CN109537476B - Pin lug type double-temporary-rope self-balancing pulling type suspension bridge sling replacement underpinning device - Google Patents
Pin lug type double-temporary-rope self-balancing pulling type suspension bridge sling replacement underpinning device Download PDFInfo
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- CN109537476B CN109537476B CN201811500360.2A CN201811500360A CN109537476B CN 109537476 B CN109537476 B CN 109537476B CN 201811500360 A CN201811500360 A CN 201811500360A CN 109537476 B CN109537476 B CN 109537476B
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- 239000000725 suspension Substances 0.000 title claims abstract description 57
- 238000009424 underpinning Methods 0.000 title claims abstract description 33
- 229910000831 Steel Inorganic materials 0.000 claims description 9
- 239000010959 steel Substances 0.000 claims description 9
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 abstract description 2
- 230000002787 reinforcement Effects 0.000 abstract description 2
- 238000010276 construction Methods 0.000 description 23
- 238000000034 method Methods 0.000 description 14
- 230000008569 process Effects 0.000 description 10
- 238000004873 anchoring Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 230000005540 biological transmission Effects 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
- 238000004080 punching Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 241000251468 Actinopterygii Species 0.000 description 1
- 210000001015 abdomen Anatomy 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 238000009736 wetting 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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Abstract
The invention discloses a pin lug type double-temporary-rope self-balancing pulling type suspension bridge sling replacement underpinning device, which belongs to the technical field of civil engineering suspension bridge maintenance and reinforcement engineering and comprises a permanent rope clamp (18), wherein a box type Liang Erban (16) is arranged below the permanent rope clamp (18), the top end of a permanent rope (17) is connected with the permanent rope clamp (18), and the bottom end of the permanent rope (17) is connected with the box type Liang Erban (16). According to the pin lug type double-temporary-rope self-balancing pulling type suspension bridge sling replacement underpinning device, when the sling is replaced, the temporary rope is not required to be pulled until the cable force of the sling to be replaced is zero, the self-balancing device is directly utilized, the sling to be replaced is pulled by a jack, so that the pin roll stress of the sling to be replaced is zero, the linear and internal force deflection of a main cable and a stiffening girder of the existing suspension bridge is small, and the structure is safe.
Description
Technical Field
The invention relates to a pin lug type double-temporary-rope self-balancing pulling type suspension bridge sling replacement underpinning device, 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 relies on the engineering of replacing the suspension cable of the large bridge, and the problem of replacing the suspension cable is a new situation: firstly, the construction of the steel anchor box ear plate of the moistening and raising bridge is different from that of a river-yin bridge and a Shanzhu bay bridge, two lifting lug holes are reserved in the river-yin bridge, only one lifting lug hole is reserved in the river-yin bridge, a single-box three-chamber thin-wall fish belly section prestressed reinforced concrete box girder is adopted as a main girder of the Shanzhu bay bridge, and the lifting lug plate is not arranged. Secondly, the sling forms of the seat bridges are different. The sling of the river-yin bridge adopts a steel wire rope, two ends of the sling adopt pin shaft type fork-shaped ear plate slings, and the anchor cup is made into a vase shape; the Shanzhi Bay bridge adopts riding type steel wire rope hanging ropes, and the connection between the reinforced beam and the reinforced beam adopts a pre-embedded anchor bolt type. The sling of the wetting and lifting bridge adopts parallel steel wires, and the anchor cup is conical although the two ends of the sling adopt pin shaft type fork-shaped ear plates. In summary, the replacement of the sling of the bridge cannot be completed by the prior art, and the sling replacement underpinning system is designed on the basis of fully researching the structures of the upper anchoring end and the lower anchoring end of the sling of the bridge.
Disclosure of Invention
Aiming at the defects of the existing suspension bridge sling replacement underpinning system and combining the structure of the upper and lower anchoring ends of the suspension bridge sling, the invention provides a pin lug type double-temporary-rope self-balancing pulling type suspension bridge sling replacement underpinning device, which solves the problems of high construction cost, great influence on the existing state of a bridge structure, complex construction process, great difficulty and the like when the suspension bridge sling is replaced.
In order to solve the technical problems, the invention adopts the following technical scheme:
the pin lug type double-temporary-rope self-balancing pulling type suspension bridge sling replacement underpinning device comprises a permanent rope clamp, wherein a box type Liang Erban is arranged below the permanent rope clamp, the top end of the permanent rope is connected with the permanent rope clamp, and the bottom end of the permanent rope is connected with the box type Liang Erban;
the middle lower part of the permanent cable is symmetrically provided with counter-force beams, the permanent cable to be replaced is provided with a permanent cable tensioning cable clamp, both sides of the permanent cable tensioning cable clamp are connected with permanent cable tensioning pull rods extending downwards, and the bottom ends of the permanent cable tensioning pull rods penetrate through the counter-force beams and then sequentially penetrate through permanent cable tensioning supporting feet and a permanent cable tensioning center-penetrating jack to be fixed;
the same ends of the two counterforce beams are placed on the temporary sling tensioning anchor cup, temporary cable clamps are arranged on two sides of the permanent cable clamps, temporary cables are arranged between the temporary cable clamps and the temporary sling tensioning anchor cup on the same side, the bottom ends of the temporary sling tensioning screws are connected with temporary sling fork ear beams, temporary sling fork ear plates are arranged on the lower surfaces of the temporary sling fork ear beams and the top ends of the temporary cables, and temporary sling pin shafts penetrate through holes in the temporary sling fork ear plates to be fixed; the top end of the temporary sling tensioning screw rod penetrates through the temporary sling tensioning anchor cup and then sequentially penetrates through the temporary sling tensioning support leg and the temporary sling tensioning jack, and is fixed by the temporary sling tensioning pull rod nut.
The two ends of the permanent rope are provided with permanent sling fork-shaped lug plates, and the permanent sling fork-shaped lug plates are fixedly connected with the box-type beam lug plates or the permanent rope clamps through permanent rope pin shafts.
Two through holes which are convenient for the temporary sling tensioning screws to pass through are reserved on each temporary sling tensioning anchor cup, namely the number of the temporary sling tensioning screws is 4.
And stripping the PE sheath of the permanent cable to be replaced at the middle part of the permanent cable to be replaced, and clamping the permanent cable tensioning cable clamp.
The clamping part of the permanent cable tensioning cable clamp is 3-5 m away from the anchor cup of the permanent cable to be replaced.
The permanent cable stretching cable clamp consists of a pair of clamping plates with the thickness of 2-3 cm, the permanent cable stretching cable clamp is square, a first through hole for allowing the permanent cable to be replaced to pass through and second through holes arranged on two sides of the first through hole for allowing two permanent cable stretching rods to pass through are reserved in the middle of the permanent cable stretching cable clamp, and a plurality of bolt fixing holes penetrating through the two clamping plates are formed in the side face of the permanent cable stretching cable clamp.
The counterforce beam is a steel box beam, and holes which are convenient for the temporary sling tensioning screw rod and the permanent cable tensioning pull rod to pass through are reserved at the positions of the counterforce beam, which are parallel to the permanent cables, at the anchor cup.
And the reaction beam is provided with a web plate and a transverse stiffening plate at the acting force position of the permanent cable tensioning core-penetrating jack.
The invention provides a pin lug type double-temporary-rope self-balancing pulling type suspension bridge sling replacement underpinning device, wherein a temporary rope of the underpinning device adopts a pin lug type, a temporary rope clamp adopts the same structural form as a permanent rope clamp, and the temporary rope clamp is connected with the temporary rope through a pin shaft; the temporary rope of the underpinning device only needs to be stretched to the target rope force, and huge stretching force is not needed to be applied, so that the rope force of the sling to be replaced is reduced to zero. The temporary rope has the functions of reducing the rope force (not zero) of the sling to be replaced and providing safety guarantee for the whole rope replacement process.
The invention has the following advantages: 1. two suspension lug holes can be reserved for the suspension lug anchor plate, and the suspension rope replacement operation of various suspension bridges with different suspension rope intervals and suspension rope lengths can be adapted; 2. the temporary rope adopts a pin lug type, and the temporary rope clamp adopts the same structure as the permanent rope clamp; 3. when the sling is replaced, the cable force of the temporary cable stretching the sling to be replaced is zero, and then the sling to be replaced is directly pulled by a jack by utilizing a self-balancing device, so that the pin roll stress of the sling to be replaced is zero; 4. the linear and internal force deflection of the main cable and the stiffening girder of the existing suspension bridge is small, and the structure is safe; 5. the underpinning system can be used for replacing slings at the position close to the bridge tower.
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 the structure of the temporary sling tensioning anchor cup of the present invention;
FIG. 4 is a schematic view of the structure of a permanent cable tensioning clamp of the present invention;
FIG. 5 is a schematic view of the structure of a temporary sling fork ear beam of the present invention;
FIG. 6 is a schematic view of the temporary rope clip of the present invention;
wherein: 1. a temporary cable clamp; 2. a temporary rope; 3. tensioning the anchor cup by the temporary sling; 4, temporarily stretching a sling tensioning screw; 5, temporarily suspending cable fork ear beams; 6, temporarily suspending the fork-shaped lug plate of the cable; 7. temporary sling pin shafts; 8, temporary sling tensioning supporting feet; 9 temporary sling tensioning jack; 10 temporary sling tensioning pull rod nuts; 11 permanent cable tension clamps; 12 permanent cable stretching supporting feet; 13 permanent cable tensioning core-through jack; 14, a counterforce beam; 15 permanent cable tension rods; 16 boxes Liang Erban; 17 permanent cords; 18 permanent cable clamps; 19 permanent cable pins.
Detailed Description
The invention will be further described with reference to the accompanying drawings.
As shown in fig. 1-6, the pin lug type double temporary rope self-balancing pulling type suspension bridge sling replacement underpinning device comprises a permanent rope clamp 18, wherein a box type Liang Erban is arranged below the permanent rope clamp 18, the top end of the permanent rope 17 is connected with the permanent rope clamp 18, and the bottom end of the permanent rope 17 is connected with the box type beam ear plate 16; the specific connection mode of the permanent rope 17 and the permanent rope clamp 18/the box Liang Erban is as follows: the two ends of the permanent rope 17 are respectively provided with a permanent sling fork-shaped lug plate, and the permanent sling fork-shaped lug plates are fixedly connected with the box-type beam lug plates 16 or the permanent rope clamps 18 through permanent rope pin shafts 19.
The middle lower part of the permanent rope 17 is symmetrically provided with a counter-force beam 14, the permanent rope 17 to be replaced is provided with a permanent rope tensioning rope clamp 11, both sides of the permanent rope tensioning rope clamp 11 are connected with a permanent rope tensioning pull rod 15 extending downwards, the bottom end of the permanent rope tensioning pull rod 15 passes through the counter-force beam 14 and then sequentially passes through a permanent rope tensioning supporting foot 12 and a permanent rope tensioning core-through jack 13 and then is screwed by nuts to be fixed;
the same ends of the two counterforce beams 14 are placed on the temporary sling tensioning anchor cup 3, temporary sling clamps 1 are arranged on two sides of the permanent sling clamp 18, a temporary sling 2 is arranged between the temporary sling clamp 1 and the temporary sling tensioning anchor cup 3 on the same side, the bottom end of a temporary sling tensioning screw 4 is connected with the temporary sling fork ear beam 5, the lower surface of the temporary sling fork ear beam 5 and the top end of the temporary sling 2 are both provided with temporary sling fork ear plates 6, and a temporary sling pin shaft 7 penetrates through holes in the temporary sling fork ear plates 6 to be fixed; the top end of the temporary sling tensioning screw 4 penetrates out of the temporary sling tensioning anchor cup 3 and then sequentially penetrates through the temporary sling tensioning support leg 8 and the temporary sling tensioning jack 9 to be fixed by the temporary sling tensioning pull rod nut 10.
Two through holes which are convenient for the temporary sling tensioning screws 4 to pass through are reserved on each temporary sling tensioning anchor cup 3, namely the number of the temporary sling tensioning screws 4 is 4.
Preferably, the PE sheath of the permanent rope 17 to be replaced is stripped off at the middle part of the permanent rope 17 to be replaced, and the permanent rope tensioning rope clamp 11 is clamped. Further preferably, the clamping position of the permanent cable stretching cable clamp 11 is 3-5 m away from the anchor cup of the permanent cable 17 to be replaced, and even further preferably 4-m.
The permanent cable tension cable clamp 11 is composed of a pair of clamping plates with the thickness of 2-3 cm, more preferably 2cm, the shape of the permanent cable tension cable clamp 11 is square, a first through hole for allowing the permanent cable 17 to be replaced to pass through and second through holes arranged on two sides of the first through hole for allowing the two permanent cable tension rods 15 to pass through are reserved in the middle of the permanent cable tension cable clamp 11, and a plurality of bolt fixing holes penetrating through the two clamping plates are formed in the side face of the permanent cable tension cable clamp 11. The bolts penetrate through the bolt fixing holes, the permanent cables 17 are clamped by tightening the bolts, and the length of the permanent cable tensioning cable clamp 11 is determined according to the design specification of the suspension bridge according to the pulling force.
The counterforce beam 14 is a steel box beam, and a hole which is convenient for the temporary sling tensioning screw 4 and the permanent cable tensioning rod 15 to pass through is reserved at the position of the counterforce beam 14 parallel to the permanent cable 17 at the anchor cup.
The reaction beam 14 is provided with a web plate and a transverse stiffening plate at the acting force position of the permanent cable tensioning core-penetrating jack 13 so as to enhance local stability.
The device of the embodiment fully utilizes the existing pair of lug plates of the moistening and raising bridge to reserve pin shaft holes, and a pair of temporary ropes 2 are respectively arranged at the left side and the right side of the permanent rope clamp 18. One end of the temporary rope 2 adopts a pin lug type, the other end adopts a stretching and cooling casting type temporary sling stretching anchor cup 3, two holes are reserved on two sides of the temporary sling stretching anchor cup 3, and a temporary sling stretching screw 4 can conveniently penetrate through the holes. On the upper side of the temporary sling tensioning anchor cup 3, a counter-force beam 14, temporary sling tensioning feet 8, a temporary sling tensioning jack 9 and a temporary sling tensioning draw bar nut 10 are placed.
The underpinning device related to the embodiment comprises a temporary rope clamp 1, a temporary sling fork lug 6, a temporary rope 2, a temporary sling tensioning anchor cup 3, a temporary sling tensioning screw 4, temporary sling tensioning supporting feet 8, a temporary sling tensioning jack 9, a temporary sling tensioning pull rod nut 10, a temporary sling fork lug beam 5, a permanent rope tensioning pull rod 15, a permanent rope tensioning rope clamp 11, a permanent rope tensioning core-penetrating jack 13, a permanent rope tensioning supporting foot 12, a permanent rope tensioning pull rod nut, a counterforce beam 14 and the like. The underpinning device is mainly technically characterized in that:
1. the upper end of the temporary rope 2 of the underpinning device is connected with the temporary rope clamp 1 by adopting a pin shaft type, and the temporary rope clamp 1 adopts the same form as the permanent rope clamp 18.
2. The lower end of the temporary rope 2 of the underpinning device is provided with a temporary sling tensioning anchor cup 3, and holes are reserved on two sides of the temporary sling tensioning anchor cup 3, so that a temporary sling tensioning screw 4 can conveniently penetrate through the temporary sling tensioning anchor cup. The lower end of the temporary sling tensioning screw 4 is connected with a fork lug. The temporary sling tensioning jack 9 pushes and pulls the temporary sling tensioning screw 4 to apply a cable force to the temporary cable 2. The temporary rope 2 has the function of unloading the permanent rope 17 and has the function of safety protection in the construction process of replacing the sling.
3. The underpinning device comprises a self-balancing system consisting of the existing steel box girder, a steel box girder lug plate 16, a permanent cable pin shaft 19, a temporary sling pin shaft 7, a temporary sling fork lug beam 5, a temporary sling tensioning screw 5, a temporary sling tensioning pull rod nut 10 and a counter-force beam 14, and is used for replacing the permanent cable 17.
4. At a position 4m away from the anchor cup of the permanent rope 17 to be replaced, the PE sheath of the permanent rope 17 to be replaced is stripped, a permanent rope tensioning rope clamp 11, a permanent rope tensioning pull rod 15, a permanent rope tensioning supporting foot 12, a permanent rope tensioning core-penetrating jack 13 and the like are installed.
5. When the permanent cable tensioning core-through jack 13 works, the transmission process of the base force of the permanent cable tensioning core-through jack 13 is as follows: the permanent cable tensioning core-penetrating jack 13, the counter-force beam 14, the temporary sling tensioning pull rod nut 10, the temporary sling tensioning screw 4, the temporary sling fork ear beam 5, the temporary sling pin shaft 7 and the box-type beam ear plate 16. At the other end of the permanent cable tension punching jack 13, the force transmission mode of the permanent cable tension punching jack 13 is as follows: the permanent cable tensioning core-penetrating jack 13, a nut of a permanent cable tensioning pull rod, a permanent cable tensioning pull rod 15, a permanent cable tensioning cable clamp 11 and a permanent cable 17 to be replaced. The underpinning device of the embodiment combines the temporary rope system with the unloading function and the counterforce beam system with the permanent rope replacement into a whole, so that the system has double functions.
6. When the permanent rope 17 is replaced, the temporary rope 2 only plays a role in slightly unloading and protecting safety of the permanent rope 17 to be replaced, and the permanent rope tensioning jack 13 transfers the rope force born by the original pin shaft to the permanent rope tensioning pull rod 15 to bear, so that the rope force of the permanent rope 17 is not increased or reduced. Therefore, the sling replacing mode is adopted, the sling construction has small influence on the internal force and the linear shape of the main cable, the main girder and the sling, and the surrounding cable force.
7. Because the sling replacement method reduces the interference change of the original structure to the minimum, the construction is safe and convenient when the sling is replaced.
8. Compared with the scheme that a sling at one suspension point is replaced by three suspension points or five suspension points, the sling replacing scheme only needs to be arranged at the position of the sling to be replaced, reduces construction work surfaces and construction temporary facilities, and solves the problems of complex construction, long construction period and the like.
The construction process of this embodiment is as follows:
step 1: preparation before construction
According to the size diagram of the sling 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 rope installation
Installing a temporary rope clamp 1, a temporary rope 2, a temporary sling tensioning anchor cup 3, a temporary sling fork ear beam 5, a temporary sling tensioning screw 4, a counter-force beam 14, temporary sling tensioning support feet 8, a temporary sling tensioning jack 9 and a temporary sling tensioning pull rod nut 10, and tensioning the temporary rope 2 to a target rope force to transfer part of the rope force of an old permanent rope 17 to the temporary rope 2;
step 3: permanent cable tension clamp and replacement underpinning device installation
The permanent cable tension cable clamp 11 of the permanent cable 17 to be replaced, the permanent cable tension pull rod 15, the permanent cable tension supporting leg 12 and the permanent cable tension core-through jack 13 are installed, and are screwed by nuts.
Step 4: removal of the permanent cable to be replaced
Pushing the counter-force beam 14 by using the permanent cable tensioning through jack 13, pulling the permanent cable tensioning pull rod 15, tensioning the permanent cable 17 to be replaced, transferring the cable force of the old permanent cable 17 to the permanent cable tensioning pull rod 15, enabling the permanent cable pin 19 to be in a stress-free state, dismantling the permanent cable pin 19, slowly unloading the permanent cable tensioning through jack 13, dismantling the permanent cable tensioning cable clamp 11 and the permanent cable tensioning pull rod 15, and dismantling the old permanent cable 17; then the pin shaft at the upper end of the old permanent rope 17 is removed by a winch, and the old rope is slowly placed on the bridge deck.
Step 5: new cable installation
The new permanent rope 17 is pulled by a winch to be provided with an upper end pin shaft, then a permanent rope tensioning rope clamp 11 and a permanent rope tensioning pull rod 15 for tensioning the new rope are provided, a permanent rope tensioning jack 13 is used for pushing a counter-force beam 14 and the permanent rope tensioning pull rod 15 of the new rope, the new rope is tensioned, a fork-shaped lug pin shaft hole of the new rope is concentric with a reserved hole of a box Liang Erban, a permanent rope pin shaft 19 is provided, and the permanent rope tensioning rope clamp 11 and the permanent rope tensioning pull rod 15 are 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 ropes
Removing the sling replacement underpinning device: the temporary rope 2, the temporary sling tensioning anchor cup 3, the temporary sling tensioning screw 4, the temporary rope clamp 1, the temporary sling fork ear beam 5 and the like, the cable force of the temporary rope 2 is transferred to a pair of new permanent ropes 17, the cable force of the sling is redistributed, and the sling is replaced.
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 (8)
1. Pin lug type double temporary rope self-balancing dragging type suspension bridge sling replacement underpinning device is characterized in that: the cable comprises a permanent cable clamp (18), wherein a box type Liang Erban (16) is arranged below the permanent cable clamp (18), the top end of a permanent cable (17) is connected with the permanent cable clamp (18), and the bottom end of the permanent cable (17) is connected with the box type Liang Erban (16);
the two sides of the middle lower part of the permanent cable (17) are symmetrically provided with counter-force beams (14), the permanent cable (17) to be replaced is provided with a permanent cable tensioning cable clamp (11), two sides of the permanent cable tensioning cable clamp (11) are connected with permanent cable tensioning pull rods (15) which extend downwards, and the bottom ends of the permanent cable tensioning pull rods (15) pass through the counter-force beams (14) and then sequentially pass through permanent cable tensioning support legs (12) and a permanent cable tensioning center-penetrating jack (13) to be fixed;
the same ends of the two counterforce beams (14) are placed on the temporary sling tensioning anchor cup (3), temporary sling clamps (1) are arranged on two sides of the permanent sling clamps (18), a temporary cable (2) is arranged between the temporary sling clamps (1) and the temporary sling tensioning anchor cup (3) on the same side, the bottom ends of the temporary sling tensioning screws (4) are connected with the temporary sling fork ear beams (5), temporary sling fork ear plates (6) are arranged on the lower surface of the temporary sling fork ear beams (5) and the top ends of the temporary sling (2), and temporary sling pin shafts (7) penetrate through holes in the temporary sling fork ear plates (6) and are fixed on the box type Liang Erban (16); the top end of the temporary sling tensioning screw rod (4) penetrates through the temporary sling tensioning anchor cup (3) and then sequentially penetrates through the counter-force beam (14), the temporary sling tensioning support leg (8) and the temporary sling tensioning jack (9) to be fixed by the temporary sling tensioning pull rod nut (10).
2. The pin lug type double temporary rope self-balancing pulling type suspension bridge sling replacement underpinning device according to claim 1, wherein: the two ends of the permanent rope (17) are provided with permanent sling fork-shaped lug plates, and the permanent sling fork-shaped lug plates are fixedly connected with the box Liang Erban (16) or the permanent rope clamps (18) through permanent rope pin shafts (19).
3. The pin lug type double temporary rope self-balancing pulling type suspension bridge sling replacement underpinning device according to claim 1, wherein: two through holes which are convenient for the temporary sling tensioning screws (4) to pass through are reserved on each temporary sling tensioning anchor cup (3), namely the number of the temporary sling tensioning screws (4) is 4.
4. The pin lug type double temporary rope self-balancing pulling type suspension bridge sling replacement underpinning device according to claim 1, wherein: and stripping the PE sheath of the permanent cable (17) to be replaced at the middle part of the permanent cable (17) to be replaced, and clamping the permanent cable tensioning cable clamp (11).
5. The pin lug type double temporary rope self-balancing pulling type suspension bridge sling replacement underpinning device according to claim 4, wherein: the clamping part of the permanent cable tensioning cable clamp (11) is 3-5 m away from the anchor cup of the permanent cable (17) to be replaced.
6. The pin lug type double temporary rope self-balancing pulling type suspension bridge sling replacement underpinning device according to claim 1, wherein: the permanent cable tension cable clamp (11) consists of a pair of clamping plates with the thickness of 2-3 cm, the permanent cable tension cable clamp (11) is square, a first through hole for allowing the permanent cable (17) to pass through to be replaced and a second through hole for allowing two permanent cable tension rods (15) to pass through are reserved in the middle of the permanent cable tension cable clamp (11), and a plurality of bolt fixing holes penetrating through the two clamping plates are formed in the side face of the permanent cable tension cable clamp (11).
7. The pin lug type double temporary rope self-balancing pulling type suspension bridge sling replacement underpinning device according to claim 1, wherein: the counterforce beam (14) is a steel box beam, and holes which are convenient for the temporary sling tensioning screw (4) and the permanent cable tensioning pull rod (15) to pass through are reserved at the positions of the counterforce beam (14) parallel to the permanent cables (17) at the anchor cup.
8. The pin lug type double temporary rope self-balancing pulling type suspension bridge sling replacement underpinning device according to claim 1 or 7, wherein: the reaction beam (14) is provided with a web plate and a transverse stiffening plate at the position acted by the permanent cable stretching through jack (13).
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| CN201811500360.2A CN109537476B (en) | 2018-12-10 | 2018-12-10 | Pin lug type double-temporary-rope self-balancing pulling type suspension bridge sling replacement underpinning device |
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| CN201811500360.2A CN109537476B (en) | 2018-12-10 | 2018-12-10 | Pin lug type double-temporary-rope self-balancing pulling type suspension bridge sling replacement underpinning device |
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| CN109537476B true CN109537476B (en) | 2024-02-23 |
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| CN113322834B (en) * | 2021-04-15 | 2022-11-25 | 江苏法尔胜缆索有限公司 | Method for replacing sling of suspension bridge through single-lifting-point tensioning |
| 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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