JP2869764B2 - Reservoir construction method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[Industrial application] A construction method of a regulating pond that temporarily stores rainwater flowing into a river and discharges water when the river is reduced.

[0002]

2. Description of the Prior Art As shown in FIG.
FIG. 8 shows a bottom plate 102 and a lid plate 103 joined together.
L-shaped precast block 104 as shown in ▲ b ▼
The one that faces 104 and partitions the boundary between the cover plate 106 and the precast flat plate 105 is used. However, using a precast block has the advantage of shortening the construction period, but has the disadvantage of increasing costs.

[0003] On the other hand, if the whole regulating pond is subsequently cast in place, there is a problem that the construction period becomes extremely long. In particular, when the upper slab is cast in place, a supporting device for supporting the weight of the concrete is required for the formwork, and the formwork must be installed during the curing of the concrete. For this reason, the work process becomes extremely complicated.

[0004]

The object of the present invention is to reduce the construction period of a regulating pond as much as possible and to reduce the cost. And increase the design tolerance of construction.

[0005]

[Technical Means] First Step: As a first step, a girder receiving section 1b is provided at a required place in a regulating pond scheduled area surrounded by a corner outer peripheral block 2 and a straight outer peripheral block 3 , and the upper floor slab is fixed. The rebar 1a is erected, the column 1 having the bottom plate anchoring rebar 1c is erected on the foundation b, and the upper slab is erected between the girder receiving portion 3b of the outer peripheral block 2, 3 and the girder receiving portion 1b of the column 1. The girder 4 on which the anchoring reinforcing bar 4a is planted is suspended. Second step: Cast-in-place concrete 7 is cast on the bottom plate. Third step: The upper floor slab anchoring rebars 2a, 3a, 4a are erected upright on the portion surrounded by the girder 4, the pillar 1, the corner outer peripheral block 2, and the straight outer peripheral block 3. The frame floor slab 8 is placed so that its peripheral edge abuts. Fourth step: By bending the tips of the upper floor slab anchoring reinforcing bars 2a, 3a, 4a,
The upper slab U is formed by casting the cast-in-place concrete 9.

[0006]

[Function] In particular, since the upper slab U is formed by casting the upper slab cast-in-place concrete 9 on the precast slab form 8, the installation process of the form slab is extremely complicated compared to the construction of the upper slab by only the cast-in-place construction. Simplified.

Further, since the pillar 1 has a cross-shaped cross section, sufficient strength can be obtained with a small amount of material, and the upper floor slab fixing steel 1
“a” is effective as reinforcement of the joint of the precast form floor panel 8.

[0008]

EXAMPLES Examples of the method of the present invention will be described below.

First step: First, after excavating the regulating pond portion, the foundation b is constructed (FIG. 7), and the excavated portion is formed by the corner outer peripheral block 2 and the straight portion outer peripheral block 3 as shown in FIG. Box,
Pillar 1 is erected at a predetermined location.

The column 1 has a cross-shaped cross section as shown in FIGS. 1 and 2, and a girder receiving portion 1b is provided at the top. Girder receiving part 1b
An anchoring reinforcing bar 1a for the upper deck is planted upright on the top surface of the slab.

At the lower end of the column 1, as shown in FIG. 3, a fixing reinforcing bar 1c for a bottom plate is implanted in a hole 1d for a reinforcing bar. That is, the pillar 1 is hollow, and the in-use water flows through the hollow section. 1v is a leveling adjustment bolt. Fixing rebars 2a, 3a for the upper deck are erected on the corner outer peripheral block 2 and the straight portion outer peripheral block 3, respectively, and the fixing rebars 2b, 3c for the bottom plate are planted in the horizontal direction. Also, FIG.
As shown in FIG. 4, the linear portion outer peripheral edge block 3 is provided with a girder receiving recess 3b. Next, as shown in FIG. 5, the girder receiving recess 3b of the straight portion outer peripheral edge block 3 and the girder receiving portion 1
Multiply digit 4 between b. In digit 4, as shown in FIG.
An anchoring reinforcing bar 4a for the upper floor slab is planted in an upright state. The girder 4 and the column 1 abut the connecting steel plate 5 from both sides, and the connecting bolt 5
Connect with v.

Second step: As shown in FIG. 4, the cast-in-place concrete 7 is cast with the anchoring rebars 1c, 2b, 3c for the bottom plate incorporated therein.

Third step: Next, as shown in FIG. 5, inside the fixing bars 4a, 1a, 2a, 3a for the upper floor slab, the spar 4, the pillar 1, the corner outer peripheral block 3, and the straight outer peripheral block 2. The form floor slab 8 is placed.

Fourth step: Finally, the anchoring reinforcing bar 1a for the upper slab,
The top of each of 2a, 3a, and 4a is bent from an upright state, and an upper deck slab cast-in-place concrete 9 is cast to construct an upper deck slab U.

FIG. 6 shows a first process, a second process, a third process,
The fourth step is shown in order. FIG. 7 is a cross-sectional view taken along the line f7-f7 in FIG. 6 at the end of the fourth step.

[0016]

【The invention's effect】

(A) When the cast-in-place construction is performed, since the pillar 1, the girder 4, and the upper floor slab 8, which are relatively expensive, are precast, the cost can be significantly reduced compared to the cast-in-place construction.
In particular, since the upper slab U was cast with the upper slab cast-in-place concrete 9 on the precast form slab 8, the construction of the formwork was remarkably simplified, and compared with the construction using only the precast. The design tolerance is expanded.

(B) Since the column 1 has a cross-shaped cross, light weight and high strength can be obtained. In addition, the upper slab fixing reinforcing bar 1a on the top surface of the column 1 serves to reinforce the joint of the slab formwork 8.

[Brief description of the drawings]

FIG. 1 is a top perspective view of a pillar 1,

FIG. 2 is a perspective view of a pillar 1, a corner outer peripheral block 2, a straight outer peripheral block 3, a girder 4, and a connecting steel plate 5,

FIG. 3 is a perspective view of a bottom plate portion of the pillar 1,

FIG. 4 is a plan view of an outer peripheral block before mounting the beam 4;

FIG. 5 is a plan view when the spar 4 is attached and the form floor slab 8 is placed,

FIG. 6 is an overall plan view,

FIG. 7 is a sectional view of FIG. 6f7-f7,

[Fig. 8] ▲ a ▼ Construction example of conventional regulating pond, ▲ b ▼ Other construction example,

[Explanation of Signs] 1: Pillar, 1a: Upper floor slab fixing reinforcing bar, 1b: Girder receiver, 1c:
Bottom plate anchoring bar, 1d: Hole for reinforcing bar, 1v: Leveling adjustment bolt, 2: Corner outer peripheral block, 2a: Top floor anchoring bar, 2b: Bottom plate anchoring bar, 3: Linear outer edge block, 3a: Upper floor slab Anchored reinforcing bar, 3b: girder receiving recess, 3c: bottom plate anchoring bar, 4: girder, 4a: upper deck slab anchoring bar, 5: connecting steel plate, 5v: connecting bolt, 6: formwork floor slab, 7: bottom plate cast-in-place concrete , 8: Formwork slab, 9: Upper slab cast-in-place concrete, U: Upper slab, b: Foundation.

Claims (2)

(57) [Claims] As a first step, a corner outer peripheral block 2 ,
A girder receiving portion 1b is provided at a required place in the planned reservoir area surrounded by the straight portion outer peripheral block 3 and the upper floor slab anchoring bar 1a is erected, and the column 1 having the bottom plate anchoring bar 1c is built on the foundation b. And a girder 4 in which an upright slab fixing steel bar 4a is planted is suspended between the girder receiving portions 3b of the outer peripheral blocks 2 and 3 and the girder receiving portion 1b of the column 1. As a second step, the girder 4 is attached to the bottom plate. The cast-in-place concrete 7 is cast, and as a third step, the upper floor is planted upright on the portion surrounded by the girder 4, the pillar 1, the corner outer peripheral block 2, and the straight outer peripheral block 3. Plate anchoring rebars 2a, 3a,
4a, the formwork slab 8 is placed so that the periphery thereof abuts,
As a fourth step, an upper deck slab U is formed by bending the tips of the upper deck slab anchoring rebars 2a, 3a, 4a and casting the upper deck slab cast-in-place concrete 9. 2. The regulating pond construction method according to claim 1, wherein the pillar 1 has a cross-shaped cross section.