Cover plate type cableway bridge abutment

Abstract

The present invention relates to a cover-type cableway bridge abutment, belonging to the field of bridge engineering. The present invention comprises a foundation material, a saddle for laying the main cable is arranged on the top of the foundation material, a transfer beam is arranged on one side of the foundation material, the length direction of the transfer beam is consistent with the width direction of the cableway bridge, a set spacing is provided between the transfer beam and the foundation material, and between the two, the foundation material is located on the side closer to the length direction center of the cableway bridge; the transfer beam is fixed by an anchor cable, a fixed pulley is arranged on the side of the transfer beam facing the foundation material, in the vertical plane, the position of the fixed pulley is lower than the position of the saddle, the end of the main cable is connected to the fixed pulley on the transfer beam after passing through the saddle, and the fixed pulley corresponds to the main cable one by one; a simply supported plate is laid between the top of the transfer beam and the top of the saddle. The present invention adopts a simply supported plate structure, which can reduce excavation, reduce damage to the environment, make the force of the anchor cable more clear, and facilitate routine inspection and adjustment of the anchor cable.

Description

Technical Field

[0001] The invention relates to a cover plate type cableway bridge abutment and belongs to the field of bridge engineering. Background Art

[0002] Modern cableway bridges are a type of temporary bridge structure widely used in large-scale engineering construction. The vehicle load of the cableway bridge is transmitted to the load-bearing main cable through the bridge deck. The main cable transmits the force to the anchors anchored on both sides. The anchors mainly bear tension. Commonly used anchor forms include ridges, anchor piles, anchor rods and mixed anchors. Abutments (foundation materials) are set between the anchors and the main cables, and pulleys are set on the abutments to realize the steering of the main cables and bear the vertical force.

[0003] Cableway bridges require abutments to achieve vertical support, the turning of the main cable, and the connection between the bridge deck and the two banks. Sufficient space should be left between the main cable and the anchor for the connection and adjustment of the anchor cable and the main cable. The commonly used method at present is to dig an anchor pit between the abutment and the anchor cable, and then backfill the pit with gravel soil after the anchor cable and the connector between the anchor cable and the main cable are set.

[0004] In the prior art, since both the main cable and the anchor cable need to be connected with the connector by overlapping, there are many anchor cables, which need to be arranged vertically in multiple rows, resulting in a large amount of excavation and serious ecological damage; because the backfill depth of the anchor pit is too large, the density is difficult to ensure, which easily causes the roadbed above the anchor pit to sink; after the main cable crosses the abutment saddle, a large downward tilt angle is required to meet the cable layout space requirements, which leads to an increase in the excavation depth and an increase in the bending stress of the main cable at the saddle; due to the force and torsion of the wire rope, the connectors between the main cable and the anchor cable often collide with each other; there are many conventional anchor cables, which are difficult to arrange in the anchor pit; the backfilled gravel soil will cause damage to the anchor cable; the friction between the anchor cable and the gravel soil is not easy to be quantified, so its influence on the verticality of the main cable is not easy to estimate; the vehicle load borne by the anchor cable in the anchor pit after being wrapped by the gravel soil cannot be accurately considered; it is difficult to conduct routine inspections on the anchor cables in the anchor pit after the cableway bridge is put into operation; at the same time, the cableway bridge has a large span; the conversion anchor plate is set, which increases the number of turns of the anchor cable and increases the local stress of the anchor cable. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a cover plate type cableway bridge abutment, which can reduce excavation, alleviate damage to the environment, make the force of the anchor cable more clear, and facilitate routine inspection and adjustment of the anchor cable.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is: a cover-type cableway bridge abutment, including a foundation material, a saddle for laying the main cable is arranged on the top of the foundation material, a transfer beam is arranged on one side of the foundation material, the length direction of the transfer beam is consistent with the width direction of the cableway bridge, there is a set spacing between the transfer beam and the foundation material, and between the two, the foundation material is located on the side closer to the length center of the cableway bridge; the transfer beam is fixed by an anchor cable, and a fixed pulley is arranged on the side of the transfer beam facing the foundation material, in the vertical plane, the position of the fixed pulley is lower than the position of the saddle, and the end of the main cable is connected to the fixed pulley on the conversion beam after passing through the saddle, and the fixed pulley corresponds to the main cable one by one; a simply supported plate is laid between the top of the conversion beam and the top of the saddle.

[0007] Furthermore, a simply supported plate support matching the simply supported plate is arranged on the top of the transfer beam.

[0008] Furthermore, the pulley support of the fixed pulley is fixedly connected to the conversion beam through a screw rod.

[0009] Furthermore, the centers of the fixed pulleys are located on the same straight line, and the straight line is parallel to the saddle distribution line on the top of the foundation material.

[0010] Furthermore, the cable saddle comprises a pulley support plate and a pulley, the height of the pulley support plate is consistent with the top surface height of the main cable after passing through the pulley; the simply supported plate is located at one end of the base material and is laid on the pulley support plate and the top of the main cable.

[0011] Furthermore, it also includes a stabilizing rope, a rope saddle for laying the stabilizing rope is arranged on the top of the base material, and fixed pulleys corresponding to the stabilizing ropes are arranged on the conversion beam. After the end of the stabilizing rope is wound around the rope saddle, it is connected to the fixed pulley on the conversion beam.

[0012] Furthermore, the anchor cable is a pressure-bearing anchor cable.

[0013] The specific process steps of the present invention applied to the cableway bridge are:

[0014] (1) Cast the foundation material and install the saddle components (the height of the pulley bracket plate should be consistent with the top surface height of the main cable after passing through the pulley);

[0015] (2) Construct pressure-bearing anchor cables and transfer beams, set screws on the transfer beams, and set simply supported plate supports above the transfer beams;

[0016] (3) Tension bearing anchor cable;

[0017] (4) Install a fixed pulley on the screw rod of the conversion beam;

[0018] (5) Main cable installation, where the main cable is connected to the fixed pulley on the transfer beam;

[0019] (6) Installation of bridge deck structure;

[0020] (7) Use I-beams and other materials to weld simply supported plates;

[0021] (8) Laying of simply supported slabs.

[0022] The beneficial effects of the present invention are as follows: the abutment of the cableway bridge is designed as a simply supported plate structure, the main cables crossing the saddle are tilted downward in batches and connected to the anchor cables, and adjusted so that all the main cables are tilted downward at the same small angle after passing through the saddle to be connected to the transfer beam, the transfer beam is fixed in the anchor pit by the pressure-bearing anchor cable, and then the transfer beam is connected to the main cable by the fixed pulley, thereby reducing the connection length between the anchor cable and the connector, shortening the straight length of the anchor pit behind the abutment, reducing excavation, and reducing damage to the environment, each main cable is connected to the transfer beam at the same small angle, reducing the excavation depth of the anchor pit, each main cable has the same boundary conditions, making the force on the main cable clearer, the bearing capacity of the pressure-bearing anchor cable is greater than that of the wire rope anchor cable, reducing the difficulty of anchor cable arrangement, and thus facilitating routine inspection and adjustment of the anchor cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is an elevation view of the present invention;

[0024] Figure 2 is a plan view of the present invention;

[0025] Figure 3 This is the installation elevation of the saddle;

[0026] Figure 4 yes Figure 3 A partial enlarged view of the middle saddle;

[0027] Figure 5 It is the installation plan of the saddle.

[0028] Markings in the figure: 1-simply supported plate support, 2-foundation material, 3-main cable, 4-saddle, 5-conversion beam, 6-anchor cable, 7-simply supported plate, 8-pulley bracket plate, 9-pulley, 10-fixed pulley, 11-screw, 12-locking clamp, 13-railing. DETAILED DESCRIPTION

[0029] The present invention will be further described below in conjunction with the accompanying drawings.

[0030] like Figure 1 to Figure 5As shown, the present invention includes a base material 2, a saddle 4 for laying a main cable 3 is arranged on the top of the base material 2, a conversion beam 5 is arranged on one side of the base material 2, the length direction of the conversion beam 5 is consistent with the width direction of the cableway bridge, there is a set spacing between the conversion beam 5 and the base material 2, and between the two, the base material 2 is located on the side closer to the length center of the cableway bridge; the conversion beam 5 is fixed by an anchor cable 6, and a fixed pulley 10 is arranged on the side of the conversion beam 5 facing the base material 2, in the vertical plane, the position of the fixed pulley 10 is lower than the position of the saddle 4, and the end of the main cable 3 is connected to the fixed pulley 10 on the conversion beam 5 after passing through the saddle 4, and the fixed pulley 10 corresponds to the main cable 3 one by one; a simply supported plate 7 is laid between the top of the conversion beam 5 and the top of the saddle 4.

[0031] In order to facilitate installation and maintain structural stability, a simply supported plate support 1 that matches the simply supported plate 7 is provided on the top of the transfer beam 5; the pulley support of the fixed pulley 10 is fixedly connected to the transfer beam 5 through a screw 11. The simply supported plate 7 can be made of I-beam and other materials welded together. The cable saddle 4 includes a pulley support plate 8 and a pulley 9. In order to make the simply supported plate 7 work more reliably, the height of the pulley support plate 8 of the cable saddle 4 is consistent with the top surface height of the main cable 3 after passing through the pulley; the simply supported plate 7 is located at one end of the base material 2 and is laid on the pulley support plate 8 and the top of the main cable 3. The connection between the fixed pulley 10 and the main cable 3 can be fixed by a conventional locking clamp. After the end of the main cable 3 passes around the fixed pulley 10, it can be locked and fixed by a locking clamp 12.

[0032] The centers of the fixed pulleys 10 are located on the same straight line, and the straight line is parallel to the cable saddle distribution line on the top of the foundation material 2. In this way, the main cable can be connected to the transfer beam at the same small angle downward after passing through the cable saddle, further reducing the amount of excavation.

[0033] A cableway bridge is generally also provided with a stabilizing cable. Accordingly, a saddle 4 for laying the stabilizing cable is provided on the top of the base material 2, and a fixed pulley 10 corresponding to the stabilizing cable is provided on the conversion beam 5. After the end of the stabilizing cable passes through the saddle 4, it is connected to the fixed pulley 10 on the conversion beam 5.

[0034] The anchor cable 6 in the present invention is preferably a pressure-bearing anchor cable, which has a bearing capacity greater than that of a wire rope anchor cable, can reduce the difficulty of arranging the anchor cable 6, and is convenient for routine inspection and adjustment of the anchor cable 6.

Claims

1. A cover-type cableway bridge abutment, comprising a base material (2), a cable saddle (4) for laying a main cable (3) being arranged on the top of the base material (2), characterized in that: A conversion beam (5) is arranged on one side of the base material (2), the length direction of the conversion beam (5) is consistent with the width direction of the cable bridge, a set spacing is provided between the conversion beam (5) and the base material (2), and between the two, the base material (2) is located on the side closer to the length direction center of the cable bridge; the conversion beam (5) is fixedly arranged by an anchor cable (6), the anchor cable (6) is a pressure-bearing anchor cable, and a fixed pulley (10) is arranged on the side of the conversion beam (5) facing the base material (2), and in a vertical plane, the fixed pulley (10) is arranged on the side of the conversion beam (5) facing the base material (2). The position of the fixed pulley (10) is lower than that of the saddle (4), the centers of the fixed pulleys (10) are located on the same straight line, and the straight line is parallel to the saddle distribution line at the top of the base material (2), and the ends of all the main cables (3) are tilted downward at the same angle after passing through the saddle (4) and connected to the fixed pulleys (10) on the conversion beam (5), and the fixed pulleys (10) correspond to the main cables (3) one by one; a simply supported plate (7) is laid between the top of the conversion beam (5) and the top of the saddle (4).

2. The cover-type cableway bridge abutment according to claim 1, characterized in that: A simply supported plate support (1) adapted to the simply supported plate (7) is arranged on the top of the conversion beam (5).

3. The cover-type cableway bridge abutment according to claim 1, characterized in that: The pulley support of the fixed pulley (10) is fixedly connected to the conversion beam (5) via a screw rod (11).

4. The cover-type cableway bridge abutment according to claim 1, characterized in that: The cable saddle (4) comprises a pulley support plate (8) and a pulley (9), wherein the height of the pulley support plate (8) is consistent with the height of the top surface of the main cable (3) after passing through the pulley; the simply supported plate (7) is located at one end of the base material (2) and is laid on the pulley support plate (8) and the top of the main cable (3).

5. The cover-type cableway bridge abutment according to any one of claims 1 to 4, characterized in that: It also includes a stabilizing cable. A cable saddle (4) for laying the stabilizing cable is arranged on the top of the base material (2). Fixed pulleys (10) corresponding to the stabilizing cables are arranged on the conversion beam (5). After the end of the stabilizing cable is wound around the cable saddle (4), it is connected to the fixed pulley (10) on the conversion beam (5).

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