JP2001193016A - Launching machine for erecting bridge - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a launching machine, the deflection of which is prevented and in which unsafe works on a pier foundation are removed by horizontally maintaining the launching machine and the front section of the launching machine can be stretched efficiently on a roller, in the launching machine used for a bridge launching erection method. SOLUTION: A jack is installed on the connection frame side to a bridge of the launching machine, a distance is formed between a cable, the root of which is attached to the jack, and the launching machine and the front end side is bound tightly onto the top face of the front section of the launching machine in the cable, the cable is tensed by the jack, upward warping force is imparted to the launching machine, the deflection of the launching machine is prevented, and the launching machine can be maintained horizontally.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hand-rolling machine used for erection of a bridge between piers.

[0002]

2. Description of the Related Art As a bridge erection construction method, a construction method is employed in which a bridge is sent out from a land side to a pier by a feed-out device. Since a bridge is a long and heavy object, if it is sent out as it is in a cantilever state, it will bend and a bending moment will be generated. In particular, just before the tip reaches the pier, the bending moment is maximized, and a large bending stress is applied to the original support portion of the bridge on the delivery device side, and the bridge is deformed or broken.

[0003] For this reason, a lightweight hand-rolling machine is mounted on the tip of the bridge so that the bridge is not as cantilevered as possible, first sent out from the hand-rolling machine, the hand-rolling machine is passed over the pier, and the bridge is bridged. Means of sending out in a double-supported state are taken. However, even if it is a hand-rolling machine, since it has a length substantially between the spans of the piers, it is naturally bent when it is sent out,
The tip may interfere with equipment on the abutment or pier foundation,
It was almost impossible to pass over the pier just by sending it out.

Conventionally, as means for responding to the bending of the hand-rolling machine, a jack is installed on the pier foundation, and when the hand-rolling machine is sent out and reaches the pier, the tip of the hand-rolling machine is jacked up. Then, the roller is mounted at a predetermined height on the pier foundation, and the tip of the hand-rolling machine is jacked down and delivered to the roller.

However, in this method, a jack or its cradle is carried on a narrow pier foundation by a crane or the like,
It must be assembled and installed, and after use, the jack and cradle must be disassembled and transported again with a crane or the like. In addition, when jacking up the hand-rolling machine during this time, in order to prevent the tip of the hand-rolling machine from coming into contact with the rollers, once remove the rollers, lift the tip of the hand-rolling machine to a high position, and then attach the rollers. It also took me.

As described above, the assembling, disassembling and jacking of the jack and cradle on the narrow pier foundation, and the work of removing and attaching the rollers have to be performed manually, resulting in inefficient and unsafe work. Met. It is also known to attach a hand-rolling machine to a bridge by inclining the hand-rolling machine upward using a connecting structure having an angle in consideration of the amount of bending in advance.

However, in this method, it is necessary to prepare a connecting structure having a different angle for each operation. In such a construction method, when sending out the hand-rolling machine, the indication condition (the amount of bending) at each fulcrum is always required. ),
When the tip of the hand roll reaches the pier, it is difficult to manage it on site so that it just touches the upper surface of the roller.

[0008]

SUMMARY OF THE INVENTION According to the present invention, when the hand-rolling machine is fed out, the hand-rolling machine is prevented from bending and the hand-rolling machine is kept horizontal, so that the unsafety on the pier foundation can be improved. It is an object of the present invention to obtain a hand-rolling machine which eliminates work and can efficiently transfer the front end of the hand-rolling machine to rollers.

[0009]

Means for Solving the Problems A jack is provided on the connecting structure side of the hand-rolling machine, and a cable attached to the jack is provided with a distance between the cable and the hand-rolling machine. The cable was tied to the upper surface, and the cable was tensioned by a jack to apply a warping force to the hand-rolling machine, thereby eliminating the bending of the hand-rolling machine and maintaining the horizontal state.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a view showing the concept of a method for sending out and erection of a bridge using a hand rolling machine. FIG. 2 is a view schematically showing a hand-rolling machine according to the present invention. FIG. 3 is a schematic view showing another example of the hand-rolling machine according to the present invention. In the figure, 1 indicates a bridge and 2 indicates a pier. Reference numeral 3 denotes a hand-rolling machine, which is connected to the bridge 1 via a connecting structure 4. There is also a case where the connection is directly performed without using the connection structure 4.

The hand roll 3 has a length substantially between the spans of the pier 2, but has a girder structure which is extremely lighter than the bridge 1. Reference numeral 5 denotes a jack provided at the base of the hand-rolling machine 3 on the connecting structure 4 side. A cable 6 is attached to the jack 5 and provided with a distance between the cable 5 and the hand-rolling machine 3.

In the example shown in FIG. 2, an intermediate support 7 is provided on the hand-rolling machine 3, and a wheel 8 mounted on the intermediate support 7 has
The distance is provided by extending the cable 6, and when the cable 6 is tensioned, an upward warping force is applied to the hand-rolling machine 3. This intermediate support member 7 may be provided on the base side of the hand-rolling machine 3 more than the illustrated position. In this case, since the cable 6 between the jack 5 and the wheel 8 has an angle close to vertical, the jack 5 is also installed at an angle close to vertical accordingly.

In the example shown in FIG. 3, the jack 5 is installed on a jack mounting base 12 provided on the hand-rolling machine 3 and is provided at a position higher than the hand-rolling machine 3. In the case of this example, the distance is given by the jack attachment base 12, and similarly to the example of FIG. 2, when the cable 6 is tensioned, the hand-rolling machine 3 is given an upward warping force.

Reference numeral 9 in the figure denotes a guide formed at the tip of the hand-rolling machine 3 and having a forward upward inclination. Reference numeral 10 denotes a wide roller installed at a predetermined height on the foundation of the bridge pier 2, on which the hand-rolling machine 3 is mounted, supported and sent out, and finally the bridge 1 is supported. You.

Numeral 11 denotes a feeding device, which is a mechanism for intermittently feeding by jacks sliding up and down by a jack sliding at a predetermined interval,
A mechanism is used in which a bridge is mounted on a bogie that runs on rails provided at the site, and the bogie is self-propelled and continuously fed.

The configuration of the present invention is as described above. Next, the state of use and operation will be described. First, when the cable 6 is tensioned by the jack 5, the cable 6 is given a distance between the cable 6 and the hand-rolling machine 3, so that the hand-rolling machine 3 is subjected to an upward warping force. With this, the hand-rolling machine 3 is released from the originally generated bending,
It can be kept straight and horizontal.

Therefore, even if the hand-rolling machine 3 is mounted on the bridge 1 and sent out toward the pier 2 by the sending-out device 11,
Since the hand roll 3 does not bend and is maintained in a horizontal state, it can be passed over the rollers 10 of the pier 2 by being fed out as it is. Of course, if the hand roll machine 3 is supported on the rollers 10, the bridge 1 will be in a double-supported state. Therefore, by continuously sending out the bridge 1, the bridge 1 is erected on the pier 2. .

[0018]

According to the present invention, a jack is provided at the base of the connecting structure of the hand-rolling machine, and the cable attached to the jack is provided with a distance between the hand-rolling machine and the front end of the hand-rolling machine. Since the cable is tied to the upper surface of the tip, the cable is tensioned by the jack, so that the bending of the hand-rolling machine can be eliminated, and the hand-rolling machine can be maintained in a horizontal state.

For this reason, in the method of erection and erection of a bridge using a hand-rolling machine, jacking up and down work on a pier is not required, and unsafe work is eliminated.
Rapid erection has become possible.

[Brief description of the drawings]

FIG. 1 is a view showing the concept of a method of sending out and erection of a bridge using a hand rolling machine.

FIG. 2 is a view schematically showing a hand-rolling machine of the present invention.

FIG. 3 is a schematic view showing another example of the hand-rolling machine of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Bridge 2 Bridge pier 3 Hand roll machine 4 Connection structure 5 Jack 6 Cable 7 Intermediate support member 8 Wheel 9 Guide 10 Roller 11 Sending-out device 12 Jack mounting stand

Claims (3)

[Claims] A jack is provided on the connecting structure side of the hand-rolling machine, and a cable attached to the jack is provided with a distance between the jack and the hand-rolling machine. Tied up,
A hand-rolling machine for bridge erection, characterized in that the cable is tensioned by a jack, thereby giving the hand-rolling machine an upward warping force to eliminate bending and keep the hand-rolling machine horizontal. 2. The hand-rolling machine according to claim 1, wherein the hand-rolling machine is provided with an intermediate supporting member, and a cable is laid over a wheel mounted on the intermediate supporting member to provide a distance. Machine. 3. The hand-rolling machine according to claim 1, wherein a jack-mounting base is provided on the hand-rolling machine, and a jack is mounted on the jack-mounting base to provide a distance.