Construction method for replacing railing of bridge in active service

Abstract

The invention provides a construction method for replacing an active-service bridge handrail. The construction method comprises the following steps that a protection device for replacing construction of the active-service bridge handrail is adopted for construction; the protection device comprises a moving unit, a stabilizing unit, a transverse telescopic unit, a vertical telescopic unit and a protection unit. The upper portion of the moving unit is fixedly connected with a stabilizing unit. The top of the stabilizing unit is connected with one end of a transverse telescopic unit. The end, away from the stabilizing unit, of the transverse telescopic unit is connected with the top end of the vertical telescopic unit. The lower end of the vertical telescopic unit is connected with one side of the protection unit, and the active bridge handrail is located above the protection unit; under the condition that under-bridge traffic is guaranteed to be normally carried out, the existing bridge handrail can be replaced and maintained, and the protection convenience is effectively improved; and time and labor are saved during erection, and personnel safety is effectively guaranteed.

Description

Technical Field

[0001] The invention belongs to the technical field of bridge engineering, and in particular relates to a construction method for replacing railings of an existing bridge. Background Art

[0002] During the long-term use of urban bridges and highway bridges, the guardrails on both sides are often damaged earlier due to material reasons. Therefore, the replacement and repair of guardrails is an important and frequent work of bridge maintenance. However, during the construction process, due to the edge when the guardrails are removed and installed, there is no suitable stress point and position to set up formal edge protection. Therefore, safety protection during the replacement of the guardrails and ensuring traffic under the bridge have become a problem.

[0003] At present, in order to ensure traffic safety, the traffic under the bridge is generally interrupted and closed for construction, but this will cause traffic congestion and bring inconvenience to people's travel; if the recommended protection is set up to ensure normal traffic, the simple protection will have great safety hazards and will not be convenient for construction.

[0004] Therefore, it is urgent to design a construction method that can not interrupt the traffic under the bridge and ensure the safety of traffic participants and construction workers. Summary of the invention

[0005] The present invention provides a construction method for replacing an existing bridge guardrail, which is used to solve the problem in the prior art that it is impossible to ensure normal traffic and safety under the bridge when replacing and repairing the existing bridge guardrail.

[0006] The present invention provides a construction method for replacing an existing bridge railing, comprising the following steps: using a protective device for replacing an existing bridge railing for construction to perform construction; Wherein, the protection device comprises a moving unit, a stabilizing unit, a lateral telescopic unit, a vertical telescopic unit and a protection unit; The stabilizing unit is fixedly connected to the upper part of the movable unit, and the top of the stabilizing unit is connected to one end of the transverse telescopic unit; the end of the transverse telescopic unit away from the stabilizing unit is connected to the top of the vertical telescopic unit; the lower end of the vertical telescopic unit is connected to one side of the protective unit, and the active bridge railing is located above the protective unit.

[0007] Compared with the prior art, the advantages of the present invention lie in that: by adopting a protective device including a mobile unit, a stabilizing unit, a lateral telescopic unit, a vertical telescopic unit and a protective unit, the existing bridge railings can be replaced and repaired while ensuring the normal traffic under the bridge; the protective device can move and protect as the construction section moves, effectively improving the convenience of protection; the protective unit can be used as an anti-fall net and also as a hanging basket for artificial aerial work, realizing multiple uses of one machine; the protective device can be used in many scenarios, and the installation is time-saving and labor-saving, effectively ensuring the safety of personnel.

[0008] Furthermore, the mobile unit is a cart including a carriage, and a stabilizing unit is fixedly connected inside the carriage of the cart.

[0009] Furthermore, the stabilizing unit includes two groups of steel trusses and counterweights, and the two groups of steel trusses are arranged parallel and vertically and perpendicular to the existing bridge railings.

[0010] Furthermore, the transverse telescopic unit comprises a transverse fixed tube and a transverse movable tube, and the transverse fixed tube and the transverse movable tube are nested and slidably connected; One end of the transverse fixed tube away from the transverse movable tube is fixedly connected to the top of the stabilizing unit, and one end of the transverse movable tube away from the transverse fixed tube is connected to the top of the vertical telescopic unit.

[0011] Furthermore, the vertical telescopic unit comprises a steel truss which is telescopic in the vertical direction.

[0012] Furthermore, the protection unit is a steel platform frame with enclosure structures on all sides.

[0013] Furthermore, the outer facade of the protection unit is covered with a dense mesh protection net. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of a front view of a protective device in one embodiment of the present invention; Figure 2 It is a partial schematic diagram of a protective device in one embodiment of the present invention; Figure 3 It is a partial schematic diagram of a protective device in one embodiment of the present invention.

[0015] Explanation of the accompanying reference numerals: 1. Bridge body; 2. Moving unit; 3. Stabilizing unit; 4. Horizontal fixed tube; 5. Counterweight block; 6. Horizontal movable tube; 7. Vertical telescopic unit; 8. Protection unit; 9. Railing. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in combination with the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0017] See also Figure 1~Figure 3 , the present invention provides a construction method for replacing an existing bridge railing, comprising the following steps: using a protective device for replacing an existing bridge railing for construction to perform construction; The protection device includes a moving unit 2, a stabilizing unit 3, a lateral telescopic unit, a vertical telescopic unit 7 and a protection unit 8; A stabilizing unit 3 is fixedly connected to the upper part of the mobile unit 2, and the top of the stabilizing unit 3 is connected to one end of the transverse telescopic unit; the end of the transverse telescopic unit away from the stabilizing unit 3 is connected to the top of the vertical telescopic unit 7; the lower end of the vertical telescopic unit 7 is connected to one side of the protective unit 8, and the active bridge railing 9 is located above the protective unit 8.

[0018] The present invention adopts a protective device including a moving unit 2, a stabilizing unit 3, a lateral telescopic unit, a vertical telescopic unit 7 and a protective unit 8. It is possible to replace and repair the existing bridge railings 9 while ensuring the normal traffic under the bridge. The protective device can move and protect along with the construction section, effectively improving the convenience of protection. The protective unit 8 can be used as an anti-fall net and also as a hanging basket for artificial aerial work, realizing multiple uses of one machine. The protective device can be used in many scenarios, saves time and effort to set up, and effectively ensures the safety of personnel.

[0019] In a specific embodiment, the mobile unit 2 is a flatbed truck including a carriage, and a stabilizing unit 3 is fixedly connected to the carriage of the flatbed truck; the carriage body is made of steel, and a steel truss is welded to the bottom of the carriage body.

[0020] In a specific embodiment, the stabilizing unit 3 includes two sets of steel trusses and counterweights 5. The two sets of steel trusses are parallel and vertical and are arranged perpendicular to the existing bridge railings 9. The steel trusses are welded and installed on the transport trolley. There are two sets of left and right trusses, which are also connected by a steel frame in the middle. The counterweights 5 are sheet-shaped metal counterweights 5, and the number of pieces can be increased according to the weight requirements, and they are directly stacked in the carriage of the transport trolley.

[0021] In a specific embodiment, the transverse telescopic unit includes a transverse fixed tube 4 and a transverse movable tube 6, which are nested and slidably connected; one end of the transverse fixed tube 4 away from the transverse movable tube 6 is fixedly connected to the top of the stabilizing unit 3, and one end of the transverse movable tube 6 away from the transverse fixed tube 4 is connected to the top of the vertical telescopic unit 7; the transverse fixed tube 4 and the transverse movable tube 6 are high-strength square steel tubes; the transverse fixed tube 4 is two high-strength steel tubes, which are respectively connected to the steel trusses and have a hollow shape.

[0022] The vertical telescopic unit 7 includes a steel truss that can be telescoped vertically and is located on the vertical rod of the protection unit 8, so that the protection unit 8 can move up and down in the vertical direction within a certain range.

[0023] In a specific embodiment, the protection unit 8 is a steel platform frame with a surrounding enclosure structure; the outer facade of the protection unit 8 is covered with a dense mesh protection net. The protection unit 8 is a steel frame structure, and the steel frame is connected by a combination of small rods. It is assembled during work and can be disassembled and loaded for storage after completion. It is connected to the steel truss through high-strength square steel pipes, and assumes the main protection and anti-falling functions. When working, a dense mesh anti-falling net can be attached to the outer surface of the frame.

[0024] When in use, when the existing bridge railing 9 needs to be dismantled, installed and maintained, the protective device is towed to the top of the bridge body 1 by a driving vehicle, adjusted to a suitable position along the bridge, and the counterweight 5 is stacked according to the weight requirement. Then, the frame components are assembled and connected, and the horizontal distance of the protective unit 8 is adjusted by the length of the high-strength square steel pipe of the horizontal movable tube 6 to reach a suitable position, and then the vertical position of the protective unit 8 is adjusted by the vertical telescopic unit 7 to achieve the best protective effect. After the adjustment is completed, the facade of the protective unit 8 is covered with a dense mesh protective net to prevent the falling of fine broken objects and tools. After all are completed, the subsequent construction of the railing 9 can be carried out normally. The protective device can be moved with the change of the construction section. In addition, during the construction process, a steel plate is placed on the bottom plate of the frame. The device can also be used as a hanging basket for personnel construction, which can play a convenient high-altitude mobile construction, and the traffic under the bridge can proceed normally.

[0025] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein by equivalents. If these modifications and variations fall within the scope of the claims of the present invention and their equivalent technologies, they should be considered to be within the protection scope of the present invention.

Claims

1. A construction method for replacing the guardrails of an existing bridge, characterized in that: The following steps are involved: The construction is carried out using protective devices used for replacing the existing bridge railings; Wherein, the protection device comprises a moving unit, a stabilizing unit, a lateral telescopic unit, a vertical telescopic unit and a protection unit; The stabilizing unit is fixedly connected to the upper part of the movable unit, and the top of the stabilizing unit is connected to one end of the transverse telescopic unit; the end of the transverse telescopic unit away from the stabilizing unit is connected to the top of the vertical telescopic unit; the lower end of the vertical telescopic unit is connected to one side of the protective unit, and the active bridge railing is located above the protective unit.

2. The construction method for replacing the guardrails of an existing bridge according to claim 1 is characterized in that: The mobile unit is a flatbed truck including a carriage, and a stabilizing unit is fixedly connected inside the carriage of the flatbed truck.

3. The construction method for replacing the guardrails of an existing bridge according to claim 2 is characterized in that: The stabilizing unit includes two groups of steel trusses and counterweights, and the two groups of steel trusses are arranged in parallel and vertically, perpendicular to the existing bridge railings.

4. The construction method for replacing the guardrails of an existing bridge according to claim 3 is characterized in that: The transverse telescopic unit comprises a transverse fixed tube and a transverse movable tube, and the transverse fixed tube and the transverse movable tube are nested and slidably connected; One end of the transverse fixed tube away from the transverse movable tube is fixedly connected to the top of the stabilizing unit, and one end of the transverse movable tube away from the transverse fixed tube is connected to the top of the vertical telescopic unit.

5. The construction method for replacing the guardrails of an existing bridge according to claim 4 is characterized in that: The vertical telescopic unit comprises a steel truss which can be telescoped vertically.

6. The construction method for replacing the guardrails of an existing bridge according to claim 5 is characterized in that: The protection unit is a steel platform frame with enclosure structures on all sides.

7. The construction method for replacing the guardrails of an existing bridge according to claim 6, characterized in that: The outer facade of the protection unit is covered with a dense mesh protection net.

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