CN109487709B - One-side riding type temporary rope self-balancing pushing type suspension bridge sling replacement underpinning device - Google Patents
One-side riding type temporary rope self-balancing pushing type suspension bridge sling replacement underpinning device Download PDFInfo
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- CN109487709B CN109487709B CN201811500732.1A CN201811500732A CN109487709B CN 109487709 B CN109487709 B CN 109487709B CN 201811500732 A CN201811500732 A CN 201811500732A CN 109487709 B CN109487709 B CN 109487709B
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- 239000000725 suspension Substances 0.000 title claims abstract description 75
- 238000009424 underpinning Methods 0.000 title claims abstract description 28
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 20
- 239000010959 steel Substances 0.000 claims abstract description 20
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 24
- 230000009021 linear effect Effects 0.000 abstract description 6
- 238000012423 maintenance Methods 0.000 abstract description 2
- 230000002787 reinforcement Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 10
- 238000009434 installation Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D22/00—Methods or apparatus for repairing or strengthening existing bridges ; Methods or apparatus for dismantling bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/16—Suspension cables; Cable clamps for suspension cables ; Pre- or post-stressed cables
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses a suspension cable replacement underpinning device of a one-side riding type temporary cable self-balancing pushing type suspension bridge, which belongs to the technical field of civil engineering suspension bridge maintenance and reinforcement engineering and comprises an inclined main cable, wherein a steel box girder (13) is arranged below the main cable, an ear plate is arranged on the upper surface of the steel box girder (13), a plurality of permanent cable clamps are arranged on the main cable, the top ends of the permanent suspension cables are connected with the permanent cable clamps, the bottom ends of the permanent suspension cables are connected with the ear plate, and a pin shaft hole is reserved on the ear plate. The suspension cable replacement underpinning device for the one-side riding type temporary cable self-balancing pushing type suspension bridge solves the problem of replacement of the suspension cable when the suspension cable bridge suspension cable ear plate is provided with only one suspension hole, avoids the condition of replacing one suspension cable by multi-point lifting, and has the advantages of less overhead working amount, simple construction and small linear internal force deflection of the main cable and the stiffening beam of the existing suspension bridge.
Description
Technical Field
The invention relates to a suspension cable replacement underpinning device of a one-side riding type temporary cable self-balancing pushing type suspension bridge, and belongs to the technical field of civil engineering suspension bridge maintenance and reinforcement engineering.
Background
Suspension bridge slings are one of the most vulnerable, critical stress members of the suspension bridge components, the design life is only 20 years, whereas suspension bridges are generally designed for over 100 years, so that slings need to be replaced at least 4-6 times during the design life of a suspension bridge.
Compared with the sling installation during bridge construction, the sling replacement of the suspension bridge during service is not available for the anchor way and the hoisting equipment, the problems of no interruption of traffic, high-altitude operation, narrow construction surface and the like are faced, and two kinds of construction of removing the old cable and installing the new cable exist, so that the construction process is complex. If the suspension bridge sling underpinning system is not good, the sling replacement construction process can easily influence the line shape and the internal force of the suspension bridge structure, so that the internal force and the line shape of the structure before and after replacement are greatly changed. It can be seen that the hanger rod of the suspension bridge is replaced with a large difficulty, a complex construction process and high replacement cost.
Although there are cases of replacing slings of the Yangtze river bridge and the natural anchoring type concrete suspension bridge of the Qinghai lake in China, the related technical data are still less. The literature 'detection and replacement of abnormal sound wire rope short sling of a large-span suspension bridge' and patent 1 (CN 207685669U) disclose a device and a process for replacing the short sling of a large-span bridge in the river, and the core technology is that a temporary rope is arranged on one side of a permanent rope, the tension is carried out to reduce the rope force of the permanent rope to zero, and then the sling is dismantled. The method adopts single-point replacement, when the tension of the temporary rope is small, the cable force exists in the sling to be replaced, and the pin shaft is difficult to remove; when the cable force of the temporary cable is tensioned to zero, the cable force of the temporary cable is very large, the lug plates are already yielding and are subjected to plastic deformation, and meanwhile, the linear deflection of the main cable and the stiffening beam is also large due to the large cable force. Patent 2 (CN 202214681U) describes a sling replacement device for a suspension bridge, which installs a temporary rope tensioning device on one side of a sling to be replaced, and arranges a through-type load sensor for real-time monitoring. A short sling replacing device is disclosed, a temporary tensioning device is arranged on one side of a temporary sling, the cable force of the sling to be replaced is lowered through tensioning, and the same problems as in patent 1 exist. Patent 3 (CN 106480822 a) discloses a suspension bridge sling replacement system and a method for replacing a suspension bridge sling, which gives a process how to pay out and hang a cable after an old cable is removed or before a new cable is installed, and does not give a construction process and a device how to make the force of a sling to be replaced zero, and the missing part is the core and key content of suspension bridge sling replacement. The literature "engineering construction and monitoring for replacement of suspension cable in Shanzhi Bay bridge test suspension cable" discloses a suspension cable bridge suspension cable replacement mode, which firstly sets up trusses on the bridge deck, supports adjacent suspension cable crossbeams, and uses the lifting holes set during the lifting construction of the prefabricated sections of the original main beam to pre-lift the beam body. Then, replacement of slings is performed in two ways: the anchor bolt of the sling is lengthened, an upper supporting frame and a lower supporting frame are arranged on an anchor plate and the anchor bolt which is lengthened, a jack is arranged in the middle of the anchor plate, the upper supporting frame and the lower supporting frame are driven to lift by the jack, and nuts of the original anchor bolt are loosened to realize replacement. The other mode is that the stiffening girder is provided with a counter-force beam up and down, and the sling is replaced by lifting the inner force of the lifting counter-force Liang Xiezai sling. The cable replacement scheme has obvious advantages over the prior scheme, and the cable replacement scheme can only pre-lift the girder body by 400 and kN without reducing the cable force of the sling to be replaced to zero, so that the aim of least linear and internal force interference on the stiffening girder of the suspension bridge is fulfilled. In order to solve the problem that the cable force of the temporary cable is overlarge when the single-point crane is replaced, when the nearest one sling is replaced, the scheme of replacing one sling by adopting five lifting points is adopted, so that the replacement of the sling is successfully realized. The method has the characteristics of more construction operation surfaces, large influence on the state of the existing bridge and wide range.
It can be seen that the technology for replacing the sling of the suspension bridge has been deeply studied in China. However, the invention aims at solving the problem that only one lug hole steel anchor box lug plate is reserved for a similar river-to-female bridge, and the replacement of slings is realized under the conditions of smaller overhead working load and less flexible movement to the original bridge. The invention is characterized in that a new sling replacement underpinning system is designed under the condition that only one sling hole is reserved on the existing sling bridge sling lug plate.
Disclosure of Invention
The invention provides a novel sling replacement underpinning device aiming at the construction condition that only one sling hole is reserved on the existing sling bridge sling plate, and solves the problems of high construction cost, large influence on the existing state of a bridge structure, complex construction process, large difficulty and the like when the sling of a suspension bridge is replaced.
In order to solve the technical problems, the invention adopts the following technical scheme:
the device comprises an inclined main cable, wherein a steel box girder is arranged below the main cable, an ear plate is arranged on the upper surface of the steel box girder, a plurality of permanent cable clamps are arranged on the main cable, the top ends of the permanent cable clamps are connected with the permanent cable clamps, the bottom ends of the permanent cable clamps are connected with the ear plate, and a pin shaft hole is reserved on the ear plate;
the main cable at the high end of the permanent cable clamp is provided with a temporary cable clamp, the middle part of the temporary sling is arranged on the temporary cable clamp in a riding mode and extends downwards, two bottom ends of the temporary sling are connected with a temporary sling shoulder pole beam, a temporary sling tensioning screw rod is connected between the temporary sling shoulder pole beam and the lug plate, and the top end of the temporary sling tensioning screw rod penetrates out of the temporary sling shoulder pole beam and then sequentially passes through temporary sling tensioning support feet and a temporary sling tensioning jack to be fixed by a temporary sling tensioning pull rod nut; the bottom end of the temporary sling tensioning screw is connected with a temporary cable tensioning screw connecting fork lug, and a tensioning screw pin shaft sequentially penetrates through a through hole in the temporary cable tensioning screw connecting fork lug and a pin shaft hole in the lug plate and is fixed;
the lug plates of the adjacent permanent slings are connected with the bottom ends of the main pull rods of the adjacent slings, the top ends of the main pull rods of the adjacent slings are connected with the shoulder pole beams of the adjacent slings, and two counter-force beams are connected between the shoulder pole beams of the adjacent slings and the temporary shoulder pole beams of the temporary slings;
the middle lower end of the permanent sling to be replaced is provided with a permanent cable stretching shoulder pole beam, the permanent cable stretching shoulder pole beam is a pair of split beams, and the split beams sleeve the permanent sling to be replaced; and the permanent cable tensioning shoulder pole beam is provided with a permanent cable tensioning jack which is connected with the counter-force beam.
The two ends of the permanent sling are respectively provided with a first connecting fork lug, and the first connecting fork lugs are fixedly connected with the lug plates or the permanent sling clamps through permanent sling pin shafts.
The temporary rope clamp is a clamp ring structure for sleeving the main rope, and a notch for accommodating the temporary sling is formed in the top end of the clamp ring structure.
The utility model discloses a temporary sling shoulder pole beam, including interim sling shoulder pole beam, interim sling shoulder pole beam central authorities are provided with the tension rod hole that is used for passing interim sling tensioning screw rod top, interim sling shoulder pole beam both ends are provided with the interim rope hole that is used for fixing interim sling.
The two split beams of the permanent cable tensioning shoulder pole beam are fixedly connected through a C-shaped sleeve.
The counter-force beam is an I-shaped steel beam, and a plurality of webs and transverse stiffening plates are arranged on the I-shaped steel beam.
The temporary rope clamp is thin-wall and light.
The thin-wall lightweight includes the temporary cable clamp made of an iron sheet or a copper sheet having a thickness of less than 0.5 cm.
The permanent cable tension shoulder pole beam is positioned at an anchor cup of the permanent sling to be replaced.
The suspension cable replacement underpinning device for the one-side riding type temporary cable self-balancing pushing type suspension bridge provided by the invention has the advantages that the temporary suspension cable is in riding type, the temporary cable clamp is only stressed, and only thin-wall light materials are needed to be used for manufacturing, so that the temporary cable clamp is light and convenient to install and construct. The temporary rope clamp has the function of safety protection on the main rope and prevents the main rope from being scratched by the temporary sling; the temporary sling of the invention only needs to be tensioned to the target cable force, and no huge tensioning force is needed to be applied, so that the cable force of the permanent sling to be replaced is reduced to zero. The temporary sling has the functions of unloading the permanent sling to be replaced and safety protection during construction of the permanent sling to be replaced.
The invention has the following advantages: 1. the suspension cable replacement device can adapt to suspension cable replacement operation of various suspension bridges with different suspension cable intervals and suspension cable lengths by reserving a suspension cable hole on a steel box girder lug plate; 2. the temporary sling adopts a riding type, and the temporary sling clamp only bears pressure, so that the temporary sling clamp only needs to be made thin-wall light and has low material cost; 3. the inner force and the linear influence on the main cable, the main girder and the permanent sling are small, the influence on the surrounding cable force is also small, the construction is safe and convenient when the permanent sling is replaced, and the construction period is short.
The suspension cable replacement underpinning device for the one-side riding type temporary cable self-balancing pushing type suspension bridge solves the problem of replacement of the suspension cable when the suspension cable bridge suspension cable ear plate is provided with only one suspension hole, avoids the condition of replacing one suspension cable by multi-point lifting, and has the advantages of less overhead working amount, simple construction and small linear internal force deflection of the main cable and the stiffening beam of the existing suspension bridge.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic view of a reaction beam according to the present invention;
FIG. 3 is a schematic view of a temporary sling carrying beam according to the present invention;
FIG. 4 is a schematic structural view of a permanent cable tension shoulder pole beam of the present invention;
FIG. 5 is a schematic view of the structure of the temporary sling tensioning screw of the present invention;
FIG. 6 is a schematic view of the temporary rope clip of the present invention;
wherein: 1. temporary cable clamp, 2, temporary sling, 3, temporary sling shoulder pole beam, 4, temporary sling tensioning supporting feet, 5, temporary sling tensioning jack, 6, temporary sling tensioning pull rod nut, 7, temporary sling tensioning screw, 8, temporary cable tensioning screw connecting fork lugs, 9, tensioning screw pin, 10, permanent cable tensioning jack, 11, permanent cable tensioning shoulder pole beam, 12, counter-force beam, 13, steel box beam, 14, adjacent sling shoulder pole beam, 15, adjacent sling main pull rod, 16, notch, 17, tensioning pull rod hole, 18, temporary cable hole, 19, web, 20 and transverse stiffening plate.
Detailed Description
The invention will be further described with reference to the accompanying drawings.
As shown in fig. 1-6, a suspension cable replacement underpinning device of a one-side riding type temporary cable self-balancing pushing suspension bridge comprises an inclined main cable, a steel box girder 13 is arranged below the main cable, an ear plate is arranged on the upper surface of the steel box girder 13, a plurality of permanent cable clamps are arranged on the main cable, the top ends of the permanent suspension cables are connected with the permanent cable clamps, the bottom ends of the permanent suspension cables are connected with the ear plate, and a pin shaft hole is reserved on the ear plate;
the main cable at the high end of the permanent cable clamp is provided with a temporary cable clamp 1, the middle part of a temporary sling 2 is arranged on the temporary cable clamp 1 in a riding mode and extends downwards, two bottom ends of the temporary sling 2 are connected with a temporary sling shoulder pole beam 3, a temporary sling tensioning screw 7 is connected between the temporary sling shoulder pole beam 3 and the lug plate, and the top end of the temporary sling tensioning screw 7 penetrates through the temporary sling shoulder pole beam 3 and then sequentially passes through a temporary sling tensioning supporting foot 4 and a temporary sling tensioning jack 5 to be fixed by a temporary sling tensioning rod nut 6; the bottom end of the temporary sling tensioning screw 7 is connected with a temporary cable tensioning screw connecting fork lug 8, and a tensioning screw pin shaft 9 sequentially penetrates through a through hole in the temporary cable tensioning screw connecting fork lug 8 and a pin shaft hole in the lug plate and is fixed;
the lug plates of the adjacent permanent slings are connected with the bottom ends of the main pull rods 15 of the adjacent slings, the top ends of the main pull rods 15 of the adjacent slings are connected with the shoulder pole beams 14 of the adjacent slings, and two counter-force beams 12 are connected between the shoulder pole beams 14 of the adjacent slings and the shoulder pole beams 3 of the temporary slings; the two counter-force beams 12 are symmetrically arranged, and each counter-force beam 12 is connected between the same ends of the adjacent sling shoulder pole beam 14 and the temporary sling shoulder pole beam 3;
the middle and lower ends of the permanent slings to be replaced are provided with permanent rope stretching shoulder pole beams 11, the permanent rope stretching shoulder pole beams 11 are a pair of split beams, and the split beams sleeve the permanent slings to be replaced; a permanent cable tensioning jack 10 is arranged on the permanent cable tensioning shoulder pole beam 11, and the permanent cable tensioning jack 10 is connected with the counter-force beam 12.
The two ends of the permanent sling are respectively provided with a first connecting fork lug, and the first connecting fork lugs are fixedly connected with the lug plates or the permanent sling clamps through permanent sling pin shafts.
The temporary rope clip 1 is a snap ring structure for sleeving the main rope, and a notch 16 for accommodating the temporary sling 2 is arranged at the top end of the snap ring structure.
The center of the temporary sling shoulder pole beam 3 is provided with a tension rod hole 17 for penetrating through the top end of the temporary sling tension screw 7, and two ends of the temporary sling shoulder pole beam 3 are provided with temporary rope holes 18 for fixing the temporary sling 2.
The two split beams of the permanent cable stretching shoulder pole beam 11 are fixedly connected through a C-shaped sleeve.
The reaction beam 12 is an I-beam, and a plurality of webs 19 and transverse stiffening plates 20 are arranged on the I-beam.
The temporary rope clip 1 is thin-walled and light.
The thin-walled lightweight comprises the temporary rope clip 1 made of an iron sheet or a copper sheet with a thickness of less than 0.5 cm.
The permanent cable tension shoulder pole beam 11 is located at the anchor cup of the permanent slings to be replaced.
In the embodiment, a pin shaft hole reserved in the suspension bridge suspension lug plate is fully utilized, and a temporary sling 2 is arranged on one side of the permanent cable clamp. The upper end of the temporary sling 2 is in a riding type, the other end of the temporary sling 2 is connected with the temporary sling shoulder pole beam 3 through a nut, and a hole is reserved in the center of the temporary sling shoulder pole beam 3, so that a temporary sling tensioning screw 7 can conveniently penetrate through the temporary sling. On the upper side of the temporary sling shoulder pole beam 3, a temporary sling tensioning support leg 4, a temporary sling tensioning jack 5 and a temporary sling tensioning pull rod nut 6 are placed.
The underpinning device related to the embodiment comprises a temporary rope clamp 1, a temporary sling 2, a temporary sling shoulder pole beam 3, a temporary sling tensioning screw 7, a temporary sling tensioning pull rod nut 6, temporary sling tensioning supporting feet 4, a temporary sling tensioning jack 5, a temporary rope tensioning screw connecting fork lug 8, a sling tensioning system to be replaced (comprising a counter-force beam 12, a permanent rope tensioning shoulder pole beam 11, a permanent rope tensioning jack 10), an adjacent sling shoulder pole beam 14, an adjacent sling main pull rod 15 and the like. The underpinning device is mainly technically characterized in that:
1. the temporary sling 2 is arranged on one side of the sling to be replaced, the upper end of the temporary sling 2 is connected with the main cable by a riding type, the temporary sling clamp 1 is only pressed and not pulled, the lower end of the temporary sling clamp is provided with the temporary sling shoulder pole beam 3, and a tension rod hole 17 is reserved in the center of the temporary sling shoulder pole beam 3, so that the temporary sling tension screw 7 can conveniently penetrate through the temporary sling. The lower end fork lugs of the temporary sling tensioning screw rods 7 are connected with the upper lug plates of the steel box girders 13 by adopting pin bolts. The temporary sling tensioning jack 5 pushes and pulls the temporary sling tensioning screw 7, and applies a cable force to the temporary sling 2. The temporary sling 2 has the function of unloading the permanent sling to be replaced on one hand and has the function of safety protection during construction of the permanent sling to be replaced on the other hand.
2. The underpinning device fully considers that the suspension bridge suspension lug plates are reserved with only one pin shaft hole, and a self-balancing counterforce system is formed when the permanent sling is dismounted by reserving one pin shaft hole on the adjacent suspension lug plates. One end of the arranged counter-force beam 12 is connected with the temporary sling shoulder pole beam 3 at one side arranged beside the permanent sling to be replaced, and the other end is connected with a main pull rod (namely an adjacent sling main pull rod 15) connected with an adjacent permanent sling ear plate. In this way, the temporary sling shoulder pole beam 3, the temporary sling tensioning screw 7, the temporary sling tensioning pull rod nut 6, the temporary sling tensioning screw connecting fork lugs 8 and pin shafts, the permanent sling steel box beam 13 lug plates to be replaced, the counter-force beam 12, the adjacent permanent sling steel box beam 13 lug plates, the adjacent sling main pull rod 15, the lower end connecting fork lugs and pin shafts thereof and the upper end nuts form a self-balancing system.
3. The force transmission sequence when the underpinning device carries out permanent sling replacement is as follows: the permanent cable tensioning jack 10- & gt the counter-force beam 12- & gt the temporary sling shoulder pole beam 3 (the adjacent sling shoulder pole beam 14- & gt the temporary sling tensioning pull rod nuts 6 at the two ends of the counter-force beam 12- & gt the temporary sling tensioning screw rods 7 at the two ends of the counter-force beam 12 and the adjacent sling main pull rod 15- & gt the temporary cable tensioning screw rods at the two ends are connected with the fork lugs 8 and the fork lugs of the adjacent sling main pull rod 15- & gt the pin shafts and the steel box girder 13 lug plates. The force transmission path at the other end of the permanent cable tensioning jack 10 is: permanent cable tensioning jack 10-permanent cable tensioning shoulder pole beam 11-permanent sling to be replaced.
4. By adopting the construction mode for replacing the permanent sling, the influence on the internal force and the linear effect on the main cable, the main girder and the permanent sling is small, the influence on the surrounding cable force is also small, the construction is safe and convenient when the permanent sling is replaced, and the construction period is short.
The mounting steps of this embodiment are as follows:
step 1: preparation before construction
According to the dimensional diagram of the sling replacement underpinning device, lofting, blanking, assembling, drilling and welding are carried out. Detecting the cable force of a sling to be replaced and preparing work (a winch, materials, components and the like) before construction;
step 2: temporary sling mounting
Installing a temporary rope clamp 1, a temporary sling 2, a temporary sling shoulder pole beam 3, a temporary sling tensioning screw 7, temporary sling tensioning supporting feet 4, a temporary sling tensioning jack 5 and a temporary sling tensioning pull rod nut 6, and tensioning the temporary sling 2 to a target rope force to transfer part of the rope force of the old permanent sling to the temporary sling 2;
step 3: permanent sling, permanent cable clamp and installation of replacement underpinning device
A permanent cable tensioning shoulder pole beam 11, a permanent cable tensioning jack 10, a counter-force beam 12, an adjacent sling shoulder pole beam 14 and an adjacent sling main pull rod 15 are arranged.
Step 4: removal of permanent slings to be replaced
Pushing the counter-force beam 12 by using the permanent cable tensioning jack 10, pulling the permanent cable tensioning shoulder pole beam 11, tensioning the permanent sling to be replaced, transferring the cable force of the old permanent sling to the temporary sling tensioning screw 7, enabling the permanent sling pin shaft to be in a stress-free state, removing the permanent sling pin shaft, slowly unloading the permanent cable tensioning jack 10, removing the tensioning system, and removing the old permanent sling; and then removing the permanent sling pin shaft at the upper end of the old permanent sling by using a winch, and slowly placing the old sling on the bridge deck.
Step 5: new cable installation
The new permanent sling is pulled by a winch to be provided with an upper permanent sling pin roll, then a permanent cable tensioning shoulder pole beam 11 and a counter-force beam 12 are provided, a permanent cable tensioning jack 10 is used for pushing the counter-force beam 12 and the permanent cable tensioning shoulder pole beam 11, the new cable is tensioned, a connecting fork lug of the new cable is concentric with an ear plate reserved hole of a steel box girder 13, the permanent sling pin roll is provided, and a tensioning system is removed;
step 6, repeating the step 4 and the step 5, removing another old rope and installing another new rope;
step 7: removing the underpinning means and temporary slings
And (3) removing the sling replacement underpinning device, namely, the temporary sling 2, the temporary sling shoulder pole beam 3, the temporary sling tensioning screw 7, the temporary sling clamp 1 and the like, transferring the cable force of the temporary sling 2 to a pair of new permanent slings, and redistributing the cable force of the slings, wherein the sling replacement is completed.
The foregoing is only a preferred embodiment of the invention, it being noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the present invention, and such modifications and adaptations are intended to be comprehended within the scope of the invention.
Claims (9)
1. One side rides and strides formula interim cable self-balancing top formula suspension bridge hoist cable and changes underpinning device, its characterized in that: the cable comprises an inclined main cable, a steel box girder (13) is arranged below the main cable, an ear plate is arranged on the upper surface of the steel box girder (13), a plurality of permanent cable clamps are arranged on the main cable, the top ends of permanent slings are connected with the permanent cable clamps, the bottom ends of the permanent slings are connected with the ear plate, and a pin shaft hole is reserved on the ear plate;
the main cable at the high end of the permanent cable clamp is provided with a temporary cable clamp (1), the middle part of a temporary sling (2) is arranged on the temporary cable clamp (1) in a riding mode and extends downwards, two bottom ends of the temporary sling (2) are connected with a temporary sling shoulder pole beam (3), a temporary sling tensioning screw (7) is connected between the temporary sling shoulder pole beam (3) and the lug plate, and the top end of the temporary sling tensioning screw (7) penetrates through the temporary sling shoulder pole beam (3) and then sequentially penetrates through a temporary sling supporting leg (4) and a temporary sling tensioning jack (5) to be fixed by a temporary sling tensioning pull rod nut (6); the bottom end of the temporary sling tensioning screw (7) is connected with a temporary cable tensioning screw connecting fork lug (8), and a tensioning screw pin shaft (9) sequentially penetrates through a through hole in the temporary cable tensioning screw connecting fork lug (8) and a pin hole in the lug plate and then is fixed;
the lug plates of the adjacent permanent slings are connected with the bottom ends of the main pull rods (15) of the adjacent slings, the top ends of the main pull rods (15) of the adjacent slings are connected with the shoulder pole beams (14) of the adjacent slings, and two counter-force beams (12) are connected between the shoulder pole beams (14) of the adjacent slings and the shoulder pole beams (3) of the temporary slings;
the middle and lower ends of the permanent slings to be replaced are provided with permanent rope stretching shoulder pole beams (11), the permanent rope stretching shoulder pole beams (11) are a pair of split beams, and the permanent slings to be replaced are sleeved by the split beams; a permanent cable tensioning jack (10) is arranged on the permanent cable tensioning shoulder pole beam (11), and the permanent cable tensioning jack (10) is connected with the counter-force beam (12).
2. The one-sided riding type temporary rope self-balancing pushing type suspension bridge sling replacement underpinning device according to claim 1, wherein: the two ends of the permanent sling are respectively provided with a first connecting fork lug, and the first connecting fork lugs are fixedly connected with the lug plates or the permanent sling clamps through permanent sling pin shafts.
3. The one-sided riding type temporary rope self-balancing pushing type suspension bridge sling replacement underpinning device according to claim 1, wherein: the temporary rope clamp (1) is a clamp ring structure for sheathing the main rope, and a notch (16) for accommodating the temporary sling (2) is formed in the top end of the clamp ring structure.
4. The one-sided riding type temporary rope self-balancing pushing type suspension bridge sling replacement underpinning device according to claim 1, wherein: the utility model discloses a temporary sling shoulder pole beam, including interim hoist cable shoulder pole beam (3), interim hoist cable shoulder pole beam (3) central authorities are provided with be used for passing interim hoist cable tensioning screw (7) top stretch-draw pole hole (17), interim hoist cable shoulder pole beam (3) both ends are provided with be used for fixing interim cable hole (18) of interim hoist cable (2).
5. The one-sided riding type temporary rope self-balancing pushing type suspension bridge sling replacement underpinning device according to claim 1, wherein: the two split beams of the permanent cable stretching shoulder pole beam (11) are fixedly connected through a C-shaped sleeve.
6. The one-sided riding type temporary rope self-balancing pushing type suspension bridge sling replacement underpinning device according to claim 1, wherein: the counter-force beam (12) is an I-shaped steel beam, and a plurality of webs (19) and transverse stiffening plates (20) are arranged on the I-shaped steel beam.
7. The one-sided riding type temporary rope self-balancing pushing type suspension bridge sling replacement underpinning device according to claim 1, wherein: the temporary rope clamp (1) is thin-wall and light.
8. The one-sided riding type temporary rope self-balancing pushing type suspension bridge sling replacement underpinning device according to claim 7, wherein: the thin-walled lightweight comprises the temporary cable clamp (1) made of an iron sheet or a copper sheet with a thickness of less than 0.5 cm.
9. The one-sided riding type temporary rope self-balancing pushing type suspension bridge sling replacement underpinning device according to claim 1, wherein: the permanent cable tension shoulder pole beam (11) is positioned at an anchor cup of the permanent sling to be replaced.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811500732.1A CN109487709B (en) | 2018-12-10 | 2018-12-10 | One-side riding type temporary rope self-balancing pushing type suspension bridge sling replacement underpinning device |
Applications Claiming Priority (1)
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| CN109914273B (en) * | 2019-03-20 | 2023-11-21 | 中交路桥建设有限公司 | Device and method for replacing riding type sling of suspension bridge |
| CN111305033B (en) * | 2019-11-22 | 2021-04-13 | 柳州欧维姆机械股份有限公司 | Connecting structure, fixing structure, new main cable system and construction method for replacing main cable of suspension bridge |
| CN110820522A (en) * | 2019-11-22 | 2020-02-21 | 柳州欧维姆机械股份有限公司 | Sling conversion device for replacing main cable of suspension bridge, sling and construction method |
| CN111996930B (en) * | 2020-09-15 | 2022-04-19 | 兰州交通大学工程检测有限公司 | Replacing structure and replacing method for reinforced concrete through arch bridge suspender |
| CN113235461B (en) * | 2021-04-15 | 2022-10-28 | 江苏法尔胜缆索有限公司 | Method for repairing suspension bridge cable clamp ear hole and box girder ear hole |
| CN114150891B (en) * | 2021-12-30 | 2023-03-14 | 柳州欧维姆工程有限公司 | Inhaul cable replacing method for space cable net supporting structure |
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