Deck type arch bridge steel beam hoisting method

Abstract

The invention discloses a deck type arch bridge steel beam hoisting method which comprises the steps that firstly, at least two on-arch hoisting tools are installed on a main arch ring, two winches are started, and the winches vertically hoist steel beam sections, and secondly, jacks are started to pull the winches and the steel beam sections to transversely move; thirdly, the connection between the steel beam section and the winch is removed, the steel beam section is hoisted through a cable crane, a locking piece between the suspension arm and the arch stand column is unscrewed, and the suspension arm is rotated by 90 degrees; and fourthly, the steel beam sections are moved to an assembling platform through a cable crane. According to the deck type arch bridge steel beam hoisting method, vertical hoisting and horizontal transverse moving of the steel beam sections are mainly achieved through the on-arch hoisting tool, horizontal transverse moving can be rapidly achieved, meanwhile, a transverse moving support does not need to be erected in the whole process, steel is saved, the problem that a transverse moving platform is difficult to erect under the complex terrain condition is effectively solved, and in addition, the construction efficiency is improved. And the hoisting speed can be improved, and the construction period is shortened.

Description

Technical Field

[0001] The invention particularly relates to a method for hoisting steel beams of a top-supported arch bridge. Background Art

[0002] The existing construction method for hoisting the arch bridge section is as follows: first, a transverse support is set up, and the beam section is hoisted to the transverse platform by a cable crane. After the cable crane moves the beam section transversely to the specified position, the cable crane is used to hoist the beam section longitudinally to the corresponding position. The following problems may occur during the construction of the cable crane:

[0003] Firstly, a large amount of steel is required to build a transverse platform before the cable crane can be used. Secondly, it is difficult to set up a transverse platform under the complex terrain conditions of mountainous canyons. Finally, the cable crane has a low operating speed and needs to be moved back and forth repeatedly. The lifting trajectory is long and the construction period is long. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a method for hoisting a steel beam of a deck arch bridge.

[0005] In order to solve the above-mentioned technical problems, the present invention adopts the following technical solutions:

[0006] A method for hoisting a steel beam of a deck arch bridge comprises the following steps:

[0007] Step 1: at least two arch hoists are installed on the main arch ring, each of which includes an arch column, a boom is provided on the arch column, a locking piece is provided between the boom and the arch column, a winch is provided on the boom, and a jack is provided on one side of the winch; after the winch is connected to the steel beam segment, the jack pulls the winch and the steel beam segment to move synchronously; the boom can rotate relative to the arch column after the connection with the locking piece is released; the steel beam segment is transported to the bottom of the main arch ring of the top-bearing arch bridge, and the two ends of the steel beam segment are respectively connected and fixed to the winch of the corresponding arch hoist, and then the two winches are started at the same time, and the winch lifts the steel beam segment vertically;

[0008] Step 2: After completing step 1, start the jack to pull the winch and the steel beam segment to move horizontally;

[0009] Step 3: After completing step 2, release the connection between the steel beam segment and the winch. The steel beam segment is lifted by a cable crane. When the cable crane removes the steel beam segment from the arch hoist, loosen the locking piece between the boom and the arch column, and rotate the boom 90 degrees.

[0010] Step 4: Use a cable crane to move the steel beam segment to the assembly platform.

[0011] Preferably, the locking member is a bolt.

[0012] Preferably, the boom is a truss-type cantilever member.

[0013] The beneficial effects of the present invention are:

[0014] In the method for lifting the steel beams of an arch bridge of the present application, the arch hoist is mainly used to realize the vertical lifting and horizontal transverse movement of the steel beam segment. Compared with the existing construction method of cable hoisting to repeatedly change the anchor point to realize the movement, the arch hoist of the present application can quickly realize the horizontal transverse movement. There is no need to set up a transverse movement bracket during the whole process, which saves steel and effectively solves the problem of difficulty in setting up a transverse movement platform under complex terrain conditions. In addition, it can also increase the lifting speed and shorten the construction period. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0016] Figure 1 This is a structural schematic diagram of the main arch ring of this application without the arch hanger installed;

[0017] Figure 2 A schematic diagram of the structure of the main arch ring of the present application with the arch hoisting device installed;

[0018] Figure 3 This is a schematic diagram of the structure of a rotating arch hanger for a top-bearing arch bridge in this application. Figure 1 ;

[0019] Figure 4 This is a schematic diagram of the working of the rotating arch hanger of the top-supported arch bridge on the main arch ring of this application Figure 1 ;

[0020] Figure 5 This is a schematic diagram of the structure of a rotating arch hanger for a top-bearing arch bridge in this application. Figure 2 ;

[0021] Figure 6 This is a schematic diagram of the structure of a rotating arch hanger for a top-bearing arch bridge in this application. Figure 3 ;

[0022] Figure 7 This is a schematic diagram of the structure of a rotating arch hanger for a top-bearing arch bridge in this application. Figure 4 ;

[0023] Figure 8 This is a schematic diagram of the structure of a rotating arch hanger for a top-bearing arch bridge in this application. Figure 5 ;

[0024] Fig. 9 This is a schematic diagram of the structure of a rotating arch hanger for a top-bearing arch bridge in this application. Figure 6 ;

[0025] Fig.10 This is a schematic diagram of the working of the rotating arch hanger of the top-supported arch bridge on the main arch ring of this application Figure 2 ;

[0026] Fig.11 This is a schematic diagram of the working of the rotating arch hanger of the top-supported arch bridge on the main arch ring of this application Figure 3 ;

[0027] Fig.12 This is a schematic diagram of the working of the rotating arch hanger of the top-supported arch bridge on the main arch ring of this application Figure 4 ;

[0028] Fig.13 This is a schematic diagram of the working of the rotating arch hanger of the top-supported arch bridge on the main arch ring of this application Figure 5 . DETAILED DESCRIPTION

[0029] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions.

[0030] The orientation shown in the drawings cannot be understood as limiting the specific protection scope of the present invention, but is only provided for reference and understanding of the preferred embodiments. The product components shown in the drawings may be changed in position, increased in number, or simplified in structure.

[0031] The "connection" described in the specification and the mutual "connection" relationship of the components shown in the drawings can be understood as a fixed connection or a detachable connection or an integral connection; it can be a direct connection or a connection through an intermediate medium. Ordinary technicians in this field can understand the connection relationship according to the specific circumstances and can derive different implementation methods in an appropriate manner such as screwing, riveting, welding, clamping or embedding.

[0032] With respect to the directional words such as up, down, left, right, top, bottom, etc. described in the specification and the directions shown in the drawings, the components may be in direct contact or in contact through other features between them; for example, "above" may mean directly above or obliquely above, or it simply means higher than other objects; other directions may be understood by analogy.

[0033] The materials for making parts with solid shapes shown in the specification and the drawings may be metal materials, non-metal materials or other synthetic materials; the mechanical processing techniques used for parts with solid shapes may be stamping, forging, casting, wire cutting, laser cutting, injection molding, CNC milling, 3D printing, machining, etc.; ordinary technicians in this field can adaptively select or combine them according to different processing conditions, costs, and precisions, but are not limited to the above-mentioned materials and manufacturing processes.

[0034] A method for hoisting steel beams of a deck arch bridge, referring to Figure 1-Figure 13 , including the following steps:

[0035] Step 1: at least two arch hoists 1 are installed on the main arch ring 1-1, each arch hoist 1 includes an arch column 11, a boom 12 is arranged on the arch column 11, a locking piece 13 is arranged between the boom 12 and the arch column 11, a winch 14 is arranged on the boom 12, and a jack 15 is arranged on one side of the winch 14; after the winch 14 is connected to the steel beam segment 2, the jack 15 pulls the winch 14 and the steel beam segment 2 to move synchronously; the boom 12 can rotate relative to the arch column 11 after releasing the connection with the locking piece 13; the steel beam segment 2 is transported to the bottom of the main arch ring 1-1 of the top-bearing arch bridge, and the two ends of the steel beam segment 2 are respectively connected and fixed to the winch 14 of the corresponding arch hoist 1, and then the two winches 14 are started at the same time, and the winch 14 lifts the steel beam segment 2 vertically;

[0036] Step 2: After completing step 1, start the jack 15 to pull the winch 14 and the steel beam segment 2 to move horizontally;

[0037] Step 3: After completing step 2, release the connection between the steel beam segment 2 and the winch 14, and use the cable crane 1-2 to lift the steel beam segment 2. When the cable crane 1-2 removes the steel beam segment 2 from the arch hoist 1, loosen the locking piece 13 between the boom 12 and the arch column 11, and rotate the boom 90 degrees.

[0038] Step 4: Use the cable crane 1-2 to move the steel beam segment 2 to the assembly platform 1-3.

[0039] Furthermore, the locking member 13 is a bolt.

[0040] Furthermore, the boom 12 is a truss-type cantilever component.

[0041] The working principle of the present invention is:

[0042] The present application takes the hoisting construction process of the steel beam segment 2 of a supported arch bridge as an example to illustrate the design principle of the rotary arch hoist 1 of the present application.

[0043] Arch hoist 1: Arch hoist 1 is used for vertical lifting and lateral movement of steel beam segment 2;

[0044] Arch assembly platform 1-3: Arch assembly platform 1-3 is used for temporary storage and splicing of steel beam segments 2;

[0045] Cable crane 1-2: used for longitudinal lifting of steel beam segment 2.

[0046] Figure 1It is a structural schematic diagram of the main arch ring 1-1 without the arch hanger 1 installed;

[0047] Step 1: Two arch hoists 1 are installed on the main arch ring 1-1, and the arch hoists 1 are used to vertically hoist the steel beam segment 2, and the steel beam segment 2 is transported to the bottom of the main arch ring 1-1 of the top-bearing arch bridge. The two ends of the steel beam segment 2 are respectively connected to the winches 14 of the corresponding arch hoists 1. The ends of the steel beam segment 2 are generally fixed on the hoisting ropes of the winches 14. Figure 2 The application of the arch hanger 1 on the main arch ring 1-1, Figure 3 is a schematic diagram of the state of the arch hoist 1; then the two winches 14 are started at the same time, and the winches 14 can vertically lift the steel beam segment 2 to the corresponding position, such as Figure 4-Figure 5 As shown;

[0048] Step 2: After completing step 1, Figure 6-Figure 7 As shown, the jack 15 is started to pull the winch 14 and the steel beam segment 2 to move horizontally to the left; when the steel beam segment 2 needs to move horizontally to the right, a hand winch 120 can be provided on the boom 12, and the hand winch 120 is used to pull the winch 14 to move to the right, thereby driving the steel beam segment 2 to move horizontally to the right.

[0049] Step 3: After completing step 2, Figure 8 As shown, the connection between the steel beam segment 2 and the winch 14 is released, and the steel beam segment 2 is hoisted by the cable crane 1-2. When the cable crane 1-2 removes the steel beam segment 2 from the arch hoist 1, the bolts between the boom 12 and the arch column 11 are released, and the boom is rotated 90 degrees in the horizontal direction to prevent the boom 12 from interfering with the movement of the steel beam segment 2. Figure 9-10 As shown, at this time, the boom is placed on the arch column 11 by its own gravity; the boom 12 mentioned above is preferably a truss-type cantilever component.

[0050] Step 4: Use the cable crane 1-2 to move the steel beam segment 2 to the assembly platform 1-3, such as Figure 11-12 As shown, Fig.13 This is a schematic diagram of the structure after lifting multiple steel beam segments. Fig.12 Regarding the application scenario of the jack 15, the application scenario at this time is for tunnel operations. Since the cable crane 1-2 cannot operate in the tunnel, the jack 15 is placed in the tunnel, and the steel beam segment 2 is dragged into the tunnel using the jack 15.

[0051] In the technical solution of the present application, the arch hoist 1 on the main arch ring 1-1 is mainly used to realize the vertical lifting and horizontal transverse movement of the steel beam segment 2. Compared with the existing construction method of repeatedly changing the anchor point of the cable hoist 1-2 to realize the movement, the arch hoist 1 of the present application can quickly realize the horizontal transverse movement, and there is no need to set up a transverse movement bracket during the whole process, which saves steel and effectively solves the problem of difficulty in setting up a transverse movement platform under complex terrain conditions. In addition, it can also increase the lifting speed and shorten the construction period.

[0052] In the above technical solution, since the cable crane can achieve longitudinal and lateral movement, which is a conventional means in this technical field and is not the main design concept of this application, its working principle will not be described in detail herein.

[0053] Although the present invention is described in detail with reference to the above embodiments, it is obvious to those skilled in the art through this disclosure that various changes or modifications may be made to the present invention without departing from the principle and spirit of the present invention defined by the claims. Therefore, the detailed description of the embodiments of the present disclosure is only used to explain, not to limit the present invention, but the scope of protection is limited by the content of the claims.

Claims

1. A method for hoisting a steel beam of a deck arch bridge, characterized in that: The following steps are included: Step 1: at least two arch hoists (1) are installed on the main arch ring (1-1), each arch hoist (1) comprises an arch column (11), a suspension arm (12) is arranged on the arch column (11), a locking member (13) is arranged between the suspension arm (12) and the arch column (11), a winch (14) is arranged on the suspension arm (12), and a jack (15) is arranged on one side of the winch (14); after the winch (14) is connected to the steel beam segment (2), The jack (15) pulls the winch (14) and the steel beam segment (2) to move synchronously; the boom (12) can rotate relative to the arch column (11) after releasing the connection with the locking member (13); the steel beam segment (2) is transported to the bottom of the main arch ring (1-1) of the top-bearing arch bridge, and the two ends of the steel beam segment (2) are respectively connected and fixed to the winch (14) of the corresponding arch hoist (1), and then the two winches (14) are started at the same time, and the winches (14) vertically lift the steel beam segment (2); Step 2: After completing step 1, start the jack (15) to pull the winch (14) and the steel beam segment (2) to move horizontally; Step 3: After completing step 2, release the connection between the steel beam segment (2) and the winch (14), and use the cable crane (1-2) to lift the steel beam segment (2). When the cable crane (1-2) removes the steel beam segment (2) from the arch hoist (1), loosen the locking piece (13) between the boom (12) and the arch column (11), and rotate the boom (12) 90 degrees. Step 4: Use the cable crane (1-2) to move the steel beam segment (2) to the assembly platform (1-3).

2. A method for hoisting steel beams of a deck arch bridge according to claim 1, characterized in that: The locking member (13) is a bolt.

3. The method for hoisting steel beams of a deck arch bridge according to claim 1, characterized in that: The suspension arm (12) is a truss-type cantilever component.

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