GB2614795A

GB2614795A - Swing installation construction method for tunnel anchorage splay saddle at a restricted site

Info

Publication number: GB2614795A
Application number: GB2217085.6A
Authority: GB
Inventors: Zahng Yinghong; Wang Bao; Wang Guiyu; Liu Ciwen; Zhou Wen; You Wei; Zhang Qiqiao; Jiang Youzhi; Meng Qing; Yang Qing; Li Tao; Liu Tao
Original assignee: China Railway Guangzhou Engineering Group Co Ltd CRECGZ; CRECGZ Bridge Engineering Co Ltd
Current assignee: China Railway Guangzhou Engineering Group Co Ltd CRECGZ; CRECGZ Bridge Engineering Co Ltd
Priority date: 2021-11-16
Filing date: 2022-11-16
Publication date: 2023-07-19
Anticipated expiration: 2042-11-16
Also published as: CN114164758A; GB202217085D0; CN114164758B; GB2614795B

Abstract

A swing method for installing a splay saddle 4 at a restricted site comprises the following steps: marking a hoisting point 21 below a frame system 1 and fixing a rack winch 5 to the ground; moving the saddle to a hoisting area on a trailer 3; connecting the saddle to a hoisting winch 13 on the frame system and to the rack winch and operating the hoisting winch to lift the saddle from the trailer; operating the hoisting and rack winches to lift, swing and land the saddle; operating the hoist and rack winches to swing the saddle gradually to the hoisting point; operating the winches to lift the saddle to the height of a splay saddle buttress 7; and, translating the saddle along the frame system and connecting the saddle to the buttress. A buffer device 6 may be provided which slides along a track installed between the rack winch and the hoisting point. The saddle may land on the buffer as it is swung to the hoisting point.

Description

SWING INSTALLATION CONSTRUCTION METHOD FOR TUNN EL ANCHORAGE SPLAY SADDLE AT A RESTRICTED SITE

TECHNICAL FIELD

100011 The present application relates to a technical field of constnicting engineering tunnel anchorage and, in particular, relates to a swing method for installing a splay saddle of a tunnel anchorage at a restricted site.

BACKGROUND ART

[0002] With the construction of the transportation infrastructure project in succession, the suspension bridge stands out from the bridges of various systems due to the characteristics such as a low material consumption, a light dead weight, and a strong adaptability to complex terrain and geological conditions. The mainly bearing component of the suspension bridge is the main cable. In order to ensure the anchorage reliability of the main cable on the anchorage, it is generally realized by increasing the anchorage area of the main cable. Splay saddles are generally adopted to divide the main cable into a plurality of divergent strands. Each strand is anchored on the anchorage. The majority of the suspension bridge anchorage systems are designed as a tunnel anchorage, which is characterized in having a long and narrow space and a specific dip angle.

[0003] In the related technology, a splay saddle buttress is mounted in the tunnel, and a frame system is mounted at the tunnel. The frame system can conduct a horizontal movement and a hoisting. A hoisting initiating end of the frame system extends over the ground. The splay saddle is transported under the hoisting initiating end of the frame system by a flatbed trailer. Then the splay saddle is vertically hoisted by the frame system until the splay saddle moves to the same height with the splay saddle buttress. The splay saddle is horizontally moved to the splay saddle buttress to complete the final splay saddle mounting steps.

[0004] In the view of the above-mentioned related technology, there are following deficiencies: in an actual construction process, when encountered with a narrow and dangerous mountain road, a bulky flatbed trailer cannot be moved and positioned smoothly under the frame system due to restricted space, leading to a difficult and inefficient hoisting of the splay saddle. Therefore, there is still room for improvement.

SUMMARY

[0005] In order to facilitate moving a splay saddle toward a frame system for hoisting, the present application provides a swing method for installing a splay saddle of a tunnel anchorage at a restricted site.

[0006] A swing method for installing a splay saddle of a tunnel anchorage at a restricted site provided in the present application adopts the following technical solution.

A swing method for installing a splay saddle of a tunnel anchorage at a restricted site includes the following steps: Step Si: marking a splay saddle hoisting point under a hoisting initiating end of a frame system, and fixing a rack winch on a ground; Step S2: placing a splay saddle on a rear of a flatbed trailer, and backing the flatbed trailer into a hoisting area; Step S3: fixedly connecting a sling of the frame system and a sling of the rack winch to two ends of the splay saddle body, respectively, starting the vertical hoisting winch to lift up an end of the splay saddle body, lifting up the whole of the splay saddle body with assistance of the rack winch, and driving the flatbed trailer out of a hoisting area; Step S4: restarting the vertical hoisting winch to lift the splay saddle body to a first height under a traction of a connection rope of the vertical hoisting winch, shutting down the vertical hoisting winch, starting the rack winch to slowly release a connection rope in a constant speed, so that the splay saddle body is swung downwards until landing safely; Step S5repeating Step S4 so that the splay saddle body is gradually swung to the splay saddle hoisting point; Step S6: starting the rack winch and the vertical hoisting winch at a same time to lift up the splay saddle body in a vertical direction until the splay saddle reaches a same height as that of a splay saddle buttress; and Step S7: translating the splay saddle body toward the splay saddle buttress by using the frame system, and connecting the splay saddle body to the splay saddle buttress.

[0007] With the above technical solution, the splay saddle body is placed at the rear of the flatbed trailer, and the flatbed trailer is backed into the hoisting area, so as to reduce the distance between the splay saddle body and the hoisting point of the splay saddle body and reduce the times of swinging as possible. The rack winch is anchored on the ground. The splay saddle body is gradually moved to the splay saddle hoisting point with the assistance of the rack winch and the vertical hoisting winch, so as to move the splay saddle body to the destination safely and stably. The splay saddle body may be stably moved to the splay saddle buttress and be mounted directly by the vertical hoisting and the horizontal movement, which not only solves the problem of the splay saddle approach using the flatbed trailer, but also reducing the shake situation of the splay saddle in the inclined hoisting, facilitating the stable movement of the splay saddle to the splay saddle hoisting point under the stable hoisting condition.

100081 In some embodiments, in the step S2, the flatbed trailer is stopped when it moves the splay saddle body to a connection point between the rack winch and the splay saddle hoisting point.

[0009] With the above technical solution, the vertical hoisting winch, the rack winch and the splay saddle body form a vertical plane, the splay saddle is moved to this plane, so that the splay saddle is always on this vertical plane when hoisting, facilitating the stability improvement of the splay saddle when hoisting.

[0010] In some embodiments, in the step SI, a track is anchored on the ground, so that a direction from the rack winch to the splay saddle hoisting point is in line with a length direction of the track, and a tail end of the track extends to the splay saddle hoisting point. A buffer device is sl dably mounted on the track and kept under the splay saddle body during swinging of the splay saddle in the step S4.

[0011] With the above technical solution, it can avoid that the splay saddle body abuts against and collide with the ground during swing downwards. The buffer device plays a role of buffering, which is conductive to reduce the probability of splay saddle body damage caused by the friction during swing.

100121 In some embodiments, before the lifting up of the splay saddle body in the step S3, the rack winch is started up, so that the connection rope of the rack winch is tightened. Then the vertical hoisting winch is started up, so that the splay saddle is completely lifted off the flatbed trailer.

[0013] With the above technical solution, a tension force is provided at the rear of the splay saddle body, which is conductive to improve the stability of the splay saddle body when hoisting from the rear of the flatbed trailer.

[0014] In some embodiments, the buffer device includes a movable seat, a buffer plate on the movable seat and a plurality of buffer springs provided between the movable seat and the buffer plate.

[0015] With the above technical solution, when the buffer plate bears the pressure during the swing of the splay saddle body, the buffer plate is moved downwards, and forces the buffer springs to contract. The buffer spring plays a role of buffering during the contract process, which is conductive to improve the safety of the splay saddle body during swing.

[0016] In some embodiments, a plurality of guiding rods are vertically fixed on the movable seat, in which the plurality of guiding rods vertically penetrate the buffer plate, and each buffer spring is sleeved on each corresponding guiding rod.

[0017] With the above technical solution, the guiding rod plays a role of guiding the moving direction for buffer plate, and limiting the buffer spring, which is conductive to improve the stability of buffer device under pressure.

[0018] In some embodiments, a baffle is hinged on each of four sides of the buffer plate, four driving assemblies are mounted on the movable seat, four driving assemblies correspond to four baffles respectively, and the driving assemblies are configured for driving a corresponding baffle to swing up and down.

[0019] Directly swinging the splay saddle toward the buffer plate renders it difficult to land a landing surface of the splay saddle body horizontally on the ground. In the above technical solution, the baffle is driven by the driving assembly to turn up, so that four baffles form a protective fence around the buffer plate, which is conductive to reduce the probability of eversion for the splay saddle.

[0020] In some embodiments, a driving column is vertically penetrates the movable seat is fixed at a center of a lower surface of the buffer plate, the driving assembly includes a vertical gear rack vertically fixed on a sidewall of the driving column, a gear set mounted on an upper surface of the movable seat, a horizontal gear rack horizontally and slidably connected to the upper surface of the movable seat and a driving rod hinged with a tail end of the horizontal gear rack. An end of the driving rod away from the horizontal gear rack is hinged with a lower side of the corresponding baffle. The gear has a horizontal axis, and the gear set is meshed with both the vertical gear rack and the horizontal gear rack of a same driving assembly.

[0021] With the above technical solution, when the buffer plate is under pressure, the driving column is moved downwards. The horizontal gear rack is moved towards the outside of the movable seat through a meshing transmission between the vertical gear rack and the gear set and a meshing transmission between the gear set and the horizontal gear rack. The baffle swings upwards under the linkage action of the gear and the driving rod, which is conductive to fast form the protective fence when the splay saddle body falls on the buffer plate.

BRIEF DESCRIPTION OF THE DRAWINGS

[0022] FIG. 1 is a schematic diagram of a splay saddle hoisting preparation process in a swing method for installing a splay saddle of a tunnel anchorage at a restricted site according to an embodiment of the present application [0023] FIG. 2 is a structural schematic diagram of a buffer device in a swing method for installing a splay saddle of a tunnel anchorage at a restricted site according to an embodiment of the present application.

[0024] FIG.3 is an enlarged schematic diagram of Portion Am FIG.2.

[0025] FIG.4 is a schematic diagram of a swing hoisting process of a splay saddle body in a swing method for installing a splay saddle of a tunnel anchorage at a restricted site according to an embodiment of the present application.

[0026] FIG.5 is a schematic diagram of a vertical hoisting process of a splay saddle in a swing method for installing a splay saddle of a tunnel anchorage at a restricted site according to an embodiment of the present application [0027] Listing of reference signs: 1 frame system; 11 vertical frame; 12 horizontal frame; 13 vertical hoisting winch; 14 mobile trolley; 2 ground; 21 splay saddle hoisting point; 3 flatbed trailer; 4 splay saddle body; 5 rack winch; 6 buffer device; 61 buffer plate; 611 driving column; 612 baffle; 62 movable seat; 621 guiding rod; 63 buffer spring; 7 splay saddle buttress; 8 driving assembly; 81 vertical gear rack; 82 gear set; 83 horizontal gear rack; and 84 driving rod.

DETAILED DESCRIPTION

[0028] The present application will be further described in detail below in combination with FIGs 1-5.

[0029] An embodiment in the present application provides a swing method for nstalling a splay saddle of a tunnel anchorage at a restricted site. Referring to FIG.1, a swing method for installing a splay saddle of a tunnel anchorage at a restricted site includes the following steps.

Step Sl: construction preparation. A splay saddle hoisting point 21 is marked under a hoisting initiating end of a frame system 1. A track is anchored on a ground 2 through an embedded member. A tail end of the track extends to the splay saddle hoisting point 21. A buffer device 6 is mounted on the track. A rack winch S is fixed on the ground 2 through an embedded member. A direction from the rack winch 5 to the splay saddle hoisting point 21 is in line with a length direction of the track.

[0030] In this embodiment, the frame system 1 includes a vertical frame II, a horizontal frame 12, a mobile trolley 14 and a vertical hoisting winch 13. The horizontal frame 12 is fixedly connected on an upper end of the vertical frame 11. A hoisting initiating end of the horizontal frame 12 extends over the splay saddle hoisting point 21. A tail end of the horizontal frame 12 is positioned over the splay saddle buttress 7. The mobile trolley II is slidably connected to the horizontal frame 12. And the vertical hoisting winch 13 is fixedly connected above the mobile trolley 14.

[0031] Referring to FIG.2 and FIG.3, the buffer device 6 includes a movable seat 62, a buffer plate 61 on the movable seat 62 and a plurality of buffer springs 63 positioned between the movable seat 62 and the buffer plate 61. The movable seat 62 slides along the length direction of the track. Four guiding rods 621 are fixed on an upper end of the movable seat 62. Four guiding rods 621 vertically penetrate the buffer plate 61. Four buffer springs 62 are sleeved on four guiding rods 621 respectively. A baffle 612 is hinged on each of four sides of the buffer plate 61. Four driving assemblies 8 are mounted on the movable seat 62 for respectively driving four baffles 612 to swing up and down.

[0032] A driving column 611 is fixed at the middle of a lower surface of the buffer plate 61. The driving column 611 vertically penetrates the movable seat 62. When the buffer plate 61 is under pressure, the buffer springs 63 is contracted, playing a role of buffering. Four driving assemblies 8 are respectively positioned at four sides of the driving columns 611. The driving assembly 8 includes a vertical gear rack 81 vertically fixed on a sidewall of the driving column 611, a gear set 82 mounted on the upper surface of the movable seat 62, a horizontal gear rack 83 horizontally slidably connected to the upper surface of the movable sear 62 and a driving rod 84 hinged with the tail end of the horizontal gear rack 83. The tail end of the horizontal gear rack 83 is towards the outside of the movable seat 62. An end of the driving rod 84 away from the horizontal gear rack 83 is hinged with a lower side of the corresponding baffle 612. In particular, the axial of the gear set 82 has a horizontal axis, ant the gear set 82 is meshed with the vertical gear rack 81 and the horizontal gear rack 83 of the same driving assembly 8. When the buffer plate 61 is under pressure, the driving column 611 is moved downwards. The horizontal gear rack 83 is moved towards the outside of the movable seat 62 through a meshing transmission between the vertical gear rack 81 and the gear set 82 and a meshing transmission between the gear set 82 and the horizontal gear rack 83. The baffle 612 swings upwards under the linkage action of the driving rod 84. Four baffles 612 form a protective fence around the buffer plate 61. Since the splay saddle body 4 moves to the buffer plate 61 in a swing manner, the landing surface splay saddle body 4 is difficult to land horizontally. The protective fence can reduce the probability of the eversion of the splay saddle body 4, which is conductive to improve the stability. When the pressure on the buffer plate 61 disappears, the buffer plate 61 is moved upwards under an elastic force of the buffer spring 63 to drive the driving assembly 8 to operate at the same time, so that the baffle 612 can swing to a horizontal position.

[0033] Step S2: splay saddle approach. The splay saddle body 4 is placed on a rear portion of flatbed trailer 3, and the flatbed trailer is backed into a hoisting area from an anchorage side ramp.

The flatbed trailer 3 is stopped when the splay saddle body is moved to a connection point between the rack winch 5 and the splay saddle hoisting point 2L [0034] Step S3: splay saddle hoisting preparation. A sling of the vertical hoisting winch 13 and a sling of the rack winch 5 are fixedly connected to two ends of the splay saddle body 4 respectively.

Then the vertical hoisting winch 5 is started up, so that the connection rope of the rack winch 5 is tightened. Then the vertical hoisting winch 13 is started up. The vertical hoisting winch 13 lifts up an end of the splay saddle body 4 and lifts the splay saddle body 4 off with assistance of the rack winch 5 Finally, the flatbed trailer 3 is driven out of the hoisting area.

[0035] Step S4: swing hoisting of the splay saddle. Referring to FIG.3 and FIG.4, the vertical hoisting winch 13 is started up. The splay saddle body 4 is lifted to 2m above the ground under a traction of a connection rope of the vertical hoisting winch 13. Then the vertical hoisting winch 13 is shut down, and the rack winch 5 is started up to slowly release the connection rope in a constant speed. The splay saddle body 4 is swung downwards. The buffer device 6 is moved in the downward swing process of the splay saddle body 4 until the splay saddle body 4 falls on the buffer plate 61, so that the buffer device 6 is always positioned under the splay saddle body 4. The buffer plate 61 is forced to move downwards. The baffles 612 around the buffer plate 61 is swung upwards under the drive of the driving assembly 8, so as to form a protective fence around the buffer plate 61, which is conductive to reduce the probability of the eversion of the splay saddle. [0036] Step S5repeating Step 54 until the splay saddle body 4 is moved to the splay saddle hoisting point 21.

[0037] Step 56: vertical hoisting of the splay saddle. Referring to FIGS, the rack winch 5 and the vertical hoisting winch 13 are started up at the same time, so as to drive the splay saddle body 4 moving upwards in a vertical direction until the splay saddle body 4 is moved to the same height as that of a splay saddle buttress 7.

[0038] Step S7: horizontal hoisting of the splay saddle. The mobile trolley 14 is started up. The splay saddle body 4 is moved to the play saddle buttress 7. The connection between the splay saddle body 4 and the rack winch 5, and the connection between the splay saddle body 4 and the vertical hoisting winch H are released to connect the splay saddle body 4 to the splay saddle buttress 7. The slings of the rack winch 5 and the vertical hoisting winch 13 are connected to each other. The vertical hoisting winch 13 is returned along the original route under the drive of the mobile trolley 14. The sling of the rack winch 5 is placed back on the ground 2 safely, so as to facilitate hoisting other components of the splay saddle.

[0039] The above are the preferred embodiments of the present application, which are not intended to limit the protection scope of the present application. Therefore, all equivalent changes made according to the structure, shape and principle of the present application should be covered within the protection scope of the present application

Claims

WHAT IS CLAIMED IS: 1. A swing method for installing a splay saddle of a tunnel anchorage at a restricted site, characterized by comprising the following steps: Step Si: marking a splay saddle hoisting point (21) under a hoisting initiating end of a frame system (I), and fixing a rack winch (5) on a ground (2); Step S2: placing a splay saddle body (4) on a flatbed trailer (3), and backing the flatbed trailer (3) into a hoisting area; Step S3: fixedly connecting a sling of a vertical hoisting winch (13) of the frame system (1) and a sling of the rack winch (5) to two ends of the splay saddle body (4), respectively, starting the vertical hoisting winch (13) to lift up an end of the splay saddle body (4), lifting up the whole of the splay saddle body (4) with assistance of the rack winch (5), and driving the flatbed trailer (3) out of a hoisting area; Step S4: restarting the vertical hoisting winch (13) to lift the splay saddle body (4) to a first height, shutting down the vertical hoisting winch (13), starting the rack winch (5) to slowly release a connection rope at a constant speed, so that the splay saddle body (4) is swung downwards until land ng safely; Step S5: repeating Step 54 so that the splay saddle body (4) is gradually swung to the splay saddle hoisting point (21); Step 56: starting the rack winch (5) and the vertical hoisting winch (13 at a same time to lift up the splay saddle body (4) in a vertical direction until the splay saddle body (4) reaches a same height as that of a splay saddle buttress (7); and Step S7: translating the splay saddle body (4) toward the splay saddle buttress (7) by using the frame system (1), and connecting the splay saddle body (4) to the splay saddle buttress (7).
2. The swing method for installing a tunnel anchorage at a restricted site according to claim 1, characterized in that, in the step S2, the flatbed trailer (3) is stoped when it moves the splay saddle body (4) to a connection point between the rack winch (5) and the splay saddle hoisting point (21).
3. The swing method for installing a tunnel anchorage at a restricted site according to claim 1, characterized in that, in the step Si, a track is anchored on the ground (2) so that a direction from the rack winch (5) to the splay saddle hoisting point (21) is in line with a length direction of the track and a tail end of the track extends to the splay saddle hoisting point (21), and a buffer device (6) is slidably mounted on the track, and kept under the splay saddle body (4) during the swinging of the splay saddle in the step S4.
4. The swing method for installing a tunnel anchorage at a restricted site according to claim 1, characterized in that, before lifting up the splay saddle body (4) in the step S3, the rack winch (5) is started up, so that a connection rope of the rack winch (5) is tightened, and then the vertical hoisting winch (13) is started up, so that the splay saddle body (4) is completely lifted off the flatbed trailer (3).
5. The swing method for installing a tunnel anchorage at a restricted site according to claim 3, characterized in that, the buffer device (6) comprises a movable seat (62), a buffer plate (61) on the movable seat (62) and a plurality of buffer springs (63) provided between the movable seat (62) and the buffer plate (61).
6. The swing method for installing a tunnel anchorage at a restricted site according to claim 5, characterized in that, a plurality of guiding rods (621) are vertically fixed on the movable seat (62), wherein the plurality of guiding rods (621) vertically penetrate the buffer plate (61), and each buffer spring (63) is sleeved on each corresponding guiding rod (621).
7. The swing method for installing a tunnel anchorage at a restricted site according to claim 5, characterized in that, a baffle (612) is hinged on each of four sides of the buffer plate (61), four driving assemblies (8) are mounted on the movable seat (62), four driving assemblies (8) correspond to four baffles (612) respectively, and the driving assemblies (8) are configured for driving a corresponding baffle (612) to swing up and down.
8. The swing method for installing a tunnel anchorage at a restricted site according to claim 7, characterized in that, a driving column (611) vertically penetrates the movable seat (62) is fixed at a center of a lower surface of the buffer plate (61), the driving assembly (8) comprises a vertical gear rack (81) vertically fixed on a sidewall of the driving column (611), a gear set (82) mounted on an upper surface of the movable seat (62), a horizontal gear rack (83) horizontally and slidably connected to the upper surface of the movable seat (62) and a driving rod (84) hinged with a tail end of the horizontal gear rack (83), an end of the driving rod (84) away from the horizontal gear rack (83) is hinged with a lower side of a corresponding baffle (612), an axial of the gear set (82) has a horizontal axis, and the gear set (82) meshes with both the vertical gear rack (81) and the horizontal gear rack (83) of a same driving assembly (8).