CN111305033A - Connecting structure, fixing structure, new main cable system and construction method for replacing main cable of suspension bridge - Google Patents
Connecting structure, fixing structure, new main cable system and construction method for replacing main cable of suspension bridge Download PDFInfo
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- CN111305033A CN111305033A CN201911159414.8A CN201911159414A CN111305033A CN 111305033 A CN111305033 A CN 111305033A CN 201911159414 A CN201911159414 A CN 201911159414A CN 111305033 A CN111305033 A CN 111305033A
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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
- E01D11/00—Suspension or cable-stayed bridges
- E01D11/02—Suspension 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
- E01D19/14—Towers; Anchors ; Connection of cables to bridge parts; Saddle supports
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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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- 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
Abstract
The invention discloses a connecting structure for replacing a main cable of a suspension bridge, which comprises an anchor connecting structure, a cable saddle connecting structure and a sling connecting structure; the anchorage connecting structure comprises a cable strand connecting plate, a prestressed anchorage device cable penetrating duct penetrating through the upper end surface and the lower end surface of the cable strand connecting plate, an original pull rod hole and an anchor hole; the cable saddle connecting structure comprises a base and a new saddle body positioned above the base; the sling connecting structure comprises a new cable clamp buckled on a new main cable, an upper shoulder pole beam arranged at the lower end of the new cable clamp, and a lower shoulder pole beam connected with the upper shoulder pole beam through a tension rod. The invention discloses a connecting structure, a fixing structure, a new main cable system and a construction method for replacing a main cable of a suspension bridge, wherein the traffic of the bridge is not influenced in the construction process; under the condition of ensuring the structure safety of a suspension bridge cable system, the defect that a main cable of a traditional suspension bridge is difficult to replace is solved.
Description
Technical Field
The invention relates to a main cable connecting structure of a suspension bridge, in particular to a connecting structure, a fixing structure, a new main cable system and a construction method for replacing a main cable of the suspension bridge.
Background
At present, diseases such as corrosion, broken wires and the like appear in a main cable structure of a suspension bridge, and the diseases of the suspension bridge will appear successively along with the increase of service life. The main cable is a life line of the suspension bridge, is the most important stressed component in the suspension bridge and bears all static loads and dynamic loads of the full-bridge superstructure. In order to ensure the safety of the bridge, the technical research of replacing the main cable is urgent. At present, the traffic needs to be stopped when the main cable is replaced, parts are replaced one by one, and in the whole replacement process, the problems that the deformation risk of a stiffening beam structure is large, the conversion difficulty of a new main cable system and an old main cable system is high, the structural design of a new main cable saddle and a scattered cable saddle is difficult, the anchoring conversion of a main cable strand at an anchoring position is difficult, and the like exist. Therefore, a structure and an implementation method for replacing a main cable of a suspension bridge are needed to solve the problem of replacement of the main cable structure of the suspension bridge.
Disclosure of Invention
Aiming at the problems, the invention provides a connecting structure, a fixing structure, a new main cable system and a construction method for replacing a main cable of a suspension bridge, aiming at solving the problems that in the construction of replacing the main cable, how to improve the anchor structure for anchoring the new main cable on the basis of the original structure, how to improve the sling structure of the new main cable on the basis of the original sling structure and how to improve the saddle structure of the new main cable on the basis of the original saddle structure; how to change main cable, hoist cable and improve the anchorage structure under the condition that does not influence the traffic.
The invention adopts the following technical scheme to realize the purpose:
a connecting structure for replacing a main cable of a suspension bridge comprises an anchor connecting structure, a cable saddle connecting structure and a sling connecting structure;
the anchor connecting structure comprises a cable strand connecting plate for replacing an original cable strand connecting plate; the cable strand connecting plate is provided with a pre-stressed anchor cable penetrating duct, an original pull rod hole and an anchor hole which penetrate through the upper end surface and the lower end surface of the cable strand connecting plate; the pre-stressed anchor device cable penetrating duct is positioned in the middle of the cable strand connecting plate and is clamped with the anchor head of the pre-stressed anchor device; the anchor holes are positioned at two ends of the strand connecting plate and used for connecting a new main cable strand anchoring structure; the position of the original pull rod hole corresponds to the pull rod hole on the original cable strand connecting plate;
the cable saddle connecting structure comprises a base and a new saddle body positioned above the base; one of the top surface of the base or the bottom surface of the new saddle body is provided with a groove structure along the saddle groove direction of the new saddle body, the other one of the top surface of the base or the bottom surface of the new saddle body is provided with a bulge structure matched with the groove structure, and the new saddle body and the base move relatively along the groove structure direction under the action of external force;
the sling connecting structure comprises a new cable clamp buckled on a new main cable, an upper shoulder pole beam arranged at the lower end of the new cable clamp, and a lower shoulder pole beam connected with the upper shoulder pole beam through a tension rod; one end of the tension rod is anchored on one of the upper shoulder pole beam or the lower shoulder pole beam, and the other end of the tension rod penetrates through the other of the upper shoulder pole beam or the lower shoulder pole beam and is provided with a tension device; the lower shoulder pole beam is arranged on an anchorage device at the upper end of the sling;
a connecting structure for replacing a main cable of a suspension bridge comprises an anchor connecting structure, a cable saddle connecting structure and a sling connecting structure;
the anchor connecting structure comprises a cable strand connecting plate; the cable strand connecting plate is provided with a prestressed anchorage cable penetrating pore passage, an original pull rod hole and an anchor hole which penetrate through the upper end surface and the lower end surface of the cable strand connecting plate; the pre-stressed anchor device cable penetrating duct is positioned in the middle of the cable strand connecting plate and is clamped to the anchor head of the pre-stressed anchor device; the anchor holes are positioned at two ends of the strand connecting plate and used for connecting a new main cable strand anchoring structure; the position of the original pull rod hole corresponds to the pull rod hole on the original cable strand connecting plate;
the cable saddle connecting structure comprises a base and a new saddle body positioned above the base; one of the top surface of the base or the bottom surface of the new saddle body is provided with a groove structure along the saddle groove direction of the new saddle body, the other one of the top surface of the base or the bottom surface of the new saddle body is provided with a bulge structure matched with the groove structure, and the new saddle body and the base move relatively along the groove structure direction under the action of external force;
the sling connecting structure comprises a conversion cable clamp buckled on a new main cable and a sling cable force conversion device; the sling cable force conversion device comprises a tensioning device, a tensioning rod, a cable force conversion inhaul cable, a connecting pull rod and a support flat plate positioned between the original main cable and a beam end ear plate; one end of the cable force conversion cable is connected with one end of the support flat plate through a first connecting pull rod and a first connecting pull rod nut, and the other end of the cable force conversion cable spans across the conversion cable clamp and is connected with the other end of the support flat plate through a second connecting pull rod and a second connecting pull rod nut; the tensioning rod penetrates through the support flat plate and the tensioning device, one end of the tensioning rod is connected with the beam end ear plate, and the other end of the tensioning rod is provided with a tensioning nut; the tensioning device is positioned between the tensioning nut and the support flat plate;
the further technical scheme is that the cable saddle connecting structure further comprises a sliding device, and the sliding device is fixedly connected into the groove structure.
The further technical scheme is that the cable saddle connecting structure further comprises a sliding device, and the sliding device is located between the groove structure and the protruding structure.
The further technical scheme is that the cable saddle connecting structure is used for a main cable saddle and a scattered cable saddle.
The technical scheme is that the lower end of the new cable clamp is connected with a fork lug through a pin shaft, the fork lug is provided with a counter-force step, and the upper shoulder pole beam is of a Harvard structure and is clamped with the upper end face of the counter-force step.
The further technical proposal is that the lower shoulder pole beam is of a Harvard structure and is matched with the end surface of an anchor cup of an anchorage device at the upper end of the sling.
The further technical scheme is that the tensioning device comprises a supporting foot, a jack and a tensioning nut which are sequentially sleeved at the end part of the tensioning rod, and the tensioning nut is connected with the tensioning rod through threads.
The further technical scheme is that the tensioning device comprises a supporting foot and a jack which are sequentially sleeved on the tensioning rod, one end of the supporting foot is propped against the supporting flat plate, the other end of the supporting foot is propped against one end of the jack, and the other end of the jack is propped against the tensioning nut.
A fixing structure for replacing a main cable of a suspension bridge comprises the connecting structure, and the fixing structure comprises an anchorage structure, a cable saddle structure and a sling structure, wherein the anchorage structure comprises a first pull rod penetrating through an original pull rod hole, an original cable strand anchor head connected with one end of the first pull rod, a first locking nut connected with the other end of the first pull rod and a new main cable strand anchoring structure connected with the anchor hole; the cable saddle structure comprises an original cable saddle, and the base is positioned at the top of the original cable saddle and connected with the original cable saddle; the sling structure comprises a lower pull rod, an adjusting sleeve and an upper pull rod which are sequentially connected between the sling and a new cable clamp, wherein two ends of the adjusting sleeve are respectively connected with the upper pull rod and the lower pull rod through a first thread and a second thread, and the directions of the first thread and the second thread are opposite.
A fixing structure for replacing a main cable of a suspension bridge comprises the connecting structure, and comprises an anchorage structure, a cable saddle structure and a sling structure, wherein the anchorage structure comprises a first pull rod penetrating through an original pull rod hole, an original cable strand anchor head connected with one end of the first pull rod, a first locking nut connected with the other end of the first pull rod, and a new main cable strand anchoring structure connected with the anchor hole; the cable saddle structure comprises an original cable saddle, and the base is positioned at the top of the original cable saddle and connected with the original cable saddle; the sling structure comprises a new cable clamp buckled on a new main cable, a beam end ear plate connected with the beam end and a steel wire rope stay cable, wherein the steel wire rope stay cable rides over the new cable clamp, and two ends of the steel wire rope stay cable are respectively connected with the beam end ear plate.
The new main cable strand anchoring structure comprises a second pull rod penetrating through an anchor hole, a new strand anchor head connected with the top end of the second pull rod, and a second locking nut connected with the bottom end of the second pull rod, wherein the second pull rod is provided with a thread matched with the second locking nut; the new cable strand anchor head is used for anchoring a new main cable strand; and the second locking nut is clamped at the bottom end of the anchor hole.
The bottom surface of the base is of an arc-shaped structure and is matched with the top of the original cable saddle; the base is provided with a boss which is embedded into a saddle groove of the original cable saddle.
The further technical scheme is that the original cable saddle and the boss are provided with corresponding original cable saddle pull rod holes and base pull rod holes, and the base is connected with the original cable saddle through a pull rod.
A new main cable system for replacing a main cable of a suspension bridge comprises a new main cable provided with the connecting structure.
A construction method for replacing a main cable of a suspension bridge comprises a fixing structure for replacing the main cable of the suspension bridge, and comprises the following steps:
A) the installation of the cable saddle connecting structure comprises a main cable saddle connecting structure and a cable saddle scattering connecting structure;
B) installing an anchorage connecting structure;
C) the erection of the main cable comprises the traction of a main cable strand, the anchoring of the main cable strand at an anchorage and the saddle-entering of the main cable strand at a main cable saddle and a cable-scattering saddle;
D) tightening the main cable, making the erected cable strand group into a round shape, and achieving the specified void ratio;
E) mounting a sling connecting structure;
F) the new and old cable system is converted, the original main cable clamp and the sling are removed through the sling connecting structure, and the original main cable is removed after the force conversion of the full-bridge new sling and the original sling is completed; and installing a sling structure, performing cable force conversion between the new sling and the cable force conversion device, and removing the sling cable force conversion device after the cable force conversion is completed.
The further technical scheme is that the step B also comprises the following steps:
B1) measuring the cable force of the original main cable strand on the original cable strand connecting plate;
B2) disassembling the original main cable strand, the original pull rod and the components thereof;
B3) disassembling an anchor head and a component of the prestressed anchorage device, and disassembling an original cable strand connecting plate;
B4) installing a strand connecting plate, penetrating an anchor rope of the pre-stressed anchor through a pre-stressed anchor rope penetrating channel, installing an anchor head of the pre-stressed anchor on the upper end face of the pre-stressed anchor rope penetrating channel, and adjusting and re-tensioning the pre-stressed anchor to a designed rope force;
B5) connecting the first pull rod to an original anchor head, installing an original main cable strand to the original anchor head, and tensioning and adjusting the cable force to the original cable force;
B6) installing a new main cable strand anchoring structure and connecting the new main cable strand anchoring structure with a new strand connecting plate through an anchor hole;
the further technical scheme is that the step F further comprises the following steps:
F1) disassembling the old cable clamp, tensioning the sling through a tensioning device, removing the tension between the old cable clamp and the sling, and disassembling the old cable clamp on the old main cable;
F2) tensioning the sling, and locking when the sling meets the requirement of the cable force;
F3) disassembling the old main cable, and disassembling the old main cable after the sling of the full bridge is tensioned;
F4) lengthening a sling, and sequentially installing a lower pull rod, an adjusting sleeve and an upper pull rod on the sling;
F5) tensioning the lengthened suspension cable until the requirement of cable force is met;
F6) and (5) dismantling the cable force conversion device.
The working principle of the invention is as follows:
the middle section of a main cable of the conventional suspension bridge is connected with a beam end through a sling structure, two ends of the main cable respectively pass through a main cable saddle at the top of the tower and then respectively pass through a cable scattering saddle, the cable scattering saddle changes the force transmission direction of the main cable and disperses the main cable into a plurality of cable strands, and the cable strands are respectively anchored on anchor structures corresponding to the cable strands. The main cable of the suspension bridge is replaced by adopting the connecting structure and the fixing structure, in the first step, a new main cable is erected above the original main cable (namely the original main cable), the two ends of the new main cable are respectively connected with the original anchor structure through the anchor connecting structure, in the installation process of the anchor connecting structure, the anchor connecting structure is installed on the basis that the original anchor structure continuously works, the anchor system of the suspension bridge consists of a plurality of anchor structures, and the original anchor structures are improved one by one in the installation process, so that the integral use function of the anchor system of the suspension bridge and the integral stress condition of the original main cable are not influenced; secondly, improving the structures of the loose cable saddle and the main cable saddle on the basis of the original loose cable saddle and the original main cable saddle, wherein the original loose cable saddle and the original main cable saddle also keep the original functions and stress in the improvement and installation processes; thirdly, improving the original sling one by one on the basis of the structure of the original sling, transferring the cable force of the original sling acting on the original main cable to a new main cable, wherein the original main cable keeps the original function and stress in the process of transferring the cable force, and removing the original main cable and the components thereof after the transfer of the cable force is finished; the connecting structure and the fixing structure can replace the main cable and the required anchor structure, cable saddle structure, sling structure and the like without influencing the normal use of the original bridge (original main cable, original anchor system, original loose cable saddle, original main cable saddle and original sling).
The invention has the beneficial effects that:
according to the connecting structure, the fixing structure, the new main cable system and the construction method for replacing the main cable of the suspension bridge, provided by the invention, the anchorage system, the cable saddle system and the sling system are replaced one by one, and construction is carried out under the condition that the original main cable is continuously stressed, so that the bridge traffic is not influenced in the construction process; under the condition of ensuring the safety of the cable system structure of the suspension bridge, the defect that the main cable of the traditional suspension bridge is difficult to replace is solved; the method for replacing the main cable is safe and reliable, the construction is simple and feasible, and the whole structure of the bridge is stable, durable, safe and reliable during and after the main cable is replaced.
Drawings
FIG. 1 is a diagram: the invention discloses an anchoring structure schematic diagram of a fixing structure for replacing a main cable of a suspension bridge.
FIG. 2 is a diagram of: the invention relates to a three-dimensional view of an anchoring structure of a fixing structure for replacing a main cable of a suspension bridge.
FIG. 3 is a diagram of: the invention discloses a schematic view of a strand connecting plate of a fixing structure for replacing a main cable of a suspension bridge.
FIG. 4 is a diagram of: the invention discloses a schematic diagram of a sling structure of a fixing structure for replacing a main cable of a suspension bridge.
FIG. 5 is a diagram: the invention discloses a schematic diagram of a new sling structure for replacing a main cable of a suspension bridge.
FIG. 6 is a diagram of: the invention discloses a schematic structural diagram of a main cable saddle for replacing a main cable of a suspension bridge.
FIG. 7 is a diagram of: the invention discloses a main cable saddle sectional view for replacing a main cable of a suspension bridge.
FIG. 8 is a diagram of: the invention discloses a structural schematic diagram of a new saddle body and a new base of a main cable saddle for replacing a main cable of a suspension bridge.
FIG. 9 is a diagram of: the invention relates to a novel saddle body and base section view of a main cable saddle for replacing a main cable of a suspension bridge.
FIG. 10 is a diagram: the invention discloses a schematic structural diagram of a cable scattering saddle for replacing a main cable of a suspension bridge.
FIG. 11 is a diagram of: the invention discloses a cable-scattering saddle sectional view for replacing a main cable of a suspension bridge.
FIG. 12 is a diagram: the invention discloses a structural schematic diagram of a new saddle body and a new base of a cable-scattering saddle for replacing a main cable of a suspension bridge.
FIG. 13 is a graph of: the invention relates to a novel saddle body and base sectional view of a cable-scattering saddle for replacing a main cable of a suspension bridge.
FIG. 14 is a graph of: the invention discloses a schematic diagram of a sling conversion structure of a fixing structure for replacing a main cable of a suspension bridge.
FIG. 15 is a schematic diagram of: the invention discloses a schematic diagram of a new steel wire rope sling structure for replacing a main rope of a suspension bridge.
FIG. 16 is a graph showing: the invention discloses a structural schematic diagram of an original cable strand connecting plate of a suspension bridge.
FIG. 17 is a graph of: the invention discloses a schematic diagram of a nut anchor cup pressure-bearing type sling structure to be converted.
In the figure:
12. a cable strand connecting plate; 1101. an original cable strand anchor head; 111. original cable strand connecting cylinders; 1111. a first protrusion; 112. protecting covers of original anchor heads; 115. an anchor head of the pre-stressed anchor; 1201. a new strand anchor head; 1210. mounting holes; 1220. an anchor eye; 1230. an original pull rod hole; 131. a first pull rod; 1310. a first lock nut; 141. a second pull rod; 1410. a second lock nut; 21. a fork ear; 22. a pin shaft; 211. a high-strength bolt; 212. stretching a pull rod; 213. a lower shoulder pole beam; 214. a brace; 215. A jack; 216. tensioning the nut; 217. a new cable clamp; 218. a new main cable; 219. original cable clips; 220. the original main cable; 209. A draw rod nut; 210. an upper shoulder pole beam; 2101. a counter-force step; 221. a cable clamp is converted; 222. a cable force conversion inhaul cable; 223. connecting a pull rod; 224. supporting the flat plate; 225. a wire rope cable; 23. an upper pull rod; 24. an adjustment sleeve; 25. a lower link; 26. a sling; 261. an anchor cup of an upper anchor; 27. a lower end fork ear; 271. a lower anchor head; 28. a lower end pin shaft; 281. a pressure-bearing nut; 31. original cable saddle; 311. a pull rod hole of an original cable saddle; 32. a base; 321. a groove; 322. a boss; 323. a base draw bar hole; 33. a new saddle body; 330. a new saddle body saddle groove; 331. a protrusion; 34. a sliding device; 35. a pull rod.
Detailed Description
The present invention will be described in detail with reference to fig. 1 to 17 and the embodiments, and features in the following embodiments and examples may be combined with each other without conflict.
The embodiment provides a connecting structure for replacing a main cable of a suspension bridge, which comprises an anchor connecting structure, a cable saddle connecting structure (a main cable saddle connecting structure and a cable saddle scattering connecting structure) and a sling connecting structure (a cable clamp and sling connecting structure); the connection structure of the embodiment is used in the construction of a suspension bridge for replacing a main cable, a new main cable 218 is positioned above an original main cable 220, two ends of the new main cable 218 are connected with an anchor connection structure, and the middle section of the new main cable passes through a cable saddle scattering structure, passes through a main cable saddle structure at the top of a tower and is tensioned through a suspension cable connection structure; the lower end of the sling 26 is connected with the beam end through a lower end fork lug 27 and a lower end pin shaft 28, and the upper end is connected with the old cable clamp 219 through an upper end fork lug and an upper end pin shaft; as shown in fig. 16, the anchor connection structure to be replaced in this embodiment includes an original strand connection plate 11, a prestressed anchor located at the lower end of the original strand connection plate, a first pull rod 131 located at the upper end of the original strand connection plate, and an original strand anchor head 1101, the upper end surface of the original strand connection plate 11 is clamped to the anchor head 115 of the prestressed anchor, the prestressed anchor gives a downward pulling force to the original strand connection plate 11, the lower end of the first pull rod 131 penetrates through a pull rod hole in the original strand connection plate 11 and is connected to a nut, the nut is clamped to the lower end surface of the pull rod hole, the upper end of the first pull rod 131 is connected to the original strand anchor head 1101, the original strand anchor head 1101 is connected to an old main cable, the first pull rod 131 gives an upward pulling force to the original strand connection plate 11, and therefore the original strand connection plate 11 is in a balanced state in a use process; in practical engineering, an anchor head protective cover 112 may be installed on the periphery of an anchor head 115 of the prestressed anchorage device, and connected to the original strand connecting plate 11 through a screw, and an original strand connecting cylinder 111 may be installed at the lower end of the original strand connecting plate 11 and connected to the original strand connecting plate 11 through a screw.
As shown in fig. 1 to 3, the anchor connecting structure includes a cable strand connecting plate 12 and an original cable strand connecting cylinder 111; the cable strand connecting plate 12 is provided with a pre-stressed anchor cable penetrating duct 1210, an original pull rod hole 1230 and an anchor hole 1220 which penetrate through the upper end surface and the lower end surface of the cable strand connecting plate; the prestressed anchorage device cable penetrating channel 1210 is located in the middle of a cable strand connecting plate 12 and is clamped to an anchor head 15 of the prestressed anchorage device, the position of an original pull rod hole 1230 corresponds to a pull rod hole in the original cable strand connecting plate, anchor holes 1220 are located at two ends of the cable strand connecting plate 12 and are used for connecting a new main cable strand anchoring structure, and the angle of the anchor holes 1220 is determined according to the installation position and the tension force of a new main cable, and is not limited herein;
the anchor structure adopting the cable strand connecting structure in the embodiment further comprises a first pull rod 131 penetrating through the original pull rod hole 1230, an original cable strand anchor head 1101 connected with one end of the first pull rod 131, and a first locking nut 1310 connected with the other end of the first pull rod 131, wherein the first pull rod 131 can be determined according to the use degree of the original pull rod, and the original pull rod or a new pull rod can be selected; the new main cable strand anchoring structure connected with the anchor hole 1220 is specifically a second pull rod 141 penetrating through the anchor hole 1220, a new cable strand anchor head 1201 connected with the top end of the second pull rod 141, and a second locking nut 1410 connected with the bottom end of the second pull rod 141, and the second pull rod 141 is provided with a thread matched with the second locking nut 1410; the new strand anchor head 1201 is used for anchoring a new main cable strand; the second locking nut 1410 is clamped at the bottom end of the anchor hole 1220;
an anchor rope of the prestressed anchorage device penetrates through a prestressed anchorage device cable penetrating hole channel 1210, an anchor head 115 of the prestressed anchorage device is arranged on the upper end face of the strand connecting plate 12, and the anchor head 115 of the prestressed anchorage device is clamped on the upper end face of the prestressed anchorage device cable penetrating hole channel 1210 (the outer diameter of the anchor head 115 of the prestressed anchorage device is larger than the prestressed anchorage device cable penetrating hole channel 1210); in the tensioning process, the strand connecting plate 12 is clamped to the anchor head 115 of the prestressed anchorage at the lower end of the strand connecting plate, and the strand connecting plate 12 tends to be balanced by the pulling force of the downward prestressed anchorage and the pulling force of the upward first pull rod 131, so that the strand connecting plate 12 keeps a fixed position in the tensioning process;
as shown in fig. 4 and 5, the sling connection structure includes a new cable clamp 217 fastened to a new main cable 218, an upper pole beam 210 installed at a lower end of the new cable clamp 217, and a lower pole beam 213 connected to the upper pole beam 210 by a tension rod 212; the lower end of the tensioning rod 212 penetrates through the lower shoulder-pole beam 213, and the lower end of the tensioning rod is provided with a tensioning device, wherein the tensioning device is specifically a supporting foot 214, a jack 215 and a tensioning nut 216 which are sequentially sleeved at the end part of the tensioning rod, one end of the supporting foot 214 abuts against the lower end face of the lower shoulder-pole beam 213, the other end of the supporting foot abuts against the jack 215, and the tensioning nut 216 is positioned outside the jack 215 and is connected with the tensioning rod 212 through threads; the upper end of the tension rod 212 is anchored on the upper shoulder pole beam 210, and the specific anchoring mode is that the upper end of the tension rod 212 penetrates through the upper shoulder pole beam 210 and is connected with a tension rod nut 209 through threads, and the tension rod nut 209 is clamped on the upper end face of the upper shoulder pole beam 210; the lower shoulder pole beam 213 is mounted on the end surface of the anchor cup 261 of the anchor at the upper end of the sling 26; the number of the tension rods 212 is more than two, and the tension rods are symmetrically distributed on the left side and the right side of the sling 26; the lower end of the new cable clamp 217 is connected with a fork lug 21 through a pin shaft 22, the fork lug 21 is provided with a reaction step 2101, the upper carrying pole beam 210 is of a Harvard structure and is locked through a high-strength bolt 211, a first through hole penetrating through the upper end surface and the lower end surface of the spliced upper carrying pole beam 210 is formed in the middle of the upper carrying pole beam 210, the inner diameter of the first through hole is smaller than the outer diameter of the reaction step 2101, and therefore the lower end surface of the upper carrying pole beam 210 is clamped on the upper end surface of the reaction step 2101; the lower shoulder pole beam 213 is in a Harvard structure and is locked by a high-strength bolt, the middle part of the spliced lower shoulder pole beam 213 is provided with a second through hole penetrating through the upper end surface and the lower end surface of the lower shoulder pole beam, and the inner diameter of the second through hole is smaller than the outer diameter of the end surface of the anchor cup 261 of the upper anchor, so that the upper end surface of the lower shoulder pole beam 213 is clamped on the end surface of the anchor cup 261 of the upper anchor; the distance between the upper carrying pole beam 210 and the lower carrying pole beam 213 is shortened by the tensioning of the tensioning device, and the tensioning device is locked by the tensioning nut 216, namely the tension between the sling 26 and the original main cable 220 is transferred to the new main cable 218;
the new sling structure adopting the sling connection structure is characterized in that a fork lug 21 and a sling 26 are sequentially connected through an upper pull rod 23, an adjusting sleeve 24 and a lower pull rod 25 (the fork lug 21 is connected with one end of the upper pull rod 23, the other end of the upper pull rod 23 is connected with one end of the adjusting sleeve 24, the other end of the adjusting sleeve 24 is connected with one end of the lower pull rod 25, the other end of the lower pull rod 25 is connected with the upper end of the sling 26), the two ends of the adjusting sleeve 24 are respectively connected with the upper pull rod 23 and the lower pull rod 25 through a first thread and a second thread, wherein the directions of the first thread and the second thread are opposite; the two ends of the adjusting sleeve 24 adopt reverse threads, so that the distance between the adjusting sleeve and the upper pull rod 23 and the lower railing 24 and the cable force of the sling 26 can be conveniently adjusted;
as shown in fig. 6 to 13, the saddle-attaching structure includes a base 32, a new saddle 33, a sliding device 34; the top surface of the base 32 is provided with a groove 321, the groove 321 is along the direction of the saddle groove 330 of the new saddle body, the sliding device 34 is fixedly arranged in the groove 321, the specific installation mode is that the groove 321 is fixed through bolts or rivets, the bottom surface of the new saddle body 33 is provided with a protrusion 331, in the installation process, the protrusion 331 is embedded into a matching structure of the groove 321 and used for installation and restriction of the new saddle body 33, the protrusion 331 is in contact with the sliding device 34 in the groove 321, the new saddle body 33 and the base 32 move relatively through the sliding device 34, the sliding device 34 is used for realizing pre-deflection and sliding of the new saddle body 33 in the tensioning process of the new main cable, and the sliding device 34 can be specifically a rolling sliding device and a friction sliding device, such as a roller, a bearing; the above-described saddle-attaching structure as shown in fig. 6 to 13 is used for the saddle-attaching structure and the main-cable-saddle attaching structure of the suspension bridge in the present embodiment, which are provided on the steel member supporting the main cables at the top of the cable tower, and serve to uniformly transmit the large pressure from the main cables to the cable tower and to ensure the smooth transition of the main cables at the top plate of the cable tower; the cable scattering saddle is used for gathering the cable scattering strands connected with the anchor structure into a cable body; the cable saddle structure adopting the cable saddle connecting structure further comprises an original cable saddle 31; the bottom surface of the base 32 is provided with a boss 322, the bottom surface of the base 32 is of an arc structure and has the same arc structure as the top of the original cable saddle 31, the boss 322 is embedded into a saddle groove of the original cable saddle 31, the boss 322 is provided with a base pull rod hole 323 at the corresponding position of the original cable saddle pull rod hole 311, and the base 32 and the original cable saddle 31 are fixedly connected through a pull rod 35;
the construction method for replacing the main cable by adopting the anchor structure, the sling structure and the cable saddle structure comprises the following specific steps:
A) the installation of the cable saddle connecting structure comprises a main cable saddle connecting structure and a scattered cable saddle connecting structure, and specifically, the base and a new saddle body can be hoisted above an original cable saddle and fixedly installed in a hoisting mode;
B) installing an anchor connecting structure, specifically, B1) measuring the cable force of an original main cable strand on an original cable strand connecting plate;
B2) detaching the original main cable strand (i.e. detaching the original anchor head together with the original main cable strand from the original pull rod), the original pull rod and components thereof, wherein the components comprise a first locking nut, a washer and the like; (ii) a
B3) Disassembling an anchor head and a component of the prestressed anchorage device, and disassembling an original cable strand connecting plate;
B4) installing a strand connecting plate, penetrating an anchor rope of the pre-stressed anchor through a pre-stressed anchor rope penetrating channel, installing an anchor head of the pre-stressed anchor on the upper end face of the pre-stressed anchor rope penetrating channel, and adjusting and re-tensioning the pre-stressed anchor to a designed rope force;
B5) connecting the first pull rod to the original anchor head (at the moment, one end of the original anchor head is connected with the first pull rod, and the other end of the original anchor head is connected with the original main cable strand), and tensioning and adjusting the cable force to be the same as the original cable force;
B6) installing a new main cable strand anchoring structure and connecting the new main cable strand anchoring structure with a new strand connecting plate through an anchor hole;
b6a) installing a second pull rod at the anchor hole;
B6B) installing a new cable strand anchor head at the top end of the second pull rod;
b6c) mounting a second lock nut at the bottom end of the second pull rod.
C) The erection of the main cable comprises the traction of a main cable strand, the anchoring of the main cable strand at an anchorage and the saddle-entering of the main cable strand at a main cable saddle and a cable-scattering saddle;
D) tightening the main cable, making the erected cable strand group into a round shape, and achieving the specified void ratio;
E) mounting a sling connecting structure;
F) the new and old cable system is converted, the original main cable clamp and the sling are removed through the sling connecting structure, and the original main cable is removed after the force conversion of the full-bridge new sling and the original sling is completed; installing a sling structure, performing cable force conversion between a new sling and a cable force conversion device, and removing the sling cable force conversion device after the cable force conversion is finished; in particular to a method for preparing a high-performance nano-silver alloy,
F1) disassembling the old cable clamp, tensioning the sling through a tensioning device, removing the tension between the old cable clamp and the sling, and disassembling the old cable clamp on the original main cable;
F2) tensioning the sling, and locking the tensioning device when the sling meets the requirement of the cable force;
F3) the original main cable is disassembled, and the original main cable is disassembled after the suspension cable of the full bridge is tensioned;
F4) lengthening a sling, and sequentially installing a lower pull rod, an adjusting sleeve and an upper pull rod on the sling;
F5) tensioning the lengthened suspension cable until the requirement of cable force is met;
F6) and (5) dismantling the cable force conversion device.
In the above embodiment, the following alternatives regarding the specific connection components and connection relationships in the anchor structure, the sling structure, and the cable saddle structure are provided:
in the anchorage structure:
the above embodiments exemplarily show the connection manner of the new strand anchor head and the new strand connecting plate, and according to other embodiments and practical applications, other strand anchor heads and connection relationships may be used instead, for example: the anchor head of the new strand is a pressure-bearing type anchor head of the strand, the anchor hole is opened towards one end close to the end part of the connecting plate 12 of the new strand, the pressure-bearing type anchor head of the strand is clamped at the bottom end of the anchor hole 1220, the pressure-bearing type anchor head of the strand is used for anchoring the new strand, and the new strand penetrates through the anchor hole 220 and is connected with the anchor head of the strand at the other end; for example, the new strand anchor head is a thread adjusting strand anchor head, the bottom end of the anchor hole 1220 is provided with a nut matched with the thread adjusting strand anchor head, the nut is clamped at the bottom end of the anchor hole 1220 and used for anchoring the new strand, the thread adjusting strand anchor head is used for anchoring the new strand, and the new strand penetrates through the anchor hole 1220 and is connected with the anchor head of the other strand.
In the cable saddle structure:
the above embodiment exemplarily shows the connection relationship between the base 32 and the original cable saddle 31, and according to other embodiments and practical applications, other connection relationships may be substituted, for example, the connection relationships are fixedly connected by welding, snapping, mortise and tenon, etc.; in the above embodiment, the shape of the bottom surface of the base 32 and the boss 322 are not essential features, and the base 32 can be fixedly connected to the original saddle 31 by welding or the like, and therefore, the shape of the boss 322 and the bottom surface is not limited.
The above embodiment exemplarily shows that the groove 321 is located on the top surface of the base 32, and according to other embodiments and practical applications, the groove may also be located on the bottom surface of the new saddle 33, the sliding device 34 is located in the groove, and is in contact with the base 32, and through relative movement between the sliding device 34 and the base 32, the sliding device 34 is used for realizing pre-deflection and sliding of the new saddle 33 during tensioning of the new main cable; in this embodiment, the top surface of the base 32 may also be provided with a protrusion that mates with the groove, and during installation, the protrusion is inserted into the mating structure of the groove for installation constraint of the new saddle 33, and the protrusion contacts the sliding device in the groove.
In the preferred embodiments shown in the above embodiments, the cable saddle connecting structure including the sliding device 34 is a preferred technical solution, and is for facilitating installation and main cable tensioning, and in other embodiments or practical applications, the sliding device 34 may not be needed between the base 32 and the new saddle body 33 under the condition that the deviation calculation is accurate, or a steel plate sliding pair may be installed between the groove structure and the protrusion structure, or the contact surface between the base 32 and the new saddle body 33 is relatively smooth, etc. instead of the sliding device 34, so the sliding device 34 is not an essential technical feature; in addition, in other embodiments or practical applications, the fixed connection between the sliding device 34 and the groove 321 is not an essential technical feature, and the sliding device 34 is movably disposed in the groove 321, and the groove 321 and the protrusion 331 respectively contact at both ends, so that the base 32 and the new saddle 33 can move relatively, and the pre-deflection and sliding of the new saddle 3 are provided during the tensioning of the new main cable.
In the sling structure:
the above embodiment exemplarily shows the connection relationship between the tension rod 212 and the upper and lower carrying pole beams 210 and 213; according to other embodiments and practical applications, other connection relationships may be used instead, for example, the lower end of the tension rod 212 penetrates through the lower carrying pole beam 213, the lower end of the tension rod 212 is sequentially sleeved with the supporting leg 214, the jack 215 and the tension nut 216, and the upper end of the tension rod 212 may be connected with the upper carrying pole beam 210 by means of integral molding, threaded connection, welding, or the like; or the upper end of the tension rod 212 penetrates through the upper shoulder pole beam 210, the upper end of the tension rod 212 is sequentially sleeved with the supporting feet 214, the jack 215 and the tension nut 216, and the lower end of the tension rod 212 can be connected with the lower shoulder pole beam 213 through the tension rod nut 209 in an integrated forming mode, a threaded connection mode, a welding mode and the like.
The above embodiment exemplarily shows the connection relationship between the new main cable 218 and the upper carrying pole beam 210, and according to other embodiments and practical applications, the connection relationship may be replaced by other connection relationships, for example, the lower end of the new cable clamp 217 is provided with a reaction step, and the upper carrying pole beam 210 with the haversian structure is matched with the reaction step, so that the fork ear 21 is convenient to install and construct in a preferred scheme, and is not a necessary technical feature; the new main cable 218 may also be directly connected to the upper pole beam 210 by welding, mortise and tenon, snap, anchoring, etc.
The above embodiment exemplarily shows the connection relationship between the lower shoulder pole beam 213 and the upper end anchorage of the sling 26, and according to other embodiments and practical applications, other connection relationships may be used instead, for example, the connection relationship is clamped on the end face of the fork ear of the upper end anchorage; in the sling implementation mode of the conical anchorage, the lower shoulder pole beam 213 is provided with a through hole penetrating through the upper end surface and the lower end surface of the lower shoulder pole beam, the aperture of the through hole is smaller than the maximum outer diameter of the conical anchorage, and the lower shoulder pole beam 213 is clamped on the conical anchorage at the upper end of the sling through the through hole; the haver type structure of the lower shoulder pole beam 213 is not an essential technical feature, and may be connected to an anchor at the upper end of the sling by welding, mortise and tenon joint, snap, anchoring, or the like.
The above embodiments exemplarily show specific sling wire connection structures, sling wire structures, which may also be replaced with other structures according to other embodiments and practical applications, such as: as shown in fig. 14 and 15, the sling attachment structure includes a conversion clip 221 fastened to the new main cable 218, a sling cable force conversion device; the sling cable force conversion device comprises a tensioning device, a tensioning rod 212, a cable force conversion cable 222, a connecting pull rod 223 and a support flat plate 224 positioned between the original main cable 218 and the beam end; one end of the cable force conversion cable 222 is connected with one end of the support flat plate 224 through a first connection pull rod and a first connection pull rod nut, and the other end crosses over the conversion cable clamp 221 and is connected with the other end of the support flat plate 224 through a second connection pull rod and a second connection pull rod nut; the tension rod 212 penetrates through the support flat plate 224 and the tensioning device, one end of the tension rod is connected with the beam end, and the other end of the tension rod is provided with a tensioning nut 216; the tensioning device is located between the tensioning nut 216 and the support plate 224; the tensioning device is specifically a supporting foot 214, a jack 215 and a tensioning nut 216 which are sequentially sleeved on the end part of the tensioning rod 212, one end of the supporting foot 214 is abutted against the upper end face of the supporting flat plate 224, the other end of the supporting foot is abutted against the jack 215, and the tensioning nut 216 is positioned outside the jack 215 and is connected with the tensioning rod 212 through threads; the sling structure adopting the sling connecting structure further comprises a new cable clamp 217 buckled on the new main cable 218, a beam end ear plate 20 and a steel wire rope stay 225, wherein the steel wire rope stay 225 strides over the new cable clamp 217, and two ends of the steel wire rope stay are respectively connected with the beam end ear plate 20.
The above embodiment exemplarily shows that the sling conversion device of the present invention is used for a sling structure connected to a beam end through the lower fork 27 and the lower pin 28, and according to other embodiments and practical applications, can also be used for a sling structure whose lower end is pressed by a nut anchor cup, as shown in fig. 17, a sling 26 is anchored to a beam end by using a lower anchor head 271 and a pressure nut 281, the lower anchor head 271 and the pressure nut 281 are in threaded connection at the lower part of the beam end, and the pressure nut 281 is anchored to the bottom surface of the beam end, and similarly, the sling conversion device of the present invention can be used for cable force conversion and sling improvement or replacement.
In another embodiment, in addition to the above-described embodiments, a new main cable system for replacing a main cable of a suspension bridge is provided, which includes a new main cable to which the above-described connection structure is attached.
According to the connecting structure, the fixing structure, the new main cable system and the construction method for replacing the main cable of the suspension bridge, provided by the invention, the anchorage system, the cable saddle system and the sling system are replaced one by one, and construction is carried out under the condition that the original main cable is continuously stressed, so that the bridge traffic is not influenced in the construction process; under the condition of ensuring the safety of the cable system structure of the suspension bridge, the defect that the main cable of the traditional suspension bridge is difficult to replace is solved; the method for replacing the main cable is safe and reliable, the construction is simple and feasible, and the whole structure of the bridge is stable, durable, safe and reliable during and after the main cable is replaced.
Claims (18)
1. A connecting structure for replacing a main cable of a suspension bridge is characterized by comprising an anchor connecting structure, a cable saddle connecting structure and a sling connecting structure; the anchor connecting structure comprises a cable strand connecting plate; the cable strand connecting plate is provided with a prestressed anchorage device cable penetrating duct, an original pull rod hole and an anchor hole which penetrate through the upper end surface and the lower end surface of the cable strand connecting plate; the pre-stressed anchor device cable penetrating duct is positioned in the middle of the cable strand connecting plate and is clamped with the anchor head of the pre-stressed anchor device; the anchor holes are positioned at two ends of the strand connecting plate and used for connecting a new main cable strand anchoring structure; the position of the original pull rod hole corresponds to the pull rod hole on the original cable strand connecting plate; the cable saddle connecting structure comprises a base and a new saddle body positioned above the base; one of the top surface of the base or the bottom surface of the new saddle body is provided with a groove structure along the saddle groove direction of the new saddle body, the other one of the top surface of the base or the bottom surface of the new saddle body is provided with a bulge structure matched with the groove structure, and the new saddle body and the base move relatively along the groove structure direction under the action of external force;
the sling connecting structure comprises a new cable clamp buckled on a new main cable, an upper shoulder pole beam arranged at the lower end of the new cable clamp, and a lower shoulder pole beam connected with the upper shoulder pole beam through a tension rod; one end of the tension rod is anchored on one of the upper shoulder pole beam or the lower shoulder pole beam, and the other end of the tension rod penetrates through the other of the upper shoulder pole beam or the lower shoulder pole beam and is provided with a tension device; the lower shoulder pole beam is arranged on an anchorage device at the upper end of the sling.
2. A connecting structure for replacing a main cable of a suspension bridge is characterized by comprising an anchor connecting structure, a cable saddle connecting structure and a sling connecting structure; the anchor connecting structure comprises a cable strand connecting plate; the cable strand connecting plate is provided with a prestressed anchorage device cable penetrating duct, an original pull rod hole and an anchor hole which penetrate through the upper end surface and the lower end surface of the cable strand connecting plate; the pre-stressed anchor device cable penetrating duct is positioned in the middle of the cable strand connecting plate and is clamped with the anchor head of the pre-stressed anchor device; the anchor holes are positioned at two ends of the strand connecting plate and used for connecting a new main cable strand anchoring structure; the position of the original pull rod hole corresponds to the pull rod hole on the original cable strand connecting plate; the cable saddle connecting structure comprises a base and a new saddle body positioned above the base; one of the top surface of the base or the bottom surface of the new saddle body is provided with a groove structure along the saddle groove direction of the new saddle body, the other one of the top surface of the base or the bottom surface of the new saddle body is provided with a bulge structure matched with the groove structure, and the new saddle body and the base move relatively along the groove structure direction under the action of external force;
the sling connecting structure comprises a conversion cable clamp buckled on a new main cable and a sling cable force conversion device; the sling cable force conversion device comprises a tensioning device, a tensioning rod, a cable force conversion inhaul cable, a connecting pull rod and a support flat plate positioned between the original main cable and a beam end ear plate; one end of the cable force conversion cable is connected with one end of the support flat plate through a first connecting pull rod and a first connecting pull rod nut, and the other end of the cable force conversion cable spans across the conversion cable clamp and is connected with the other end of the support flat plate through a second connecting pull rod and a second connecting pull rod nut; the tensioning rod penetrates through the support flat plate and the tensioning device, one end of the tensioning rod is connected with the beam end ear plate, and the other end of the tensioning rod is provided with a tensioning nut; the tensioning device is positioned between the tensioning nut and the support flat plate.
3. A connection structure for replacing a main cable of a suspension bridge according to claim 1 or 2, wherein the saddle connection structure further comprises a sliding means fixedly connected to the groove structure.
4. A connection structure for a replacement main line of a suspension bridge according to claim 1 or 2, wherein said saddle connection structure further comprises sliding means between the groove structure and the protrusion structure.
5. A connection structure for replacing a main rope of a suspension bridge according to claim 1 or 2, wherein the saddle connection structure is used for a main saddle and a slack saddle.
6. The connecting structure for replacing a main cable of a suspension bridge as claimed in claim 1, wherein the lower end of the new cable clamp is connected to a fork lug through a pin shaft, the fork lug is provided with a reaction step, and the upper shoulder pole beam is of a haversian structure and is engaged with the upper end face of the reaction step.
7. The connecting structure for replacing a main cable of a suspension bridge as claimed in claim 1, wherein the lower shoulder pole beam is of a haversian structure and is matched with an anchor cup end face of an anchor at the upper end of the sling.
8. The connecting structure for replacing the main cable of the suspension bridge as claimed in claim 1, wherein the tensioning device comprises a supporting foot, a jack and a tensioning nut which are sequentially sleeved on the end of the tensioning rod, and the tensioning nut is connected with the tensioning rod through a thread.
9. The connecting structure for replacing the main cable of the suspension bridge as claimed in claim 2, wherein the tensioning device comprises a supporting leg and a jack, which are sequentially sleeved on the tensioning rod, one end of the supporting leg is abutted against the supporting plate, the other end of the supporting leg is abutted against one end of the jack, and the other end of the jack is abutted against the tensioning nut.
10. A fixing structure for replacing a main cable of a suspension bridge is characterized by comprising a connecting structure according to any one of claims 1 and 3 to 8, wherein the fixing structure comprises an anchor structure, a cable saddle structure and a sling structure, the anchor structure comprises a first pull rod penetrating through an original pull rod hole, an original cable strand anchor head connected with one end of the first pull rod, a first locking nut connected with the other end of the first pull rod and a new main cable strand anchoring structure connected with the anchor hole; the cable saddle structure comprises an original cable saddle, and the base is positioned at the top of the original cable saddle and connected with the original cable saddle; the sling structure comprises a lower pull rod, an adjusting sleeve and an upper pull rod which are sequentially connected between the sling and a new cable clamp, wherein two ends of the adjusting sleeve are respectively connected with the upper pull rod and the lower pull rod through a first thread and a second thread, and the directions of the first thread and the second thread are opposite.
11. A fixing structure for replacing a main cable of a suspension bridge is characterized by comprising a connecting structure according to any one of claims 2, 3 to 5 and 9, wherein the fixing structure comprises an anchor structure, a cable saddle structure and a sling structure, the anchor structure comprises a first pull rod penetrating through an original pull rod hole, an original cable strand anchor head connected with one end of the first pull rod, a first locking nut connected with the other end of the first pull rod and a new main cable strand anchoring structure connected with the anchor hole; the cable saddle structure comprises an original cable saddle, and the base is positioned at the top of the original cable saddle and connected with the original cable saddle; the sling structure comprises a new cable clamp buckled on a new main cable, a beam end ear plate connected with the beam end and a steel wire rope stay cable, wherein the steel wire rope stay cable rides over the new cable clamp, and two ends of the steel wire rope stay cable are respectively connected with the beam end ear plate.
12. A fixing structure for replacing main cables of a suspension bridge according to claim 10 or 11, wherein the new main cable strand anchoring structure comprises a second pull rod penetrating through the anchor hole, a new cable strand anchor head connected with the top end of the second pull rod, and a second lock nut connected with the bottom end of the second pull rod, and the second pull rod is provided with a thread matched with the second lock nut; the new cable strand anchor head is used for anchoring a new main cable strand; and the second locking nut is clamped at the bottom end of the anchor hole.
13. The fixing structure for replacing main cable of suspension bridge as claimed in claim 10 or 11, wherein said original cable saddle and said boss are provided with corresponding pull rod hole of original cable saddle and pull rod hole of base seat, and the base seat is connected with original cable saddle through pull rod.
14. The fixing structure for replacing the main cable of the suspension bridge as claimed in claim 10 or 11, wherein the bottom surface of the base is of a circular arc structure and is matched with the top of the original cable saddle; the base is provided with a boss which is embedded into a saddle groove of the original cable saddle.
15. A new main cable system for replacing a main cable of a suspension bridge, comprising a new main cable to which the connection structure of claims 1 to 9 is installed.
16. A construction method for replacing a main cable of a suspension bridge, comprising the fixing structure for replacing a main cable of a suspension bridge according to claim 10, comprising the steps of:
A) the installation of the cable saddle connecting structure comprises a main cable saddle connecting structure and a cable saddle scattering connecting structure;
B) installing an anchorage connecting structure;
C) the erection of the main cable comprises the traction of a main cable strand, the anchoring of the main cable strand at an anchorage and the saddle-entering of the main cable strand at a main cable saddle and a cable-scattering saddle;
D) tightening the main cable, making the erected cable strand group into a round shape, and achieving the specified void ratio;
E) mounting a sling connecting structure;
F) the new and old cable system is converted, the original main cable clamp and the sling are removed through the sling connecting structure, and the original main cable is removed after the full-bridge new sling and the original sling cable force are converted; and installing a sling structure, performing cable force conversion between the new sling and the cable force conversion device, and removing the sling cable force conversion device after the cable force conversion is completed.
17. The construction method for replacing the main cable of the suspension bridge according to claim 16, wherein the step B further comprises:
B1) measuring the cable force of the original main cable strand on the original cable strand connecting plate;
B2) disassembling the original main cable strand, the original pull rod and the components thereof;
B3) disassembling an anchor head and a component of the prestressed anchorage device, and disassembling an original cable strand connecting plate;
B4) installing a strand connecting plate, penetrating an anchor rope of the pre-stressed anchor through a pre-stressed anchor rope penetrating channel, installing an anchor head of the pre-stressed anchor on the upper end face of the pre-stressed anchor rope penetrating channel, and adjusting and re-tensioning the pre-stressed anchor to a designed rope force;
B5) connecting the first pull rod to an original anchor head, installing an original main cable strand to the original anchor head, and tensioning and adjusting the cable force to be the same as the original cable force;
B6) and installing a new main cable strand anchoring structure and connecting the new main cable strand anchoring structure with a new cable strand connecting plate through an anchor hole.
18. The construction method for replacing a main cable of a suspension bridge according to claim 16, wherein the step F further comprises:
F1) disassembling the old cable clamp, tensioning the sling through a tensioning device, removing the tension between the old cable clamp and the sling, and disassembling the old cable clamp on the old main cable;
F2) tensioning the sling, and locking when the sling meets the requirement of the cable force;
F3) disassembling the old main cable, and disassembling the old main cable after the sling of the full bridge is tensioned;
F4) lengthening a sling, and sequentially installing a lower pull rod, an adjusting sleeve and an upper pull rod on the sling;
F5) tensioning the lengthened suspension cable until the requirement of cable force is met;
F6) and (5) dismantling the cable force conversion device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911159414.8A CN111305033B (en) | 2019-11-22 | 2019-11-22 | Connecting structure, fixing structure, new main cable system and construction method for replacing main cable of suspension bridge |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911159414.8A CN111305033B (en) | 2019-11-22 | 2019-11-22 | Connecting structure, fixing structure, new main cable system and construction method for replacing main cable of suspension bridge |
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| CN111305033B CN111305033B (en) | 2021-04-13 |
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| FR2806428A1 (en) * | 2000-03-14 | 2001-09-21 | Freyssinet Int Stup | Installation of new or replacement cable, for suspension bridge, in existing anchor block, has new cable anchored in front extension of original block |
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| CN109487709A (en) * | 2018-12-10 | 2019-03-19 | 河海大学 | The interim rope self-balancing push mode suspension bridge sling replacing underpinning device of side straddle-type |
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| FR2806428A1 (en) * | 2000-03-14 | 2001-09-21 | Freyssinet Int Stup | Installation of new or replacement cable, for suspension bridge, in existing anchor block, has new cable anchored in front extension of original block |
| CN102071651A (en) * | 2010-12-15 | 2011-05-25 | 江苏法尔胜新日制铁缆索有限公司 | Sling replacement method for suspension bridge |
| KR20120121713A (en) * | 2011-04-27 | 2012-11-06 | 대림산업 주식회사 | Driving winch with two shafts for high speed and low speed for construction of a suspension bridge |
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| CN111305033B (en) | 2021-04-13 |
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