Independent inhaul cable type guy cable hanging basket

Abstract

An independent inhaul cable type guy cable hanging basket comprises a rhombic hanging basket body, an independent inhaul cable, an operation platform and a tensioning platform, the rhombic hanging basket body is detachably installed on a main beam of a 0 # block of a cable-stayed bridge, the operation platform and the tensioning platform are installed at the front end of the rhombic hanging basket body, the rear end of the independent inhaul cable is anchored to a main tower, and the front end of the independent inhaul cable is connected with the front end of the rhombic hanging basket body. And tensioning and releasing of the independent inhaul cables are operated through the tensioning platform. The stress system of the hanging basket is changed, a cantilever structure is changed into a simple support structure, and the bearing capacity of the hanging basket is greatly improved by changing the stress system; the included angle between the independent inhaul cable and the bridge floor is increased, the vertical component force of the independent inhaul cable is utilized more effectively, the utilization efficiency of the independent inhaul cable is improved, and the requirement for the specification of the independent inhaul cable is lowered; and the horizontal component force of the independent guy cable which is not beneficial to the stability of the guy cable hanging basket is reduced, and the requirement of a thrust device is lowered.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge engineering, in particular to an independent cable-stayed cable-carrying hanging basket. Background Art

[0002] The construction of the main girder of a concrete cable-stayed bridge usually has the cast-in-place method with supports and the cantilever casting method. The cast-in-place method with supports is restricted by many conditions such as the terrain and hydrology under the bridge; the cantilever casting method is not restricted by the conditions under the bridge and has no impact on the traffic under the bridge, and it is the most commonly used method for the construction of the main girder of a concrete cable-stayed bridge. With the development of larger bridge spans and wider bridge decks, higher requirements are also put forward for the equipment used in the cantilever casting method. It has developed from the traditional rear fulcrum hanging basket to the cable-carrying hanging basket and the composite cable-carrying hanging basket that are more suitable for cable-stayed bridges. Both the cable-carrying hanging basket and the composite cable-carrying hanging basket utilize the stay cables of the cable-stayed bridge to provide the front fulcrum. Their disadvantage is that the vertical component force utilization efficiency is low due to the limited stay cable angle, and the horizontal component force that is not conducive to the stability of the hanging basket is very large, especially not suitable for cable-stayed bridges with low towers and cable-stayed bridges with harp-shaped stay cables; at the same time, the stay cables need to be adjusted and the system needs to be converted multiple times, and the operation is complex. Summary of the Invention

[0003] In order to solve the above problems, the utility model provides an independent cable-stayed cable-carrying hanging basket.

[0004] The technical solution adopted by the utility model:

[0005] An independent cable-stayed cable-carrying hanging basket, comprising a diamond-shaped hanging basket, independent cables, an operation platform and a tensioning platform. The diamond-shaped hanging basket is detachably installed on the main girder of the 0-block of the cable-stayed bridge. An operation platform and a tensioning platform are installed at the front end of the diamond-shaped hanging basket. The rear end of the independent cable is anchored on the main tower, and the front end of the independent cable is connected to the front end of the diamond-shaped hanging basket. The tensioning and releasing of the independent cable are operated through the tensioning platform.

[0006] Tracks are laid on the top surface of the main girder of the cable-stayed bridge, cushion beams are laid below the tracks, and pressure beams are arranged horizontally above the tracks. The pressure beams are connected to the cast main girder segments through threaded steel bars and nuts.

[0007] A reaction support is provided at the end of the track. The reaction support is a bracket structure welded by steel plates and is connected to the cast main girder segment through embedded bolts.

[0008] The diamond-shaped hanging basket includes an upper chord, a middle column, a lower chord, a front strut and a rear tie rod. The lower chord corresponds to the track, and a reverse pulley is provided at the rear of the lower chord. The reverse pulley supports on the flange of the track on both sides of the web of the track.

[0009] A rear anchor is provided at the rear of the diamond-shaped hanging basket. The rear anchor is located above the lower chord and is made of section steel and welded by steel plates. The rear anchor is fixed on the cast main girder segment through threaded steel bars. A support bearing is provided at the lower part of the front end of the diamond-shaped hanging basket, and the support bearing is welded by steel plates.

[0010] Before the front end of the diamond-shaped hanging basket is installed, front suspension rods are installed. Through the front suspension rods, an inner sliding beam, a front lower cross beam, and a rear lower cross beam are connected below the diamond-shaped hanging basket. A bottom longitudinal beam is erected between the front lower cross beam and the rear lower cross beam.

[0011] The independent stay cables are full-length steel strands. The front ends of the independent stay cables are connected to the front end anchorage of the front end of the diamond-shaped hanging basket, and the rear ends of the independent stay cables are temporarily anchored to the upper part of the main tower.

[0012] Advantages of the present utility model: The independent stay cables of the present utility model provide a front fulcrum for the diamond-shaped hanging basket. The independent stay cables utilize the cable-stayed bridge tower for support and anchorage, with good economy; the force system of the hanging basket is changed, from a cantilever structure to a simply supported structure. By changing the force system, the load-bearing capacity of the hanging basket is greatly increased; the angle between the independent stay cables and the bridge deck is increased, and the vertical component force of the independent stay cables is more effectively utilized, improving the utilization efficiency of the independent stay cables and reducing the specification requirements for the independent stay cables; the horizontal component force of the independent stay cables that is not conducive to the stability of the cable-stayed hanging basket is reduced, and the requirements for the thrust device are lowered. Description of the Drawings

[0013] Figure 1 It is a construction schematic diagram of the present utility model.

[0014] Figure 2 It is a structural schematic diagram of the present utility model.

[0015] Figure 3 It is a structural schematic diagram of the diamond-shaped hanging basket of the present utility model.

[0016] Wherein: 1 - Cable-stayed bridge foundation; 2 - Cable-stayed bridge 0# block; 3 - Main tower; 4 - Front end anchorage; 5 - Independent stay cable; 6 - Diamond-shaped hanging basket; 7 - Main beam; 8 - Operation platform; 9 - Tensioning platform; 10 - Rear anchor; 11 - Front suspension rod; 12 - Inner sliding beam; 13 - Main beam segment to be poured; 14 - Bottom longitudinal beam; 15 - Front lower cross beam; 16 - Rear lower cross beam; 17 - Main beam segment that has been poured. Detailed Embodiment

[0017] A cable-stayed hanging basket with independent stay cables includes a diamond-shaped hanging basket 6, independent stay cables 5, an operation platform 8, and a tensioning platform 9. The diamond-shaped hanging basket 6 is detachably installed on the main beam 7 of the cable-stayed bridge 0# block 2. An operation platform 8 and a tensioning platform 9 are installed at the front end of the diamond-shaped hanging basket 6. The rear end of the independent stay cable 5 is anchored on the main tower 3, and the front end of the independent stay cable 5 is connected to the front end of the diamond-shaped hanging basket 6. The tensioning and releasing of the independent stay cable 5 are operated through the tensioning platform 9.

[0018] Tracks are laid on the top surface of the main beam 7 of the cable-stayed bridge. The tracks are I-shaped steel. Pad beams are laid below the tracks, and compression beams are arranged horizontally above the tracks. The compression beams are connected to the main beam segment 17 that has been poured through threaded steel bars and nuts.

[0019] The end of the track is provided with a reaction support. The reaction support is a bracket structure welded by steel plates and is connected to the already cast main girder segment 17 through embedded bolts.

[0020] The diamond-shaped hanging basket 6 includes an upper chord 61, a middle column 62, a lower chord 63, a front compression bar 64 and a rear tension bar 65. The lower chord 63 corresponds to the track. A reverse buckle wheel is provided at the rear of the lower chord 63, and the reverse buckle wheel is supported on the track flange on both sides of the track web.

[0021] A rear anchor 10 is provided at the rear of the diamond-shaped hanging basket 6. The rear anchor 10 is located above the lower chord 63. The rear anchor 10 is made of profiled steel and welded by steel plates. The rear anchor 10 is fixed to the already cast main girder segment 17 through threaded steel bars. A support bearing is provided at the lower part of the front end of the diamond-shaped hanging basket 6, and the support bearing is welded by steel plates.

[0022] The front suspension rod 11 is installed at the front end of the diamond-shaped hanging basket 6. The inner sliding beam 12, the front lower cross beam 15 and the rear lower cross beam 16 are connected below the diamond-shaped hanging basket 6 through the front suspension rod 11. A bottom longitudinal beam 14 is erected between the front lower cross beam 15 and the rear lower cross beam 16. The inner sliding beam 12, the front lower cross beam 15, the rear lower cross beam 16 and the bottom longitudinal beam 14 are all made of profiled steel and welded together, and are used to bear the concrete load of the cast main girder.

[0023] The independent cable 5 is a full-length steel strand. The front end of the independent cable 5 is connected to the front anchorage 4 at the front end of the diamond-shaped hanging basket 6, and the rear end of the independent cable 5 is temporarily anchored to the upper part of the main tower 3.

[0024] An independent cable type cable-stayed hanging basket, the implementation steps during application:

[0025] Step 1: Construct the foundation 1 of the cable-stayed bridge, the main tower 3 and the 0-block 2 of the cable-stayed bridge. Assemble the diamond-shaped hanging basket 6 on the 0-block 2 of the cable-stayed bridge. Use a hoisting machine to hoist the diamond-shaped hanging basket 6 to the installation position, and install the rear anchor 10 to fix the diamond-shaped hanging basket 6 on the 0-block 2 of the cable-stayed bridge; install the front suspension rod 11, and use the front suspension rod 11 to connect the inner sliding beam 12, the front lower cross beam 15 and the rear lower cross beam 16 to the diamond-shaped hanging basket 6. Both ends of the bottom longitudinal beam 14 are erected on the front lower cross beam 15 and the rear lower cross beam 16; install an operation platform 8 and a tensioning platform 9 at the front end of the diamond-shaped hanging basket 6.

[0026] Step 2: Install the independent cable 5, anchor the independent cable 5 at the tower end, connect the front end of the independent cable 5 to the front anchorage 4 of the diamond-shaped hanging basket front end, and perform the first tensioning.

[0027] Step 3: Pour the concrete of the main girder 7. When the concrete volume of the segment reaches 50%, perform the second tensioning of the independent cable 5.

[0028] Step 4: Continue to pour the concrete of the main girder segment 13 to be poured until all the concrete is poured.

[0029] Step 5: Install the independent cables 5 for the corresponding segments. After the concrete meets the requirements for strength and elastic modulus, tension and anchor the independent cables 5. The weight of the main girder 7 is borne by the independent cables 5 to complete the system conversion.

[0030] Step 6: Release and temporarily remove the independent cables 5, and lower the diamond hanging basket 6.

[0031] Step 7: Move the diamond hanging basket 6 forward to its position, and repeat Steps 2 to 6 to construct the concrete pouring of the main girder for the next segment.

[0032] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present invention.

[0033] In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0034] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "couple", "fix", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, an electrical connection, or communicable with each other; it can be directly connected, or indirectly connected through an intermediate medium, and can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] The above has described the embodiments of the present invention in detail, but the content described is only the preferred embodiments of the present invention and cannot be considered as limiting the scope of implementation of the present invention. Any equivalent changes and improvements made according to the scope of the present invention application should still fall within the scope covered by the patent of the present invention.

Claims

1. An independent cable-type guy rope hanging basket, characterized in that: The invention comprises a diamond hanging basket (6), an independent cable (5), an operating platform (8) and a tensioning platform (9); the diamond hanging basket (6) is detachably mounted on the main beam (7) of the No. 0 block (2) of the cable-stayed bridge; the operating platform (8) and the tensioning platform (9) are mounted on the front end of the diamond hanging basket (6); the rear end of the independent cable (5) is anchored on the main tower (3); the front end of the independent cable (5) is connected to the front end of the diamond hanging basket (6); and the tensioning and releasing of the independent cable (5) is operated through the tensioning platform (9).

2. The independent cable-type guy rope hanging basket according to claim 1, characterized in that: A track is laid on the top surface of the main beam (7) of the cable-stayed bridge, a cushion beam is laid under the track, and a pressure beam is arranged transversely above the track. The pressure beam is connected to the cast main beam segment (17) through threaded steel bars and nuts.

3. The independent cable-type guy rope hanging basket according to claim 1, characterized in that: The diamond hanging basket (6) comprises an upper chord (61), a middle column (62), a lower chord (63), a front pressure rod (64) and a rear pull rod (65), wherein the lower chord (63) corresponds to the track, and a reverse hook wheel is arranged at the rear of the lower chord (63), and the reverse hook wheel is supported on the track flange at both sides of the track web.

4. The independent cable-type guy rope hanging basket according to claim 1, characterized in that: A rear anchor (10) is provided at the rear of the diamond-shaped hanging basket (6), and the rear anchor (10) is located above the lower chord (63). The rear anchor (10) is made of profiled steel and then welded from steel plates. The rear anchor (10) is fixed to the cast main beam segment (17) through threaded steel. A support bracket is provided at the lower front end of the diamond-shaped hanging basket (6), and the support bracket is welded from steel plates.

5. The independent cable-type guy rope hanging basket according to claim 1, characterized in that: A front suspension rod (11) is installed at the front end of the diamond-shaped hanging basket (6), and an inner sliding beam (12), a front lower cross beam (15) and a rear lower cross beam (16) are connected below the diamond-shaped hanging basket (6) through the front suspension rod (11), and a bottom longitudinal beam (14) is set between the front lower cross beam (15) and the rear lower cross beam (16).

6. The independent cable-type guy rope hanging basket according to claim 1, characterized in that: The independent cable (5) is a continuous steel strand, the front end of the independent cable (5) is connected to the front end anchor (4) of the front end of the diamond hanging basket (6), and the rear end of the independent cable (5) is temporarily anchored on the upper part of the main tower (3).

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