Cable strand connection structure, anchorage structure and construction method for replacing main cable of suspension bridge

Abstract

The present invention discloses a cable strand connection structure, an anchoring structure and a construction method for replacing the main cable of a suspension bridge. The cable strand connection structure includes an original cable strand connection plate and a new cable strand connection plate; the original cable strand connection plate is provided with a tie rod hole penetrating the upper and lower end surfaces thereof; the middle section of the new cable strand connection plate is located above the original cable strand connection plate, and is provided with a first tie rod hole corresponding to the tie rod hole of the original cable strand connection plate; the two ends of the new cable strand connection plate are located on both sides of the original cable strand connection plate, and are provided with anchor holes for connecting the anchoring structure of the new main cable strand; a limiting nut is provided above the new cable strand connection plate, and the limiting nut is connected to the first tie rod penetrating the tie rod hole and the first tie rod hole by threading. The cable strand connection structure, anchoring structure and construction method for replacing the main cable of a suspension bridge disclosed by the present invention can safely and reliably connect the new cable strand connection plate with the original cable strand connection plate, and can facilitate the system conversion of the new main cable and the original main cable, and will not affect normal traffic during the construction process.

Description

Technical Field

[0001] The invention relates to an anchoring structure, in particular to a cable strand connection structure, an anchoring structure and a construction method for replacing a main cable of a suspension bridge. Background Art

[0002] As the bridge with the largest span capacity, suspension bridge has been developed rapidly in my country. The main cable, which is the lifeline of suspension bridge, has always been the main research topic of engineering and technical personnel in various countries in the world. In particular, the research on the anti-corrosion of the main cable is particularly important, because if the cable system is corroded, the consequences are unimaginable. In order to ensure the safety of the bridge and the cable structure, the cable must be protected from corrosion. However, the research on the anti-corrosion of the main cable of the suspension bridge has not yet achieved satisfactory results. Therefore, many bridge cables still rely on the replacement of cables to solve the corrosion and safety performance problems of bridge cables. In the structural system of the suspension bridge, there are cable clamps for the use of replaceable main cables on newly built small suspension bridges. Only after using the cable clamps can the main cables of the suspension bridge be replaced. In the anchorage system, the anchorage problem of the new main cable is solved by building a new anchorage system. At present, there is no anchorage structure and method for the anchorage of the new main cable in the replacement construction of the main cable of the large and completed suspension bridge, which is improved on the basis of the original anchorage structure. Summary of the invention

[0003] In view of the above problems, the present invention provides a cable strand connection structure, an anchoring structure and a construction method for replacing the main cable of a suspension bridge, aiming to solve the problems of how to improve the anchoring structure for anchoring the new main cable based on the original anchoring structure during the construction of replacing the main cable; and how to replace the main cable, sling and improve the anchoring structure without affecting traffic.

[0004] The present invention adopts the following technical solutions to achieve the above purpose:

[0005] A cable strand connection structure for replacing the main cable of a suspension bridge comprises an original cable strand connection plate and a new cable strand connection plate; the original cable strand connection plate is provided with a tie rod hole penetrating the upper and lower end surfaces thereof; the middle section of the new cable strand connection plate is located above the original cable strand connection plate and is provided with a first tie rod hole corresponding to the tie rod hole of the original cable strand connection plate; the two ends of the new cable strand connection plate are located on both sides of the original cable strand connection plate and are provided with anchor holes for connecting to an anchoring structure of a new main cable strand; a limiting nut is provided above the new cable strand connection plate, and the limiting nut is threadedly connected to the first tie rod penetrating the tie rod hole and the first tie rod hole. The cable strand connection structure of the present technical solution can connect the new cable strand connection plate and the original cable strand connection plate safely and reliably, and can facilitate the system conversion between the new main cable and the original main cable, ensuring that the main cable is safe, reliable, stable and durable during and after the cable replacement; the original anchoring structure is improved to a new main cable anchoring structure on the basis of the original anchoring structure, and the original anchoring structure can be used to bear the anchoring force of the main cable during the construction process. After the new anchoring structure and the new main cable are installed, the original anchoring structure is removed, so the traffic is not affected during the construction process; the new main cable hanging rope is easy to adjust the linear operation, the old main cable is easy to remove, and the removal steps are simple and convenient.

[0006] Its further technical solution is that the first tie rod includes a locking tie rod with threads, a short tie rod, and a tie rod connecting sleeve, the two ends of the tie rod connecting sleeve are respectively connected to one end of the locking tie rod and the short tie rod; the other end of the locking tie rod passes through the original cable strand connecting plate and the new cable strand connecting plate, and is connected to the first locking nut through a thread, the limit nut is connected to the locking tie rod threaded section, and is used to compress the original cable strand connecting plate and the new cable strand connecting plate; the other end of the short tie rod is connected to the original cable strand anchor head. This technical solution seamlessly connects the original cable strand connecting plate and the new cable strand connecting plate by adding a locking tie rod, and can be used in bridge projects with larger cable forces.

[0007] A further technical solution is that the upper end of the original cable strand connecting plate is connected to an anchor head protection cover, and the middle section of the new cable strand connecting plate is provided with an avoidance hole running through its top surface; the inner diameter of the avoidance hole is larger than the outer diameter of the anchor head protection cover.

[0008] A further technical solution is that the limit nut is a Haversian structure.

[0009] Its further technical solution is an anchoring structure for replacing the main cable of a suspension bridge, comprising the above-mentioned cable strand connection structure, and also comprising a second pull rod passing through the anchor hole, a new cable strand anchor head connected to the top end of the second pull rod, and a second locking nut connected to the bottom end of the second pull rod, wherein the second pull rod is provided with a thread matching the second locking nut; the new cable strand anchor head is used for anchoring the new main cable strand; and the second locking nut is stuck in the bottom end of the anchor hole.

[0010] A further technical solution is an anchoring structure for replacing the main cable of a suspension bridge, comprising the above-mentioned cable strand connection structure, and also comprising a pressure-bearing cable strand anchor head for anchoring the new main cable strand, wherein the anchor hole is in a shape opening toward one end of the new cable strand connection plate, and the pressure-bearing cable strand anchor head is stuck at the bottom end of the anchor hole.

[0011] Its further technical solution is an anchoring structure for replacing the main cable of a suspension bridge, including the above-mentioned cable strand connection structure, and also including a threaded adjustment cable strand anchor head and a third locking nut for anchoring the new main cable strand. One end of the threaded adjustment cable strand anchor head passes through the anchor hole and is threadedly connected to the third locking nut, and the third locking nut is clamped at the bottom end of the anchor hole.

[0012] A method for constructing an anchorage structure for replacing a main cable of a suspension bridge, comprising the above-mentioned anchorage structure, comprises the following steps:

[0013] A) Measure the cable force of the original main cable strand on the original cable strand connection plate, and then remove the original main cable strand;

[0014] B) installing a new cable strand connection plate and a limit nut, and limiting the movement of the cable strand in the first direction by the limit nut;

[0015] C) connecting the original anchor head of the original main cable strand to the first tension rod;

[0016] D) The tensioning adjustment cable force is the same as the original cable force;

[0017] E) Install the new main cable strand anchoring structure and connect it to the new cable strand connecting plate through anchor holes;

[0018] F) Install new main cable strands and adjust the main cable shape to the design requirements;

[0019] G) After the new main cable system is converted, remove the original main cable strands and anchor heads.

[0020] A further technical solution is that when the first pull rod includes a locking pull rod, a short pull rod, and a pull rod connecting sleeve, step A further includes:

[0021] A1) Remove the original tie rod and its components;

[0022] Step B also includes:

[0023] B1) Installing the first tie rod and its components;

[0024] Step C also includes:

[0025] C1) Install a short pull rod on the upper end of the locking pull rod and connect it to one end of the short pull rod through a pull rod connecting sleeve;

[0026] C2) Connect the other end of the short tie rod to the original anchor head.

[0027] A further technical solution is that step E further comprises:

[0028] E1) Install the second tie rod at the anchor hole;

[0029] E2) Install a new cable anchor head at the top of the second tie rod;

[0030] E3) Install the second locking nut at the bottom end of the second tie rod.

[0031] The beneficial effects of the present invention are:

[0032] 1. The cable strand connection structure, anchor structure and construction method for replacing the main cable of a suspension bridge provided by the present invention can connect the new main cable strand to the original anchor safely and reliably, facilitate the conversion of the new and old main cable systems, and ensure that the main cable is safe, reliable, stable and durable during and after the cable replacement.

[0033] 2. The cable strand connection structure, anchorage structure and construction method for replacing the main cable of a suspension bridge provided by the present invention have a simple and reasonable structure at the anchorage for replacing the main cable of the suspension bridge, clear force, easy installation, and low cost for replacing the connection structure at the anchorage.

[0034] 3. The cable strand connection structure, anchoring structure and construction method for replacing the main cable of a suspension bridge provided by the present invention are improved upon the original anchoring structure to form a new main cable anchoring structure. During the construction process, the original anchoring structure can be used to bear the anchoring force of the main cable. After the new anchoring structure and the new main cable are installed, the original anchoring structure is removed. Therefore, traffic is not affected during the construction process. Moreover, the new main cable hanging cable can be conveniently adjusted in line shape, and the old main cable can be easily removed, and the removal steps are simple and convenient.

[0035] The working principle of the present invention is:

[0036] The middle section of the main cable of the existing suspension bridge is connected to the beam end through a sling structure, and the two ends pass through the main cable saddle at the top of the tower, and then pass through the loose cable saddle respectively. The loose cable saddle changes the force transmission direction of the main cable and disperses the main cable into many strands, which are anchored on the corresponding anchoring structures. The present invention adopts the above-mentioned strand connection structure and anchoring structure to replace the anchoring part of the main cable of the suspension bridge. During the installation process of the anchoring connection structure, the anchoring connection structure is installed on the basis of the continuous operation of the original anchoring structure. The anchoring system of the suspension bridge is composed of many anchoring structures described in the present invention. During the installation process, the original anchoring structures are improved one by one, so the overall use function of the anchoring system of the suspension bridge and the overall stress condition of the original main cable are not affected. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 Schematic diagram of the cable strand connection structure and anchor structure for replacing the main cable of the suspension bridge according to the present invention.

[0038] Figure 2: A schematic structural diagram of a new cable strand connecting plate of an anchoring structure for replacing a main cable of a suspension bridge according to the present invention.

[0039] Figure 3 The present invention is a schematic diagram of the cable strand connection structure and anchor structure of the original pull rod for replacing the main cable of the suspension bridge.

[0040] Figure 4 It is a schematic diagram of the new cable strand connecting plate structure of the anchoring structure for replacing the original pull rod for the main cable of the suspension bridge according to the present invention.

[0041] Figure 5 The present invention is a schematic diagram of the anchoring structure of the pressure-bearing cable strand anchor head for replacing the main cable of the suspension bridge.

[0042] Figure 6 The present invention is a schematic diagram of a new cable strand connecting plate structure of an anchoring structure for replacing a pressure-bearing cable strand anchor head for a main cable of a suspension bridge.

[0043] Figure 7 The present invention is a schematic diagram of the anchoring structure of the threaded adjustable cable strand anchor head for replacing the main cable of the suspension bridge.

[0044] Figure 8 The present invention is a schematic diagram of a new cable strand connecting plate structure of an anchoring structure for replacing a main cable of a suspension bridge with a threaded adjustable cable strand anchor head.

[0045] Fig. 9 Schematic diagram of the original cable strand connecting plate structure of a suspension bridge according to the present invention.

[0046] In the figure:

[0047] 1. Original cable strand connection plate; 11. Anchor head protection cover; 101. Original anchor head; 15. Anchor head of prestressed anchor; 2. New cable strand connection plate; 20. Limit nut; 201. New cable strand anchor head; 2011. Pressure-bearing cable strand anchor head; 2012. Threaded adjustment cable strand anchor head; 2013. Third locking nut; 210. First tie rod hole; 220. Anchor hole; 230. Avoidance hole; 31. Original tie rod; 32. Locking tie rod; 33. Short tie rod; 34. Tie rod connecting sleeve; 41. Second tie rod; 410. Second locking nut. DETAILED DESCRIPTION

[0048] The following is combined with Figures 1 to 9 The present invention is described in detail with specific implementation modes. In the absence of conflict, the following embodiments and features in the embodiments may be combined with each other.

[0049] like Fig. 9As shown, the original cable strand connection structure to be replaced in this embodiment includes an original cable strand connection plate 1, a prestressed anchor at the lower end thereof, an original tension rod 31 penetrating the original cable strand connection plate 1, and an original anchor head 101 connected to the original tension rod 31. The upper end surface of the original cable strand connection plate 1 is clamped to the anchor head 15 of the prestressed anchor. The prestressed anchor applies downward tension to the original cable strand connection plate 1. The lower end of the original tension rod 31 penetrates the tension rod hole on the original cable strand connection plate 1 and is connected to a nut. The nut is clamped to the tension rod hole. At the lower end face of the rod hole, the upper end of the original tension rod 31 is connected to the original anchor head 101, and the original anchor head 101 is connected to the original main cable. The original tension rod 31 applies an upward pulling force to the original cable strand connecting plate 1, so the original cable strand connecting plate 1 is in a balanced state during use. In actual engineering, an anchor head protection cover 11 can be installed on the periphery of the anchor head 15 of the prestressed anchor, and connected to the original cable strand connecting plate 1 by screws. The original cable strand connecting tube is at the lower end of the original cable strand connecting plate 1, and is connected to the original cable strand connecting plate 1 by screws.

[0050] like Figure 1 to Figure 2 As shown, this embodiment provides a cable strand connection structure of a suspension bridge. The cable strand connection structure described in this embodiment is used in the construction of main cable replacement. The new main cable is located above the old main cable. The cable strand connection structure includes an original cable strand connection plate 1 and a new cable strand connection plate 2. The original cable strand connection plate 1 is provided with a tie rod hole passing through its upper and lower end surfaces. The middle section of the new cable strand connection plate 2 is located above the original cable strand connection plate 1 and is provided with a first tie rod hole 210 corresponding to the tie rod hole of the original cable strand connection plate 1. The two ends of the new cable strand connection plate 2 are located on both sides of the original cable strand connection plate 1 and are provided with anchor holes 220 for connecting the anchoring structure of the new main cable strand, wherein the angle of the anchor hole 220 is determined according to the installation position and tensioning strength of the new main cable, which is not limited here. A limiting nut 20 is provided above the new cable strand connection plate 2, and the limiting nut 20 is threadedly connected to the first tie rod passing through the tie rod hole and the first tie rod hole 210.

[0051] Among them, the first pull rod can be determined whether to be replaced according to the usage of the original pull rod 31. The present embodiment adopts the first pull rod for replacing the original pull rod 31. The first pull rod includes a locking pull rod 32 with a thread, a short pull rod 33 and a pull rod connecting sleeve 34. The locking pull rod 32 is provided with threads at both ends, one end is connected with the first locking nut and is stuck in the bottom end of the original cable strand connecting plate 1, and the other end passes through the pull rod hole and the first pull rod hole 210, and is threadedly connected with the limit nut 20 and the pull rod connecting sleeve 34 in turn. The other end of the pull rod connecting sleeve 34 is connected to one end of the short pull rod 33, and the other end of the short pull rod 33 is connected to the original anchor head 101; in the structure of the present embodiment, the new cable strand connecting plate 2 is pressed to the upper end surface of the original cable strand connecting plate 1 by the limit nut 20, so the middle section of the new cable strand connecting plate 2 is provided with an avoidance hole 230 that passes through the anchor head protection cover 11; the inner diameter of the avoidance hole 230 is larger than the outer diameter of the anchor head protection cover 11.

[0052] The anchoring structure using the cable strand connection structure of this embodiment also includes a second tie rod 41 passing through the anchor hole 220, a new cable strand anchor head 201 connected to the top of the second tie rod 41, and a second locking nut 410 connected to the bottom of the second tie rod 41. The second tie rod 41 is provided with a thread that matches the second locking nut 410; the new cable strand anchor head 201 is used to anchor the new main cable strand; the second locking nut 410 is stuck at the bottom of the anchor hole 220; the new cable strand connection plate 2 is limited by the limit nut 20 and the second locking nut 410 to limit the movement of the new cable strand connection plate 2 in two directions. The construction method includes the following steps:

[0053] A) Measure the cable force of the original main cable strand on the original cable strand connection plate, and then remove the original main cable strand, that is, remove the original anchor head together with the original main cable strand from the original pull rod;

[0054] A1) Remove the original tie rod and its components, where the original tie rod components include the first locking nut and washer, etc.;

[0055] B) installing a new cable strand connecting plate and a limit nut, and limiting the movement of the new cable strand connecting plate in a first direction (upward) by the limit nut;

[0056] B1) Installing the first tie rod and its components;

[0057] C) connecting the original anchor head of the original main cable strand to the first pull rod (at this time, one end of the original anchor head is connected to the first pull rod, and the other end is connected to the original main cable strand);

[0058] C1) Install a short pull rod on the upper end of the locking pull rod and connect it to one end of the short pull rod through a pull rod connecting sleeve;

[0059] C2) Connect the other end of the short tie rod to the original anchor head;

[0060] D) The tensioning adjustment cable force is the same as the original cable force;

[0061] E) Install the new main cable strand anchoring structure and connect it to the new cable strand connecting plate through anchor holes;

[0062] E1) Install the second tie rod at the anchor hole;

[0063] E2) Install a new cable anchor head at the top of the second tie rod;

[0064] E3) Installing a second locking nut at the bottom end of the second tie rod;

[0065] F) Install new main cable strands and adjust the main cable shape to the design requirements;

[0066] G) After the new main cable system is converted, remove the original main cable strands and anchor heads.

[0067] Another implementation mode, based on the above implementation mode, is as follows Figure 3 , Figure 4 As shown, the first tie rod of the cable strand connection structure adopts the original tie rod 31 (it can also be replaced with a new tie rod with a threaded section that cooperates with the locking nut according to the use of the original tie rod 31), the original tie rod 31 is provided with a threaded section, and the limit nut 20 is connected to the threaded section of the original tie rod 31; the anchoring structure using the cable strand connection structure of this embodiment also includes a second tie rod 41 passing through the anchor hole 220, a new cable strand anchor head 201 connected to the top of the second tie rod 41, and a second locking nut 410 connected to the bottom end of the second tie rod 41, the second tie rod 41 is provided with a thread that cooperates with the second locking nut 410, the limit nut 20 and the second locking nut 410 in this embodiment respectively limit the new cable strand connection plate 2 to move upward and downward, so the new cable strand connection plate 2 remains stable during use; the new cable strand anchor head 201 is used to anchor the new main cable strand; the second locking nut 410 is stuck at the bottom end of the anchor hole 220; the construction method includes the following steps:

[0068] A) Measure the cable force of the original main cable strand on the original cable strand connection plate, and then remove the original main cable strand, that is, remove the original anchor head together with the original main cable strand from the original tie rod (in the scheme of replacing the original tie rod with a new tie rod with a threaded section, it is necessary to remove the original tie rod and its components, and install the new tie rod and its components);

[0069] B) installing a new cable strand connection plate and a limit nut, sleeve the new cable strand connection plate onto the original pull rod, and thread the limit nut into the original pull rod, so that the limit nut limits the movement of the new cable strand connection plate in the first direction (upward);

[0070] C) Connect the original tension rod to the original anchor head of the original main cable strand;

[0071] D) The tensioning adjustment cable force is the same as the original cable force;

[0072] E) Install the new main cable strand anchoring structure and connect it to the new cable strand connecting plate through anchor holes;

[0073] E1) Install the second tie rod at the anchor hole;

[0074] E2) Install a new cable anchor head at the top of the second tie rod;

[0075] E3) Installing a second locking nut at the bottom end of the second tie rod;

[0076] F) Install new main cable strands and adjust the main cable shape to the design requirements;

[0077] G) After the new main cable system is converted, remove the original main cable strands and anchor heads.

[0078] Another implementation mode, based on the above implementation mode, is as follows Figure 5 , Figure 6As shown, the anchoring structure using the cable strand connection structure of this embodiment further includes a pressure-bearing cable strand anchor head 2011 for anchoring the new main cable strand, the anchor hole 220 is open to one end close to the end of the new cable strand connection plate 2, the pressure-bearing cable strand anchor head 2011 is stuck at the bottom end of the anchor hole 220, the pressure-bearing cable strand anchor head 2011 is used to anchor the new cable strand, and the new cable strand passes through the anchor hole 220 and is connected to the cable strand anchor head at the other end; the construction method includes the following steps:

[0079] A) Measure the cable force of the original main cable strand on the original cable strand connection plate, and then remove the original main cable strand, that is, remove the original anchor head together with the original main cable strand from the original pull rod;

[0080] A1) Remove the original tie rod and its components;

[0081] B) installing a new cable strand connecting plate, a first tie rod (locking tie rod, short tie rod and tie rod connecting sleeve) and its components and a limit nut, and limiting the movement of the first direction thereof by the limit nut;

[0082] C) connecting the original tie rod to the original anchor head of the original main cable strand, specifically, one end of the original tie rod is located at the bottom end of the original cable strand connecting plate and is anchored by a first locking nut, and the other end passes through the tie rod hole and the first tie rod hole and is connected to the limit nut and the original anchor head in sequence;

[0083] D) The tensioning adjustment cable force is the same as the original cable force;

[0084] E) installing a new main cable strand anchoring structure and anchoring it to the new cable strand connection plate through an anchor hole. Specifically, inserting a pressure-bearing cable strand anchor head into the anchor hole from the end opening. In other embodiments, a U-shaped gasket ring of a certain thickness may be added between the new cable strand connection plate and the pressure-bearing cable strand anchor head to adjust the main cable length and adjust the main cable line shape to the design requirements;

[0085] F) Install the new main cable strand. One end of the new main cable strand is connected to the pressure-bearing cable strand anchor head, and the other end passes through the anchor hole and is tightened. The main cable line shape is adjusted to the design requirements;

[0086] G) After the new main cable system is converted, remove the original main cable strands and anchor heads.

[0087] Another implementation mode, based on the above implementation mode, is as follows Figure 7 , Figure 8 As shown, the anchoring structure using the cable strand connection structure of this embodiment further includes a threaded cable strand anchor head 2012 for anchoring a new main cable strand, one end of the threaded cable strand anchor head 2012 passes through the anchor hole 220 and is threadedly connected to a third locking nut 2013, the third locking nut 2013 is clamped at the bottom end of the anchor hole 220, the threaded cable strand anchor head 2012 is used to anchor a new cable strand, and the new cable strand passes through the anchor hole 220 and is connected to the cable strand anchor head at the other end; the construction method includes the following steps:

[0088] A) Measure the cable force of the original main cable strand on the original cable strand connection plate, and then remove the original main cable strand, that is, remove the original anchor head together with the original main cable strand from the original pull rod;

[0089] A1) Remove the original tie rod and its components;

[0090] B) installing a new cable strand connecting plate, a first tie rod (locking tie rod, short tie rod and tie rod connecting sleeve) and its components and a limit nut, and limiting the movement of the first direction thereof by the limit nut;

[0091] C) connecting the original tie rod to the original anchor head of the original main cable strand, specifically, one end of the original tie rod is located at the bottom end of the original cable strand connecting plate and is anchored by a first locking nut, and the other end passes through the tie rod hole and the first tie rod hole and is connected to the limit nut and the original anchor head in sequence;

[0092] D) The tensioning adjustment cable force is the same as the original cable force;

[0093] E) installing a new main cable strand anchoring structure and anchoring it to the new cable strand connecting plate through an anchor hole. Specifically, one end of the threaded adjustment cable strand anchor head passes through the anchor hole and is threadedly connected to the third locking nut at the bottom end of the new cable strand connecting plate;

[0094] F) Install the new main cable strand. One end of the new main cable strand is connected to the threaded adjustment strand anchor head. The other end passes through the anchor hole and is tightened. The third locking nut is clamped at the bottom of the anchor hole, and the main cable line shape is adjusted to the design requirements.

[0095] G) After the new main cable system is converted, remove the original main cable strands and anchor heads.

[0096] The cable strand connection structure, anchoring structure and construction method for replacing the main cable of a suspension bridge provided by the present invention can connect the new main cable strand to the original anchoring safely and reliably, and can facilitate the conversion of the new and old main cable systems, ensuring that the main cable is safe, reliable, stable and durable during and after the cable replacement; the structure is simple and reasonable, the force is clear, the installation is convenient, and the replacement cost of the connection structure at the anchoring is low; the original anchoring structure is improved to a new main cable anchoring structure, and the original anchoring structure can be used to bear the anchoring force of the main cable during the construction process, and after the new anchoring structure and the new main cable are installed, the original anchoring structure is removed, so that the traffic is not affected during the construction process; and the new main cable hanging cable is easy to adjust the linear operation, the old main cable is easy to remove, and the removal steps are simple and convenient.

Claims

1. A cable strand connection structure for replacing a main cable of a suspension bridge, characterized in that: It comprises an original cable strand connection plate (1) and a new cable strand connection plate (2); the original cable strand connection plate (1) is provided with a pull rod hole penetrating the upper and lower end surfaces thereof; The middle section of the new cable strand connection plate (2) is located above the original cable strand connection plate (1) and is provided with a first tie rod hole (210) corresponding to the tie rod hole of the original cable strand connection plate (1); The two ends of the new cable strand connection plate (2) are located on both sides of the original cable strand connection plate (1), and are provided with anchor holes (220) for connecting to the anchoring structure of the new main cable strand; A limiting nut (20) is provided above the new cable strand connection plate (2), and the limiting nut (20) is connected to a first pull rod passing through the pull rod hole and the first pull rod hole (210) through a thread; the first pull rod comprises a locking pull rod (32) with a thread, 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 to one end of the locking pull rod (32) and the short pull rod (33); the other end of the locking pull rod (32) passes through the original cable strand connection plate (1), a new cable strand connecting plate (2), and connected to the first locking nut through a thread, the limit nut (20) is connected to the threaded section of the locking pull rod, and is used to press 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 to the original anchor head (101); the upper end of the original cable strand connecting plate (1) is connected to an anchor head protection cover, and the middle section of the new cable strand connecting plate (2) is provided with an avoidance hole penetrating the top surface thereof; the inner diameter of the avoidance hole is larger than the outer diameter of the anchor head protection cover.

2. An anchorage structure for replacing the main cable of a suspension bridge, characterized in that: The invention comprises the cable strand connection structure as claimed in claim 1, and further comprises a second pull rod (41) passing through the anchor hole (220), a new cable strand anchor head (201) connected to the top end of the second pull rod (41), and a second locking nut (410) connected to the bottom end of the second pull rod (41), wherein the second pull rod (41) is provided with a thread matching with the second locking nut (410); the new cable strand anchor head (201) is used for anchoring a new main cable strand; and the second locking nut (410) is clamped at the bottom end of the anchor hole (220).

3. An anchorage structure for replacing the main cable of a suspension bridge, characterized in that: It comprises the cable strand connection structure as claimed in claim 1, and also comprises a pressure-bearing cable strand anchor head (2011) for anchoring a new main cable strand, the anchor hole (220) is in a shape opening toward one end of the new cable strand connection plate (2), and the pressure-bearing cable strand anchor head (2011) is clamped at the bottom end of the anchor hole (220).

4. An anchorage structure for replacing the main cable of a suspension bridge, characterized in that: The invention comprises the cable strand connection structure as claimed in claim 1, and further comprises a threaded cable strand anchor head (2012) and a third locking nut (2013) for anchoring a new main cable strand, wherein one end of the threaded cable strand anchor head (2012) passes through the anchor hole (220) and is threadedly connected to the third locking nut (2013), and the third locking nut (2013) is clamped at the bottom end of the anchor hole (220).

5. A method for constructing an anchorage structure for replacing a main cable of a suspension bridge, characterized in that: The anchoring structure according to any one of claims 2 to 4 comprises the following steps: A) Measure the cable force of the original main cable strand on the original cable strand connection plate, and then remove the original main cable strand; B) Install the new cable strand connection plate and limit nut to limit the movement in the first direction; C) connecting the original anchor head of the original main cable strand to the first tie rod; D) The tensioning adjustment cable force is the same as the original cable force; E) Install the new main cable strand anchorage structure and connect it to the new cable strand connection plate through anchor holes; F) Install new main cable strands and adjust the main cable shape to the design requirements; G) After the new main cable system is converted, remove the original main cable strands and anchor heads.

6. The method for constructing an anchorage structure for replacing a main cable of a suspension bridge according to claim 5, characterized in that: When the first pull rod includes a locking pull rod, a short pull rod, and a pull rod connecting sleeve, step A further includes: A1) Remove the original tie rod and its components; Step B also includes: B1) Installing the first tie rod and its components; Step C also includes: C1) Install a short pull rod on the upper end of the locking pull rod and connect it to one end of the short pull rod through a pull rod connecting sleeve; C2) Connect the other end of the short tie rod to the original anchor head.

7. The method for constructing an anchorage structure for replacing a main cable of a suspension bridge according to claim 5, characterized in that: in, Step E also includes: E1) Install the second tie rod at the anchor hole; E2) Install a new cable anchor head at the top of the second tie rod; E3) Install the second locking nut at the bottom end of the second tie rod.

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