Main cable quick traction method and system

Abstract

The application discloses a kind of main cable quick traction method and system, method includes in starting bank tunnel anchor hole mouth platform arrangement traction winch and main cable traction cable, in two banks tunnel anchor inside layout hole inside traction system, complete traction system erection: cable drum is set to starting bank tunnel anchor hole mouth catwalk side, cable strand is turned into catwalk by steering wheel, using intelligent puller to carry out cable strand traction, to terminal bank tunnel anchor;With main traction system, carry out hole inside main cable through section secondary pull traction, again using terminal bank hole inside traction system to carry out hole inside relay traction, cable strand anchor head is pulled to terminal bank anchor plug body front anchor face and temporarily anchored;Utilize tower crane, caterpillar crane and truck crane cooperation to carry out cable drum cable, cable on cable drum cable strand cable head moves out;Using starting bank hole inside traction system, cable strand cable head is pulled to anchor plug body front anchor face and temporarily anchored to complete traction;The application is optimized by traction system component and layout, simplifies traction system structure, improves main cable strand traction efficiency.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of suspension bridge construction, and more particularly relates to a main cable rapid traction method and system. BACKGROUND

[0002] In the field of bridge construction, especially in the construction process of long-span suspension bridges, the erection of main cable strands is one of the key links. As the main load-bearing structure of suspension bridges, the erection precision and efficiency of main cable strands directly affect the overall quality and construction period of the bridge. The main cable strand erection mainly adopts the parallel wire strand (PPWS) method, and the traction system is the core equipment for realizing the erection of the strand. In the prior art, the main cable rapid traction system is widely used, which realizes the reciprocating traction of the strand through two traction ropes and a winch. For example, the patent document with the application number CN202311044578.2 provides a reciprocating traction system, which includes two sets of longitudinal main cable rapid traction systems and one set of horizontal main cable rapid traction system arranged on one side of the anchorage; the two longitudinal main cable rapid traction systems are arranged on the upstream side and the downstream side respectively, and the horizontal main cable rapid traction system is connected at one end of the two longitudinal main cable rapid traction systems; the horizontal main cable rapid traction system includes a first drag channel, a second drag channel, a first horizontal traction mechanism, a second horizontal traction mechanism, and a horizontal traction machine; the first drag channel and the second drag channel are arranged staggered; the invention can realize the turning of the main cable strand without the tower crane, reducing the engineering period and labor cost increased by the tower crane, and the tonnage requirement of the horizontal traction machine for the horizontal traction of the main cable strand is low, which can reduce the equipment investment cost; the method of the invention can realize the simultaneous turning and traction of two main cable strands, improving the traction efficiency. However, the invention adopts two sets of longitudinal main cable rapid traction systems and one set of horizontal main cable rapid traction system, which has a relatively complex structure and is cumbersome to operate, affecting the traction efficiency, and the installation and maintenance cost is high. SUMMARY

[0003] In view of the above defects or improvement needs of the prior art, the present application provides a main cable rapid traction method and system, which optimizes the main traction system and the components and layout of the hole-in traction system, simplifies the structure of the traction system, improves the traction efficiency of the main cable strand, reduces the construction time and cost, and at the same time ensures the safety and reliability of the construction.

[0004] To achieve the above-mentioned purpose, according to one aspect of the present application, the present application provides a main cable rapid traction method, characterized in that it comprises the following specific steps:

[0005] S100: Arrange traction winch and main cable traction rope on the starting bank tunnel anchor portal platform, and set up in-hole traction system in the tunnel anchor on both banks to provide basis for subsequent main cable strand traction, complete the erection of traction system, and form two independent small circulation double-line reciprocating traction systems on the upstream side and downstream side of the starting bank respectively:

[0006] S200: Through strand traction, strand shaping, strand entering saddle, strand entering anchor and strand fixing, the reference strand is pulled from the starting bank to the terminal bank and fixed, and the erection of the reference strand is completed;

[0007] The strand traction step comprises:

[0008] S201: The cable disc and the cable laying frame are arranged beside the catwalk surface of the starting bank tunnel anchor portal, and the strand is turned into the catwalk surface through horizontal and vertical steering wheels; the strand is pulled by the main traction system intelligent pulling device, and passes through the starting bank tunnel anchor portal, the starting bank tower top, the terminal bank tower top, the terminal bank tunnel anchor portal, the front end of the strand saddle door frame of the terminal bank tunnel anchor saddle chamber section in turn;

[0009] S202: Change the traction mode, first use the main traction system to pull the main cable through the section again, and then use the in-hole traction system on the terminal bank to pull the relay in the hole, and then pull the strand anchor head to the front anchor surface of the terminal bank anchor plug body for temporary anchoring;

[0010] S203: On the starting bank tunnel anchor portal platform, the tower crane, the crawler crane and the automobile crane are used to pull out the in-cable disc outside the hole, and the main cable strand head on the cable disc is moved out;

[0011] S204: Change the traction mode, use the in-hole traction system on the starting bank to pull the strand head from the starting bank tunnel anchor portal support to the front anchor surface of the anchor plug body for temporary anchoring;

[0012] S300: According to the erection process of the reference strand, the traction, shaping, entering saddle, entering anchor and fixing of other strands are completed in turn until the erection of all strands is completed, and a complete main cable structure is formed.

[0013] Further, the step S100 comprises the following steps:

[0014] S101: Arrange 2 traction winches on the upstream and downstream tunnel anchor portal platforms of the starting bank, and store the main cable strand disc on the upstream and downstream tunnel anchor portal platforms;

[0015] S102: Set up an in-hole traction system in the tunnel anchor on both banks, and distribute the winch of the in-hole traction system on the starting bank on both sides of the tunnel anchor portal, and arrange the winch of the in-hole traction system on the terminal bank on the main cable through section.

[0016] S103: the main cable traction cable is pulled through the winch, horizontal and vertical steering wheel of the tunnel inside traction system, and then to the tunnel anchor cable saddle gantry, and then pulled into the front anchor surface, forming a traction system.

[0017] Further, the speed of the main cable during the process of pulling the strand is controlled at 20-30 m / min, and the running speed should be appropriately reduced at the curve change of the saddle, and the speed is 4-6 m / min.

[0018] Further, the two traction winches of a single main traction system should be kept synchronous during the process of pulling the strand, and the speed of pulling and releasing should be consistent. The passive traction winch always maintains a certain counter-tension.

[0019] Further, the step S200 further comprises the following steps:

[0020] S205: after the main cable strand is pulled and expanded between the two towers and the two anchors, the strand is lifted, transversely moved to the designed position, and shaped;

[0021] S206: the shaped strand is placed into the corresponding saddle groove of the main and scattered cable saddle, the strand is adjusted and compacted by knocking with a rubber mallet, and a wood block is embedded to increase friction, zinc blocks are placed in the groove of the saddle partition and pressed tightly by a jack;

[0022] S207: the anchor head is lowered to the corresponding position using the winch, the winch pulls the strand anchor head in the anchor chamber, and the two ends of the strand anchor head are connected to the anchoring system; after the verticality of the strand is adjusted, the zinc blocks are filled and pressed, the cover plate is installed, the tension rod is tightened, and permanent protection is carried out.

[0023] Further, the winch on the tunnel anchor cable saddle gantry and the tower top gantry is used to cooperate with a pulley group of not less than 40t to lift and transversely move the strand.

[0024] Further, in the step 205, when the strand is shaped, the position of the colored marker silk is adjusted first, the strand is clamped by a strand steel sheet fork shifter and a hexagonal clamp, then the clamp is slid to form a regular hexagon, and then the strand is adjusted to the normal position and square state by using the strand steel sheet fork shifter and a quadrilateral shaping tool.

[0025] Further, in the step 206, the order of the strand into the saddle is: first the main cable saddle, then the scattered cable saddle, the main cable saddle is from the side span side to the middle span side, and the scattered cable saddle is from the anchor span side to the cable tower side.

[0026] According to another aspect of the present application, the present application provides a main cable quick traction system for the main cable quick traction method described above, characterized in that the main cable quick traction system comprises a main traction system and an in-tunnel traction system, the main traction system comprises a main cable traction rope, a traction winch, an intelligent puller, a supporting roller, a steering roller, a tower top roller and a cable strand guide frame, and is used to realize the traction of the main cable strand from one end to the other end; the in-tunnel traction system comprises a tunnel anchor spreader saddle gantry, an in-tunnel traction rope, an in-tunnel winch, an in-tunnel steering roller and a traction pulley, and is used to traction the main cable strand into the tunnel anchor for anchoring.

[0027] Further, the intelligent puller is provided with a tension monitoring function, and can realize the real-time monitoring and control of the traction speed and tension of the main cable strand; the tower top rollers are arranged at the top of the main tower, and two are arranged on each side of the tower top, so as to optimize the traction line shape; the arrangement of the supporting rollers is densified near the two sides of the main tower saddle, and the vertical curve of the supporting rollers (14) is smoothed.

[0028] Overall, compared with the prior art, the above technical solutions conceived by the present application can achieve the following beneficial effects:

[0029] 1. The main cable quick traction system of the present application adopts an independent small-circulation double-line reciprocating traction system, friction-type traction winches are arranged on the starting bank upstream side and downstream side respectively, the winches are on the same bank, the transmission distance is short, the materials and equipment required for construction are reduced, and efficient bidirectional synchronous traction can be realized, thereby greatly improving the traction speed.

[0030] 2. The main cable quick traction system of the present application adopts an intelligent puller with a tension monitoring function, which can not only connect the strand front end anchor head and the main cable traction rope to realize the effective traction of the main cable strand, but also has a tension monitoring function, can realize the real-time monitoring and control of the traction speed and tension of the main cable strand, and automatically adjusts the traction speed and tension according to the actual stress of the strand, thereby avoiding the damage of the strand caused by human operation errors or excessive traction force, making the traction process more safe and reliable, and greatly improving the success rate and safety of the traction operation.

[0031] 3. The main cable quick traction system of the present application is provided with two roller groups on each side of the tower top, the bending radius of the strand when passing through the tower top is increased, the line shape of the main cable traction rope can be significantly improved, the traction line shape becomes more gentle, the local stress distribution is more uniform, thereby effectively reducing the wear of the strand and prolonging the service life of the strand, at the same time, the gentle line shape makes the dynamic stability of the strand when passing through the tower top better, avoids the safety accidents caused by the swing or distortion of the strand, and thus not only is beneficial to the protection of the strand, but also significantly improves the safety of the traction process.

[0032] 4. The main cable quick traction system of the present application can significantly improve the traction efficiency of the main cable strand by setting two groups of supporting wheel sets and two intelligent pullers on the upstream and downstream sides, realizing double-line reciprocating traction of the main cable strand. When the main cable strand on one side is pulled to the opposite bank, the intelligent puller on the other side can immediately start the traction operation of the next main cable strand, without waiting for equipment adjustment, greatly shortening the total time of the traction operation and improving the construction efficiency.

[0033] 5. The main cable quick traction system of the present application optimizes the layout of the multi-crane system cable deployment equipment, reducing the space required during the cable deployment process. BRIEF DESCRIPTION OF DRAWINGS

[0034] Figure 1 The main cable strand overall traction method and erection flowchart of the embodiment of the present application;

[0035] Figure 2 The main cable strand traction method flowchart of the embodiment of the present application;

[0036] Figure 3 The main cable strand traction system layout schematic diagram of the embodiment of the present application;

[0037] Figure 4 The cable disc cable deployment and strand guide frame schematic diagram of the embodiment of the present application;

[0038] Figure 5 The tunnel anchor inner traction system layout schematic diagram of the embodiment of the present application;

[0039] Figure 6 The four steps of the main cable strand traction of the embodiment of the present application;

[0040] Figure 7 The tower crane and crawler crane schematic diagram of the embodiment of the present application.

[0041] In all the drawings, the same reference signs represent the same technical features, specifically: 1-main traction system, 11-main cable traction strand, 12-traction winch, 13-intelligent puller, 14-supporting wheel, 15-steering wheel, 16-tower top guide wheel, 2-in-hole traction system, 21-tunnel anchor cable deployment saddle gantry, 22-in-hole traction strand, 23-in-hole winch, 24-drum, 3-main cable strand, 4-tunnel anchor hole platform, 5-strand anchor head, 6-cable disc, 7-main tower, 8-hole steering gantry, 9-tower crane, 10-crawler crane. DETAILED DESCRIPTION

[0042] In order to make the objects, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not to limit the present application. In addition, the technical features involved in the various embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0043] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative positional relationship, movement condition, etc. between the components in a certain posture (as shown in the drawings), and if the certain posture changes, the directional indications will also change accordingly. In addition, the technical solutions of the various embodiments can be combined with each other, but it must be based on the fact that a person of ordinary skill in the art can implement it, and when the combination of technical solutions conflicts with each other or cannot be implemented, it should be considered that the combination of technical solutions does not exist and is not within the scope of protection claimed by the present application.

[0044] In the description of the present application, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For a person of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0045] In the present application, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or includes elements inherent to such process, method, article or equipment. Without more limitations, the elements defined by the statement "including" do not exclude the presence of other identical elements in the process, method, article or equipment including the elements.

[0046] The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0047] Embodiment 1

[0048] The present embodiment provides a main cable rapid traction method, in the present embodiment, taking a certain double-tower suspension bridge as an example, the cable laying shore is taken as the starting shore, and the other shore is taken as the terminal shore, both shores use tunnel anchors, Figures 1-2 A flow chart of a main cable rapid traction method provided by the embodiments of the present application, the method comprises the following specific steps:

[0049] S100: At the starting bank tunnel anchor portal platform, arrange traction winch and main cable traction rope, and at the same time, arrange in-hole traction system in the tunnel anchor on both banks, to provide basis for subsequent main cable strand traction, complete erection of traction system, and form two independent small circulation double-line reciprocating traction systems on the upstream side and downstream side of the starting bank respectively;

[0050] The step S100 includes the following steps:

[0051] S101: At the upstream and downstream tunnel anchor portal platforms on the starting bank, arrange two traction winches respectively, and store the main cable strand cable reel at the upstream and downstream tunnel anchor portal platforms;

[0052] S102: Arrange an in-hole traction system in the tunnel anchor on both banks respectively, and the in-hole traction system winch on the starting bank is distributed on both sides of the tunnel anchor portal, and the in-hole traction system winch on the terminal bank is arranged at the main cable passing section.

[0053] S103: The main cable traction rope is led to the tunnel anchor cable spreader gantry through the winch of the in-hole traction system on both banks, horizontal and vertical steering wheels, and then is pulled into the front anchor face after steering, to form a traction system.

[0054] S200: Through strand traction, strand shaping, strand entering saddle, strand entering anchor and strand fixing, the reference strand is pulled from the starting bank to the terminal bank and fixed, to complete the erection of the reference strand; the specific steps are as follows:

[0055] S201: The cable reel and cable laying rack are arranged beside the catwalk face of the starting bank tunnel anchor portal, the cable reel is hoisted by using a crawler crane, the cable reel is installed on the cable laying rack, and the front end anchor head of the cable strand is pulled out, the anchor head is hoisted by using a crane to pass through the cable strand guide frame and connect with the intelligent pulling device of the traction system for cable strand traction, the cable strand is pulled out from the cable reel through the cable strand guide frame and supporting roller, and passes through the starting bank tunnel anchor portal, the starting bank tower top, the terminal bank tower top, the terminal bank tunnel anchor portal, and the front end of the cable spreader gantry of the terminal bank tunnel anchor saddle chamber section in sequence; the arrangement of the cable strand supporting roller is encrypted near both sides of the main tower cable saddle, and the vertical curve of the cable strand supporting roller is smoothly transitioned.

[0056] The traction speed of the main cable strand is controlled at 20-30 m / min, and the running speed should be appropriately reduced at the curve change of the saddle, and the speed is run at 4-6 m / min.

[0057] During the process of strand traction by a single traction system, the two traction winches should be kept synchronous, the speed of retraction and release is consistent, and the passive traction winch always maintains a certain counter pulling force.

[0058] S202: The main cable passing section is secondarily pulled by the main traction system, and then the end point in-hole traction system is used to pull the cable head to the front anchor face of the anchor plug body, and the cable head is temporarily anchored;

[0059] S203: The remaining cable in the cable tray is pulled out by the tower crane, crawler crane and automobile crane on the starting shore tunnel anchor hole platform. In this embodiment, the remaining main cable in the cable tray on the starting shore is pulled out (114 m remaining upstream and 83 m remaining downstream). The remaining upstream cable is pulled out by 114 m by the tower crane 9 and 150 t crawler crane 10 (as shown in FIG. 8), and the remaining downstream cable is pulled out by 83 m by the 150 t crawler crane and 25 t automobile crane. Figure 7

[0060] S204: The cable head is pulled from the starting shore tunnel anchor hole support to the front anchor face of the anchor plug body by the starting shore in-hole traction system, and then temporarily anchored. Specifically, the main cable anchor head is pulled to the lower part of the cable spreader saddle gantry by the tunnel anchor in-hole traction system, and then the traction pulley is replaced to continue pulling to the front anchor face, and the inverted chain is used to enter the anchor.

[0061] S205: After the main cable is pulled and spread between the two towers and the two anchors, the cable is pulled up, transversely moved to the designed position and shaped.

[0062] The pulled main cable is placed on the catwalk roller. Since the cable is pulled and erected along a position 1.5 m lower than the designed position of the main cable and deviated from the center line by about 2.2 m, the cable is pulled up and transversely moved by using the winch on the tunnel anchor spreader saddle gantry and the tower top gantry and a pulley block not less than 40 t.

[0063] When the cable is shaped, the position of the colored marker wire is adjusted, the cable is clamped by the cable steel sheet fork and the hexagonal clamp, the clamp is slid to form a regular hexagon, and then the cable is adjusted to the normal position and square state by using the cable steel sheet fork and the quadrilateral shaping tool.

[0064] S206: The shaped cable is placed in the corresponding saddle groove of the main and spreader saddles, the cable is adjusted, and then knocked and compacted by the rubber hammer, and the wood block is embedded to increase the friction, the zinc block is placed in the saddle partition groove and pressed by the jack.

[0065] The cable is placed in the saddle in the following order: first the main cable saddle, then the spreader saddle, and the main cable saddle is from the side span side to the midspan side, and the spreader saddle is from the anchor span side to the tower side.

[0066] ​S207: The anchor head is lowered to the corresponding position using the winch, the anchor head of the winch counter-pulley cable in the anchor chamber is connected with the anchoring system through the tie rod;

[0067] S208: After the cable sag is adjusted, the wedge-shaped wood in the saddle groove is removed, zinc blocks are filled therebetween, the cover plate is installed, the tie rod is fastened, and finally permanent protection is performed.

[0068] Among them, steps S201-S204 are cable traction steps. As shown in Figure 5 A schematic diagram of the cable traction steps.

[0069] S300: According to the erection process of the reference cable, the traction, shaping, saddle entry, anchor entry and fixation of other cables are sequentially completed until the erection of all cables is completed, forming a complete main cable structure.

[0070] Example 2

[0071] As shown in Figures 2-6 The embodiment of the present application provides a main cable rapid traction system for realizing the main cable rapid traction method in the embodiment 1, which comprises a main traction system 1 and a tunnel traction system 2. The main traction system 1 is used for the traction of the main cable cable, and the tunnel traction system 2 is used for the traction of the main cable cable into the tunnel anchor for anchoring. Wherein, the main traction system 1 comprises a main cable traction cable 11, a traction winch 12, an intelligent puller 13, a supporting wheel 14, a steering wheel 15, a tower top guide wheel 16 and a cable guide frame, wherein,

[0072] The main cable traction cable 11 adopts a φ36mm (6×36WS+IWR) steel wire rope as a carrier for traction of the main cable cable 3, connects the traction winch 12 and the main cable cable 3, bears the traction force, and tractions the main cable cable 3 from one end to the other end.

[0073] The traction winch 12 is a 30t friction type traction winch, which is respectively arranged at the upstream tunnel anchor tunnel mouth platform 4 and the downstream tunnel anchor tunnel mouth platform 5 of the starting bank of the suspension bridge, is used for traction of the main cable traction cable 1, provides traction force, and drives the traction of the main cable cable 3.

[0074] The intelligent puller 13 is used for connecting the cable anchor head 6 and the main cable traction cable 1, and tracting the main cable cable 3, has a tension monitoring function, can monitor and control the traction speed and tension of the main cable cable 3 in real time, and ensures the safety of the main cable cable in the traction process.

[0075] The cable guide frame 4 is installed at the outlet of the cable disc 6, is used for guiding the main cable cable 5 out of the cable disc 6 and into the traction system, and ensures the smooth entry of the cable into the traction path;

[0076] The supporting wheels 14 are distributed in the catwalk and the tunnel anchor saddle chamber section, including horizontal rollers and vertical rollers, used to support and adjust the position of the main cable strand 3. The main cable strand 3 is pulled to the top of the main tower 7 under the support of the supporting wheels 14 on the catwalk. The arrangement of the supporting wheels 14 is encrypted near the two sides of the cable saddle of the main tower 7, forming an encrypted supporting wheel area, and the vertical curve of the supporting wheels 14 is smoothly transitioned, ensuring the smooth transition of the main cable strand 3 at the top of the tower.

[0077] The turning wheels 15 are arranged on the tunnel anchor saddle chamber section and the portal turning gantry 8, including horizontal and vertical turning wheels, used to change the direction of the traction cable.

[0078] The tower top guide wheels 16 are arranged at the top of the main tower 7 to guide the main cable traction cable 11, optimize the traction line shape, and use two tower top guide wheels 8 on each side of the tower top to make the traction line shape more gentle, reduce the wear and stress concentration of the main cable strand 3 at the top of the tower, and improve the safety and stability of the traction process.

[0079] The in-tunnel traction system 2 is arranged in the tunnel anchor on both sides of the tunnel, including a tunnel anchor cable saddle gantry 21, an in-tunnel traction cable 22, an in-tunnel winch 23, in-tunnel turning wheels and traction pulleys,

[0080] The tunnel anchor cable saddle gantry 21 is arranged at the tunnel anchor to support the main cable strand and disperse it into strands to be anchored on the anchor;

[0081] The in-tunnel traction cable 22 adopts a φ24mm steel wire rope;

[0082] The in-tunnel winch 23 adopts a 10t winch;

[0083] The main traction system 1 pulls the main cable strand to the tunnel anchor portal tunnel anchor cable saddle gantry 21, and then pulls the main cable strand 3 into the tunnel anchor through the in-tunnel traction system 2 for anchoring, and through the cooperation of the in-tunnel winch 23 and the in-tunnel traction cable 22, the precise traction and anchoring of the main cable strand 3 in the tunnel are realized.

[0084] Those skilled in the art will readily understand that the above description is only a preferred embodiment of the present application and is not intended to limit the present application, and any modifications, equivalent replacements and improvements made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A method for fast pulling of a main cable, characterized in that, Comprise the following specific steps: S100: Arrange traction winch and main cable traction rope on the starting bank tunnel anchor opening platform, and set up in-hole traction system in the tunnel anchor on both banks, to provide basis for subsequent main cable strand traction, complete the erection of traction system, and form two independent small circulation double-line reciprocating traction systems on the upstream side and downstream side of the starting bank respectively: S200: Through strand traction, strand shaping, strand into saddle, strand into anchor and strand fixation, the reference strand is pulled from the starting bank to the terminal bank and fixed, and the erection of the reference strand is completed; The strand traction step comprises: S201: The cable disc and cable laying frame are arranged beside the catwalk surface of the starting bank tunnel anchor opening, and the strand is turned into the catwalk surface through horizontal and vertical steering wheels; the strand is pulled by the main traction system intelligent pulling device, and passes through the starting bank tunnel anchor opening, the starting bank tower top, the terminal bank tower top, the terminal bank tunnel anchor opening, the terminal bank tunnel anchor saddle chamber segment cable dispersion saddle door frame front end in sequence; S202: Change the traction mode, first pull the main cable through segment again by the main traction system, and then pull the in-hole relay by the terminal bank in-hole traction system, and pull the strand anchor head to the front anchor surface of the terminal bank anchor plug body and temporarily anchor; S203: On the starting bank tunnel anchor opening platform, the cable head of the main cable strand on the cable disc is pulled out by using the tower crane, crawler crane and automobile crane to cooperate with the cable outside exhibition of the cable disc inside the cable; S204: Change the traction mode, and pull the strand head from the starting bank tunnel anchor opening support to the front anchor surface of the anchor plug body by using the starting bank in-hole traction system, and temporarily anchor after that; S300: According to the erection process of the reference strand, the traction, shaping, into saddle, into anchor and fixation of other strands are completed in sequence until the erection of all strands is completed, and a complete main cable structure is formed.

2. The method of claim 1, wherein, The step S100 comprises the following steps: S101: Arrange 2 traction winches on the upstream and downstream tunnel anchor opening platforms of the starting bank, and store the main cable strand cable disc on the upstream and downstream tunnel anchor opening platforms; S102: Set up an in-hole traction system in the tunnel anchor on both banks, and distribute the starting bank in-hole traction system winch on both sides of the tunnel anchor opening, and arrange the terminal bank in-hole traction system winch on the main cable through segment; S103: The main cable traction rope passes through the winch, horizontal and vertical steering wheels of the in-hole traction system on both banks, and is pulled into the front anchor surface after turning on the tunnel anchor cable dispersion saddle door frame, to form the traction system.

3. The method of claim 1, wherein, In the process of strand traction, the traction speed of the main cable strand is controlled at 20-30 m / min, and the running speed should be appropriately reduced at the saddle curve change, and the speed is 4-6 m / min.

4. The method of claim 3, wherein, In the process of strand traction, the two traction winches of a single main traction system should be kept synchronous, the speed of winding and unwinding should be consistent, and the passive traction winch should always maintain a certain counter pulling force.

5. A method of rapid pulling of a main cable according to any one of claims 1-4, characterized in that, The step S200 further comprises the following steps: S205: After the main cable strand is pulled and expanded between the two towers and the two anchors, the strand is lifted, transversely moved to the design position and shaped; S206: the shaped strand is placed into the corresponding saddle groove of the main and scattered cable saddle, the strand is adjusted, and then is compacted by knocking with a rubber mallet, and the friction is increased by embedding wood blocks, zinc blocks are placed in the saddle groove and are pressed tightly by a jack; S207: the anchor head is lowered to the corresponding position by using a winch, the strand anchor head at both ends is connected to the anchoring system by pulling the strand in the anchor chamber by the winch, after the strand verticality is adjusted, the zinc blocks are filled and pressed, the cover plate is installed, the pull rod is fastened, and permanent protection is carried out.

6. A method of rapid pulling of a main cable according to claim 5, characterized in that, In the step 205, the strand is lifted and transversely moved by using the winch on the tunnel anchor scattered cable saddle gantry and the tower top gantry and a block group with a capacity of not less than 40t.

7. A method of rapid pulling of a main cable according to claim 6, characterized in that, In the step 205, when the strand is shaped, the position of the colored marking wire is adjusted first, the strand is clamped by using a strand steel sheet fork shifter and a hexagonal clamp, then the clamp is slid to form a regular hexagon, and the strand is adjusted to a normal position and a square state by using a strand steel sheet fork shifter and a quadrilateral shaping tool.

8. The method of claim 7, wherein, In the step 206, the strand is placed into the saddle in the following order: first the main cable saddle, then the scattered cable saddle, the main cable saddle is from the side span side to the midspan side, and the scattered cable saddle is from the anchor span side to the tower side.

9. A main cable quick pull system for implementing a main cable quick pull method according to any one of claims 1 to 8, characterized in that, The main traction system (1) comprises a main cable traction strand (11), a traction winch (12), an intelligent pulling device (13), a supporting wheel (14), a steering wheel (15), a tower top guide wheel (16) and a strand guide frame, and is used for realizing traction of the main cable strand (3) from one end to the other end; the in-tunnel traction system (2) comprises a tunnel anchor scattered cable saddle gantry (21), an in-tunnel traction strand (22), an in-tunnel winch (23), an in-tunnel steering wheel and a traction pulley, and is used for traction of the main cable strand (3) into the tunnel anchor for anchoring.

10. A main cable fast traction system according to claim 9, characterized in that, The intelligent pulling device (13) has a tension monitoring function, and can realize real-time monitoring and control of the traction speed and tension of the main cable strand (3); the tower top guide wheel (16) is arranged at the top of the main tower (7), and two are arranged on each side of the top, so as to optimize the traction line shape; the arrangement of the supporting wheel (14) is densified near the two sides of the main tower saddle, and the vertical curve of the supporting wheel (14) is smoothly transitioned.

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