a retaining wall stacking foundation wall portion inclined in a direction substantially perpendicular to the installation direction of the retaining wall, and a drainage channel provided in the block main body,
A mounting wall surface having the same inclination angle as the retaining wall stacking base wall portion, and a sediment reservoir having a water guide hole having the same diameter as the drainage channel and on which sediment flowing in from the drainage channel is deposited. With a water catcher,
By installing the block body adjacent to the other block body, the retaining wall stacking foundation wall parts are continuous with each other, and the drainage channels are continuous with each other.
By arranging the water collecting basin adjacent to the block main body, the placement wall surface and the retaining wall stacking base wall portion are continuous with each other, and the water guide hole and the drainage channel are continuous. Roadside structure.   The roadside structure according to claim 12, wherein the earth and sand reservoir is formed up to a position shifted from a flow path of flowing water flowing through the water guide hole.   The roadside structure according to claim 12, wherein a locking step portion for locking the block main body is formed in the catchment.

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