JPH0788683B2 - Construction method of waterway and concrete gate-shaped waterway block used for it - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for constructing a water channel using a concrete gate-shaped water channel block in which lower portions between side walls are opened and a concrete gate-shaped water channel block used for the method. It is a thing.

[0002]

2. Description of the Related Art In the conventional construction for constructing a water channel by using a concrete gate-shaped water channel block whose lower portions between side walls are open, the gate-shaped water channel block is simply placed on a foundation concrete to mutually support each other. It was common to connect.

However, when the construction is carried out in this manner, since the lower portion of the gate-shaped waterway block is in an open state, in other words, both side walls have a cantilever structure, the bottom concrete is poured. At that time, both side walls tended to expand outward due to the driving pressure, which forcedly deformed the gate-shaped waterway block, possibly leading to a decrease in the strength of the waterway. In addition, the side wall is likely to expand outward due to the traveling load when the vehicle travels vertically or crosses the upper part of the constructed waterway, and the strength of the waterway formed from this side is also seriously reduced.

A method disclosed in Japanese Patent Publication No. 63-65784 has been proposed as a method for solving such problems. The method is to mount a concrete gate-shaped waterway block, in which the members to be welded are exposed on the inside of the lower part of the opposite side walls, on the concrete foundation, and then join the reinforcing bars and gates that are planted in the foundation concrete. The members to be welded of the water channel block were connected by welding to integrate the lower end of the side wall with the basic concrete to form a box culvert.

[0005]

However, the above-mentioned construction method has various problems as follows. Since the welding work at the construction site was indispensable, the ground position had to be changed for each member to be welded, which required a lot of time and effort for the welding work, resulting in a decrease in the construction efficiency. In particular, under a work environment with wind and rain, the welding conditions became more severe, and it was difficult to perform the welding work properly.
In addition, there is a big problem in terms of working environment and safety, because the work under rain always causes an electric shock.

In addition, since the method requires welding with many restrictions as field work in this way, it is unavoidable to limit the welding points, and as disclosed in the above publication, the welding points are two points at both end portions of the side wall. Can be considered at best. Therefore, the middle part of the side wall is not integrated with the foundation concrete, and the structure is obviously different from the box culvert in which the four rims are integrally formed. Therefore, in the water channel constructed in this way, there was concern about the strength in terms of preventing the side wall from expanding and deforming.

Further, in this method, since the lower side wall portions are connected to each other through the foundation concrete, the joint strength between the lower side wall portions depends on the strength of the foundation concrete and the joint strength of the foundation concrete and the joint rebar. Will result. Therefore, it is often difficult to secure the reliability of the connection because it is often necessary to make the basic concrete a reinforced concrete structure, or it is necessary to take measures to firmly integrate the jointed reinforcing bar and the basic concrete. It was

[0008] Further, in this construction method, regarding the connection between the gate-shaped waterway blocks, the lower parts thereof are connected via the foundation concrete. Therefore, the connection strength between the lower parts of the blocks depends on the strength of the base concrete and the strength of the connection between the base concrete and the joint rebar as in the case described above. Therefore, more preferably, a simple structure for directly connecting the lower parts of the portal water channel block is required.

An object of the present invention is to provide a method for constructing a water channel that can solve such problems and a concrete gate-shaped water channel block used for the method.

[0010]

To solve the above problems, the present invention employs the following means. That is, the construction method of a water channel according to the present invention (hereinafter referred to as the construction method) has a gate shape in which upper portions of the opposite side walls 2 and 2 are connected to each other and a lower portion between the side walls is in an open state. , 2 are attached to the inner surfaces of the lower end portions of the sidewalls 6 and 6 over substantially the entire length of the side wall by facing and bolted, and lateral ribs 14 and 1 arranged side by side.
4 uses a concrete portal water channel block 1 in which a base end side portion 17 of an overhanging mesh 16 formed by connecting four to each other with vertical bars 15 is fixed to the mounting member 6, and the portal water channel block 1 After installing 1 on the foundation concrete 32, both side portions 40, 40 of the connecting mesh 39 formed by assembling the horizontal stirrup 36 and the vertical stirrup 37 in a grid pattern are overlapped with the overhanging meshes 16, 16 facing each other. The side portion 40 and the overhanging mesh 16 are integrated by a non-welding means, and then a bottom concrete is cast in the lower portion of the portal water channel block so as to cover the entire mounting member 6, overhanging mesh 16 and connecting mesh 39. It is characterized by doing.

In the construction method according to the present invention, the opposing overhanging meshes 16, 1 are related to the portal water channel blocks to be connected.
It is preferable that the end portions 42, 42 of the connecting meshes 39, 39 connecting the six members are overlapped with each other, and the overlapping portions are integrated by non-welding means.

Further, the concrete portal water channel block 1 according to the present invention has a portal shape in which upper portions of opposing side walls 2 and 2 are connected to each other and a lower portion between the side walls is opened.
On the inner surfaces of the lower end portions of the side walls 2 and 2, mounting members 6 and 6 over substantially the entire length of the side walls are opposed and fixed by bolts.
The proximal end portion 17 of the overhanging mesh 16 formed by connecting the horizontal bars 14, 14 arranged in parallel with each other by the vertical bar 15 is the attachment member 6.
It is characterized by being fixed to.

In the portal water channel block 1, the mounting member 6 is as follows, that is, a bolt having a length substantially extending over the entire length of the side wall, abutting on the inner surface of the side wall, and arranged in parallel in the longitudinal direction. It is preferable to form an angle member composed of a vertical piece 10 fixed to the inner surface of the side wall with a bolt inserted through the hole 9 and a horizontal piece 11 horizontally projecting inward at the lower end thereof. Then, the overhanging mesh 16 has a proximal end portion 1 thereof.
7 may be welded to the horizontal piece 11.

[0014]

According to the present invention, since the side walls 2 and 2 are connected to each other by the integrated body of the mounting member 6, the overhanging mesh 16 and the connecting mesh 39, both side walls are poured when the bottom concrete is poured. It is possible to reliably prevent the possibility of spreading outward due to pressure. Further, after the bottom concrete is hardened, it is possible to reliably prevent the side wall from spreading outward due to the load applied to the upper part of the water channel. Particularly, regarding the gate-shaped waterway block to be connected, the end-side portion 4 of the connecting mesh 39, 39 that connects the opposing overhanging meshes 16, 16 to each other.
When the layers 2 and 42 are overlapped with each other to integrate the overlapped portions, the bottom plate formed in the lower part of the water channel can also function as a connecting member that firmly connects the blocks to each other.

[0015]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 are explanatory views for explaining a portal water channel block 1 used in the present invention, in which upper portions of both ends of opposing side walls 2 and 2 are integrally connected by connecting beams 3 and a lower portion between both side walls. 5 has an open gate shape, and mounting members 6 and 6 are fixed to the inner surfaces of the lower end portions of the side walls 2 and 2 so as to face each other over substantially the entire length thereof.

As shown in FIGS. 3 and 6, the mounting member 6 has a length that extends over substantially the entire length of the side wall and contacts the inner surface 7 of the side wall, and the bolt hole 9 (FIG. 6) in the length direction. Is formed by an angle member composed of a vertical piece 10 arranged side by side and a horizontal piece 11 horizontally projecting inward at the lower end thereof, and the bolt hole 9 of the vertical piece 10 is inserted therethrough. The bolt 12 is fixed to the inner surface of the side wall by screwing the bolt 12 into the insert 13 embedded in the inner surface of the lower end portion of the side wall. And on the upper surface of the horizontal piece 11 of the angle member,
A lateral end 14 of a lateral mesh of an overhanging mesh 16 formed by connecting lateral bars 14, 14 arranged in parallel with each other by a longitudinal bar 15 is welded. The mounting member 6 is bolted at a factory or at a construction site.

In particular, in this embodiment, the inner surfaces of the lower end portions of the side walls 2 and 2 are located directly below the angle member, and as shown in FIG. 3, the concave portions extending continuously in the longitudinal direction of the side wall. A groove 19 is formed, and a band-shaped watertight material 20 made of a material having a restoring property such as butyl rubber is attached over the entire length of the bottom surface of the groove 19, and a tip surface 21 of the watertight material 20 is attached.
Are set to be substantially flush with the inner wall surface 7. Also, as shown in FIGS. 1 and 2, a connection box body 25, which is open outward and has a bolt hole 23 at one end face portion 22, is provided above and below the end portions of the side walls 2 and 2, and the end face 22 is blocked. End face 2
It is buried so that it is exposed flush with 6. Further, as shown in FIG. 2, the upper opening 27 formed between the connecting beams 3 and 3 is closed by a lid plate 29. When the gate-shaped waterway block is large, an opening / closing opening 31 that can be closed by the lid 30 may be provided in the lid plate 29.

The gate-shaped waterway block 1 having such a structure
As shown in FIG. 4, the base concrete 32 formed at the bottom of the excavation groove is sequentially installed with its ends abutted against each other. As shown in FIG. 2, the gate-shaped waterway blocks thus installed are connected to each other by connecting the elastic water-stopping material to the connecting end surfaces of the connecting boxes 25, 25 so that the bolts 33 can be inserted through the bolt holes 23. The nuts 35 are connected to each other by screwing the nuts 35 onto both end portions and tightening them. After that, Figure 1,
As shown in FIG. 3 and FIG. 4, both side portions 40, 40 of the connecting mesh 39 in which the horizontal stripes 36 and the vertical stripes 37 are assembled in a lattice form
The side portions 40 and the overhanging mesh 16 are superposed on the overhanging meshes 16, 16 which are opposed to each other, and are united by a non-welding means, for example, by binding 41 using a binding wire.

The connecting mesh 39 integrated with the opposing overhanging meshes 16 and 16 relates to the portal water channel blocks 1 and 1 to be connected, and as shown in FIG.
It is better to superimpose the two on top of each other and to integrate the overlap by non-welding means.

After that, as shown in FIG. 4, a bottom concrete 43 is cast on the lower portion of the portal water channel block 1 with a required covering so as to cover the whole of the mounting member 6, the overhanging mesh 16 and the connecting mesh 39. Then, the waterway is constructed.

In the thus constructed water channel, the lower end portions of the side walls of the gate-shaped water channel block are connected by the bottom slab 45 of the reinforced concrete structure over the entire length due to hardening of the bottom concrete. This structure is similar to the structure of the box culvert in which the four circumferences are integrally formed, and it is possible to prevent the side wall from expanding outward due to the load applied to the upper part of the water channel.

Particularly, in this embodiment, regarding the portal water channel block to be connected, the portion 42 on the end side of the connection mesh,
42 The bottom plate 45 formed by the mutual integration
Also effectively functions as a connecting member for connecting the gate-shaped waterway blocks 1, 1 to each other.

Further, in this embodiment, the watertight material 20 is elastically compressed as shown in FIG. 6 by the pouring pressure of the bottom concrete. Therefore, the bottom concrete 43
When cured, the watertight material 20 buried in an elastically compressed state restores permanently the good adhesion between the watertight material tip surface 21 and the concrete surface 46, effectively preventing water leakage from the bottom of the waterway. The Rukoto.

Other Embodiments In the construction method according to the present invention, when the length of the overhanging mesh is appropriately set according to the lateral width of the gated waterway block so as to obtain the required fixing length, it is the same as the connecting mesh. A standard one can be used.

The mounting member fixed to the inner surface of the side wall is
It is only necessary to have a fixing portion for fixing the mounting portion to the side wall and the base end side portion of the overhanging mesh, and it is not limited to the angle-shaped one shown in the above-mentioned embodiment, but has a rectangular tubular shape. May be The attachment member may be attached over substantially the entire length of the side wall, and it may be one in which the divided bodies are attached in a continuous state.

The means for unifying the side portion of the connecting mesh and the overhanging mesh by the non-welding means may be a clip fastening means, an adhering means or the like in addition to the binding by the binding wire.

[0027]

The present invention has the following excellent effects. In the construction method according to the present invention, non-welding means such as binding means and clip fastening means are adopted as means for integrating the connecting mesh and the overhanging mesh. for that reason,
Compared to the conventional construction that requires welding work at the construction site, the construction can be facilitated and the construction safety can be improved to improve the working environment.

According to the construction method of the present invention, it is possible to surely prevent the side walls from spreading outward due to the driving pressure when the bottom concrete is poured. Further, by the bottom plate made of reinforced concrete formed by hardening of the bottom concrete, the lower end portions of the side walls of the block body are connected to each other over the entire length, and the constructed water channel has a box culvert structure as a whole. Therefore, compared with the conventional method in which only a part of the side wall is integrated with the basic concrete, it is possible to more reliably prevent the side wall from spreading outward due to the load applied to the upper part of the water channel, and to improve the strength of the water channel. Can be achieved.

In particular, regarding the portal water channel block to be connected, when the end portions of the connecting mesh integrated with the overhanging mesh are in an overlapping state and the overlapping portions are integrated by non-welding means, the water channel The bottom slab formed in the lower part can effectively function also as a connecting member that directly connects the lower end parts of the blocks, and the strength stability of the water channel can be further improved.

Since the portal water channel block according to the present invention adopts a configuration in which the mounting member is fixed to the inner surface of the lower end portion of the side wall of the block body by bolts, by embedding the insert in a predetermined position on the side wall, the factory Alternatively, at the construction site, the mounting member having the selected overhanging mesh can be easily bolted to the inner surface of the side wall.

The gate-shaped waterway block is installed on the concrete foundation, and the overhanging mesh projecting to face the inner surface of the side wall is integrated with the connecting mesh, whereby the attaching member and the overhanging mesh are formed. The integrated parts of the connecting mesh can connect the lower end portions of the side walls to each other.
Therefore, at the time of pouring the bottom concrete, it is possible to reliably prevent the side walls from spreading outward due to the pouring pressure.
Further, the bottom plate made of reinforced concrete formed by hardening of the bottom concrete can surely prevent the side wall from spreading outward due to the load applied to the upper portion of the water channel.

[Brief description of drawings]

FIG. 1 is a partially cutaway perspective view showing a gate type waterway block according to the present invention.

FIG. 2 is a partial perspective view illustrating a connected state of the gate type waterway blocks.

FIG. 3 is a perspective view illustrating a state in which an overhanging mesh protruding at a lower end of a side wall of a gate-type water channel block installed on a foundation concrete and a side portion of a connecting mesh are bound together.

FIG. 4 is a cross-sectional view illustrating a state in which bottom mesh is placed by connecting opposing meshes at the lower end of the side wall of a gate-type waterway block installed on basic concrete with a connection mesh.

FIG. 5 is an explanatory diagram illustrating a state in which parts on the end side of the connection mesh are overlapped with each other regarding the gate-type water channel block to be connected.

FIG. 6 is a cross-sectional view showing how the bottom concrete is poured at the lower end portion of one side wall of the gate-type waterway block.

[Explanation of symbols]

 1 Gate type waterway block 2 Side wall 5 Lower part between side walls 6 Mounting member 9 Bolt hole 10 Vertical piece 11 Horizontal piece 12 Bolt 14 Horizontal bar 15 Vertical bar 16 Overhanging mesh 17 Base end part of overhanging mesh 32 Basic concrete 36 Horizontal bar 37 Vertical stripe 39 Connected mesh 40 Side part of connected mesh 42 End part of connected mesh

Claims (4)

[Claims] 1. A gate shape in which upper portions of opposed side walls 2 and 2 are connected to each other and a lower portion between the side walls is opened.
On the inner surfaces of the lower end portions of the side walls 2 and 2, mounting members 6 and 6 over substantially the entire length of the side walls are opposed and fixed by bolts.
The proximal end portion 17 of the overhanging mesh 16 formed by connecting the horizontal bars 14, 14 arranged in parallel with each other by the vertical bar 15 is the attachment member 6.
Concrete portal block 1 fixed to the
After the gate-shaped waterway block 1 is installed on the foundation concrete 32, both side portions 40, 40 of the connecting mesh 39 formed by assembling the horizontal bars 36 and the vertical bars 37 in a grid pattern are arranged to face each other. 16 and 16, the side portion 40 and the overhanging mesh 16 are integrated by non-welding means, and then the mounting member 6, the overhanging mesh 16 and the connecting mesh 39 are entirely covered to form a portal channel block. A construction method for a waterway characterized by placing concrete at the bottom of the floor. 2. With regard to the portal water channel block to be connected, the end side portions 42, 42 of the connecting meshes 39, 39 connecting the opposing overhanging meshes 16, 16 are made to overlap each other,
The method for constructing a water channel according to claim 1, wherein the overlapping portion is integrated by non-welding means. 3. A gate shape in which upper portions of opposite side walls 2 and 2 are connected to each other and a lower portion between the side walls is opened.
On the inner surfaces of the lower end portions of the side walls 2 and 2, mounting members 6 and 6 over substantially the entire length of the side walls are opposed and fixed by bolts.
The proximal end portion 17 of the overhanging mesh 16 formed by connecting the horizontal bars 14, 14 arranged in parallel with each other by the vertical bar 15 is the attachment member 6.
Concrete gate-shaped waterway block characterized by being fixed to. 4. The mounting member 6 has a bolt 12 having a length extending over substantially the entire length of the side wall, capable of abutting against the inner surface of the side wall, and having a bolt 12 inserted through the bolt holes 9 arranged in the longitudinal direction. The overhanging mesh 16 is formed by an angle member including a vertical piece 10 fixed to the inner surface of the side wall and a horizontal piece 11 horizontally projecting inward at the lower end thereof, and the overhanging mesh 16 is formed by juxtaposed horizontal bars. 4. The concrete portal water channel block according to claim 3, wherein the base end side portion 17 of which 14, 14 are connected to each other by a vertical bar 15 is welded to the horizontal piece 11.