JPH07259049A - Concrete block for revetment - Google Patents

Abstract

PURPOSE:To facilitate the movement adjust the installed position with good accuracy, setting off a large space relative to the underlay, and perform the installing works safely. CONSTITUTION:At the bottom surface of each concrete block 1, a plurality of mild steel bars 7 are furnished protrusively for formation of a space relative to the surface on which the concrete block is placed. A suspending member 5 for concrete block is installed on one of the side faces of the concrete block 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for laying concrete blocks, and more particularly to a method used for laying large and heavy concrete blocks.

[0002]

2. Description of the Related Art Conventionally, large-scale concrete blocks, which are also called tension blocks, product blocks, or formwork panels, have been used for revetment work on the sea or rivers, on surfaces such as roads and residential land, on slopes or stairs. It is used. Then, the concrete block laying work using this concrete block was performed as follows.

That is, after the foundation of the laying surface on which the concrete block is laid is finished, a space is provided between the concrete block and the foundation to be the laying surface while being supported by a supporting member such as a jack or a spacer. To do. Then, fresh concrete is poured between the concrete block and the base to cure it. The laying work is completed when the concrete hardens.

[0004]

By the way, in recent years, there is a tendency to reduce the number of concrete blocks in response to the demand for shortening the construction period and reducing the cost. As a result, 1
The individual concrete blocks are becoming larger and heavier. Therefore, it is difficult to easily and reliably move and dispose a concrete block of about 1 ton at a proper laying position.

Further, the concrete block is not limited to the laying position. Normally, when forming a revetment, concrete blocks are continuously provided on a curved laying surface, but alignment, especially height adjustment, at these connecting parts is not easy, and a lot of time and effort is required for the work. I need it. In particular, in the case of arranging concrete blocks continuously with a certain inclination angle along the north pole installation surface, there was no choice but to rely on the skill of the operator.

That is, since the above-mentioned positioning work is to move a temporarily placed heavy concrete block to an appropriate laying position while adjusting it, it is a heavy labor and requires skill to secure a worker. Is difficult to achieve, and unevenness often occurs in the finished state of construction. In addition, there is a danger that an operator's hand or foot may be caught between the concrete block and the concrete block for adjusting the position. Therefore, the construction is not safe and the construction period is long due to careful work, and the construction cost is accordingly high.

In view of the above-mentioned problems, the present invention can be easily carried to the laying position, and the alignment work of each continuously laid concrete block can be easily carried out. It is an object of the present invention to provide a concrete block for seawall protection that can be shortened and that can make the finished state of construction uniform and beautiful.

[0008]

In order to achieve the above-mentioned object, a concrete block for revetment according to the present invention has a space between the bottom surface of the concrete block and a mounting surface on which the concrete block is mounted. A plurality of reinforcing bars for forming are formed to project, and a member for suspending the concrete block is attached to one side surface of the concrete block.

The projecting portion of the reinforcing bar projecting from the bottom surface side of the revetment concrete block may be formed to have a substantially U-shaped cross section.

The suspension member may be removable from the concrete block. In this case, a mounting hole into which the suspending member is screwed may be provided on one side surface of the concrete block.

[0011]

According to the concrete block for revetment, a large space can be formed between the concrete block and the mounting surface. Therefore, a wire or the like can be easily laid around the bottom surface of this concrete block.
If a wire of a crane or the like is engaged with the suspending member so as to suspend the suspension member, the concrete block can be reliably held and moved.

Further, the reinforcing bars arranged on the bottom surface side of the concrete block improve the adhesion when the concrete block and the base are joined and fixed with ready-mixed concrete or the like.

[0013]

EXAMPLE In this example, the shape of a concrete block for revetment according to the present invention will be described first with reference to the drawings, and then a method for laying the concrete block for revetment will be described.

First, the concrete block 1 for revetment according to the present embodiment is formed in a rectangular plate shape as shown in FIGS. 1 to 6.

As shown in FIG. 1, in this embodiment, the bulging portion 2 is provided at a position deviated from the center of one side surface 1a in the longitudinal direction toward the lower end side. The bulging portion 2 is formed in the longitudinal direction of the concrete block 1 and has a trapezoidal cross section in which the tip end is narrow. In this embodiment, the bulging portion is the side portion 2
A plurality of A, 2B and a central portion 2C are arranged separately.

That is, by arranging a plurality of bulging portions 2 in a straight line along the longitudinal direction on one side surface 1a of the concrete block 1, a connection position adjusting member, which will be described later, abuts the adjacent concrete blocks. The angle is adjustable. The bulging portion 2 may be provided in series along the longitudinal direction of one side surface.

Further, as shown in FIGS. 4, 6 and 7, in the vicinity of both sides of the bulging portion 2 provided on the one side surface 1a, the same height position as the lower surface side of the bulging portion 2 is provided. Is provided with a nut member 4. The nut member 4 is embedded and attached by a molding method such as insert molding when the concrete block 1 is molded.
The nut member 4 is for screwing the bolt member 3 serving as a connection position adjusting member. That is, the bolt member 3 is screwed into the nut member 4, and the length of the protruding amount of the bolt member 3 can be adjusted by adjusting the screwing amount.

Further, as shown in FIGS. 8 and 9, when carrying the concrete block 1, a hook member 5 for suspending the concrete block is screwed into the nut member 4 instead of the bolt member 3. It is designed to be. In this embodiment, the bolt member 3 and the hook member 5 are replaceable with respect to the nut member 4, but if the bolt member 3 has a hook function for suspending a concrete block. , It does not need to be replaceable.

Next, on the other side surface 1b in the longitudinal direction of the concrete block 1, as shown in FIG. 2, an engaging concave portion 6 with which the bulging portion 2 is engaged is provided in the longitudinal direction. As shown in FIG. 10, the engaging recess 6 has an upper surface serving as an engaging surface 6a engaged with the upper surface 2a of the bulging portion 2, and a lower surface serving as a connecting angle by the connection position adjusting member. The tilt regulating surface 6b is adjusted. Further, the engagement recess 6 is configured such that, when engaged with the upper surface 2a of the bulging portion 2, the height position of the upper surface side 1c of the concrete block 1 becomes flush. On the other hand, the inclination regulating surface 6b of the engaging concave portion 6 is configured so that the engaging position is regulated by the tip 3a of the bolt member 3 which serves as the connecting position adjusting member. Therefore, as shown by the broken line in FIG. 10, the engagement angle θ between the engaging recess 6 and the bulging portion 2 is engaged with the upper surface 2 a of the bulging portion 2 by the amount of protrusion of the bolt member 3. It is designed to be variable around the upper surface of the fitting recess 6.

Further, as shown in FIG. 3, the upper surface side 1c of the concrete block 1 has an appearance as the concrete block 1 arranged along a river or a shore, and is formed by various types of unevenness. Design is given. In this example, a circular concave portion 9 is further formed on the concave portion 8 formed in a substantially square shape.

Further, the concrete block 1 is
As shown in FIGS. 2, 4 and 5, a block support member 7 composed of a plurality of reinforcing bars is provided in a protruding manner on the bottom surface side 1d. In this embodiment, four support members 7 are two
They are arranged in rows. The block supporting member 7 is provided so as to project from the bottom surface side 1d of the concrete block 1 in a substantially U-shaped cross section, and is embedded and attached when the concrete block 1 is molded. .

The block supporting member 7 is for forming a space g between the concrete block 1 and the base 11 which is the laying surface of the concrete block 1. Further, as shown in FIG. 9, the block support member 7 serves as an engagement member with a block holder described later when carrying the concrete block 1. The block support member 7 improves the adhesion when the concrete block 1 and the base 11 are joined and fixed with ready-mixed concrete or the like.

Next, spacer positioning recesses 18 are provided near the corners on the bottom surface side 1d of the concrete block 1, respectively. The spacer positioning recess 18 is formed by insert-molding a recessed mold 18a when the concrete block 1 is molded. The spacer positioning recess 18 is for positioning and mounting a spacer used for positioning for height adjustment when disposing the concrete block 1.

Next, a method for laying a concrete block for revetment according to the present invention constructed as described above will be described. 11 to 19 are diagrams showing a method of laying a concrete block for seawall according to the present invention in order of seawall construction.

First, as shown in FIG. 11, after foundation work is carried out at the laying position of the concrete block 1 by installing the crushed foundation stone 10, the foundation block 20, etc., the foundation 11 is formed. The base 11 is formed by driving in soil, crushed stone or concrete.

The basic block 20 may be formed in a normal trapezoidal shape as shown in FIG. 11, but a basic block 20A as shown in FIG. 12 may be used. The base block 20A has a step portion 21 at a position corresponding to the engaging recess 6 of the concrete block 1 and is for facilitating the connection of the concrete block 1. That is, according to the basic block 20A, the step portion 21 replaces the bulging portion 2, and the step portion 21 and the concrete block 1 are replaced.
By engaging with the engaging recesses 6 of, the concrete block 1 can be easily positioned and arranged. Also, FIG.
As shown in 3, the first concrete block 1A
It is possible to use the same as the second and subsequent concrete blocks 1B.

When the weight of the concrete block 1 to be laid is large, it is desirable that the above-mentioned base 11 is appropriately flattened by concrete driving.

Next, as shown in FIG. 9 and FIG. 14, one concrete block 1 (1A) among a large number of concrete blocks carried in the vicinity of the site is hung by a wire 12 etc. using a crane or the like, It is temporarily arranged at a predetermined position along the surface of the base 11. At this time, for hooking the wire on the concrete block 1, as shown in FIG. 8, a hook member 5 for hanging is screwed onto a nut member 4 provided on one side surface 1a of the concrete block 1, and the hook member 5 for hanging is hooked. The wire 12 may be hooked on the hook member 5 of the above.

When carrying the concrete block 1, the rod-shaped portion 1 as shown in FIGS. 9 and 14 is used.
If the block holder 13 having 3a is used, it becomes easier to carry this concrete block.

The block holder 13 includes a bar-shaped portion 13a on a block support member 7 which is arranged on the bottom surface side 1d of the concrete block 1 and is made of a reinforcing bar having a substantially U-shaped cross section.
The concrete block 1 is inserted into the concrete block 1 and the hook 13b is hooked on the hook member 5 for positioning.
Can be lifted. That is, the concrete block 1 is lifted by pulling up the block holder 13 via the wire 12 with a crane or the like, and the concrete block is easily carried. At this time, the hook 13b prevents the concrete block 1 from slipping off from the rod-shaped portion 13a, and even if the rod-shaped portion 13a is damaged, the concrete block 1 is prevented from dropping. .

Further, the block holder 13 is provided with a plurality of engaging holes 13c as hooking portions for the wires 12, and the position at which the wires 12 are connected is variable, so that it is suitable for the slope of the construction surface. The bar-shaped portion 13a is set at an angle so that the concrete block 1 can be tilted and moved appropriately.

Since the concrete block is placed by the block support member 7 in a state of being lifted from the placement surface, the block holder 13 is attached to the block support member 7 on the bottom surface side 1d of the concrete block 1.
The rod-shaped portion 13a can be easily attached.

On the other hand, even when such a block holder 13 is not used, the hanging hook member 5 is used.
If the wire 12 is hooked on the wire 12 and the wire 12 is inserted into the block support member 7 and hung around, the wire 12 can be reliably prevented from being unhooked.
It is possible to carry the concrete block 1 reliably and easily.

It should be noted that instead of the above-mentioned crane, other suitable machines, instruments or vehicles such as chain blocks may be used. Even in this case, the concrete block 1
Is made to float from the mounting surface by the block support member 7, so that the concrete block 1 can be easily transported.

In the temporary arrangement, the base 1
Positioning in the direction along the surface of 1 and height positioning are performed. At this time, the bottom side 1 of the concrete block 1
A plurality of block support members 7 provided in d will arrange the concrete block 1 above the base 11 at a position that is elevated by the height of the block support member 7. Therefore, the worker does not pinch his arm or leg between the block and the base surface, and safe work is possible.

Further, fine adjustment of the alignment of the concrete block 1 is performed. For fine adjustment of the position of this concrete block 1,
At the corners of the corner, a manual hydraulic jack 14 is arranged between the base 11 and the concrete block 1, and after supporting the concrete block 1 with these hydraulic jacks 14, the wire 12 and the block holder 13 described above are attached. Remove. By adjusting the heights of the four hydraulic jacks, the height position and the inclination of the upper surface side 1c of the concrete block 1 are finely adjusted.

For this fine adjustment, for example, the upper surface side 1c or the edge of the concrete block 1 may be aligned with the water thread provided in advance based on the design drawing. FIG. 15 shows a state in which this fine adjustment has been completed. The hydraulic jack 14 used here is a low-floor type equipped with a bracket for supporting a load at a position lower than the upper end of the plunger, and the bottom side 1d of the concrete block 1 after adjustment. The work design is performed so that the width g of the space g between the base 11 and the surface is about 8 to 12 cm.

Next, as shown in FIG. 16, a spacer 15 whose length can be adjusted is arranged between the concrete block 1 and the surface of the base 11 in the spacer positioning recess 18 provided on the bottom surface side 1d of the concrete block 1. To do. The spacer 15 serves as a support member for adjusting and supporting the laying position of the concrete block 1. That is, by raising the spacer 15, the spacer 15 temporarily receives a part of the weight of the concrete block 1. Then, the hydraulic jack 14 is loosened and the hydraulic jack 14 is removed from the temporarily received concrete block 1. Thereby, as shown in FIG. 17, the first concrete block 1A is arranged at the final position.

If the spacer 15 serving as a supporting member is previously attached to the concave portion 18 when the concrete block 1 is installed, it is not necessary to attach the spacer 15 after jacking up, and the detachment after the attachment can be avoided. . In addition,
In this case, the concrete block 1 is the spacer 15
The height position can be adjusted without using the hydraulic jack 14 as long as the weight can be raised and lowered by the jack function of itself.

Then, in order to adjust the position of the second concrete block 1B which is continuously arranged following the first concrete block 1A, the second concrete block 1B of the first concrete block 1A and the second concrete block 1B of the first concrete block 1A are adjusted. A bolt member 3 serving as a connection position adjusting member is screwed into a nut member 4 provided below a bulging portion 2 provided on one side surface adjacent to the nut member 4, and the amount of protrusion of the bolt member 3 from the nut member 4 is increased. Adjust the length of.

Next, the arrangement of the second concrete block 1B adjacent to the first concrete block 1A arranged as described above will be described.

First, the same steps as in the case of the first concrete block 1A are carried out, and the second concrete block is placed at a predetermined position along the surface of the base material 11 adjacent to the first concrete block 1A. Temporarily arrange 1B. At this time, the engaging recessed portion 6 provided on the other side surface of the second concrete block 1B is abutted against the bulging portion 2 provided on one side surface in the longitudinal direction of the first concrete block 1A so as to be temporarily arranged adjacent thereto. .

Therefore, the second concrete block 1B has the second concrete block 1B with the protruding amount of the bolt member 3 attached to the first concrete block 1A whose length has been adjusted in advance.
The position of the tilt restricting surface 6b in the engaging recessed part 6 is restricted, so that the first concrete block 1A is automatically positioned and arranged as shown in FIG.

Furthermore, when fine adjustment of the alignment of the second concrete block 1B is required, fine adjustment is performed using the hydraulic jack 14 and the spacer 15 as in the case of the first concrete block 1A. Should be done. In this case, the joint portion of the second concrete block 1B with the first concrete block 1A is the first concrete block 1A.
Since it is supported by the bulging portion 2 of the hydraulic jack 1,
The position temporarily received by 4 or the spacer 15 may be set only on the side facing the joint portion.

By repeating the above steps in the same manner, an appropriate number of continuous concrete blocks are arranged. Then, as shown in FIG. 19, fresh concrete 16 is poured into the space g between the concrete block 1 and the base 11. After that, an appropriate number of concrete blocks 1 are constructed and arranged in the same manner as described above, and ready-mixed concrete 16 is poured into the space g between the concrete block 1 and the base 11. By repeating these, the concrete block 1 is arranged in the entire construction area, and the space g
The fresh concrete 16 is poured into and cured. And
When the green concrete 16 is hardened, the concrete block 1 is fixed and the laying work is completed.

By the engagement of the bolt member 3 serving as the connecting position adjusting member and the engaging concave portion 6, it is possible to reliably prevent the second concrete block 1B from rising at the connecting portion when the fresh concrete 16 is poured. To be done.

As described above, if the concrete block laying method according to the present embodiment is used and the concrete block laying method is used, a large-sized concrete block can be easily moved to perform the laying work very easily. Therefore, it is possible to form a revetment that is adjusted accurately and in a short time. Therefore, the construction period of the concrete block laying construction can be shortened, and the cost required for the construction can be reduced accordingly. In particular, it can be suitably applied to the construction work of a large-scale concrete block having a weight of about 1 ton or more.

Further, since the height position of the laid concrete block on the upper surface side 1c can be easily and accurately aligned, a uniform and beautiful finish can be obtained without being influenced by the skill level of the operator. it can. Further, since the space g between the concrete block 1 and the base 11 can be made large, safe work can be performed without pinching hands or feet between the concrete block 1 and the base 11.

Furthermore, the flow of the green concrete 16 in the space g is improved, and the green concrete 16 can be sufficiently spread to every corner of the space g. Therefore, it is possible to obtain a robust structure having good adhesion between the concrete block 1 and the base 11. Further, the block support member 7 on the bottom surface side 1d further improves the adhesion.

Further, it is not necessary to finish the surface of the base 11 to be flat as in the conventional case, and unevenness may be provided as long as the spacer 15 can be temporarily received.

Since the spacer 15 is embedded in the ready-mixed concrete 16, an inexpensive spacer having a simple structure may be used. FIG. 20 is a sectional view showing an example of the spacer 15A.

The spacer 15A includes a first bolt 15b having a left-hand thread and a second bolt 15c having a right-hand thread, which are erected on the base 15a.
They are connected by 5d. Then, by rotating the hexagonal nut 15d, the hexagonal nut 15d of both the first and second bolts 15b, 15c is rotated.
The amount of protrusion from is variable. Therefore, the height can be adjusted according to the length of the nut.

Further, as a spacer similar to this, for example, a screw type jack used as a foundation of a scaffold for construction work can be used. Further, the bulging portion 2 on the one side surface side of the concrete block instead of the bottom surface side may be supported by the hydraulic jack or spacer. In this case, the spacer can be removed and reused after the ready-mixed concrete has hardened.

In the above-mentioned embodiment, the green concrete 16 is poured into the space g, but mortar, cement, and various other things may be poured.

Further, in the above embodiment, the hydraulic jack 14 is arranged after the concrete block 1 is temporarily arranged, but the hydraulic jack 14 may be arranged in advance before the concrete block 1 is arranged. At that time, the spacer 15 may also be arranged in advance. Further, if the height position can be adjusted like the spacer 15A described above, the hydraulic jack 14 can be omitted.

The hydraulic jack 14 may be operated by hydraulic pressure from a hydraulic unit driven by a dynamic electric machine or an internal combustion engine. Furthermore, hydraulic jack 1
Instead of 4, a hydraulic jack or a screw type jack may be used.

Next, in the above-mentioned embodiment, a reinforcing bar having a substantially U-shaped cross section is attached to the bottom surface side 1d of the concrete block as the block supporting member 7, but the shape of this reinforcing bar supports the concrete block. Other shapes may be used as long as they can be processed.

In this embodiment, the plate-shaped rectangular concrete block has been described, but it may be used for a polygonal block having two opposite sides, and it is formed in a step shape as shown in FIG. You may use for the concrete block 25 for seawalls.

[0059]

According to the present invention, it is easy to move,
It is possible to provide a concrete block for a revetment that can adjust the installation position accurately in a short time, shorten the construction period, make the finish of the work beautiful and uniform, and take a large space with the base surface. it can.

That is, since a large space can be secured between the concrete block and the placing surface, a safe work can be performed without pinching hands or feet between them.
Then, at the time of revetment construction with this concrete block, it is extremely easy and safe to easily hang wires etc. around the bottom surface of this concrete block, and further, for example, wires such as cranes etc. are used as the above-mentioned hanging members. If they are also engaged and positioned together, even a large-sized concrete block for seawall protection can be transported by reliable holding.

Further, the reinforcing bars arranged on the bottom surface side of the concrete block can also improve the adhesiveness when the concrete block and the ground surface are joined and fixed with ready-mixed concrete or the like.

[Brief description of drawings]

FIG. 1 is a perspective view of a concrete block for seawall according to the present invention as viewed from the front side.

FIG. 2 is a perspective view of the revetment concrete block seen from the bottom side.

FIG. 3 is a front view of the revetment concrete block.

FIG. 4 is a side view of the concrete block for seawall protection.

FIG. 5 is another side view showing a part of the concrete block for revetment by cutting away.

FIG. 6 is a cross-sectional view of the concrete block for seawall protection.

FIG. 7 is an enlarged perspective view of an essential part showing a state in which a bolt member is about to be screwed into the nut member of the concrete block for seawall protection.

FIG. 8 is an enlarged perspective view of an essential part showing a state in which a hook member is about to be screwed onto the nut member of the concrete block for seawall protection.

FIG. 9 is a perspective view showing a suspended state of the concrete block for seawall protection.

FIG. 10 is a cross-sectional view of essential parts showing an engaged state of the concrete block for seawall protection.

FIG. 11 is a diagram showing a state of revetment work using the concrete block for revetment according to the present invention, and is a schematic cross-sectional view showing a base forming step.

FIG. 12 is a perspective view of a basic block.

13 is a schematic cross-sectional view showing an arrangement state of revetment concrete blocks when the foundation block shown in FIG. 12 is used.

FIG. 14 is a diagram showing a state of the revetment work and is a schematic cross-sectional view showing a temporary placement step of the concrete blocks.

FIG. 15 is a diagram showing a state of the revetment work, and is a schematic cross-sectional view showing a fine adjustment process of the concrete block.

FIG. 16 is a diagram showing a state of the above-mentioned revetment work, and is a schematic cross-sectional view showing a state where a spacer is put on the bottom surface of the concrete block.

FIG. 17 is a diagram showing a state of the revetment work and is a schematic cross-sectional view showing a state where fine adjustment of the concrete block is completed.

FIG. 18 is a diagram showing a state of the revetment work, and is a schematic cross-sectional view showing a state in which concrete blocks are continuously arranged.

FIG. 19 is a view showing a state of the above-mentioned revetment work, and is a cross-sectional view showing a state where fresh concrete is poured into the space between the concrete block and the ground surface.

FIG. 20 is a cross-sectional view showing an example of a spacer.

FIG. 21 is a schematic cross-sectional view showing an example of a revetment completed using the concrete block for revetment of the present invention.

[Explanation of symbols]

 1 Concrete block 4 Nut member 5 Hook member 7 Block support member

Claims (3)

[Claims] 1. A plurality of reinforcing bars for forming a space between the concrete block and a mounting surface on which the concrete block is mounted are projectingly formed on the bottom surface side of the concrete block, and one side surface of the concrete block is A concrete block for seawall protection with a concrete block suspension member attached. 2. The revetment concrete block according to claim 1, wherein the projecting portion of the reinforcing bar projecting from the bottom surface has a substantially U-shaped cross section. 3. The revetment concrete block according to claim 1, wherein the suspending member is detachably attached.