JP2012102596A - Mat with stair-like concrete blocks - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mat with stair-like concrete blocks for which a staircase block is prevented from being shifted downwards.SOLUTION: The mat with the stair-like concrete blocks is for forming a staircase by arranging the staircase blocks with a triangular cross section in the vertical direction on the mat. An upper surface with the triangular cross section forms a roughly horizontal upper surface wall after construction, a bottom surface wall becomes parallel to a base as soon as it is fixed to the mat, the rear end of the bottom surface wall is continued to the rear end of the upper surface wall, and the front end of the upper surface wall and the front end of the bottom surface are respectively continued to the upper and lower ends of a roughly vertical front surface wall after construction. Vertical groove parts in a direction perpendicular to the bottom surface wall and the mat are provided respectively near the lower end of the front surface wall and the rear ends of the upper surface wall and the bottom surface wall, the vertical groove part near the lower end of the front surface wall and the vertical groove part at the rear end of the upper surface wall and the bottom surface wall are provided so as to match at a prescribed position, and a through-hole of such a circle diameter that an anchor pin can be driven is formed.

Description

  The present invention relates to a mat with a concrete block in which a plurality of concrete blocks used for revetment of a lake or a river are laid and fixed to the mat at once, and more particularly to a mat with a concrete block in which stair concrete blocks are arranged.

Recently, mats with many concrete blocks laid on the revetment of lakes and rivers are often used due to the advantages such as ease of implementation and completion of construction in a short time.
A conventional mat with a concrete block is a water-permeable non-woven mat made of polypropylene fiber, polyester fiber or polystyrene fiber, or a water-permeable non-woven fabric obtained by combining these, as disclosed in Patent Documents 1 to 5 by the present inventor. With a concrete pseudo-stone block that spreads a mat and applies an adhesive (for example, epoxy resin adhesive) to the bottom of a concrete block such as a plurality of pseudo-stones. A mat is provided.
These concrete blocks can be made at once in the same arrangement as the construction, and the water-permeable nonwoven mat made of synthetic resin fiber allows water to enter and exit between the blocks so that plants can be nurtured and revetment Can promote greening.

  The mats with concrete pseudo-stone blocks of Patent Documents 1 to 4 described above are not suitable for fish, aquatic animals and the like to live on the revetment because there are almost no layers of soil or the like. In addition, when the top surface of the concrete block is almost flat, it becomes a slope, so when a person stands on the revetment, it is slippery and it is dangerous for children to descend to the water surface.

  Therefore, the present inventor provides a mat with a concrete block suitable for a natural environment having a fish nest in which fish, aquatic animals and the like live in Patent Document 6, and further, a staircase having a large horizontal plane area even when constructed. It proposes a mat with a block in which a concrete block is placed.

JP 2004-255765 A JP 2006-112156 A JP 2007-231526 A JP 2008-265172 A Japanese Patent No. 3980616 Japanese Patent Application No. 2009-136394

By the way, although the staircase concrete block on the mat is firmly fixed to the mat, it moves downward by its own weight or when a person gets on or off the staircase, it moves downward by its load or vibration. There was something to do.
The present invention has been made in view of such inconveniences, and even if a stair block in a mat with a stair-like concrete block is heavy, it does not shift downward, and when a person gets on and off the top wall of the stair block, Even if a heavy object such as a fish nest block is loaded on the block, it is a mat with a staircase concrete block that prevents it from shifting downward due to vibration and load, and it is easy to remove the concrete of the stair block An object is to provide an easy mat with stepped concrete blocks.

In order to solve the above-mentioned problem, the invention of claim 1 is a mat with a stepped concrete block that forms a stair by arranging stepped blocks having a triangular cross section in the vertical direction on the mat,
The upper surface of the triangular cross section forms a substantially horizontal upper surface wall after construction, the bottom wall is fixed to the mat and at the same time parallel to the base, the rear end of the bottom wall is connected to the rear end of the upper surface wall, The front end of the wall and the front end of the bottom wall are respectively connected to the upper and lower ends of the front wall that is almost vertical after enforcement,
Near the lower end of the front wall, and at the rear end of the top wall and the bottom wall, a vertical groove portion perpendicular to the bottom wall and the mat is provided, respectively, and the vertical groove portion and the upper surface near the lower end (lower end portion) of the front wall. It is characterized in that a circular through hole Y into which an anchor pin can be driven is formed by being provided so as to coincide with a vertical groove portion at the rear end of the wall and the bottom wall.
According to a second aspect of the present invention, in the mat with a stepped concrete block according to the first aspect, the longitudinal groove portion in the vicinity of the lower end of the front wall is tapered so that the diameter increases upward.
According to a third aspect of the present invention, in the mat with the stepped concrete block according to the first or second aspect, the pair of through holes Y are provided in the front wall, and the gate-shaped anchor pins are driven into the mat and the base to lower the step block. It is characterized by stopping.

As described above, according to the present invention, in the mat with a stepped concrete block, the anchor pin is driven into the lower end portion of the front wall of the stair block, and the upper end portion of the anchor pin is set to the lower end portion 231 of the front wall of the stair block. Since the mat is penetrated with anchor pins, the mat itself is firmly fixed to the base, so that even if the concrete stair block is heavy, the top wall of the stair block does not slip down. Even when a person gets on or off the board, or when a heavy object such as a fish nest block is loaded on the stair block, the vibration or load does not shift downward, and it can withstand long-term use.
In addition, the vertical groove and the through hole for anchor pins are at right angles to the bottom surface, so it is easy to remove the concrete from the formwork to the stair block, and after fixing the stair block together with the mat from the form frame together with the stair block Deformation is possible, and if the vertical groove near the lower end (lower end) of the front wall is tapered so that the diameter increases upward, the demolding can be further facilitated. It is also easy to produce mats with stepped concrete blocks.

BRIEF DESCRIPTION OF THE DRAWINGS It is a general view of the mat with a concrete block of the Example of this invention, FIG. 1 (a) is a top view, FIG.1 (b) is a left view, FIG.1 (c) is a front view, An explanatory diagram of a state in which a plurality of mats with concrete blocks in FIG. FIG. 3 (a) is a left side view, FIG. 3 (b) is a plan view, and FIG. 3 (c) is a plan view from above. A side sectional view of a state in which a wide stair block 2 is fixed to a mat 1 and fixed to a base (seawall) G with an anchor pin 28 during construction. FIG. 5 (a) is an external view of the anchor-shaped anchor pin. FIG. 5 (a) is a view showing an exterior view of the gate-shaped anchor pin. Side sectional view of the FIG. 6 (a) is a plan view from above, FIG. 6 (b) is a side view, and FIG. It is a longitudinal cross-sectional view of the state where the flat block 4 and the lid block 6 are spanned over the stair blocks 2 and 3, and the narrow stair block 3 and the flat block 4 are fixed with anchor pins. FIG. 8A is a plan view from above, and FIG. 8B is a cross-sectional view taken along line (b)-(b) in FIG. 8A. FIG. 6 is a front view of the lid-like block 6. FIG. 10A is a bottom view, and FIG. 10B is a rear view from the rear end, illustrating the hollow portion Z1 of the lid-like block 6. It is a front view of the state where the flat block 4 and the lid-like block 6 were spanned over the stair blocks 2 and 3. FIG. 3 is a perspective front view of a state where a lid-like block 6 is spanned over the stairs blocks 2 and 3.

  The most characteristic feature of the present invention is a mat with a concrete block in which stair blocks having a triangular cross section are arranged in a column, and the anchor pin is driven into the lower end portion of the front wall of the stair block to prevent slipping. It also fixes itself.

Hereinafter, an embodiment of a mat with a staircase concrete block provided with a fish nest block using a wide and narrow cross-sectional staircase block of the present invention will be described with reference to the drawings.
FIG. 1 is an overall view of a mat with a concrete block including a fish nest block according to the present invention. FIG. 1 (a) is a plan view, (b) is a left side view, and (c) is a front view.
As shown in FIG. 1A, the mat 1 usually has a width of 1.9 m and an area of 6.665 m, and the mat material of this embodiment is a water-permeable nonwoven mat of synthetic resin fibers. As the fiber, the upper surface in contact with the concrete block is a non-woven fabric of polypropylene fiber that is resistant to alkali chemical reaction such as cement material, and a bundle of polypropylene or polyester filaments is twisted for reinforcement in the vertical or horizontal direction at intervals. A built-in rope.

The mat 1 has an overall average thickness of 3 mm or more, and the entire concrete pseudo-stone block per mat in this embodiment is 1.3 tons, so it can withstand this when the mat 1 is lifted during construction. It must have strength, the tensile strength in the machine direction is 2.94 kgf / 5 cm, and the tensile elongation is 15% or less. Water permeability having a physical property value of 1 × 10 ⁻² cm / sec was used.
In addition, the water-permeable type is the one in which the concrete blocks 2 to 5 are arranged on the surface with pseudo stones that match the natural scenery, allowing water and air to enter and exit through the mat 1 and between the mats 1 on the revetment. This is because plants can grow and promote greening. Further, a through hole may be artificially provided at a proper position of the mat 1 with a punch or the like so that water and air can enter and exit.
Moreover, as another example, a nonwoven fabric made of a blend of polypropylene fiber and polyester fiber, or a composite nonwoven fabric in which polypropylene fiber is arranged on the upper surface side at the time of enforcement and a strong polyester fiber is arranged on the lower side. May be used.

On this mat 1, a wide stair block 2 having a substantially triangular cross section is arranged in two rows in the center, and a narrow stair block 3 having a substantially triangular cross section is arranged in one row on both sides. Are arranged in succession.
The step blocks 2 and 3 have the same cross-sectional shape, but the width of the left and right sides of the center step block 2 is 30 cm, whereas the step blocks 3 on both sides of the block assembly X are half the width. The width is 15 cm. Further, a 15 cm square flat plate block 4 is continuously laid in the vertical direction between the stairs blocks 2 and 3 having a triangular cross section, and the mat block adjacent to the outside of the stairs block 3 is fitted. As shown, the connection block 5 is arranged. In addition, the surface of each block is an artificial stone made of concrete that imitates natural stone with an irregular pattern.
Thus, the work of arranging individual blocks on site is troublesome, but the work with mats with collective blocks as in this embodiment can be done by fixing unit mats side by side, and the work efficiency is Dramatically improved, there is little deterioration of the mat, strength is maintained for many years, and durability is dramatically improved.

As shown in FIG. 1, a pair of triangular stepwise wide stair blocks 2 and a narrow stair block 3 on both sides are arranged in parallel in the vertical direction on the mat 1 at a predetermined interval. A flat unit block 1 having a low height is disposed between the stair blocks, and further, a unit mat 1 is formed by arranging connection blocks 5 at both ends. As shown in FIG. Overlapping the ends of the construction.
In FIG. 2, the construction method will be described. A plurality of various concrete blocks 2 to 5 are collectively loaded for each mat 1, loaded onto a transport vehicle with a crane, transported to the site, and then first mated with a crane or the like. 1. Grasp both gripping parts A and B without a block with a gripping tool (not shown) provided in the crane, and lay the mat 1 directly on the revetment at the construction site as shown in FIG. The holding parts A and B are fixed to the bank E side and the river F side. Further, when the next mat 1 is laid down, the joining block 5 of the joining portion D having no gripping portion is placed on the gripping portion C of the right end portion of the mat 1 that has already been constructed. Lay down close to 5.

After that, it is sufficient to leave the next mat 1 just by laying down directly, and the joint portion of the two mats 1 is mixed into the joint block 5 having a complicated outer shape so that the joint portion is not noticeable. A revetment that matches the natural environment is formed.
Of course, what is necessary is just to change suitably the magnitude | size of the mat 1, the shape and magnitude | size of a holding part according to the condition of a construction site.
In this way, unlike the case of using a conventional simple shaped block, by using the mat of the present embodiment, it naturally blends in and harmonizes with the surrounding landscape, and there is no straight line in the joining line that becomes a groove, etc. Therefore, it is possible to prevent the soil from being washed away, and even if the adjacent mats are slightly displaced, they do not stand out.
As shown in FIG. 11, which will be described later, while covering the mat 1 in this manner, a lid-like block 6 serving as a fish nest block is formed on the horizontal upper surface of the stepped blocks 2 and 3 having a triangular cross section arranged at a predetermined interval. And the fixing rod 68 is inserted and fixed in the through holes 66 and 67, and itself forms a staircase. Then, as will be described later, a space that is continuous in the vertical direction is formed from the hollow portion Z1 of the lid-like block and the flat plate block, and fish enters and leaves part of the front wall and the top wall of the lid-like block 6. Cutout portions 64 and 65 are provided to form a fish nest block.

Each block will be described in detail below.
Except for the lid-like block 6, various concrete blocks 2 to 5 made of concrete are collectively manufactured on the mat 1 as disclosed in the above-mentioned patent document.
[Stair Block 2 (3)]
First, a wide stair block 2 arranged in two rows in the center in the vertical direction will be described with reference to FIG.
As shown in FIG. 3 (a), in the construction in which the slope angle α of the bottom wall 21 is approximately 20 degrees after construction and the slope angle α of the revetment is 20 degrees, the top wall 22 is constructed. Is a square of approximately 30 cm in a horizontal plane, the front wall 23 is substantially vertical and has a width of 30 cm, a height (h) of about 15 cm, and the rear end of the front wall 22 is a back surface having a height (h1) of about 1 to 2 cm. Wall 25. The left and right side wall surfaces 24 have a right triangle shape, and the top wall 22, the front wall 23, the side wall 24, and the back wall 25 have a pseudo stone pattern imitating natural stone. A fixing hole 221 for inserting a fixing rod 68 corresponding to the through-holes 66 and 67 of the lid-like block 6 of the upper surface wall 22 is provided, and this fixing hole 221 is created by a drill or the like after demolding.
The upper surface of the staircase block 2 having a triangular cross section forms a substantially horizontal upper surface wall 22 after construction, and the bottom wall 21 is fixed to the mat and at the same time parallel to a base G such as a seawall. The rear end of the bottom wall 21 is connected to the rear end of the top wall 22, and the front end of the top wall 22 and the front end of the bottom wall 21 are connected to the upper and lower ends of the substantially vertical front wall 23 after the operation.

Here, the structure of the anti-slip of the staircase block 2.3 which is a characteristic part of the present invention will be described.
3 (a) and 3 (b), a pair of vertical groove portions 26 are provided near the lower end of the front wall 23 in a direction perpendicular to the bottom wall 21 and the mat 1 (the revetment surface). has α. In addition, a pair of vertical groove portions 27 perpendicular to the bottom wall 21 and the mat 1 are also provided on the rear wall 25 at the rear end of the top wall 22 and the bottom wall 21.
As shown in FIG. 3 (c), the longitudinal groove portion 26 in the vicinity of the lower end of the front wall 23 and the longitudinal groove portion 27 with the back wall 25 of the adjacent stair block 2 are provided so as to coincide with each other at a predetermined position. Is formed, a circular through hole Y into which the anchor pin 28 (29) (see FIGS. 4 and 5) can be driven is formed. As shown in FIG. 3 (b), the longitudinal groove portion 26 near the lower end of the front wall 23 is tapered such that the diameter increases upward, but is indicated by a two-dot chain line in FIG. 3 (a). This is because when the mold is pulled out in the arrow direction P, it can be easily removed.

As shown in FIG. 4, at the construction site, a pair of anchor-shaped anchor pins 28 having a length of about 60 cm as shown in FIG. 5 (a) are formed in the through holes Y formed of the longitudinal groove portions 26, 27. The anchor pin 28 is made of iron or stainless steel having a thickness of 13 to 16 mm. Even if the pin portion 282 of the anchor pin 28 is driven into the mat 1 and the base G, the pair of through holes Y Since the connecting portion 281 corresponding to the distance of the pin always protrudes from the mat 1 with a pin thickness of 13 to 16 mm, the connecting portion 281 of the head is mainly the lower end 231 of the front wall 23 of the stair block 2.3. Is locked with a predetermined width to prevent the stair block 2.3 from sliding down. Moreover, since the front-end | tip part of the pin part 282 latches in the vertical groove parts 28 and 27, and the horizontal movement of a horizontal direction is prevented, the stair block 2.3 is fixed more firmly with respect to the mat | matte 1 and a base | substrate. At this time, since the mat 1 is also fixed to the base (revetment) by the anchor pins 28, the stair block 2.3 itself fixed to the mat 1 is also firmly fixed.
The anchor pin 28 used in the present embodiment has a gate shape. However, in the case where the base G is a hard rock, both of the gate-shaped pins may not be driven. In this case, FIG. 1 is used to prevent the head 291 from being shifted downward and to the left and right by being locked to the lower end 231 of the stair block 2.3. In addition, although the service life in the case of an iron anchor pin is about 50 years, the stair block 2.3 can also be prevented from moving even if the anchor pin decays because the seat block 2.3 is seated stably for many years. Of course, if it is desired to make the service life longer, a stainless steel anchor pin may be used, and the service life in this case is 100 years. Moreover, what is necessary is just to give mortar mortar etc. to the joint part between each block.
Stairs can be formed only with the wide stair block 2 or the narrow stair block 3 described later.
In this embodiment, the bottom wall 21 has an inclined surface with an inclination angle α of approximately 20 degrees, but of course, the inclination angle may be changed as appropriate according to the construction site. 3 may be designed so that the top wall 22 of the three is substantially horizontal.
The narrow stair blocks 3 arranged on both sides of the block aggregate X on the mat 1 are the same except that they are about half the width of the wide stair block 2. The reason why the narrow stair blocks 3 are arranged on both sides of the block aggregate X is to make the height h of the entire surface of the mat 1 the same when the mats 1 are stacked and transported.

[Narrow stairs block 3, flat block 4]
As shown in FIGS. 1 and 6, a flat plate block 4 having a low side wall 41 is laid between the step blocks 2 and 3. In this embodiment, as shown in FIG. 6A, the top wall 42 is a 15 cm square and flat. However, since it is only necessary to spread between the stairs blocks 2 and 3, it is not necessarily a square and the number is not limited. If the height of the flat plate 4 is lowered, the space continuous in the up-down direction constituted by the cavity portion Z1 of the lid-like block 6 and the flat plate block 4 to be described later can be enlarged.
Here, the narrow stair block 3 is the same as the wide stair block 2 except that the width of the front wall 23 is narrow. Only one vertical groove portion 26 is provided, and only one vertical groove portion 27 at the rear end of the top wall 22 is provided. Therefore, in the case of the narrow staircase block 3, as shown in FIG. 6, the corner space 43 in one corner in the four corners of the flat plate block 4 is used as a through hole Y of one pin portion 282 of the gate-shaped anchor pin 28. The position of the through hole Y formed by the vertical groove portion 26 and the vertical groove portion 27 of the stair block 3 may be set to a position that matches the connecting portion 281 of the anchor pin 28. In this way, only the same anchor pin 28 needs to be prepared.
Thus, as shown in FIGS. 6 and 7, as in the case of the wide stair block 2, the pin thickness portion 13 to 16 mm always protrudes from the mat 1 at the connecting portion 281. The lower end 231 of the front wall 23 of the stair block 3 is locked with a predetermined width to prevent the stair block 2.3 from sliding down.

[Joint block 5]
A connection block 5 is arranged outside the staircase block 3 so as to be fitted with an adjacent mat block, and the outer shape of the connection block 5 is intimately joined as shown in FIG. The mat 1 is prevented from being exposed.
Furthermore, the joint part of this joint block 5 has a complicated external shape, and the seam that matches the natural environment as a whole is formed so that the joint part is not conspicuous.
As shown in FIG. 1 (a), the upper and lower ends of the block assembly X are also joined blocks when the mat 1 is laid in the vertical direction. Similar to 5, the joint portion has a complicated outer shape, and the revetment that matches the natural environment as a whole is formed such that the joint portion is not conspicuous.

[Production method of blocks 2 to 5]
The blocks 2 to 5 described above are collectively molded with a mold, but the outer frame of the rectangular mold is made of FRP resin, and the pseudo stone mold forming the inner pseudo stone is made of polyurethane resin, as shown in FIG. First, cement is placed on the formwork, and concrete blocks are created all at once.
In this formwork, the bottom surface of the block 2 is exposed upward, and when the concrete is solidified, resin mortar (polymer cement) as an adhesive material is applied to the bottom of all the blocks 2 to 5 with a mortar gun. .

As the adhesive material used in this example, resin mortar (polymer cement) having the composition shown in Table 1 below was effective from the viewpoint of strength, environmental measures, and mat deterioration prevention.

[Table 1] Composition of resin mortar Sand (35-50) 40% by weight
2. Cement (35-50) 40% by weight
3. Vinyl acetate (15-40) 20% by weight

Subtotal 100% by weight

4). Water appropriate amount (same weight as sand + cement)

In order to block ultraviolet rays, the resin mortar layer must be thickened to some extent (0.3 to 1.5 mm), but sand is an extender for that purpose. If the amount is too large, the amount of cement and vinyl acetate will be relatively small, resulting in insufficient strength. If the amount is too small, the amount of cement and vinyl acetate will be increased and the cost will be high. is there. In addition, if the amount of cement is too much, the amount of vinyl acetate is relatively reduced, and the function of neutralizing and blocking the alkaline component exuding from the concrete is reduced. If the amount is too small, the strength is insufficient, so about 35 to 50% by weight. Good, preferably 40% by weight.
Furthermore, it is important to use vinyl acetate, but particularly, since the vinyl acetate resin layer is formed together with sand and cement, the ultraviolet ray R is effectively blocked, but if there is too much vinyl acetate, In addition to high costs, it is necessary to generate cracks for water in and out during transportation and enforcement work, but it is difficult to generate cracks, and it is also difficult to create water holes when punching. Become. On the other hand, if the amount of vinyl acetate is too small, the function of blocking the ultraviolet ray R is lowered, and the function of neutralizing and blocking the alkali component is also lowered. Therefore, the amount is preferably about 15 to 40% by weight, preferably 20% by weight. It is. Although vinyl acetate may be about 60% by weight, it is expensive and wasteful, and the above-mentioned composition ratio is appropriate.
Further, water is mixed to such an extent that it has an appropriate viscosity, but generally (this example), it is preferable to add a weight equivalent to the combined weight of the added sand and cement.
In addition, in the composition of the resin mortar, when it takes time to harden the cement of the concrete block, such as in winter, 2 to 6% by weight of calcium chloride as a cement hardening accelerator may be mixed as necessary. Well, in this case, the adhesion is completed early, and the product demolding time can be advanced.

  The adhesive material with resin mortar is applied to the mold and the bottom of the blocks 2 to 5 together with a mortar gun. When concrete is poured, the bottom of the blocks 2 to 5 is the upper surface of the mold. The resin mortar is applied to the bottom surface of the exposed block and fixed to the mat 1 on the blocks 2 to 5, and the non-woven mat 1 is spread while pressing against the upper surface of the mold. As a result, the locks 2 to 5 and the mat 1 are bonded and fixed by an adhesive material of resin mortar, and when the curing is completed, the blocks 2 to 5 and the mat 1 are firmly integrated with a concrete pseudo stone block. The mat 1 is removed from the mold.

[Lid block 6]
As shown in FIGS. 11 and 12, the lid-like block 6 hangs over the horizontal upper surface of the staircase blocks 2 and 3, and is manufactured in a mold separate from the blocks 2 to 5. As shown in FIG. 10, it is a planar rectangle and has a substantially constant height.
As shown in FIG. 8 (a), the upper surface wall 61 of the lid-like block 6 is an irregular pseudo-stone that is rectangular and imitates natural stone, but forms a stepping stone for a staircase in a substantially flat surface. The height h2 of the front wall 62 of the lid-like block 6 and the side walls 63 on both sides is the difference between the height (h1) of the front wall 23 (h) and the back wall 25 of the stair blocks 2 and 3 (h−h1 = h2). ). In addition, a hollow portion Z1 is formed in which the bottom of the inside of the lid-like block 6 is eliminated and a ceiling portion 69 is provided to form a cavity.
Then, a continuous space passage Z3 (see FIG. 7) is formed in the interior of the lid-like block 6 so as to continue in the vertical direction between the cavity Z1 and the space Z2 on the flat plate block 4, and the upper surface wall 61 of the lid-like block 6 A notch 64 through which fish enters and exits is provided at the center of the rear end, and a notch 65 through which fish enters and exits is also provided at the center of the lower end of the front wall 62 of the lid-like block 6, as shown in FIG. When the lid-like blocks 6 are stacked on the top and bottom, the cutout portion 64 and the cutout portion 65 form a continuous hole, and a hole through which fish enters and exits is formed.
Further, the upper surface wall 61 near the side wall 63 on both sides of the lid block 6 is provided with through holes 66 and 67 penetrating in the vertical direction, and the upper surface wall 22 of the stair blocks 2 and 3 is provided with the through holes 66 and 67. Fixing holes 221 (see FIG. 3) are provided at corresponding positions, and fixing rods 68 are inserted into the through holes 66 and 67 and the fixing holes 221 to fix the lid-like block 6. In order to further strengthen the fixing between the stair blocks 2 and 3 and the lid-like block 6, an adhesive or concrete is inserted into the holes and hardened.

[Fish nest function / stair function]
As described above, the mat 1 is constructed on the target revetment, and the construction in which the lid-like block 6 serving as the fish nest block is stretched over the horizontal upper surface wall of the pair of stair blocks 2 and 3 is completed, The function / action of the mat with a concrete block provided with the fish nest block in the state shown in FIG. 2 will be described.
The fish nest function and the staircase function will be described with reference to FIGS. 7, 11, and 12, which are enlarged views of the portion centering on the lid-like block 6 in the state of FIG. 2. As shown in FIG. 11, the horizontal upper surface wall 22 of one pair of the wide stair blocks 2 in the middle two rows and the pair of stair blocks 2 and 3 of the narrow stair block 3 on the side of the block assembly X. A lid-like block 6 serving as a fish nest block is hung on the flat plate block 4 to form a space Z2. In this case, since the lid-like block 6 also has neither a bottom surface nor a back surface, as shown in FIG. 7, the ceiling and the back of the stair blocks 2 and 3 are large in the vertical direction in which the cavity portion Z1 of the lid-like block 6 and the space portion Z2 are large. A continuous space passage Z3 is formed.
On the other hand, when the lid-like blocks 6 are stacked up and down, a hole in which the notch 64 and the notch 65 are continuous is formed, and the continuous space passage Z3 communicates with the outside in some places.
Accordingly, lake water and river water can freely enter and leave the cavity Z1 and space Z2 of the continuous space passage Z3 through the notch 64 and the notch 65, and of course, fish and aquatic Animals can also go in and out.

Further, since the staircase blocks 2 and 3 are continuously arranged in the vertical direction, the upper surface walls 22 and 42 are substantially horizontal although they have a pseudo stone pattern unevenness to form a staircase. Furthermore, since the lid-like block 6 is also laminated on the staircase blocks 2 and 3 one by one, a staircase is formed. Since the notched portion 64 of the lid-like block 6 is provided at the rear end of the upper surface wall 61 and the notched portion 65 is provided at the lower end of the front wall 62, it is unlikely that a person will be caught on the toes, and the staircase function may be hindered. It will not be.
By having this staircase function, it is less slippery than the conventional mat-type collective concrete block, the child can go down to the water surface and observe the water, and it becomes easy to get used to it naturally.
Further, since the notch 64 and the notch 65 are arranged for each floor in the lid-like block 6, even if the water level of the lake water or the river fluctuates, the continuous space passage Z3 is changed according to the fluctuating water level. The water level inside also fluctuates. For this reason, since the cavity part Z1 and the space part Z2 of this continuous space channel | path Z3 become the perfect fish nest for a fish, and become a habitat for aquatic animals, it becomes possible to form an environment rich in nature.

As described above, the mat with a staircase concrete block according to the embodiment of the present invention drives the anchor pin 28 into the lower end portion 231 of the front wall of the staircase block 2.3 so that the anchor pin 28 has a wide portion at the upper end portion. Since a certain connecting portion 281 is locked to the lower end portion 231 of the front wall 23 of the stair block to prevent slipping, it has a blocking function in surface contact, and the strength and durability are increased, and the vertical groove portion Since the tip of the pin portion 282 is engaged with the pins 28 and 27 to prevent horizontal movement in the horizontal direction, the step block 2.3 is more firmly fixed to the mat 1 and the base. Further, since the mat 1 is penetrated by the anchor pin 28, the mat 1 itself is also firmly fixed to the base G, so that even if the concrete stair block 2.3 is heavy, it does not shift downward, and the top surface of the stair block 2.3. Even when a person gets on or off the wall 22 or when a heavy object such as a fish nest block 6 is loaded on the stair block 2.3, it does not shift downward due to the vibration and load, and has sufficient strength and durability. It can also withstand long-term use.
Further, since the vertical groove portions 26 and 27 and the through hole Y for the anchor pin 28 (29) are perpendicular to the bottom surface, it is easy to remove the stair block 2.3 from the mold, and after fixing the stair block, the mold The stairs block 2.3 can be removed from the frame together with the mat 1, and if the longitudinal groove 26 of the lower end 231 of the front wall 23 is tapered such that the diameter increases upward, further demolding is performed. This makes it easy to produce mats with stepped concrete blocks in large areas.
In addition, it can be equipped with a fish nest block that can be easily installed on a concrete revetment, has a fish nest where fish and aquatic animals live, and is suitable for the natural environment where many fish and aquatic animals can live on the waterside. Since it is a mat with a pseudo-stone block, and since a stepped block is arranged, it can be made a stepped concrete block with a large horizontal surface after construction, so it is harder to slide than before, children descend to the surface of the water, Can be observed.
Needless to say, the present invention is not limited to the above-described embodiment as long as the features of the present invention are not impaired.

A, B, C ... Gripping part, D ... Joint part, E ...
F ・ ・ River, G ・ ・ Base (Revetment), X ・ ・ Block aggregate,
Y ... through hole,
Z1, ... hollow part, Z2, ... space part, Z3 ... continuous space passage,
1. Matte
2. Wide stair block,
21 .. Bottom wall, 22 .. Top wall, 221 .. Fixing hole, 23 .. Front wall,
24 ... Side wall, 25 ... Back wall, 26,27 ... Vertical groove,
28 ・ ・ Portal anchor pin, 281 ・ ・ Connection part (head), 282 ・ ・ Pin part,
29 ・ ・ Nail-shaped anchor pin, 291 ・ ・ Head 3 ・ ・ Narrow staircase block,
4 .. Flat block, 41 .. Side wall, 42 .. Upper wall, 43 .. Corner space,
5. ・ Connection block 6 ・ ・ Lid block, 61 ・ ・ Top wall, 62 ・ ・ Front wall,
63 ・ ・ Side wall, 64,65 ・ ・ Notch,
66,67 ... through holes, 68 ... fixing rods, 69 ... ceiling parts,
h ・ ・ Height of the front wall of the stair block, h1 ・ ・ Height of the back wall of the stair block
h2 ・ ・ Height of lid block

Claims (3)

A mat with a staircase-like concrete block that forms staircases by arranging staircase blocks with a triangular cross-section in the vertical direction on the mat,
The upper surface of the triangular cross section forms a substantially horizontal upper surface wall after construction, the bottom wall is fixed to the mat and at the same time parallel to the base, the rear end of the bottom wall is connected to the rear end of the upper surface wall, The front edge of the wall and the front edge of the bottom surface are connected to the upper and lower ends of the almost vertical front wall after the operation,
Near the lower end of the front wall, and at the rear end of the top wall and the bottom wall, vertical groove portions perpendicular to the bottom wall and the mat are respectively provided, and the vertical groove portions near the lower end of the front wall, the top wall and the bottom wall A mat with a stepped concrete block, which is provided so as to coincide with a longitudinal groove portion with a rear end at a predetermined position so as to form a circular through hole into which an anchor pin can be driven.   The mat with a staircase-like concrete block according to claim 1, wherein the longitudinal groove portion in the vicinity of the lower end of the front wall is tapered such that the diameter increases upward.   The mat with a staircase-like concrete block according to claim 1 or 2, wherein a pair of the through holes are provided in the front wall, and a portal anchor pin is driven into the mat and the base to stop the descent of the stair block.

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