A method for hoisting and constructing a large-inclination deep-hole suspension bridge by using a sliding method of cable saddle supports

Abstract

The application discloses a large-inclination deep-hole suspension bridge splay saddle support sliding method hoisting construction method, which comprises the steps of hoisting device installation, positioning frame installation, base plate hoisting, sliding device installation, splay saddle support hoisting and splay saddle body hoisting. The foot bolts and the base plate are pre-buried in the process of constructing the splay saddle support pier in the hole, and the base plate is accurately and firmly positioned through the rigid framework, so that the installation accuracy of the base plate is improved. When the base plate is installed, the hole has good visual conditions, low construction difficulty, easy installation and high installation efficiency.

Description

Technical Field

[0001] This invention relates to the field of cable saddle installation, and in particular to a method for the sliding hoisting of cable saddle supports in a suspension bridge with a large inclination angle in a deep tunnel. Background Technology

[0002] A cable saddle is a structure specifically designed to support suspension cables as they pass over the top of the tower and smoothly change the direction of the main cable. Suspension bridge cable saddles are generally divided into main cable saddles and branch cable saddles. The main cable saddle primarily transmits the enormous pressure from the main cable to the main tower, while the branch cable saddle primarily changes the direction of force transmission in the main cable and distributes the main cable into strands, which are then anchored to the anchorage. Branch cable saddles are mostly cast steel components, mainly composed of a base plate, a support, and a saddle body. To facilitate casting, transportation, and installation, the saddle body is machined into several sections and assembled into a whole. Branch cable saddles have a complex shape, and the saddle body has two main functions: first, to shape the hexagonal strands of the main cable into rectangles and compress them within the saddle groove; and second, to distribute the main cable strands along the arc-shaped groove inside the saddle. Due to the special structural characteristics of branch cable saddles, which conform to the inclined anchorage of the strands, they are generally arranged obliquely on the anchorage. Compared to the installation of main cable saddles, the installation of branch cable saddles requires consideration of special working conditions such as overturning, slippage, and oblique positioning. However, in cases where the distance between the cable release point and the anchor hole opening is large and the inclination angle of the cable saddle support is large, large lifting machinery cannot be used for the installation of the cable release saddle, resulting in low positioning accuracy and low installation efficiency.

[0003] Regarding the aforementioned technologies, the applicant believes that the following defects exist: the installation accuracy of the cable saddle is low and the installation efficiency is low. Summary of the Invention

[0004] To improve the installation accuracy and efficiency of cable saddles, this application provides a method for the sliding hoisting of cable saddle supports in a deep-cut suspension bridge with a large inclination angle.

[0005] This application provides a method for the sliding hoisting of cable saddle supports for suspension bridges in deep, steeply inclined tunnels, employing the following technical solution:

[0006] A method for the sliding hoisting of cable saddle supports for a suspension bridge in a deep, steeply inclined tunnel includes the following steps:

[0007] Installation of the hoisting equipment: The hoisting equipment includes a first winch, a second winch, a load-bearing rope, a traction rope, a pulley, and a steering pulley. Both the first and second winches are installed outside the tunnel. The steering pulley is anchored to the top of the tunnel entrance. One end of the load-bearing rope is anchored to the I-beam of the tunnel arch at the bottom and top. The other end of the load-bearing rope is connected to the first winch via the steering pulley. The pulley slides along the load-bearing rope inside the tunnel. Both ends of the traction rope are connected to the pulley and the second winch, respectively. Method for hoisting materials: Initially, the load-bearing rope is in a slack state. In this state, the pulley is placed on the ground at the entrance of the tunnel. After the material is transported to the entrance, the hook of the pulley is used to hook the material. Then, the first winch is started to gradually tighten the load-bearing rope. When the material is ready to leave the ground, the second winch is started to pull the pulley. The first winch continues to tighten the load-bearing rope. The material leaves the ground and slides into the tunnel under its own weight and the combined action of the first and second winches. When the material is hoisted to the installation position, the first winch gradually loosens the load-bearing rope, and the material can be lowered to the installation position for installation.

[0008] Positioning frame installation: When the concrete of the cable saddle support pier is poured to the second to last layer, a hoisting device is used to lift the single rod of the positioning frame to the cable saddle support pier, and then assemble it into a positioning frame to serve as the flexible skeleton of the cable saddle support pier. Then, the concrete of the second to last layer of the cable saddle support pier is poured.

[0009] Base plate hoisting: Before pouring the concrete for the top layer of the cable saddle support, first adjust the top elevation, inclination angle, and longitudinal and transverse center lines of the positioning frame according to the design position. Then, use a hoisting device to hoist the base plate to the top of the cable saddle support. Then, insert the anchor bolts into the base plate, and then hoist the base plate into the positioning frame and fix it to the positioning frame. Finally, pour the concrete for the top layer of the cable saddle support. The lower part of the base plate is embedded in the cable saddle support.

[0010] Installation of the sliding device: The sliding device includes an inclined sliding frame assembly and a gantry assembly. The gantry assembly is installed on both sides and above the base plate facing the tunnel wall. Both the inclined sliding frame assembly and the gantry assembly are installed by assembling individual rods inside the tunnel. The individual rods of the inclined sliding frame assembly and the gantry assembly are hoisted to the installation position inside the tunnel by a hoisting device for installation. The installation sequence is from bottom to top and from inside the tunnel to outside the tunnel.

[0011] Cable saddle support hoisting: At the tunnel entrance, the cable saddle support is hoisted onto the inclined slide frame assembly inside the tunnel using a crane. Then, the cable saddle support is gradually slid down to the gantry assembly using a winch outside the tunnel to apply reverse traction force. Finally, the gantry assembly lifts it up and installs it onto the base plate.

[0012] Cable saddle hoisting: At the tunnel entrance, the cable saddle body is hoisted onto the inclined slide frame assembly inside the tunnel using a crane. Then, using a winch outside the tunnel to apply reverse traction force, the cable saddle body is gradually slid down to the gantry assembly. After being lifted by the gantry assembly, it is installed onto the cable saddle support and fixed to the cable saddle support, thus completing the cable saddle hoisting.

[0013] By adopting the above technical solution, anchor bolts and base plates are pre-embedded during the construction of the cable saddle support in the tunnel. The base plates are then precisely and securely positioned using a positioning frame, improving the installation accuracy of the base plates. During base plate installation, the tunnel has good visibility, making construction easier, more efficient, and less difficult. Later, the numerous supports within the tunnel significantly interfere with the installation of the cable saddle support and saddle body. However, since the base plates are already precisely and securely installed, the installation of the cable saddle support and saddle body only requires bolt connections, making installation convenient and quick. The installation accuracy of the cable saddle is primarily determined by the installation accuracy of the base plates. The base plate of this application is fixed on the positioning frame and partially embedded in the cable saddle support pier. Therefore, the base plate of this application can remain fixed during the installation of the cable saddle support and cable saddle body. The cable saddle support and cable saddle body of this application can be installed quickly while ensuring stable installation accuracy. This application installs a hoisting device before installing the sliding device, thereby meeting the condition of transporting the positioning frame and base plate to the installation position when the cable saddle support pier is poured. At the same time, the hoisting device can also assist in the subsequent installation of the sliding device, improve the installation speed of the sliding device, and thus improve the installation efficiency of the cable saddle.

[0014] Preferably, before pouring the top concrete of the cable saddle support pier, the top surface of the base plate is wrapped and covered to prevent contamination of the groove. After pouring, the exposed contaminants on the base plate are cleaned up in time.

[0015] By adopting the above technical solution, the exposed part of the base plate is kept clean and free of contamination, thereby ensuring that the subsequent cable saddle support can fit snugly against the base plate and ensuring the installation accuracy of the cable saddle support and the cable saddle body.

[0016] Preferably, the reinforcing bars are tied after the base plate is hoisted. When tying the reinforcing bars, it is necessary to avoid the anchor bolts and the base plate, and it is forbidden to move the anchor bolts and the base plate.

[0017] By adopting the above technical solution, the installation accuracy can be avoided due to changes in the position of the anchor bolts and base plate.

[0018] Preferably, rollers are installed at the bends of the traction ropes at the bottom of the tunnel to facilitate the bends of the traction ropes and reduce wear on the traction ropes.

[0019] By adopting the above technical solutions, wear on the traction rope is reduced while ensuring that the traction rope can extend smoothly, thus preventing the traction rope from getting stuck.

[0020] Preferably, when hoisting the cable saddle support, a PTFE plate is placed under the cable saddle support as a sliding shoe to slide into position on the inclined slide assembly. At the same time, limit blocks are installed on both sides of the bottom of the cable saddle support near the slide rail to prevent the cable saddle support from shifting laterally or even falling off during the sliding process. Similarly, the same operation is performed when hoisting the cable saddle body.

[0021] By adopting the above technical solution, the PTFE plate can prevent wear on the cable saddle support and cable saddle body during sliding, and keep the cable saddle support and cable saddle body intact and slide smoothly to the gantry assembly.

[0022] Preferably, after the base plate is hoisted, a pad is placed on the base plate. The upper surface of the pad is inclined, and the inclination angle of the inclined surface is the same as the inclination angle of the slide rail of the inclined carriage assembly. The thickness of the pad is the same as the thickness of the cable saddle support. The end of the upper surface of the pad near the inclined carriage assembly is aligned with the lower end of the slide rail of the inclined carriage assembly. When the cable saddle support is hoisted, the cable saddle support slides directly from the inclined carriage assembly onto the pad, and then the gantry assembly vertically lifts the cable saddle support. Then the pad is removed. The gantry assembly lowers the cable saddle support vertically onto the support plate and fixes it to the support plate. After the cable saddle support is installed, the upper surface of the cable saddle support near the inclined slide assembly aligns with the lower end of the slide rail of the inclined slide assembly. When the cable saddle body is hoisted, the cable saddle body slides directly from the inclined slide assembly onto the cable saddle support. Then, the gantry assembly vertically lifts the cable saddle support, adjusts its position, and lowers it onto the cable saddle support. Finally, the cable saddle body is fixedly connected to the cable saddle support.

[0023] By adopting the above technical solution, the slide rail of the inclined carriage assembly is connected to the pad plate, which allows the cable saddle support and cable saddle body to slide directly from the slide rail to the top of the base plate. Therefore, the gantry assembly does not need to move the cable saddle support and cable saddle body laterally and longitudinally. The sway of the cable saddle support and cable saddle body is minimal, which makes it easy to place the cable saddle support and cable saddle body in the accurate position and simplifies the structure of the gantry assembly.

[0024] Preferably, the pads are provided in multiple pieces, and the multiple pads are fixed together by screws and nuts.

[0025] By adopting the above technical solution, the multiple pads can be separated by loosening the screw, making it convenient to disassemble the pads one by one.

[0026] Preferably, the sliding device also includes a backrest frame assembly, which is installed on the side of the base plate facing away from the opening. A jack is provided on the side of the backrest frame assembly facing the opening, and the jack is used to precisely adjust the deviation of the cable saddle.

[0027] By adopting the above technical solution, after the cable saddle body is installed on the cable saddle support, the offset of the cable saddle is precisely adjusted by jacks to adjust the cable saddle to the designed empty cable position.

[0028] Preferably, the positioning frame includes multiple support rods, each support rod including a sleeve and a sleeve rod, one end of the sleeve rod being threaded to one end of the sleeve, the multiple sleeves being fixedly connected by a crossbeam, and the upper end of each sleeve rod being connected to a support plate through an adjustment mechanism, the adjustment mechanism being able to adjust the tilt angle of the support plate, and the upper end of the sleeve rod abutting against the support plate.

[0029] By adopting the above technical solution, the support rod provides vertical support to the base plate, and the support plate is used to connect the base plate and keep the angle of the base plate stable. Since the position of the positioning frame after the concrete pouring of the second-to-last layer of cable saddle support pier may be deviated, the rotating sleeve rod can adjust the height of the support rod, and the adjustment mechanism can adjust the angle of the support plate so that the angle of the support plate is consistent with the angle of the base plate, keeping the base plate accurately positioned and firm, and improving the accuracy of the base plate.

[0030] Preferably, the adjusting mechanism includes multiple collars and multiple adjusting rods. The collars are sleeved on the outside of the rods and threadedly connected to the rods. The multiple adjusting rods are respectively arranged around the circumference of the collars. The two ends of each adjusting rod are hinged to the collar and the support plate, respectively. The length of each adjusting rod is adjustable. Each adjusting rod includes two end rods and a connecting rod. The connecting rod is located between the two end rods, and its two ends are threadedly connected to the two end rods, respectively.

[0031] By adopting the above technical solution, the rotating collar can adjust the height of the support plate, and the rotating connecting rod can adjust the angle of the support plate, making it convenient to adjust the height and angle of the support plate. At the same time, the adjusting rod provides a certain support for the support plate. The adjusting rod and the support rod together provide vertical support for the support plate, resulting in high load-bearing capacity and stable support.

[0032] In summary, this application includes at least one of the following beneficial technical effects:

[0033] 1. During the construction of the cable saddle support in the tunnel, anchor bolts and base plates are pre-embedded, and the base plates are precisely positioned and firmly secured by a rigid frame, improving the installation accuracy of the base plates. When installing the base plates, the tunnel has good visibility, making construction easier, easier, and more efficient. Later, various supports are present in the tunnel, which greatly interferes with the installation of the cable saddle support and the cable saddle body. Since the base plates are already precisely installed and firmly secured, the installation of the cable saddle support and the cable saddle body only requires bolt connection, making installation convenient and quick. The installation accuracy of the cable saddle is mainly controlled by the installation accuracy of the base plate. In this application, the base plate is fixed on the positioning frame and partially pre-embedded in the cable saddle support. Therefore, the base plate of this application can remain fixed during the installation of the cable saddle support and the cable saddle body. The cable saddle support and the cable saddle body of this application can be installed quickly while ensuring stable installation accuracy.

[0034] 2. The pad plate connects to the slide rail of the inclined carriage assembly, allowing the cable saddle support and cable saddle body to slide directly from the slide rail to the top of the base plate. Therefore, the gantry assembly does not need to move the cable saddle support and cable saddle body laterally or longitudinally. The sway of the cable saddle support and cable saddle body is minimal, making it easy to place the cable saddle support and cable saddle body in the accurate position and simplifying the structure of the gantry assembly.

[0035] 3. The support rod provides vertical support to the base plate, and the support plate is used to connect the base plate and keep the base plate angularly stable. Since the position of the positioning frame after the concrete pouring of the second-to-last layer of cable saddle support pier may be deviated, the rotating sleeve rod can adjust the height of the support rod, and the adjustment mechanism can adjust the angle of the support plate so that the angle of the support plate is consistent with the angle of the base plate, keeping the base plate accurately and firmly positioned and improving the accuracy of the base plate. Attached Figure Description

[0036] Figure 1 This is a flowchart of a method for hoisting a suspension bridge with a large inclination angle and a saddle support in a deep tunnel using the sliding method, as described in Embodiment 1 of this application.

[0037] Figure 2 This is a schematic diagram of the installation of the hoisting device according to Embodiment 1 of this application.

[0038] Figure 3 This is an installation diagram of the positioning frame, base plate, and sliding device according to Embodiment 1 of this application.

[0039] Figure 4 This is a schematic diagram of the installation of the backrest frame assembly and cable saddle support according to Embodiment 1 of this application.

[0040] Figure 5 This is a schematic diagram of the positioning frame according to Embodiment 2 of this application.

[0041] Figure 6 yes Figure 5 Enlarged view of point A.

[0042] Figure 7 This is a schematic diagram of the structure of the pad block in Embodiment 3 of this application.

[0043] Explanation of reference numerals in the attached figures:

[0044] 1. First winch; 2. Load-bearing rope; 3. Running pulley; 4. Second winch; 5. Traction rope; 6. Positioning frame; 61. Sleeve; 62. Sleeve rod; 63. Crossbar; 64. Adjusting mechanism; 641. Collar; 642. Adjusting rod; 6421. End rod; 6422. Connecting rod; 6423. Adjusting handle; 65. Support plate; 7. Base plate; 8. Anchor bolt; 9. Gantry assembly; 10. Inclined slide assembly; 11. Backrest frame assembly; 12. Jack; 13. Cable saddle support; 14. Pad; 15. Screw; 16. Nut. Detailed Implementation

[0045] The following is in conjunction with the appendix Figures 1-7 This application will be described in further detail.

[0046] This application discloses a method for hoisting a cable saddle support in a deep, steeply inclined tunnel using a sliding method.

[0047] Example 1

[0048] Reference Figure 1 A method for the sliding hoisting of cable saddle supports for a suspension bridge in a deep, steeply inclined tunnel includes the following steps:

[0049] Installation of hoisting equipment: Refer to Figure 2The hoisting device includes a first winch 1, a second winch 4, a load-bearing rope 2, a traction rope 5, a trolley 3, a steering pulley, and a drum. The first winch 1 and the second winch 4 are both installed outside the tunnel. The steering pulley is anchored to the top of the tunnel entrance. One end of the load-bearing rope 2 is anchored to the I-beam of the arch frame at the bottom of the tunnel. The other end of the load-bearing rope 2 is connected to the first winch 1 through the steering pulley. The trolley 3 is slidably installed on the load-bearing rope 2 inside the tunnel. The two ends of the traction rope 5 are connected to the trolley 3 and the second winch 4, respectively. The drum is located at the bend in the lower part of the tunnel, and the traction rope 5 passes through the top of the drum. Method for hoisting materials using a hoisting device: Initially, the load-bearing rope 2 is in a slack state. The pulley 3 is placed on the ground at the opening. After the material is transported to the opening, the hook of the pulley 3 is used to hook the material. Then, the first winch 1 is started to gradually tighten the load-bearing rope 2. When the material is ready to leave the ground, the second winch 4 is started to pull the pulley 3 for the material. The first winch 1 continues to tighten the load-bearing rope 2. The material leaves the ground and slides into the opening under its own weight and the combined action of the first winch 1 and the second winch 4. When the material is hoisted to the installation position, the first winch 1 gradually loosens the load-bearing rope 2, and the material can be lowered to the installation position for installation.

[0050] Installation of Positioning Frame 6: When the concrete of the cable saddle support pier is poured to the second to last layer, a hoisting device is used to lift the single rod of the positioning frame 6 to the cable saddle support pier, and then assemble them into positioning frame 6. Positioning frame 6 serves as the flexible skeleton of the cable saddle support pier. After the positioning frame 6 is installed, the concrete of the second to last layer of the cable saddle support pier is poured. The lower end of the positioning frame 6 is embedded in the concrete of the second to last layer of the cable saddle support pier, and the upper end of the positioning frame 6 extends to the top layer of the cable saddle support pier.

[0051] Base Plate 7 hoisting: Before pouring the concrete for the top layer of the cable saddle support pier, first adjust the top elevation, inclination angle, and longitudinal and transverse center lines of the positioning frame 6 according to the design position. Then, use a hoisting device to hoist the base plate 7 to the top of the cable saddle support pier. Next, insert the anchor bolts 8 onto the base plate 7. The fit between the anchor bolts 8 and the base plate 7 is either an interference fit or a threaded connection. Then, hoist the base plate 7 onto the positioning frame 6. After the base plate 7 is positioned, weld it to the positioning frame 6 for fixation. After the base plate 7 is fixed to the positioning frame 6, tie the reinforcing bars for the top layer of the cable saddle support pier. When tying the reinforcing bars, avoid the anchor bolts 8 and the base plate 7, and do not move the anchor bolts 8 and the base plate 7. After the reinforcing bars are tied, wrap and cover the top surface of the base plate 7, and then pour the concrete for the top layer of the cable saddle support pier. After pouring the concrete, the lower part of the base plate 7 is embedded in the cable saddle support pier. After the pouring is completed, the contaminants on the exposed parts of the base plate 7 should be cleaned in time. The anchor bolts 8 should be embedded at a depth of not less than 1050mm, the thickness of the base plate 7 should be not less than 90mm, and the embedding depth of the base plate 7 should be not less than 50mm.

[0052] Sliding device installation: Refer to Figure 3 The sliding device includes an inclined slide assembly 10 and a gantry assembly 9, both of which are conventional technologies. The gantry assembly 9 is installed on both sides and above the base plate 7 facing the tunnel wall. The inclined slide assembly 10, gantry assembly 9, and backrest assembly 11 are all installed by assembling individual rods inside the tunnel. The individual rods of the inclined slide assembly 10, gantry assembly 9, and backrest assembly 11 are hoisted to their installation positions inside the tunnel using a hoisting device. The installation sequence is from bottom to top and from inside the tunnel to outside.

[0053] Installation of the cable saddle support 13: At the tunnel entrance, a crane is used to hoist the cable saddle support 13 onto the inclined slide assembly 10 inside the tunnel. Then, using a winch outside the tunnel to apply reverse traction, the cable saddle support 13 is gradually slid down to the gantry assembly 9, and then lifted by the gantry assembly 9 and installed onto the base plate 7. A PTFE plate is placed under the cable saddle support 13 as a sliding shoe to slide into position on the inclined slide assembly 10. Simultaneously, limiting blocks are installed on both sides of the bottom of the cable saddle support 13 near the slide rail to prevent lateral displacement or even falling during the sliding process.

[0054] Installation of the cable saddle: At the tunnel entrance, a crane is used to hoist the cable saddle onto the inclined slide assembly 10 inside the tunnel. Then, using a winch outside the tunnel, the cable saddle is gradually slid down to the gantry assembly 9, where it is lifted and installed onto the cable saddle support 13 and secured. This completes the installation of the cable saddle. A PTFE plate is placed under the cable saddle as a sliding shoe to allow it to slide into position on the inclined slide assembly 10. Simultaneously, limit blocks are installed on both sides of the bottom of the cable saddle near the slide rail to prevent lateral displacement or even falling during the sliding process.

[0055] In another embodiment, refer to Figure 4 The sliding device also includes a backrest frame assembly 11, which is installed on the side of the base plate 7 facing away from the opening. The backrest frame assembly includes a backrest, which is fixedly connected to the cable saddle support by pre-embedded bolts. A jack 12 is installed on the side of the backrest facing the opening, which is used to precisely adjust the cable saddle offset.

[0056] The implementation principle of the sliding hoisting method for the cable saddle support of a suspension bridge in a deep tunnel with a large inclination angle in this application embodiment is as follows: During the construction of the cable saddle support pier in the tunnel, anchor bolts 8 and base plates 7 are pre-embedded and precisely positioned and secured by a stiffening frame, improving the installation accuracy of the base plates 7. When installing the base plates 7, the visibility conditions inside the tunnel are good, the construction difficulty is low, installation is easy, and the installation efficiency is high. Later, various supports are numerous inside the tunnel, which greatly interferes with the installation of the cable saddle support 13 and the cable saddle body. Since the base plates 7 are already precisely installed and secure, the installation of the cable saddle support 13 and the cable saddle body only requires bolt connection, making the installation convenient and quick. Since the installation accuracy of the cable saddle is mainly controlled by the installation accuracy of the base plate 7, and the base plate 7 of this application is fixed on the positioning frame 6 and partially embedded in the cable saddle support, the base plate 7 of this application can remain fixed during the installation of the cable saddle support 13 and the cable saddle body. This allows for rapid installation of the cable saddle support 13 and the cable saddle body while ensuring stable installation accuracy. This application installs a hoisting device before installing the sliding device, thus meeting the condition of transporting the positioning frame 6 and the base plate 7 to the installation position during the pouring of the cable saddle support. Simultaneously, the hoisting device can assist in the subsequent installation of the sliding device, increasing the installation speed of the sliding device and thus improving the installation efficiency of the cable saddle.

[0057] Example 2

[0058] Reference Figure 5 and Figure 6The difference between this method and the first embodiment of the sliding hoisting construction method for the cable saddle support of a suspension bridge in a deep, steeply inclined tunnel is that the positioning frame 6 includes multiple support rods, which are connected to each other by a crossbar 63. Each support rod includes a sleeve 61 and a sleeve rod 62. The sleeves 61 of the multiple support rods are connected to each other by the crossbar 63. The lower end of the sleeve 61 is closed, and the upper end is open. The lower end of the sleeve rod 62 is threaded to the upper end of the sleeve 61. The multiple sleeves 61 are fixedly connected by a crossbeam. The upper end of each sleeve rod 62 is connected to a support plate 65 via an adjustment mechanism 64. The adjustment mechanism 64 can adjust the tilt angle of the support plate 65, and the upper end of the sleeve rod 62 abuts against the support plate 65. The adjusting mechanism 64 includes multiple collars 641 and multiple adjusting rods 642. The collars 641 are sleeved on the outside of the rods 62 and threadedly connected to the rods 62. The multiple adjusting rods 642 are arranged around the circumference of the collars 641. The two ends of each adjusting rod 642 are hinged to the collars 641 and the support plate 65, respectively. The length of the adjusting rod 642 is adjustable. Each adjusting rod 642 includes two end rods 6421 and a connecting rod 6422. The connecting rod 6422 is positioned between the two end rods 6421, and its two ends are threadedly connected to the two end rods 6421. An adjusting handle 6243 is fixed to the outside of the connecting rod 6422. After rotating the collars 641, the rods 62 need to be rotated to maintain contact between the rods 62 and the support plate 65, thereby maintaining the supporting force of the support rod on the support plate 65. The sleeve 62 has a through hole connecting to the inner cavity of the sleeve 61. Multiple air extraction holes are distributed axially along the side wall of the sleeve 62, connecting to the through hole. The uppermost air extraction hole connects to the upper end of the through hole. The angle of the support plate 65 is adjusted by rotating the collar 641 and connecting rod 6422, and then the sleeve 62 is rotated so that its upper end abuts against the support plate 65. When the concrete for the cable saddle support is poured to the last layer, an air pipe is used to connect to the uppermost air extraction hole to extract air from the sleeve 61 and the through hole, allowing the sleeve 61 and the through hole to be filled with concrete, thereby increasing the strength of the sleeve 61. Simultaneously, the concrete entering the sleeve 61 and the through hole allows the sleeve 62 and the sleeve 61 to be fixed together.

[0059] Example 3

[0060] Reference Figure 7A method for hoisting a cable saddle support in a deep, steeply inclined tunnel suspension bridge using a sliding method differs from Embodiment 2 in that, after the base plate 7 is hoisted, a pad is placed on the base plate 7. The upper surface of the pad is an inclined surface with the same inclination angle as the slide rail of the inclined slide assembly 10. The thickness of the pad is the same as the thickness of the cable saddle support 13. The end of the upper surface of the pad closest to the inclined slide assembly 10 is connected to the lower end of the slide rail of the inclined slide assembly 10. During the hoisting of the cable saddle support 13, the cable saddle support 13 slides directly from the inclined slide assembly 10 onto the pad, and then the gantry assembly 9 lifts the cable saddle support 13 vertically. The pad is then removed, and the gantry assembly 9 lowers the cable saddle support 13 vertically onto the support plate, where it is fixedly connected. After installation, the upper surface of the cable saddle support 13, near the end of the inclined slide assembly 10, aligns with the lower end of the slide rail of the inclined slide assembly 10. During the hoisting of the cable saddle body, the cable saddle body slides directly from the inclined slide assembly 10 onto the cable saddle support 13. The gantry assembly 9 then lifts the cable saddle support 13 vertically, adjusts its position, and lowers it onto the cable saddle support 13. Finally, the cable saddle body is fixedly connected to the cable saddle support 13. The pads are provided in multiple pieces, which are fixed together by screws 15. The pads are fixed to the anchor bolts 8 by nuts 16. When disassembling, the pads are removed from the middle pad 14 to the pads on both sides.

[0061] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A method for the sliding hoisting of cable saddle supports for a suspension bridge in a deep, steeply inclined tunnel, characterized in that... Includes the following steps: Installation of the hoisting device: The hoisting device includes a first winch (1), a second winch (4), a load-bearing rope (2), a traction rope (5), a running pulley (3), and a steering pulley. The first winch (1) and the second winch (4) are installed outside the tunnel. The steering pulley is anchored to the top of the tunnel entrance. One end of the load-bearing rope (2) is anchored to the I-beam of the arch frame at the bottom of the tunnel. The other end of the load-bearing rope (2) is connected to the first winch (1) through the steering pulley. The running pulley (3) is slidably installed on the load-bearing rope (2) inside the tunnel. The two ends of the traction rope (5) are connected to the running pulley (3) and the second winch (4) respectively. Method of hoisting materials with the hoisting device: Initially, the load-bearing rope (2) When the material is in a relaxed state, the pulley (3) is placed on the ground at the entrance of the tunnel. After the material is transported to the entrance of the tunnel, the hook of the pulley (3) is used to hook the material. Then the first winch (1) is started to gradually tighten the load-bearing rope (2). When the material is ready to leave the ground, the second winch (4) is started to pull the material pulley (3). The first winch (1) continues to tighten the load-bearing rope (2). The material leaves the ground and slides into the tunnel under its own weight and the combined action of the first winch (1) and the second winch (4). When the material is hoisted to the installation position, the first winch (1) gradually loosens the load-bearing rope (2), and the material can be lowered to the installation position for installation. Installation of positioning frame (6): When the concrete of the cable saddle support pier is poured to the second to last layer, a hoisting device is used to hoist the single rod of the positioning frame (6) to the cable saddle support pier, and then assemble it into a positioning frame (6) and use it as the stiffening skeleton of the cable saddle support pier. Then pour the concrete of the second to last layer of the cable saddle support pier. Base plate (7) hoisting: Before pouring the concrete of the top layer of the cable saddle support, first adjust the top elevation, inclination angle and longitudinal and transverse center lines of the positioning frame (6) according to the design position, then use the hoisting device to hoist the base plate (7) to the top of the cable saddle support, then put the anchor bolts (8) on the base plate (7), then hoist the base plate (7) into the positioning frame (6) and fix it to the positioning frame (6), and finally pour the concrete of the top layer of the cable saddle support. The lower part of the base plate (7) is embedded in the cable saddle support. Installation of the sliding device: The sliding device includes an inclined sliding frame assembly (10) and a gantry assembly (9). The gantry assembly (9) is installed on both sides and above the base plate (7) facing the tunnel wall. Both the inclined sliding frame assembly (10) and the gantry assembly (9) are installed by assembling single rods inside the tunnel. The single rods of the inclined sliding frame assembly (10) and the gantry assembly (9) are hoisted to the installation position inside the tunnel by a hoisting device. The installation sequence is from bottom to top and from inside the tunnel to outside the tunnel. Lifting of cable saddle support (13): At the tunnel entrance, the cable saddle support (13) is lifted by a crane onto the inclined slide frame assembly (10) inside the tunnel. Then, the cable saddle support (13) is gradually lowered along the slide rail of the inclined slide frame assembly (10) to the gantry assembly (9) by the reverse traction force applied by the winch outside the tunnel. Then, it is lifted by the gantry assembly (9) and installed on the base plate (7). Cable saddle hoisting: At the tunnel entrance, the cable saddle body is hoisted onto the inclined slide frame assembly (10) inside the tunnel using a crane. Then, the cable saddle body is gradually slid down the slide rail of the inclined slide frame assembly (10) to the gantry assembly (9) using a winch outside the tunnel to apply reverse traction force. After that, it is hoisted by the gantry assembly (9) and installed onto the cable saddle support (13) and fixed to the cable saddle support (13), thus completing the hoisting of the cable saddle.

2. The method for constructing a suspension bridge with cable-stayed saddle supports in a deep, steeply inclined tunnel according to claim 1, characterized in that: Before pouring the top concrete of the cable saddle support pier, the top surface of the base plate (7) is wrapped and covered to prevent contamination of the groove. After the pouring is completed, the exposed contaminants on the base plate (7) are cleaned up in time.

3. The method for constructing a suspension bridge with cable-stayed saddle supports in a deep, steeply inclined tunnel according to claim 1, characterized in that: After the base plate (7) is fixed to the positioning frame (6), the steel bars of the top layer of the cable saddle support are tied. When tying the steel bars, the anchor bolts (8) and the base plate (7) must be avoided. It is forbidden to move the anchor bolts (8) and the base plate (7).

4. The method for constructing a suspension bridge with cable saddle supports in a deep, steeply inclined tunnel using the sliding hoisting method according to claim 1, characterized in that: Rollers are installed at the bends of the traction rope (5) at the bottom of the tunnel to facilitate the bends of the traction rope (5) and reduce wear on the traction rope (5).

5. The method for constructing a suspension bridge with cable-stayed saddle supports in a deep, steeply inclined tunnel according to claim 1, characterized in that: When hoisting the cable saddle support (13), a PTFE plate is placed under the cable saddle support (13) as a sliding shoe to slide into position on the inclined slide assembly (10). At the same time, limit blocks are installed on both sides of the bottom of the cable saddle support (13) to prevent the cable saddle support (13) from shifting to the side or even falling off during the sliding process. Similarly, the same operation is performed when hoisting the cable saddle body.

6. The method for constructing a suspension bridge with cable-stayed saddle supports in a deep, steeply inclined tunnel according to claim 1, characterized in that: After the base plate (7) is hoisted, a pad is placed on the base plate (7). The upper surface of the pad is inclined, and the inclination angle of the inclined surface is the same as the inclination angle of the slide rail of the inclined slide assembly (10). The thickness of the pad is the same as the thickness of the cable saddle support (13). The upper surface of the pad is connected to the lower end of the slide rail of the inclined slide assembly (10) at one end. When the cable saddle support (13) is hoisted, the cable saddle support (13) slides directly from the inclined slide assembly (10) onto the pad. Then the gantry assembly (9) lifts the cable saddle support (13) vertically. Then the pad is removed. The cable saddle support (13) is lowered vertically onto the base plate (7) and fixedly connected to the base plate (7). After the cable saddle support (13) is installed, the upper surface of the cable saddle support (13) near the inclined slide assembly (10) is connected to the lower end of the slide rail of the inclined slide assembly (10). When the cable saddle body is hoisted, the cable saddle body is directly slid from the inclined slide assembly (10) onto the cable saddle support (13). Then, the gantry assembly (9) lifts the cable saddle support (13) vertically, adjusts its position, and lowers it onto the cable saddle support (13). Finally, the cable saddle body is fixedly connected to the cable saddle support (13).

7. The method for constructing a suspension bridge with cable-stayed saddle supports in a deep, steeply inclined tunnel according to claim 6, characterized in that: The pad is provided in multiple pieces, and the multiple pads are fixed to each other by screws (15) and nuts (16).

8. The method for constructing a suspension bridge with cable-stayed saddle supports in a deep, steeply inclined tunnel according to claim 1, characterized in that: The sliding device also includes a backrest frame assembly (11), which is installed on the side of the base plate (7) facing away from the opening. A jack (12) is provided on the side of the backrest frame assembly (11) facing the opening. The jack (12) is used to precisely adjust the deviation of the cable saddle.

9. The method for constructing a suspension bridge with cable-stayed saddle supports in a deep, steeply inclined tunnel according to claim 1, characterized in that: The positioning frame (6) includes multiple support rods, each support rod including a sleeve (61) and a rod (62). One end of the rod (62) is threaded to one end of the sleeve (61). Multiple sleeves (61) are fixedly connected to each other by a crossbeam. The upper end of each rod (62) is connected to a support plate (65) by an adjustment mechanism (64). The adjustment mechanism (64) can adjust the tilt angle of the support plate (65). The upper end of the rod (62) abuts against the support plate (65).

10. The method for constructing a suspension bridge with cable-stayed saddle supports in a deep, steeply inclined tunnel according to claim 9, characterized in that: The adjusting mechanism (64) includes multiple collars (641) and multiple adjusting rods (642). The collars (641) are sleeved on the outside of the rods (62) and threadedly connected to the rods (62). The multiple adjusting rods (642) are arranged around the circumference of the collars (641). The two ends of the adjusting rods (642) are respectively hinged to the collars (641) and the support plate (65). The length of the adjusting rods (642) is adjustable. The adjusting rods (642) include two end rods (6421) and a connecting rod (6422). The connecting rod (6422) is located between the two end rods (6421). The two ends of the connecting rod (6422) are respectively threadedly connected to the two end rods (6421).

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