A cable-free tower double-cable suspension system and construction method

Abstract

The present application relates to a tower-less double-cable crane system and construction method, including: a main cable crane system, which includes a main cable across the canyon, and main cable anchors located at both ends of the main cable and anchoring the main cable to the mountains on both sides of the canyon, and a main cable overhead traveling vehicle that moves along the length of the main cable; an auxiliary cable crane system, which is located above the main cable crane system, including an auxiliary cable across the canyon, and auxiliary cable anchors located at both ends of the auxiliary cable and anchoring the auxiliary cable to the mountains on both sides of the canyon, and an auxiliary cable overhead traveling vehicle that moves along the length of the auxiliary cable. The present application sets an auxiliary cable crane system above the main cable crane system to lift part of the structure of the main cable crane system. The lifting weight and lifting range of the auxiliary cable crane system can meet the construction requirements of the main cable crane system, can replace the construction of complex access roads, and has high economic efficiency.

Description

Technical Field

[0001] The present application relates to the technical field of bridge construction, and in particular to a towerless double-cable crane system and a construction method. Background Art

[0002] At present, cable crane systems are often used in the construction of large-span arch bridges in mountainous areas. Cable crane systems are composed of main cables, traction cables, lifting cables, saddles, lifting overhead cranes, cable supports, winches, electrical systems, cable towers, wind cables, and anchor systems.

[0003] The cable crane system itself is a lifting system, in which the cable crane system's saddle, winch, anchor system and other structures have a large deadweight. The installation of the cable crane relies on transportation facilities such as flatbed trucks and cranes. However, in mountainous areas with steep terrain and poor geological conditions, temporary construction roads are difficult to cover the cable crane's range for economic or environmental reasons.

[0004] Therefore, in mountainous areas with steep terrain and complex geological conditions, adopting reasonable methods to transport, lift and install the heavier parts of the cable crane system is a technical problem to be solved in the field of mountain arch bridge construction technology. Summary of the Invention

[0005] The embodiments of the present application provide a towerless dual-cable crane system and a construction method to solve the problem in related technologies that cable crane systems are difficult to transport and construct in mountainous areas with steep terrain and poor geological conditions.

[0006] A first aspect of an embodiment of the present application provides a towerless dual-cable crane system, comprising:

[0007] A main cable hoist system, comprising a main cable spanning the canyon, and main cable anchors at both ends of the main cable anchoring the main cable to the mountains on both sides of the canyon, and a main cable overhead crane mounted on the main cable that moves along the length of the main cable;

[0008] A secondary cable crane system is located above the main cable crane system. The secondary cable crane system includes a secondary cable spanning over the canyon, and secondary cable anchors at both ends of the secondary cable for anchoring the secondary cable to the mountains on both sides of the canyon. A secondary cable overhead crane is mounted on the secondary cable and moves along the length of the secondary cable.

[0009] In some embodiments, the main cable crane system further includes a main traction cable for pulling the main cable overhead traveling vehicle along the length direction of the main cable.

[0010] In some embodiments, the auxiliary cable hoist system further comprises an auxiliary traction cable for pulling the auxiliary cable overhead travelling vehicle to move along the length direction of the auxiliary cable.

[0011] In some embodiments: the main cable crane system also includes a main lifting rope, one end of which is connected to the main cable trolley to lift the hoist of the main cable trolley, and one end of the main lifting rope is wrapped around a main winch, which is fixed on the mountains on both sides of the canyon.

[0012] In some embodiments: there are two groups of main cable overhead travelling vehicles, each of which is provided with a main lifting rope for lifting the main cable overhead travelling vehicle hoist; there are two groups of main winches, each of which reels in the main lifting rope, and the main lifting rope is hung on the main cable through a main support rope.

[0013] In some embodiments: the auxiliary cable crane system also includes an auxiliary lifting cable, one end of which is connected to the auxiliary cable trolley to lift the hoist of the auxiliary cable trolley, and one end of the auxiliary lifting cable is wound around the auxiliary winch, which is fixed on the mountains on both sides of the canyon.

[0014] In some embodiments: there are two groups of auxiliary cable trolleys, and the two groups of auxiliary cable trolleys are respectively provided with auxiliary lifting ropes for lifting the auxiliary cable trolley hoist. There are two groups of auxiliary winches, and the two groups of auxiliary winches respectively reel in the auxiliary lifting ropes, and the auxiliary lifting ropes are hung on the auxiliary cable through the auxiliary support rope device.

[0015] In some embodiments, the span of the auxiliary cable is greater than the span of the main cable, and the projections of the auxiliary cable and the main cable in the height direction overlap with each other.

[0016] In some embodiments: the main cable anchor and the auxiliary cable anchor are both prestressed rock anchors, and the main cable crane system and the auxiliary cable crane system are not provided with a tower supporting the main cable and the auxiliary cable.

[0017] A second aspect of the embodiments of the present application provides a construction method for a towerless dual-cable crane system, the method using the dual-cable crane system described in any of the above embodiments, the method comprising the following steps:

[0018] Design the auxiliary cable crane system. Determine the rated lifting weight of the auxiliary cable crane system based on the maximum deadweight component of the main cable crane system. Determine the main span of the auxiliary cable crane system based on the full operating range of the main cable crane system. The main span of the auxiliary cable crane system should be greater than that of the main cable crane system.

[0019] The auxiliary cable crane system is used to anchor the auxiliary cable on the mountains on both sides of the canyon. The auxiliary cable is carried by aircraft or rockets, spanned over the canyon, and anchored to the mountains on both sides of the canyon through auxiliary cable anchors. Then, an auxiliary cable overhead crane is installed on the auxiliary cable to move along the length of the auxiliary cable.

[0020] Construct the main cable crane system, using the auxiliary cable crane system to hoist the main cable anchor, main cable and main cable overhead crane respectively, anchor the main cable anchor to the mountains on both sides of the canyon, span the main cable above the canyon and anchor it to the mountains on both sides of the canyon through the main cable anchor, and then set up the main cable overhead crane on the main cable to move along the length of the main cable;

[0021] During the construction of the arch bridge structure, the auxiliary cable crane system is used in conjunction with the main cable crane system to lift and hoist the main structure of the arch bridge.

[0022] The beneficial effects of the technical solution provided by this application include:

[0023] An embodiment of the present application provides a tower-less dual-cable hoist system and a construction method. Since the tower-less dual-cable hoist system of the present application is provided with a main cable crane system, the main cable crane system includes a main cable spanning over the canyon, and main cable anchors located at both ends of the main cable and anchoring the main cable to the mountains on both sides of the canyon, and a main cable overhead car moving along the length direction of the main cable is mounted on the main cable; an auxiliary cable crane system, the auxiliary cable crane system is located above the main cable crane system, the auxiliary cable crane system includes an auxiliary cable spanning over the canyon, and auxiliary cable anchors located at both ends of the auxiliary cable and anchoring the auxiliary cable to the mountains on both sides of the canyon, and an auxiliary cable overhead car moving along the length direction of the auxiliary cable is mounted on the auxiliary cable.

[0024] Therefore, the tower-less dual-cable crane system of the present application is suitable for mountainous areas with steep terrain and poor geological conditions, and for the construction of arch bridges with large spans and temporary construction access roads that are difficult to cover the operating range of the cable crane. A secondary cable crane system is set above the main cable crane system to lift part of the structure of the main cable crane system. The secondary cable crane system has a simple and lightweight structure. The lifting capacity and lifting range of the secondary cable crane system can meet the transportation and installation of the main cable crane system. It can replace the construction of complex construction access roads and has high economic efficiency.

[0025] In addition, after the transportation and installation of the main cable crane system, the auxiliary cable crane system can also cooperate with the main cable crane system to lift and hoist the main structure of the arch bridge. Compared with the single-seat cable crane system, the lifting efficiency is improved. In addition, the dual-cable crane system of this application does not require the construction of a tower. The main cable crane system and the auxiliary cable crane system are directly anchored to the mountains on both sides of the canyon, which has the advantages of simple structure and easy construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0027] Figure 1 This is a schematic structural diagram of an embodiment of the present application.

[0028] Reference numerals:

[0029] 10. Auxiliary cable hoist system; 11. Auxiliary cable anchor; 12. Auxiliary cable; 13. Auxiliary cable overhead crane; 14. Auxiliary traction rope; 15. Auxiliary lifting rope; 16. Auxiliary support rope; 17. Auxiliary winch;

[0030] 20. Main cable hoist system; 21. Main cable anchor; 22. Main cable; 23. Main cable overhead crane; 24. Main traction cable; 25. Main hoisting cable; 26. Main support cable; 27. Main winch. DETAILED DESCRIPTION

[0031] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0032] The embodiments of the present application provide a tower-less dual-cable crane system and a construction method, which can solve the problem in related technologies that cable crane systems are difficult to transport and construct in mountainous areas with steep terrain and poor geological conditions.

[0033] See also Figure 1 As shown, the first aspect of the embodiment of the present application provides a towerless dual-cable crane system, comprising:

[0034] The main cable hoist system 20 includes a main cable 22 spanning the canyon, and main cable anchors 21 at each end of the main cable 22, anchoring the main cable 22 to the mountains on either side of the canyon. A main cable overhead crane 23 is mounted on the main cable 22 and moves along the length of the main cable 22. The main cable anchors 21 are prestressed rock anchors anchored to the mountains on either side of the canyon.

[0035] A secondary cable hoist system 10 is located above the main cable hoist system 20. It includes a secondary cable 12 that spans the canyon, and secondary cable anchors 11 at each end of the secondary cable 12, which anchor the secondary cable 12 to the mountains on either side of the canyon. A secondary cable overhead crane 13 is mounted on the secondary cable 12 and moves along its length. The secondary cable anchors 11 are prestressed rock anchors anchored to the mountains on either side of the canyon. Neither the main cable hoist system 20 nor the secondary cable hoist system 10 is equipped with a tower to support the main cable 22 and the secondary cable 12.

[0036] The towerless dual-cable crane system of the present embodiment is suitable for use in mountainous areas with steep terrain and poor geological conditions, and for the construction of large-span arch bridges where temporary construction access roads are difficult to cover with the cable crane's reach. A secondary cable crane system 10 is provided above the main cable crane system 20 to lift portions of the main cable crane system 20. The secondary cable crane system 10 is simple and lightweight, and its lifting capacity and lifting range both meet the requirements of the main cable crane system 20. It can replace the complex construction access roads and is highly economical.

[0037] Furthermore, after the transportation and installation of the main cable crane system 20 is completed, the auxiliary cable crane system 10 can also cooperate with the main cable crane system 20 to perform lifting and hoisting operations on the main structure of the arch bridge. Compared with a single-seat cable crane system, the dual-cable crane system of the present application improves lifting efficiency. In addition, the main cable crane system 20 and the auxiliary cable crane system 10 are directly anchored to the mountains on both sides of the canyon, which has the advantages of a simple structure and easy construction.

[0038] In some alternative embodiments: See Figure 1 As shown, an embodiment of the present application provides a towerless dual-cable hoist system. The main cable hoist system 20 of the dual-cable hoist system further includes a main traction cable 24 that pulls a main cable trolley 23 along the length of the main cable 22. The main traction cable 24 pulls the main cable trolley 23 to move back and forth along the length of the main cable 22. The auxiliary cable hoist system 10 further includes an auxiliary traction cable 14 that pulls an auxiliary cable trolley 13 along the length of the auxiliary cable 12. The auxiliary traction cable 14 pulls the auxiliary cable trolley 13 to move back and forth along the length of the auxiliary cable 12. The span of the auxiliary cable 12 is greater than the span of the main cable 22, and the projections of the auxiliary cable 12 and the main cable 22 in the height direction overlap.

[0039] In some alternative embodiments: See Figure 1As shown, an embodiment of the present application provides a towerless dual-cable hoist system, wherein the main cable hoist system 20 of the towerless dual-cable hoist system further includes a main lifting cable 25, one end of the main lifting cable 25 is connected to the main cable trolley 23, the main lifting cable 25 is used to lift the hoisting device of the main cable trolley 23, one end of the main lifting cable 25 is wound around the main winch 27, and the main winch 27 is fixed on the mountains on both sides of the canyon.

[0040] There are two groups of main cable cranes 23, and the two groups of main cable cranes 23 are respectively equipped with main lifting ropes 25 for lifting the hoisting equipment of the main cable crane 23. There are two groups of main winches 27, and the two groups of main winches 27 respectively reel in the main lifting ropes 25 of the two groups of main cable cranes 23. The main lifting ropes 25 are suspended on the main cable 22 through the main support rope device 26.

[0041] In some alternative embodiments: See Figure 1 As shown, an embodiment of the present application provides a towerless double-cable hoist system, wherein the auxiliary cable hoist system 10 of the towerless double-cable hoist system further includes an auxiliary lifting cable 15, one end of the auxiliary lifting cable 15 is connected to the auxiliary cable trolley 13, the auxiliary lifting cable 15 is used to lift the hoisting device of the auxiliary cable trolley 13, one end of the auxiliary lifting cable 15 is wound around the auxiliary winch 17, and the auxiliary winch 17 is fixed on the mountains on both sides of the canyon.

[0042] There are two groups of auxiliary cable trolleys 13, each of which is equipped with an auxiliary lifting rope 15 for lifting the auxiliary cable trolley 13 hoist. There are two groups of auxiliary winches 17, each of which reels in the auxiliary lifting rope 15. The auxiliary lifting rope 15 is hung on the auxiliary cable 12 through the auxiliary support rope 16.

[0043] See also Figure 1 As shown, a second aspect of the embodiment of the present application provides a construction method for a towerless dual-cable crane system, the method using the towerless dual-cable crane system described in any of the above embodiments, the method comprising the following steps:

[0044] Step 1. Design the secondary cable crane system 10. Determine the rated lifting weight of the secondary cable crane system 10 based on the maximum deadweight component of the main cable crane system 20. Determine the main span of the secondary cable crane system 10 based on the full operating range of the main cable crane system 20. The main span of the secondary cable crane system 10 is greater than the main span of the main cable crane system 20.

[0045] Step 2: Construct the auxiliary cable crane system 10, anchor the auxiliary cable anchors 11 on the mountains on both sides of the canyon, use an airplane or rocket to carry the auxiliary cable 12, span the auxiliary cable 12 above the canyon and anchor it to the mountains on both sides of the canyon through the auxiliary cable anchors 11, and then set up an auxiliary cable overhead crane 13 on the auxiliary cable 12 to move along the length direction of the auxiliary cable 12.

[0046] Step 3: Construct the main cable crane system 20. Use the auxiliary cable crane system 10 to lift the main cable anchor 21, the main cable 22 and the main cable overhead crane 23 respectively, anchor the main cable anchor 21 on the mountains on both sides of the canyon, span the main cable 22 above the canyon and anchor it on the mountains on both sides of the canyon through the main cable anchor 21, and then set up the main cable overhead crane 23 on the main cable 22 to move along the length direction of the main cable 22.

[0047] Step 4: construct the arch bridge structure by using the auxiliary cable crane system 10 to cooperate with the main cable crane system 20 to lift and hoist the main structure of the arch bridge.

[0048] How it works

[0049] The embodiment of the present application provides a tower-less dual-cable crane system and a construction method. Since the dual-cable crane system of the present application is provided with a main cable crane system 20, the main cable crane system 20 includes a main cable 22 spanning over the canyon, and main cable anchors 21 located at both ends of the main cable 22 and anchoring the main cable 22 to the mountains on both sides of the canyon, and a main cable trolley 23 moving along the length direction of the main cable 22 is set on the main cable 22; an auxiliary cable crane system 10, the auxiliary cable crane system 10 is located above the main cable crane system 20, the auxiliary cable crane system 10 includes an auxiliary cable 12 spanning over the canyon, and auxiliary cable anchors 11 located at both ends of the auxiliary cable 12 and anchoring the auxiliary cable 12 to the mountains on both sides of the canyon, and an auxiliary cable trolley 13 moving along the length direction of the auxiliary cable 12 is set on the auxiliary cable 12.

[0050] Therefore, the tower-less double-cable crane system of the present application is suitable for mountainous areas with steep terrain and poor geological conditions, and for the construction of arch bridges with large spans and temporary construction access roads that are difficult to cover the range of the cable crane. A secondary cable crane system 10 is set above the main cable crane system 20. The secondary cable crane system 10 is used to lift part of the structure of the main cable crane system 20, so as to facilitate the transportation and installation of the main cable crane system 20 in mountainous areas with steep terrain and poor geological conditions. The secondary cable crane system 10 has a simple and lightweight structure. The lifting capacity and lifting range of the secondary cable crane system 10 can meet the construction of the main cable crane system 20. It can replace the construction of complex construction access roads and has high economic efficiency.

[0051] Furthermore, after the transportation and installation of the main cable crane system 20 is completed, the auxiliary cable crane system 10 can also cooperate with the main cable crane system 20 to perform lifting and hoisting operations on the main structure of the arch bridge. Compared with a single-seat cable crane system, the dual-cable crane system of the present application improves lifting efficiency. In addition, the main cable crane system 20 and the auxiliary cable crane system 10 are directly anchored to the mountains on both sides of the canyon, which has the advantages of a simple structure and easy construction.

[0052] In the description of this application, it should be noted that the terms "upper" and "lower" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0053] It should be noted that, in this application, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element.

[0054] The foregoing is merely a list of specific embodiments of the present application, intended to enable those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the broadest scope consistent with the principles and novel features of the present application.

Claims

1. A construction method for a towerless double-cable crane system, characterized in that: The towerless double-cable crane system includes: A main cable hoist system (20), the main cable hoist system (20) comprising a main cable (22) spanning over a canyon, and main cable anchors (21) located at both ends of the main cable (22) and anchoring the main cable (22) to the mountains on both sides of the canyon, and a main cable overhead crane (23) mounted on the main cable (22) and moving along the length direction of the main cable (22); A secondary cable hoist system (10), the secondary cable hoist system (10) is located above the main cable hoist system (20), the secondary cable hoist system (10) includes a secondary cable (12) spanning over the canyon, and secondary cable anchors (11) located at both ends of the secondary cable (12) for anchoring the secondary cable (12) to the mountains on both sides of the canyon, and a secondary cable overhead crane (13) is mounted on the secondary cable (12) and moves along the length direction of the secondary cable (12); The method comprises the following steps: Designing a secondary cable crane system (10), determining a rated lifting weight of the secondary cable crane system (10) based on a maximum deadweight component of the main cable crane system (20), determining a main span of the secondary cable crane system (10) based on a full operating range of the main cable crane system (20), wherein the main span of the secondary cable crane system (10) is greater than the main span of the main cable crane system (20); A construction auxiliary cable crane system (10) is constructed, auxiliary cable anchors (11) are anchored on the mountains on both sides of the canyon, an auxiliary cable (12) is carried by an aircraft, the auxiliary cable (12) is spanned over the canyon and anchored on the mountains on both sides of the canyon through the auxiliary cable anchors (11), and then an auxiliary cable overhead crane (13) is installed on the auxiliary cable (12) and moves along the length direction of the auxiliary cable (12); Constructing a main cable crane system (20), using the auxiliary cable crane system (10) to hoist the main cable anchor (21), the main cable (22) and the main cable overhead traveling vehicle (23), anchoring the main cable anchor (21) on the mountains on both sides of the canyon, spanning the main cable (22) over the canyon and anchoring it on the mountains on both sides of the canyon through the main cable anchor (21), and then setting up the main cable overhead traveling vehicle (23) on the main cable (22) to move along the length direction of the main cable (22); During the construction of the arch bridge structure, the auxiliary cable crane system (10) is used in conjunction with the main cable crane system (20) to lift and hoist the main structure of the arch bridge.

2. The construction method of a towerless dual-cable crane system according to claim 1, characterized in that: The main cable hoist system (20) further comprises a main traction cable (24) for traction of the main cable overhead travelling vehicle (23) to move along the length direction of the main cable (22).

3. The construction method of a towerless dual-cable crane system according to claim 1, characterized in that: The auxiliary cable hoist system (10) further comprises an auxiliary traction rope (14) for traction of the auxiliary cable overhead travelling vehicle (13) to move along the length direction of the auxiliary cable (12).

4. The construction method of a towerless dual-cable crane system according to claim 1, characterized in that: The main cable crane system (20) further includes a main hoisting cable (25), one end of which is connected to the main cable trolley (23) to lift the sling of the main cable trolley (23), and one end of which is wound around a main hoist (27), which is fixed to the mountains on both sides of the canyon.

5. The construction method of a towerless dual-cable crane system according to claim 4, characterized in that: The main cable trolley (23) is provided with two groups, and the two groups of the main cable trolleys (23) are respectively provided with a main lifting rope (25) for lifting the main cable trolley (23) hoist. The main hoist (27) is provided with two groups, and the two groups of the main hoist (27) are respectively wound up with the main lifting rope (25). The main lifting rope (25) is hung on the main cable (22) through the main support rope device (26).

6. The construction method of a towerless dual-cable crane system according to claim 1, characterized in that: The auxiliary cable crane system (10) further includes an auxiliary hoisting cable (15), one end of which is connected to the auxiliary cable trolley (13) to lift the sling of the auxiliary cable trolley (13), and one end of which is wound around an auxiliary winch (17), which is fixed to the mountains on both sides of the canyon.

7. The construction method of a towerless dual-cable crane system according to claim 6, characterized in that: The auxiliary cable trolley (13) is provided with two groups, and the two groups of auxiliary cable trolleys (13) are respectively provided with auxiliary lifting ropes (15) for lifting the auxiliary cable trolley (13) hoisting equipment. The auxiliary winches (17) are provided with two groups, and the two groups of auxiliary winches (17) are respectively used to reel in the auxiliary lifting ropes (15). The auxiliary lifting ropes (15) are hung on the auxiliary cable (12) through the auxiliary support rope device (16).

8. The construction method of a towerless dual-cable crane system according to claim 1, characterized in that: The span of the auxiliary cable (12) is greater than the span of the main cable (22), and the projections of the auxiliary cable (12) and the main cable (22) in the height direction overlap with each other.

9. The construction method of a towerless dual-cable crane system according to claim 1, characterized in that: The main cable anchor (21) and the auxiliary cable anchor (11) are both prestressed rock anchors, and the main cable crane system (20) and the auxiliary cable crane system (10) are not provided with towers supporting the main cable (22) and the auxiliary cable (12).

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