JPH07197510A - Construction of regulating pondage - Google Patents

Abstract

PURPOSE:To shorten the construction period as short as possible, reduce cost and spread the design allowable range in execution, in the construction of a regulating pondage for temporarily storing the rain water which flows into a river and for discharging the rain water at the time point when the water in the river reduces. CONSTITUTION:In the first process, a girder receiving part 1b is formed at a necessary place in a predetermined division for a regulating pondage which is surrounded by an angular part outer peripheral edge block 3 and a straight line part outer peripheral edge block 2, and an upper floor plate fixing steel reinforcement 1a is erected, and a pillar 1 having a bottom plate fixing steel reinforcement 1b is erected on a foundation (b), and a girder 4 on which the erected upper floor fixing steel reinforcement 4a is planted is suspension laid between the girder receiving part 1a of the outer peripheral edge blocks 2 and 3 and the girder receiving part 1b of t he pillar 1. In the second process, the site-placed concrete 7 is placed on the bottom plate, and in the third process, a form floor plate 8 is placed on the upper floor plate fixing steel reinforcements 2a, 3a, and 4a planted in erection at the part surrounded by the girder 4, pillar 1, angular outer peripheral edge block 2, and the straight line part outer peripheral edge block 3. In the fourth process, each top end of the upper floor plate fixing steel reinforcements 2a, 3a and 4a is bent, and the upper floor plate site-placing concrete 9 is placed to form an upper floor plate U.

Description

Detailed Description of the Invention

[0001]

[Industrial application field] A construction method of constructing a regulating pond that temporarily stores rainwater flowing into a river and discharges it when the river runs low.

[0002]

2. Description of the Related Art A conventional regulating pond is a precast box culvert 101, 101 as shown in FIG.
The bottom plate 102 and the lid plate 103 are joined together in FIG.
L-shaped precast block 104 as shown in (b),
There is used a device in which 104 is faced to each other and a boundary between the lid plate 106 and the precast flat plate 105 is partitioned. However, the use of precast blocks has the advantage that the construction period is short, but has the drawback of increasing the cost.

On the other hand, if the whole of the regulating pond is cast in place after this, the construction period becomes extremely long. In particular, when the floor slab is cast in place, a supporting device for supporting the weight of concrete is required for the formwork, and moreover, the formwork must be installed during the concrete curing period. Therefore, the work process becomes extremely complicated.

[0004]

[Problems to be Solved by the Invention] The construction period of a regulating pond should be as short as possible and the cost should be low. And increase the design tolerance of construction.

[0005]

[Technical means]

First step: As the first step, a girder receiving portion 1b is provided at a required position in a regulation reservoir planned area surrounded by the corner outer peripheral block 3 and the straight portion outer peripheral block 2, and the upper deck fixing rebar 1a is erected upright. , The pillar 1 having the bottom plate fixing rebar 1b is built on the foundation b, and the upper floor plate fixing rebar 4a standing upright between the girder receiving portion 1a of the outer peripheral edge blocks 2 and 3 and the girder receiving portion 1b of the pillar 1 is planted. Suspend the set girder 4. Second step: Casting cast-in-place concrete 7 on the bottom plate. Third step: A mold is formed on the upper floor slab fixing rebars 2a, 3a, 4a which are planted upright in 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: The upper floor slab fixing rebars 2a, 3a, 4a are bent at their tips, and the upper floor slab cast-in-place concrete 9 is cast to form the upper floor slab U.

[0006]

In particular, since the upper floor slab U is formed by constructing the upper floor slab cast-in-place concrete 9 on the precast floor slab formwork 8, the process of installing the formwork is extremely difficult as compared with the construction of the upper floor slab by only the cast-in-place construction. To be simplified.

Further, since the pillar 1 has a cross-section of a figure of ten, sufficient strength can be obtained with a small amount of material, and the upper floor plate fixing rebar 1
"a" is effective for reinforcing the joints of the precast formwork floor plate 8.

[0008]

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

First step: First, after excavating the regulating pond portion, a foundation b is constructed (FIG. 7). As shown in FIG. 4, the excavation portion is formed by the corner outer peripheral block 2 and the straight portion outer peripheral block 3. Box,
Pillar 1 is built in a predetermined place.

As shown in FIGS. 1 and 2, the pillar 1 has a cross-section of a ten shape, and a girder receiving portion 1b is provided on the top. The girder receiving part 1b
An anchoring rebar 1a for the upper floor slab is vertically planted on the top surface of the.

Further, at the lower end of the pillar 1, as shown in FIG. 3, a fixing rebar 1c for the bottom plate is planted in a hole 1d for the rebar. That is, the pillar 1 is hollow, and water in use is circulated in the hollow cross section. 1v is a leveling adjustment bolt. In the corner outer peripheral block 2 and the straight outer peripheral block 3, the fixing slabs 2a, 3a for the upper floor slab are upright, and the fixing rebars 2b, 3c for the bottom plate are planted in the horizontal direction. Also, in 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 outer peripheral edge block 3 of the straight portion and the girder receiving portion 1 of the pillar 1 are provided.
Multiply digit 4 between b. In digit 4, as shown in FIG.
The fixing rebar 4a for the upper floor slab is planted while standing upright. The beam 4 and the pillar 1 contact the connecting steel plates 5 from both sides, and the connecting bolts 5
Connect with v.

Second step: As shown in FIG. 4, a bottom plate cast-in-place concrete 7 is placed with the bottom plate fixing rebars 1c, 2b and 3c built therein.

Third step: Next, as shown in FIG. 5, inside the fixing rebars 4a, 1a, 2a, 3a for the upper deck of the girder 4, the pillar 1, the corner outer peripheral block 3, and the straight part outer peripheral block 2. The formwork floor slab 8 is placed.

Fourth step: Finally, the fixing rebar 1a for the upper deck,
The tips of 2a, 3a, and 4a are bent from the upright state, and the floor slab cast-in-place concrete 9 is placed to construct the floor slab U.

FIG. 6 shows the first, second and third steps,
The fourth step is shown step by step. 7 is a sectional view taken along line f7-f7 of FIG. 6 at the end of the fourth step.

[0016]

【The invention's effect】

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

(B) Since the pillar 1 has a dodecagonal cross section, it is lightweight and has high strength. Further, the upper floor plate fixing rebar 1a on the top surface of the pillar 1 serves to reinforce the joint between the floor plate forms 8.

[Brief description of drawings]

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

FIG. 2 is a perspective view of a pillar 1, a corner outer peripheral block 2, a linear 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 edge block portion before mounting the spar 4;

FIG. 5 is a plan view when the girder 4 is likewise mounted and the formwork 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 a conventional regulating pond, ▲ b ▼ Other construction examples,

[Explanation of symbols]

1: Pillars, 1a: Reinforcing steel bars fixed on upper deck, 1b: Girder receiving part, 1c:
Bottom plate fixing rebar, 1d: Reinforcing hole, 1v: Leveling adjustment bolt, 2: Corner outer peripheral block, 2a: Upper plate fixing rebar, 2b: Bottom plate fixing rebar, 3: Straight part outer peripheral block, 3a: Upper plate Fixing rebar, 3b: Girder receiving recess, 3c: Bottom plate fixing rebar, 4: Girder, 4a: Upper plate fixing rebar, 5: Connection steel plate, 5v: Connection bolt, 6: Formwork floor slab, 7: Bottom plate cast concrete , 8: formwork floor slab, 9: upper floor slab cast concrete, U: upper floor slab, b: foundation.

Claims (2)

[Claims] 1. A corner outer peripheral block 3, as a first step,
A column 1 having a girder receiving portion 1b at a required position, an upper deck slab fixing rebar 1a standing upright, and a bottom plate fixing rebar 1b is built on a foundation b within a planned adjustment pond area surrounded by a straight portion outer peripheral block 2. Then, the girder 4 having the upright slab fixing rebar 4a planted upright is suspended between the girder receiving portions 1a of the outer peripheral edge blocks 2 and 3 and the girder receiving portion 1b of the pillar 1 to suspend the girder 4 on the bottom plate as the second step. A cast-in-place concrete 7 is cast, and as a third step, an upper floor is planted upright in a portion surrounded by the girder 4, the column 1, the corner outer peripheral block 2, and the straight portion outer peripheral block 3. Plate fixing rebar 2a, 3a,
Place the formwork floor slab 8 on 4a so that its peripheral edge abuts,
As a fourth step, the adjustment pond construction method is characterized in that the upper floor slab fixing rebars 2a, 3a, 4a are bent at their tips and the upper floor slab cast-in-place concrete 9 is cast to form the upper floor slab U. 2. The adjusting pond construction method according to claim 1, wherein the pillar 1 has a dodecagonal cross section.