JPH11241348A - Temporary closing structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a temporary closing structure which can be installed to a specified position of foundation concrete, in which a necessary space to a column body can be secured without widely enclosing as in case of using steel sheet piles, and in which problems of traffic control like that in construction of the steel sheet piles, or vibration or noise can be eliminated by providing a temporary closing member provided with seal members to form water tightness at junction parts between box members and junction parts to the column body. SOLUTION: A temporary closing structure comprises a box body comprising side plates 2 to surround a column body P such as a pier and a bottom plate 3 to be jointed with circumferential wall surfaces of the column body P, and parted into plural box members on which folded ribs are formed at junction parts between the box members and at junction parts to the column body P, and seal members to form water tightness are provided at rib junction surfaces. By thus forming the temporary closing structure of the plural box members on the circumferential wall surfaces of the column body P, an enclosing range can be smaller. Problems of traffic control in case of using steel sheet piles, or vibraiton or noise can thus be eliminated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a temporary deadline for preventing water from flowing into a construction site when performing work for reinforcing or repairing pillars such as piers of bridges installed in rivers, lakes and the like. Regarding the structure.

[0002]

2. Description of the Related Art Concrete structures, such as bridge structures, are damaged over time and by weathering, so that repairs and reinforcements are required. The piers of bridge structures installed in rivers, lakes, etc., are partly submerged in water, and are therefore particularly exposed to severe environmental conditions, and the need for them is very large.

[0003] Generally, when repairing or reinforcing a submerged portion of a pier or in the vicinity thereof, a temporary closing structure is provided to prevent water from flowing into the construction site and to prevent the inflow of water. Will be installed.

[0004] The temporary closing structure is usually formed by a steel sheet pile method. This steel sheet pile construction method is a structure in which a sheet body called a steel sheet pile is stretched around the foundation concrete of the pier in a watertight manner, and the outside and inside of the steel sheet pile are cut off and temporarily closed. It is a method of removing the water inside after installation and securing a construction site for work.

[0005]

However, this structure using steel sheet piles is a structure in which the steel sheet piles are installed by burying a part of them in the ground around the foundation concrete of the pier. There is a problem that it is necessary to enclose an area and a height larger than the required construction site space.

Therefore, the width of the route of a ship or the like is reduced, and in some cases, the passage of the ship or the like is hindered.
In addition, there are also traffic regulations during construction of steel sheet piles, vibration and noise.

Further, the steel sheet pile used is large in size, inconvenient to transport, and uses a large amount of steel.
Because it is expensive and, moreover, steel sheet pile, it is expensive to repair for the next use and has economic disadvantages.

[0008]

SUMMARY OF THE INVENTION The present invention solves these problems by providing a box-like body comprising a side plate surrounding a columnar body and keeping a space between the columnar body and a bottom plate joined to the peripheral wall surface of the columnar body. Is formed by forming a folded rib at the joint between the box pieces and the joint with the columnar body having a shape obtained by dividing the box into a plurality of pieces, and including a sealing material on the joint surface of the rib to make the joint watertight. A box-shaped body by joining a plurality of the closing members to the peripheral wall surface of the columnar body by joining the bottom plate through the joining surface of the ribs, and joining and tightening the side plate and the side plate, and the bottom plate and the bottom plate through the respective ribs. And providing a temporary closing structure characterized by surrounding the columnar body.

[0009]

Next, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a schematic perspective view of a temporary closing structure of the present invention, FIG. 2 is a schematic plan view showing a positional relationship between a box piece and a columnar body, FIG. 3 is a schematic perspective view of a pair of box pieces, FIG.
FIG. 5 is a detailed perspective view of one of the box pieces, FIG.
FIG. 4 is a view on arrow B in FIG. 3 at the time of assembling the box piece.

As shown in FIG. 2, the box piece 1 surrounds a pillar P which is a pier, and a side plate 2 made of a steel plate having a shape conforming to the shape of the pillar P which maintains a space between the pillar P. And columnar body P
And a bottom plate 3 made of a steel plate joined to the peripheral wall surface of the box-shaped body, and has a shape as if a box-like body was divided into four parts.

A joint between box pieces of the box piece 1 and a joint between the column members P, that is, a joint between the side plates 2 and 2, a joint between the bottom plates 3 and 3, and a joint between the bottom plate 3 and the column members P Figure 3
As shown in the figure, the folded ribs 4, 5a and 5b are formed on the inner side, and the folded ribs 6a and 6b are formed on the outer side of the joint between the side plates 2 and the upper side. Here, the ribs 6a and 6b are for reinforcing the side plate 2 provided as needed.

As shown in FIG. 4, bolt insertion holes 7 are formed in the ribs 4 and 6b formed on the side plate 2 of the box piece 1 and the rib 5a formed on the bottom plate 3 so that the box pieces 1 are connected to each other. As shown in FIG. 5, two strips of a band-shaped sealing material 8 for maintaining watertightness when the box pieces 1 are joined together are attached to the joining surfaces of the ribs 4, 5a, and 6b, which are joining portions. As shown in FIG. 6, the rib 5b, which is the joining surface of the bottom plate 3 to the columnar body P,
The sealing material 8 which keeps watertight with the above is double-sticked. The rib 5b has no bolt insertion hole.

Here, as the sealing material 8, natural rubber, synthetic resin foam or the like can be used, and it is not particularly limited, but a water-expandable sponge rubber is particularly preferable. Water-expanded sponge rubber has the property of gradually expanding over a long period of time when it comes into contact with water. However, since the water-expanded sponge rubber is expensive, it is economically burdensome to use the whole surface of the joint surface, so that a sealing material 8 as shown in FIG. 7 is preferably used.

In the sealing member 8 shown in FIG. 7, a groove having a concave section in the longitudinal direction is formed at the center in the width direction of the natural sponge rubber 8a of a single cell, and the water-expanded sponge rubber 8b is fitted into this groove. , As a whole.

FIGS. 8 and 9 show a state in which the sealing material 8 is adhered to the ribs. In FIG. 8, a sealing material 8 composed of natural sponge rubber 8a and water-expanded sponge rubber
Are ribs 4 and 6 as joining surfaces of box pieces of the side plate 2.
9b, the sealing member 8 is attached to the rib 5a as a joining surface between the box pieces of the bottom plate 3 in the longitudinal direction, and the sealing material 8 is also attached to the joining surface of the bottom plate 3 to the columnar body P in FIG. Is attached laterally to the rib 5b.

When the sealing material 8 is used, as will be described later, the box piece 1 is tightened at the time of assembling as a temporary closing member, so that the water-expandable sponge rubber expands in water, so that a further tightening force is exerted and the joining is performed. The water density of the part is improved.

As described above, a temporary closing member made of a box piece is formed as a whole.

Next, a temporary closing structure using a temporary closing member will be described.

As shown in FIG. 1, the assembling procedure is as follows. A temporary closing member 10 having a four-part shape is positioned at a predetermined position above the foundation concrete PF of the columnar body P which is an existing pier to be reinforced or repaired. Each bottom plate 3 is connected to a columnar body P
The rib 5b shown in the above-mentioned figure is joined to the wall surface of the above through a joining surface to which the sealing material 8 is adhered, and the respective side plates 2 and 2 and the bottom plate 3 and the bottom plate 3 are shown in FIG. As described above, the adjacent ribs 4 and 4 and the ribs 5a and 5a are joined via the joint surface to which the sealing material 8 is adhered, and as shown in FIGS. 5, 6, 8, and 9, This is performed by inserting bolts 9 into bolt insertion holes 7 formed in the ribs and tightening them. Instead of using a bolt, the fastening may be performed by winding the outer periphery into a headband shape with a band-shaped body and tightening the band-shaped body.

After the completion of the assembling operation, the water inside is removed and a box-shaped space is secured as in the case of the steel sheet pile.
A temporary deadline structure is formed.

Although the above-described embodiment is directed to a case where the columnar body is a quadrangular prism, the present invention is, of course, applicable to columnar bodies having other shapes. Incidentally, when the columnar body is a cylinder, as shown in FIG. 1, the shape of the box piece 1 is adjusted to the shape of the columnar body P, and in particular, the joining surface of the columnar body of the bottom plate 3 to P is formed by the columnar body P. Can be handled by forming the shape along the peripheral wall surface.

[0023]

According to the present invention, there is provided a box piece having a shape obtained by dividing a box-like body consisting of a side plate surrounding a columnar body and keeping a space between the columnar body and a bottom plate joined by a peripheral wall surface of the columnar body. The temporary closing member, which is provided with a sealing material that makes the joint between the box pieces and the joint with the columnar body watertight, forms the temporary closing structure, and has the following effects.

Since the temporary closing structure can be installed at a predetermined position on the upper part of the foundation concrete, a necessary space between the temporary closing structure and the columnar body can be ensured without enclosing the steel sheet pile widely. .

Therefore, the channel width in rivers and the like is
It does not become narrower than when steel sheet piles are used, and does not hinder the traffic of ships.

In addition, since the steel sheet pile does not need to be widely enclosed as in the case of steel sheet pile, the size of the steel sheet is smaller than that of the steel sheet pile, it is easy to carry, and the amount of steel material used is small, so that it is inexpensive.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view of a temporary closing structure showing an embodiment of the present invention.

FIG. 2 is a schematic plan view showing a positional relationship between a box piece and a columnar body.

FIG. 3 is a schematic perspective view of a pair of box pieces.

FIG. 4 is a detailed perspective view of one box piece.

FIG. 5 is a view taken in the direction of arrow A in FIG. 3;

FIG. 6 is a view on arrow B of FIG. 3 when assembling the box piece.

FIG. 7 is a perspective view showing an example of a sealing material.

8 is a view as viewed in the direction of arrow A in FIG. 3 using the sealing material shown in FIG. 7;

9 is a view taken in the direction of arrow B in FIG. 3 when assembling a box piece using the sealing material shown in FIG. 7;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Box piece 2 Side plate 3 Bottom plate 4 Rib 5a Rib 5b Rib 6a Rib 6b Rib 7 Bolt insertion hole 8 Seal material 8a Natural sponge rubber 8b Water expansion sponge rubber 9 Bolt 10 Temporary closing member P Columnar body PF Basic concrete

Claims (1)

[Claims] 1. A box-shaped box formed by dividing a box-shaped body comprising a side plate surrounding a columnar body and keeping a space between the columnar body and a bottom plate joined to a peripheral wall surface of the columnar body into plural pieces. A plurality of temporary closing members, each having a folded rib formed at the joint portion of the columnar body and the joint portion with the columnar body, and provided with a sealing material on the joint surface of the rib to make the joint portion watertight, are provided on the peripheral wall surface of the columnar body with a bottom plate. And a box-shaped body by joining and tightening the side plate and the side plate, and the bottom plate and the bottom plate through the respective ribs, and surrounding the columnar body. Temporary deadline structure.