JPH0748744Y2 - Step block for seawall - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a staircase block for revetment, which is mainly used when constructing a curved portion.

(Prior Art) A conventional block used for a staircase revetment method generally has a deformed shape or a square shape with an opening for filling with glystone or the like in the center, and an engagement relationship or a connection depending on the outer shape. By connecting each other with metal fittings, they are constructed in a stepwise manner in the longitudinal direction. However, in such a block, the connection between the blocks becomes insufficient, or in order to prevent dissipation due to wave force, the block becomes heavy and the kicking height becomes high or only a steep slope can be stacked.

In order to eliminate such an inconvenience, the applicant has disclosed that
-75209 proposed a stair type block as shown in the gazette.

This block is provided with a step on the upper surface of the block main body in the front-rear direction, which divides the block main body into a front lower part and a rear high part, and the stepped part constitutes a riser portion of the stairs. Further, when the wing portions are formed to project on both sides of the front lower portion and the rear high portion, respectively, and when the blocks adjacent to each other in the lateral direction are arranged so that their wing tip portions abut each other, While the block is prevented from shifting in the front-rear direction by a filling material such as green stone filled in a space portion surrounded by both wings and the side surface of the block body and an engagement surface formed on the tip end surface of the wings, , The fitting relationship between the concave portion formed on the front surface of the block body and the protrusion provided on the rear surface of the block body, and the filling material in the space described above restrict the shift movement of the block in the left-right direction, It has a high connection effect.

(Problems to be solved by the invention) By the way, in curved rivers and coasts, it is necessary to subtly bend and construct revetment blocks in order to protect the natural landscape.

However, although the proposed blocks mentioned above can easily be applied to the protection of straight rivers and coasts, if they are piled up in curved sections, a large gap will be created between blocks that are laterally adjacent to each other. Not only will it not comply with the standards, but it will also result in problems such as the suction of sediment.

On the other hand, if the proposed block is constructed with a block of relatively small weight, it can be applied to curved sections to some extent, but the number of blocks to be constructed will become huge, and there will be problems in terms of construction period and manpower. Occurs.

The present invention has been made in view of the above points to be improved,
The purpose is to construct a curved revetment that can be constructed in a staircase shape that does not hinder people going up and down, is surely interconnected, and is a block that does not suck out sediment. The purpose is to provide a staircase block for revetment.

(Means for Solving the Problems) In order to achieve the above-mentioned object, the revetment block of the present invention divides the block main body into a front lower part and a rear high part by providing a step in the front-back direction on the top surface of the block main body. The front wings are formed on the front parts of both sides of the front lower part, and the rear wings are formed on the front parts of both sides of the rear high part so that the blocks adjacent to each other in the lateral direction are adjacent to each other. When arranged so that they are butted against each other, the above-mentioned front wing portion, rear wing portion, and side surface of the block main body form a space portion for filling with stones, etc. In the block, the protrusion length of one of the front wing and the rear wing is formed to be longer than the protrusion of the other wing, and extends in the left-right direction on the rear surface of the block main body, and Shaped recess with both ends open To one, in front of the block body, it is provided with a projection to be engaged with the recess of the block main body in which is movable in the lateral direction state.

The protrusion lengths of the front wing portion and the rear wing portion may be equal.

(Operation) When the revetment block according to the present invention is arranged on a predetermined slope in a grid pattern so that each wing portion abuts a corresponding wing portion of a laterally adjacent block, for example, the protruding length of the rear wing portion In a block with a longer wing than that of the front wing, the stepped portion due to the rear high part becomes longer to form an inwardly curved revetment.
Moreover, when the blocks are stacked in the front-rear direction, the rear surface of the front block and the front surface of the rear block engage with each other so that the blocks can move to the left and right. By arranging the blocks that are arranged so as to face each other in the rearward direction by slightly shifting in the left-right direction, it is possible to match the predetermined step with the same curvature, and even if stacking in multiple steps in the front-back direction The lateral gap is small, and people can easily go up and down by the stairs formed continuously in the lateral direction.

In the case of a block in which the front wing portion has a long protruding length, the stepped portion due to the front lower portion becomes long and an outwardly curved revetment can be formed.

When the front wing and the rear wing are of equal length, the blocks are slightly shifted to the left and right by utilizing the above-described engagement relationship of the blocks in the vertical direction, and the wing end faces are slightly inward or outward. By opening and abutting, it is possible to perform construction corresponding to a curved portion having a relatively large curvature.

Further, the blocks are interconnected by the engagement relationship between the projections and the recesses on the front and rear surfaces of the block body and the action of the filler in the space between the front and rear wings and the side surface of the block body.

(Embodiment) Hereinafter, a block according to the present invention will be described in detail based on an illustrated embodiment.

1 to 5 show blocks according to an embodiment of the present invention. In the figure, reference numeral 1 is a block main body, and a step 2 is formed on the upper surface of the block main body 1 at a position of exactly half in the front-back direction, and the step 2 divides the block into a front lower part 3 and a rear high part 4. . The step 2 constitutes a riser portion of the stairs when the block is arranged on the slope, and the height of the step 2 can be easily climbed or descended by an old person or an infant regardless of the tonnage of the block. For example, it is set to about 20 cm or less. Front lower part 3 and rear higher part 4
The upper surface of may be slightly tilted forward to prevent the accumulation of driftwood and sand. Further, the bottom surface of the block body 1 is an inclined surface corresponding to the legal gradient to be constructed.

Front wing portions 5 are integrally formed at the front portions of both side surfaces of the front lower portion 3 so as to project. The front wing portion 5 has a front surface which is flush with the front surface of the block body 1 and a rear surface which is inclined rearward, and a front end surface 5a thereof is formed perpendicular to the front surface.

Rear wing portions 6 are integrally formed on the front portions of both side surfaces of the rear high portion 4 so as to project therefrom. The rear wing portion 6 is formed substantially in the same shape as the front wing portion 5, but the protruding length from the root to the base is slightly longer than the front wing portion 5, for example, ΔB =
It is formed with an extra protruding length of about 0.6 cm to 3 cm (see FIGS. 3 and 4).

Reference numeral 7 (see FIG. 2) in the figure denotes the front wing portion 5 and the rear wing portion 6.
Groove for wire hooking formed on the bottom surface of the
(See FIGS. 5 and 5) are supporting pieces projecting from the front and rear surfaces of the rear wing portion 6 and the lower portion of the rear surface of the front wing portion 5 for supporting a square block described later.

As shown in FIG. 6, a recess 9 is formed on the rear surface of the block body 1.
Is formed, and this recess 9 is formed on the front surface of the block body 1.
A protrusion 10 that engages with is projected. The combination of the protrusion 10 and the recess 9 is provided at a position where the blocks arranged in the front-rear direction are offset by the level difference between the front lower portion 3 and the rear high portion 4 described above. Therefore, two blocks are arranged in the front-rear direction, and both blocks are arranged in the recess 9 and the projection.
When they are connected by 10, three steps 2 having the same height are formed between both blocks.

The recess 9 extends in the right and left direction at an appropriate position on the rear surface of the block body,
Both ends of the block are open and the protrusions on the other block
When 10 is engaged, the block can be shifted to the right and left by an appropriate amount.

In addition, the recess 9 is formed by notching the lower end of the rear surface of the block body 1 into a shape in which the projection 10 can be engaged so that the projection 10 can escape to the lower side of the block body 1. It guarantees flexibility.

The protrusion 10 extends in the left-right direction from the front surface of the block main body to the front surface of the front wing portion, and is formed to be longer than the left-right direction length of the recess 9. In the engagement state with the recess 9, the projection 10 extends in the left-right direction. The protruding portion 10a performs the same function as that of the support piece 8 described above.

By the way, among the blocks according to the present invention, the 4t block used for the 40% slope has, for example, a planar outer dimension of 2.
1m, length 1.8m, minimum body thickness 63cm, tread slope approx. 1 /
If it is 12, the kicking height is 15 cm, the tread width is about 87 cm, and the opening ratio is about 20%. The difference ΔB in the protruding length of the front and rear wings is 1.5 cm for the seawall curved outward with a radius of curvature of about 50 m. Can be set. Therefore, in the case of the block according to the present invention, the kick-up height can be made small for a block having a large weight tonnage, ΔB is not so large, and the lateral gap between the blocks is also small. .

In order to carry out the covering work using this block A, first, as shown in FIG. 7, a base layer 11 such as a crusher is provided on the gently sloped surface, and then a futon basket or green stone etc. To form a kind of filter layer 12, and block A is placed on the filter layer 12 so that the front lower part is located on the sea side. When mounting these blocks A on the filter layer, wires are hooked in the groove portions 7 formed on the lower surfaces of the blade portions 5 and 6 and suspended.

The blocks arranged in parallel on the filter layer in the left-right direction are slightly curved inward because the rear wings 6 project longer than the front wings 5, resulting in an inner curve with two steps. The first shore revetment layer C1 is constructed.

As shown in FIG. 8, by further arranging the block A in the left and right direction behind this, the second-stage revetment layer C2 with an inner curve is formed behind the first-stage revetment layer C1 and the back. The third revetment layer C3 is built in sequence.

For example, if a block of 2.5 cm is used as ΔB from the first revetment layer C1 to the third revetment layer C3 and a block of 3.0 cm is used as ΔB for the fourth and fifth revetment layers C4 and C5, the inner curve A revetment with a radius of curvature of R = 25m is constructed. In this example, a 2t, 40% type is installed with a gradient of 1: 4.

In this case, the projection 9 on the front surface of the rear block engages with the recess 9 on the rear surface of the front block, but this engagement state can be shifted in the left-right direction by an arbitrary amount. The gap between the blocks adjacent to the left and right can be made as small as possible while easily adjusting the difference in height.

The blocks arranged in this manner are connected to each other with the front and rear blocks engaging the projection 10 and the recess 9. In addition, between adjacent blocks, wings 5,
Since the space portion 13 is surrounded and formed by 6 and the side surface of the block main body, by filling the space portion 13 with green stone or the like, the frictional resistance keeps the connection.
Depending on the situation of the construction site, concrete may be placed in the space 13 instead of the glystone or the like, or a precast concrete block previously formed in a predetermined shape may be fitted therein. This square block has a thickness equal to the length from the support piece 8 provided on the front and rear surfaces of the wings 4 and 5 or the protrusion 10 provided on the front surface of the block main body to the top surface of the wings and the same planar shape as the space 13. With this structure, the bottom surface of the square block is not directly placed on the slope, and the upper surface of the square block can be kept flush with the upper surfaces of the wings 4 and 5 and the block body 1 at all times.

In the staircase surface thus formed on the slope, the step 2 on the upper surface of each block and the step formed on the joint portion of each block in the front-rear direction are both continuous in the lateral direction, and the rise height is Since it is not so large, an infant or the like can easily climb up and down.

Also, the waves that have climbed up the slope are depleted by the large number of steps in the block A, most of them are absorbed by the filling stones and the like in the space 13 and the rest is a return flow that flows down the surface. . At this time, the space portion 13 causes the step 2 of the block A to
Since it is formed in contact with the front surface of the wing portion that is extended in the left-right direction, the rising waves are effectively absorbed while colliding with the front surface of the wing portion.

Part of the absorbed water is absorbed by the sandy soil 14,
Most of the light travels through the filter layer 12 and comes out to the front edge with a timing shifted from the above-described return flow.

In this way, both the amount of return flow and the flow velocity on the surface slope are significantly reduced and erosion or scour on the beach is prevented.

Further, the block arranged as described above has a porous structure over the entire revetment, so that it does not cause a partial suction phenomenon of earth and sand, and its flexibility allows it to follow the settlement of the slope. As a result, a cavity or the like is not created on the back side.

FIG. 9 shows a block according to another embodiment of the present invention, in which the front wing portion 25 has a protruding length longer than that of the rear wing portion 26. By arranging and constructing layers, a revetment with an outer curve as shown in Fig. 10 is constructed.

In these examples, one wing portion is formed longer than the other wing portion, but its specific length is the size of the block, the curvature of the curved portion, and the wing portions to be butted. It is set as appropriate in consideration of the size of the gap that may occur between them.

FIG. 11 shows an array construction state of blocks according to still another embodiment of the present invention. In this block, the protruding lengths of the front wing part 35 and the rear wing part 36 are equal, and the blocks adjacent to each other in the lateral direction are arranged in layers so that the corresponding end faces of the wing parts are completely in close contact with each other. For example, you can build a straight revetment. Also, as shown in the figure, if the blocks in the front-rear direction are shifted to the right and left by an arbitrary amount and engaged, and the end faces of the blades that are butted are brought into contact with each other slightly inward or outward, It is possible to construct a revetment with a gentle curve.

In addition, the above-mentioned block can be used by appropriately combining these in, for example, an inner curve, an outer curve, and a long continuous coastline, and in this case,
A revetment with a gentle curvature is built along the natural coastline.

(Effect of the Invention) As described above, according to the first invention, the protruding length of one of the front and rear wings is formed to be longer than the protruding length of the other blade. By arranging the blocks in layers and abutting the end faces of the corresponding wing portions of the blocks adjacent to each other in the lateral direction, the blocks can be arranged in order on an inner curve or an outer curve having a predetermined curvature, and Since the recesses and the projections that connect the blocks in the vertical direction are engaged with each other so that the blocks can move in the horizontal direction, it is possible to dispose the blocks in each step by shifting them by an appropriate amount laterally. Not only can it be stacked with a constant curvature for each stage, but also the gaps between blocks, especially between adjacent blocks in the lateral direction, can be minimized.

In the second invention, although the protruding lengths of the front and rear wings are the same, since the engagement relationship of the blocks in the front-rear direction has the same structure as described above, the revetment of the straight part is constructed. As a matter of course, even in a curved portion having a large radius of curvature, curving can be performed without causing a large gap.

Further, in both devices, a step is formed on the upper surface of a single block body to divide the block body into a front lower portion and a rear high portion, and this portion also constitutes a stair climbing portion. Even if it is within a limited shape, length and width range, the rise height can be set as small as possible and the tread surface does not have to be steeply stacked. I will be done.

Further, the blocks are not only interconnected by the engagement state of the projections and the recesses in the front-rear direction, but also are displaced by the frictional force of the filler in the space surrounded by the blades and the block body. Since this is prevented, the single dropout can be prevented as much as possible.

Furthermore, since the space part that permeates and absorbs seawater is formed in contact with the rear surface of the wing part, seawater that collided with the rear surface of the wing part can be drawn into the space part as it is, and the flow rate of the return flow can be increased by the high absorption capacity. In addition, it is possible to prevent the suction phenomenon of earth and sand due to the flexibility when a large number are arranged on the slope.

[Brief description of drawings]

FIG. 1 is a perspective view of a block according to an embodiment of the present invention as seen from the front upper side, FIG. 2 is a perspective view of the block as seen from the rear, FIG. 3 is its plan view, and FIG. 4 is its front view. 5 and 5 are side views thereof, FIG. 6 is a cross-sectional view taken along line VI-VI of FIG. 4, FIG. 7 is an explanatory view showing its use state, FIG. 8 is a plan view of FIG. 7, and FIG. FIG. 10 is a perspective view of a block according to another embodiment, and FIG.
FIG. 11 is an explanatory diagram showing a plane arrangement state of blocks in the figure, and FIG. 11 is an explanatory diagram showing a use state of blocks showing still another embodiment. 1,21 …… Block main body, 2 …… Steps, 3 …… Lower front part,
4 ... rear high part, 5,25,35 ... front wing part, 6,26,36 ... rear wing part, 5a, 6a ... wing end face, 8 ... support piece, 9 ... recess, 10 ... Protrusion

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-63-75209 (JP, A) JP-A-55-39590 (JP, A) Jitsuko 55-44894 (JP, Y2)

Claims (2)

[Scope of utility model registration request] 1. A block main body is divided into a front lower part and a rear high part by providing a step in the front-rear direction on the upper surface of the block main body, and a front wing part and a rear high part are formed in front parts of both side faces of the front lower part. When the rear wings are formed so as to project from the front parts of both side surfaces, and the blocks that are laterally adjacent to each other are arranged so that the tip surfaces of the adjacent wings are abutted, In a staircase block for revetment, in which a space portion filled with green stone is surrounded and formed by the rear wing portion and the side surface of the block body, a protrusion of one of the front wing portion and the rear wing portion The length is formed to be longer than the protruding length of the other wing portion, and a recess is formed on the rear surface of the block body, the recess extending in the left-right direction and open at both ends, while the block is formed on the front surface of the block body. The main body can be moved left and right Revetments for stepped block, characterized in that a projection for engagement with the recess in the state. 2. A block main body is divided into a front lower portion and a rear high portion by providing a step in the front-back direction on the upper surface of the block main body, and a front wing portion and a rear high portion are provided at the front portions of both side surfaces of the front lower portion. When the rear wings are formed so as to project from the front parts of both side surfaces, and the blocks that are laterally adjacent to each other are arranged so that the tip surfaces of the adjacent wings are abutted, In a staircase block for bank protection, in which a space portion filled with glystone or the like is surrounded and formed by the rear wing portion and the side surface of the block main body, the protruding lengths of the front wing portion and the rear wing portion are equal to each other, and A protrusion is formed on the rear surface of the block body, which extends in the left-right direction, and has both side ends open, while a projection on the front surface of the block body, which engages with the recess so that the block body can move in the left-right direction. It is characterized by having Revetments for stepped block that.