CN110878517B - 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 PDF

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Publication number
CN110878517B
CN110878517B CN201911159421.8A CN201911159421A CN110878517B CN 110878517 B CN110878517 B CN 110878517B CN 201911159421 A CN201911159421 A CN 201911159421A CN 110878517 B CN110878517 B CN 110878517B
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cable
new
pull rod
original
saddle
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CN110878517A (en
Inventor
彭春阳
谢正元
孙长军
黄子能
黄家珍
李启富
王耀
甘科
王晓山
莫钒
吴东明
李旺龙
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Liuzhou OVM Machinery Co Ltd
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Liuzhou OVM Machinery Co Ltd
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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
    • 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
    • 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
    • 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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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Bridges Or Land Bridges (AREA)

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 an original cable strand connecting plate and a new cable strand connecting plate; 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

Connecting structure, fixing structure, new main cable system and construction method for replacing main cable of suspension bridge
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 a 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 an original cable strand connecting plate and a new cable strand connecting plate; the original cable strand connecting plate is provided with a pull rod hole penetrating through the upper end surface and the lower end surface of the original cable strand connecting plate; the middle section of the new cable strand connecting plate is positioned above the original cable strand connecting plate and is provided with a first pull rod hole corresponding to the pull rod hole of the original cable strand connecting plate; two ends of the new cable strand connecting plate are positioned at two sides of the original cable strand connecting plate and are provided with anchor holes for connecting a new main cable strand anchoring structure; a limiting nut is arranged above the new cable strand connecting plate and is in threaded connection with a first pull rod penetrating through the pull rod hole and the first pull rod hole; the anchorage structure for anchorage of the new main cable can be obtained through the anchoring connection structure on the basis of the original anchorage structure;
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; the sling for the new main cable can be obtained on the basis of the original sling through a sling connecting structure, and the cable force conversion is realized;
according to the other technical scheme, the connecting structure for replacing the main cable of the suspension bridge comprises an anchor connecting structure, a cable saddle connecting structure and a sling connecting structure;
the anchor connecting structure comprises an original cable strand connecting plate and a new cable strand connecting plate; the original cable strand connecting plate is provided with a pull rod hole penetrating through the upper end surface and the lower end surface of the original cable strand connecting plate; the middle section of the new cable strand connecting plate is positioned above the original cable strand connecting plate and is provided with a first pull rod hole corresponding to the pull rod hole of the original cable strand connecting plate; two ends of the new cable strand connecting plate are positioned at two sides of the original cable strand connecting plate and are provided with anchor holes for connecting a new main cable strand anchoring structure; a limiting nut is arranged above the new cable strand connecting plate and is in threaded connection with a first pull rod penetrating through the pull rod hole and the first pull rod hole; the anchorage structure for anchorage of the new main cable can be obtained through the anchoring connection structure on the basis of the original anchorage structure;
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 sling for the new main cable can be obtained on the basis of the original sling through a sling connecting structure, and the cable force conversion is realized;
the first pull rod comprises a locking pull rod with threads, a short pull rod and a pull rod connecting sleeve, wherein two ends of the pull rod connecting sleeve are respectively connected with one ends of the short pull rod and the locking pull rod; the other end of the locking pull rod penetrates through the original cable strand connecting plate and the new cable strand connecting plate and is connected with the first locking nut through threads, and the limiting nut is connected with the locking pull rod through threads and is used for compressing the original cable strand connecting plate and the new cable strand connecting plate; the other end of the short pull rod is connected with the original cable strand anchor head.
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 new cable strand anchor head anchored in an anchor hole, and the new cable strand anchor head is used for anchoring a new main cable strand; 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 the fixing structure comprises an anchorage structure, a cable saddle structure and a sling structure, wherein the anchorage structure comprises a new cable strand anchor head anchored in an anchor hole, and the new cable strand anchor head is used for anchoring a new main cable strand; 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 anchor structure also comprises a second pull rod penetrating through the anchor hole, a second locking nut connected with the bottom end of the second pull rod, and a new cable anchor head connected with the top end of the second pull rod; and the second locking nut is clamped at the end part of the anchor hole.
The further technical scheme is that the new cable anchor head is a pressure-bearing cable anchor head, the anchor hole is in a shape of opening towards two ends of the new cable connecting plate, and the pressure-bearing cable anchor head is clamped at the bottom end of the anchor hole.
The further technical scheme is that the new cable anchor head is a thread adjusting cable anchor head, one end of the thread adjusting cable anchor head penetrates through the anchor hole and is in threaded connection with a third locking nut, and the third 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 a corresponding original cable saddle pull rod hole and a corresponding base pull rod hole, 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 further technical solution is that, a construction method for replacing a main cable of a suspension bridge comprises a fixing structure for replacing a main cable of a suspension bridge, comprising 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 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 temporary 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, and then detaching the original main cable strand;
B2) installing a new cable strand connecting plate and a limiting nut, and limiting the movement of the new cable strand connecting plate in the first direction through the limiting nut;
B3) connecting an original anchor head of an original main cable strand to a first pull rod;
B4) the tension adjusting cable force is the same as the original cable force;
B5) and installing a new cable strand anchor head and connecting the new cable strand anchor head with a new cable strand connecting plate through an anchor hole.
A further technical scheme is that when the first pull rod comprises a locking pull rod, a short pull rod and a pull rod connecting sleeve, step B1 further comprises: the original pull rod and the components thereof are disassembled; step B2 further includes: installing a first pull rod and a component thereof; step B3 further includes: and a short pull rod is arranged at the upper end of the locking pull rod and is connected with one end of the short pull rod through a pull rod connecting sleeve, and the other section of the short pull rod is connected to the original anchor head.
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 original main cable;
F2) tensioning the sling, and locking 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 temporary 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 detaching 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 discloses a schematic diagram of a new strand connecting plate of a connecting structure for replacing a main cable of a suspension bridge.
FIG. 3 is a diagram of: the fixing structure for replacing the main cable of the suspension bridge adopts an anchoring structure schematic diagram of a locking pull rod.
FIG. 4 is a diagram of: the invention discloses a schematic diagram of a new strand connecting plate with an avoidance hole of a connecting structure for replacing a main cable of a suspension bridge.
FIG. 5 is a diagram: the fixing structure for replacing the main cable of the suspension bridge adopts an anchoring structure schematic diagram of a pressure-bearing type strand anchor head.
FIG. 6 is a diagram of: the invention discloses a schematic diagram of a new strand connecting plate of a pressure-bearing type strand anchor head of a connecting structure for replacing a main cable of a suspension bridge.
FIG. 7 is a diagram of: the fixing structure for replacing the main cable of the suspension bridge adopts a schematic anchoring structure of a thread adjusting strand anchor head.
FIG. 8 is a diagram of: the invention discloses a schematic diagram of a new strand connecting plate of a thread adjusting strand anchor head of a connecting structure for replacing a main cable of a suspension bridge.
FIG. 9 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. 10 is a diagram: the invention discloses a schematic diagram of a new sling structure for replacing a main cable of a suspension bridge.
FIG. 11 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. 12 is a diagram: the invention discloses a main cable saddle sectional view for replacing a main cable of a suspension bridge.
FIG. 13 is a graph 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. 14 is a graph 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. 15 is a schematic diagram of: the invention discloses a schematic structural diagram of a cable scattering saddle for replacing a main cable of a suspension bridge.
FIG. 16 is a graph showing: the invention discloses a cable-scattering saddle sectional view for replacing a main cable of a suspension bridge.
FIG. 17 is a graph of: 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. 18 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. 19 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. 20 is a graph 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. 21 is a graph: the invention discloses a structural schematic diagram of an original cable strand connecting plate of a suspension bridge.
FIG. 22 is a schematic diagram of: the invention discloses a schematic diagram of a nut anchor cup pressure-bearing type sling structure to be converted.
In the figure:
11. original cable strand connecting plates; 1101. an original cable strand anchor head; 115. an anchor head of the pre-stressed anchor; 12. connecting plates of new cable strands; 120. a limit nut; 1201. a new strand anchor head; 1202. a pressure-bearing type cable strand anchor head; 1203. adjusting the anchor head of the cable strand by screw threads; 1204. a third lock nut; 1210. a first tie rod hole; 1220. an anchor eye; 1230. avoiding holes; 131. an original pull rod; 1310. a first lock nut; 132. locking the pull rod; 133. a pull rod connecting sleeve; 134. a short pull rod; 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 pull rod; 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 tie rod 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 22 and the embodiments, and features in the following examples and embodiments 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 structure at the top of a tower and is tensioned through a sling 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. 21, the original anchor connection structure includes an original strand connection plate 11, a prestressed anchor at the lower end thereof, an original pull rod 131 penetrating through the original strand connection plate 11, and an original anchor 1101 connected with the original pull rod 131, the upper end surface of the original strand connection plate 11 is clamped to the anchor 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 original pull rod 131 penetrates through a pull rod hole in the original strand connection plate 11 and is connected with a nut, the nut is clamped to the lower end surface of the pull rod hole, the upper end of the original pull rod 131 is connected with the original anchor 1101, the original anchor 1101 is connected with an original main cable 220, the original pull rod 131 gives an upward pulling force to the original strand connection plate 11, so that the original strand connection plate 11 is in a balanced state in a use process; in practical engineering, an anchor head protective cover 111 can be installed on the periphery of an anchor head 115 of the prestressed anchorage device, and is connected with an original cable strand connecting plate 11 through screws, and an original cable strand connecting cylinder is arranged at the lower end of the original cable strand connecting plate 11 and is connected with the original cable strand connecting plate 11 through screws.
As shown in fig. 1 and 2, the anchor connecting structure includes an original cable strand connecting plate 11 and a new cable strand connecting plate 12; the original cable strand connecting plate 11 is provided with a pull rod hole penetrating through the upper end surface and the lower end surface of the original cable strand connecting plate; the middle section of the new cable strand connecting plate 12 is positioned above the original cable strand connecting plate 11 and is provided with a first pull rod hole 1210 corresponding to the pull rod hole of the original cable strand connecting plate 11; the two ends of the new strand connecting plate 12 are located at the two sides of the original strand connecting plate 11, and are provided with anchor holes 1220 for connecting a new main cable strand anchoring structure, wherein the angle of the anchor holes 1220 is determined according to the erection position and the tensioning force of a new main cable, and is not limited herein; a limiting nut 120 is arranged above the new cable strand connecting plate, and the limiting nut 120 is in threaded connection with a first pull rod penetrating through a pull rod hole and a first pull rod hole 1210; specifically, the first link has a threaded section, whether the original link is replaced or not can be determined according to the use degree of the original pull rod 131, in this embodiment, the original pull rod 131 is adopted, the original pull rod 131 has a threaded section, the limit nut 120 is connected with the original pull rod 131 through the threaded section, the top end of the original pull rod 131 is connected with the original cable strand anchor head 1101, the bottom end of the original pull rod 131 penetrates through the first pull rod hole 1210, the original pull rod hole is connected with the first locking nut 1310, and the first locking nut 1310 is clamped on the bottom end face of the original cable strand connecting plate 11; the anchorage structure adopting the anchorage connecting structure further comprises a new strand anchor head 1201 anchored in the anchor hole 1220, specifically, the anchorage structure comprises a second pull rod 141 penetrating through the anchor hole 1220 and a second locking nut 1410 connected with the bottom end of the second pull rod 141, and the second locking nut 1410 is clamped on the bottom end face of the new strand connecting plate 12; in the process of tensioning a new main cable, the new strand connecting plate 12 limits the movement of the new strand connecting plate in the upper and lower directions through the limiting nut 120 and the second locking nut 1410, so that the anchor structure is reliably connected with the original strand connecting plate 11 and is convenient to construct and install;
as shown in fig. 9 and 10, the sling connection structure includes a new cable clamp 217 fastened to a new main cable 218, an upper pole beam 210 mounted to 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, 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 in a specific anchoring mode 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. 11 to 18, 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 a rolling type sliding device and a friction type sliding device, such as a roller; the above-described saddle-attaching structure as shown in fig. 11 to 18 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, for uniformly transmitting the large pressure from the main cables to the cable tower and ensuring 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) the installation of the tie back connection structure, specifically,
B1) measuring the cable force of the original main cable strand on the original cable strand connecting plate, and then detaching the original main cable strand, namely detaching the original anchor head together with the original main cable strand from the original pull rod;
B2) installing a new cable strand connecting plate and a limiting nut, and limiting the movement of the new cable strand connecting plate in the first direction through the limiting nut;
B3) connecting an original anchor head of an original main cable strand to a first pull rod (the first pull rod is an original pull rod, and 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);
B4) the tension adjusting cable force is the same as the original cable force;
B5) installing a new cable strand anchor head and connecting the new cable strand anchor head with a new cable strand connecting plate through an anchor hole,
b5a) installing a second pull rod at the anchor hole;
B5B) installing a new cable strand anchor head at the top end of the second pull rod;
b5c) installing a second locking 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 full-bridge new sling and the original sling cable force are converted; installing a sling structure, performing cable force conversion between the new sling and the temporary conversion device, and removing the sling cable force conversion device after the cable force conversion is completed; 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 temporary 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 embodiment exemplarily shows a specific structure of the first link, and according to other embodiments and practical applications, other structures can be substituted, for example, as shown in fig. 3 and 4, the first tie rod includes a threaded locking tie rod 132, a short tie rod 134 and a tie rod connecting sleeve 133, two ends of the pull rod connecting sleeve 133 are respectively connected with one end of the short pull rod 134 and one end of the solvay pull rod 132, the limit nut 120 is in threaded connection with the locking pull rod 132, the other end of the locking pull rod 132 penetrates through the first pull rod hole 1210, the original pull rod hole is in threaded connection with the first locking nut 1310, the first locking nut 1310 is clamped on the bottom end face of the original cable strand connecting plate 11, the limiting nut 120 is clamped on the top end face of the new cable strand connecting plate 12, and the first locking nut 1310 and the limiting nut 120 which are positioned on the locking pull rod 132 are used for compressing the original cable strand connecting plate 11 and the new cable strand connecting plate 12; the first pull rod construction method adopting the structure adds the following steps in the construction steps:
b1 further includes: the original pull rod and the components thereof are disassembled;
b2 further includes: installing a first pull rod and a component thereof;
b3 further includes: and a short pull rod is arranged at the upper end of the locking pull rod and is connected with one end of the short pull rod through a pull rod connecting sleeve, and the other section of the short pull rod is connected to the original anchor head.
An avoidance hole 1230 is formed in the middle section of the new cable strand connecting plate 12, corresponding to the original anchor head protective cover, and is used for avoiding the original anchor head protective cover when the new cable strand connecting plate 12 is installed; similarly, in the process of tensioning the new main cable, the new cable strand connecting plate 12 limits the movement of the new main cable strand connecting plate in the up-down direction through the limiting nut 120 and the second locking nut 1410, so that the anchor structure is reliably connected with the original cable strand connecting plate 11, and is convenient to construct and install.
The above embodiments exemplarily show the connection mode 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 relations can be used instead, for example: as shown in fig. 5 and 6, the new strand anchor head is a pressure-bearing type strand anchor head 1202, the anchor hole 1220 is open to one end near the end of the new strand connecting plate 12, the pressure-bearing type strand anchor head 1202 is clamped at the bottom end of the anchor hole 1220, the pressure-bearing type strand anchor head 1202 is used for anchoring a new strand, the new strand is connected with the other end strand anchor head through the anchor hole 220, specifically, the pressure-bearing type strand anchor head 1202 is loaded into the anchor hole from the end opening of the new strand connecting plate 12, in other embodiments, the main cable length can be adjusted by adding a U-shaped pad ring with a certain thickness between the new strand connecting plate and the pressure-bearing type strand anchor head, and the main cable line shape can be adjusted to the design requirement; for example, fig. 7 and 8, the new strand anchor head is a threaded adjusting strand anchor head 1203, one end of the threaded adjusting strand anchor head 1203 penetrates through an anchor hole 1220 and is in threaded connection with a third locking nut 1204, the third locking nut 1204 is clamped at the bottom end of the anchor hole 1220, the threaded adjusting strand anchor head 1203 is used for anchoring the new strand, and the new strand penetrates through the anchor hole 220 and is connected with the other end of the strand anchor head.
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 used instead, for example, the connection relationships are fixedly connected by welding, snapping, mortise and tenon connection, 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 contacts with the base 32, and the sliding device 34 is used for realizing pre-deflection and sliding of the new saddle 33 during tensioning of the new main cable by the relative movement of the sliding device 34 and the base 32; 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 way 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, other connection relationships may be used instead, 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 huff 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 surface 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 anchorage 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, for example: as shown in fig. 19 and 20, the sling attachment structure includes a conversion cable clip 221 fastened to the new main cable 218, and 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 connecting pull rod and a first connecting 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 connecting pull rod and a second connecting 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 at the end part of the tensioning rod 212, one end of the supporting foot 214 is propped against the upper end face of the supporting flat plate 224, the other end of the supporting foot is propped 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 invention is used for a sling structure connected with a beam end through the lower fork lug 27 and the lower pin 28, and according to other embodiments and practical applications, the sling structure with a nut anchor cup bearing pressure at the lower end can also be used, as shown in fig. 22, a sling 26 is anchored at the beam end by using a lower anchor head 271 and a bearing nut 281, the lower anchor head 271 and the bearing nut 281 are in threaded connection at the lower part of the beam end, the bearing nut 281 is anchored at the bottom surface of the beam end, and similarly, the sling conversion device of the 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 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 (22)

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 an original cable strand connecting plate and a new cable strand connecting plate; the original cable strand connecting plate is provided with a pull rod hole penetrating through the upper end surface and the lower end surface of the original cable strand connecting plate; the middle section of the new cable strand connecting plate is positioned above the original cable strand connecting plate and is provided with a first pull rod hole corresponding to the pull rod hole of the original cable strand connecting plate; two ends of the new cable strand connecting plate are positioned at two sides of the original cable strand connecting plate and are provided with anchor holes for connecting a new main cable strand anchoring structure; a limiting nut is arranged above the new cable strand connecting plate and is in threaded connection with a first pull rod penetrating through the pull rod hole and the first pull rod hole;
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 an original cable strand connecting plate and a new cable strand connecting plate; the original cable strand connecting plate is provided with a pull rod hole penetrating through the upper end surface and the lower end surface of the original cable strand connecting plate; the middle section of the new cable strand connecting plate is positioned above the original cable strand connecting plate and is provided with a first pull rod hole corresponding to the pull rod hole of the original cable strand connecting plate; two ends of the new cable strand connecting plate are positioned at two sides of the original cable strand connecting plate and are provided with anchor holes for connecting a new main cable strand anchoring structure; a limiting nut is arranged above the new cable strand connecting plate and is in threaded connection with a first pull rod penetrating through the pull rod hole and the first pull rod hole;
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. The connecting structure for replacing the main cable of the suspension bridge as claimed in claim 1 or 2, wherein the first pull rod comprises a locking pull rod with threads, a short pull rod and a pull rod connecting sleeve, and two ends of the pull rod connecting sleeve are respectively connected with one end of the short pull rod and one end of the locking pull rod; the other end of the locking pull rod penetrates through the original cable strand connecting plate and the new cable strand connecting plate and is connected with the first locking nut through threads, and the limiting nut is connected with the locking pull rod through threads and is used for compressing the original cable strand connecting plate and the new cable strand connecting plate; the other end of the short pull rod is connected with the original cable strand anchor head.
4. 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.
5. 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.
6. 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.
7. 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.
8. 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.
9. 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.
10. 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.
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 1 and 3 to 9, wherein the fixing structure comprises an anchorage structure, a cable saddle structure and a sling structure, the anchorage structure comprises a new cable strand anchor head anchored in an anchor hole, and the new cable strand anchor head is used for anchoring a new main cable strand; 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.
12. 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 to 6 and 10, wherein the fixing structure comprises an anchor structure, a cable saddle structure and a sling structure, the anchor structure comprises a new cable strand anchor head anchored in an anchor hole, and the new cable strand anchor head is used for anchoring a new main cable strand; 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.
13. The fixing structure for replacing the main cable of the suspension bridge as claimed in claim 11 or 12, wherein the anchor structure further comprises a second pull rod penetrating through the anchor hole, a second lock nut connected with the bottom end of the second pull rod, and a new strand anchor head connected with the top end of the second pull rod; and the second locking nut is clamped at the end part of the anchor hole.
14. The fixing structure for replacing main cables of a suspension bridge as claimed in claim 11 or 12, wherein the new strand anchor head is a pressure-bearing type strand anchor head, the anchor hole is formed in a shape that is opened to both ends of the new strand connecting plate, and the pressure-bearing type strand anchor head is caught at a bottom end of the anchor hole.
15. The fixing structure for replacing a main cable of a suspension bridge as claimed in claim 11 or 12, wherein the new strand anchor head is a screw adjustment strand anchor head, one end of the screw adjustment strand anchor head penetrates through the anchor hole and is in threaded connection with a third locking nut, and the third locking nut is fastened to the bottom end of the anchor hole.
16. The fixing structure for replacing main cable of suspension bridge as claimed in claim 11 or 12, wherein said original cable saddle and boss are provided with corresponding pull rod hole of original cable saddle and pull rod hole of base, and the base is connected with original cable saddle through pull rod.
17. The fixing structure for replacing the main cable of the suspension bridge as claimed in claim 11 or 12, 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.
18. 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 any one of claims 1 to 10 is installed.
19. 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 11, 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 temporary conversion device, and removing the sling cable force conversion device after the cable force conversion is completed.
20. The construction method for replacing the main cable of the suspension bridge according to claim 19, wherein the step B further comprises:
B1) measuring the cable force of the original main cable strand on the original cable strand connecting plate, and then detaching the original main cable strand;
B2) installing a new cable strand connecting plate and a limiting nut, and limiting the movement of the new cable strand connecting plate in the first direction through the limiting nut;
B3) connecting an original anchor head of an original main cable strand to a first pull rod;
B4) the tension adjusting cable force is the same as the original cable force;
B5) and installing a new cable strand anchor head and connecting the new cable strand anchor head with a new cable strand connecting plate through an anchor hole.
21. The construction method for replacing a main cable of a suspension bridge as claimed in claim 20, wherein when the first tension rod comprises a locking tension rod, a short tension rod and a tension rod connecting sleeve, step B1 further comprises: the original pull rod and the components thereof are disassembled; step B2 further includes: installing a first pull rod and a component thereof; step B3 further includes: and a short pull rod is arranged at the upper end of the locking pull rod and is connected with one end of the short pull rod through a pull rod connecting sleeve, and the other section of the short pull rod is connected to the original anchor head.
22. The construction method for replacing a main cable of a suspension bridge according to claim 19, 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 original main cable;
F2) tensioning the sling, and locking 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 temporary conversion device.
CN201911159421.8A 2019-11-22 2019-11-22 Connecting structure, fixing structure, new main cable system and construction method for replacing main cable of suspension bridge Active CN110878517B (en)

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CN111395207A (en) * 2020-03-24 2020-07-10 中铁大桥（南京）桥隧诊治有限公司 Rapid dismantling device for bridge flexible cable structure and implementation method
CN115030065B (en) * 2022-06-22 2023-04-21 广东长大道路养护有限公司 Suspension bridge cable clamp fastening construction method

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