JP3043915U - Saddle for anchoring bridge girder reinforcement cable - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To provide a fixing saddle for a bridge girder reinforced cable, which realizes weight reduction while maintaining strength and rigidity, and is capable of imparting smooth and reliable tensile force. SOLUTION: A reinforcing bridge 11 is provided in a metal box 8 having a semicircular guide groove 9 for holding an out cable by a stopper 10 on the bottom surface, and a horizontal bridge girder intersecting the main bridge girder in the metal box 8. Mounting plate 12 for fixing to
The metal box 8 was filled with mortar. Also,
The guide groove 9 was subjected to bottom resin processing such as fluororesin, and the out cable was held in the guide groove 9 via a friction-reducing resistance material made of a resin tube such as fluororesin.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to an anchoring saddle for an elevated bridge girder reinforced cable.

[0002]

[Prior art]

 As shown in Fig. 6, concrete viaducts such as highways generally have a road surface 4 (paving board) on a main bridge girder 2 of concrete or steel supported between bridge piers 1 and a horizontal bridge girder 3 intersecting with the main bridge girder 2. ) Has been formed.

When the main bridge girder 2 is made of steel, it retains its strength by its own rigidity, but in the case of concrete, a piano wire is embedded in concrete and pulled to this piano wire (inner cable). Prestressed concrete (PC concrete), which is strengthened by applying a force and applying a precompressive stress, is used.

Although the required strength is maintained in both the steel or PC concrete main bridge girders 2, the design load of the slab was changed from TL-20 to TL-25 in 1994, and the safety with time was changed. In order to secure the above, as shown in Fig. 6, an out cable 5 is stretched on the side of the main bridge girder 2 along the longitudinal direction of the main bridge girder 2, one end is anchored to the block 7 and the other end is deflected to the block 7. A reinforcement method is used in which a device (tension device) is provided and the out cable 5 is tensioned to give precompressive stress to the main bridge girder 2 of steel or PC concrete by tensile force.

When the out cable 5 is stretched, a saddle 6 that guides and holds the out cable 5 is fixed to the horizontal bridge girder 3 so that the out cable 5 is pulled up between the piers 1.

[0006]

[Problems to be solved by the device]

 By the way, the conventional saddle is a casting or an iron ingot, and the guide groove for holding the out cable 5 is molded or machined in the casting or the iron ingot. Therefore, the conventional saddle has a weight of 40 to 50 kg, and there is a problem in that the work of fixing the saddle to a horizontal bridge girder at a high place is a heavy labor and accompanied by danger.

An object of the present invention is to provide a saddle for anchoring a bridge girder reinforced cable that realizes weight reduction while maintaining strength and rigidity, and that can provide smooth and reliable tensile force.

[0008]

[Means for Solving the Problems]

 To achieve the above object, the structure of the present invention is a saddle for anchoring a bridge girder reinforced cable in which a concrete or steel main bridge girder supported between bridge piers is tensioned and reinforced with a tensioned out cable. A semicircular guide groove is formed on the bottom of the metal box to hold the out cable with a fastener, and a reinforcing bar is provided in the metal box, and it is fixed to a horizontal bridge girder that intersects with the main bridge girder. A mounting plate is provided, and mortar is filled in the metal box.

Another structure of the present invention is an anchoring saddle for a bridge girder reinforced cable, in which a main bridge girder of concrete or steel supported between bridge piers is reinforced by applying tension with an out cable that is tensioned. In order to reduce the frictional resistance when the out cable is strained, the bottom cable of the fluorocarbon resin is used to hold the out cable on the bottom of the metal box with a stopper through a friction-reducing resistance material made of a fluorocarbon resin resin tube. A semicircular guide groove is formed, and reinforcing bars are provided in the metal box, and a mounting plate for fixing to the horizontal bridge girder intersecting with the main bridge girder is provided, and the mortar is provided in the metal box. It is characterized by being filled with.

[0010]

[Embodiment of the invention]

 An embodiment of the present invention will be described with reference to the drawings. 1 to 4, 6 is a saddle according to the present invention. The saddle 6 is a metal box 8 whose upper side is open, and the out cable 5 is guided to the bottom surface of the saddle 6 and an internal concave groove 9 to be held by a stopper 10 is formed.

Reinforcing bars 11 (reinforcing bars) are provided in the metal box 8, and a mounting plate 12 for fixing to the horizontal bridge girder 3 is provided.

The mounting plate 12 faces each other at an interval corresponding to the width of the horizontal bridge girder 3, and a main bolt hole 13 and a sub bolt hole 13 a are formed at a portion separated from the main bolt hole 13. . The main bolt hole 13 and the sub bolt hole 13a prevent the saddle 6 from rotating around the lateral bridge girder 3 and are firmly fixed.

Further, a non-shrinkable mortar is filled in the metal box 8 in which the reinforcing bars 11 are provided to complete the product.

The saddle 6 shown in FIGS. 1 to 4 has a structure for guiding and holding the horizontal portion of the out cable 5. That is, the internal concave groove 9 of the out cable 5 formed on the bottom surface of the metal box 8 is formed by a horizontal straight line. The extension of the out cable 5 is not necessarily horizontal, and there are curved portions depending on the extension. In order to deal with such a portion, as shown in FIG. 5, the basic configuration is the same as that of FIGS. 1 to 4, but a curved portion is provided on the bottom surface of the metal box 8, and the curved portion is provided. The inner concave groove 9a of the out cable 5 having a curved line following the above is formed.

In order to reduce the frictional resistance when the out cable 5 is strained, as shown in FIG. 3, the guide recessed grooves 9 and 9a are subjected to a bottom resin processing 14b such as a fluororesin, and a resin such as a fluororesin is used. The tube 14a is held around the outer circumference of the out cable 5, and is held in the guide groove 9, 9a by the stopper 10. This resin tube 14a (anti-friction resistance material) whose circumference is divided into two is easy to handle when it is held on the outer circumference of the out cable 5. The resin processing 14b at the bottom of the guide grooves 9 and 9a and the resin tube 14a may be a resin having good sliding property other than fluororesin.

Since the present invention has the structure as described above, the saddle 6 is composed of the metal box 8, but the reinforcing bar 11 (rebar) is provided inside the saddle 6 and is filled with mortar. In addition to ensuring strength and rigidity, it is lighter than conventional castings or ingots.

Incidentally, the saddle 6 according to the present invention has a light weight of 20 kg and a weight reduction of 20 to 30 kg as compared with a conventional saddle made of a casting or an iron ingot having a weight of 40 to 50 kg. The cost can be reduced and the product can be provided at low cost.

By reducing the weight of the saddle 6, the work of fixing the saddle 6 to the horizontal bridge girder at a high place becomes easy and the safety is secured.

Further, the bottom resin processing 14b of the guide groove 9, 9a made of fluororesin or the like and the resin tube 14a of fluororesin or the like held on the outer circumference of the out cable 5 allow the saddle 5 to be tightened when the outer cable 5 is tensioned. The out cable 5 held in the guide grooves 9 and 9a of No. 6 has a reduced frictional resistance and good sliding, and the pulling force can be surely applied to the out cable 5.

It should be added that the saddle according to the present invention can be applied not only to concrete viaducts for highways but also to concrete viaducts for railways and other general concrete bridges.

[0021]

[Effect of the invention]

 As described above, according to the anchorage saddle for a bridge girder reinforced cable of the present invention, the structure of claim 1 ensures strength and rigidity while reducing the weight, and facilitates the work of fixing the saddle to a horizontal bridge girder at a high place. However, there is an advantage that it can be provided at low cost while ensuring safety.

According to the structure of claim 2, in addition to the above advantages, the friction resistance of the out-cable held in the guide groove of the saddle is reduced when the out-cable is tensioned, and the sliding is improved. There is an advantage that the pulling force can be surely applied to the out cable.

[Brief description of the drawings]

FIG. 1 is a side view of the present invention.

FIG. 2 is a plan view of the present invention.

FIG. 3 is a front view of the present invention.

FIG. 4 is a bottom view of the present invention.

FIG. 5 is a side view showing a modified example of the present invention.

FIG. 6 is a side view showing an implementation state of a fixing saddle for a bridge girder reinforced cable.

[Explanation of symbols]

 1 Bridge pier 2 Main bridge girder 3 Horizontal bridge girder 4 Road surface (paving board) 5 Out cable 6 Saddle 7 Block 8 Metal box 9 Guide groove (horizontal) 9a Guide groove (curved) 10 Fastener 11 Reinforcing bar (rebar) 12 Mounting plate 13 Main bolt hole 13a Sub bolt hole 14a Resin tube 14b Bottom resin processing

Claims (2)

[Utility model registration claims] 1. A fixing girder for a bridge girder reinforcing cable for reinforcing a main bridge girder of concrete or steel supported between bridge piers with a tensioned out cable, wherein the out cable is fixed to the bottom of a metal box. Forming a semicircular guide groove to be held by metal fittings, providing reinforcing bars in the metal box, and providing a mounting plate for fixing to a horizontal bridge girder intersecting with the main bridge girder, and mortar in the metal box. Saddle for anchoring bridge girder reinforced cable characterized by being filled with. 2. An anchoring saddle for a bridge girder reinforcing cable for reinforcing a main bridge girder of concrete or steel supported between bridge piers by applying tension with an out cable that is tensioned, wherein the out cable is made of fluorine on the bottom surface of a metal box. Form a semi-circular guide groove grooved with a bottom resin processing such as fluororesin, which is held by a stopper through a friction-reducing resistance material made of resin tube such as resin, and provide reinforcement bars in the metal box. A saddle for anchoring a bridge girder reinforcing cable, characterized in that a mounting plate for fixing to a lateral bridge girder intersecting with the main bridge girder is provided, and mortar is filled in the metal box.