Butt joint method for steel truss girders of cable-stayed bridge

Abstract

The invention discloses a butt joint method for steel trussed beams of a cable-stayed bridge. The butt joint method comprises the steps that 1, equipment installation and connection are conducted, specifically, a winch is installed on a ground station, a ground rail is laid, and a walking system is installed on the ground rail; secondly, assembling is conducted through a beam erecting machine, wherein the assembled sections are transported to the rear end of the beam erecting machine through a bridge deck carrier on a ground rail; step 3, hoisting the steel truss girder: hanging a hoisting machine on a hoisting machine guide rail on the side surface of the girder erecting machine, and hoisting the steel truss girder by using the hoisting machine; and fourthly, steel truss girders are in butt joint, specifically, the steel truss girders are accurately placed and spliced to form a formed beam, and stay cables are fixed to the two sides of the formed beam. According to the method, through a beam erecting machine and a walking system, splicing sections are continuously spliced on the tail portion of the beam erecting machine to enable the whole beam erecting machine to be lengthened, and the whole beam erecting machine actually extends out of a forming beam to achieve synchronous hoisting and splicing of a plurality of sets of steel trussed beams. By means of the method, the mode that the steel truss girders are spliced one by one is changed, and the construction efficiency is greatly improved in the mode that a plurality of steel truss girders are synchronously hoisted, connected in a butt joint mode and synchronously constructed.

Description

Technical Field

[0001] The invention relates to the technical field of bridge construction, and in particular to a method for butting steel trusses of a cable-stayed bridge. Background Art

[0002] In the field of modern bridge construction, cable-stayed bridges have become one of the important forms of long-span bridges with their advantages such as strong spanning capacity, beautiful structure and reasonable force. As the key load-bearing structure of cable-stayed bridges, the docking quality and construction efficiency of steel trusses are directly related to the overall performance, safety and construction period of cable-stayed bridges. The traditional docking method of steel trusses for cable-stayed bridges has many limitations in practical applications. From the perspective of construction efficiency, the method of assembling steel trusses one by one is often adopted. In this way, each time a section of steel trusses is docked, the operation of the next section is carried out. The process is cumbersome and time-consuming. For example, in some large cable-stayed bridge construction projects, docking steel trusses one by one slows down the construction progress, seriously delays the construction period of the entire bridge, and increases the construction cost, including manpower, equipment rental, and site use.

[0003] As bridge construction develops towards larger spans and more complex environments, traditional steel truss beam docking methods are increasingly difficult to adapt to new engineering requirements. It is urgent to develop a cable-stayed bridge steel truss beam docking method that is efficient, accurate, has good equipment coordination, and adapts to complex environments to meet the needs of the ever-evolving modern bridge construction. Therefore, in order to better solve the above-mentioned shortcomings, the present invention proposes a cable-stayed bridge steel truss beam docking method. Summary of the invention

[0004] The purpose of the present invention is to solve at least one of the technical problems existing in the prior art, and to provide a method for docking steel trusses of a cable-stayed bridge. The method uses a beam erecting machine and a walking system, and continuously assembles assembly sections at the tail of the beam erecting machine to extend the entire beam, so that it extends into a formed beam, and mounts multiple sets of cranes on the extension section to achieve synchronous lifting and assembly of multiple sets of steel trusses.

[0005] Through this method, the way of assembling steel trusses one by one is changed to multiple synchronous lifting and docking and synchronous construction, which greatly improves the construction efficiency. Multiple groups of synchronous docking form a construction unit. The advantage is that the control of precision and timely adjustment after errors are more efficient.

[0006] The present invention also provides a method for docking the steel trusses of a cable-stayed bridge, comprising: a ground station and a cable-stayed tower, wherein a winch is installed on the ground station, a ground rail is laid on the ground station, a running system is installed on the ground rail, a beam erecting machine is installed on the upper end of the running system, a beam erecting machine is fixedly connected to the head end of the beam erecting machine with a beam erecting machine cable, and the beam erecting machine cable is connected to the winch; a crane guide rail is installed on the side surface of the beam erecting machine, a crane is mounted on the working surface of the crane guide rail, a steel truss is mounted on the bottom of the crane, the steel truss is formed into a shaped beam by splicing, both sides of the shaped beam are fixed with a cable, the other end of the cable is fixedly connected to the cable-stayed tower, a bridge deck carrier is installed on the ground rail, an assembling section is installed on the upper surface of the bridge deck carrier, and the assembling section is connected to the rear end of the beam erecting machine;

[0007] The docking method comprises the following steps:

[0008] Step 1: Equipment installation and connection: Install the winch on the ground station, lay the ground rail, install the running system on the ground rail, and then install the beam erector on the upper end of the running system. Fix one end of the beam erector cable to the head end of the beam erector, and connect the other end to the winch after passing through the fixed pulley block on the top of the inclined tower.

[0009] Step 2: Assembling the beam erector: transport the assembled section to the rear end of the beam erector by means of a bridge deck carrier on the ground rail, so that the beam erector is continuously extended;

[0010] Step 3: Hoisting of steel trusses: The crane is mounted on the crane rail on the side surface of the beam erecting machine, and the steel trusses are hoisted by the crane, and the steel trusses are transported to the docking position by moving the crane on the crane rail;

[0011] Step 4: Steel truss beam docking: accurately place and splice the steel trusses to form a formed beam, fix the inclined cables on both sides of the formed beam, and fix the other end of the inclined cables to the inclined tower to complete the steel truss beam docking.

[0012] According to a method for butting steel trusses of a cable-stayed bridge provided by the present invention, a fixed pulley block is installed on the top of the cable-stayed tower, and the cable of the beam erecting machine is connected to the winch through the other end of the fixed pulley block, so as to form a cable-stayed structure, and the beam erecting machine is kept stable by the cable of the beam erecting machine, thereby improving its load performance.

[0013] According to a method for butting steel trusses of a cable-stayed bridge provided by the present invention, a brake system is provided at the output end of the hoist, and the cable of the beam erecting machine is locked by the brake system, so as to maintain the tension of the beam erecting cable and ensure the stability of the beam erecting machine during operation.

[0014] According to a method for butt jointing steel trusses of a cable-stayed bridge provided by the present invention, the hoisting machines are provided in multiple groups, and the multiple groups of hoisting machines can perform synchronous operation, thereby achieving the hoisting and assembly of multiple steel trusses at the same time, and improving the overall butt jointing efficiency.

[0015] According to a method for butting steel trusses of a cable-stayed bridge provided by the present invention, the ground rails are connected in a multi-section assembly manner, and the ground rails extend to the upper surface of the formed beams to provide guidance for the beam erecting machine.

[0016] According to a method for butting steel trusses of a cable-stayed bridge provided by the present invention, the travel system is pushed by a horizontal hydraulic cylinder, and the upper surface of the travel system is kept absolutely horizontal. The travel system enables the beam erecting machine to achieve overall displacement.

[0017] According to a method for butting steel trusses of a cable-stayed bridge provided by the present invention, the shaped beams pass through the cable-stayed towers transversely, and the shaped beams are fixedly connected to the cable-stayed towers, thereby forming the entire basic bridge deck.

[0018] According to a method for butt jointing steel trusses of a cable-stayed bridge provided by the present invention, the assembly section is composed of multiple sections, and the horizontal height of the bridge deck carrier can be freely adjusted. The overall length of the beam erecting machine is extended by connecting multiple assembly sections, and the connection between the assembly section and the beam erecting machine is realized by freely adjusting the horizontal height of the bridge deck carrier.

[0019] Compared with the prior art, the present invention provides a method for docking steel trusses of a cable-stayed bridge. The method uses a beam erecting machine and a walking system, and continuously assembles assembly sections at the tail of the beam erecting machine to extend the entire beam, thereby extending a formed beam, and mounting multiple sets of cranes on the extension section to achieve synchronous lifting and assembly of multiple sets of steel trusses.

[0020] Compared with the prior art, the method for docking steel trusses of a cable-stayed bridge of the present invention changes the way of assembling steel trusses one by one to a method of multiple synchronous lifting and docking and synchronous construction, thereby greatly improving the construction efficiency. Multiple groups of synchronous docking form a construction unit, which has the advantage of more efficient control of accuracy and timely adjustment after errors occur. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention is further described below in conjunction with the accompanying drawings and embodiments;

[0022] Figure 1 It is an overall flow chart of a method for butting steel trusses of a cable-stayed bridge according to the present invention;

[0023] Figure 2 The present invention is a structural schematic diagram of the butt joint of steel trusses of a cable-stayed bridge.

[0024] Legend:

[0025] 1. Cable-stayed tower; 2. Formed beam; 3. Cable-stayed cable; 4. Ground rail; 5. Travel system; 6. Beam erecting machine; 7. Crane guide rail; 8. Hoist; 9. Steel truss; 10. Cable of beam erecting machine; 11. Bridge deck carrier; 12. Assembly section; 13. Ground station; 14. Winch. DETAILED DESCRIPTION

[0026] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0027] Reference Figure 1 , 2 The embodiment of the present invention provides a method for docking steel trusses of a cable-stayed bridge, which comprises: a ground station 13 and a cable-stayed tower 1. A winch 14 is installed on the ground station 13. A ground rail 4 is laid on the ground station 13. A running system 5 is installed on the ground rail 4. A beam erecting machine 6 is installed on the upper end of the running system 5. The head end of the beam erecting machine 6 is fixedly connected with a beam erecting machine cable 10, and the beam erecting machine cable 10 is connected to the winch 14. A brake system is provided at the output end of the winch 14, and the beam erecting machine cable 10 is locked by the brake system. The ground rail 4 is connected in a multi-section assembly manner, and the ground rail 4 extends to the upper surface of the formed beam 2. The running system 5 is pushed by a horizontal hydraulic cylinder, and the upper surface of the running system 5 remains absolutely horizontal.

[0028] The side surface of the beam erecting machine 6 is installed with a crane rail 7, and a crane 8 is mounted on the working surface of the crane rail 7. A steel truss 9 is mounted on the bottom of the crane 8. The steel truss 9 is spliced ​​to form a shaped beam 2. The two sides of the shaped beam 2 are fixed with inclined cables 3, and the other end of the inclined cables 3 is fixedly connected to the inclined tower 1. A bridge deck carrier 11 is installed on the ground rail 4. An assembly section 12 is installed on the upper surface of the bridge deck carrier 11. The assembly section 12 is connected to the rear end of the beam erecting machine 6; a fixed pulley block is installed on the top of the inclined tower 1, and the other end of the beam erecting machine cable 10 is connected to the winch 14 through the fixed pulley block. There are multiple groups of cranes 8, and multiple groups of cranes 8 can perform synchronous operation. The shaped beam 2 passes through the inclined tower 1 horizontally, and the shaped beam 2 is fixedly connected to the inclined tower 1. The assembly section 12 is composed of multiple sections, and the horizontal height of the bridge deck carrier 11 can be freely adjusted.

[0029] The docking method comprises the following steps:

[0030] Step 1, equipment installation and connection: install the winch 14 on the ground station 13, lay the ground rail 4, install the running system 5 on the ground rail 4, and then install the beam erecting machine 6 on the upper end of the running system 5, fix one end of the beam erecting machine cable 10 to the head end of the beam erecting machine 6, and the other end passes through the fixed pulley block at the top of the inclined tower 1 and is connected to the winch 14;

[0031] Step 2, assembling the beam erecting machine: transporting the assembly section 12 to the rear end of the beam erecting machine 6 by the bridge deck carrier 11 on the ground rail 4, so that the beam erecting machine 6 is continuously extended;

[0032] Step 3: hoisting the steel truss beam: the crane 8 is mounted on the crane guide rail 7 on the side surface of the beam erecting machine 6, and the steel truss beam 9 is hoisted by the crane 8, and the steel truss beam 9 is transported to the docking position by moving the crane 8 on the crane guide rail 7;

[0033] Step 4: Butt joint of steel trusses: accurately place and splice the steel trusses 9 to form a formed beam 2, fix the inclined cables 3 on both sides of the formed beam 2, and fix the other ends of the inclined cables 3 to the inclined tower 1 to complete the butt joint of the steel trusses 9.

[0034] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A method for butt jointing steel trusses of a cable-stayed bridge, characterized in that: include: A ground station (13) and a cable-stayed tower (1), wherein a winch (14) is installed on the ground station (13), a ground rail (4) is laid on the ground station (13), a running system (5) is installed on the ground rail (4), a beam erecting machine (6) is installed at the upper end of the running system (5), a beam erecting machine cable (10) is fixedly connected to the head end of the beam erecting machine (6), and the beam erecting machine cable (10) is connected to the winch (14); A crane guide rail (7) is installed on the side surface of the beam erecting machine (6), a crane (8) is mounted on the working surface of the crane guide rail (7), a steel truss beam (9) is mounted on the bottom of the crane (8), the steel truss beam (9) is spliced ​​to form a shaped beam (2), inclined cables (3) are fixed on both sides of the shaped beam (2), the other end of the inclined cables (3) is fixedly connected to the inclined tower (1), a bridge deck carrier (11) is installed on the ground rail (4), an assembly section (12) is installed on the upper surface of the bridge deck carrier (11), and the assembly section (12) is connected to the rear end of the beam erecting machine (6); The docking method comprises the following steps: Step 1, equipment installation and connection: install the winch (14) on the ground station (13), lay the ground rail (4), install the running system (5) on the ground rail (4), and then install the beam erecting machine (6) on the upper end of the running system (5), fix one end of the beam erecting machine cable (10) to the head end of the beam erecting machine (6), and connect the other end to the winch (14) after passing through the fixed pulley block at the top of the inclined tower (1); Step 2: assembling the beam erecting machine: transporting the assembly section (12) to the rear end of the beam erecting machine (6) by means of a bridge deck carrier (11) on the ground rail (4), so that the beam erecting machine (6) is continuously extended; Step 3: hoisting the steel truss beam: the crane (8) is mounted on the crane guide rail (7) on the side surface of the beam erecting machine (6), the steel truss beam (9) is hoisted by the crane (8), and the steel truss beam (9) is transported to the docking position by moving the crane (8) on the crane guide rail (7); Step 4: Butt joint of steel trusses: accurately place and splice the steel trusses (9) to form a shaped beam (2), fix the inclined cables (3) on both sides of the shaped beam (2), and make the other ends of the inclined cables (3) fixedly connected to the inclined tower (1), thereby completing the butt joint of the steel trusses (9).

2. The method for butting steel trusses of a cable-stayed bridge according to claim 1, characterized in that: A fixed pulley block is installed on the top of the inclined tower (1), and the beam erecting machine cable (10) is connected to the winch (14) via the other end of the fixed pulley block.

3. The method for butting steel trusses of a cable-stayed bridge according to claim 1, characterized in that: The output end of the hoist (14) is provided with a brake system, and the beam erecting machine cable (10) is locked by the brake system.

4. The method for butting steel trusses of a cable-stayed bridge according to claim 1, characterized in that: The hoisting machines (8) are provided in multiple groups, and the multiple groups of hoisting machines (8) can perform synchronous operations.

5. The method for butting steel trusses of a cable-stayed bridge according to claim 1, characterized in that: The ground rail (4) is connected in a multi-section assembly manner, and the ground rail (4) extends to the upper surface of the shaped beam (2).

6. The method for butting steel trusses of a cable-stayed bridge according to claim 1, characterized in that: The running system (5) is pushed by a horizontally placed hydraulic cylinder, and the upper surface of the running system (5) is kept absolutely horizontal.

7. The method for butting steel trusses of a cable-stayed bridge according to claim 1, characterized in that: The shaped beam (2) passes through the inclined tower (1) transversely, and the shaped beam (2) is fixedly connected to the inclined tower (1).

8. The method for butting steel trusses of a cable-stayed bridge according to claim 1, characterized in that: The assembly section (12) is composed of multiple sections, and the horizontal height of the bridge deck carrier (11) can be freely adjusted.

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