Continuous swinging and shifting device for eccentric steel beam in bank slope area of suspension bridge and construction method

Abstract

The invention provides a suspension bridge bank slope area eccentric steel beam continuous swinging and moving device and a construction method, and relates to the technical field of steel beam continuous swinging and moving, the suspension bridge bank slope area eccentric steel beam continuous swinging and moving device comprises a connecting steel plate, ear plate mechanisms are installed at the upper end and the lower end of the connecting steel plate, and a limiting mechanism is installed on each ear plate mechanism; the limiting mechanism can support the sling in the process of limiting the sling so as to prevent the sling from shaking; by means of the technical scheme, the cable loading crane and the extension sling are both facilities owned on site, additional machining and manufacturing are not needed, the machine tool and material turnover cost is saved, the bank slope area steel beam hoisting step is adjusted, the construction period is shortened, the construction cost is reduced, and the construction efficiency is improved. The problem of steel beam erection in the bank slope area is solved, erection of a steel beam sliding platform is omitted, the construction period can be shortened, risks are avoided, interference to the Three Gorges reservoir area and the channel is greatly reduced, environmental protection is achieved, and the construction cost can be controlled easily.

Description

Technical Field

[0001] The invention relates to the technical field of continuous swinging of steel beams, and in particular to a continuous swinging device and a construction method for an eccentric steel beam in a bank slope area of ​​a suspension bridge. Background Art

[0002] The swing-shift construction method is a construction method commonly used in large bridge construction. It mainly uses the coordinated use of suspension bridge cables and cranes to achieve the swing-shift construction of the beam. This method is efficient, safe and stable, and is suitable for bridge construction of various forms and sizes, especially in the construction of bridges with large spans and large beam weights.

[0003] At present, in the prior art, since the bridge is located in the backwater area of ​​the reservoir and is a U-shaped river valley, the water level of the Yangtze River cannot meet the demand for vertical lifting of the steel beams on the side of the side span close to the tower. At the same time, during the swinging construction process, the slings do not have a limiting support structure, which may cause the slings to shake, and the sling lifting is prone to instability. Therefore, the present invention proposes a continuous swinging device and construction method for eccentric steel beams in the slope area of ​​a suspension bridge. Summary of the invention

[0004] The purpose of the present invention is to solve the problem existing in the prior art that since the bridge is located in the backwater area of ​​the reservoir and is a U-shaped river valley, the water level of the Yangtze River cannot meet the demand for vertical lifting of the steel beams on the side of the side span close to the tower, and at the same time, during the swing construction process, the slings will shake due to the lack of a limiting support structure, which makes the sling lifting unstable.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a continuous swinging device for an eccentric steel beam in a slope area of ​​a suspension bridge, comprising a connecting steel plate, wherein the upper and lower ends of the connecting steel plate are provided with ear plate mechanisms, and a limiting mechanism is provided on each ear plate mechanism, and the limiting mechanism can also support the sling during the process of limiting the sling, so as to prevent the sling from shaking; each of the ear plate mechanisms comprises a fixed sheet metal, bolt mounting plates are fixedly connected to both sides of the upper end of the fixed sheet metal, a mounting groove is provided in the middle of the fixed sheet metal, a limiting ring is fixedly connected to the inner wall of the fixed sheet metal, a central shaft is rotatably installed in the mounting groove, a sleeve is fixedly connected to the central shaft, a movable sheet metal is fixedly connected to one side of the sleeve, and the movable sheet metal is located in the mounting groove.

[0006] In at least some embodiments, a sleeve shaft is fixedly connected to one side of the lower end of the movable sheet metal, a sling pulley is fixedly connected to the sleeve shaft, and a slide rail is fixedly connected to one side of the upper surface of the movable sheet metal.

[0007] In at least some embodiments, a sliding block is slidably installed in the slide rail, and a threaded sleeve is provided on the top of the movable sheet metal near the slide rail.

[0008] In at least some embodiments, tooth grooves are provided at both ends of the sleeve, a toothed plate is meshed and connected to one side of the tooth groove, and a U-shaped bracket is fixedly connected to one side of the toothed plate.

[0009] In at least some embodiments, a first electric push rod is fixedly connected to the lower end of the U-shaped bracket, and the first electric push rod is fixedly connected to the outer side wall of the fixed sheet metal.

[0010] In at least some embodiments, the limiting mechanism includes a driving motor, the driving motor is fixedly connected to one side of the slider, a driving lead screw is fixedly connected to the output shaft of the driving motor, the driving lead screw is meshed and connected to a threaded sleeve, and a connecting bracket is rotatably installed at the lower end of the driving lead screw.

[0011] In at least some embodiments, the connecting bracket is located above the sling wheel, side rotating seats are fixedly connected to both ends of the connecting bracket, a lower connecting rod is rotatably installed in each side rotating seat, and a side limiting wheel is rotatably installed at the lower end of each lower connecting rod. The side limiting wheels are located on both sides of the sling wheel.

[0012] In at least some embodiments, an upper connecting rod is fixedly connected to one end of each lower connecting rod, each upper connecting rod and the lower connecting rod are arranged in an L shape, a connecting piece is rotatably installed at the upper end of each upper connecting rod, a connecting block is rotatably installed between each connecting piece, a second electric push rod is fixedly connected to the lower surface of the connecting block, and the second electric push rod is fixedly connected to the upper surface of the upper limiting plate.

[0013] In at least some embodiments, for the eccentric steel beam continuous swinging device and construction method in the suspension bridge bank slope area, the specific construction method includes the following steps: S1. First, use sling connection lugs and pins to connect two slings with appropriate lengths, and the cable-suspended crane cooperates with the swinging and lengthening of the sling to hoist and swing the steel beam in the bank slope area; S2. Then, slowly lower the steel strand of the cable-suspended crane and move the cable-suspended crane, and cooperate with the lengthened sling to bear force to swing the steel beam; S3. Immediately after swinging and lifting to the design position of the side span, use the winch set on the approach bridge to horizontally tow the steel beam to be anchored and positioned on the steel beam bracket.

[0014] Compared with the prior art, the advantages and positive effects of the present invention are as follows: 1. In the present invention, when the first electric push rod is started, the first electric push rod drives the U-shaped bracket and the toothed plate to lift and lower, which can drive the movable sheet metal and the sleeve to rotate around the central axis, so that one end of the sleeve shaft on the movable sheet metal is inserted into the limiting ring, facilitating the installation of the sling. Then, start the driving motor to drive the connecting bracket and the upper limiting plate to lift and lower. The upper limiting plate further presses the sling on the sling wheel, improving the stability of the sling. At the same time, start the second electric push rod to drive the two side limiting wheels to move towards both sides of the sling, thereby limiting both ends of the sling to prevent violent shaking during the swinging process.

[0015] 2. In the present invention, the cable-supported crane and the extended sling are both on-site existing facilities, without the need for additional processing and manufacturing, saving the turnover costs of tools and materials. By adjusting the hoisting steps of the steel beams in the bank slope area, the problem of erecting the steel beams in the bank slope area is solved, eliminating the need to build a steel beam sliding platform, which can shorten the construction period and avoid risks, greatly reducing the interference to the Three Gorges Reservoir Area and the waterway, being environmentally friendly and conducive to controlling the construction cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional schematic view of the overall one-side structure of the eccentric steel beam continuous swinging device in the bank slope area of the suspension bridge proposed by the present invention; Figure 2 It is a three-dimensional schematic view of the overall other-side structure of the eccentric steel beam continuous swinging device in the bank slope area of the suspension bridge proposed by the present invention; Figure 3 It is a three-dimensional schematic view of the combined structure of the ear plate mechanism and the limit mechanism of the eccentric steel beam continuous swinging device in the bank slope area of the suspension bridge proposed by the present invention; Figure 4 It is a three-dimensional schematic view of a partial structure of the ear plate mechanism of the eccentric steel beam continuous swinging device in the bank slope area of the suspension bridge proposed by the present invention; Figure 5 It is a three-dimensional schematic view of another partial structure of the ear plate mechanism of the eccentric steel beam continuous swinging device in the bank slope area of the suspension bridge proposed by the present invention; Figure 6 It is a three-dimensional schematic view of the movable sheet metal structure of the eccentric steel beam continuous swinging device in the bank slope area of the suspension bridge proposed by the present invention; Figure 7 It is a three-dimensional schematic view of the overall structure of the limit mechanism of the eccentric steel beam continuous swinging device in the bank slope area of the suspension bridge proposed by the present invention; Figure 8 It is a three-dimensional schematic view of Step 1 of the construction method for the eccentric steel beam continuous swinging in the bank slope area of the suspension bridge proposed by the present invention; Figure 9 It is a three-dimensional schematic view of Step 2 of the construction method for the eccentric steel beam continuous swinging in the bank slope area of the suspension bridge proposed by the present invention; Figure 10 It is a three-dimensional schematic view of Step 3 of the construction method for the eccentric steel beam continuous swinging in the bank slope area of the suspension bridge proposed by the present invention; Figure 11 It is a three-dimensional schematic view of Step 4 of the construction method for the eccentric steel beam continuous swinging in the bank slope area of the suspension bridge proposed by the present invention; Figure 12 It is a three-dimensional schematic view of Step 5 of the construction method for the eccentric steel beam continuous swinging in the bank slope area of the suspension bridge proposed by the present invention.

[0017] Legend: 100, connecting steel plate; 200, ear plate mechanism; 300, limiting mechanism; 201, fixed sheet metal; 202, bolt mounting plate; 203, limiting ring; 204, mounting groove; 205, first electric push rod; 206, U-shaped bracket; 207, toothed plate; 208, tooth groove; 209, sleeve; 210, central shaft; 211, movable sheet metal; 212, sleeve shaft; 213, sling wheel; 214, slide rail; 215, slider; 216, threaded sleeve; 301, drive motor; 302, drive lead screw; 303, connecting bracket; 304, upper limit plate; 305, side rotating seat; 306, second electric push rod; 307, connecting block; 308, connecting piece; 309, upper connecting rod; 310, lower connecting rod; 311, side limit wheel. Detailed implementation mode

[0018] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments may be combined with each other.

[0019] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention may be implemented in other ways different from those described herein. Therefore, the present invention is not limited by the specific embodiments disclosed in the following specification.

[0020] Embodiment 1: According to Figures 1 - 7 , as Figure 1 shown, the eccentric steel beam continuous swinging device in the bank slope area of the suspension bridge provided by the embodiment of the present invention includes a connecting steel plate 100. The upper and lower ends of the connecting steel plate 100 are provided with ear plate mechanisms 200. A limiting mechanism 300 is installed on each of the ear plate mechanisms 200. The limiting mechanism 300 can also support the sling during the process of limiting the sling, so as to prevent the sling from shaking; Each of the ear plate mechanisms 200 includes a fixed sheet metal 201. Both sides of the upper end of the fixed sheet metal 201 are fixedly connected with bolt mounting plates 202. An installation groove 204 is opened in the middle of the fixed sheet metal 201. A limiting ring 203 is fixedly connected to the inner wall of the fixed sheet metal 201. A central shaft 210 is rotatably installed in the installation groove 204. A sleeve 209 is fixedly connected to the central shaft 210. One side of the sleeve 209 is fixedly connected with a movable sheet metal 211. The movable sheet metal 211 is located in the installation groove 204.

[0021] As Figures 3 - 6As shown in the figure, a sleeve shaft 212 is fixedly connected to one side of the lower end of the movable sheet metal 211. A sling wheel 213 is fixedly connected to the sleeve shaft 212. A slide rail 214 is fixedly connected to one side of the upper surface of the movable sheet metal 211. A slider 215 is slidably installed in the slide rail 214. A threaded sleeve 216 is provided on one side of the top of the movable sheet metal 211 near the slide rail 214. Tooth grooves 208 are provided at both ends of the sleeve 209. A toothed plate 207 is meshed and connected to one side of the tooth groove 208. A U-shaped bracket 206 is fixedly connected to one side of the toothed plate 207. A first electric push rod 205 is fixedly connected to the lower end of the U-shaped bracket 206. The first electric push rod 205 is fixedly connected to the outer side wall of the fixed sheet metal 201. The sling is sleeved on the sling wheel 213, and the sling wheel 213 is closely attached to the curved surface of the sling to increase the traction force of the sling. Subsequently, the first electric push rod 205 is started. The first electric push rod 205 drives the U-shaped bracket 206 and the toothed plate 207 to rise and fall, and can drive the movable sheet metal 211 and the sleeve 209 to rotate around the central axis 210, so that one end of the sleeve shaft 212 on the movable sheet metal 211 is inserted into the limit ring 203, which is convenient for installing the sling.

[0022] As Figure 7 As shown in the figure, the limiting mechanism 300 includes a driving motor 301. The driving motor 301 is fixedly connected to one side of the slider 215. The output shaft of the driving motor 301 is fixedly connected to a driving lead screw 302. The driving lead screw 302 is meshed and connected to the threaded sleeve 216. The lower end of the driving lead screw 302 is rotatably installed with a connecting bracket 303. The connecting bracket 303 is located above the sling wheel 213. Both ends of the connecting bracket 303 are fixedly connected with side rotating seats 305. A lower connecting rod 310 is rotatably installed in each side rotating seat 305. A side limiting wheel 311 is rotatably installed at the lower end of each lower connecting rod 310. The side limiting wheels 311 are located on both sides of the sling wheel 213. One end of each lower connecting rod 310 is fixedly connected with an upper connecting rod 309. Each upper connecting rod 309 and the lower connecting rod 310 are arranged in an L shape. A connecting member 308 is rotatably installed at the upper end of each upper connecting rod 309. A connecting block 307 is rotatably installed between each connecting member 308. A second electric push rod 306 is fixedly connected to the lower surface of the connecting block 307. The second electric push rod 306 is fixedly connected to the upper surface of the upper limiting plate 304. The driving motor 301 is started to drive the driving lead screw 302 to rotate. The driving lead screw 302 is meshed with the threaded sleeve 216 and the driving motor 301 is installed in the slide rail 214 through the slider 215, and the connecting bracket 303 and the upper limiting plate 304 can be driven to rise and fall. The upper limiting plate 304 further presses the sling on the sling wheel 213 to improve the stability of the sling. At the same time, the second electric push rod 306 is started to drive the two side limiting wheels 311 to move towards both sides of the sling, so as to limit both ends of the sling and prevent violent shaking during the swaying process.

[0023] Embodiment 2: AsFigures 8 - 12 As shown, the eccentric steel beam continuous swinging device and construction method in the bank slope area of the suspension bridge. The specific construction method includes the following steps: S1. First, use sling connection ear plates and pins to connect two slings with appropriate lengths. The cable-supported crane cooperates with the extended sling to carry out the swinging hoisting of the steel beam in the bank slope area. S2. Then, slowly lower the steel strand of the cable-supported crane and move the cable-supported crane. It cooperates with the extended sling to bear the force and carry out the swinging of the steel beam. S3. Immediately after waiting for the swinging and lifting to the design position of the side span, use the winch set on the approach bridge to horizontally tow the steel beam to the steel beam bracket and anchor it in place.

[0024] Specifically, since the bridge is located in the backwater area of the reservoir area and is a U-shaped river valley, the Yangtze River water level cannot meet the vertical lifting requirements of the steel beam on the tower side of the side span. Therefore, it is selected to use the cable-supported crane to cooperate with the extended sling to carry out the swinging hoisting of the steel beam on the tower side of the side span.

[0025] Use sling connection ear plates and pins to connect two slings with appropriate lengths; transport the steel beam by barge to the water area where the beam section can be vertically lifted. Use the wire rope lowered by the tower top gantry winch to connect with the extended sling, and tow the sling above this water area to make the lower sling as perpendicular to the beam section as possible for the temporary connection between the sling and the beam section; the cable-supported crane lowers the spreader above this water area and connects it with the temporary lifting ear of the steel beam; release the towing wire rope of the extended sling, and the cable-supported crane slowly lowers the steel strand to make the extended sling slowly bear the force; after the extended sling is fully stressed, without releasing the spreader of the cable-supported crane, the cable-supported crane continues to lower the steel strand and move to the cable clamp at the design position of the side span swinging beam section; after the cable-supported crane arrives, slowly retract the steel strand to convert the stress state from the extended sling to the steel strand of the cable-supported crane; after the steel strand of the cable-supported crane is fully stressed, slowly lift the beam section to the design position; When the end beam swings to the design position, slowly lift the steel beam above the bracket, use the winch set on the approach bridge to tow the end beam, connect the towing wire rope with the spreader, and slowly tow the end beam to the bracket for temporary fixation.

[0026] Before the end beam is lowered, set the falling support on the bracket; after the end beam is obliquely pulled above the bracket, the cable-supported crane slowly lowers, and the approach bridge winch cooperates with the pulley block to adjust the position of the end beam, and slowly lower the end beam to the falling support on the bracket, and use the anchor point on the approach bridge for temporary locking.

[0027] The working principle of the present invention is as follows: First, use sling connection lugs and pins to connect two slings of appropriate lengths. The cable-suspended crane cooperates with the swinging and lengthening of the sling to hoist the steel beam in the bank slope area by swinging. Then, slowly lower the steel strand of the cable-suspended crane and move the cable-suspended crane, and cooperate with the lengthened sling to bear the force for the swinging of the steel beam. Immediately after waiting for the swinging and lifting to the designed position of the side span, use the winch installed on the approach bridge to horizontally tow the steel beam to the steel beam bracket for anchoring and positioning. The sling can also be sleeved on the sling wheel 213, and the sling wheel 213 is closely attached to the curved surface of the sling to increase the traction force of the sling. Subsequently, start the first electric push rod 205. The first electric push rod 205 drives the U-shaped bracket 206 and the toothed plate 207 to lift and lower, which can drive the movable sheet metal 211 and the sleeve 209 to rotate around the central axis 210, so that one end of the sleeve shaft 212 on the movable sheet metal 211 is inserted into the limit ring 203, facilitating the installation of the sling. Then, start the drive motor 301 to drive the drive screw rod 302 to rotate. The drive screw rod 302 meshes with the threaded sleeve 216 and the drive motor 301 is installed in the slide rail 214 through the slider 215, which can drive the connection bracket 303 and the upper limit plate 304 to lift and lower. The upper limit plate 304 then presses the sling on the sling wheel 213 to improve the stability of the sling. At the same time, start the second electric push rod 306 to drive the two side limit wheels 311 to move towards both sides of the sling, thereby limiting the two ends of the sling to prevent violent shaking during the swinging process.

[0028] The above is only the preferred embodiment of the present invention, and it is not a limitation of the present invention in other forms. Any person skilled in the art may use the disclosed technical content to make changes or modifications into equivalent embodiments with equivalent changes and apply them to other fields. However, as long as it does not depart from the technical solution content of the present invention, any simple modification, equivalent change, and modification made to the above embodiments based on the technical essence of the present invention still fall within the protection scope of the technical solution of the present invention.

Claims

1. Eccentric steel beam continuous swinging device in the bank slope area of a suspension bridge, including a connecting steel plate (100), characterized in that: The upper and lower ends of the shown connecting steel plate (100) are installed with ear plate mechanisms (200), and a limiting mechanism (300) is installed on each shown ear plate mechanism (200). During the process of limiting the suspension cable, the limiting mechanism (300) can also support the suspension cable to prevent the suspension cable from shaking. Each of the ear plate mechanisms (200) includes a fixed sheet metal (201). On both sides of the upper end of the fixed sheet metal (201), bolt mounting plates (202) are fixedly connected. An installation groove (204) is opened in the middle of the fixed sheet metal (201). A limiting ring (203) is fixedly connected to the inner wall of the fixed sheet metal (201). A central shaft (210) is rotatably installed in the installation groove (204). A sleeve (209) is fixedly connected to the central shaft (210). One side of the sleeve (209) is fixedly connected to a movable sheet metal (211), and the movable sheet metal (211) is located in the installation groove (204).

2. The eccentric steel beam continuous swinging device in the bank slope area of the suspension bridge according to claim 1, wherein: One side of the lower end of the movable sheet metal (211) is fixedly connected with a sleeve shaft (212), and a suspension cable wheel (213) is fixedly connected to the sleeve shaft (212). One side of the upper surface of the movable sheet metal (211) is fixedly connected with a slide rail (214).

3. The eccentric steel beam continuous swinging device in the bank slope area of the suspension bridge according to claim 2, wherein: A slider (215) is slidably installed in the slide rail (214). A threaded sleeve (216) is opened on one side of the top of the movable sheet metal (211) close to the slide rail (214).

4. The eccentric steel beam continuous swinging device in the bank slope area of the suspension bridge according to claim 3, characterized in that: Tooth grooves (208) are opened at both ends of the sleeve (209), and a tooth plate (207) is meshed and connected to one side of the tooth grooves (208). A U-shaped bracket (206) is fixedly connected to one side of the tooth plate (207).

5. The eccentric steel beam continuous swinging device in the bank slope area of the suspension bridge according to claim 4, characterized in that: A first electric push rod (205) is fixedly connected to the lower end of the U-shaped bracket (206), and the first electric push rod (205) is fixedly connected to the outer side wall of the fixed sheet metal (201).

6. The eccentric steel beam continuous swinging device in the bank slope area of the suspension bridge according to claim 1, characterized in that: The limiting mechanism (300) includes a driving motor (301). The driving motor (301) is fixedly connected to one side of the slider (215). The output shaft of the driving motor (301) is fixedly connected with a driving lead screw (302). The driving lead screw (302) is meshed and connected to the threaded sleeve (216). The lower end of the driving lead screw (302) is rotatably installed with a connecting bracket (303).

7. The eccentric steel beam continuous swinging device in the bank slope area of the suspension bridge according to claim 6, characterized in that: The connecting bracket (303) is located above the suspension cable wheel (213). Side rotating seats (305) are fixedly connected to both ends of the connecting bracket (303). A lower connecting rod (310) is rotatably installed in each side rotating seat (305). A side limiting wheel (311) is rotatably installed at the lower end of each lower connecting rod (310), and the side limiting wheels (311) are located on both sides of the suspension cable wheel (213).

8. The eccentric steel beam continuous swinging device in the bank slope area of the suspension bridge according to claim 7, characterized in that: One end of each of the lower connecting rods (310) is fixedly connected to an upper connecting rod (309). Each of the upper connecting rods (309) and the lower connecting rods (310) are arranged in an L shape. A connecting member (308) is rotatably installed at the upper end of each of the upper connecting rods (309). A connecting block (307) is rotatably installed between each of the connecting members (308). A second electric push rod (306) is fixedly connected to the lower surface of the connecting block (307). The second electric push rod (306) is fixedly connected to the upper surface of the upper limit plate (304).

9. The eccentric steel beam continuous swinging device and construction method in the bank slope area of a suspension bridge, characterized in that, It is carried out by using the eccentric steel beam continuous swinging device in the bank slope area of the suspension bridge described in claim 8. The specific construction method includes the following steps: S1. First, use sling connection ear plates and pins to connect two slings with appropriate lengths. The cable-supported crane cooperates with the swinging and lengthening of the sling to hoist and swing the steel beam in the bank slope area. S2. Then, slowly lower the steel strand of the cable-supported crane and move the cable-supported crane, and cooperate with the lengthened sling to bear the force to swing the steel beam. S3. Immediately after swinging and lifting to the design position of the side span, use the winch installed on the approach bridge to horizontally tow the steel beam to be anchored and positioned on the steel beam bracket.

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