CN110820525A - Cable strand connecting structure for replacing main cable of suspension bridge, anchorage structure and construction method - Google Patents

Cable strand connecting structure for replacing main cable of suspension bridge, anchorage structure and construction method Download PDF

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Publication number
CN110820525A
CN110820525A CN201911159397.8A CN201911159397A CN110820525A CN 110820525 A CN110820525 A CN 110820525A CN 201911159397 A CN201911159397 A CN 201911159397A CN 110820525 A CN110820525 A CN 110820525A
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China
Prior art keywords
pull rod
cable strand
original
cable
connecting plate
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Pending
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CN201911159397.8A
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Chinese (zh)
Inventor
彭春阳
黄家珍
黄子能
李启富
王耀
吴东明
李旺龙
莫钒
何国明
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LIUZHOU CONSTRUCTION MACHINERY FACTORY GENERAL
Liuzhou OVM Machinery Co Ltd
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LIUZHOU CONSTRUCTION MACHINERY FACTORY GENERAL
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Priority to CN201911159397.8A priority Critical patent/CN110820525A/en
Publication of CN110820525A publication Critical patent/CN110820525A/en
Pending legal-status Critical Current

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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 cable strand connecting structure, an anchorage structure and a construction method for replacing a main cable of a suspension bridge, wherein the cable strand 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 the new main cable strand anchoring structure; and 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 strand connecting structure, the anchorage structure and the construction method for replacing the main cable of the suspension bridge, disclosed by the invention, can ensure that the new cable strand connecting plate and the original cable strand connecting plate are safely and reliably connected, can conveniently carry out system conversion of the new main cable and the original main cable, and do not influence normal traffic in the construction process.

Description

Cable strand connecting structure for replacing main cable of suspension bridge, anchorage structure and construction method
Technical Field
The invention relates to an anchorage structure, in particular to a strand connecting structure for replacing a main cable of a suspension bridge, the anchorage structure and a construction method.
Background
The suspension bridge is used as a bridge with the largest spanning capability and is developed rapidly in China, and a main cable used as a life line of the suspension bridge is a main subject of research of engineering technicians of various countries all over the world, and particularly the research on corrosion prevention of the main cable is particularly emphasized, because the consequence is unimaginable if a cable system is corroded. In order to ensure the safety of a bridge and the safety of a cable structure, the cable needs to be protected by corrosion prevention, but the corrosion prevention research of a main cable of a suspension bridge has not yet achieved a satisfactory result so far, and therefore, at present, a plurality of bridge inhaul cables still solve the problems of corrosion prevention and safety performance of the bridge inhaul cables by means of cable replacement; in a structure system of a suspension bridge, a cable clamp capable of replacing a main cable is used on a newly-built small suspension bridge, the main cable of the suspension bridge can be replaced after the cable clamp is used, in an anchorage system, the problem of anchoring of a new main cable is solved through the newly-built anchorage system, and in the replacement construction of the main cable of the large and built suspension bridge, an anchorage structure and a method for anchoring the new main cable are obtained by improving the original anchorage structure.
Disclosure of Invention
Aiming at the problems, the invention provides a strand connecting structure, an anchorage structure and a construction method for replacing a main cable of a suspension bridge, aiming at solving the problem of how to improve the original anchorage structure to obtain the anchorage structure for anchoring a new main cable in the construction of replacing the main cable; 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 cable strand connecting structure for replacing a main cable of a suspension bridge 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 the new main cable strand anchoring structure; and 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 connecting structure of the technical scheme can ensure that the new cable connecting plate and the original cable connecting plate are safely and reliably connected, can conveniently carry out system conversion of a new main cable and an original main cable, and ensures that the main cable is safe, reliable, stable and durable in the cable changing period and after the cable is changed; the original anchor structure is improved to be a new main cable anchor structure on the basis of the original anchor structure, the original anchor structure can be used for bearing the anchoring force of the main cable in the construction process, and the original anchor structure is dismantled after the new anchor structure and the new main cable are installed, so that traffic is not influenced in the construction process; the operation of adjusting the line shape of the hanging cable of the new main cable is convenient, the old main cable is easy to remove, and the removing steps are simple and convenient.
The further technical scheme is that 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 ends of the locking pull rod and the short 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 a first locking nut through threads, and the limiting nut is connected with the threaded section of the locking pull rod 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. This technical scheme is through adding locking pull rod with former strand connecting plate and new strand connecting plate seamless connection, can be arranged in the bridge engineering that cable force is bigger.
The further technical scheme is that the upper end of an original cable strand connecting plate is connected with an anchor head protecting cover, and the middle section of a new cable strand connecting plate is provided with an avoidance hole penetrating through the top surface of the new cable strand connecting plate; the inner diameter of the avoiding hole is larger than the outer diameter of the anchor head protection cover.
The further technical scheme is that the limiting nut is of a Harvard structure.
The anchor structure for replacing the main cable of the suspension bridge comprises the cable strand connecting structure, a second pull rod penetrating through an 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 anchor structure for replacing the main cable of the suspension bridge comprises the cable strand connecting structure and a pressure-bearing type cable strand anchor head for anchoring a new main cable strand, wherein the anchor hole is in a shape of opening towards one end of a new cable strand connecting plate, and the pressure-bearing type cable strand anchor head is clamped at the bottom end of the anchor hole.
The further technical scheme is that the anchorage structure for replacing the main cable of the suspension bridge comprises the cable strand connecting structure, a thread adjusting cable strand anchor head and a third locking nut, wherein the thread adjusting cable strand anchor head is used for anchoring a new main cable strand, one end of the thread adjusting cable strand anchor head penetrates through an anchor hole and is in threaded connection with the third locking nut, and the third locking nut is clamped at the bottom end of the anchor hole.
The construction method of the anchorage structure for replacing the main cable of the suspension bridge comprises the following steps:
A) 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;
B) 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;
C) connecting an original anchor head of an original main cable strand to a first pull rod;
D) the tension adjusting cable force is the same as the original cable force;
E) installing a new main cable strand anchoring structure and anchoring and connecting the new main cable strand anchoring structure with a new cable strand connecting plate through an anchor hole;
F) installing a new main cable strand and adjusting the line shape of the main cable to meet the design requirement;
G) and after the new main cable system is converted, removing the original main cable strand and the original anchor head.
Its further technical scheme does, when first pull rod includes locking pull rod, short pull rod, pull rod adapter sleeve, wherein, step A still includes:
A1) the original pull rod and the components thereof are disassembled;
the step B also comprises the following steps:
B1) installing a first pull rod and a component thereof;
step C also includes:
C1) 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;
C2) the other section of the short tie rod is connected to the original anchor head.
The further technical scheme is that the step E also comprises the following steps:
E1) a second pull rod is arranged at the anchor hole;
E2) installing a new cable strand anchor head at the top end of the second pull rod;
E3) and a second locking nut is arranged at the bottom end of the second pull rod.
The invention has the beneficial effects that:
1. the cable strand connecting structure, the anchor structure and the construction method for replacing the main cable of the suspension bridge, provided by the invention, can ensure that a new main cable strand is safely and reliably connected with an original anchor, can conveniently convert a new main cable system and an old main cable system, and ensure that the main cable is safe, reliable, stable and durable during cable replacement and after cable replacement.
2. According to the cable strand connecting structure, the anchorage structure and the construction method for replacing the main cable of the suspension bridge, the structure at the anchorage replacing position of the main cable of the suspension bridge is simple and reasonable, the stress is clear, the installation is convenient, and the replacement cost of the connecting structure at the anchorage position is low.
3. The invention provides a cable strand connecting structure, an anchorage structure and a construction method for replacing a main cable of a suspension bridge, wherein the original anchorage structure is improved into a new main cable anchorage structure on the basis of the original anchorage structure, the original anchorage structure can be used for bearing the anchorage force of the main cable in the construction process, and the original anchorage structure is dismantled after the new anchorage structure and the new main cable are installed, so that the traffic is not influenced in the construction process; and the operation of adjusting the line shape of the hanging cable of the new main cable is convenient, the old main cable is easy to remove, and the removing steps are simple and convenient.
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 invention adopts the cable strand connecting structure and the anchor structure to replace the anchor part of the main cable of the suspension bridge, in the installation process of the anchor connecting structure, the anchor connecting structure is installed on the basis of the continuous work of the original anchor structure, the anchor system of the suspension bridge is composed of a plurality of anchor structures, the original anchor structures are improved one by one in the installation process, and therefore, 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.
Drawings
FIG. 1 is a diagram: the invention discloses a schematic diagram of a cable strand connecting structure and an anchor structure for replacing a main cable of a suspension bridge.
FIG. 2 is a diagram of: the invention discloses a structural schematic diagram of a new strand connecting plate of an anchor structure for replacing a main cable of a suspension bridge.
FIG. 3 is a diagram of: the invention discloses a schematic diagram of a cable strand connecting structure and an anchor structure of an original pull rod for replacing a main cable of a suspension bridge.
FIG. 4 is a diagram of: the invention discloses a structural schematic diagram of a new strand connecting plate of an anchor structure of an original pull rod for replacing a main cable of a suspension bridge.
FIG. 5 is a diagram: the invention discloses an anchorage structure schematic diagram of a pressure-bearing type strand anchor head for replacing a main cable of a suspension bridge.
FIG. 6 is a diagram of: the invention discloses a structural schematic diagram of a new strand connecting plate of an anchor structure of a pressure-bearing type strand anchor head for replacing a main cable of a suspension bridge.
FIG. 7 is a diagram of: the invention discloses an anchorage structure schematic diagram of a thread adjusting strand anchor head for replacing a main cable of a suspension bridge.
FIG. 8 is a diagram of: the invention discloses a structural schematic diagram of a new strand connecting plate of an anchorage structure of a thread adjusting strand anchor head for replacing a main cable of a suspension bridge.
FIG. 9 is a diagram of: the invention discloses a structural schematic diagram of an original cable strand connecting plate of a suspension bridge.
In the figure:
1. original cable strand connecting plates; 11. an anchor head protective cover; 101. an original anchor head; 15. an anchor head of the pre-stressed anchor; 2. connecting plates of new cable strands; 20. a limit nut; 201. a new strand anchor head; 2011. a pressure-bearing type cable strand anchor head; 2012. adjusting the anchor head of the cable strand by screw threads; 2013. a third lock nut; 210. a first tie rod hole; 220. an anchor eye; 230. avoiding holes; 31. an original pull rod; 32. locking the pull rod; 33. a short pull rod; 34. a pull rod connecting sleeve; 41. a second pull rod; 410. and a second lock nut.
Detailed Description
The present invention will be described in detail below with reference to fig. 1 to 9 and the embodiments, and features in the following examples and examples may be combined with each other without conflict.
As shown in fig. 9, the original strand connection structure to be replaced in this embodiment includes an original strand connection plate 1, a prestressed anchorage device located at the lower end of the original strand connection plate 1, an original pull rod 31 penetrating through the original strand connection plate 1, and an original anchor head 101 connected to the original pull rod 31, the upper end surface of the original strand connection plate 1 is clamped to the anchor head 15 of the prestressed anchorage device, the prestressed anchorage device applies a downward pulling force to the original strand connection plate 1, the lower end of the original pull rod 31 penetrates through a pull rod hole in the original strand connection plate 1 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 original pull rod 31 is connected to the original anchor head 101, the original anchor head 101 is connected to an original main cable, the original pull rod 31 applies an upward pulling force to the original strand connection plate 1, so that the original strand connection plate 1 is in a balanced state during; in practical engineering, an anchor head protective cover 11 can be installed on the periphery of an anchor head 15 of the prestressed anchorage device and connected with an original cable strand connecting plate 1 through screws, and an original cable strand connecting cylinder is arranged at the lower end of the original cable strand connecting plate 1 and connected with the original cable strand connecting plate 1 through screws.
As shown in fig. 1 to 2, the present embodiment provides a suspension bridge strand connection structure, which is used in the construction of replacing main cables, wherein a new main cable is located above an old main cable, and the strand connection structure includes an original strand connection plate 1 and a new strand connection plate 2; the original cable strand connecting plate 1 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 2 is positioned above the original cable strand connecting plate 1 and is provided with a first pull rod hole 210 corresponding to the pull rod hole of the original cable strand connecting plate 1; the two ends of the new strand connecting plate 2 are positioned at the two sides of the original strand connecting plate 1, and are provided with anchor holes 220 for connecting a new main cable strand anchoring structure, wherein the angle of the anchor holes 220 is determined according to the erection position and the tensioning force of a new main cable, and is not limited herein; a limit nut 20 is arranged above the new cable strand connecting plate 2, and the limit nut 20 is in threaded connection with a first pull rod penetrating through a pull rod hole and a first pull rod hole 210;
the first pull rod can determine whether to replace the original pull rod 31 according to the use condition of the original pull rod 31, the first pull rod is used for replacing the original pull rod 31 in the embodiment, the first pull rod comprises a locking pull rod 32 with threads, a short pull rod 33 and a pull rod connecting sleeve 34, the threads are arranged at two ends of the locking pull rod 32, one end of the locking pull rod is connected with a first locking nut and clamped at the bottom end of the original cable strand connecting plate 1, the other end of the locking pull rod penetrates through a pull rod hole and the first pull rod hole 210 and is sequentially in threaded connection with a limiting nut 20 and the pull rod connecting sleeve 34, the other end of the pull rod connecting sleeve 34 is connected with one end of the short pull rod 33, and; in the structure of the embodiment, the new strand connecting plate 2 is pressed to the upper end face of the original strand connecting plate 1 through the limiting nut 20, so that the middle section of the new strand connecting plate 2 is provided with an avoiding hole 230 penetrating through the anchor head protective cover 11; the inner diameter of the avoiding hole 230 is larger than the outer diameter of the anchor head protection cover 11.
The anchorage structure adopting the cable strand connection structure of the embodiment further comprises a second pull rod 41 penetrating through the anchor hole 220, a new cable strand anchor head 201 connected with the top end of the second pull rod 41, and a second locking nut 410 connected with the bottom end of the second pull rod 41, wherein the second pull rod 41 is provided with a thread matched with the second locking nut 410; the new cable strand anchor head 201 is used for anchoring a new main cable strand; the second locking nut 410 is clamped at the bottom end of the anchor hole 220; the new strand connecting plate 2 limits the movement of the new strand connecting plate 2 in two directions through a limit nut 20 and a second locking nut 410 respectively. The construction method comprises the following steps:
A) 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;
A1) disassembling an original pull rod and components thereof, wherein the original pull rod component comprises a first locking nut, a washer and the like;
B) installing a new cable strand connecting plate and a limiting nut, and limiting the movement of the new cable strand connecting plate in a first direction (upward) through the limiting nut;
B1) installing a first pull rod and a component thereof;
C) connecting an original anchor head of the original main cable strand to a first pull rod (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);
C1) 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;
C2) connecting the other section of the short pull rod to the original anchor head;
D) the tension adjusting cable force is the same as the original cable force;
E) installing a new main cable strand anchoring structure and anchoring and connecting the new main cable strand anchoring structure with a new cable strand connecting plate through an anchor hole;
E1) a second pull rod is arranged at the anchor hole;
E2) installing a new cable strand anchor head at the top end of the second pull rod;
E3) a second locking nut is arranged at the bottom end of the second pull rod;
F) installing a new main cable strand and adjusting the line shape of the main cable to meet the design requirement;
G) and after the new main cable system is converted, removing the original main cable strand and the original anchor head.
In another embodiment, on the basis of the above embodiments, as shown in fig. 3 and 4, the first pull rod of the cable strand connection structure adopts an original pull rod 31 (or can be replaced by a new pull rod with a threaded section matched with a lock nut according to the use condition of the original pull rod 31), the original pull rod 31 is provided with a threaded section, and the limit nut 20 is connected with the threaded section of the original pull rod 31; the anchorage structure adopting the cable strand connecting structure in the embodiment further comprises a second pull rod 41 penetrating through the anchor hole 220, a new cable strand anchor head 201 connected with the top end of the second pull rod 41, and a second locking nut 410 connected with the bottom end of the second pull rod 41, wherein the second pull rod 41 is provided with a thread matched with the second locking nut 410, and the limit nut 20 and the second locking nut 410 in the embodiment respectively limit the upward and downward movement of the new cable strand connecting plate 2, so that the new cable strand connecting plate 2 is kept stable in the using process; the new cable strand anchor head 201 is used for anchoring a new main cable strand; the second locking nut 410 is clamped at the bottom end of the anchor hole 220; the construction method comprises the following steps:
A) 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 (in the scheme of replacing the original pull rod into a new pull rod with a threaded section, the original pull rod and components thereof need to be detached, and the new pull rod and components thereof need to be installed);
B) installing a new cable strand connecting plate and a limiting nut, sleeving the new cable strand connecting plate on the original pull rod, connecting the limiting nut with the original pull rod in a threaded manner, and limiting the movement of the new cable strand connecting plate in a first direction (upward) through the limiting nut;
C) connecting the original pull rod to the original anchor head of the original main cable strand;
D) the tension adjusting cable force is the same as the original cable force;
E) installing a new main cable strand anchoring structure and anchoring and connecting the new main cable strand anchoring structure with a new cable strand connecting plate through an anchor hole;
E1) a second pull rod is arranged at the anchor hole;
E2) installing a new cable strand anchor head at the top end of the second pull rod;
E3) a second locking nut is arranged at the bottom end of the second pull rod;
F) installing a new main cable strand and adjusting the line shape of the main cable to meet the design requirement;
G) and after the new main cable system is converted, removing the original main cable strand and the original anchor head.
In another embodiment, on the basis of the above embodiments, as shown in fig. 5 and 6, the anchor structure using the cable strand connection structure of the present embodiment further includes a pressure-bearing cable strand anchor head 2011 for anchoring a new main cable strand, the anchor hole 220 is opened toward one end close to the end of the new cable strand connection plate 2, the pressure-bearing cable strand anchor head 2011 is clamped at the bottom end of the anchor hole 220, the pressure-bearing cable strand anchor head 2011 is used for anchoring a new cable strand, and the new cable strand penetrates through the anchor hole 220 and is connected to the anchor head of the other cable strand; the construction method comprises the following steps:
A) 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;
A1) the original pull rod and the components thereof are disassembled;
B) installing a new strand connecting plate, a first pull rod (a locking pull rod, a short pull rod and a pull rod connecting sleeve) and components thereof and a limiting nut, and limiting the movement of the new strand connecting plate in a first direction through the limiting nut;
C) connecting an original pull rod to an original anchor head of an original main cable strand, wherein one end of the original pull rod is positioned at the bottom end of an original cable strand connecting plate and is anchored through a first locking nut, and the other end of the original pull rod penetrates through a pull rod hole and the first pull rod hole and is sequentially connected with a limiting nut and the original anchor head;
D) the tension adjusting cable force is the same as the original cable force;
E) installing a new main cable strand anchoring structure, and anchoring and connecting the new main cable strand anchoring structure with a new cable strand connecting plate through an anchor hole, specifically, installing a pressure-bearing type cable strand anchor head into the anchor hole from an end opening, in other embodiments, adjusting the length of a main cable by additionally arranging a U-shaped backing ring with a certain thickness between the new cable strand connecting plate and the pressure-bearing type cable strand anchor head, and adjusting the linear shape of the main cable to meet the design requirement;
F) installing a new main cable strand, wherein one end of the new main cable strand is connected with the anchor head of the pressure-bearing type cable strand, the other end of the new main cable strand penetrates through the anchor hole and is tensioned, and the line shape of the main cable is adjusted to meet the design requirement;
G) and after the new main cable system is converted, removing the original main cable strand and the original anchor head.
In another embodiment, on the basis of the above embodiments, as shown in fig. 7 and 8, the anchor structure using the cable strand connection structure of the present embodiment further includes a thread adjusting cable strand anchor head 2012 for anchoring a new main cable strand, one end of the thread adjusting cable strand anchor head 2012 penetrates through the anchor hole 220 and is in threaded connection with a third locking nut 2013, the third locking nut 2013 is fastened to the bottom end of the anchor hole 220, the thread adjusting cable strand anchor head 2012 is used for anchoring a new cable strand, and the new cable strand penetrates through the anchor hole 220 and is connected with the anchor head of the other cable strand; the construction method comprises the following steps:
A) 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;
A1) the original pull rod and the components thereof are disassembled;
B) installing a new strand connecting plate, a first pull rod (a locking pull rod, a short pull rod and a pull rod connecting sleeve) and components thereof and a limiting nut, and limiting the movement of the new strand connecting plate in a first direction through the limiting nut;
C) connecting an original pull rod to an original anchor head of an original main cable strand, wherein one end of the original pull rod is positioned at the bottom end of an original cable strand connecting plate and is anchored through a first locking nut, and the other end of the original pull rod penetrates through a pull rod hole and the first pull rod hole and is sequentially connected with a limiting nut and the original anchor head;
D) the tension adjusting cable force is the same as the original cable force;
E) installing a new main cable strand anchoring structure, and anchoring and connecting the new main cable strand anchoring structure with a new cable strand connecting plate through an anchor hole, wherein specifically, one end of an anchor head of a thread adjusting cable strand penetrates through the anchor hole and is connected with a third locking nut at the bottom end of the new cable strand connecting plate through a thread;
F) installing a new main cable strand, wherein one end of the new main cable strand is connected with the anchor head of the threaded adjusting cable strand, the other end of the new main cable strand penetrates through the anchor hole and is tensioned, and a third locking nut is clamped at the bottom end of the anchor hole and adjusts the line shape of the main cable strand to meet the design requirement;
G) and after the new main cable system is converted, removing the original main cable strand and the original anchor head.
The cable strand connecting structure, the anchorage structure and the construction method for replacing the main cable of the suspension bridge, provided by the invention, can ensure that a new main cable strand is safely and reliably connected with an original anchorage, can conveniently carry out conversion of a new main cable system and an old main cable system, and ensure that the main cable is safe, reliable, stable and durable during cable replacement and after cable replacement; the structure is simple and reasonable, the stress is clear, the installation is convenient, and the replacement cost of the connecting structure at the anchorage position is low; the original anchor structure is improved to be a new main cable anchor structure on the basis of the original anchor structure, the original anchor structure can be used for bearing the anchoring force of the main cable in the construction process, and the original anchor structure is dismantled after the new anchor structure and the new main cable are installed, so that traffic is not influenced in the construction process; and the operation of adjusting the line shape of the hanging cable of the new main cable is convenient, the old main cable is easy to remove, and the removing steps are simple and convenient.

Claims (9)

1. A cable strand connecting structure for replacing a main cable of a suspension bridge is characterized by comprising an original cable strand connecting plate (1) and a new cable strand connecting plate (2); the original cable strand connecting plate (1) 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 (2) is positioned above the original cable strand connecting plate (1) and is provided with a first pull rod hole (210) corresponding to the pull rod hole of the original cable strand connecting plate (1);
two ends of the new cable strand connecting plate (2) are positioned at two sides of the original cable strand connecting plate (1) and are provided with anchor holes (220) for connecting a new main cable strand anchoring structure;
and a limiting nut (20) is arranged above the new cable strand connecting plate (2), and the limiting nut (20) is in threaded connection with a first pull rod penetrating through the pull rod hole and the first pull rod hole (210).
2. The strand connecting structure for replacing a main cable of a suspension bridge according to claim 1, wherein the first pull rod comprises a locking pull rod (32) with threads, a short pull rod (33) and a pull rod connecting sleeve (34), and two ends of the pull rod connecting sleeve (34) are respectively connected with one ends of the locking pull rod (32) and the short pull rod (33); the other end of the locking pull rod (32) penetrates through the original cable strand connecting plate (1) and the new cable strand connecting plate (2) and is connected with the first locking nut through threads, and the limiting nut (20) is connected with the threaded section of the locking pull rod and is used for compressing the original cable strand connecting plate (1) and the new cable strand connecting plate (2); the other end of the short pull rod (33) is connected with the original anchor head (101).
3. The cable connection structure for replacing a main cable of a suspension bridge according to claim 1, wherein an anchor head protective cover (11) is connected to the upper end of the original cable connecting plate (1), and an avoidance hole (230) penetrating through the top surface of the new cable connecting plate (2) is formed in the middle section of the new cable connecting plate; the inner diameter of the avoiding hole (230) is larger than the outer diameter of the anchor head protective cover (11).
4. An anchorage structure for replacing a main cable of a suspension bridge, which is characterized by comprising the cable strand connecting structure of claims 1 to 3, and further comprising a second pull rod (41) penetrating through an anchor hole (220), a new cable strand anchor head (201) connected with the top end of the second pull rod (41), and a second locking nut (410) connected with the bottom end of the second pull rod (41), wherein the second pull rod (41) is provided with a thread matched with the second locking nut (410); the new cable strand anchor head (201) is used for anchoring a new main cable strand; the second locking nut (410) is clamped at the bottom end of the anchor hole (220).
5. An anchorage structure for replacing a main cable of a suspension bridge is characterized by comprising the cable strand connecting structure as claimed in claims 1 to 3 and further comprising a pressure-bearing type cable strand anchor head (2011) for anchoring a new main cable strand, wherein the anchor hole (220) is in a shape of opening towards one end of a new cable strand connecting plate (2), and the pressure-bearing type cable strand anchor head (2011) is clamped at the bottom end of the anchor hole (220).
6. An anchorage structure for replacing a main cable of a suspension bridge, which is characterized by comprising the cable strand connecting structure as claimed in claims 1 to 3, and further comprising a thread adjusting cable strand anchor head (2012) and a third locking nut (2013) for anchoring a new main cable strand, wherein one end of the thread adjusting cable strand anchor head (2012) penetrates through an anchor hole (220) and is in threaded connection with the third locking nut (2013), and the third locking nut (2013) is clamped at the bottom end of the anchor hole (220).
7. A construction method of an anchorage structure for replacing a main cable of a suspension bridge is characterized by comprising the anchorage structure of claims 4 to 6, and comprises the following steps:
A) 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;
B) 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;
C) connecting an original anchor head of an original main cable strand to a first pull rod;
D) the tension adjusting cable force is the same as the original cable force;
E) installing a new main cable strand anchoring structure and anchoring and connecting the new main cable strand anchoring structure with a new cable strand connecting plate through an anchor hole;
F) installing a new main cable strand and adjusting the line shape of the main cable to meet the design requirement;
G) and after the new main cable system is converted, removing the original main cable strand and the original anchor head.
8. The construction method of the anchorage structure for replacing the main cable of the suspension bridge as claimed in claim 7, wherein when the first pull rod comprises a locking pull rod, a short pull rod and a pull rod connecting sleeve, the step A further comprises:
A1) the original pull rod and the components thereof are disassembled;
the step B also comprises the following steps:
B1) installing a first pull rod and a component thereof;
step C also includes:
C1) 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;
C2) the other section of the short tie rod is connected to the original anchor head.
9. The construction method of an anchorage structure for replacing a main cable of a suspension bridge according to claim 7, wherein the step E further comprises:
E1) a second pull rod is arranged at the anchor hole;
E2) installing a new cable strand anchor head at the top end of the second pull rod;
E3) and a second locking nut is arranged at the bottom end of the second pull rod.
CN201911159397.8A 2019-11-22 2019-11-22 Cable strand connecting structure for replacing main cable of suspension bridge, anchorage structure and construction method Pending CN110820525A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201911159397.8A CN110820525A (en) 2019-11-22 2019-11-22 Cable strand connecting structure for replacing main cable of suspension bridge, anchorage structure and construction method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201911159397.8A CN110820525A (en) 2019-11-22 2019-11-22 Cable strand connecting structure for replacing main cable of suspension bridge, anchorage structure and construction method

Publications (1)

Publication Number Publication Date
CN110820525A true CN110820525A (en) 2020-02-21

Family

ID=69558505

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201911159397.8A Pending CN110820525A (en) 2019-11-22 2019-11-22 Cable strand connecting structure for replacing main cable of suspension bridge, anchorage structure and construction method

Country Status (1)

Country Link
CN (1) CN110820525A (en)

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