Temporary hanging system for replacing suspender of railway-crossing tied-arch bridge

Abstract

The utility model belongs to the technical field of bridge maintenance, and particularly relates to a temporary hanging system for replacing a hanging rod of a railway-crossing tied-arch bridge, which adopts a lower hanging steel plate collet which comprises a bottom plate, side plates connected to two sides of the bottom plate, and a fixed plate vertically connected to the top of each side plate, the fixing plate is used for fixing the temporary suspender and the temporary steel cross beam, the bottom plate is used for being attached to the bottom face of the under-bridge cross beam, and the side plate is used for being attached to the side face of the under-bridge cross beam. The thickness of the steel plate is smaller, the difference between the height of the steel plate and the shoulder pole beam and the length of the shoulder pole beam extending out of the two sides of the bridge lower cross beam is large, and the contact area of the lower hanging steel plate bottom support and the bridge lower cross beam is larger than that of the shoulder pole beam in the prior art. Therefore, the method can be suitable for replacing the suspender of the railway-crossing tied-arch bridge with low clearance height under the bridge and close transverse and vertical distances between a catenary carrier cable and a return line and an under-bridge cross beam.

Description

Technical Field

[0001] The utility model belongs to the technical field of bridge maintenance, and particularly relates to a temporary sling system for replacing the suspender of a tied-arch bridge across a railway. Background Art

[0002] The tied-arch bridge is a typical bridge type in arch bridges. It has the advantages of external static indeterminacy, internal hyperstatic indeterminacy, no horizontal thrust at the arch feet under the action of lateral forces, low heights of the approach bridges at both ends, and low requirements for geological conditions, so it is widely used. The suspender is one of the main load-bearing members of the tied-arch bridge. The lower end is connected to the cross beam, and the upper end is connected to the arch rib, playing an important role in transmitting the deck load to the arch rib. During long-term use, various diseases will occur to the suspenders, such as cracking and falling off of the protective concrete at the upper and lower anchor heads; loosening, failure, and wire slipping of the anchorage; uneven stress of the steel strands or steel wires of the suspenders, etc. The existence of these diseases in the tied-arch bridge poses serious potential safety hazards to the bridge. Therefore, the suspenders need to be replaced after long-term use.

[0003] Tied-arch bridges are applied in many occasions, such as urban traffic arteries, highways, railways, rivers, etc. In the prior art, a relatively common method for replacing the suspenders of a tied-arch bridge is the device for replacing the suspenders of a tied-arch bridge disclosed in the Chinese invention patent with the authorization announcement number of CN102286942B. It uses components such as threaded rods, Bailey truss beams, shoulder beams, distribution beams, through-type hydraulic jacks, through-type sensors, etc. Among them, the shoulder beam is arranged under the cross beam of the lower part of the suspender to be replaced, and the Bailey truss beam is located above the cushion beam arranged on the bridge and is erected between adjacent suspenders. Since the shoulder beam mostly uses I-beams in actual use, the height of the I-beam is relatively high. The tied-arch bridge whose suspenders need to be replaced in this application is located above multiple railway main lines. The horizontal and vertical distances between the multiple-strand catenary messenger wires and the return wires inside the railway fence and the cross beam under the bridge are relatively close. The construction under the bridge needs to be carried out during the skylight point, with great construction difficulty and high safety risks. The construction under the bridge inside the railway fence also requires the cooperation of catenary power outage. Using the devices and methods in the prior art is more likely to collide with the catenary messenger wires and return wires of the railway, with relatively high safety risks and affecting railway transportation. Content of the Utility Model

[0004] The utility model provides a temporary sling system for replacing the suspenders of a tied-arch bridge across a railway to solve the technical problem that the existing suspender replacement devices and structures are difficult to apply to the replacement of the suspenders on the tied-arch bridge across a railway.

[0005] To solve the above problems, the temporary sling system for replacing the suspenders of a tied-arch bridge across a railway provided by the utility model adopts the following technical solutions:

[0006] Temporary sling system for replacing the suspenders of a tied-arch bridge across a railway, characterized in that it includes a first temporary suspender, a second temporary suspender, a support assembly, a first temporary steel cross beam, a second temporary steel cross beam, a temporary anchor and a bottom support plate for the lower sling; there are four groups of the support assemblies, which are arranged at intervals along the upper chord steel pipe of the tied-arch bridge, and each support assembly includes a tightening member for tightening on the upper chord steel pipe and a leveling cushion block connected to the tightening member;

[0007] Two first temporary steel cross beams are arranged in parallel at intervals and are located on both sides of the suspender to be replaced, and each first temporary steel cross beam is installed on the upper surfaces of the corresponding two leveling cushion blocks; the second temporary steel cross beam is arranged corresponding to the first temporary steel cross beam up and down and has the same extending direction, and the second temporary steel cross beam is used to be arranged between the bridge deck and the lower chord steel pipe of the tied-arch bridge; two of the first temporary suspenders are connected between each first temporary steel cross beam and the corresponding second temporary steel cross beam, and the top ends of the first temporary suspenders are all connected with the temporary anchors for tensioning the first temporary suspenders;

[0008] There are two bottom support plates for the lower sling arranged along the extending direction of the second temporary steel cross beam, and each bottom support plate for the lower sling includes a bottom plate, side plates connected to both sides of the bottom plate, and fixing plates vertically connected to the tops of each side plate. The fixing plates are located below the corresponding second temporary steel cross beam. The bottom plate is used to fit with the bottom surface of the bridge cross beam under the bridge, and the side plates are used to fit with the side surfaces of the bridge cross beam under the bridge; two second temporary suspenders passing through the bridge deck are correspondingly and firmly connected between each second temporary steel cross beam and the two fixing plates located below it, so that the second temporary suspenders are distributed in a rectangle with the suspender to be replaced as the center.

[0009] Furthermore, a plurality of reinforcing rib plates are connected between the fixing plate and the corresponding side plate and are arranged at intervals in the extending direction of the bridge cross beam under the bridge.

[0010] Furthermore, the fixing plate is in contact with the lower surface of the bridge deck.

[0011] Furthermore, an anti-electric insulation rubber layer is provided on the outer surface of the bottom support plate for the lower sling.

[0012] Furthermore, the tightening member includes two semi-circular hoop bodies, and radial two sides of each semi-circular hoop body are both connected with fastening plates extending along the axis direction of the semi-circular hoop body. A plurality of reinforcing ribs are connected between the fastening plates and the semi-circular hoop body and are arranged at intervals along the axis direction of the semi-circular hoop body. A plurality of fastening holes are provided on the fastening plates and are arranged at intervals along the axis direction of the semi-circular hoop body.

[0013] Furthermore, the second temporary suspender is a rolled thread steel bar.

[0014] Furthermore, the first temporary steel cross beam includes two first channel steels arranged back to back and parallel to each other with a certain interval, and first connecting plates connected to the tops and bottoms of the two first channel steels. A plurality of reinforcing plates are welded inside the first channel steels and arranged at intervals along the length direction of the first channel steels; first through holes are respectively provided on the two first connecting plates at both ends, and the first through holes correspond to the gaps between the first temporary suspension rods and the two first channel steels up and down.

[0015] Furthermore, the second temporary steel cross beam includes two second channel steels arranged back to back and parallel to each other with a certain interval, and second connecting plates connected to the tops and bottoms of the two second channel steels; second through holes corresponding to the first through holes one by one are provided on the two second connecting plates at both ends, and third through holes corresponding to the second temporary suspension rods one by one are provided between two of the second connecting plates located between both ends.

[0016] The beneficial effect of the temporary sling suspension system for replacing the suspender of the tied-arch bridge across the railway of the present utility model is as follows: When fixing the second temporary steel cross beam, the present utility model adopts a lower sling steel plate bottom support. The lower sling steel plate bottom support includes a bottom plate that fits the bottom surface of the bridge cross beam below, a side plate that fits the side surface of the bridge cross beam below, and a fixing plate for installing the second temporary suspension rod. Compared with the cross beam in the prior art, the thicknesses of the bottom plate and the side plate are thinner, and there is a large difference from the height of the cross beam and the lengths of the cross beam extending out of both sides of the bridge cross beam below; in addition, the contact area between the lower sling steel plate bottom support and the bridge cross beam below is also larger than that of the cross beam in the prior art. Therefore, it can be adapted to the replacement of the suspenders of the tied-arch bridge across the railway with a low clearance height below the bridge, a short horizontal and vertical distance between the catenary messenger wire and the return wire and the bridge cross beam below. During the construction at the scheduled skylight point of the railway, the normal operation of the railway can be maintained, and the safety is higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] By referring to the drawings and reading the detailed description below, the above and other objects, features and advantages of the exemplary embodiments of the present utility model will become easy to understand. In the drawings, several embodiments of the present utility model are shown in an exemplary rather than restrictive manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein:

[0018] Figure 1 is the front view of the temporary sling suspension system for replacing the suspender of the tied-arch bridge across the railway of the present utility model;

[0019] Figure 2 is the schematic plan view of the bottom of the bridge cross beam below;

[0020] Figure 3 is Figure 2 the A-A sectional view of

[0021] Figure 4 is Figure 1 the enlarged schematic view at A in

[0022] Figure 5 is Figure 2 an enlarged schematic view of position B in

[0023] Figure 6 is the front view of the first temporary cross beam;

[0024] Figure 7 is the top view of the first temporary cross beam;

[0025] Figure 8 is Figure 6 the A-A sectional view of

[0026] Figure 9 is the top view of the second temporary cross beam;

[0027] Figure 10 is the structural schematic diagram of the tightening member.

[0028] Explanation of reference numerals:

[0029] 1. upper chord steel pipe; 2. lower chord steel pipe; 3. first temporary steel cross beam; 31. first channel steel; 32. first connecting plate; 33. first perforation; 34. reinforcement plate; 4. second temporary steel cross beam; 41. second channel steel; 42. second connecting plate; 43. second perforation; 44. third perforation; 5. first temporary suspension rod; 6. second temporary suspension rod; 7. temporary anchor; 8. tightening member; 81. semi-circular hoop body; 82. fastening plate; 83. reinforcement rib; 9. leveling cushion block; 10. bottom support of the lower sling steel plate; 101. bottom plate; 102. side plate; 103. fixing plate; 104. stiffening rib plate; 105. fifth perforation; 11. old suspension rod; 12. bridge deck; 121. fourth perforation; 13. under-bridge cross beam. Detailed implementation manners

[0030] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Those skilled in the art should know that the embodiments described below are part of the embodiments of the present disclosure, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts fall within the protection scope of the present invention.

[0031] Next, with reference to several representative embodiments of the present invention, the principles and spirits of the present invention will be elaborated in detail.

[0032] An embodiment of the temporary sling system for replacing the suspension rods of the through-railway tied-arch bridge provided by the present invention:

[0033] As Figure 1 , Figure 2 and Figure 3As shown in the figure, the temporary sling system for replacing the suspenders of the through-arch tied-arch bridge includes a first temporary suspender 5, a second temporary suspender 6, a support assembly, a first temporary steel cross beam 3, a second temporary steel cross beam 4, a temporary anchor 7 and a bottom support plate 10 for the lower sling.

[0034] Specifically, there are four groups of support assemblies, with two groups provided on each upper chord steel pipe 1 of the tied-arch bridge. The four groups of support assemblies are arranged in a rectangular distribution, and the two groups of support assemblies on each upper chord steel pipe 1 are arranged at intervals. Each group of support assemblies includes a tightening member 8 for tightening on the upper chord steel pipe 1 and a leveling cushion block 9 connected to the tightening member 8; among them, the structure of the tightening member 8 is as Figure 10 shown. The tightening member 8 includes two semi-circular hoops 81. On both radial sides of each semi-circular hoop 81, there are fastening plates 82 extending along the axis direction of the semi-circular hoop 81. Between the fastening plates 82 and the semi-circular hoops 81, there are multiple reinforcing ribs 83 arranged at equal intervals along the axis direction of the semi-circular hoop 81. Fastening holes are provided at the positions between any two adjacent reinforcing ribs 83 on the fastening plates 82. During installation, the two semi-circular hoops 81 of the tightening member 8 are respectively clamped on the upper and lower sides of the upper chord steel pipe 1, and then bolts are inserted into the fastening holes of the two semi-circular hoops 81 and tightened with nuts to make the tightening member 8 tighten the upper chord steel pipe 1. The leveling cushion block 9 is welded to the semi-circular hoop 81, and the upper surface of the leveling cushion block 9 is a horizontal plane.

[0035] There are two first temporary steel cross beams 3 arranged in parallel at intervals. The two first temporary steel beams are respectively fixed on the two corresponding leveling cushion blocks 9 on the two upper chord steel pipes 1 and are respectively located on both sides of the old suspender 11. As Figure 6 、 Figure 7 and Figure 8 shown, the first temporary steel cross beam 3 includes two first channel steels 31 arranged back to back and in parallel at intervals, and first connecting plates 32 connected to the tops and bottoms of the two first channel steels 31. Inside the first channel steels 31, there are multiple reinforcing plates 34 arranged at intervals along the length direction of the first channel steels 31. The first connecting plates 32 are arranged at intervals along the length direction of the first channel steels 31. At the two first connecting plates 32 at both ends, there are first through holes 33 respectively, and the first through holes 33 correspond to the gaps between the two first channel steels 31 up and down. There is a steel backing plate on the top of the first temporary steel cross beam 3. There are four first temporary suspenders 5, all made of steel strands. The four first temporary suspenders 5 respectively pass through the corresponding steel backing plates and the first through holes 33. The temporary anchor 7 is arranged above the steel backing plate and is connected to the corresponding first temporary suspender 5 to tension the first temporary suspender. The temporary anchor 7 is a device for tensioning steel strands in the prior art and will not be elaborated here in detail.

[0036] The second temporary steel cross beam 4 is arranged corresponding to the first temporary steel cross beam 3 up and down, and has the same extending direction and length. As Figure 1As shown, the second temporary steel crossbeam 4 is arranged between the deck slab 12 and the lower chord steel pipe 2 of the tied-arch bridge, and there is a certain distance between it and the deck slab 12. As Figure 9 shown, the second temporary steel crossbeam 4 includes two second channel steels 41 arranged back to back and parallel at intervals, and second connecting plates 42 connected to the tops and bottoms of the two second channel steels 41. Second through holes 43 corresponding one by one to the first through holes 33 are provided on the two second connecting plates 42 at both ends, and a third through hole 44 is provided between two of the second connecting plates 42 in the middle. The first temporary suspender 5 passes through the first through hole 33 and the corresponding second through hole 43 at the same time, and is fastened at the bottom of the second temporary steel crossbeam 4.

[0037] The second temporary suspenders 6 are high-strength precision rolled threaded steel bars, and there are four of them, which are rectangularly distributed with the old suspenders 11 (the suspenders to be replaced) as the center. The four second temporary suspenders 6 respectively pass through the corresponding third through holes 44, and the tops of the second temporary suspenders 6 are fastened with nuts above the second temporary steel crossbeam 4. Of course, in other embodiments, the second temporary suspenders 6 can also be steel strands. At this time, a jack is used on the deck slab 12 to pre-tighten the second temporary suspenders 6 and the second temporary steel crossbeam 4.

[0038] As Figure 1 、 Figure 3 、 Figure 4 and Figure 5 shown, there are two lower sling steel plate bottom supports 10 arranged along the extension direction of the second temporary steel crossbeam 4. Each lower sling steel plate bottom support 10 is formed by bending and welding a 2-cm-thick steel plate, and specifically includes a bottom plate 101, side plates 102 connected to both sides of the bottom plate 101, fixing plates 103 vertically connected to the tops of each side plate 102, and multiple spaced reinforcing rib plates 104 welded between the fixing plates 103 and the side plates 102. The two fixing plates 103 on the same side of the two lower sling steel plate bottom supports 10 are located below the corresponding second temporary steel crossbeam 4. Fourth through holes 121 coaxially corresponding to the third through holes 44 are drilled on the deck slab 12, and fifth through holes 105 coaxially corresponding to the third through holes 44 are opened on the fixing plates 103. The second temporary suspenders 6 pass through the third through holes 44, the fourth through holes 121 and the fifth through holes 105 at the same time, and the bottom ends are fastened with nuts below the fixing plates 103, so that the first temporary steel crossbeam 3, the second temporary steel crossbeam 4, the lower sling steel plate bottom support 10, the first temporary suspender 5, the second temporary suspender 6 and the support assembly are connected into a whole. During installation, as Figure 4 shown, the bottom plate 101 is in contact with the bottom surface of the bridge lower crossbeam 13, and the side plates 102 are in contact with the side surface of the bridge lower crossbeam 13; there is a certain distance between the fixing plate 103 and the lower surface of the deck slab 12. Of course, in other embodiments, the fixing plate 103 and the lower surface of the deck slab 12 can also be in contact.

[0039] The utility model adopts a lower sling steel plate bottom support 10 to replace the common balance beam in the prior art. The lower sling steel plate bottom support 10 includes a bottom plate 101 that fits against the bottom surface of the bridge cross beam 13, a side plate 102 that fits against the side surface of the bridge cross beam 13, and a fixing plate 103 for installing the second temporary suspension rod 6. Compared with the balance beam in the prior art, the bottom plate 101 and the side plate 102 are thinner, and there is a large difference from the height of the balance beam and the length of the balance beam extending out of both sides of the bridge cross beam 13. In addition, the contact area between the lower sling steel plate bottom support 10 and the bridge cross beam 13 is also larger than that of the balance beam in the prior art. Therefore, it can be adapted to the replacement of the suspension rods of the through railway tied arch bridge with a low clearance height under the bridge and a short horizontal and vertical distance between the catenary carrier wire and the return line and the bridge cross beam 13. During the construction at the scheduled skylight point of the railway, the normal operation of the railway can be maintained, and the safety is higher.

[0040] The above are only the preferred embodiments of the utility model and are not intended to limit the utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. Temporary sling system for replacing the suspenders of a through railway tied-arch bridge, characterized in that It includes a first temporary suspension rod, a second temporary suspension rod, a support assembly, a first temporary steel cross beam, a second temporary steel cross beam, a temporary anchor and a bottom support plate for the lower sling. There are four groups of the support assemblies, which are arranged at intervals along the upper chord steel pipe of the tied arch bridge. The support assembly includes a clamping member for clamping on the upper chord steel pipe and a leveling cushion block connected to the clamping member. Two first temporary steel cross beams are arranged in parallel at intervals and are located on both sides of the suspension rod to be replaced. Each first temporary steel cross beam is installed on the upper surfaces of the corresponding two leveling cushion blocks. The second temporary steel cross beam is arranged corresponding to the first temporary steel cross beam up and down and has the same extension direction. The second temporary steel cross beam is used to be arranged between the bridge deck and the lower chord steel pipe of the tied arch bridge. Two of the first temporary suspension rods are connected between each first temporary steel cross beam and the corresponding second temporary steel cross beam. The top ends of the first temporary suspension rods are all connected with the temporary anchor for tensioning the first temporary suspension rods. There are two bottom support plates for the lower sling arranged along the extension direction of the second temporary steel cross beam. The bottom support plate for the lower sling includes a bottom plate, side plates connected to both sides of the bottom plate, and fixing plates vertically connected to the tops of each side plate. The fixing plates are located below the corresponding second temporary steel cross beams. The bottom plate is used to fit with the bottom surface of the under-bridge cross beam, and the side plates are used to fit with the side surfaces of the under-bridge cross beam. A second temporary suspension rod passing through the bridge deck is tightly connected corresponding to each second temporary steel cross beam and the two fixing plates below it, so that the second temporary suspension rods are distributed in a rectangle with the suspension rod to be replaced as the center.

2. The temporary sling system for replacing the suspenders of the through railway tied-arch bridge according to claim 1, wherein A plurality of reinforcing rib plates are connected between the fixing plate and the corresponding side plate, and are arranged at intervals in the extension direction of the under-bridge cross beam.

3. The temporary sling system for replacing the suspenders of the through-rail tied-arch bridge according to claim 1, wherein The fixing plate fits with the lower surface of the bridge deck.

4. The temporary sling system for replacing the suspenders of a through railway tied-arch bridge according to claim 1, characterized in that, An anti-electric insulation rubber layer is provided on the outer surface of the bottom support plate for the lower sling.

5. The temporary sling system for replacing the suspension rods of the cross-rail tied-arch bridge according to any one of claims 1-4, characterized in that, The clamping member includes two semi-circular clamping bodies. On both radial sides of each semi-circular clamping body, fastening plates extending along the axis direction of the semi-circular clamping body are connected. A plurality of reinforcing ribs are connected between the fastening plate and the semi-circular clamping body and are arranged at intervals along the axis direction of the semi-circular clamping body. A plurality of fastening holes are provided on the fastening plate and are arranged at intervals along the axis direction of the semi-circular clamping body.

6. The temporary sling system for replacing the suspenders of the cross-rail tied-arch bridge according to any one of claims 1-4, characterized in that, The second temporary suspension rod is a rolled thread steel bar.

7. The temporary sling system for replacing the suspenders of a through railway tied-arch bridge according to any one of claims 1-4, characterized in that, The first temporary steel cross beam includes two first channel steels arranged back to back and in parallel at intervals, and first connecting plates connected to the tops and bottoms of the two first channel steels. A plurality of reinforcing plates are welded on the inner sides of the first channel steels and are arranged at intervals along the length direction of the first channel steels. First through holes are respectively provided on the two first connecting plates at both ends, and the first through holes correspond to the gaps between the first temporary suspension rod and the two first channel steels up and down.

8. The temporary sling system for replacing the suspenders of the through tied-arch bridge across the railway according to claim 7, characterized in that, The second temporary steel cross beam includes two second channel steels arranged back to back and in parallel at intervals, and second connecting plates connected to the tops and bottoms of the two second channel steels. Second through holes corresponding to the first through holes one by one are provided on the two second connecting plates at both ends, and third through holes corresponding to the second temporary suspension rods one by one are provided between two of the second connecting plates between the two ends.

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