JP2003096754A - Concrete block for floodgate and method of manufacturing the same - Google Patents

Abstract

(57) [Abstract] [Problem] To be able to install concrete blocks for floodgates installed in gutter gates in a short period of time, reduce the construction period and cost, and have good quality, dimensional accuracy, watertightness, durability, etc. Floodgates should be easily accessible. A block 2 of a concrete block 1 for a floodgate installed on the river side of a gutter is constructed of a reinforced concrete precast rectangular culvert or a prestressed concrete precast rectangular culvert. The door body 3 is fixed integrally to the lower door stop 7 via the hinge 6 and the watertight sealing materials 10 to 11 are attached to the door body 3 and the block 2.
The floating gate is installed, and the completed precast concrete block for floodgate 1 is transported to the site and installed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a concrete block for a sluice installed in a gutter of a river embankment or an aqueduct for agriculture, and a method for producing the same.

[0002]

2. Description of the Related Art For example, a gutter (including a gutter pipe) is a box (including a gutter) structure that is installed across a river dike. A sluice (gate) is provided to prevent backflow to the inside of the bank when the river is flooded.

There are roller gate systems, flap gate systems, floating gate systems, and the like in this floodgate. The floating gate system has a structure in which the door body moves up and down due to a water level difference (buoyancy difference). It has the advantages that it is not necessary and the facility is simple, it does not require any manual operation to save labor, it does not need gate posts or shed, it does not damage the river landscape, and it has excellent wave resistance.

FIG. 8 shows an example of a floating gate type concrete block for a floodgate in a gutter (Japanese Patent Laid-Open No. 2001-172947, etc.). A door body 3 having a size capable of closing the cross section of 4 and capable of generating buoyancy in water is provided in a door storage space 5 on the river side so as to be tiltable in the flow path direction. The lower portion of the door body 3 is attached to the lower door stop 7 via a hinge 6, and is normally stored horizontally in the bottom portion of the door storage space 5. When the water level on the river side rises, the door body 3 stands up due to buoyancy and the water channel 4 is formed. Close.

Further, in order to improve the watertightness of the door body 3 in the closed state and to reliably prevent backflow and water leakage to the inside of the bank, seal members 10, 11, 12 made of rubber material are used. The lower seal member 10 is provided so as to cover the pivotally supported portion by the hinge 6 from above, and both ends thereof are attached to the lower portion of the door body 3 and the upper surface of the lower door stop 7 so as to be curved when the door body 3 stands up. The upper seal member 11 is attached to the upper part of the door body 3 or the upper door stop 8 (in the case of the illustrated example). The side seal members 12 are attached to both sides of the door body 3 so as to slide on the surface of the side door stopper 9 attached to the inner surface of the block 2.

Conventionally, the concrete block for a floodgate having the above-mentioned structure is generally constructed by the following procedure (see FIGS. 9 to 15).

(1) As shown in FIG. 9, a reinforcing bar (not shown) of the block is arranged at the installation position at the tip of the box 20 forming the channel of the gutter, and the bottom slab concrete 21 is placed. .

(2) As shown in FIG. 10, a pair of side door stoppers 9, 9 are temporarily placed on the bottom slab concrete 21, and a width stop auxiliary material 50 is attached to the inner surface thereof by welding, and a width stop material 51 is attached. Temporarily attach so that the side door contact 9 does not fall. The lower door stopper 7 and the upper door stopper 8 are arranged at predetermined positions, and both ends are bolted to the side door stoppers 9.

(3) As shown in FIG. 11, the side door contact 9
The position accuracy of is adjusted and the stiffening material (horizontal material, streak) 52 is attached. All anchors 53 to prevent the entire movement
Then, the side door stop 9 is fixed to the bottom slab concrete 21.

(4) As shown in FIG. 12, the mold 54 is assembled and concrete is poured to construct the concrete block 2. The side door stop 9 is used as part of the inner formwork.

(5) As shown in FIG. 13, the support material (width stop auxiliary material 50, width stop material 51, stiffening material 52) is removed. Deburring (grinding) of the welded portion traces of the side door stop 8 and the width stop aid 50 is performed.

(6) As shown in FIG. 14, the door 3 is made horizontal and drawn into the concrete block 2 and fixed to the lower door stop 7 by the hinge 6.

(7) As shown in FIG. 15, the lower seal member 10 and the side seal members 12, 12 (integral in U-shape in plan view) are held together with the pressing plate 13 and the bolt 14 to the door body 3 and the lower door contact. Attach to 7. The side seal members 12 and 12 are pushed outward by using an angle member and a turnbuckle, and then three-way bolts are fully tightened. The upper seal member 11 is attached to the upper door stopper 8 with the pressing plate 13 and the bolt 14.

[0014]

The above-mentioned conventional method for constructing a concrete block for a floodgate by cast-in-place has the following problems.

(1) It takes time to assemble the mold and side doors and to attach the gate member, thereby increasing the construction period and cost.

(2) It is difficult to control the quality and dimensional accuracy of the gate, and it is difficult to obtain a floodgate with good quality and precision.

(3) Since the width stop auxiliary material is welded to the side doors that require a smooth surface, distortion occurs due to welding, the watertightness of the door is reduced, and after the width stop auxiliary material is removed. Deburring work is required, which requires construction period and cost.

The present invention has been made to solve such a problem, and an object thereof is to be able to install a concrete block for sluice gates installed in a gutter or the like in a short period of time, and to reduce the construction period and cost. The present invention is to provide a concrete block for a floodgate and a method for producing the same, in which the floodgate can be reduced, and a floodgate excellent in quality, dimensional accuracy, watertightness, durability and the like can be easily obtained.

[0019]

According to a first aspect of the present invention, there is provided a concrete block for a floodgate in which an opening / closing door is provided in the concrete block, the concrete block being made of a precast product, and the precast concrete block before being installed. A concrete block for a floodgate, characterized in that an opening / closing door constituting member is provided in the.

In the present invention, the concrete block is a box or open channel installed on the river side of the gutter or on an agricultural canal, and the opening / closing door is a roller gate system, a flap gate system, a floating gate system or the like. Yes, the opening / closing door components such as the door stop are integrally incorporated in the precast product at the time of manufacturing, or are attached to the precast product at a factory or the like.

According to a second aspect of the present invention, there is provided a concrete block for a floodgate in which an opening / closing door is provided on the concrete block, the concrete block is made of a precast product, and the opening / closing door constituent member or one of the precast concrete blocks is manufactured at the time of manufacturing the precast concrete block. This is a concrete block for floodgates, in which the parts are integrally molded.

According to the second aspect, in the first aspect, all or a part of the opening / closing door constituting members such as the door stop and the shock absorbing device are integrally incorporated at the time of manufacturing the precast product.

According to a third aspect of the present invention, there is provided a concrete block for a floodgate in which a concrete block is provided with an opening / closing door, the concrete block comprising a reinforced concrete precast rectangular box or a prestressed concrete precast rectangular box. A concrete block for a floodgate, characterized in that an opening / closing door constituent member or a part thereof is incorporated by integral molding when the concrete block is manufactured.

The third aspect of the present invention is the case where the precast concrete block according to the second aspect is limited to a rectangular box made of reinforced concrete or a rectangular box made of prestressed concrete.

The fourth aspect of the present invention includes the first and second aspects.
Alternatively, in the concrete block for a floodgate according to claim 3, the opening / closing door is a float system that is pivotally supported so as to be tiltable in the flow direction and is undulated by buoyancy.

According to a fourth aspect of the present invention, the lower part of the opening / closing door is attached to the lower door stop through the hinge, and is normally stored horizontally in the bottom part of the block. When the water level on the river side rises, it rises due to buoyancy and the bank. This is a case where the opening and closing door is a floating gate type that closes the water channel 3 on the inner side.

According to a fifth aspect of the present invention, in the concrete block for a water gate according to the fourth aspect, the precast concrete block has a lower door stop for axially supporting the opening / closing door and a lower sealing member attached thereto, and an upper part of the opening / closing door. In the concrete block for floodgates, there is provided an upper door stop, which abuts via an upper seal member, and a side door stop, on which side seal members on both sides of the opening / closing door slidably abut. is there.

According to a fifth aspect of the present invention, in the floating gate type opening / closing door of the fourth aspect, in order to improve the watertightness of the closed state of the door body and reliably prevent backflow and water leakage to the inside of the bank, This is a case where the contact and the provision of the seal member are limited.

A sixth aspect of the present invention is the method for producing a concrete block for a floodgate according to the fifth aspect, wherein a lower door contact, an upper door contact and a side door contact are provided on the surface of the inner formwork on the concrete placing side. For a floodgate, which is characterized in that concrete is installed between the inner formwork and the outer formwork (in case of vertical striking) or the end formwork (in case of flat striking) by attaching fasteners (bolts etc.) It is a method of manufacturing a concrete block.

In this claim 6, the side door stop is
It is attached at a predetermined position on the surface of the inner formwork on the concrete pouring side and fixed with fasteners such as bolts. Further, the inner mold may be an integral mold, or may be a divided mold in which each divided mold is appropriately divided and each divided mold is integrated with a bolt or the like.

In the present invention having the above-mentioned structure, a water gate such as a gutter or an aqueduct for agriculture is completed only by installing a precast concrete block for a water gate on which opening / closing door constituent members such as a door stop and a door body are attached. In order to
The concrete block for floodgates can be installed in a shorter period of time than before, and the construction period and cost can be reduced.

Further, since it is a cast product in a factory, the concrete quality and dimensional accuracy are good, and the door stop member can also be attached to the block with good accuracy, and the quality, dimensional accuracy, watertightness, durability, etc. are good. You can easily get a nice lock.

Furthermore, since it is not necessary to weld the width stop aid to the side door stop as in the conventional case, distortion due to welding does not occur, and the watertightness of the opening / closing door can be sufficiently ensured.
In addition, there is no need for deburring work after removing the width stop auxiliary material,
The work period and cost can be reduced.

Further, it becomes possible to adopt a method of performing formwork assembling work for a waterway box or the like in the next step, using the highly accurate precast concrete block product for a floodgate of the present invention as a reference dimension.

[0035]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described below based on illustrated embodiments. This embodiment is an example applied to a concrete block for a water gate of a floating gate type installed on the river side of the gutter. FIG. 1 shows an example of a precast concrete block for floodgates of the present invention. 2 and 3 show various examples of molds used in the present invention.

As shown in FIG. 1, in the present invention, the concrete block 2 of the concrete block 1 for floodgates is used.
Is composed of a reinforced concrete precast rectangular box or a prestressed concrete precast rectangular box, and a floating gate is incorporated therein to form a sluice gate precast concrete block 1.

The floating gate is the same as the conventional one, and includes a door body 3, a water channel 4, a door storage space 5, and a hinge 6.
A lower door contact 7, an upper door contact 8, a side door contact 9, a lower seal member 10, and an upper seal member 11
And the side seal member 12, etc., as will be described later, when the precast concrete block 2 is manufactured, the lower door contact 7, the upper door contact 8, and the side door contact 9 are integrally formed with the block 2 by integral molding. Built in.
Further, the door stop 7 to 9 can be attached to the precast concrete block 2 afterwards. A stainless steel material is used for the doors 7 to 9, and the seal member 1
A rubber material is used for 0-12.

It is preferable that the door body 3 is attached to the precast concrete block 2 in a factory or the like, the sealing members 10 to 12 are also attached to the door body 3 in the factory or the like, and the completed precast concrete block 1 for a water gate is transported to the site. .
The seal members 10 to 12 are attached by the holding plate 13 and the bolts 14 as in the conventional case. The components of the floating gate are not limited to the illustrated example, but include a shock absorbing device provided in the upper door contact 8, a cushioning table on which the lying horizontal door body 3 is placed.

The precast concrete block 2 having the above-mentioned structure is manufactured by the mold shown in FIG. 2 or 3. Fig. 2 shows an example in which the formwork is integrated, and Fig. 3 shows an example in which the formwork is divided. In both cases, vertical casting (placing concrete with the block axis direction up and down) and flat casting (block axis). Concrete is placed with the direction horizontal.

In the integrally type and vertical formwork of FIG. 2A, an inner formwork 31 and an outer formwork 32 are installed on a formwork foundation 30. The inner formwork 31 is a formwork having a surface on the concrete pouring side corresponding to the shapes of the water channel 4 and the door storage space 5 in FIG. 1, and has a step portion corresponding to the lower door contact position and the upper door contact position. A lower door contact 7 and an upper door contact 8 are installed, respectively, and are fixed by appropriate means such as bolts. The side door stop 9 is attached to the side door stop position on the surface of the inner formwork 31 on the concrete pouring side, and is fixed by an appropriate means such as a bolt. Reinforcing bars, ribs, and the like that are integrated with concrete are provided on each door 7 to 9.

Concrete is poured from above between the inner form 31 and the outer form 32 in which reinforcing bars are arranged or PC steel rod insertion pipes and the like are arranged, and after the concrete is cured, demolding is performed. For example, the precast concrete block 2 in which the lower door stopper 7, the upper door stopper 8, and the side door stopper 9 are integrally incorporated can be obtained.

In the integrated type flat mold shown in FIG. 2B, a horizontal inner mold 33 and an end mold 34 are used. Inner formwork 33
Has the same shape as the vertical inner formwork 31, and both end portions are supported by the end formwork 34. Other configurations are the same as the case of vertical driving in Fig. 2 (a). By pouring concrete from above, 7 lower doors, 8 upper doors and 9 side doors are integrated. The precast concrete block 2 can be obtained.

In the split-type vertical casting mold shown in FIG. 3A, the inner mold 31 is divided into three parts, and the respective divided inner molds are integrated by bolts 35 or the like. The divided internal formwork 31a is a portion corresponding to the water channel 4 in FIG. 1, and the divided internal formwork 31b and 31c are shown in FIG.
Is a part corresponding to the upper part and the lower part of the door storage space 5. By using the split type as described above, sufficient rigidity can be provided, and a more accurate precast product can be manufactured. The other structure is the same as that of the integrated type shown in FIG.

In the split-type flat mold shown in FIG. 3 (a), the inner mold 33 divided into three is arranged horizontally as in the above. Other configurations are the same as those of the split type shown in FIG. 2 (b).

As shown in FIG. 4, it is preferable to use fasteners such as bolts 36 and nuts 37 to fix the inner molds 31 and 33 and the doors 7 to 9 for each door. The nut 37 is arranged on the concrete pouring side, and the bolt 36 is attached and detached from the inner side of the inner formwork 31, 33. With such a fastener, it is possible to sufficiently secure the assembly accuracy of 7 to 9 for each door,
Further, it is possible to easily attach and detach 7 to 9 for each door.

FIG. 5 is a comparison of installation accuracy control of concrete blocks for floodgates between the conventional technique (casting on site) and the precast product of the present invention. In the prior art, it is necessary to control the accuracy of many items, but in the present invention, since it is precast, the dimensional accuracy is good, and
The dimensional accuracy can be confirmed in the factory, and only the height of the lower door contact needs to be controlled during installation.

FIG. 6 shows a case where the completed precast concrete block 1 for a floodgate of the present invention is installed on site. The precast concrete block 1 for a floodgate is hung in line with a reference line and placed on the slab concrete 21. install. To check the accuracy of the installation, just measure the height of 7 per lower door.

Further, as shown in FIG. 7, by using the installed precast concrete block 1 for a water gate, a waterway can be constructed by assembling the form 22 of the box 20 which constitutes the waterway of the gutter. That is, it is possible to employ a construction method in which a highly accurate precast product for floodgates is used as a standard dimension.

Although the rectangular box in the gutter has been described above as an example, the present invention can also be applied to other water channels such as agricultural water channels or open channels. Further, the present invention is not limited to the floating gate type concrete blocks for floodgates, and can be applied to the roller gate type or flap gate type floodgate concrete blocks.

[0050]

[Effects of the Invention] (1) Since a precast concrete block for a sluice to which opening and closing door components such as a door stop and a door body are attached on site, a sluice such as a gutter or an agricultural canal is completed. The concrete block can be installed in a short period of time compared to the conventional one, and the construction period and cost can be reduced.

(2) The quality of the concrete and the dimensional accuracy are good, because it is a cast product in the factory, and
The door stop member can also be attached to the block with high accuracy, and a water gate with good quality, dimensional accuracy, watertightness, durability, etc. can be easily obtained.

(3) Since it is not necessary to weld the width stop aid to the side door stop as in the conventional case, distortion due to welding does not occur and the watertightness of the opening / closing door can be sufficiently ensured. Also, the deburring work after removing the width stop auxiliary material is not necessary, and the construction period and cost can be reduced.

(4) It becomes possible to adopt a method of performing formwork assembling work of a waterway box or the like in the next step, using the highly accurate precast concrete block product for a floodgate of the present invention as a reference dimension.

[Brief description of drawings]

1 is an embodiment of a precast concrete block for a floodgate of the present invention, (a) is a front view, (b) is a vertical sectional view, (c) is a horizontal sectional view, and (d) is a perspective view. .

FIG. 2 is a vertical cross-sectional view showing an integral mold used in the present invention, in which (a) shows a case of vertical striking and (b) shows a case of flat striking.

FIG. 3 is a vertical cross-sectional view showing a split mold used in the present invention, in which (a) shows a case of vertical striking and (b) shows a case of flat striking.

FIG. 4 shows a method of fixing the inner formwork and the door stop member used in the present invention, (a) is a vertical sectional view, (b) is a horizontal sectional view, and (c) is a partially enlarged sectional view. It is a figure.

FIG. 5 is a diagram comparing the accuracy control of the gate between the present invention and the prior art.

FIG. 6 shows installation of a precast concrete block for a floodgate according to the present invention, (a) is a front view, and (b) is a view.
Is a side view.

FIG. 7 shows a construction method using the precast concrete block for floodgates of the present invention, (a) is a front view and (b) is a side view.

FIG. 8 is a gate device for a waterway, (a) is a vertical sectional view,
(b) is a front view.

FIG. 9 is a perspective view showing a conventional method (first step) for constructing a concrete block for floodgates.

FIG. 10 is a perspective view showing a construction method (second step) of a conventional concrete block for floodgates.

FIG. 11 is a perspective view showing a conventional method of constructing a concrete block for a floodgate (third step).

FIG. 12 is a perspective view showing a conventional method of constructing a concrete block for a floodgate (fourth step).

FIG. 13 is a perspective view showing a construction method (fifth step) of a conventional concrete block for floodgates.

FIG. 14 is a perspective view showing a construction method (sixth step) of a conventional concrete block for floodgates.

FIG. 15 is a perspective view showing a construction method (seventh step) of a conventional floodgate concrete block.

[Explanation of symbols]

1… Precast concrete block for floodgates 2… Precast concrete block 3 ... Door body 4 ... Waterway 5 ... Door storage space 6 ... Hinge 7 ... Lower door 8 ... Upper door 9 ... Side door stop 10 ... Lower seal member 11 ... Upper sealing member 12 ... Side seal member 13 ... Presser plate 14 ... Bolt 20 ... Hakodate 21 ... Bottom slab concrete 22 ... Formwork 30 ... Formwork foundation 31 ... Inner formwork 32 ... Outer formwork 33 ... Inner formwork 34 ... Edge formwork

Continued front page    (72) Inventor Tetsuro Yoshida             Opened 450-1, Ishikawa, Ueki-machi, Kamoto-gun, Kumamoto             Seisei Co., Ltd. F-term (reference) 2D019 EA03

Claims (6)

[Claims] 1. A concrete block for a floodgate, wherein a concrete block is provided with an opening / closing door, wherein the concrete block is made of a precast product, and the precast concrete block is provided with an opening / closing door constituent member before installation. A concrete block for floodgates. 2. A concrete block for sluices, wherein a concrete block is provided with an opening / closing door, the concrete block is made of a precast product, and the opening / closing door constituent member or a part thereof is incorporated by integral molding when the precast concrete block is manufactured. A concrete block for sluices that is characterized by being 3. A concrete block for sluices, wherein a concrete block is provided with an opening / closing door, and the concrete block comprises a reinforced concrete precast rectangular box or a prestressed concrete precast rectangular box. A concrete block for sluices, characterized in that a door constituent member or a part thereof is integrally molded. 4. The concrete block for a floodgate according to claim 1, 2, or 3, wherein the opening / closing door is
A concrete block for sluices that is supported by a shaft that is tiltable in the flow direction and that is a float system that rises and falls due to buoyancy. 5. The concrete block for a floodgate according to claim 4, wherein the precast concrete block has a lower door stop on which a lower sealing member is pivotally supported by the opening / closing door and an upper sealing member is provided at an upper portion of the opening / closing door. A concrete block for a floodgate, which is provided with an upper door stop that comes into contact with the side door and a side door stop where the side seal members on both sides of the opening / closing door slidably come into contact. 6. The method for manufacturing a concrete block for a floodgate according to claim 5, wherein a lower door stop, an upper door stop and a side door stop are attached to the surface of the inner formwork on the concrete placing side with fasteners. A method for producing a concrete block for a floodgate, which comprises placing concrete between the inner formwork and the outer formwork or the end formwork.