CN104195953B - Method and device for overall lateral removal of beam-type supports at the bottom plate of bridges - Google Patents

Abstract

A method and device for laterally moving out a whole beam-type support at the bottom plate of a bridge, which belongs to the technical field of bridge construction. It is composed of hoist, wire rope, guide pulley and electric hoist. c. On the center line of the beam body of the bridge, install reversible electric winches at the beam ends and mid-span positions on both sides, and fix them firmly with the beam surface and each other, and install them at the place where the wire rope contacts the beam body The guide pulley is fixedly connected to the electric hoist at an appropriate position on the steel wire rope at the bottom of the beam; d. Finally, the beam support moves left and right at the bottom of the bridge beam, so as to move the beam support out of the bottom of the beam and complete the horizontal movement of the beam support. The shifting work ensures the safety of the beam support disassembly. The beneficial effect is: not only can greatly save the time for the beam support to move laterally out of the bottom of the beam body, but also reduce construction costs, and can greatly reduce safety risks.

Description

Method and device for overall lateral removal of beam-type supports at the bottom plate of bridges

technical field

The invention belongs to the technical field of bridge construction.

Background technique

As a commonly used form of support for cast-in-place bridge construction, beam support has always been favored by engineers and technicians because of its less interference to road traffic, good integrity, and high rigidity. At present, as far as the dismantling method and equipment of the beam bracket are concerned, only a tire crane and simple auxiliary tools are used for disassembly. Such high-altitude operations are extremely dangerous. This poses a great threat to ground personnel and equipment, and this threat does not come from the lifting process of the beam support, but from the lateral movement of the beam support from the bottom of the beam body to the area where it can be lifted by a crane (Below the flange plate of the bridge) This process has also been proved by practice. The process of moving the beam support from the bottom of the beam body laterally is the most critical and dangerous moment for the removal of the entire bridge support, which directly affects the entire bridge construction. progress.

Contents of the invention

The purpose of the present invention is to provide a method and device for horizontally moving out the entire beam-type support at the bottom of the bridge, which can not only save the time for the beam-type support to move out of the bottom of the beam body laterally, reduce construction costs, but also greatly reduce safety risks.

The method of the present invention is:

a. After the sand bucket is unloaded, the beam support under the bridge flange plate is disassembled, and the hoisting combination equipment is hooped on the beam body through the girder ends on both sides of the longitudinal bridge direction and the drain hole in the mid-span, and three sets of the same The specific installation positions are respectively located at the beam ends and mid-span positions on both sides of the longitudinal bridge direction;

b. Each set of hoisting combination equipment is mainly composed of hoist, wire rope, guide pulley and electric hoist.

c. After the beam body is completed and qualified, use the beam body as the parent body of the hoisting combination equipment to install the hoisting combination equipment; first, on the center line of the beam body along the bridge, on both sides in the direction of the bridge Install reversible electric hoists at the beam end and mid-span, and connect them firmly to the beam surface. Secondly, install a suitable length of wire rope for each hoist, and install guide pulleys where the wire rope contacts the beam body. In order to prevent the wire rope from causing wear and damage to the beam body during the working process, finally, the electric hoist is fixedly connected to the wire rope at the bottom plate of the beam body at an appropriate position, so that the electric hoist can also move left and right when the hoist is reversing;

d. Through the above combined equipment, the beam support can finally move left and right at the bottom of the bridge beam, so as to move the beam support out of the bottom plate of the beam body, complete the horizontal movement of the beam support, and ensure the safety of the beam support disassembly;

e. After each group of beam supports is moved horizontally to the bottom of the bridge flange, it is hoisted to the ground by a tire crane.

The technical scheme of the device of the present invention is: the hoisting combined equipment is hooped on the beam body through the girder ends on both sides of the longitudinal bridge direction and the drain holes in the middle of the span, and three groups of the same hoisting combined equipment are installed, and the specific installation positions are respectively located in the direction of the longitudinal bridge. At the beam ends and mid-span positions on both sides; use the beam body as the parent body for the hoisting combined equipment installation to install the hoisting combined equipment; along the beam centerline of the bridge at the beam ends and mid-span positions on both sides along the bridge Install reversible electric winches, and connect them firmly to the beam surface, install wire ropes for each winch, and install guide pulleys where the wire ropes contact the beam body, and connect the electric hoist to the wire rope at the bottom plate of the beam body , so that the electric hoist also moves left and right when the hoist is reversing.

The beneficial effects of the present invention are: adopting the method and device for horizontally moving out the entire beam-type bracket at the bottom plate of the bridge can not only greatly save the time for the beam-type bracket to move out laterally from the bottom of the beam body, but also reduce construction costs and greatly reduce safety risks .

Description of drawings

Fig. 1 is the partial bridge structure front view of the present invention;

Fig. 2 is a structural diagram of the present invention in a transverse beam body;

Fig. 3 is a schematic diagram of the overall system of the present invention during construction.

detailed description

Example 1

The present invention will be further described below in conjunction with accompanying drawing:

As shown in the figure, 1 is the drain hole, 2 is the beam body, 3 is the pier body, 4 is the foundation, 5 is the winch, 6 is the anchor system, 7 is the guide pulley, 8 is the wire rope, 9 is the horizontal connection, 10 is a steel crossbeam, 11 is a Bailey piece, 12 is a steel buttress, 13 is a sand barrel, and 14 is an electric hoist.

Taking the Bailey beam as an object, the method and device for the overall horizontal removal of the beam support at the bottom of the bridge are introduced. The device makes full use of the beam itself to complete the task. Its main technical indicators are as follows:

1. After the sand bucket 12 is unloaded, the beam support under the bridge flange plate is disassembled, and the hoisting combination equipment is hooped on the beam body 2 through the girder ends on both sides and the drain hole 1 in the middle of the span. Generally, three sets are installed. The specific installation positions of the same hoisting combination equipment are respectively located at the beam end L/4 (L-beam length) on both sides and the mid-span position, as shown in Figure 1.

2. Each group of hoisting combined equipment is mainly composed of a reversible winch, multiple wire ropes, multiple guide pulleys, and six electric hoists (requires that all equipment, appliance models and power are completely consistent; three hoists can realize synchronous control ).

3. After the hole beam body 2 is completed and qualified, the beam body 2 is used as the parent body for the installation of the hoisting combined equipment to carry out the installation work of the hoisting combined equipment. First, on the center line of the beam body 2 of the bridge, the two sides of the beam end L/4 (L-the length of the beam body) and the mid-span positions respectively install electric hoists 5 that can be reversing forward and reverse, and fix them to the beam surface and to each other The connection is firm, as shown in Figure 2; secondly, install a steel wire rope 8 of appropriate length for each hoist, and install a guide pulley 7 at the place where the steel wire rope 8 contacts the beam body 2, so as to prevent the steel wire rope 8 from causing wear to the beam body 2 during the working process damage, as shown in Figure 2; finally, the electric hoist 14 is fixedly connected to the appropriate position on the steel wire rope 8 at the bottom plate of the beam body 2, so that the electric hoist 14 can also move left and right when the hoist 5 is reversing, and ensure that both The connection between them is firm, as shown in Figure 2.

4. Through the above combined equipment, the beam support can finally move left and right at the bottom of the bridge beam, so as to move the beam support out of the bottom plate of the beam body, complete the horizontal movement of the beam support, and ensure the safety of the beam support disassembly, as shown in the figure 3.

5. After each group of beam supports is moved horizontally to the bottom of the bridge flange, it is hoisted to the ground by a wheeled crane, as shown in Figure 3.

Claims (2)

1. A method for the overall horizontal removal of the beam support at the bottom plate of the bridge, the method is: a. After the sand bucket is unloaded, the beam support under the bridge flange plate is disassembled, and the hoisting combination equipment is hooped on the beam body through the two ends of the longitudinal beam and the drain hole in the mid-span, and three sets of the same The specific installation positions are respectively located at the beam ends and mid-span positions on both sides of the longitudinal bridge direction; b. Each group of hoisting combination equipment is mainly composed of hoist, wire rope, guide pulley and electric hoist; c. After the beam body is completed and qualified, use the beam body as the parent body of the hoisting combination equipment to install the hoisting combination equipment; first, on the center line of the beam body along the bridge, on both sides in the direction of the bridge Install reversible electric hoists at the beam end and mid-span, and connect them firmly to the beam surface. Secondly, install a suitable length of wire rope for each hoist, and install guide pulleys where the wire rope contacts the beam body. In order to prevent the wire rope from causing wear and damage to the beam body during the working process, finally, the electric hoist is fixedly connected to the wire rope at the bottom plate of the beam body at an appropriate position, so that the electric hoist can also move left and right when the hoist is reversing; d. Through the above combined equipment, the beam support can finally move left and right at the bottom of the bridge beam, so as to move the beam support out of the bottom plate of the beam body, complete the horizontal movement of the beam support, and ensure the safety of the beam support disassembly; e. After each group of beam supports is moved horizontally to the bottom of the bridge flange, it is hoisted to the ground by a tire crane. 2. The device used in the method for moving out the entire beam-type support of the bridge bottom plate part laterally as claimed in claim 1, characterized in that: the hoisting combination equipment is passed through the two ends of the longitudinal bridge direction beam and the water discharge hole in the span. hoop on the beam body, install three groups of the same hoisting combination equipment, the specific installation positions are respectively located at the beam end and mid-span position on both sides of the longitudinal bridge direction; use the beam body as the parent body of the hoisting combination equipment to install the hoisting combination equipment installation; along the centerline of the beam body of the bridge, install electric hoists at the beam ends and mid-span positions on both sides of the bridge, and connect them firmly to the beam surface, install steel wire ropes for each hoist, and connect the wire ropes with the beam body A guide pulley is installed at the contact place, and an electric hoist is fixedly connected to the steel wire rope at the bottom plate of the beam body, so that the electric hoist also moves left and right when the hoist is reversing.