Suspension bridge catwalk pressing device

Abstract

The utility model discloses a suspension bridge catwalk pressing device which comprises an upper counter-force seat, a jack, lower counter-force seats, a distribution beam, a connecting device, a conversion seat and a pre-buried hinged support. The lower counter-force seats perpendicular to the distribution beam are arranged at the left end and the right end of the upper face of the distribution beam respectively. An upper counter-force seat parallel to the lower counter-force seat is arranged above each lower counter-force seat, and a jack for providing downward pressure is arranged in the middle between the lower counter-force seat and the upper counter-force seat; the lower surfaces of the two conversion seats are respectively hinged with the corresponding embedded hinged supports through pin shafts; and the lower conversion seat and the lower counter-force seat are connected together by the connecting device. The suspension bridge catwalk downward pressing device can be suitable for linear adjustment of the catwalk near the main tower, linear downward pressing of the catwalk near the main tower is achieved by arranging the suspension bridge catwalk downward pressing device, the problems that the catwalk near the main tower is affected by a cable saddle and the construction space of the top of the main tower, and the distance between the catwalk and a main cable is small are solved, and the construction efficiency of a suspension bridge main cable system is improved.

Description

Technical Field

[0001] The utility model relates to the field of suspension bridge catwalk construction, in particular to a suspension bridge catwalk pressing device. Background Art

[0002] Catwalks are widely used in the construction of various suspension bridges. As the main channel and platform for the construction of the main cable of the suspension bridge, the distance between the catwalk and the main cable directly determines the construction efficiency of the main cable. Generally, catwalks are located near the main tower and are often affected by the construction space of the cable saddle and the top of the main tower. If the distance between the catwalk and the main cable is small, it will cause great difficulties for the construction. In the case of insufficient distance between the catwalk and the main cable, the conventional method, that is, adjusting the cable force of the catwalk load-bearing cable to achieve the linear adjustment of the section near the main tower, is difficult to achieve the expected effect.

[0003] In view of this, it is urgent to improve the construction technology of the existing suspension bridge catwalk to facilitate on-site construction and ensure that the catwalk line is consistent with the main cable. Summary of the invention

[0004] The utility model aims to provide a suspension bridge catwalk pressing down device which can press down the suspension bridge catwalk near the main tower, is easy to operate and has strong practicality.

[0005] The purpose of the utility model is achieved in this way:

[0006] A downward pressure device for a catwalk of a suspension bridge is characterized in that it includes, from bottom to top, an upper reaction seat, a jack, a lower reaction seat, a distribution beam, a connecting device, a conversion seat, and an embedded hinge seat. A lower reaction seat is respectively provided at the left and right ends above the distribution beam and is placed perpendicular to the distribution beam. An upper reaction seat is provided above each lower reaction seat and is placed parallel to the lower reaction seat. A jack for providing downward pressure is provided in the middle between the lower reaction seat and the upper reaction seat. Two embedded hinge seats are placed side by side on the main tower. The bottoms of the two conversion seats are respectively hinged to the corresponding embedded hinge seats through pins. A connecting device is provided between the conversion seat and the lower reaction seat, and the connecting device connects the conversion seat below with the lower reaction seat.

[0007] During the downward pressing process, the connecting device is a fine-rolled threaded steel bar and a nut, and the lower reaction seat and the upper reaction seat are connected to the conversion seat through the fine-rolled threaded steel bar and the nut; wherein: the lower ends of the two fine-rolled threaded steel bars pass through the through holes at the left and right ends of the conversion seat from top to bottom respectively, and are fixed together with the nuts on the bottom of the left and right ends of the conversion seat; the upper ends of the two fine-rolled threaded steel bars pass through the through holes at the left and right ends of the lower reaction seat and the through holes at the left and right ends of the upper reaction seat respectively from bottom to top in sequence, and are fixed together with the nuts on the top of the left and right ends of the lower reaction seat and the top of the left and right ends of the upper reaction seat, and the distribution beam is clamped between the two fine-rolled threaded steel bars.

[0008] After the downward pressing is completed, the connecting device is a connecting plate and a pin shaft, and the connecting plate and the pin shaft are used to lock the downward pressing device; among them: the lower end of the connecting plate is connected to the lower lifting lug assembly in the middle of the upper surface of the conversion seat through the pin shaft, and the upper end of the connecting plate is connected to the upper lifting lug assembly on one side of the lower surface of the distribution beam through the pin shaft.

[0009] The completely identical upper reaction seat and lower reaction seat are both composed of A-shaped steel channels, A-shaped stiffening plates, and steel backing plates. Two A-shaped steel channels are placed back to back at intervals, and several A-shaped stiffening plates are evenly arranged at intervals in the open slots of each A-shaped steel channel. Four steel backing plates with through holes in the middle are respectively fixed on the upper and lower surfaces of the two back-to-back A-shaped steel channels, arranged in a rectangular shape, and the four steel backing plates connect the two A-shaped steel channels into one body.

[0010] The distribution beam is composed of B-shaped steel channels, B-shaped stiffening plates, connecting steel plates, upper lifting lug assemblies, and catwalk load-bearing cable limiters. Two B-shaped steel channels are placed back to back at intervals, and several B-shaped stiffening plates are evenly arranged at intervals in the open slots of each B-shaped steel channel. Several connecting steel plates are respectively fixed on the upper and lower surfaces of the two back-to-back B-shaped steel channels, and the several connecting steel plates connect the two B-shaped steel channels into one body; two upper lifting lug assemblies are respectively fixed on the left and right sides of the bottom ends of the two B-shaped steel channels. The upper lifting lug assembly is composed of two ear plates and four triangular stiffening plates. The two ear plates with pin holes are placed vertically side by side, and two triangular stiffening plates are arranged side by side at the connection between the outer surface of each ear plate and the bottom ends of the two B-shaped steel channels; a catwalk load-bearing cable limiter is provided on the outside of the lifting lug assembly on one side of the bottom ends of the two B-shaped steel channels. The two catwalk load-bearing cable limiters are both composed of limit side plates, arc plates, limiter reinforcing plates, and side stiffening plates. Several limit side plates are evenly spaced under and on both sides of the concave arc plate. The catwalk load-bearing cable is placed between adjacent two limit side plates. Several limiter reinforcing plates parallel to the limit side plates are evenly spaced on the upper surface of the arc plate. Two side stiffening plates are arranged side by side at the connection between the outer surfaces of the limit side plates on both sides of the arc plate and the bottom ends of the two B-shaped steel channels.

[0011] The conversion seat is composed of a conversion reaction seat, a lower lifting lug assembly, and a lower connecting plate. The conversion reaction seat has the same structure as the upper reaction seat and the lower reaction seat, and is composed of A-shaped steel channels, A-shaped stiffening plates, and steel backing plates; the lower lifting lug assembly has the same structure as the upper lifting lug assembly and is composed of two ear plates and four triangular stiffening plates; the bottom of the lower lifting lug assembly is fixed in the middle of the two steel backing plates on the upper surface of the conversion reaction seat, and the top of the lower connecting plate with a pin hole is fixed in the middle of the two steel backing plates under the conversion reaction seat.

[0012] The embedded hinge seat is composed of a hinge seat ear plate, a hinge seat stiffening plate, and a hinge seat base. The hinge seat ear plate with a pin hole is fixed in the "C"-shaped hinge seat base, and two hinge seat stiffening plates are provided at the connection between the hinge seat stiffening plate and the hinge seat base.

[0013] A-type channel steel is made by cutting double-groove 20b steel, with a cutting length of 660mm and a net spacing of 50mm between two A-type channel steels; A-type stiffening plate is made by cutting 10mm thick steel plate; steel pad is made by cutting 20mm thick steel plate, with a length and width of 120mm, and the welding position of the upper and lower steel pads is 230mm from the center.

[0014] B-type channel steel is cut and manufactured from double-groove 40a steel, and the cutting length is 1200mm larger than the distance between the outermost catwalk load-bearing cables, and the net spacing between two B-type channel steels is 60mm; B-type stiffening plates are cut and manufactured from 10mm thick steel plates, and the spacing above the catwalk load-bearing cables is 100mm, and the remaining positions are 200mm; connecting steel plates are cut and manufactured from 10mm thick steel plates, with a length and width of 220mm, and the upper and lower surfaces are evenly welded at a spacing of 500mm; ear plates and triangular stiffening plates are cut and manufactured from 20mm thick steel plates; limit side plates, arc plates, limit reinforcement plates, and side stiffening plates are cut and manufactured from 10mm thick steel plates, and the spacing between two adjacent limit side plates is 20mm larger than the diameter of the catwalk load-bearing cables, the upper side of the arc plate is arc-shaped and the lower side is horizontal, and the lower side of the reinforcement plate is arc-shaped and the upper side is horizontal.

[0015] The lower connecting plate is made of 50mm thick steel plate; the hinge seat ear plate, hinge seat stiffening plate and hinge seat base are all made of 20mm thick steel plate; the connecting plate is made of 50mm thick steel plate and has a width of 280mm.

[0016] Compared with the prior art, the advantages of the utility model are as follows:

[0017] (1) The utility model can be applied to the adjustment of the catwalk line shape near the main tower. By setting the catwalk pressing device of the suspension bridge, the catwalk line shape near the main tower is pressed downward, which solves the problem that the catwalk near the main tower is affected by the construction space of the cable saddle and the top of the main tower, and the distance between the catwalk and the main cable is small, thereby improving the construction efficiency of the main cable system of the suspension bridge;

[0018] (2) It has a simple structure, convenient operation, and low cost. It can realize the linear downward pressure of the catwalk near the main tower, and has strong practicality and wide applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the catwalk's downward pressure process;

[0020] Figure 2 It is a schematic diagram of the working state of the catwalk pressing device;

[0021] Figure 3 Schematic diagram of the upper reaction seat and the lower reaction seat;

[0022] Figure 4 is a schematic diagram of the distribution beam;

[0023] Figure 5 is a schematic diagram of the lifting lug assembly;

[0024] Figure 6 It is a schematic diagram of the limiter of the load-bearing cable of the catwalk;

[0025] Figure 7 It is a schematic diagram of the conversion seat;

[0026] Figure 8 It is a schematic diagram of the embedded hinge seat;

[0027] Fig. 9 is a schematic diagram of the connection plate;

[0028] Figure markings: 1-main tower, 2-upper reaction seat, 3-jack, 4-lower reaction seat, 5-fine-rolled threaded steel, 6-distribution beam, 7-connecting plate, 8-conversion seat, 9-embedded hinge seat, 10-catwalk load-bearing cable, 11-A-type channel steel, 12-A-type stiffening plate, 13-steel pad, 14-B-type channel steel, 15-B-type stiffening plate, 16-connecting steel plate, 17-upper lifting ear assembly, 18-catwalk load-bearing cable limiter, 19-triangular stiffening plate, 20-ear plate, 21-limiting side plate, 22-arc plate, 23-limiting member reinforcement plate, 24-lower connecting plate, 25-hinge seat ear plate, 26-hinge seat stiffening plate, 27-hinge seat base, 28-side stiffening plate, 29-lower lifting ear assembly, 30-conversion reaction seat. DETAILED DESCRIPTION

[0029] The specific implementation of the utility model is further described below in conjunction with specific examples and drawings of the specification.

[0030] See also Figures 1 to 9 As shown, a downward pressure device for a catwalk of a suspension bridge comprises, from bottom to top: an upper reaction seat 2, a jack 3, a lower reaction seat 4, a distribution beam 6, a connecting device, a conversion seat 8, and an embedded hinge seat 9. The main body of the downward pressure device is a distribution beam 6, and a lower reaction seat 4 placed vertically to the distribution beam 6 is provided at the left and right ends of the distribution beam 6, an upper reaction seat 2 placed parallel to the lower reaction seat 4 is provided above each lower reaction seat 4, and a jack 3 for providing downward pressure is provided in the middle between the lower reaction seat 4 and the upper reaction seat 2; two embedded hinge seats 9 placed side by side are provided on the main tower 1; the bottoms of the two conversion seats 8 are respectively hinged to the corresponding embedded hinge seats 9 through pins; a connecting device is provided between the conversion seat 8 and the lower reaction seat 4, and the connecting device connects the conversion seat 8 below with the lower reaction seat 4.

[0031] During the pressing process, the connecting device is the fine-rolled threaded steel 5 and the nut, and the lower reaction seat 4 and the upper reaction seat 2 are connected to the conversion seat 8 through the fine-rolled threaded steel 5 and the nut; wherein: the lower ends of the two fine-rolled threaded steels 5 pass through the through holes at the left and right ends of the conversion seat 8 from top to bottom respectively, and then are fixed together with the nuts on the bottom of the left and right ends of the conversion seat 8; the upper ends of the two fine-rolled threaded steels 5 pass through the through holes at the left and right ends of the lower reaction seat 4 and the through holes at the left and right ends of the upper reaction seat 2 from bottom to top respectively, and then are fixed together with the nuts on the upper sides of the left and right ends of the lower reaction seat 4 and the upper sides of the left and right ends of the upper reaction seat 2, and the distribution beam 6 is clamped between the two fine-rolled threaded steels 5.

[0032] After the downward pressing is completed, the connecting device is a connecting plate 7 and a pin shaft, and the connecting plate 7 and the pin shaft are used to lock the downward pressing device; wherein: the lower end of the connecting plate 7 is connected to the lower lifting ear assembly 29 in the middle of the conversion seat 8 through the pin shaft, and the upper end of the connecting plate 7 is connected to the upper lifting ear assembly 17 on the lower side of the distribution beam 6 through the pin shaft.

[0033] The completely identical upper reaction seat 2 and lower reaction seat 4 are both composed of A-type channel steel 11, A-type stiffening plate 12, and steel pad 13. Two A-type channel steels 11 are placed back to back, and 8 A-type stiffening plates 12 are evenly spaced in the open groove of each A-type channel steel 11. Four steel pads 13 with through holes in the middle are respectively fixed on the upper and lower sides of the two back-to-back A-type channel steels 11, arranged in a rectangular shape. The four steel pads 13 connect the two A-type channel steels 11 into one.

[0034] The distribution beam 6 is composed of a channel steel 14 of type B, a stiffening plate 15 of type B, a connecting steel plate 16, an upper hanging ear assembly 17, and a catwalk load-bearing cable limiting member 18. Two channel steels 14 of type B are placed back-to-back at intervals. A number of stiffening plates 15 of type B are evenly arranged at intervals in the open slots of each channel steel 14 of type B. A number of connecting steel plates 16 are respectively fixed on the upper and lower surfaces of the two back-to-back channel steels 14 of type B. The number of connecting steel plates 16 connects the two channel steels 14 of type B into one body; two upper hanging ear assemblies 17 are respectively fixed on the left and right sides at the bottom ends of the two channel steels 14 of type B. The upper hanging ear assembly 17 is composed of two ear plates 20 and four triangular stiffening plates 19. The two ear plates 20 with pin holes are placed vertically side by side. Two triangular stiffening plates 19 placed side by side are provided at the connection between the outer surface of each ear plate 20 and the bottom ends of the two channel steels 14 of type B; a catwalk load-bearing cable limiting member 18 is provided outside the hanging ear assembly 17 on one side of the bottom ends of the two channel steels 14 of type B. The two catwalk load-bearing cable limiting members 18 are both composed of a limiting side plate 21, an arc plate 22, a limiting member strengthening plate 23, and a side stiffening plate 28. A number of limiting side plates 21 are evenly arranged at intervals under and on both sides of the concave arc plate 22. The catwalk load-bearing cable 10 is placed between adjacent two limiting side plates 21. A number of limiting member strengthening plates 23 parallel to the limiting side plates 21 are evenly arranged at intervals on the upper surface of the arc plate 22. Two side stiffening plates 28 placed side by side are provided at the connection between the outer surfaces of the limiting side plates 21 on both sides of the arc plate 22 and the bottom ends of the two channel steels 14 of type B.

[0035] The conversion seat 8 is composed of a conversion reaction seat 30, a lower hanging ear assembly 29, and a lower connecting plate 24. The conversion reaction seat 30 has the same structure as the upper reaction seat 2 and the lower reaction seat 4, and is composed of a channel steel 11 of type A, a stiffening plate 12 of type A, and a steel backing plate 13; the lower hanging ear assembly 29 has the same structure as the upper hanging ear assembly 17, and is composed of two ear plates 20 and four triangular stiffening plates 19; the bottom of the lower hanging ear assembly 29 is fixed in the middle of the two steel backing plates 13 on the upper surface of the conversion reaction seat 30, and the top of the lower connecting plate 24 with a pin hole is fixed in the middle of the two steel backing plates 13 under the conversion reaction seat 30.

[0036] The embedded hinge seat 9 is composed of a hinge seat ear plate 25, a hinge seat stiffening plate 26, and a hinge seat base 27. A hinge seat ear plate 25 with a pin hole is fixed in the "C"-shaped hinge seat base 27. Two hinge seat stiffening plates 26 are provided at the connection between the hinge seat stiffening plate 26 and the hinge seat base 27.

[0037] The channel steel 11 of type A is fabricated by cutting a double-splice channel 20b steel, with a cutting length of 660 mm and a net spacing of 50 mm between the two channel steels 11 of type A; the stiffening plate 12 of type A is fabricated by cutting a steel plate with a thickness of 10 mm, and 8 pieces are made; the steel backing plate 13 is fabricated by cutting a steel plate with a thickness of 20 mm, with a length and width of 120 mm each. The welding positions of the upper and lower steel backing plates 13 are 230 mm from the center.

[0038] The B-type channel steel 14 is cut and manufactured by cutting double-groove 40a steel, and the cutting length is 1200mm greater than the distance between the outermost catwalk load-bearing cables 10, and the net spacing between the two B-type channel steels 14 is 60mm; the B-type stiffening plate 15 is cut and manufactured by cutting a 10mm thick steel plate, and the spacing above the catwalk load-bearing cables 10 is 100mm, and the spacing at other positions is 200mm; the connecting steel plate 16 is cut and manufactured by cutting a 10mm thick steel plate, and the length and width are both 220mm, and the upper and lower two The surfaces are evenly welded at a spacing of 500mm; the ear plates 20 and triangular stiffening plates 21 are all cut and made of 20mm thick steel plates; the limiting side plates 21, the arc plates 22, the limiting member reinforcement plates 23, and the side stiffening plates 28 are all cut and made of 10mm thick steel plates, and the spacing between two adjacent limiting side plates 21 is 20mm larger than the diameter of the catwalk load-bearing cable 10, the upper side of the arc plate 22 is arc-shaped and the lower side is horizontal, and the lower side of the reinforcement plate 23 is arc-shaped and the upper side is horizontal.

[0039] The lower connecting plate 24 is made of a 50 mm thick steel plate; the hinge seat ear plate 25, the hinge seat stiffening plate 26, and the hinge seat base 27 are all made of a 20 mm thick steel plate; the connecting plate 7 is made of a 50 mm thick steel plate and has a width of 280 mm.

[0040] The construction device described in the utility model is used based on the downward pressure construction of the catwalk near the main tower. Obviously, the construction device can also be used in its bridge construction, so other constructions based on the concept of the construction device are also considered to be within the protection scope of the utility model.

Claims

1. A suspension bridge catwalk pressing device, characterized in that: From bottom to top, this includes: An upper reaction seat, a jack, a lower reaction seat, a distribution beam, a connecting device, a conversion seat, and an embedded hinge seat. A lower reaction seat is provided at the left and right ends of the distribution beam and is placed perpendicular to the distribution beam. An upper reaction seat is provided above each lower reaction seat and is placed parallel to the lower reaction seat. A jack for providing downward pressure is provided in the middle between the lower reaction seat and the upper reaction seat. Two embedded hinge seats are placed side by side on the main tower. The bottoms of the two conversion seats are hinged to the corresponding embedded hinge seats through pins respectively. A connecting device is provided between the conversion seat and the lower reaction seat, and the connecting device connects the conversion seat below with the lower reaction seat.

2. The suspension bridge catwalk pressing device according to claim 1, characterized in that: During the downward pressing process, the connecting device is a fine-rolled threaded steel bar and a nut, and the lower reaction seat and the upper reaction seat are connected to the conversion seat through the fine-rolled threaded steel bar and the nut; wherein: the lower ends of the two fine-rolled threaded steel bars pass through the through holes at the left and right ends of the conversion seat from top to bottom respectively, and are fixed together with the nuts on the bottom of the left and right ends of the conversion seat; the upper ends of the two fine-rolled threaded steel bars pass through the through holes at the left and right ends of the lower reaction seat and the through holes at the left and right ends of the upper reaction seat respectively from bottom to top in sequence, and are fixed together with the nuts on the top of the left and right ends of the lower reaction seat and the top of the left and right ends of the upper reaction seat, and the distribution beam is clamped between the two fine-rolled threaded steel bars.

3. The suspension bridge catwalk pressing device according to claim 1, characterized in that: After the downward pressing is completed, the connecting device is a connecting plate and a pin shaft, and the connecting plate and the pin shaft are used to lock the downward pressing device; wherein: the lower end of the connecting plate is connected to the lower lifting ear assembly in the middle of the conversion seat through the pin shaft, and the upper end of the connecting plate is connected to the upper lifting ear assembly on the lower side of the distribution beam through the pin shaft.

4. The suspension bridge catwalk pressing device according to claim 1, characterized in that: Completely identical upper reaction seats and lower reaction seats are composed of A-type channel steels, A-type stiffening plates, and steel pads. Two A-type channel steels are placed back to back, and A-type stiffening plates are evenly spaced in the open groove of each A-type channel steel. Four steel pads with through holes in the middle are respectively fixed on the top and bottom of the two back-to-back A-type channel steels, arranged in a rectangular shape. The four steel pads connect the two A-type channel steels into one.

5. The suspension bridge catwalk pressing device according to claim 1, characterized in that: The distribution beam consists of channel steel of type B, stiffening plates of type B, connecting steel plates, upper hanging ear assemblies, and catwalk load-bearing cable limiters. Two channel steels of type B are placed back to back at intervals. A number of stiffening plates of type B are evenly arranged at intervals in the open slots of each channel steel of type B. A number of connecting steel plates are respectively fixed on the upper and lower sides of the two channel steels of type B placed back to back. The number of connecting steel plates connects the two channel steels of type B into one body; two upper hanging ear assemblies are respectively fixed on the left and right sides of the bottom ends of the two channel steels of type B. The upper hanging ear assembly consists of two ear plates and four triangular stiffening plates. The two ear plates with pin holes are placed vertically side by side. Two triangular stiffening plates placed side by side are provided at the connection between the outer surface of each ear plate and the bottom ends of the two channel steels of type B; a catwalk load-bearing cable limiter is provided outside the hanging ear assembly on one side of the bottom ends of the two channel steels of type B. The two catwalk load-bearing cable limiters both consist of a limit side plate, an arc plate, a limiter reinforcing plate, and a side stiffening plate. A number of limit side plates are evenly arranged at intervals under and on both sides of the concave arc plate. The catwalk load-bearing cable is placed between adjacent two limit side plates. A number of limiter reinforcing plates parallel to the limit side plates are evenly arranged at intervals on the upper surface of the arc plate. Two side stiffening plates placed side by side are provided at the connection between the outer surfaces of the limit side plates on both sides of the arc plate and the bottom ends of the two channel steels of type B.

6. The suspension bridge catwalk pressing device according to claim 1, characterized in that: The conversion seat consists of a conversion reaction seat, a lower hanging ear assembly, and a lower connecting plate. The conversion reaction seat has the same structure as the upper reaction seat and the lower reaction seat, and consists of channel steel of type A, stiffening plates of type A, and steel backing plates; the lower hanging ear assembly has the same structure as the upper hanging ear assembly and consists of two ear plates and four triangular stiffening plates; the bottom of the lower hanging ear assembly is fixed in the middle of the two steel backing plates on the upper surface of the conversion reaction seat, and the top of the lower connecting plate with a pin hole is fixed in the middle of the two steel backing plates under the conversion reaction seat.

7. The suspension bridge catwalk pressing device according to claim 1, characterized in that: The embedded hinge seat consists of a hinge seat ear plate, a hinge seat stiffening plate, and a hinge seat base. A hinge seat ear plate with a pin hole is fixed in the "C"-shaped hinge seat base. Two hinge seat stiffening plates are provided at the connection between the hinge seat stiffening plate and the hinge seat base.

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