Multi-stage super-long traction system and method suitable for erection of main cable of tunnel anchor suspension bridge on two banks

Abstract

The invention belongs to the technical field of traction construction of main cables of tunnel type anchorage suspension bridges on both banks, and particularly relates to a multi-stage super-long traction system and method suitable for erection of the main cables of the tunnel type anchorage suspension bridges on both banks. The system comprises a main cable super-long traction module and an auxiliary traction module, the main cable super-long traction module comprises two main cable winches, a steering wheel and a main cable traction steel rope, the main cable winches are located on one side of an anchorage hole of a shore A of the suspension bridge, the steering wheel is located on a rear anchor face of a shore B of the suspension bridge, one end of the main cable traction steel rope is connected with one main cable winch, and the other end of the main cable traction steel rope is connected with the auxiliary traction module. And the auxiliary traction module comprises two auxiliary winches and an auxiliary traction steel rope, and the two auxiliary winches are located on the two sides of an anchorage hole of the A bank of the suspension bridge. Through the main cable super-long traction module and the auxiliary traction module, operation can be conducted under the condition that the traction space is limited, and full coverage of main cable erection of the tunnel type anchorage suspension bridge on the two banks is achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of main cable traction construction of a cross-strait tunnel-type anchor suspension bridge, and particularly relates to a multi-stage super-long traction system and method suitable for erecting main cables of a cross-strait tunnel-type anchor suspension bridge. Background Art

[0002] At present, the anchorage forms of long-span suspension bridges are generally divided into two types: gravity anchorage on both sides and gravity anchorage on one side + tunnel anchorage on the other side. For tunnel anchorage, the difficulty of pulling the main cable into the anchorage can be solved by setting a traction system slewing wheel device on one side of the tunnel anchorage. However, this method is only applicable to suspension bridges with tunnel anchors on one side, and is no longer applicable to suspension bridges with tunnel anchors on both sides.

[0003] At the same time, the main cable laying machine of the suspension bridge is generally set up in the outdoor site of the tunnel anchor on the cable laying bank. The terrain conditions on both sides of the tunnel anchor are steep, the tunnel slope is steep, and the main cable traction operation space is limited. The site behind the anchor can only meet the layout space of necessary equipment such as the cable laying machine. After the main cable anchor head on the opposite bank is temporarily anchored, the cable laying bank cannot provide sufficient space to pull the main cable tail end anchor head in the cable laying machine; if a tower crane is used to pull the main cable anchor head vertically or horizontally, it will cause serious consequences such as main cable drumming and breakage. Summary of the invention

[0004] In view of the above problems, the purpose of the present invention is to provide a multi-stage ultra-long traction system and method suitable for the erection of the main cable of the tunnel-anchored suspension bridge on both sides of the river. The system can be used in conditions where the construction site in front of the anchorage hole of the tunnel-type anchored suspension bridge on both sides of the river is small and the traction space is limited. It has strong operability and can achieve full coverage of the erection of the main cable of the tunnel-type anchored suspension bridge on both sides of the river.

[0005] The technical solution of the present invention is: a multi-stage super-long traction system suitable for the main cable erection of a tunnel anchor suspension bridge on both sides of the river, comprising a main cable super-long traction module and an auxiliary traction module, wherein the main cable super-long traction module comprises two main cable winches, a steering wheel and a main cable traction steel rope, wherein the two main cable winches are located on one side of the anchor hole of the suspension bridge A bank, the steering wheel is located on the rear anchor surface of the suspension bridge B bank, one end of the main cable traction steel rope is connected to a main cable winch, and the other end passes through the top of the main tower of the tunnel anchor suspension bridge on both sides of the river in sequence The auxiliary traction module comprises two auxiliary winches and auxiliary traction steel ropes. The two auxiliary winches are located on both sides of the anchor hole of the suspension bridge A bank. Both ends of the auxiliary traction steel rope are respectively connected to the auxiliary winches. A cable-releasing machine is also provided on the side of the anchor hole of the suspension bridge A bank away from the main cable winch. The main cable strand is wound on the cable-releasing machine. Main cable strand anchor heads and main cable strand tail end anchor heads are provided at both ends of the main cable strand.

[0006] A main cable traction puller is provided on the main cable traction steel rope, and an auxiliary puller is provided on the auxiliary traction steel rope.

[0007] A main cable traction steel rope roller is provided at the turning point of the designed traction path of the main cable strand.

[0008] The distance between the cable-laying machine and the anchor surface in front of bank A is less than the length of the remaining main cable strands in the cable-laying machine when the anchor head of the main cable strands is pulled to the anchor surface in front of bank B.

[0009] Auxiliary traction steel rope rollers are provided at the turning points of the traction path of the auxiliary traction steel rope.

[0010] A traction method for erecting the main cable of a cross-strait tunnel anchor suspension bridge, using the multi-stage ultra-long traction system for erecting the main cable of a cross-strait tunnel anchor suspension bridge as described above, comprising the following steps: S1: Arrange the main cable extra-long traction module and the auxiliary traction module. The traction range of the main cable extra-long traction module is from the anchor hole of bank A to the rear anchor surface of bank B, and the traction range of the auxiliary traction module is from the cable-laying machine to the front anchor surface of bank A; S2: The main cable strand anchor head is connected to the auxiliary traction module, and then the auxiliary traction module pulls the main cable strand anchor head to the anchor hole of bank A, and then the main cable strand anchor head is separated from the auxiliary traction module; S3: The main cable extra-long traction module connects the main cable strand anchor head after being detached in step S, and then the main cable extra-long traction module tractions the main cable strand anchor head to the anchor surface in front of shore B; the main cable extra-long traction module continues to traction the main cable strand anchor head until the main cable strand tail end anchor head is pulled out from the cable-laying machine; S4: the auxiliary traction module connects the main cable strand tail end anchor head that is detached from the cable-laying machine in step S, and then the main cable super-long traction module pulls the main cable strand anchor head from the rear anchor surface of bank B to the front anchor surface of bank B. At the same time, the auxiliary traction module pulls the main cable strand tail end anchor head to the front anchor surface of bank A at the same speed; when the main cable strand anchor head reaches the front anchor surface of bank B, the main cable super-long traction module is released, and then the released main cable strand anchor head is connected to the anchor point at the front anchor surface of bank B by using a hoisting device; S5: After the auxiliary traction module continues to pull the anchor head at the tail end of the main cable strand to the front anchor surface of Bank A, the auxiliary traction module is released, and then the lifting equipment is used to connect the anchor head at the tail end of the main cable strand after release to the anchor point at the front anchor surface of Bank A to complete the installation of the main cable.

[0011] In the steps S4 and S5, the hoisting equipment is installed at the front anchorage room of Bank A and the front anchorage room of Bank B respectively.

[0012] The technical effects of the present invention are as follows: 1. The present invention uses an extra-long main cable traction module and an auxiliary traction module. The traction range of the extra-long main cable traction module is from the anchor hole of bank A to the rear anchor surface of bank B, and the traction range of the auxiliary traction module is from the cable-laying machine to the front anchor surface of bank A. This can achieve operation under conditions where the construction site in front of the anchor hole of the tunnel-type anchored suspension bridge on both sides is small and the traction space is limited. It has strong operability and can achieve full coverage of the main cable installation of the tunnel-type anchored suspension bridge on both sides; 2. The distance from the cable-laying machine to the front anchor surface of bank A is less than the length of the remaining main cable strands in the cable-laying machine when the anchor head of the main cable strand reaches the front anchor surface of bank B, which solves the problem that the anchor head at the tail end of the main cable on bank A cannot be completely pulled out.

[0013] The following is a further description with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a structural elevation view of a multi-stage super-long traction system suitable for erecting main cables of a cross-strait tunnel anchor suspension bridge according to an embodiment of the present invention.

[0015] Figure 2 This is a structural plan view of a multi-stage super-long traction system suitable for erecting main cables of a cross-strait tunnel anchor suspension bridge according to an embodiment of the present invention.

[0016] Figure 3 This is a plan view of the auxiliary traction module connected to the main cable strand anchor head according to an embodiment of the present invention.

[0017] Figure 4 This is a plan view of the auxiliary traction module of an embodiment of the present invention pulling the anchor head of the main cable strand to the anchor hole on bank A.

[0018] Figure 5 This is a plan view of the anchor head of the main cable strand used for traction of the super-long traction module of the main cable according to an embodiment of the present invention.

[0019] Figure 6 This is a plan view of the anchoring surface before the main cable super-long traction module pulls the main cable strand anchor head to the B shore according to an embodiment of the present invention.

[0020] Figure 7 This is a plan view of the main cable extra-long traction module of an embodiment of the present invention traction of the main cable strand anchor head until the main cable strand tail end anchor head is separated from the cable laying machine.

[0021] Figure 8 This is a plan view of the auxiliary traction module connected to the anchor head at the tail end of the main cable strand according to an embodiment of the present invention.

[0022] Fig. 9 This is a plan view of the main cable extra-long traction module + auxiliary traction module cooperating to pull the main cable strand anchor head to the anchor surface in front of bank B according to an embodiment of the present invention.

[0023] Figure markings: 1-anchor hole opening of bank A; 2-anchor surface behind bank B; 3-rope-releasing machine; 4-anchor surface in front of bank A; 5-anchor head of main cable strand; 6-anchor surface in front of bank B; 7-anchor head at the tail end of main cable strand; 8-main cable winch; 9-steering wheel; 10-main cable puller; 11-main cable traction steel rope; 12-main cable traction steel rope roller; 13-auxiliary winch; 14-auxiliary puller; 15-auxiliary traction steel rope; 16-auxiliary traction steel rope roller; 18-front anchor room of bank A; 19-front anchor room of bank B; 20-gantry; 21-main tower; 22-anchor hole opening of bank B. Implementation

[0024] Example 1 Figures 1 to 9 As shown, a multi-stage extra-long traction system suitable for the main cable erection of a cross-strait tunnel anchor suspension bridge includes a main cable extra-long traction module and an auxiliary traction module. The main cable extra-long traction module includes two main cable winches 8, a steering wheel 9 and a main cable traction steel rope 11. The two main cable winches 8 are located on one side of the anchor hole 1 of the suspension bridge A bank, and the steering wheel 9 is located on the rear anchor surface 2 of the suspension bridge B bank. One end of the main cable traction steel rope 11 is connected to a main cable winch 8, and the other end passes through the gantry 20 on the top of the main tower 21 of the cross-strait tunnel anchor suspension bridge in sequence, bypasses the main tower 21, and passes through the main tower 21 of the cross-strait tunnel anchor suspension bridge. The steering wheel 9 is connected to another main cable winch 8 at the rear, and the auxiliary traction module includes two auxiliary winches 13 and auxiliary traction steel ropes 15. The two auxiliary winches 13 are located on both sides of the anchor hole 1 on the bank A of the suspension bridge. Both ends of the auxiliary traction steel rope 15 are respectively connected to the auxiliary winches 13. A cable-releasing machine 3 is also provided on the side of the anchor hole 1 on the bank A of the suspension bridge away from the main cable winch 8. The main cable strand is wound on the cable-releasing machine 3, and main cable strand anchor heads 5 and main cable strand tail end anchor heads 7 are provided at both ends of the main cable strand.

[0025] During actual use, the main cable strand anchor head 5 of the present invention is connected to the auxiliary traction module, and the auxiliary traction module pulls the main cable strand anchor head 5 to the anchor hole 1 of the bank A, and then the main cable strand anchor head 5 is separated from the auxiliary traction module, and the main cable strand anchor head 5 is extended and pulled to the rear anchor surface 2 of the bank B by the main cable extra-long traction module, so that the main cable strand tail end anchor head 7 in the cable-laying machine 8 on the bank A is pulled out, and the auxiliary traction module is connected to the main cable strand tail end anchor head 7; the main cable extra-long traction module pulls the main cable strand anchor head 5 in the reverse direction to the front anchor surface of the bank B. At this time, the auxiliary traction module maintains contact with the main cable extra-long traction module. The traction module pulls the anchor head 7 at the tail end of the main cable strand at the same speed; when the anchor head 5 of the main cable strand reaches the front anchor surface of Bank B, the connection between the main cable extra-long traction module and the anchor head 5 of the main cable strand is released, and then the lifting equipment is used to connect the anchor head 5 of the main cable strand to the anchor point at the front anchor surface of Bank B; the auxiliary traction module continues to pull the anchor head 7 at the tail end of the main cable strand to the front anchor surface of Bank A; the connection between the auxiliary traction module of Bank A and the anchor head 7 at the tail end of the main cable strand is released, and then the lifting equipment is used to connect the anchor head 7 at the tail end of the main cable strand to the anchor point at the front anchor surface of Bank A to complete the installation of the main cable. This installation method is simple and practical, with strong operability, and can achieve full coverage of the installation of main cables for tunnel-type anchored suspension bridges on both sides of the river. Embodiment 2 Preferably, on the basis of Embodiment 1, in this embodiment, preferably, a main cable traction puller 10 is provided on the main cable traction steel rope 11 , and an auxiliary puller 14 is provided on the auxiliary traction steel rope 15 .

[0026] In actual use, the main cable traction steel rope 11 of the present invention is provided with a main cable traction puller 10, and the auxiliary traction steel rope 15 is provided with an auxiliary puller 14, which facilitates the pulling of the main cable traction steel rope 11 and the auxiliary traction steel rope 15.

[0027] Embodiment 3 Preferably, on the basis of Embodiment 1 or Embodiment 2, in this embodiment, preferably, a main cable traction steel rope roller 12 is provided at the turning point of the designed traction path of the main cable strand.

[0028] During actual use, a main cable traction steel rope idler 12 is provided at the turning point of the traction path of the main cable strands of the present invention, so as to facilitate the steering of the main cable traction steel rope 11, and the structure is simple and the applicability and operability are strong.

[0029] Embodiment 4 Preferably, based on Embodiment 1 or Embodiment 3, in this embodiment, preferably, the distance from the cable-laying machine 3 to the front anchor surface 4 of Bank A is smaller than the length of the remaining main cable strand in the cable-laying machine 3 when the main cable strand anchor head 5 is pulled to the front anchor surface 6 of Bank B.

[0030] During actual use, when the distance from the cable-laying machine 3 described in the present invention to the anchor surface 4 in front of bank A is less than the length of the remaining main cable strand in the cable-laying machine 3 when the anchor head of the main cable strand reaches the anchor surface in front of bank B, the main cable extra-long traction module and the auxiliary traction module need to cooperate. When the main cable extra-long traction module pulls the main cable strand anchor head 5 from the anchor hole 1 of bank A to the rear anchor surface 2 of bank B, and pulls the main cable strand tail end anchor head 7 out of the cable-laying machine 3, the auxiliary traction module is connected to the main cable strand tail end anchor head 7 through the auxiliary puller 14, and the main cable extra-long traction module reversely pulls the main cable strand anchor head 5 to the anchor point position of the front anchor surface 6 of bank B, and the auxiliary traction module pulls the main cable strand tail end anchor head 7 to the front anchor surface 4 of bank A at the same speed, and then releases the main cable puller 10 and the auxiliary puller 14, and recovers them to the anchor hole 1 of bank A and the cable-laying machine 3 respectively, so as to prepare for the traction of the anchor heads at both ends of the next main cable strand. The structure is simple, the use efficiency is high, the investment is small, and the operability is strong.

[0031] Embodiment 5 Preferably, on the basis of Embodiment 1 or Embodiment 4, in this embodiment, preferably, an auxiliary traction steel rope roller 16 is provided at a turning point of the traction path of the auxiliary traction steel rope 15 .

[0032] During actual use, the auxiliary traction steel rope 15 of the present invention is provided with an auxiliary traction steel rope roller 16 at the turning point of the traction path, which is convenient for the auxiliary traction steel rope 15 to turn, has a simple structure, and is highly applicable and operable.

[0033] Embodiment 6 A traction method for erecting the main cable of a cross-strait tunnel anchor suspension bridge, using the multi-stage ultra-long traction system for erecting the main cable of a cross-strait tunnel anchor suspension bridge as described above, comprises the following steps: S1: Arrange the main cable extra-long traction module and the auxiliary traction module. The traction range of the main cable extra-long traction module is from the anchor hole 1 of bank A to the rear anchor surface 2 of bank B, and the traction range of the auxiliary traction module is from the cable-laying machine 3 to the front anchor surface 4 of bank A. S2: the main cable strand anchor head 5 is connected to the auxiliary traction module, and then the auxiliary traction module pulls the main cable strand anchor head 5 to the anchor hole 1 of bank A, and then the main cable strand anchor head 5 is separated from the auxiliary traction module; S3: the main cable extra-long traction module connects the main cable strand anchor head 5 that has been detached in step S2, and then the main cable extra-long traction module tractions the main cable strand anchor head 5 to the anchor surface 6 in front of shore B; the main cable extra-long traction module continues to traction the main cable strand anchor head 5 until the main cable strand tail end anchor head 7 is pulled out from the cable-laying machine 3; S4: the auxiliary traction module connects the main cable strand tail end anchor head 7 that is detached from the cable-laying machine 3 in step S3, and then the main cable strand anchor head 5 is towed from the rear anchor surface 2 of bank B to the front anchor surface 6 of bank B by the main cable extra-long traction module. At the same time, the auxiliary traction module tows the main cable strand tail end anchor head 7 to the front anchor surface 4 of bank A at the same speed; when the main cable strand anchor head 5 arrives at the front anchor surface 6 of bank B, the main cable extra-long traction module is released, and then the released main cable strand anchor head 5 is connected to the anchor point at the front anchor surface 6 of bank B by using a hoisting device; S5: After the auxiliary traction module continues to pull the main cable strand tail end anchor head 7 to the front anchor surface 4 of bank A, the auxiliary traction module is released, and then the released main cable strand tail end anchor head 7 is connected to the anchor point at the front anchor surface 4 of bank A by using lifting equipment to complete the main cable installation.

[0034] In the steps S4 and S5, the hoisting equipment is installed at the front anchor chamber 18 of Bank A and the front anchor chamber 19 of Bank B respectively.

[0035] The hoisting device of the present invention is a pulley block. The pulley block is small in size, light in weight, simple in operation and convenient in use. The hoisting device is installed in the front anchor chamber 18 of bank A and the front anchor chamber 19 of bank B, so as to fix the main cable strand anchor head 5 and the main cable strand tail end anchor head 7.

[0036] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by any technician familiar with the technical field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A multi-stage ultra-long traction system suitable for the erection of main cables of a cross-strait tunnel anchor suspension bridge, characterized in that: The invention comprises an extra-long main cable traction module and an auxiliary traction module. The extra-long main cable traction module comprises two main cable winches (8), a steering wheel (9) and a main cable traction steel rope (11). The two main cable winches (8) are located on one side of an anchor hole (1) on the A bank of the suspension bridge. The steering wheel (9) is located on the rear anchor surface (2) on the B bank of the suspension bridge. One end of the main cable traction steel rope (11) is connected to one main cable winch (8), and the other end passes through a gantry (20) at the top of a main tower (21) of the tunnel anchor suspension bridge on both sides in sequence, bypasses the steering wheel (9), and then connects to another main cable winch. The auxiliary traction module comprises two auxiliary winches (13) and auxiliary traction steel ropes (15), the two auxiliary winches (13) are located on both sides of the anchor hole (1) of the suspension bridge A bank, and the two ends of the auxiliary traction steel ropes (15) are respectively connected to the auxiliary winches (13). A cable-laying machine (3) is also provided on the side of the anchor hole (1) of the suspension bridge A bank away from the main cable winches (8), and a main cable strand is wound around the cable-laying machine (3). Main cable strand anchor heads (5) and main cable strand tail end anchor heads (7) are provided at both ends of the main cable strand.

2. According to claim 1, a multi-stage super-long traction system suitable for erecting main cables of a cross-strait tunnel anchor suspension bridge is characterized in that: The main cable traction steel rope (11) is provided with a main cable traction puller (10), and the auxiliary traction steel rope (15) is provided with an auxiliary puller (14).

3. According to claim 1, a multi-stage ultra-long traction system suitable for erecting main cables of a cross-strait tunnel anchor suspension bridge is characterized in that: A main cable traction steel rope roller (12) is provided at the turning point of the designed traction path of the main cable strand.

4. According to claim 1, a multi-stage super-long traction system suitable for erecting main cables of a cross-strait tunnel anchor suspension bridge is characterized in that: The distance between the cable-laying machine (3) and the anchor surface (4) in front of bank A is less than the length of the remaining main cable strands in the cable-laying machine (3) when the main cable strand anchor head (5) is pulled to the anchor surface (6) in front of bank B.

5. According to claim 1, a multi-stage super-long traction system suitable for erecting main cables of a cross-strait tunnel anchor suspension bridge is characterized in that: An auxiliary traction steel rope roller (16) is provided at a bend in the traction path designed for the auxiliary traction steel rope (15).

6. A traction method for erecting the main cable of a cross-strait tunnel anchor suspension bridge, using a multi-stage super-long traction system for erecting the main cable of a cross-strait tunnel anchor suspension bridge as claimed in claims 1 to 5, characterized in that: The following steps are involved: S1: Arrange the main cable extra-long traction module and the auxiliary traction module. The traction range of the main cable extra-long traction module is from the anchor hole of bank A (1) to the rear anchor surface of bank B (2), and the traction range of the auxiliary traction module is from the cable-laying machine (3) to the front anchor surface of bank A (4); S2: The main cable strand anchor head (5) is connected to the auxiliary traction module, and then the auxiliary traction module tows the main cable strand anchor head (5) to the anchor hole (1) of bank A, and then the main cable strand anchor head (5) is separated from the auxiliary traction module; S3: the main cable extra-long traction module is connected to the main cable strand anchor head (5) that has been detached in step S2, and then the main cable extra-long traction module tractions the main cable strand anchor head (5) to the anchor surface (6) in front of shore B; the main cable extra-long traction module continues to traction the main cable strand anchor head (5) until the main cable strand tail end anchor head (7) is pulled out from the cable-laying machine (3); S4: the auxiliary traction module is connected to the main cable strand tail end anchor head (7) detached from the cable-laying machine (3) in step S3, and then the main cable extra-long traction module is used to pull the main cable strand anchor head (5) from the rear anchor surface (2) of bank B to the front anchor surface (6) of bank B. At the same time, the auxiliary traction module pulls the main cable strand tail end anchor head (7) to the front anchor surface (4) of bank A at the same speed; when the main cable strand anchor head (5) reaches the front anchor surface (6) of bank B, the main cable extra-long traction module is released, and then the released main cable strand anchor head (5) is connected to the anchor point at the front anchor surface (6) of bank B by using a lifting device; S5: After the auxiliary traction module continues to pull the main cable strand tail end anchor head (7) to the front anchor surface (4) of bank A, the auxiliary traction module is released, and then the released main cable strand tail end anchor head (7) is connected to the anchor point at the front anchor surface (4) of bank A using a lifting device, thereby completing the main cable installation.

7. A multi-stage super-long traction system suitable for erecting main cables of a cross-strait tunnel anchor suspension bridge according to claim 6, characterized in that: In the steps S4 and S5, the lifting equipment is installed at the front anchor room (18) of bank A and the front anchor room (19) of bank B respectively.

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