Gently sloping block retaining wall

Abstract

To provide a gentle gradient slope masonry block allowing self-standing and stable stacking to be realized independently even on a gentle gradient slope and capable of coping with the construction of a retaining wall with a height of 5 meters or more as well as allowing construction on a slope where evenly installing back-filling crushed rocks and shaping are difficult.SOLUTION: Gentle gradient slope masonry blocks 1 for forming a retaining wall by being stacked independently on a slope S whose gradient is equal to or more than 10%, each include: a body part 10 where an inclined surface 11 serving as a retaining wall surface is provided on a front part; a frame constitution part 40 which is provided on a rear position of the body part 10; and a plurality of leg parts 21, 22, 23 which connect a rear part of the body part 10 and a front part of the frame constitution part 40. The frame constitution part 40 has: a frame constitution surface 41 which is formed parallel to the inclined surface 11 on the front part; and a lower surface 40b which is formed in the same plane as a lower surface 10b of the body part 10, wherein a cross section orthogonal to a longitudinal direction is formed in a triangle shape or a trapezoidal shape.SELECTED DRAWING: Figure 6

Description

Technical Field

[0001] The present invention relates to a gentle-slope stacking block that stands and stacks on a gentle-slope slope. Gently sloping stacking blocks and stacks independently te form becomes So the gentle-slope stacking block retaining wall related to.

Background Art

[0002] Conventionally, self-standing stacking blocks, that is, stacking blocks that stack independently and are used when forming retaining walls on slopes such as rivers, are known (see Patent Document 1: Japanese Patent Application Laid-Open No. 2003-193452).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] Self-standing stacking blocks can be stacked without constructing a large scaffold, so the workability can be improved. Here, as exemplified in Patent Document 1, self-standing stacking blocks used on steep slopes with an inclination angle of more than 10% (more than 45°) could be realized. On the other hand, self-standing stacking blocks (referred to as "gentle-slope stacking blocks" in the present application) used on gentle slopes with an inclination angle of 10% or more (45° or less) have been difficult to realize due to the following problems. First, the stacking blocks arranged in the upper stage have a problem that their self-standing ability decreases as the number of stages increases, and they fall backward (in particular, construction with a wall height of 5 meters or more has been considered impossible in reality).

[0005] Furthermore, a challenge arose with gently sloping embankments: the crushed stone backfill behind the stacked blocks could not be physically compacted. This was especially true for slopes of 10%, where the crushed stone would collapse and not stay in place. (Needless to say, if it were just soil, compaction would be possible using the bucket attachment of construction machinery, etc.).

[0006] Therefore, conventionally, the only way to construct the stacked blocks was to install support members on the back of the blocks to prevent them from tipping over, place formwork materials (so-called removable formwork, etc.) in a designated position (midway between the front of the backfill crushed stone and the back of the stacked blocks), and then stack the blocks while pouring ready-mix concrete on the front side of the formwork materials and backfill crushed stone on the back side of the formwork materials. In particular, the scaffolding for installing the support members on the back was prone to subsidence, and it was difficult to maintain a constant slope on the front of the stacked blocks, making it an extremely difficult construction method. [Means for solving the problem]

[0007] This invention has been made in view of the above circumstances, and aims to provide a low-slope stacking block that can be independently and stably stacked even on slopes with a gentle gradient (gradient of 10% or more), can be used for the construction of retaining walls with a wall height of 5 meters or more, and can be accurately and easily installed even on slopes where it is difficult to spread and shape the crushed stone backfill.

[0008] The present invention solves the above problem by the following means.

[0009] One embodiment of the gently sloping stacking block is suitable for slopes with a gradient of 10% or more. Gently sloping stacking blocks Independent and built up te form Growth So gently sloping stacking blocks retaining wall And, The aforementioned gently sloping stacked blocks are A main body with an inclined surface that will become a retaining wall at its front, and a formwork component located at the rear of the main body, Formed at the same height as the main body and the formwork componentThe formwork comprises a plurality of legs connecting the rear of the main body and the front of the formwork component, the formwork component having a formwork component surface formed parallel to the inclined surface at the front and a bottom surface formed in the same plane as the bottom surface of the main body, and having a triangular or trapezoidal cross-section perpendicular to the longitudinal direction. The shape is such that the two sides extending upward from both ends of the lower surface are inclined in opposite directions (one of the sides being at a right angle). Formed Furthermore, the leg portion has an upper groove drilled on its upper surface that extends to the left and right sides, and a lower groove drilled on its lower surface that extends to the left and right sides. Multiple of the same shaped gently sloping stacking blocks are stacked vertically along the slope so that the inclined surface becomes a continuous surface. The upper groove and the lower groove are positioned at the same location in the front-to-back direction, and when assembled, they form a connecting hole that allows the backfill concrete to flow through the left and right spaces. The lower surface of the formwork component placed on the upper layer of the stack is placed on the backfill crushed stone on the rear side of the formwork component placed on the lower layer of the stack, thus enabling it to stand on its own. It is characterized by the following.

[0010] According to this method, multiple gently sloping stacking blocks can be stacked vertically on a gently sloping embankment, creating a retaining wall where the inclined surface of the main body becomes the retaining wall surface. In this case, it is also possible to set the vertical height of the stacking to 5 meters or more. Conventionally, it was difficult to realize stacking blocks that could be stacked vertically to a height of 5 meters or more on an embankment with a slope of 10% or more, but this becomes possible.

[0011] Furthermore, it is preferable that pipe installation holes are formed on the sides of the main body and the side of the formwork components, having the same axis and the same inner diameter, and drilled in the front-rear direction. This makes it possible to install pipes of the corresponding outer diameter in the pipe installation holes. Therefore, it becomes possible to discharge stagnant water in the backfill crushed stone on the slope side to the outside of the retaining wall surface by passing it through the pipes.

[0012] Also Furthermore, even if insufficient filling of the core concrete occurs in any of the spaces between the legs, the core concrete can be replenished from the adjacent space through the connecting holes, thus preventing construction defects.

[0013] Furthermore, another embodiment of the gently sloping stacking block is a gently sloping stacking block that can be stacked independently on a slope with a gradient of 10% or more to form a retaining wall, comprising a main body portion having an inclined surface at the front that will become the retaining wall surface, and a first leg portion and a second leg portion extending rearward from the rear of the main body portion, wherein the first leg portion and the second leg portion each have an inner locking portion for locking formwork material to the inner surfaces facing each other.

[0014] According to this method, multiple gently sloping stacking blocks can be stacked vertically on a gently sloping embankment, creating a retaining wall where the inclined surface of the main body becomes the retaining wall surface. In this case, it is also possible to set the vertical height of the stacking to 5 meters or more. Conventionally, it was difficult to realize stacking blocks that could be stacked vertically to a height of 5 meters or more on an embankment with a slope of 10% or more, but this becomes possible.

[0015] Furthermore, it is preferable that the inner locking portion has a locking surface formed at a predetermined distance from the inclined surface and at the same inclination angle as the inclined surface. With this arrangement, by simply locking the formwork material to the inner locking portion of the gently sloping stacking block and sequentially filling the front and back of the formwork material with concrete and crushed stone, it becomes possible to form a retaining wall constructed of vertically stacked sloping blocks with a continuous layer of concrete and a continuous layer of crushed stone with a uniform thickness.

[0016] Furthermore, it is preferable that the first leg and the second leg each have, as inner locking parts, a first inner locking part that is relatively short in distance from the inclined surface and a second inner locking part that is relatively long. This allows the locking position of the formwork material to be set in two ways. Moreover, it becomes easy to realize a configuration that can accommodate the presence or absence of backfill concrete, etc., depending on the wall height and design conditions.

[0017] Furthermore, it is preferable that the first leg portion and the second leg portion each have an outer locking portion on their outer surface facing the opposite direction to the inner surface, having a configuration that is symmetrical to the inner locking portion. This allows the layers of core concrete and backfill crushed stone to be formed between adjacent gently sloping stacking blocks in the same configuration as between the first leg portion and the second leg portion by locking the formwork material to the outer locking portion.

[0018] In addition, when a plurality of the gentle slope stacking blocks are arranged side by side in the left - right direction with a predetermined gap or less so that the inclined surfaces become continuous surfaces, the distance between the outer surface of the first leg portion in one of the adjacent gentle slope stacking blocks and the outer surface of the second leg portion in the other adjacent gentle slope stacking block is configured to be the same as the distance between the inner surface of the first leg portion and the inner surface of the second leg portion in each gentle slope stacking block, and it is preferable that the outer locking portion of the first leg portion in one of the adjacent gentle slope stacking blocks and the outer locking portion of the second leg portion in the other adjacent gentle slope stacking block are configured to be able to lock the formwork material. According to this, since the formwork material locked to the inner locking portion and the formwork material locked to the outer locking portion can be made of the same shape, it is possible to improve the workability and prevent construction defects due to the incompatibility of the formwork material.

[0019] In addition, when a plurality of the gentle slope stacking blocks are stacked in the vertical direction so that the inclined surfaces become continuous surfaces, engaging protrusions and engaging grooves that are engaged with each other to perform a positioning function are provided. It is preferable that the engaging protrusions are arranged on the upper surfaces of the first leg portion and the second leg portion, and the engaging grooves are arranged on the lower surface of the main body portion. According to this, by simply engaging the engaging protrusion of the lower gentle slope stacking block with the engaging groove of the upper gentle slope stacking block, appropriate and simple positioning can be performed so that each inclined surface becomes a continuous surface. Furthermore, by adopting a configuration in which the engaging groove is arranged in the main body portion instead of the first leg portion and the second leg portion, it is possible to prevent a decrease in the strength of the first leg portion and the second leg portion.

[0020] In addition, it is preferable that at least the inclined surface is formed of porous concrete. According to this, it is possible to reduce the brightness of the retaining wall surface and enhance the sound absorption effect, so that a retaining wall excellent in landscape and environmental performance can be realized.

Advantages of the Invention

[0021] According to the present invention, it is possible to achieve a stacked structure that stands alone and is stable even on a gentle slope, i.e., a slope with a gradient of 10% or more. In particular, it is possible to construct a retaining wall with a wall height of 5 meters or more. Furthermore, accurate and easy construction is possible even on a slope where it is difficult to level and shape the backfill gravel.

Brief Description of the Drawings

[0022] [Figure 1] It is a perspective view showing an example of a gentle slope stacked block according to the first embodiment of the present invention. [Figure 2] It is a perspective view showing an example of the gentle slope stacked block of FIG. 1. [Figure 3] It is a perspective view showing an example of the gentle slope stacked block of FIG. 1. [Figure 4] It is a perspective view showing an example of a state where the gentle slope stacked blocks of FIG. 1 are stacked in the vertical direction. [Figure 5] It is an explanatory view (cross-sectional view in side view) showing a configuration example (construction example) when constructing a retaining wall using the gentle slope stacked block of FIG. 1. [Figure 6] It is a perspective view showing an example of a gentle slope stacked block according to the second embodiment of the present invention. [Figure 7] It is a perspective view showing an example of a piping installation hole of the gentle slope stacked block of FIG. 6. [Figure 8] It is an explanatory view (cross-sectional view in side view) showing a configuration example (construction example) when constructing a retaining wall using the gentle slope stacked block of FIG. 6.

Modes for Carrying Out the Invention

[0023] (First Embodiment) The first embodiment of the present invention will be described in detail below with reference to the drawings. Figure 1 is a top side perspective view (schematic diagram) showing an example of a gently sloping stacked block 1 according to this embodiment, Figure 2 is a bottom side perspective view (schematic diagram), and Figure 3 is a rear side perspective view (schematic diagram). Figure 4 is a perspective view showing an example of the gently sloping stacked blocks 1 stacked vertically (formwork materials, backfill concrete, and crushed stone are not shown for clarity of structure). Figure 5 is an explanatory diagram (side cross-sectional view) showing an example of the configuration when constructing a retaining wall using the gently sloping stacked blocks 1. For the sake of explanation, arrows in the figures indicate the front / back, left / right, and up / down directions of the gently sloping stacked block 1. In all figures used to explain each embodiment, the same reference numerals are used for members having the same function, and repeated explanations may be omitted.

[0024] This gently sloping block 1 is designed to be stacked independently on gently sloping (i.e., with a gradient of 10% or more) slopes to form a retaining wall, and is primarily used to protect river slopes. However, its application is not limited to river slopes, and retaining walls also include those that constitute sediment control dams, weirs, embankments, etc.

[0025] As an example of its configuration, the gently sloping stacking block 1 comprises a main body 10 with an inclined surface 11 at its front that serves as a retaining wall, and a roughly rectangular columnar first leg 21 and second leg 22 extending horizontally backward from the rear of the main body 10 (specifically, the back surface 10a). This gently sloping stacking block 1 is made of precast concrete. Reinforcement members such as reinforcing bars are provided inside as needed. The external dimensions of the gently sloping stacking block 1 are not particularly limited, but as an example, it is formed with a height of 250 mm, a width of 2000 mm, and a length of 1000 mm.

[0026] In this embodiment, the inclined surface 11 has a predetermined inclination angle θ with respect to the horizontal lower surface 10b (for example, it is set to match the gradient of the slope S to be constructed) (for example, if the gradient of the slope S is 10%, θ is set to 45°).

[0027] According to this, as shown in Figure 4, multiple gently sloping stacking blocks 1 can be stacked vertically on a gently sloping slope S, enabling the construction of a retaining wall where the inclined surface 11 forms the retaining wall surface. Normally, a foundation concrete F is poured, and then the gently sloping stacking blocks 1 are stacked on top of it.

[0028] Here, when the gently sloping stacking blocks 1 are stacked vertically so that the inclined surface 11 becomes a continuous surface, engaging projections 12 and engaging grooves 13 are provided that engage with each other to perform a positioning function. For example, the engaging projections 12 are located on the upper surface 21c of the first leg portion 21 and the upper surface 22c of the second leg portion 22, and the engaging grooves 13 are located on the lower surface 10b of the main body portion 10.

[0029] According to this configuration, by simply engaging the engaging projection 12 of the lower gently sloping stacking block 1 with the engaging groove 13 of the upper gently sloping stacking block 1, the respective inclined surfaces 11 can be positioned appropriately and easily to become a continuous surface. Furthermore, by arranging the engaging groove 13 in the main body 10 rather than the first leg portion 21 and the second leg portion 22, a reduction in the strength of the first leg portion 21 and the second leg portion 22 can be prevented.

[0030] Furthermore, it is preferable that at least the inclined surface 11 of the gently sloping retaining block 1 is formed of porous concrete. This reduces the brightness of the retaining wall surface and enhances the sound absorption effect, thereby realizing a retaining wall with excellent aesthetic and environmental properties.

[0031] Next, the first leg portion 21 and the second leg portion 22 each have inner locking portions 23 and 24 on their opposing inner surfaces 21a and 22a, respectively, for locking the formwork material P (see Figures 3 and 5). Specifically, the first leg portion 21 has an inner locking portion 23 on its inner surface 21a facing the second leg portion 22. On the other hand, the second leg portion 22 has an inner locking portion 24 on its inner surface 22a facing the first leg portion 21. These inner locking portions 23 and 24 are formed in a shape that is symmetrical in the left-right direction. Note that "formwork material" refers to construction materials formed in a plate shape from resin, wood, etc., and includes both "removable formwork" that is removed after construction and "remaining formwork" that is left in place without being removed after construction (Figure 5 shows the case of remaining formwork).

[0032] As an example, the inner locking portions 23 and 24 have locking surfaces 27 and 28 that are formed at a predetermined distance from the inclined surface 11 and at the same inclination angle as the inclined surface 11. Specifically, the inner locking portion 23 of the first leg portion 21 has a locking surface 27. On the other hand, the inner locking portion 24 of the second leg portion 22 has a locking surface 28. As described above, the locking surfaces 27 and 28 are formed in a shape that is symmetrical in the left-right direction.

[0033] With the above configuration, the formwork material P can be locked to the inner locking parts 23 and 24 of the gently sloping stacking block 1, and the core concrete C can be placed on the front side of the formwork material P, and the backfill crushed stone B can be placed on the rear side. After this process is completed, another gently sloping stacking block 1 is stacked and the same process is performed. By simply repeating this a set number of times, it becomes possible to ultimately form a retaining wall made of gently sloping stacking blocks 1 stacked vertically, as shown in Figure 5, with continuous layers of core concrete C and continuous layers of backfill crushed stone B, each with a uniform thickness.

[0034] Furthermore, the first leg portion 21 and the second leg portion 22 in this embodiment each have inner locking portions 23 and 24, respectively, which are first inner locking portions 23A and 24A that are relatively short from the inclined surface 11, and second inner locking portions 23B and 24B that are relatively long. Specifically, the inner locking portion 23 of the first leg portion 21 has a first inner locking portion 23A that is relatively short from the inclined surface 11 and a second inner locking portion 23B that is relatively long. On the other hand, the inner locking portion 24 of the second leg portion 22 has a first inner locking portion 24A that is relatively short from the inclined surface 11 and a second inner locking portion 24B that is relatively long. This makes it possible to set the locking position of the formwork material in two ways depending on the wall height and design conditions.

[0035] Furthermore, the first leg portion 21 and the second leg portion 22 in this embodiment have outer locking portions 25 and 26 on their outer surfaces 21b and 22b, which are opposite to the inner surfaces 21a and 22a, and are configured to be symmetrical with the inner locking portions 23 and 24 (see Figures 3 and 5). Here, the outer locking portion 25 of the first leg portion 21 has a locking surface 29. On the other hand, the outer locking portion 26 of the second leg portion 22 has a locking surface 30. Specifically, the first leg portion 21 has a first outer locking portion 25A on its outer surface 21b that is symmetrical with the first inner locking portion 23A, and a second outer locking portion 25B that is symmetrical with the second inner locking portion 23B (therefore, it has a locking surface 29A that is symmetrical with the locking surface 27A, and a locking surface 29B that is symmetrical with the locking surface 27B). On the other hand, the second leg portion 22 has a first outer locking portion 26A that is symmetrical to the first inner locking portion 24A, and a second outer locking portion 26B that is symmetrical to the second inner locking portion 24B, on its outer surface 22b (therefore, it has a locking surface 30A that is symmetrical to the locking surface 28A, and a locking surface 30B that is symmetrical to the locking surface 28B).

[0036] Here, when multiple gently sloping stacking blocks 1 are arranged side by side in the left-right direction with a gap of a predetermined dimension or less so that the inclined surface 11 becomes a continuous surface, the formwork material P can be locked by the outer locking portion 25 of the first leg portion 21 of one adjacent gently sloping stacking block 1 and the outer locking portion 26 of the second leg portion 22 of the other adjacent gently sloping stacking block 1.

[0037] According to this, even between adjacent gently sloping stacking blocks 1, layers of core concrete C and backfill crushed stone B can be formed by locking the formwork material P to the outer locking parts 25 and 26. Furthermore, the layers of core concrete C and backfill crushed stone B formed between the first leg portion 21 and the second leg portion 22 of each gently sloping stacking block 1 can be formed with the same configuration (position, thickness).

[0038] Furthermore, in this embodiment, the distance between the outer surface 21b of the first leg portion 21 of one adjacent gently sloping stacking block 1 and the outer surface 22b of the second leg portion 22 of the other adjacent gently sloping stacking block 1 is configured to be the same as the distance between the inner surface 21a of the first leg portion 21 and the inner surface 22a of the second leg portion 22 in each gently sloping stacking block 1 (i.e., to be the same distance).

[0039] According to this, the formwork material P that is locked to the inner locking parts 23 and 24 and the formwork material P that is locked to the outer locking parts 25 and 26 can be made to have the same shape, thereby reducing the cost of the formwork material P, improving workability, and preventing construction defects due to incompatible formwork material P.

[0040] (Second Embodiment) Next, a gently sloping stacking block 1 according to a second embodiment of the present invention will be described. The gently sloping stacking block 1 according to this embodiment is similar to the first embodiment described above in terms of its problems and basic configuration, but has differences, particularly in the configuration that includes the formwork component 40. The following description will focus on these differences. Here, Figure 6 is a perspective view (schematic diagram) showing an example of the configuration of the gently sloping stacking block 1 according to this embodiment.

[0041] The gently sloping stacking block 1 according to this embodiment is provided with a formwork component 40 located at the rear of the main body 10. It also has a plurality of legs connecting the rear (back surface 10a) of the main body 10 and the front (inclined surface 41, described later) of the formwork component 40. As an example, the first leg 6 1.Second leg 62, and the third leg 6 It has three legs. This allows for more compact individual legs compared to a configuration with two legs, while improving the overall strength of the block. However, it is not limited to this configuration, and the number of legs may be two or four or more (not shown).

[0042] The formwork component 40 is the front part (however, the leg part) 6 1. 6 2. 6 The main body 10 is provided with an inclined surface 41 that is formed parallel to the inclined surface 11 (excluding the connection position with 3). This inclined surface 41 constitutes a "formwork constructing surface". In other words, as in the first embodiment described above, the formwork constructing surface 41 can be used as formwork without fixing formwork between the legs, so that the core concrete C can be filled into the spaces 51, 52, 53, and 54 between the legs in this state. Since it is not necessary to prepare and assemble formwork separately, it is possible to reduce costs and improve constructability. As an example, the distance between the inclined surface 11 and the inclined surface 41 is set to 350 mm, but it is not limited to this, and may be set to other dimensions (for example, 450 mm, etc.) depending on the design conditions, etc.

[0043] Furthermore, the formwork component 40 has a lower surface 40b formed in the same plane as the lower surface 10b of the main body 10, and its cross-section perpendicular to the longitudinal direction is formed in a triangular or trapezoidal shape. In both the triangular and trapezoidal cases, the two sides extending upward from both ends of the lower surface 40b in the cross-section are formed in a shape that slopes in opposite directions (including right angles) (the cross-sectional shape of the main body 10 is also the same). This makes it possible to stack multiple gently sloping stacking blocks 1 in a stable and self-supporting manner in the vertical direction (especially up to 5 meters or more) on a slope S with a gentle slope of 10% or more.

[0044] Here, modified examples of the main body 10 and formwork component 40 according to this embodiment are shown in Figure 7 (enlarged view of the side portion). Specifically, as shown in Figure 7(a), the side 10c of the main body 10 and the side 40c of the formwork component 40 are provided with pipe installation holes 42 drilled in the front-rear direction, having the same axis and the same inner diameter. As a result, as shown in Figure 7(b), a pipe T of the corresponding outer diameter can be installed in the pipe installation hole 42. As an example, a circular pipe made of resin (such as polyvinyl chloride) is used for the pipe T. Therefore, as the pipe installation hole 42, the side 10c of one adjacent gently sloping stacking block 1 and the side 10c of the other adjacent gently sloping stacking block 1 are each formed with a semicircular cross-section, and when placed adjacent to each other, they combine to form a circular space. However, the configuration is not limited to this, and a rectangular space may be formed, and a square pipe may be used for the pipe T. Furthermore, the pipe installation hole 42 may be drilled only on the side surface 10c of one adjacent gently sloping stacked block 1 (neither of which is shown in the diagram).

[0045] According to this, when the gently sloping stacked blocks 1 are formed using ordinary concrete, not porous concrete, it becomes possible to discharge the water that has accumulated on the slope S side (for example, the crushed stone B in the backfill) after construction (laying) through the pipe T to the outside (forward) of the retaining wall surface (sloping surface 11).

[0046] As a variation of the pipe installation hole 42, as shown in Figure 7(c), a lid portion 43 having a thickness that can be broken with a hammer or the like may be provided at the foremost position of the side surface 10c of the main body portion 10, for example, by forming concrete integrally with the inclined surface 11. This makes it possible to prevent the pipe installation hole 42 from being exposed on the retaining wall surface (inclined surface 11) when it is not necessary to install a pipe T in the pipe installation hole 42, thus particularly improving the aesthetics.

[0047] Next, the first leg portion according to this embodiment 6 1 is the top surface 6 1c left and right sides 6 1e, 6It is equipped with an upper groove 45a drilled to extend to 1f, and the lower surface 6 1d left and right sides 6 1e, 6 It is equipped with a lower groove 45b drilled to reach 1f. Similarly, the second leg 6 2 is the top surface 6 Side 2c 6 2e, 6 Upper groove 45a extending to 2f, and lower surface 6 2D side 6 2e, 6 It is equipped with a lower groove 45b that extends to the 2f. Also, the third leg 6 3 is the top surface 6 Side 3c 6 3e, 6 Upper groove 45a extending to 3f, and lower surface 6 3D side view 6 3e, 6 It is equipped with a lower groove 45b that extends up to 3f.

[0048] Here, when the gently sloping stacking blocks 1 are stacked vertically so that the inclined surface 11 becomes a continuous surface, the corresponding vertical positions (i.e., the lower first leg) 6 1 and the upper first leg 6 1. Lower second leg 6 2 and the upper second leg 6 2. Lower third leg 6 3 and the upper third leg 6 In 3), the upper groove 45a and the lower groove 45b are arranged to be at the same position in the front-rear direction.

[0049] According to this, in the stacked state described above, the corresponding upper groove 45a and lower groove 45b (i.e., located in the same position) are combined to form a connecting hole 45 that connects the left and right spaces (see construction drawing in Figure 8). Therefore, the filler concrete C placed in each space (51, 52, 53, 54 shown in Figure 6) can be passed through the connecting hole 45 to the adjacent space. In the event that insufficient filler concrete C occurs in any space, filler concrete C can be replenished from the adjacent space via the connecting hole 45, thus preventing construction defects. As shown in Figure 8, a top concrete U may be placed at the very top.

[0050] As explained above, the gently sloping stacking block 1 according to this embodiment allows for self-supporting and stable stacking even on gently sloping slopes S, on its own (i.e., without requiring any auxiliary members other than the gently sloping stacking block 1). In particular, it has an advantage in that it can be used in construction sites with wall heights (vertical heights) of 5 meters or more, which were difficult to handle with conventional self-supporting stacking blocks. The gently sloping stacking block 1 is suitable for use on gently sloping slopes of 10% to 20%, and is even more suitable for gently sloping slopes of 10% to 15%. It can also be used on gently sloping slopes of 20% or more, but the gentler the slope (the greater the slope, the greater the restriction on wall height (the lower the height to which construction is possible)). As a typical example, in the case of a 10% slope, depending on the design conditions, it can be applied without special measures up to a wall height of about 8 meters.

[0051] In addition to the above, since the gently sloping stacking block 1 can be installed by horizontal stacking, constructability and safety are also improved. Furthermore, since it can be installed without requiring specialized skilled workers such as stonemasons, the constraints on construction work are eased.

[0052] Furthermore, even on slopes S where it is difficult to spread and shape the backfill crushed stone B, the backfill crushed stone B can be installed simply by installing the gently sloping stacking blocks 1.

[0053] It should be noted that the present invention is not limited to the embodiments described above, and various modifications are possible without departing from the present invention. Specifically, although the above embodiments were described using river embankments as an example, the invention is not limited to this, and can be similarly applied to coastlines, streams, roads, etc. Furthermore, while it is suitably applicable to gently sloping embankments, it is not impossible to apply it to steeply sloping embankments as well. [Explanation of Symbols]

[0054] 1. Gently sloping stacking blocks 10 Main body 11 Slope 21 Leg (1st leg) 22 Leg (second leg) 23 Leg (3rd leg) 40 Formwork Components 41. Inclined surface (formwork construction surface) 42 Piping installation hole 45 Communication hole 45a Upper groove 45b Lower groove B. Crushed stone backfill C. Filling concrete S slope

Claims

1. A gently sloping retaining wall is formed by stacking gently sloping blocks independently on a slope with a gradient of 10% or more. The aforementioned gently sloping stacked blocks are The main body has a sloping surface at the front that will serve as a retaining wall, A formwork component is provided at the rear position of the main body, It comprises a plurality of legs formed at the same height as the main body and the formwork component, connecting the rear of the main body and the front of the formwork component, The formwork component has a formwork component surface formed parallel to the inclined surface at its front, and a lower surface formed in the same plane as the lower surface of the main body, and is formed such that its cross-section perpendicular to the longitudinal direction is triangular or trapezoidal, and the two sides extending upward from both ends of the lower surface are inclined in opposite directions (one of which is a right angle). The leg portion has an upper groove drilled into its upper surface that extends to the left and right sides, and a lower groove drilled into its lower surface that extends to the left and right sides. Multiple identically shaped gently sloping stacking blocks are stacked vertically along the slope so that the inclined surface becomes a continuous surface. The upper groove and the lower groove are arranged to be at the same position in the front-rear direction, and when combined, they form a connecting hole that connects the left and right spaces and allows the concrete filling to flow through. The lower surface of the formwork component placed on the upper layer of the stack is resting on the crushed stone backfill behind the formwork component placed on the lower layer of the stack, thus enabling it to stand on its own. A gently sloping block retaining wall characterized by the following features.

2. The sides of the main body and the sides of the formwork components are formed with pipe installation holes drilled in the front-rear direction, having the same axis and the same inner diameter. A gently sloping block retaining wall according to claim 1, characterized by the above.

3. The aforementioned plurality of legs shall consist of three legs. A gently sloping block retaining wall according to claim 1, characterized by the above.

4. The vertical height to which items are stacked must be set at 5 meters or more. A gently sloping block retaining wall according to any one of claims 1 to 3, characterized by the above.

5. At least the inclined surface is formed of porous concrete. A gently sloping block retaining wall according to claim 4, characterized by the above.

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