CN110820524B - 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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- CN110820524B CN110820524B CN201911158047.XA CN201911158047A CN110820524B CN 110820524 B CN110820524 B CN 110820524B CN 201911158047 A CN201911158047 A CN 201911158047A CN 110820524 B CN110820524 B CN 110820524B
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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
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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
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 original main cable system is high, the structural design of a new main cable saddle and a cable saddle is difficult, and how to realize the anchoring conversion of a main cable strand at an anchoring part 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 new cable strand connecting plate comprises a first connecting plate and a second connecting plate which are detachably connected, and the first connecting plate and the second connecting plate are respectively positioned on two sides of the original cable strand connecting plate; the first connecting plate and the second connecting plate are provided with first protruding parts clamped on the lower end faces of the original cable strand connecting plates; the first connecting plate and the second connecting plate are both provided with anchor holes for connecting a new main cable strand anchoring 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; and two ends of the new main cable are connected with the anchor connecting structure, and the middle section of the new main cable penetrates through the new saddle body, passes through the tower top and is tensioned through the sling connecting structure.
A connecting structure for replacing a main cable of a suspension bridge comprises an anchor connecting structure, a cable saddle 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 new cable strand connecting plate comprises a first connecting plate and a second connecting plate which are detachably connected, and the first connecting plate and the second connecting plate are respectively positioned on two sides of the original cable strand connecting plate; the first connecting plate and the second connecting plate are provided with first protruding parts clamped on the lower end faces of the original cable strand connecting plates; the first connecting plate and the second connecting plate are both provided with anchor holes for connecting a new main cable strand anchoring 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; and two ends of the new main cable are connected with the anchor connecting structure, and the middle section of the new main cable penetrates through the new saddle body, passes through the tower top and is tensioned through the sling connecting structure.
The further technical scheme is that the original cable strand connecting plate is connected with a first pull rod, one end of the first pull rod is anchored on the bottom surface of the original cable strand connecting plate through a first locking nut, and the other end of the first pull rod penetrates through the original cable strand connecting plate and is connected with an original cable strand anchor head; the upper end of the original cable strand connecting plate is provided with an anchor head protecting cover; the first connecting plate and the second connecting plate are provided with structures avoiding the first pull rod and the anchor head protective cover.
The further technical scheme is that the first connecting plate and the second connecting plate are connected through a locking screw and a nut which are matched with each other.
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.
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 a 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; the sling structure prolongs the length of the original sling, the upper pull rod is connected with the new cable clamp, the lower pull rod is connected with the upper end of the sling, the formed new sling is connected with a new main cable, and the cable force of the sling is transferred to the new main cable.
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 further 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 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 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 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) converting the new and old cable systems, and installing a sling structure; specifically, the conversion of a new cable system and an old cable system is to transfer the sling cable force from an original main cable to a new main cable through a sling connecting structure, unload the sling cable force on the original main cable, and remove the original main cable after the full-bridge new sling cable and the original sling cable force are converted; the sling structure is specifically arranged by carrying out cable force conversion between a new sling and a sling connecting structure, wherein a lower pull rod, an adjusting sleeve and an upper pull rod are sequentially arranged at the upper end of the sling, and after the cable force conversion is finished, an upper carrying pole beam, a tension rod, a lower carrying pole beam and a tension device are dismantled.
The further technical scheme is that the step B also comprises the following steps:
B1) arranging a first connecting plate and a second connecting plate at two sides of the original cable strand connecting plate, connecting the first connecting plate and the second connecting plate, and limiting the movement of the first connecting plate and the second connecting plate in a first direction through first protruding parts of the first connecting plate and the second connecting plate;
B2) 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.
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 between the sling and a new cable clamp;
F5) tensioning the lengthened suspension cable until the requirement of cable force is met;
F6) and (4) dismantling the upper shoulder pole beam, the tension rod, the lower shoulder pole beam and the tensioning 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; in the replacement process of the anchorage system, a pull rod connected with the anchor head of the original cable strand in the original anchorage structure does not need to be dismantled to install a new cable strand connecting plate, so that construction is facilitated; 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 invention discloses an anchoring structure schematic diagram of a fixing structure for replacing a main cable of a suspension bridge, wherein the fixing structure is provided with avoidance holes.
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 invention discloses a schematic diagram of a new strand connecting plate with a sliding groove of a connecting structure for replacing a main cable of a suspension bridge.
FIG. 6 is a diagram of: the invention relates to a plane view of a new strand connecting plate with a sliding groove of a connecting structure for replacing a main cable of a suspension bridge.
FIG. 7 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. 8 is a diagram of: the invention discloses a schematic diagram of a new sling structure for replacing a main cable of a suspension bridge.
FIG. 9 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. 10 is a diagram: the invention discloses a main cable saddle sectional view for replacing a main cable of a suspension bridge.
FIG. 11 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. 12 is a diagram: 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. 13 is a graph of: the invention discloses a schematic structural diagram of a cable scattering saddle for replacing a main cable of a suspension bridge.
FIG. 14 is a graph of: the invention discloses a cable-scattering saddle sectional view for replacing a main cable of a suspension bridge.
FIG. 15 is a schematic diagram 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. 16 is a graph showing: 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. 17 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. 18 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. 19 is a graph of: the invention discloses a structural schematic diagram of an original cable strand connecting plate of a suspension bridge.
FIG. 20 is a graph of: the invention discloses a structural schematic diagram of a new cable strand connecting plate.
FIG. 21 is a graph: the invention also discloses a novel cable strand connecting plate structure.
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; 111. an anchor head protective cover; 1110. avoiding holes; 1101. an original cable strand anchor head; 12. connecting plates of new cable strands; 121. a first connecting plate; 122. a second connecting plate; 1201. a new strand anchor head; 1202. a first protrusion; 1220. an anchor eye; 1230. a first tie rod hole; 131. a first pull rod; 1312. a chute; 1310. a first lock nut; 141. a second pull rod; 1410. a second lock nut; 115. an anchor head of the pre-stressed anchor; 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. 19, the original cable connecting structure to be replaced in this embodiment includes an original cable connecting plate 11, a prestressed anchorage located at the lower end of the original cable connecting plate, a first pull rod 131 and an original anchor head 1101, the upper end surface of the original cable connecting plate 11 is clamped to the anchor head 115 of the prestressed anchorage, the prestressed anchorage provides a downward pulling force to the original cable connecting plate 11, the lower end of the first pull rod 131 penetrates through a pull rod hole in the original cable connecting 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 anchor head 1101, the original anchor head 1101 is connected to the old main cable, the first pull rod 131 provides an upward pulling force to the original cable connecting plate 11, so the original cable connecting plate 11 is in a balanced state during use; 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 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 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 further provided with a first pull rod 131 penetrating through the upper end surface and the lower end surface of the original cable strand connecting plate, one end of the first pull rod 131 is anchored on the bottom end surface of the original cable strand connecting plate 11 through a first locking nut 1310, the other end of the first pull rod is connected with an original cable strand anchor head 1101, and the original cable strand anchor head 1101 is used for anchoring the original main cable 220; the new cable strand connecting plate 12 comprises a first connecting plate 121 and a second connecting plate 122 which are detachably connected, and the first connecting plate and the second connecting plate are respectively positioned on two sides of the original cable strand connecting plate 11; the first connecting plate 121 and the second connecting plate 122 are both provided with a first protruding part 1202 clamped on the lower end face of the original strand connecting plate 11, and the first protruding part 1202 is used for limiting the upward movement of the new strand connecting plate 12 under the action of the pulling force of the new main cable; the first connecting plate 121 and the second connecting plate 122 are both provided with anchor holes 1220 for connecting new main cable strand anchoring structures; the edges of the upper end faces of the first connecting plate 121 and the second connecting plate 122 respectively extend to the first pull rod 131 close to one side of the first connecting plate, so that the first pull rod 131 does not need to be detached when a new strand connecting plate 12 is installed; the angle of the anchor hole 1220 is determined according to the installation position and the tension force of the new main cable, and is not limited herein; the anchor structure adopting the cable strand connecting plate further comprises 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, wherein 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;
as shown in fig. 7 and 8, 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, 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. 9 to 16, 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. 9 to 16 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, wherein a boss 322 is arranged on the bottom surface, 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, a base pull rod hole 323 is arranged at the corresponding position of the boss 322 in 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) mounting an anchor connecting structure, specifically, B1) arranging a first connecting plate and a second connecting plate on both sides of an original strand connecting plate, and connecting, and restricting movement thereof in a first direction by first protruding portions of the first connecting plate and the second connecting plate;
B2) 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; specifically, B2a) installing a second pull rod at the anchor hole;
B2B) installing a new cable strand anchor head at the top end of the second pull rod;
b2c) 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 sling cable force is transferred from the original main cable to the new main cable through the sling connecting structure, the sling cable force on the original main cable is unloaded, and the original main cable is removed after the full-bridge new sling cable and the original sling cable force are converted; the installation sling structure is used for carrying out cable force conversion between a new sling and a sling connecting structure, a lower pull rod, an adjusting sleeve and an upper pull rod are sequentially installed at the upper end of the sling, and after the cable force conversion is finished, an upper carrying pole beam, a tension rod, a lower carrying pole beam and a tension device are dismantled; 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 (4) dismantling the upper shoulder pole beam, the tension rod, the lower shoulder pole beam and the tensioning 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 connecting plate 121 and the second connecting plate 122, and according to other embodiments and practical applications, other structures may be substituted, for example, as shown in fig. 3 and 4, in part of the engineering, the anchor head protecting cover 111 is disposed at the upper end of the original strand connecting plate 11 and between the first pull rods 131; the upper end surfaces of the first connecting plate 121 and the second connecting plate 122 are provided with first pull rod holes 1230 at positions corresponding to the first pull rods 131, and the abutting structure of the first connecting plate 121 and the second connecting plate 122 forms an avoidance hole 1110 avoiding the anchor head protective cover 111; the construction method comprises the following steps: B) the installation of the tie back connection structure, specifically,
B1) the original main cable force is recorded,
B2) the first pull rod is removed, and the first pull rod is pulled out,
B3) a first connecting plate and a second connecting plate are arranged on two sides of the original cable strand connecting plate,
B4) the first pull rod penetrates through the original cable strand connecting plate and the new cable strand connecting plate and is anchored by a first locking nut,
B5) tensioning the original main cable to the recorded cable force;
B6) 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 anchoring 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 for anchoring a new main cable strand,
b6c) installing a second lock nut at the bottom end of the second pull rod, wherein the second lock nut is positioned at the bottom end of the anchor hole.
As shown in fig. 5 and 6, the abutting structure of the first connecting plate 121 and the second connecting plate 122 forms an avoiding hole 1110 avoiding the anchor head protective cover 111, and forms a sliding groove 1312 avoiding the relative movement track of the first pull rod 131 during the installation process of the first connecting plate 121 and the second connecting plate 122; the construction method comprises the following steps: B) the installation of the tie back connection structure, specifically,
B1) installing a new cable strand connecting plate, and respectively installing a first connecting plate and a second connecting plate at two sides of the original cable strand connecting plate, wherein the butt joint structure of the first connecting plate and the second connecting plate forms a avoidance hole and a sliding groove for avoiding relative movement of an anchor head protective cover and a first pull rod, so that when the new cable strand connecting plate is installed, the pull rod of the original anchorage structure, namely the first pull rod, does not need to be dismantled;
B2) 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 anchoring hole,
b2a) installing a second pull rod at the anchor hole,
B2B) installing a new cable strand anchor head at the top end of the second pull rod for anchoring a new main cable strand,
b2c) installing a second locking nut at the bottom end of the second pull rod, wherein the second locking nut is positioned at the bottom end of the anchor hole.
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: the anchor head of the new strand is a pressure-bearing type strand anchor head, 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 strand anchor head is clamped at the bottom end of the anchor hole 1220 and 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.
The above embodiment exemplarily shows that the first protrusion 1202 is located at the bottom surface of the first connecting plate 121 and the second connecting plate 122, and other positions may be substituted according to other embodiments or practical applications, for example, as shown in fig. 20 and 21, two first protrusions 1202 are respectively located at the opposite side surfaces of the first connecting plate 121 and the second connecting plate 122, and the location of the first protrusion 1202 is related to the thickness of the original strand connecting plate 11, and no specific location is limited herein.
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. 17 and 18, the sling connection 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, the first connecting plate 121 and the second connecting plate 122 are connected by a locking screw and a nut, which are matched with each other, so as to further improve the stability of the strand connecting plate during the construction process and the later use process.
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; in the replacement process of the anchorage system, a pull rod connected with the anchor head of the original cable strand in the original anchorage structure does not need to be dismantled to install a new cable strand connecting plate, so that construction is facilitated; 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 (20)
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 new cable strand connecting plate comprises a first connecting plate and a second connecting plate which are detachably connected, and the first connecting plate and the second connecting plate are respectively positioned on two sides of the original cable strand connecting plate; the first connecting plate and the second connecting plate are provided with first protruding parts clamped on the lower end faces of the original cable strand connecting plates; the first connecting plate and the second connecting plate are both provided with anchor holes for connecting a new main cable strand anchoring 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.
2. 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 has 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.
3. 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.
4. 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.
5. 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 new cable strand connecting plate comprises a first connecting plate and a second connecting plate which are detachably connected, and the first connecting plate and the second connecting plate are respectively positioned on two sides of the original cable strand connecting plate; the first connecting plate and the second connecting plate are provided with first protruding parts clamped on the lower end faces of the original cable strand connecting plates; the first connecting plate and the second connecting plate are both provided with anchor holes for connecting a new main cable strand anchoring 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.
6. The connecting structure for replacing main cables of a suspension bridge as claimed in claim 1 or 5, wherein the original cable connecting plate is connected with a first pull rod, one end of the first pull rod is anchored on the bottom surface of the original cable connecting plate through a first locking nut, and the other end of the first pull rod penetrates through the original cable connecting plate and is connected with the original cable anchor head; the upper end of the original cable strand connecting plate is provided with an anchor head protecting cover; the first connecting plate and the second connecting plate are provided with structures avoiding the first pull rod and the anchor head protective cover.
7. A connecting structure for replacing main cables of a suspension bridge according to claim 1 or 5, wherein the first connecting plate and the second connecting plate are connected by a locking screw and a nut which are matched.
8. A connection structure for replacing a main cable of a suspension bridge according to claim 1 or 5, wherein said saddle connection structure further comprises a sliding means fixedly connected to the groove.
9. A connection arrangement for a replacement main line for a suspension bridge according to claim 1 or 5, wherein the saddle connection arrangement further comprises sliding means between the groove formation and the protrusion formation.
10. A connection structure for replacing main cables of a suspension bridge according to claim 1 or 5, wherein the saddle connection structure is used for a main saddle and a slack saddle.
11. The connecting structure for replacing the main cable of the suspension bridge as claimed in claim 5, 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.
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 1 to 4 and 6 to 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 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.
13. A fixing structure for replacing a main cable of a suspension bridge, which is characterized by comprising a connecting structure as claimed in any one of claims 5 to 11, 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 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.
14. The fixing structure for replacing the main cable of the suspension bridge as claimed in claim 12 or 13, wherein the anchor structure further comprises a second pull rod penetrating through the anchor hole, a new 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.
15. The fixing structure for replacing main cable of suspension bridge as claimed in claim 12 or 13, wherein the original cable saddle and the 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 the original cable saddle through the pull rod.
16. The fixing structure for replacing the main cable of the suspension bridge as claimed in claim 12 or 13, 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.
17. 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 11 is installed.
18. 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 12, 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) and (4) converting the new and old cable systems and installing a sling structure.
19. The construction method for replacing the main cable of the suspension bridge according to claim 18, wherein the step B further comprises:
B1) arranging a first connecting plate and a second connecting plate at two sides of the original cable strand connecting plate, connecting the first connecting plate and the second connecting plate, and limiting the movement of the first connecting plate and the second connecting plate in a first direction through first protruding parts of the first connecting plate and the second connecting plate;
B2) 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.
20. The construction method for replacing a main cable of a suspension bridge according to claim 18, 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 between the sling and a new cable clamp;
F5) tensioning the lengthened suspension cable until the requirement of cable force is met;
F6) and (4) dismantling the upper shoulder pole beam, the tension rod, the lower shoulder pole beam and the tensioning device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911158047.XA CN110820524B (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 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911158047.XA CN110820524B (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 |
Publications (2)
| Publication Number | Publication Date |
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| CN110820524A CN110820524A (en) | 2020-02-21 |
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| FR2534948B1 (en) * | 1982-10-22 | 1985-07-12 | Arnodin Sa Ets | METHOD FOR REPLACING A TABLE OF CABLE CARRIERS OF A SUSPENDED BRIDGE BY LEAVING THE WORK IN SERVICE DURING THE WHOLE DURATION OF THE OPERATION |
| US7743444B2 (en) * | 2004-06-09 | 2010-06-29 | Incorporated Administrative Agency Public Works Research Institute | Cable stayed suspension bridge making combined use of one-box and two-box girders |
| CN2739227Y (en) * | 2004-11-06 | 2005-11-09 | 柳州欧维姆机械股份有限公司 | Changeable suspension bridge anchored prestressed anchoring system |
| CN100570067C (en) * | 2008-01-08 | 2009-12-16 | 中交第二公路勘察设计研究院有限公司 | Prestressed method of suspension bridge anchoring changeable formula and device |
| CN202031027U (en) * | 2011-04-02 | 2011-11-09 | 柳州欧维姆机械股份有限公司 | Whole replaceable anchorage system |
| CN202543804U (en) * | 2012-04-23 | 2012-11-21 | 柳州欧维姆机械股份有限公司 | Main cable-replaceable cable clamp |
| CN103526699B (en) * | 2013-10-21 | 2015-06-10 | 中国石油化工股份有限公司 | Method for replacing pipe bridge hanging steel ropes |
| CN104233962A (en) * | 2014-08-11 | 2014-12-24 | 王双其 | Method for reinforcing and strengthening main cable of suspension bridge |
| JP6798082B2 (en) * | 2016-07-07 | 2020-12-09 | 株式会社三井Ｅ＆Ｓ鉄構エンジニアリング | How to replace the main cable of the suspension bridge |
| CN107119572B (en) * | 2017-06-22 | 2018-12-18 | 四川路桥华东建设有限责任公司 | A kind of main rope of suspension bridge strand second traction enters the construction method of tunnel anchorage |
| CN108118622A (en) * | 2018-02-06 | 2018-06-05 | 中交二公局第二工程有限公司 | A kind of steel-concrete composite beam cable-stayed bridge main cable and girder construction cable crane system |
| JP6725559B2 (en) * | 2018-02-21 | 2020-07-22 | 日本橋梁株式会社 | Hanging material replacement device and hanging material replacement method using the same |
| CN108660946B (en) * | 2018-04-20 | 2020-08-21 | 武汉中交试验检测加固工程有限责任公司 | Method for replacing main cable of suspension bridge |
| CN209584873U (en) * | 2018-12-10 | 2019-11-05 | 河海大学 | The double interim rope self-balancing push mode suspension bridge sling replacing underpinning devices of straddle-type |
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