Construction method of hoisting inspection vehicle at the bottom of bridge box beam

Abstract

A method for hoisting a bridge box girder bottom inspection vehicle does not require the use of a ship. It only requires a winch to be arranged on a bridge pedestal, a fixed hanging point to be arranged on the bottom of the bridge box girder, and a wire rope hand winch hoisting system to be arranged on the fixed hanging point, thereby completing the installation of the inspection vehicle beam bottom.

Description

Technical Field

[0001] The invention belongs to the field of building construction, and in particular relates to the maintenance of bridges. Background Art

[0002] Installation of bridge piers, winch lifting system, truck crane lowering the inspection vehicle on the bridge deck, installation of box beams, auxiliary hanging points, multi-point lifting technology. The traditional lifting method of the inspection vehicle on the water is to install two truck cranes on the bridge deck, and use the truck crane to load the inspection vehicle after it is assembled at the dock. The vehicle is then transported by ship to the lifting point at the bottom of the bridge beam for lifting. In actual construction operations, the ship cannot be moored at the bridge pier due to various reasons such as water flow, reefs, and pipe sinking piles, making it impossible to lift the inspection vehicle. Summary of the invention

[0003] The present invention aims to provide a method for hoisting a bridge box girder bottom inspection vehicle, so as to solve the technical problem that the bridge inspection vehicle cannot be hoisted on water.

[0004] In order to solve the above technical problems, the specific technical solutions of the present invention are as follows: A method for hoisting a bridge box girder bottom inspection vehicle, characterized in that it comprises the following steps: Step 1: Install the winch on the bridge cap, and lay and fix the guide pulley and track at the bottom of the bridge box girder; Step 2: Install the wire rope hand chain hoist on the outside and bottom of the bridge box girder to complete the layout of the wire rope hand chain hoist conversion lifting fixed points; Step 3: Use a truck crane to lift the inspection vehicle to the bridge pier on the box girder deck of the bridge. The construction personnel enter the inspection vehicle, use the cable wind rope to rotate the inspection vehicle 90 degrees, and connect the wire rope hand chain hoist to the gantry at both ends of the inspection vehicle; Step 4: The truck crane and two sets of wire rope hand hoist conversion systems work together to move the inspection vehicle to the middle of the bridge box girder; Step 5: Connect the two winch hooks to the gantries on both sides of the inspection vehicle respectively. The winch and the wire rope hand chain hoist work together to move the inspection vehicle further to the middle of the bridge box girder until the inspection vehicle moves to the bottom of the lifting point. The winch lifting system is fully stressed and the wire rope hand chain hoist is removed. Step 6: Use the winch hoisting system to lift the inspection vehicle until it is hoisted onto the track. After the inspection vehicle is connected to the track, the hoisting installation is completed.

[0005] Furthermore, a fixed hanging point is arranged at the bottom of the bridge box girder, a guide pulley is installed on the hanging point, and a winch is installed on the bridge pedestal using chemical anchor bolts.

[0006] Furthermore, the wire rope hand chain hoist has two fixed points for conversion and lifting, one point is arranged on the outside of the box beam, and the other point is arranged on the outer track.

[0007] Furthermore, in step 4, the inspection vehicle is moved to the outside of the box girder and the wire rope hand hoist on the outside track is stressed, and the truck crane is not stressed, and the hook of the truck crane is removed.

[0008] Furthermore, in step 4, during the movement, the truck crane is lowered and the wire rope hand winches at both ends of the truck are checked for synchronous contraction.

[0009] Furthermore, in step 4 and step 5, the inspection vehicle is kept level.

[0010] The technical solution of the present invention has the following advantages: 1. No need to use a ship, just lay out a winch on the bridge pedestal, lay out a fixed hanging point at the bottom of the bridge box girder, and lay out a wire rope hand winch lifting system on the fixed hanging point to complete the installation work of the bottom of the inspection beam.

[0011] 2. Realize hoisting on the upper part of the bridge, reduce the working area and ensure construction safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 This is a schematic diagram of the structure of step 3 of the present invention; Figure 3 This is a schematic diagram of the structure of the rotor in step 3 of the present invention; Figure 4 It is a structural schematic diagram of step 4 of the present invention; Figure 5 This is a schematic diagram of the structure after step 4 of the present invention is completed; Figure 6 This is a schematic diagram of the structure of step 5 of the present invention; Figure 7 This is a schematic diagram of the structure during the construction process of step 5 of the present invention; Figure 8 This is a schematic diagram of the structure after step 5 of the present invention is completed; Fig. 9 This is a schematic diagram of the structure during the construction process of step 6 of the present invention; Fig.10 This is a schematic diagram of the structure after step 10 of the present invention is completed. DETAILED DESCRIPTION

[0013] In order to better understand the purpose, structure and function of the present invention, the following is a further detailed description of the construction method for hoisting a bridge box girder bottom inspection vehicle of the present invention in conjunction with the accompanying drawings.

[0014] like Figure 1 to Figure 10 As shown, the bridge box girder bottom inspection vehicle hoisting construction method of the present invention comprises the following steps: Step 1: Install the winch 3 on the bridge cap, lay out the track 2 and the fixed hanging point at the bottom of the bridge box girder 1, and fix the guide pulley 5 on the fixed hanging point. The hook and wire rope of the winch 3 pass through the guide pulley 5.

[0015] Step 2: Install the wire rope hand chain hoist 4 on the outer side and bottom of the bridge box girder 1. The wire rope hand chain hoist 4 is laid out on the outer side of the box girder and on the track 2 closest to the outer side of the bridge box girder 1 to convert the lifting fixed point, and the wire rope hand chain hoist 4 is installed on the fixed point.

[0016] Step 3: Use a truck crane 6 to hoist the inspection vehicle 7 to the bridge cap on the bridge box girder 1. The construction personnel enter the inspection vehicle 7. After the inspection vehicle 7 is hoisted, Figure 3 As shown, the inspection vehicle 7 is rotated 90° using a cable wind rope, and the wire rope hand chain hoist 4 is connected to the gantry at both ends of the inspection vehicle 7.

[0017] Step 4: The mobile crane 6 and two sets of wire rope hand hoists 4 conversion systems work together to move the inspection vehicle 7 to the middle of the bridge box girder 1; during the movement, the steel wire of the mobile crane 6 is lowered, and the wire rope hand hoists 4 at both ends of the inspection vehicle 7 are retracted synchronously to ensure that the retraction and release rates are consistent and the inspection vehicle 7 is kept level at all times.

[0018] Step 5: Figure 6 As shown, two winch hooks 5 are connected to the gantry on both sides of the inspection vehicle 7, and the winch 3 and the wire rope hand chain hoist 4 work together to move the inspection vehicle 7 further to the middle of the bridge box girder 1. Specifically, during the movement, the winch 3 retracts the steel rope, and the wire rope hand chain hoist 4 lowers the steel rope until the inspection vehicle 7 moves to the bottom of the lifting point. Figure 8 and Fig. 9 As shown, the hoisting system of the winch 3 is fully stressed and the wire rope hand winch 4 is removed.

[0019] Step 6: Use the winch 3 lifting system to lift the inspection vehicle 7 until it is lifted onto the track 2. After the inspection vehicle 7 is connected to the track 2, the lifting and installation is completed.

[0020] Specifically, in actual operation, in order to avoid friction between the side of the bridge box girder 1 and the steel rope of the automobile crane 6, an additional guide wheel can be installed on the side of the bridge box girder 1.

[0021] In the specific construction process, the operation is completed on the bridge deck, avoiding the influence of the water surface under the bridge. Depending on the construction site, guide wheels can also be added on the bridge deck or the side of the bridge to move the winch 3 to the bridge deck to further facilitate the operation.

[0022] It is to be understood that the present invention is described by some embodiments, and it is known to those skilled in the art that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.

Claims

1. A bridge box girder bottom inspection vehicle hoisting construction method, characterized in that: The steps include: Step 1: Install a winch (3) on the bridge cap, and lay and fix a guide pulley (5) and a track (2) at the bottom of the bridge box girder (1); Step 2: Install the wire rope hand chain hoist (4) on the outside and bottom of the bridge box girder (1), and complete the layout of the wire rope hand chain hoist (4) conversion lifting fixed point; Step 3: Using a truck crane (6) to hoist the inspection vehicle (7) to the bridge pier on the bridge box girder (1), the construction personnel enter the inspection vehicle (7), use the cable wind rope to rotate the inspection vehicle 90 degrees, and connect the wire rope hand chain hoist (4) to the gantry at both ends of the inspection vehicle (7); Step 4: The mobile crane (6) and the two sets of wire rope hand hoists (4) conversion systems work together to move the inspection vehicle (7) to the middle of the bridge box girder (1); Step 5: Connect the two hoist hooks (5) to the gantries on both sides of the inspection vehicle (7) respectively, and the hoist (3) and the wire rope hand chain hoist (4) cooperate to move the inspection vehicle (7) further to the middle of the bridge box girder (1) until the inspection vehicle (7) is moved to the bottom of the lifting point, the hoisting system of the hoist (3) is fully stressed, and the wire rope hand chain hoist (4) is removed; Step 6: Use the winch (3) to lift the inspection vehicle (7) until it is lifted onto the track (2). After the inspection vehicle (7) is connected to the track (2), the lifting and installation is completed.

2. The method for hoisting and constructing a bridge box girder bottom inspection vehicle according to claim 1 is characterized in that: A fixed hanging point is arranged at the bottom of the bridge box girder (1), a guide pulley (5) is installed on the hanging point, and a winch (3) is installed on the bridge cap using chemical anchor bolts.

3. The method for hoisting and constructing a bridge box girder bottom inspection vehicle according to claim 2 is characterized in that: The wire rope hand chain hoist (4) is provided with two switching lifting fixing points, one point being arranged on the outside of the box beam and the other point being arranged on the outside track (2).

4. The method for hoisting and constructing a bridge box girder bottom inspection vehicle according to claim 3 is characterized in that: In step 4, the inspection vehicle (7) is moved to the outer side of the box girder and the wire rope hand hoist (4) on the outer track is stressed, while the truck crane (6) is not stressed, and the hook of the truck crane (6) is removed.

5. The method for hoisting and constructing a bridge box girder bottom inspection vehicle according to claim 4 is characterized in that: In the step 4, during the moving process, the vehicle crane (6) is lowered and at the same time, the wire rope hand winches (4) at both ends of the vehicle (7) are checked for synchronous contraction.

6. The method for hoisting and constructing a bridge box girder bottom inspection vehicle according to claim 5 is characterized in that: In steps 4 and 5, the inspection vehicle (7) is kept level.

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