JPH086289B2 - Temporary tensioning method for bridge slab repair work - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a temporary tension method for floor slabs in repair work for existing slabs, and particularly for floor work in bridge slab repair work using concrete slabs.
Regarding the temporary tension method of the plate .

[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 a new concrete floor slab is installed on the main girder at the removed part via bolts for height adjustment. Then, the road surface is temporarily released. Next, after the road surface of the repaired part is closed again, a curable filling member such as non-shrink mortar is placed in the joint between each concrete floor slab, and the main tension is performed after the non-shrink mortar hardens. By doing so, the traffic on the road surface is released again.

[0003]

In the above-mentioned prior art, since it takes time to cure the non-shrink mortar, a new concrete floor slab, a non-shrink mortar, and a temporary mortar are laid in a day's work. It is impossible to continue tension. For this reason, when the temporary traffic regulation is released, the new concrete slab is placed as it is without being fixed, and the road surface on this new concrete slab becomes unstable, which is extremely dangerous for traffic. There was a problem that it was accompanied.

Therefore, the present invention solves the above-mentioned problems, and when the temporary traffic regulation is released, the floor slab in the repair work of the bridge slab capable of ensuring the safety of the passage on the new concrete floor slab The purpose is to provide a temporary tension method.

[0005]

SUMMARY OF THE INVENTION The present invention is an auxiliary bridge deck slab.
A slab that temporarily tensions a concrete slab during repair work
In the temporary tensioning method, a tensioning force is applied to the concrete floor slab by interposing an elastic member in the joint between the plurality of precast concrete floor slabs forming the road surface, and then a curable filling member is placed in the joint. Floors for repairing bridge deck slabs
It is a method of temporary tension of the plate .

[0006]

With the above construction, when the concrete floor slab is installed, the elastic member is interposed between the joints between the concrete floor slabs, and in this state, each concrete floor slab can be temporarily tensioned immediately. Then, by driving the filling member into the joint, the main tension is performed after the filling member is cured.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings. In FIG. 1, 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 erected on the upper surface of a flange portion 2 formed in the vertical direction of the main girder 1. A passable flat road surface 4 is formed.

Next, a method for repairing the road surface 4 will be described. First, one side of the road surface 4 is cut from the cut surface 5, and the bottom surface of the main girder 1 is crushed to remove a part of the concrete floor slab 3 to be repaired. Then new precast concrete floor slab 6
Are installed in a direction perpendicular to the road surface 4. The concrete floor slab 6 is preliminarily provided with through holes 7 parallel to the road surface 4, and an angle 8 is fixed to the inner side surface of the concrete floor slab 6. A rubber packing 10, which is an elastic member, is interposed in this. When the concrete floor slab 6 is installed, as shown in FIG. 2, the height adjusting bolt 11 is provided between the flange portion 2 of the main girder 1 located near the center of the road surface 4 and the angle 8.
Is screwed in, 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.

Next, as shown in FIG. 3, a pair of temporary tensioning tools 13 are fixed by bolts 14 at the outer ends of the newly installed concrete floor slab 6 in the vertical direction. This temporary tension
13 is also arranged on the inner side surface of the concrete floor slab 6.
Further, a steel threaded rod, a Gevin disturb 16, is inserted through the hole 15 formed in the temporary tensioning tool 13 in parallel with the road surface 4. Then, the Gevin Desturb 16 located on one side of the temporary tensioning tool 13
A nut 18 that abuts the standing surface 17 of the provisional tensioning tool 13 is screwed in from one end of the, and an expandable and contractible jack 19 is installed horizontally on the side surface of the new concrete floor slab 6.
The other end of the Gevin disturb 16 is fixed to the moving part 20 of. In this way, by moving the moving portion 20 of the jack 19 to the outside, a tensile force is applied to each of the Gevin disturbs 16,
As a result, each concrete floor slab 6 is temporarily tensioned with the rubber packing 10 interposed in the joint 9.

After the temporary tension of the concrete floor slab 6, the traffic regulation is temporarily released. That is, as shown in FIG. 4, the H-shaped steel material 22 is arranged on the temporary tensioning tool 13 and the Kevin Destrobe 16 located outside the concrete floor slab 6, and the concrete located near the center of the road surface 4 is placed. A single pipe barricade 23 is provided between the floor slabs 3 and 6, and a lining plate is further provided in a recessed portion on the road surface 4 to enable passage on the road surface 4.

Next, when the passage is restricted again, as shown in FIG. 5, a non-shrinkable mortar 25, which is a filling member having a hardening property, is placed in the joint 9 in the temporary tension state. here,
To cancel the re-beauty transportation regulations, non-shrink mortar 25 performs a traffic regulation after hardening. And the new concrete floor slab 6
In the state where the concrete floor slab is temporarily tensioned, a new concrete floor slab 6 is erected on the road surface 4 located on the opposite side of the concrete floor slab 6 by the same method as described above, and the temporary tension is performed. In this way, the steel material 22 and the single pipe barricade 23 are removed and repair work is performed.
After releasing the temporary tension to the new concrete floor slab 6 which was temporarily performed inside, as shown in FIG. 6, the steel tension member 26 is inserted into the through hole 7 and the tension member 26 is fixed by the fixing tool 27. The main tension of the concrete floor slab 6 is performed by pulling.
The tension member 26 is wound by a sheath. Then, as shown in FIG. 7, the reinforcing bars 13 having different diameters are fixed by welding or the like, and the super rapid hardening concrete 28 is placed between the concrete slabs 6 and 6, and at the other recesses on the road surface 4. On the other hand, in the same way, a new road surface 4 was prepared by placing super-hardened concrete 28.
And the non-shrink mortar 21 between the upper surface of the flange portion 2 and the bottom surface of the angle 8 and the concrete floor slab 21.
To complete the repair.

Thus, in the above embodiment, the bridge
Temporarily tighten the concrete slab 6 during the slab repair work.
It is a temporary tension method of the floor slab to be stretched,
Elasticity at joint 9 between precast concrete floor slabs 6
Concrete floor slab with rubber packing 10 as a member
After applying tension to 6 and 6, a hardening filling member is applied to the joint 9.
Since the non-shrinkable mortar 25 is cast , the rubber packing 10 is preliminarily interposed in the joint 9 when the concrete floor slab 6 is erected.
It is possible to perform temporary tension to each concrete floor slab 6 following the erection of, and to fix and integrate the concrete floor slab 6 when the temporary traffic regulation of the road surface 4 is released, and It is possible to ensure the safety of traffic.

The present invention is not limited to the above embodiments, and various modifications can be made within the scope of the present invention. For example, the size, size, shape and thickness of concrete floor slabs and rubber packings. The size and the like can be appropriately selected. Further, the method of repairing the concrete floor slab can be applied not only to the bridge having the main girder but also to various constructions.

[0014]

[Effects of the Invention] The present invention is applied temporarily during repair work of bridge decks.
Temporarily tension concrete slab to
Then, after applying a tension force to the concrete floor slab by interposing an elastic member in the joint between the plurality of precast concrete floor slabs forming the road surface, a curable filling member is placed in the joint. , When the temporary traffic regulation is lifted, the floor slab is temporarily fixed in the repair work of the bridge slab, which can ensure the safety of traffic on the road surface on the new concrete slab.
Can provide a tension method.

[Brief description of drawings]

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

[Fig. 2] Fig. 2 is a front view of a main part when the concrete slab is installed.

FIG. 3 is a partially enlarged side view when the above-mentioned temporary tension is applied.

FIG. 4 is a front view of the main part when the above-mentioned temporary tension is applied.

FIG. 5 is an enlarged view of a main part when the non-shrink mortar is placed.

FIG. 6 is a cross-sectional view after the same tension tension.

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

[Explanation of symbols]

4 Road surface 6 Precast concrete floor slab 9 Joint 10 Rubber packing (elastic member) 25 Non-shrink mortar (filling member)

Claims (1)

[Claims] [Claim 1] Temporarily concealed during repair work of bridge deck
A method of temporarily tensioning a floor slab to temporarily tension the floor slab , wherein tension is applied to the concrete floor slab by interposing an elastic member between the joints of the precast concrete floor slabs forming the road surface, and then the joints. Temporary tightening of floor slab in repair work of bridge floor slab characterized by placing hardenable filling member
Zhang method.