JPH083929A - Sealing material for floor slab and bridge girder in bridge - Google Patents

Abstract

PURPOSE:To make it possible to install a sealing material in a clearance formed between a floor slab and a bridge girder which constitute a bridge and enhance construction accuracy and reduce construction cost as well. CONSTITUTION:Mortar 12, which serves as a filler material is sealed into a tube 11 made of an expandable elastic rubber or the like, thereby constituting a sealing material 10. Even in case when a spacing between a floor slab 3 and a bridge girder 2 is not definite due to an inclination, such as a curve or a slope, it will be possible to function as a proper-sized sealing material, if the outside diameter of the tube 11 is adjusted by controlling the filling content of the mortar 12.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sealing material for floor slabs and bridge girders in bridges such as road bridges.

[0002]

2. Description of the Related Art In a bridge, a plurality of bridge girders arranged in the width direction and extending in the bridge axis direction are bridged between a plurality of vertically installed bridge piers, and a roadbed is formed on these bridge girders. The structure is common. Roadbeds of road bridges in recent years are generally constructed by arranging a large number of precast concrete slabs called floor slabs on which pavement materials such as asphalt are laid. The deck is installed on the bridge girder and connected to the bridge girder.
For connection, a large number of dowels such as stud bolts are planted on the bridge girder, and the dowels are passed through the holes made in the floor slab or the gaps between the floor slabs and concrete is placed in the holes or gaps. In order to obtain the required cohesive strength, it is necessary that a certain distance be secured between the bridge girder and the deck, and that a suitable amount of concrete be placed there. Therefore, between the bridge girder and the floor slab, a pair of seal members that are separated from each other and extend in the length direction of the bridge girder are sandwiched, and these seal members prevent the concrete from flowing out. A band-shaped steel plate, a rubber sheet or the like is mainly used as the sealing material.

By the way, the space between the floor slab and the bridge girder is not always constant, for example, because the floor slab is inclined inward at the curved portion, so that the space widens outward. Therefore, in order to follow such a change in the interval, the thickness of the sealing material is changed, or a plurality of sealing materials are piled up.

[0004]

As described above, in order to change the thickness of the sealing material, it is necessary to prepare a plurality of sealing materials having different thicknesses, which is troublesome and costly, and a plurality of sealing materials are stacked. The work is also complicated. Further, in any case, it was difficult to sandwich the seal material so as to fit the space between the floor slab and the bridge girder accurately, resulting in a decrease in construction accuracy.

The present invention has been made in view of the above circumstances. In a bridge in which a sealing material can be easily and accurately arranged between a floor slab and a bridge girder, and construction accuracy and cost can be reduced. The purpose is to provide sealing materials for floor slabs and bridge girders.

[0006]

SUMMARY OF THE INVENTION The present invention is to achieve the above object, and in claim 1, a floor slab is provided on a bridge girder and extends in the length direction of the girder and is spaced from each other. When grouting materials such as concrete are filled in the space formed between these sealing materials, bridge girders and floor slabs to form a roadbed for bridges, the sealing materials are expanded to have an elastic diameter. It is characterized in that a filling material is enclosed inside a possible tube.

Further, as the filling material, a self-hardening material such as mortar or resin or a fluid such as air or water is used.

[0008]

According to the sealing material of the present invention, the sealing material fills the space between the floor slab and the bridge girder by filling the inside of the tube with the filler to the extent that the upper end surface of the tube is pressed against the lower surface of the floor slab. Will be distributed. Even if the space between the deck and bridge girder changes due to the inclination of the curve or slope, etc., if the outer diameter of the tube is adjusted by appropriately adjusting the filling amount of the filling material, It functions as a sealing material with an appropriate size according to the interval.

If a fluid such as air or water is used as the filling material in the tube constituting the sealing material, the sealing material is not needed after the grout material is hardened, so air or water is removed from the tube and the tube is reused. it can.

[0010]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a partial front sectional view of the bridge 1 as seen from the bridge axis direction. This bridge 1 is a road bridge, and a plurality of bridge girders 2 which are arranged at intervals in the width direction and extend in the bridge axis direction are bridged between a plurality of bridge piers (not shown), and a deck slab 3 is provided between these bridge girders 2.
And the pavement material 4 such as asphalt is laid on the floor slab 3 to form a roadbed 5. The bridge girder 2 is an I-shaped steel frame material, and the joint gaps 6 of the left and right floor slabs 3 are arranged on the upper horizontal face plate 2a, and these floor slabs 3 are joined to the face plate 2a and The three are connected.

The floor slab 3 is constructed by placing concrete 3b on a rectangular steel plate skin plate 3a on the bottom surface and reinforced reinforcing bars (not shown) embedded inside the concrete 3b. It is a so-called precast concrete slab manufactured in.

As shown in FIG. 2, on the face plate 2a of the bridge girder, a large number of dowels 7 made of stud bolts are erected along the length direction of the bridge girder 2 (only one is visible in FIG. 2). The floor slabs 3 are arranged so as to sandwich these dowels 7 from the left and right. That is, the dowel 7 is passed through the joint gap 6 between the floor slabs 3. The floor slab 3 is placed on the face plate 2a of the bridge girder 2, but a predetermined space L is formed between the floor slab 3 and the face plate 2a.
The sealing material 10 that fills the space L is arranged on the left and right.

The pair of sealing materials 10 are constructed by enclosing a filler material 12 inside a tube 11 having elasticity and having a circular cross-section which is made of rubber or the like and whose diameter can be expanded. In this case, the filler 12 is mortar, which is a self-hardening material. Then, concrete 13 is poured as a grout material in a space formed by each floor slab 3, the bridge girder 2, and the sealing material 11. As a result, each floor slab 3
Are connected to the bridge girder 2 and also to each other.

Next, a construction procedure for obtaining the above structure will be described. First, on the face plate 2a of the bridge girder 2,
A pair of tubes 11 forming the sealing material 10 are arranged.
The tubes 11 are placed on both ends of the bridge girder 2 in the width direction along the length direction of the bridge girder 2, and the portions contacting the face plate 2a are bonded as necessary. Next, the floor slab 3 is supported by a temporary receiving girder (not shown), and a predetermined space L is provided between the floor slab 3 and the face plate 2a. Next, the inside of the tube 11 is filled with the filling material 12, and the filling material 12 is sealed so as not to leak when the filling amount reaches such a degree that the upper peripheral surface of the tube 11 comes into pressure contact with the lower surface of the floor slab 3. In this way, to fill the filler 12,
One end of the tube 11 is closed, and after filling, the other end is sealed. After this, concrete 13 is poured into the space formed by the floor slab 3, the bridge girder 2, and the sealing material 10. After the concrete 13 is hardened, the floor slab 3 is placed on the concrete 13
It becomes a state of being installed on the bridge girder 2 by being supported by and then the temporary receiving girder is removed.

According to the above sealing material 10, the tube 11
Since the height of the sealing material 10 can be made variable by changing the outer diameter of the tube 11 depending on the filling amount of the filling material 12 into the inside, the floor slab 3 and the bridge girder 2 due to the inclination of a curve or a slope. Even if the interval is not constant and changes, it functions as the sealing material 10 having an appropriate size (height) according to the interval by appropriately adjusting the filling amount of the filler 12. Therefore, the construction accuracy can be improved.

FIG. 3 shows an example of such a case. In this case, the floor slab 3 is inclined toward the inside of the curve at the curve portion, and the floor slab 3 and the bridge girder 2 are shown.
Although the distance between the outer tube 11 and the outer tube 11 expands outward, the filling amount of the filling material 12 into the outer tube 11 is made larger than that of the inner side to form the sealing material 10. Further, the adjustment of the filling amount of the filling material 12 is not managed numerically, but it is sufficient to visually judge the extent to which the upper end peripheral surface of the tube 11 is pressed against the lower surface of the floor slab 3 as described above. , Very easy. Further, it is not necessary to prepare a plurality of sealing materials or sealing materials having different thicknesses, which leads to cost reduction.

The tube 1 constituting the sealing material 10
As the filler in 1, a self-curing material such as resin or a fluid such as air or water may be used in addition to the mortar of the embodiment. If air, water, etc. are used, concrete 13
After curing, the sealing material is not necessary, so that air or water can be removed from the tube 11 and the tube 11 can be reused. Therefore, not only as a filler but also as an added value that can be reused, it is possible to significantly reduce the cost.

[0018]

As described above, according to the seal material for the floor slab and bridge girder of the bridge of the present invention, the filler is enclosed in the expandable tube having elasticity. The feature is that even if the space between the deck and the bridge girder is not constant and changes due to the inclination of the curve or slope, it can be used as a seal material between the deck and the bridge girder easily and accurately. It can be arranged, and there is an effect that the construction accuracy can be improved and the cost can be reduced.

[Brief description of drawings]

FIG. 1 is a partial front sectional view of a bridge to which an embodiment of the present invention is applied.

FIG. 2 is an enlarged view of a II portion in FIG.

FIG. 3 is a front sectional view showing a modified example of the embodiment.

[Explanation of symbols]

 1 Bridge 2 Bridge girder 3 Floor slab 6 Joint gap 10 Sealing material 11 Tube 12 Filling material 13 Concrete (Grout material)

Claims (3)

[Claims] 1. A floor slab is arranged on a bridge girder with a sealing material extending in the lengthwise direction of the bridge girder and separated from each other, and a space formed between the sealing material, the bridge girder and the floor slab. In forming a roadbed of a bridge by filling the inside with a grout material such as concrete, the sealing material has a structure in which the filling material is enclosed inside an expandable tube having elasticity. Sealing material for floor slabs and bridge girders. 2. The floor slab / bridge girder sealing material according to claim 1, wherein the filler is a self-curing material such as mortar or resin. 3. A sealant for a deck and a bridge of a bridge according to claim 1, wherein the filler is a fluid such as air or water.