Large-span steel truss girder floating support-integral traction dragging device and combined construction method

Abstract

The invention provides a large-span steel truss girder uplift-overall traction and dragging device and a combined construction method. The large-span steel truss girder uplift-overall traction and dragging device comprises a steel truss girder, an uplift device, an overall traction and dragging device and a temporary supporting structure. The steel truss girder is arranged on the overall traction dragging device, and the steel truss girder is simply supported on the temporary supporting structure through pushing of the overall traction dragging device. And when the front supporting point of the steel truss girder is supported on the floating supporting device, the floating supporting device runs towards the opposite bank of the channel, so that the whole steel truss girder crosses over the channel. And when the front supporting point of the steel truss girder is supported on the opposite bank pier top and the rear supporting point is supported on the pushing end pier top, the whole erection of the steel truss girder is completed. According to the large-span steel truss girder floating-overall traction and dragging combined construction method, an underwater support does not need to be erected, channel passing is not affected, the erecting construction efficiency is high, and the construction method is simple, convenient and easy to implement and wide in application range.

Description

Technical Field

[0001] The invention belongs to the technical field of steel truss beam bridge construction, and in particular relates to a large-span steel truss beam floating-integral traction and dragging device and a combined construction method. Background Art

[0002] When a large-span steel truss bridge crosses a waterway, the commonly used construction method is to erect a support and assemble it. However, the erection of the support is restricted by the passage of the waterway, and the long construction period of erecting the support and splicing the steel truss bridge seriously affects the passage of the waterway. In recent years, the top-pushing construction method has attracted attention due to its large spanning capacity and high construction efficiency, and its application has gradually increased. However, the traditional top-pushing construction method requires the erection of a temporary top-pushing support in the waterway, which also affects the passage of the waterway. The support needs to be driven into the riverbed to a certain depth to meet the bearing capacity requirements of the large-span truss foundation during top-pushing construction. However, a hard riverbed will greatly increase the difficulty of driving the support into the bottom of the bed for construction, and a weak riverbed will increase the settlement of the support and affect the line shape of the large-span truss bridge during construction. Summary of the invention

[0003] In order to solve the above problems, the present invention discloses a large-span steel truss beam floating-integral traction and towing device and a combined construction method. The steel truss beam is arranged on the integral traction and towing device. The steel truss beam is simply supported on a temporary support structure through the push of the integral traction and towing device. When the front fulcrum of the steel truss beam is supported on the floating device, the floating device is moved toward the opposite bank of the waterway so that the steel truss beam crosses the waterway as a whole. When the front fulcrum of the steel truss beam is supported on the top of the pier on the opposite bank and the rear fulcrum is supported on the top of the pier at the top push end, the overall erection of the steel truss beam is completed.

[0004] A large-span steel truss beam floating-integral traction and towing device comprises a steel truss beam, a floating device, an integral traction and towing device, and a temporary support structure. The steel truss beam is arranged on the integral traction and towing device, and is pushed by the integral traction and towing device so that the steel truss beam is simply supported on the temporary support structure and the top-pushing end pier. When the front fulcrum of the steel truss beam is supported on the floating device, the floating device is moved toward the opposite bank of the waterway so that the steel truss beam as a whole crosses the waterway. When the front fulcrum of the steel truss beam is supported on the top of the pier on the opposite bank, and the rear fulcrum is supported on the top of the top-pushing end pier, the overall erection of the steel truss beam is completed.

[0005] Furthermore, the floating device is composed of a pre-buried anchor, a forward cable, a direction control cable and a floating device. The pre-buried anchor of the floating device is set at the opposite bank pier and the top push end pier, and the forward cable and the direction control cable are connected to the pre-buried anchor and the floating device respectively.

[0006] Furthermore, the pre-buried anchor is divided into a front pre-buried anchor and a rear pre-buried anchor. The front pre-buried anchor is arranged at the opposite bank pier, and the rear pre-buried anchor is arranged at the top push end pier.

[0007] Further, the forward cable is divided into a left forward cable and a right forward cable, the left forward cable is connected to the winch 1 on the floating device through the front pre-buried anchor 1, and the right forward cable is connected to the winch 2 on the floating device through the front pre-buried anchor 2.

[0008] Further, the direction control cable includes a front direction control cable and a rear direction control cable. The front direction control cable is composed of a front control cable 1 and a front control cable 2. The rear direction control cable is composed of a rear control cable 1 and a rear control cable 2. The front control cable 1 is connected to the front pre-buried anchor 1 and the winch 2, and the front control cable 2 is connected to the front pre-buried anchor 2 and the winch 1. The rear control cable 1 is connected to the winch 3 and the rear pre-buried anchor 2, and the rear control cable 2 is connected to the winch 4 and the rear pre-buried anchor 1.

[0009] Furthermore, the floating device is composed of a large floating ship, a floating support, and a distribution beam. The floating support is fixedly connected to the large floating ship through a foundation beam, and the steel truss beam is supported on the floating support through the distribution beam.

[0010] Furthermore, the overall traction and dragging device is composed of a reaction seat rear anchor, a horizontal jack, a support component, a steel strand and a slider. The steel strand passes through the horizontal jack, the support component and the reaction seat rear anchor in sequence and is anchored on the reaction seat rear anchor. The horizontal jack is pushed on the support component, and the steel truss beam slides along the slider through the push of the horizontal jack.

[0011] Further, the combined construction method comprises the following steps: Steel truss beams are assembled on temporary support structures; An integral traction and dragging device is arranged at the lower part of the steel truss beam to pull the steel truss beam until the node of the steel truss beam is supported at the top-pushing end pier; The floating device is floated to the position of the front support point of the steel truss beam, and the distribution beam of the floating device is lifted up so that the front support point of the steel truss beam falls on the distribution beam; Start the left forward cable and the right forward cable of the floating device, and control the direction of the steel truss girder by adjusting the front direction control cable and the rear direction control cable, so that the steel truss girder moves forward along the left forward cable and the right forward cable; When the front support of the steel truss beam reaches the position of the opposite bank pier and is supported on the opposite bank pier, the rear support of the steel truss beam is supported on the top-pushing end pier, the steel truss beam is floated and towed into place as a whole, the floating device and the overall towing and towing device are removed, and the steel truss beam is dropped onto the permanent support, completing the construction of the steel truss beam.

[0012] The beneficial effects of the present invention, compared with the prior art: No need to set up temporary supports in water. The present invention uses a floating device to pull the large-span steel truss beam to the other side of the channel, avoiding the cumbersome construction process of setting up large steel pipe piles for setting up supports in water, and also avoiding the potential safety hazard of subsidence of temporary supports in water during construction.

[0013] The device is modularly produced and can be adjusted to suit different steel truss beam floating-overall traction and towing construction, making it suitable for large-scale factory production.

[0014] High bearing capacity, stable and controllable construction process. During the floating-overall traction and dragging construction process, the steel truss beam is towed by a floating device at the front, and the running direction of the steel truss beam is adjusted by the front and rear control cables. At the same time, the overall traction and dragging device can greatly improve the stability of the steel truss beam. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic plan view of the floating-integrated traction and dragging device of the present invention.

[0016] Figure 2 It is a plan view of the floating device of the present invention.

[0017] Figure 3 It is a side elevation schematic diagram of the floating device of the present invention.

[0018] Figure 4 It is a schematic side elevation view of a floating device of the present invention.

[0019] Figure 5 It is a structural schematic diagram of the floating support of the present invention being connected to a large floating vessel via a foundation beam.

[0020] Figure 6 It is a schematic diagram of the overall traction and dragging device of the present invention.

[0021] List of reference numerals: 1 is a steel truss beam, 2 is a floating device, 21 is a pre-buried anchor, 22 is a forward cable, 23 is a direction control cable, 24 is a floating device, 3 is an integral traction and dragging device, 31 is a reaction seat rear anchor, 32 is a horizontal jack, 33 is a supporting component, 34 is a steel strand, 35 is a slider, 4 is a temporary supporting structure, 5 is a front fulcrum, 7 is an opposite bank pier, 8 is a rear fulcrum, 9 is a top-pushing end pier, 10 is a winch one, 11 is a winch two, 12 is a winch three, 13 is a winch four, and 14 is a node. DETAILED DESCRIPTION

[0022] The present invention is further explained below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the following specific embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to directions in the accompanying drawings, and the words "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.

[0023] like Figure 1 , Figure 2 As shown, a large-span steel truss beam floating-integral traction and towing device of this embodiment includes: a steel truss beam 1, a floating device 2, an integral traction and towing device 3, and a temporary support structure 4. The steel truss beam 1 is arranged on the integral traction and towing device 3, and the steel truss beam is simply supported on the temporary support structure 4 and the top-pushing end pier 9 by the push of the integral traction and towing device 3. When the front fulcrum of the steel truss beam is supported on the floating device 2, the steel truss beam 1 is moved across the waterway as a whole by the movement of the floating device 2 to the opposite bank. When the front fulcrum 5 of the steel truss beam 1 is supported on the top of the opposite bank pier 7, and the rear fulcrum 8 is supported on the top of the top-pushing end pier 9, the overall erection of the steel truss beam 1 is completed.

[0024] like Figure 3 As shown, the floating device 2 is composed of a pre-buried anchor 21, a forward cable 22, a direction control cable 23 and a floating device 24. The pre-buried anchor 21 of the floating device 2 is arranged at the opposite bank pier 7 and the top push end pier 9, and the forward cable 22 and the direction control cable 23 are connected to the pre-buried anchor 21 and the floating device 24 respectively.

[0025] like Figure 3 As shown, the pre-buried anchor 21 is divided into a front pre-buried anchor 211 and a rear pre-buried anchor 212 . The front pre-buried anchor 211 is arranged at the opposite bank pier 7 , and the rear pre-buried anchor 212 is arranged at the top-pushing end pier 9 .

[0026] like Figure 3 As shown, the forward cable 22 is divided into a left forward cable 221 and a right forward cable 222. The left forward cable 211 is connected to the winch 10 on the floating device 24 through the front pre-buried anchor 1 211A. The right forward cable 222 is connected to the winch 2 11 on the floating device 24 through the front pre-buried anchor 2 211B.

[0027] like Figure 3As shown, the direction control cable 23 includes a front direction control cable 231 and a rear direction control cable 232. The front direction control cable 231 is composed of a front control cable 1 231A and a front control cable 2 231B. The rear direction control cable 232 is composed of a rear control cable 1 232A and a rear control cable 2 232B. The front control cable 1 231A is connected to the front pre-buried anchor 1 211A and the winch 2 11, and the front control cable 2 231B is connected to the front pre-buried anchor 2 211B and the winch 1 10. The rear control cable 1 232A is connected to the winch 3 12 and the rear pre-buried anchor 2 212B, and the rear control cable 2 232B is connected to the winch 4 13 and the rear pre-buried anchor 1 212A.

[0028] like Figure 4 , Figure 5 As shown, the floating device 24 is composed of a large floating ship 241, a floating support 242, and a distribution beam 243. The floating support 242 is fixedly connected to the large floating ship 241 through a base beam 243, and the steel truss beam 1 is supported on the floating support 242 through the distribution beam 243.

[0029] like Figure 6 As shown, the integral traction and dragging device 3 is composed of a reaction seat rear anchor 31, a horizontal jack 32, a support component 33, a steel strand 34 and a slider 35. The steel strand 34 passes through the horizontal jack 32, the support component 33 and the reaction seat rear anchor 31 in sequence and is anchored on the reaction seat rear anchor 31. The horizontal jack 32 is pushed on the support component 33, and the steel truss beam 1 slides along the slider 35 through the push of the horizontal jack 32.

[0030] like Figure 1 to Figure 6 As shown, the combined construction method includes the following steps: The steel truss beam 1 is assembled on the temporary support structure 4; An integral traction and dragging device 3 is provided at the lower part of the steel truss beam 1 to pull the steel truss beam 1 until the node 14 of the steel truss beam 1 is supported at the top-pushing end pier 9; The floating device 2 is floated to the position of the front support point 5 of the steel truss beam 1, and the distribution beam 243 of the floating device 2 is lifted up so that the front support point 5 of the steel truss beam 1 falls on the distribution beam 243; Start the left forward cable 221 and the right forward cable 222 of the floating device 2, and control the direction of the steel truss girder 1 by adjusting the front direction control cable 231 and the rear direction control cable 232, so that the steel truss girder 1 moves forward along the left forward cable 221 and the right forward cable 222; When the front support point 5 of the steel truss beam 1 reaches the position of the opposite bank pier 7 and is supported on the opposite bank pier 7, the rear support point 8 of the steel truss beam 1 is supported on the top-pushing end pier 9, the steel truss beam 1 is floated-towed in place as a whole, the floating device 2 and the overall towing and towing device 3 are removed, and the steel truss beam 1 is dropped onto the permanent support, completing the construction of the steel truss beam 1.

[0031] The technical means disclosed in the scheme of the present invention are not limited to the technical means disclosed in the above-mentioned implementation mode, but also include technical schemes composed of any combination of the above technical features.

Claims

1. A large-span steel truss beam floating-integral traction and towing device, characterized in that: The invention comprises a steel truss beam (1), a floating device (2), an integral traction and towing device (3), and a temporary support structure (4); wherein the steel truss beam (1) is arranged on the integral traction and towing device (3), and is pushed by the integral traction and towing device (3) so that the steel truss beam is simply supported on the temporary support structure (4) and the top-pushing end pier (9); a front support point (5) and a rear support point (8) are respectively provided at the bottom of the steel truss beam (1); when the front support point of the steel truss beam is supported on the floating device (2), the floating device (2) moves toward the opposite bank of the waterway so that the steel truss beam (1) as a whole crosses the waterway; when the front support point (5) of the steel truss beam (1) is supported on the top of the opposite bank pier (7), and the rear support point (8) is supported on the top of the top-pushing end pier (9), the overall erection of the steel truss beam (1) is completed.

2. A large-span steel truss beam floating-integrated traction and towing device according to claim 1, characterized in that: The floating device (2) is composed of a pre-buried anchor (21), a forward cable (22), a direction control cable (23) and a floating device (24); the pre-buried anchor (21) is divided into a front pre-buried anchor (211) and a rear pre-buried anchor (212); the front pre-buried anchor (211) is arranged at the opposite bank pier (7), and the rear pre-buried anchor (212) is arranged at the top-pushing end pier (9); the forward cable (22) and the direction control cable (23) are respectively connected to the direction control cable (23), the pre-buried anchor (21) and the floating device (24).

3. A large-span steel truss beam floating-integrated traction and dragging device according to claim 2, characterized in that: The forward cable (22) is divided into a left forward cable (221) and a right forward cable (222). The left forward cable (211) is connected to the winch 1 (10) on the floating device (24) via the front pre-buried anchor 1 (211A); the right forward cable (222) is connected to the winch 2 (11) on the floating device (24) via the front pre-buried anchor 2 (211B).

4. A large-span steel truss beam floating-integrated traction and towing device according to claim 2, characterized in that: The direction control cable (23) comprises a front direction control cable (231) and a rear direction control cable (232); the front direction control cable (231) is composed of a front control cable 1 (231A) and a front control cable 2 (231B); the rear direction control cable (232) is composed of a rear control cable 1 (232A) and a rear control cable 2 (232B); the front control cable 1 (231A) is connected to a front pre-buried anchor 1 (211A) and a winch 2 (11), and the front control cable 2 (231B) is connected to a front pre-buried anchor 2 (211B) and a winch 1 (10); the rear control cable 1 (232A) is connected to a winch 3 (12) and a rear pre-buried anchor 2 (212B), and the rear control cable 2 (232B) is connected to a winch 4 (13) and a rear pre-buried anchor 1 (212A).

5. A large-span steel truss beam floating-integrated traction and towing device according to claim 2, characterized in that: The floating device (24) is composed of a large floating ship (241), a floating support (242), and a distribution beam (243). The floating support (242) is fixedly connected to the large floating ship (241) via a foundation beam (243), and the steel truss beam (1) is supported on the floating support (242) via the distribution beam (243).

6. A large-span steel truss beam floating-integrated traction and dragging device according to claim 1, characterized in that: The integral traction and dragging device (3) is composed of a reaction seat rear anchor (31), a horizontal jack (32), a supporting component (33), a steel strand (34) and a sliding block (35); the steel strand (34) sequentially passes through the horizontal jack (32), the supporting component (33) and the reaction seat rear anchor (31) and is anchored on the reaction seat rear anchor (31); the horizontal jack (32) is supported on the supporting component (33), and the steel truss beam (1) slides along the sliding block (35) through the pushing of the horizontal jack (32).

7. A large-span steel truss beam floating-integral traction and dragging combined construction method, characterized in that: The combined construction method includes the following steps: Step 1: The steel truss beam (1) is assembled on the temporary support structure (4); Step 2: an integral traction and pulling device (3) is arranged at the lower part of the steel truss beam (1), and the steel truss beam (1) is pulled until the node (14) of the steel truss beam (1) is supported at the top-pushing end pier (9); Step 3: float the floating device (2) to the position of the front support point (5) of the steel truss beam (1), and lift the distribution beam (243) of the floating device (2) so that the front support point (5) of the steel truss beam (1) falls on the distribution beam (243); Step 4: Start the left forward cable (221) and the right forward cable (222) of the floating device (2), and control the direction of the steel truss beam (1) by adjusting the front direction control cable (231) and the rear direction control cable (232), so that the steel truss beam (1) moves forward along the left forward cable (221) and the right forward cable (222); Step 5: When the front support (5) of the steel truss beam (1) reaches the position of the opposite bank pier (7) and is supported on the opposite bank pier (7), the rear support (8) of the steel truss beam (1) is supported on the top push end pier (9), the steel truss beam (1) is floated-towed in place as a whole, the floating device (2) and the overall towing and towing device (3) are removed, and the steel truss beam (1) is dropped onto the permanent support, completing the construction of the steel truss beam (1).

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