JP2645644B2 - Reinforcing method of submerged concrete subassembly for large concrete structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reinforcing structure for submerging a large concrete structure into a rectangular frame when viewed from above to form an underground parking lot, etc. The present invention relates to a method of reinforcing a submerged box so as to withstand it without increasing the thickness.

[0002]

2. Description of the Related Art Conventionally, in order to form a large parking lot or the like underground, a large concrete concrete assembly structure having a square frame shape in plan view and consisting of several steps above and below has been assembled on the ground, and this has been assembled using a latent box construction method. The submarine is being set up.

[0003]

When submerging the submersible container, a large load and earth pressure are applied to the side wall of the assembled structure, and this tendency appears as the bending moment increases as the size of the substructure increases. And endure it.

[0004] However, when the bottom slab concrete is poured after the submersion slab is laid, a large portion of the load and the like is borne by the bottom slab concrete. Therefore, it is necessary to increase the thickness of the side wall only during the submersion of the slab. There is a problem in that the material is unnecessarily excessively thick after being sunk, causing waste of material.

[0005]

SUMMARY OF THE INVENTION According to the present invention, at the time of submersion of a large concrete assembly structure which is assembled and formed in a rectangular frame shape in plan view, the inner surfaces of two opposing side walls or the entire peripheral wall of the large assembly structure. A plurality of vertical beams are detachably attached at intervals, and a horizontal beam having a jack between the opposed vertical beams and capable of adjusting tension is freely detachable, and one or more beams are stretched one by one. An object of the present invention is to solve such a problem by reinforcing the side wall of a large-sized assembly structure without increasing the thickness thereof so as to withstand the submersion of the submersible box.

[0006]

According to the present invention, it is possible to assemble a concrete large assembly structure in which a concrete side wall member to be sectioned and formed on the ground is a square frame shape in plan view and has a plurality of upper and lower steps, and a vertical beam can be removed from the inner surface of the relative side wall to be reinforced. And one or more cross beams with jacks are stretched one by one between the vertical beams to reinforce the side wall members. Remove the horizontal and vertical beams.

[0007]

An embodiment will be described below with reference to the drawings.

FIG. 1 is a plan view showing an example of assembling a large concrete structure 1 having a horizontal rectangular frame shape and consisting of several upper and lower stages on the ground, and a unit side wall member formed of two to four divided bodies is shown in FIG. The connection and assembling are performed in the manner of connection using PC steel and bolts.

A bolt receiving fitting 2 having an inner surface opening is formed in advance at a predetermined position of the unit sidewall members 1a and 1b on the longitudinal side, and an H-shaped steel type vertical beam 3 is fixedly attached by a bolt 4. As shown in FIG. 2, it is possible to select whether the vertical beam 3 is attached to each step or to be continuously attached across the steps.

Next, as shown in FIGS. 3 and 4, an H-shaped steel cross beam 6 with a jack 5 is stretched between upper and lower vertical beams 3 in several stages. In stretching, the jack 5 is expanded and contracted to adjust the tension. Although not shown, a bolt 4 is provided between the horizontal beam 6 and the vertical beam 3 to prevent the horizontal beam 6 from shifting.
It may be stopped or provided with a support member for receiving the horizontal beam 6 on the vertical beam 3.

After the cross beam 6 is stretched, the large-scale concrete structure is sunk under the ground sequentially from the bottom.

When the submersion is completed, the concrete bottom slab 7 is cast inside the lower part of the lower tier as shown in FIG. 5, and after the concrete bottom slab 7 is hardened, the horizontal beam 6 and the vertical beam 3 are removed in this order. is there. The cross beams 6 and the vertical beams 3 can be used repeatedly when submerging another assembly structure.

FIGS. 6 (a) and 6 (b) show that the vertical beam 3 and the horizontal beam 6 are hinged to each other.
5 shows an example in which the unit is assembled by folding and unfolding freely by using. At the time of attachment, the space between the vertical beams 3 is expanded and extended, and the longitudinal beams 3 are brought into contact with the inner surface of the side wall to be fixed by bolts 4. The horizontal beam 6 is immediately stretched between the vertical beams 3 by deployment. Fine adjustment of the distance between the vertical beams 3 and the horizontal beams 6
Is adjusted by adjusting the expansion and contraction of the jack 5.

Conventionally, for example, in an assembled structure having a longitudinal inner width of 15450 mm and a lateral inner width of 5500 mm as a size capable of accommodating six automobiles side by side, reinforcement is provided at an intermediate portion between the longitudinal side unit side wall members 1a and 1b. Even with a partition that doubles as
The unit side wall members on the long side and the short side require a thickness of 530 mm and the unit side wall members on the short side have a thickness of 500 mm. The thickness is sufficiently durable, and the structure can be freely used as widely as possible in the structure because the existence of the partition wall also serving as reinforcement is not required.

[0015]

As described above, according to the present invention, one or a plurality of vertical beams are provided on the inner surface of the side wall when a large concrete construction structure is submerged to form a large parking lot or the like underground. Since it is detachably mounted and the transverse beam with jack is detachably stretched between the longitudinal beams in several vertical steps, there is an effect that the strength corresponding to the bending moment can be sufficiently obtained without increasing the thickness of the side wall. .

Further, since the tension of the horizontal beam is distributed in the vertical direction by the vertical beam, the side wall supported by the beam has an effect that a portion having a large bending moment is uniformly reinforced and reinforced.

As a result, there is an effect that the amount of concrete used in forming the side wall can be reduced to reduce waste of material, and the weight can be reduced to reduce the load during transportation and hanging work. .

Since the bolt receiving bracket for attaching the vertical beam is previously formed at a predetermined position inside the side wall,
At the assembly site, there is an effect that the vertical beam can be easily and reliably mounted without determining the mounting position of the vertical beam.

When the vertical beam and the horizontal beam are united in a folded and unfolded form and assembled and formed, there is an effect that attachment and detachment to the side wall can be performed more easily.

Since the jack is attached to the cross beam, the tension can be freely adjusted by expanding and contracting the jack.

The vertical beam and the horizontal beam can be removed and used again after the submerged box is laid, so that the vertical beam and the horizontal beam can be used repeatedly.

[Brief description of the drawings]

FIG. 1 is a plan view showing an example of assembling a large-scale concrete structure (an example of division).

FIG. 2 is a cross-sectional view of an assembled structure in which two stages are stacked. The left side of the drawing shows a state in which a vertical beam and a horizontal beam are attached to each stage,
The right side of the drawing shows the bolt receiving bracket before mounting.

FIG. 3 is a plan view showing a state where a vertical beam and a horizontal beam are stretched.

FIG. 4 is a partial perspective view of the same.

FIG. 5 is a partial sectional view showing an example of placing a concrete bottom slab.

FIGS. 6A and 6B are cross-sectional views showing an example in which a vertical beam and a horizontal beam are unitized by hinge fittings, wherein FIG.

[Explanation of symbols]

 1 is a large-scale concrete structure 1a, 1b is a unit side wall member 2 is a bolt receiving bracket 3 is a vertical beam 4 is a bolt 5 is a jack 6 is a horizontal beam 7 is a concrete bottom plate 8 is a hinge bracket

Claims (3)

(57) [Claims] At the time of submersion of a large concrete structure to be assembled and formed into a rectangular frame shape in plan view, a plurality of concrete structures are spaced apart from each other on the inner surface of two opposing side walls or the inner surface of the entire peripheral wall of the large structure. The vertical beams are detachably attached, and one or a plurality of horizontal beams having jacks between the opposed vertical beams and capable of adjusting the tension pressure are detachably stretched one by one, and the side walls of the large assembly structure are attached. A method of reinforcing a large-scale concrete structure at the time of submersion of a submersible container, wherein the reinforcement is performed without increasing the thickness to withstand the submersion of the submersion. 2. The reinforcing method according to claim 1, wherein a bolt receiving fitting for attaching a vertical beam is inserted into a side wall of the large-scale concrete assembly structure, and the vertical beam is bolted and attached using the bolt receiving fitting. 3. The two vertical beams and one or more cross beams with jacks are formed into a unit so as to be foldable and expandable using hinges, and are fitted and mounted between the side walls of the large assembly structure. The reinforcement method described.