JPH082164Y2 - Bridge slab repair structure - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slab repair structure used for an existing bridge slab, and more particularly to a bridge slab repair structure using a concrete slab.

[0002]

In recent years, in the repair of slabs, such as bridges that require construction in the short traffic regulation period, by using a precast concrete slab shortening that is possible construction period, at night less traffic performs repair work to implement a full way and stopper or side road closures, road and entirely released, how to prevent hexa the passage on the trouble has been generalized to daytime heavily traveled. In this method, the existing concrete floor slab to be repaired is first demolished and removed from the main girder, etc., and then the newly installed concrete floor slab is placed on the main girder at this removed part through the bolts for height adjustment. Place and temporarily release road traffic. Next, after the road surface of the repair section was closed again, temporary tension was applied to the new concrete floor slab, and at the joints between the concrete floor slabs, a curable filling member such as non-shrink mortar was struck. After the non-shrink mortar is hardened, the main tension is applied to reopen the road surface.

In the above prior art, when the temporary traffic regulation is released, the new concrete floor slab is placed as it is without being fixed, and the road surface on the new concrete floor slab becomes unstable. There was a problem that the passage was extremely dangerous.

Therefore, in Japanese Patent Laid-Open No. 3-103510,
Is a comb-shaped axial force transmitting device between the new floor slab and the old floor slab.
Insert and place the ultra-fast hard concrete between the transmission tool and the old floor slab.
It is a replacement construction method for synthetic girder floor slabs filled with REIT.
The transmission tool is projected from the side of the new floor slab at regular intervals.
Recesses are formed in intervals to avoid force distribution muscles.
Have been proposed.

[0005]

[Problems to be solved by the invention] Replacement of the above synthetic girder slab
In the construction method, the old floor slab and the comb-shaped transmitter are ultra-fast
Although connected by concrete, the side of the new slab
Since the end face of the transmission tool is only abutted against the surface,
The new floor slab is not connected to the floor slab, and
Since the recess is formed in the transmitter according to the distribution muscle,
Manufacturing becomes complicated, and the transmission tool is
Expected to cost a lot of money
After placing it between the floor slabs, the gap between the old floor slab and the transmission tool
The concrete is filled with ultra-quick concrete.
It takes time to harden and the workability at the site is inferior.
I have a problem.

[0006] Accordingly, the present invention is to solve the above problems, already
New precast concrete to concrete floor slab
The connection work of the floor slab can be done easily in a short time,
It is an object of the present invention to provide a bridge slab repair structure that can ensure the safety of traffic on a new concrete slab when temporary traffic restrictions are lifted.

[0007]

[Means for Solving the Problems] The present invention is a bridge slab repair structure in which a part of an existing concrete floor slab forming a road surface is removed, and a new precast concrete slab is placed on the removed portion. Place one side of the angle on each of the existing concrete slab and the new concrete slab.
It is projected to one side and one side of these angles is at both ends.
The nuts are connected with each other by threaded round steel .

[0008]

[Operation] With the above structure, the existing concrete floor slab and the new precast concrete floor slab are inserted through the angle.
And both ends nuts are coupled to the thus integrally screwed round steel and thereby the temporary fixing of a new concrete slab can be achieved. Also, one side of the angle protruding above the floor slab
Are connected by round steel with nuts screwed on both ends,
The connecting work can be performed easily in a short time.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings. In FIGS. 1 and 2, reference numeral 1 denotes an H-shaped main girder installed in parallel on a bridge or the like, and an existing concrete floor slab 3 is installed on the upper surface of a flange portion 2 formed in the vertical direction of the main girder 1. Thus, a flat road surface 4 capable of passing on both sides is formed. Reference numeral 5 is a cut surface formed on one side of the road surface 4 to be repaired, and the cut surface 5 removes a part of the existing concrete floor slab 3. Then, a plurality of new precast concrete floor slabs 6 are placed at right angles to the road surface 4 in the removed portion. In the concrete floor slab 6, a through hole 7 parallel to the road surface 4 is previously drilled, and an angle 8 is fixed to the inner side surface. In addition, joints 9 formed between each concrete floor slab 6
A rubber packing 10, which is an elastic member, is interposed at a proper position. When the concrete floor slab 6 is placed,
The flange portion 2 of the main girder 1 located near the center of the road surface 4,
A height adjusting bolt 11 is screwed into the angle 8 and the level of each concrete floor slab 6 is sequentially adjusted through the height adjusting bolt 11. In addition, 12 is a rod-shaped rebar of different diameter embedded in the concrete floor slab 6.

Numeral 13 is a pair of temporary tensioning tools which are arranged on both outer and upper and lower sides of the new concrete floor slab 6 and on the inner side surfaces. The provisional tensioning tool 13 has a hole 14 formed substantially in the center thereof, and a steel threaded rod, a Gevin disturb 15, is inserted into the hole 14 in parallel with the road surface 4. 16 is a joint member connected between each existing concrete slab 3 and each new concrete slab 6, and the joint member 16 is
Insert 17 and bolt embedded in concrete floor slab 6
The angle 19 is fixed by 18 and the hole-in anchor 20 is driven into the edge of the concrete slab 3 to fix another angle 21, and the nut 22 fixes the round steel 23 between the angles 19 and 21. It is configured by

FIG. 4 shows a temporary tension state of the concrete floor slab 6 after placing the new concrete floor slab 6. The temporary tensioning tool 13 is fixed to the concrete floor slab 6 in advance by bolts 25, and one end of the Gebin Desturb 15 located at one side of the temporary tensioning tool 13 has a temporary tensioning tool.
A nut 27 that comes into contact with the standing surface 26 of 13 is screwed in, and an expandable and contractible jack 28 is laterally provided on the side surface of the new concrete floor slab 6, and the moving portion 29 of this jack 28 has the Gevin Desturb 15 The other end is fixed. And jack
By moving the moving part 29 of 28 to the outside, a tensile force is applied to each of the Gevin disturbs 15, so that the temporary tension of each concrete floor slab 6 with the rubber packing 10 interposed in the joint 9 is applied. Done.

After the temporary tension of the concrete floor slab 6, the traffic restrictions are temporarily released. That is, as shown in FIG. 5 , the H-shaped steel material 31 is arranged on the temporary tensioning tool 13 and the Kevin disturb 15 located outside the concrete floor slab 6 and covers the joint member 16. A single pipe barricade 32 is provided, and a lining plate is provided in a recessed portion on the road surface 4 as necessary, so that the road surface 4 can be passed.

Next, when the passage is restricted again, as shown in FIG. 6 , a non-shrink mortar 34, which is a filling member having a hardening property, is placed on the joint 9 in the temporary tension state. here,
The traffic restrictions are released again, and after the non-shrink mortar 34 is hardened, traffic restrictions are applied. Then, with the newly installed concrete slab 6 temporarily tensioned, a new concrete slab 6 is placed on the road surface 4 located on the opposite side of the concrete slab 6 in the same manner as above, and then the joint member 16 By fixing the concrete slabs 6 to each other, temporary tension is applied. In this way, after the non-shrink mortar 34 has hardened over the entire road surface 4, the steel material 31, the single pipe barricade 32 and the like are removed, and the temporary tension is released to the new concrete floor slab 6.

FIG. 3 shows the concrete floor slab 6 in the fully tensioned state. The through-hole 7 of the concrete slab 6 is inserted tendons 35 made of steel, by pulling <br/> tendons 35 by a fixing device 36, performs the tension of the concrete slab 6. The tension member 35 is wound by a sheath. Then, as shown in FIG. 7, the different-diameter rebars 12 are fixed by welding or the like, and the super quick-hardening concrete 37 is placed between the concrete floor slabs 6 and at the other recesses on the road surface 4. On the other hand, a new road surface 4 was created by placing super-hardened concrete 37 in the same way.
And a non-shrink mortar 30 between the upper surface of the flange portion 2 and the bottom surface of the angle 8 and the concrete floor slab 6.
To complete the repair.

As described above, in the above embodiment, the existing
On concrete floor slab 3 and new concrete floor slab 6
Put the nuts 22 and 22 on both sides of the angle 21 and 19
It is possible to connect the existing concrete floor slab 3 and the new concrete floor slab 6 by connecting with the round steel 23 that is screwed , and when the temporary traffic regulation of the road surface 4 is released, the existing concrete floor slab 3 It is possible to secure and integrate the new concrete floor slab 6 and the new concrete floor slab 6 to ensure the safety of traffic on the new concrete floor slab 6. Also,
Existing concrete slab 3 and new concrete slab 6
The connection with the
The nuts 22 and 22 are screwed to both ends of one side of the dongles 21 and 19
Since it is connected with round steel 23, the connection work can be simplified in a short time.
Can be done by stool.

Further, in this new the between the concrete slab 6 performs temporary tension while interposing a rubber packing 10, since they are fixed in a state of stable servants do concrete slab 6 of new, existing by coupling member 16 Concrete floor slab 3
And the new concrete floor slab 6 are more firmly and integrally fixed, and the safety thereof can be further improved.

The present invention is not limited to the above embodiment, and various modifications can be made within the scope of the present invention. For example, the size of the joint hand member, dimensions, etc., Ru suitably configurable der according to the concrete slab to be placed.

[0018]

[Effect of the Invention] The present invention removes a part of the existing concrete floor slab that forms the road surface, and a new precasing is installed in this removed part.
In the repair structure of the bridge slab on which the concrete slab is placed , it is common that one side of the angle is projected upward to the existing concrete slab and the new concrete slab.
Then, screw nuts on both ends between one side of these angles.
An existing concrete floor that is connected by round steel
Connecting the new precast concrete floor slab to the slab
Therefore, it is possible to provide a bridge slab repair structure capable of ensuring the safety of traffic on a road surface on a new concrete slab when the temporary traffic regulation is lifted.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention during temporary tension.

FIG. 2 is a front view of the main part of the concrete floor slab mounted on the same.

3 is a cross-sectional view after ibid present tense.

4 is a partially enlarged side view when ibid temporary tension.

FIG. 5 is a front view of the main part when the above temporary tension is applied.

FIG. 6 is an enlarged cross-sectional view of a main part when the non-shrink mortar is placed .

FIG. 7 is a front view of the main part of the same after the main tension.

[Explanation of symbols]

4 Road surface 3 Concrete slab 6 Precast concrete slab 16 Joint member 19, 21 Angle 22 Nut 23 Round steel

Claims (1)

[Scope of utility model registration request] [Claim 1] to remove a portion of the existing concrete slab forming the road surface, in the repair structure of a bridge deck mounting the precast Conc <br/> Ried slab of newly established this removal portion, said existing to the concrete floor slab of concrete slab with the newly established
Each one side of the angle is projected upward, and this
A repair structure for a bridge slab, characterized in that one side of the angle is connected by round steel with nuts screwed on both ends .