Suspension bridge special-shaped steel beam hoisting method

Abstract

The invention provides a suspension bridge special-shaped steel beam hoisting method. The suspension bridge special-shaped steel beam hoisting method comprises the following steps that (1) hoisting tools are symmetrically installed on the two longitudinal end faces of a special-shaped steel beam; (2) two temporary cable clamps are installed on the main cable, hoisting equipment is fixed to the two temporary cable clamps correspondingly, and then an anchor head of the hoisting equipment is connected with a hoisting tool; and (3) the hoisting equipment is started, and the special-shaped steel beam is hoisted to the set position. The longitudinal bridge direction lifting lugs and the transverse bridge direction lifting lugs are connected with the transverse partition plates of the special-shaped steel beams and the joints of the transverse partition plates and the longitudinal partition plates correspondingly, then the connecting plates, the steel plate strips and the lifting steel cables are connected with lifting equipment, and lifting of the special-shaped steel beams is achieved. The method is low in construction cost, safe, reliable and convenient to install and disassemble, the hoisting problem of the special-shaped steel beam is solved, and beneficial reference can be provided for other similar engineering construction.

Description

Technical Field

[0001] The present invention belongs to the technical field of suspension bridge construction, and particularly relates to a method for hoisting special-shaped steel girders of a suspension bridge. Background Art

[0002] Steel box girders are widely used in current bridges in China due to their high strength, light self-weight, convenient construction, saving of formwork supports, environmental protection and durability, wide application range, etc. In recent years, with the continuous development of bridge technology in China, the bridge span has become larger and larger.

[0003] The suspension bridge is the bridge type with the strongest spanning ability. The main girders of the suspension bridge are divided into two types: steel box girders and trusses, and the bridge type layout is also divided into two-span (three or four spans) continuous or single-span double-hinged main girder structures. The installation of the main girder is one of the key processes in the construction of the suspension bridge.

[0004] The lifting lugs for hoisting the steel box girders of the suspension bridge are generally located at the top of the steel box girder. Most of the lifting tools are designed as box-shaped structures, which have good strength, stability and strong versatility. However, some steel box girders located at transition piers or pylons are designed as special-shaped structures. When using a hydraulic lifting device suspended on the main cable for hoisting, the lifting lugs need to be set directly below the hoisting equipment to prevent the lifting lugs from being twisted during hoisting and causing safety accidents. However, since the steel box girder is a special-shaped structure and the width of the steel box girder is smaller than the distance between the main cables, it is impossible to set lifting lugs on the top surface of the steel box girder directly below the main cable for hoisting. Summary of the Invention

[0005] The purpose of the present invention is to provide a method for hoisting special-shaped steel girders of a suspension bridge to overcome the above technical problems existing in the prior art.

[0006] Therefore, the technical solution provided by the present invention is as follows: A method for hoisting special-shaped steel girders of a suspension bridge, comprising the following steps: Step 1) Symmetrically install hoisting tools on the longitudinal end faces of the special-shaped steel girder; Step 2) Install two temporary cable clamps on the main cable, then fix the hoisting equipment on the two temporary cable clamps respectively, and then connect the anchor heads of the hoisting equipment and the hoisting tools; Step 3) Start the hoisting equipment and hoist the special-shaped steel girder to the set position.

[0007] The hoisting tool includes a longitudinal bridge lifting lug, a transverse bridge lifting lug and a connecting plate. The longitudinal bridge lifting lug and the transverse bridge lifting lug are fixedly connected by a connecting steel section. The longitudinal bridge lifting lug and the transverse bridge lifting lug are both pin-connected with steel strips, and the other ends of the steel strips are both pin-connected with the connecting plate. The top end of the connecting plate is connected with the hoisting equipment. The longitudinal bridge direction lifting lug includes a first connecting plate and a first vertical plate. The first vertical plate is vertically fixed on the first connecting plate and there are two parallel ones. At the top of the two first vertical plates, a first top plate is fixed. On the first top plate, there is a first lifting lug plate and an upper stiffening plate. The upper stiffening plates are symmetrically arranged on both sides of the first lifting lug plate. The upper stiffening plate is perpendicular to the first vertical plate. On the two first vertical plates, lower stiffening plates are symmetrically arranged. The lower stiffening plate is perpendicular to the first vertical plate. The top of the lower stiffening plate is fixedly connected to the first top plate. The upper stiffening plate and the lower stiffening plate are on the same straight line. Inside the first lifting lug plate, there is a first circular ring plate.

[0008] The transverse bridge direction lifting lug includes a second connecting plate and a second vertical plate. The second vertical plate is vertically fixed on the second connecting plate and there are two parallel ones. At the top of the two second vertical plates, a second top plate is fixed. On the second top plate, there is a second lifting lug plate and a stiffening plate. The stiffening plates are symmetrically arranged on both sides of the second lifting lug plate. The stiffening plate is parallel to the second vertical plate and on the same straight line. Inside the second lifting lug plate, there is a second circular ring plate.

[0009] The longitudinal bridge direction lifting lug is fixed on the diaphragm plate of the special-shaped steel beam. The transverse bridge direction lifting lug is fixed at the junction of the diaphragm plate and the longitudinal diaphragm plate of the special-shaped steel beam.

[0010] The upper stiffening plate is a trapezoidal stiffening plate, and the lower stiffening plate is a rectangular stiffening plate.

[0011] The connecting steel section is fixedly connected to the lower stiffening plate.

[0012] The stiffening plate is trapezoidal, and the connecting steel section is fixedly connected to the second vertical plate.

[0013] The connecting plate is a steel plate, having a triangular structure and connection holes are provided at all three vertices.

[0014] At both ends of the steel plate strip, connection holes are provided. The connection holes at one end are connected to the connecting plate through a pin shaft, and the connection holes at the other end are connected to the longitudinal bridge direction lifting lug or the transverse bridge direction lifting lug through a pin shaft.

[0015] The beneficial effects of the present invention are: The method for hoisting the special-shaped steel beam of the suspension bridge provided by the present invention realizes the hoisting of the special-shaped steel beam by connecting the longitudinal bridge direction lifting lug and the transverse bridge direction lifting lug to the diaphragm plate of the special-shaped steel beam and the junction of the diaphragm plate and the longitudinal diaphragm plate respectively, and then using the connecting plate, the steel plate strip and the hoisting steel cable to connect the hoisting equipment.

[0016] The hoisting tool for the special-shaped steel beam has a simple structure, low construction cost, safety and reliability, convenient installation and disassembly, solves the hoisting problem of the special-shaped steel beam, and can provide beneficial reference for the construction of other similar projects. Description of the Drawings

[0017] Figure 1 is an elevation view of an embodiment of the present invention; Figure 2 is a side view of an embodiment of the present invention; Figure 3 is a top view of an embodiment of the present invention; Figure 4 is an elevation view of an embodiment of the longitudinal bridge - direction hanger; Figure 5 is a side view of an embodiment of the longitudinal bridge - direction hanger; Figure 6 is an elevation view of an embodiment of the transverse bridge - direction hanger; Figure 7 is a side view of an embodiment of the transverse bridge - direction hanger; Figure 8 is an elevation view of on - site hoisting of the special - shaped steel girder; Figure 9 is a side view of on - site hoisting of the special - shaped steel girder; Figure 10 is a plan view of on - site hoisting of the special - shaped steel girder.

[0018] In the figure: 1. connecting plate; 2. steel strip; 3. longitudinal bridge - direction hanger; 31. first hanger plate; 32. first ring plate; 33. upper stiffening plate; 34. lower stiffening plate; 35. first connecting plate; 36. first vertical plate; 37. first bolt; 38. first top plate; 4. transverse bridge - direction hanger; 41. second hanger plate; 42. second ring plate; 43. stiffening plate; 44. second vertical plate; 45. second connecting plate; 46. second bolt; 47. second top plate; 5. connecting section steel; 6. special - shaped steel girder; 61. transverse diaphragm; 62. longitudinal diaphragm; 7. hoisting equipment; 8. temporary cable clamp; 9. main cable. Detailed implementation manners

[0019] The following specific embodiments illustrate the implementation manners of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification.

[0020] Now, refer to the accompanying drawings to introduce the exemplary implementation manners of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to disclose the present invention in detail and completely, and to fully convey the scope of the present invention to those skilled in the art. The terms in the exemplary implementation manners shown in the accompanying drawings are not limitations on the present invention. In the drawings, the same units / components are denoted by the same reference numerals.

[0021] Unless otherwise specified, the terms used herein (including technical terms) have the ordinary meaning understood by those skilled in the relevant technical field. Additionally, it can be understood that terms defined in commonly used dictionaries should be construed as having a meaning consistent with the context of their relevant fields, and should not be construed as idealized or overly formal meanings.

[0022] Embodiment 1 This embodiment provides a method for hoisting special-shaped steel girders of a suspension bridge. As Figure 8 shown, it includes the following steps: Step 1) Symmetrically install hoisting slings on the end faces of the special-shaped steel girder 6 in the longitudinal direction. Step 2) Install two temporary cable clamps 8 on the main cable 9, then fix the hoisting equipment to the two temporary cable clamps 8 respectively, and then connect the anchor heads of the hoisting equipment and the hoisting slings. Step 3) Start the hoisting equipment 7 and hoist the special-shaped steel girder 6 to the set position.

[0023] In the present invention, by symmetrically installing hoisting slings on the end faces of the special-shaped steel girder 6 in the longitudinal direction and then connecting the hoisting steel cables to the hoisting equipment 7 respectively, it is possible to prevent safety accidents caused by torsion during hoisting.

[0024] Embodiment 2 On the basis of Embodiment 1, this embodiment provides a method for hoisting special-shaped steel girders of a suspension bridge. As Figure 1 、 Figure 2 and Figure 3 shown, the hoisting sling includes a longitudinal bridge ear 3, a transverse bridge ear 4 and a connecting plate 1. The longitudinal bridge ear 3 and the transverse bridge ear 4 are fixedly connected by a connecting section steel 5. The longitudinal bridge ear 3 and the transverse bridge ear 4 are both pin-connected with steel strips 2, and the other ends of the steel strips 2 are both pin-connected with the connecting plate 1. The top end of the connecting plate 1 is connected to the hoisting equipment 7. For the method for hoisting special-shaped steel girders of a suspension bridge provided by the present invention, when hoisting the special-shaped steel girder 6, hoisting slings are symmetrically arranged on the end faces of the special-shaped steel girder 6. The longitudinal bridge ear 3 and the transverse bridge ear 4 are respectively connected to the diaphragm 61 of the special-shaped steel girder 6 and the intersection of the diaphragm 61 and the longitudinal diaphragm 62. Then, the longitudinal bridge ear 3 and the transverse bridge ear 4 are fixedly connected by the connecting section steel 5. Then, the longitudinal bridge ears 3 and the transverse bridge ears 4 at both ends are pin-connected to the connecting plate 1 through the steel strips 2, and the two connecting plates 1 are respectively connected to the hoisting equipment 7 through hoisting steel cables to realize the hoisting of the special-shaped steel girder 6.

[0025] Embodiment 3 On the basis of Embodiment 2, this embodiment provides a method for hoisting special-shaped steel girders of a suspension bridge. As Figure 4As shown in the figure, the longitudinal bridge direction hanger 3 includes a first connecting plate 35 and a first vertical plate 36. The first vertical plate 36 is vertically fixed on the first connecting plate 35 and there are two parallel ones. At the top of the two first vertical plates 36, a first top plate 38 is fixedly provided. On the first top plate 38, a first hanger plate 31 and an upper stiffening plate 33 are provided. The upper stiffening plates 33 are symmetrically arranged on both sides of the first hanger plate 31. The upper stiffening plate 33 is perpendicular to the first vertical plate 36. On the two first vertical plates 36, lower stiffening plates 34 are symmetrically provided. The lower stiffening plate 34 is perpendicular to the first vertical plate 36. The top of the lower stiffening plate 34 is fixedly connected to the first top plate 38. The upper stiffening plate 33 and the lower stiffening plate 34 are on the same straight line. Inside the first hanger plate 31, a first ring plate 32 is provided.

[0026] As Figure 4 shown in the figure, in this embodiment, the first vertical plate 36 is a right trapezoid. As Figure 1 shown in the figure, the connecting steel section 5 is fixedly connected to the lower stiffening plate 34. The upper stiffening plate 33 is a trapezoidal stiffening plate, and the lower stiffening plate 34 is a rectangular stiffening plate. By the upper stiffening plate 33 and the lower stiffening plate 34, the stiffness and strength of the longitudinal bridge direction hanger 3 are improved, so that it can bear a greater load without damage.

[0027] Embodiment 4 Based on Embodiment 2, this embodiment provides a hoisting method for the special-shaped steel beam of a suspension bridge. As Figure 6 shown in the figure, the transverse bridge direction hanger 4 includes a second connecting plate 45 and a second vertical plate 44. The second vertical plate 44 is vertically fixed on the second connecting plate 45 and there are two parallel ones. At the top of the two second vertical plates 44, a second top plate 47 is fixedly provided. On the second top plate 47, a second hanger plate 41 and a stiffening plate 43 are provided. The stiffening plates 43 are symmetrically arranged on both sides of the second hanger plate 41. The stiffening plate 43 is parallel to the second vertical plate 44 and on the same straight line. Inside the second hanger plate 41, a second ring plate 42 is provided.

[0028] As Figure 6 shown in the figure, in this embodiment, the second vertical plate 44 is a right trapezoid. As Figure 1 shown in the figure, the connecting steel section 5 is fixedly connected to the second vertical plate 44. The stiffening plate 43 is trapezoidal and is used to improve the stiffness and strength of the transverse bridge direction hanger 4.

[0029] Embodiment 5 Based on Embodiment 2, this embodiment provides a hoisting method for the special-shaped steel beam of a suspension bridge. The longitudinal bridge direction hanger 3 is fixedly provided on the diaphragm 61 of the special-shaped steel beam 6, and the transverse bridge direction hanger 4 is fixedly provided at the intersection of the diaphragm 61 and the longitudinal diaphragm 62 of the special-shaped steel beam 6.

[0030] As Figure 3 and Figure 5 shown in the figure, the longitudinal bridge direction hanger 3 is fixed on the diaphragm 61 of the special-shaped steel beam 6 through a first bolt 37. As Figure 3And Figure 7 As shown in Figure 7 , the transverse bridge ear 4 is fixed at the intersection of the transverse diaphragm 61 and the longitudinal diaphragm 62 of the special-shaped steel beam 6 (i.e., the end of the special-shaped steel beam 6 along the length direction) by the second bolt 46.

[0031] Embodiment 6 Based on Embodiment 2, this embodiment provides a hoisting method for the special-shaped steel beam of a suspension bridge, including a connecting plate 1, a steel strip 2, a longitudinal bridge ear 3, a transverse bridge ear 4, and a connecting section steel 5.

[0032] The connecting plate 1 is made of steel plate and is generally triangular in structure. There are 3 connecting holes on the connecting plate 1. The upper connecting hole is used to connect the hoisting equipment 7, and the two lower connecting holes are used to connect the steel strip 2.

[0033] The steel strip 2 is made of steel plate. Connecting holes are provided at both ends thereof. The connecting hole at one end is fixed to the connecting plate 1 by a pin shaft, and the connecting holes at the other end are respectively fixed to the longitudinal bridge ear 3 and the transverse bridge ear 4 by pin shafts.

[0034] The longitudinal bridge ear 3 is composed of a first ear plate 31, a first ring plate 32, a trapezoidal stiffening plate (upper stiffening plate 33), a rectangular stiffening plate (lower stiffening plate 34), a first connecting plate 35, a first vertical plate 36, a first bolt 37, and a first top plate 38. Two first ring plates 32 are attached to the inner side of the first ear plate 31 to enhance the strength and stability of the first ear plate 31. The first vertical plate 36 is in the same line as the first ear plate 31. The trapezoidal stiffening plate and the rectangular stiffening plate are in the same line. The first connecting plate 35 is fixed to the transverse diaphragm 61 of the special-shaped steel beam 6 by the first bolt 37.

[0035] The transverse bridge ear 4 is composed of a second ear plate 41, a second ring plate 42, a trapezoidal stiffening plate (stiffening plate 43), a second vertical plate 44, a second connecting plate 45, a second bolt 46, and a second top plate 47. Two second ring plates 42 are attached to the inner side of the second ear plate 41 to enhance the strength and stability of the second ear plate 41. The second vertical plate 44 is in the same line as the trapezoidal stiffening plate. The second connecting plate 45 is fixed at the intersection of the transverse diaphragm 61 and the longitudinal diaphragm 62 inside the special-shaped steel beam 6 by the second bolt 46.

[0036] The connecting section steel 5 adopts an I-shaped steel structure and is respectively connected to the lower stiffening plate 34 of the longitudinal bridge ear 3 and the second vertical plate 44 of the transverse bridge ear 4 at both ends to enhance the overall strength and stability of the hoisting tool.

[0037] During hoisting, as Figure 8 、 Figure 10 shown, two sets of hoisting tools for the special-shaped steel beam of the suspension bridge are respectively connected to both ends of the special-shaped steel beam 6 and hoisted by the hoisting equipment 7.

[0038] The usage process is as follows: 1. When processing the special-shaped steel girder 6, the bolt holes corresponding to the longitudinal bridge ear 3 and the transverse bridge ear 4 are processed in advance, and then the special-shaped steel girder 6 is transported to the hoisting position by ship.

[0039] 2. The longitudinal bridge ear 3, the transverse bridge ear 4, and the connecting section steel 5 are processed into a whole in advance, and then they are respectively connected to the special-shaped steel girder 6 by bolt 1 37 and bolt 2 46.

[0040] 3. Install the steel strip 2: The connecting holes at one end of the steel strip 2 are connected to the round holes on the ear plate 1 31 of the longitudinal bridge ear 3 and the ear plate 2 41 of the transverse bridge ear 4 through a pin shaft.

[0041] 4. Install the connecting plate 1: The two holes below the connecting plate 1 are connected to the connecting holes on the steel strip 2 through a pin shaft.

[0042] 5. Install the temporary cable clamp 8 on the main cable 9, then fix the hoisting device 7 on the temporary cable clamp 8, and connect the anchor head of the hoisting device 7 to the connecting hole on the connecting plate 1. Start the hoisting device 7 to hoist the steel box girder to the designed position. As Figure 9 shown.

[0043] The above examples are only illustrative of the present invention and do not constitute a limitation on the protection scope of the present invention. Any design identical or similar to the present invention falls within the protection scope of the present invention.

Claims

1. A hoisting method for special-shaped steel girders of a suspension bridge, characterized in that: It includes the following steps: Step 1) Symmetrically install hoisting slings on both longitudinal end faces of the special-shaped steel girder; Step 2) Install two temporary cable clamps on the main cable, then fix the hoisting equipment on the two temporary cable clamps respectively, and then connect the anchor heads of the hoisting equipment and the hoisting slings; Step 3) Start the hoisting equipment and hoist the special-shaped steel girder to the set position.

2. The hoisting method for the special-shaped steel beam of a suspension bridge according to claim 1, wherein: The hoisting sling includes a longitudinal bridge ear, a transverse bridge ear and a connecting plate. The longitudinal bridge ear and the transverse bridge ear are fixedly connected by a connecting steel section. Both the longitudinal bridge ear and the transverse bridge ear are pin-connected with steel strips. The other ends of the steel strips are both pin-connected with the connecting plate, and the top end of the connecting plate is connected with the hoisting equipment.

3. A method for hoisting a special-shaped steel beam of a suspension bridge according to claim 2, characterized in that: The longitudinal bridge ear includes a first connecting plate and a first vertical plate. The first vertical plate is vertically fixed on the first connecting plate and is two parallel plates. A first top plate is fixedly arranged at the top of the two first vertical plates. A first ear plate and an upper stiffening plate are arranged on the first top plate. The upper stiffening plates are symmetrically arranged on both sides of the first ear plate. The upper stiffening plate is perpendicular to the first vertical plate. Lower stiffening plates are symmetrically arranged on the two first vertical plates. The lower stiffening plate is perpendicular to the first vertical plate. The top of the lower stiffening plate is fixedly connected with the first top plate. The upper stiffening plate and the lower stiffening plate are on the same straight line. A first circular ring plate is arranged inside the first ear plate.

4. A method for hoisting a special-shaped steel beam of a suspension bridge according to claim 2, characterized in that: The transverse bridge ear includes a second connecting plate and a second vertical plate. The second vertical plate is vertically fixed on the second connecting plate and is two parallel plates. A second top plate is fixedly arranged at the top of the two second vertical plates. A second ear plate and a stiffening plate are arranged on the second top plate. The stiffening plates are symmetrically arranged on both sides of the second ear plate. The stiffening plate is parallel to the second vertical plate and on the same straight line. A second circular ring plate is arranged inside the second ear plate.

5. A method for hoisting a special-shaped steel beam of a suspension bridge according to claim 2, characterized in that: The longitudinal bridge ear is fixedly arranged on the diaphragm of the special-shaped steel girder, and the transverse bridge ear is fixedly arranged at the intersection of the diaphragm and the longitudinal diaphragm of the special-shaped steel girder.

6. A method for hoisting special-shaped steel girders of a suspension bridge according to claim 3, characterized in that: The upper stiffening plate is a trapezoidal stiffening plate, and the lower stiffening plate is a rectangular stiffening plate.

7. A hoisting method for special-shaped steel girders of a suspension bridge according to claim 3, characterized in that: The connecting steel section is fixedly connected with the lower stiffening plate.

8. A hoisting method for special-shaped steel girders of a suspension bridge according to claim 4, characterized in that: The stiffening plate is trapezoidal, and the connecting steel section is fixedly connected with the second vertical plate.

9. A method for hoisting a special-shaped steel beam of a suspension bridge according to any one of claims 1-8, characterized in that: The connecting plate is a steel plate, showing a triangular structure and having connecting holes at all three vertices.

10. A method for hoisting a special-shaped steel beam of a suspension bridge according to any one of claims 1-8, characterized in that: Both ends of the steel strip are provided with connecting holes. The connecting holes at one end are connected with the connecting plate through a pin shaft, and the connecting holes at the other end are connected with the longitudinal bridge ear or the transverse bridge ear through a pin shaft.

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