Front fulcrum structure of cable-stayed bridge

Abstract

The utility model discloses a cable-stayed bridge front fulcrum structure which comprises a connecting plate fixedly assembled with a cable connector, sliding sleeve seats symmetrically arranged are movably sleeved on the connecting plate, clamping plates are hinged to the end portions of the sliding sleeve seats, and deflection outer end faces of the two clamping plates are fixedly installed on a pull rope sliding in the connecting plate. Rubber pads abutting against the ends of the cross beams are fixedly installed on the inner end faces of the clamping plates. According to the front fulcrum structure of the cable-stayed bridge, the symmetrically-arranged clamping plates are used for adapting to the cambered surface of the end of the cross beam, so that the contact face between the connecting mechanism and the end of the cross beam is increased, the maximum contact face of the rubber pads is guaranteed, the attaching connecting process is firmer, meanwhile, the stress states of the two rubber pads are the same, and the service life of the cable-stayed bridge is prolonged. The deformation degree is uniformly diffused, so that the loss of the rubber pad caused by extrusion force is reduced, the use stability and safety of the connecting mechanism are improved, and the service life of the rubber pad in actual work is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to bridge construction equipment technical field, concretely related to a cable -stayed bridge front fulcrum structure. BACKGROUND

[0002] The cantilever beam of the cable -stayed bridge is usually constructed by using the front fulcrum hanging basket, and the crossbeam at the end of the hanging basket is usually fixed with the stay cable by using the connecting mechanism to ensure the installation of the stay cable in batches during the movement of the hanging basket.

[0003] According to the publication (announcement) number: CN220450696U, the publication (announcement) day is: February 6, 2024, a front fulcrum hanging basket walking structure for cast-in-place construction of cable-stayed bridge is disclosed.

[0004] In the prior art including the above patent, in order to facilitate the assembly of the stay cable, the end of the crossbeam generally has a certain arc, so the connecting mechanism for fixing the stay cable is usually equipped with a rubber pad in contact with the arc surface, but the contact area between the rubber pad and the arc surface is insufficient during the stress process, and the rubber pad needs to be extruded to the deformation state of completely adhering to the arc surface, which causes serious wear of the rubber pad and affects the safety and service life of the connecting mechanism. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a cable -stayed bridge front fulcrum structure to solve the above problems.

[0006] In order to achieve the above purpose, the utility model provides the following technical scheme:

[0007] A cable -stayed bridge front fulcrum structure, comprising a crossbeam provided with a stay cable connector, further comprising a connecting plate fixedly assembled with the stay cable connector, a sliding sleeve seat symmetrically arranged is movably sleeved on the connecting plate, and a clamping plate is hingedly arranged at the end of the sliding sleeve seat.

[0008] Two clamping plates are fixedly installed on the pull rope sliding in the connecting plate, and the inner end surface of the clamping plate is fixedly installed with a rubber pad abutting against the end of the crossbeam.

[0009] Preferably, the end surface of the rubber pad is provided with inclined holes arranged at equal intervals.

[0010] Preferably, an inner hole abutting against the inner end surface of the clamping plate is arranged between adjacent inclined holes.

[0011] Preferably, a horizontal rope is arranged on the pull rope, and a horizontal hole is arranged on the connecting plate, which is symmetrically arranged and used for accommodating the horizontal movement of the horizontal rope.

[0012] Preferably, a sleeve head sleeved on the end of the connecting plate is fixedly installed on the sliding sleeve seat.

[0013] Preferably, the end face of the connecting plate movably has a driving rod matched with the cross beam.

[0014] Preferably, the driving rod is fixedly provided with a driving head matched with the sleeve head.

[0015] Preferably, the driving rod is further fixedly provided with a stopper, and the stopper is fixedly provided with a tension spring between the stopper and the horizontal hole.

[0016] Preferably, the driving rod is provided with a through hole for the horizontal rope to pass through.

[0017] Preferably, the tension rope is a steel wire rope.

[0018] In the above technical solution, the cable-stayed bridge front fulcrum structure provided by the utility model has the following beneficial effects: the force borne by the stay cable is transmitted to the clamping plates through the connecting plate and the sliding sleeve seat, the symmetrically arranged clamping plates are adapted to the arc surface of the end portion of the cross beam, the contact surface between the connecting mechanism and the end portion of the cross beam is increased, the maximum contact surface of the rubber pad is ensured, the fitting connection process is more fastened, the stress state of the two rubber pads is the same, the deformation degree is evenly diffused, the loss of the rubber pad caused by the extrusion force is reduced, the use stability and safety of the connecting mechanism are improved, and the service life of the rubber pad in actual work is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained by those skilled in the art according to these drawings.

[0020] Figure 1 The connecting mechanism and the cable connector, the cross beam end assembly schematic diagram provided by the utility model embodiment;

[0021] Figure 2 The connecting mechanism and the cable connector assembly schematic diagram provided by the utility model embodiment;

[0022] Figure 3 The connecting mechanism part position front view schematic diagram provided by the utility model embodiment;

[0023] Figure 4 The connecting mechanism explosion schematic diagram provided by the utility model embodiment.

[0024] EXPLANATION OF REFERENCE NUMERALS:

[0025] 1, beam; 2, cable connector; 3, connecting plate; 31, transverse hole; 32, notch; 4, sliding sleeve seat; 41, sleeve head; 5, clamping plate; 51, rubber pad; 511, inclined hole; 512, inner hole; 52, connecting strip; 53, pull rope; 531, horizontal rope; 6, drive rod; 61, drive head; 62, perforation. DETAILED DESCRIPTION

[0026] In order to make the technical personnel in the art better understand the technical scheme of the utility model, the utility model will be further described in detail below with reference to the drawings.

[0027] As Figures 1-4 shown, a cable-stayed bridge front fulcrum structure, comprising a beam 1 provided with a cable connector 2, further comprising a connecting plate 3 fixedly assembled with the cable connector 2, the connecting plate 3 movably sleeving a symmetrically arranged sliding sleeve seat 4, the sliding sleeve seat 4 end is hingedly provided with a clamping plate 5;

[0028] Two clamping plates 5 are fixedly installed on the pull rope 53 sliding in the connecting plate 3, and the inner end surface of the clamping plate 5 is fixedly installed with a rubber pad 51 abutting against the end of the beam 1.

[0029] Specifically, the cable connector 2 is connected with the cable-stayed cable, and a nut is installed thereon (the connection and fixing mode of the nut is prior art, which is not described here) to be clamped with the connecting plate 3, and a hole is formed in the end surface of the connecting plate 3 for the cable connector 2 to pass through, and the force received by the cable-stayed cable is transmitted to the clamping plate 5 to be fixed with the beam 1.

[0030] Further, the hinged position of the clamping plate 5 is provided with a torsional spring, and the torsional spring and its installation mode are prior art, which is not described here, and the purpose is that the torsional spring remains deformed during the clamping plate 5 is fixed with the beam 1, so that the rubber pad 51 on the clamping plate 5 can be firmly attached to the arc surface on the beam 1.

[0031] Further, when the clamping plate 5 is adapted to the arc surface and is deflected, one end surface on which the rubber pad 51 is installed is the inner end surface of the clamping plate 5, and the reverse is the outer end surface, and the outer end surface is fixedly installed with a connecting strip 52 for fixedly installing the pull rope 53, for ensuring that the pull rope 53 has enough bending stress space, and the connecting strip 52 in the default state can also shield and prevent the pull rope 53 from being pressed.

[0032] The force received by the stay cable is transmitted to the clamping plates 5 through the connecting plate 3 and the sliding sleeve base 4, so that the symmetrically arranged clamping plates 5 adapt to the arc surface at the end of the cross beam 1, the contact area between the connecting mechanism and the end of the cross beam 1 is increased, the maximum contact area of the rubber pad 51 is ensured, the fitting connection process is more firm, the stress state of the two rubber pads 51 is the same, the deformation degree is uniformly diffused, the damage of the rubber pad 51 caused by the extrusion force is reduced, the use stability and safety of the connecting mechanism are improved, and the service life of the rubber pad 51 in actual work is ensured.

[0033] As a further provided embodiment of the utility model, the rubber pad 51 is provided with equidistantly arranged inclined holes 511 on the end face.

[0034] Specifically, the plurality of inclined holes 511 make the end face of the rubber pad 51 present a sawtooth shape.

[0035] The sawtooth-shaped end face increases the anti-skid effect of the rubber pad 51 and the arc surface, and the end face of the rubber pad 51 after being extruded can make the inclined holes 511 close to each other, so as to make the rubber have additional friction, and further strengthen the anti-skid effect.

[0036] As another further provided embodiment of the utility model, an inner hole 512 is arranged between the adjacent inclined holes 511 and abuts against the inner end face of the clamping plate 5.

[0037] Specifically, the inner hole 512 and the adjacent two inclined holes 511 present an inverted triangular shape.

[0038] The plurality of inner holes 512 improve the deformation capacity of the rubber pad 51, make the rubber contact position more, and when the end face of the rubber pad 51 is seriously worn, the rubber protrusions between the adjacent inner holes 512 can keep the close fitting function, and the anti-skid effect of the residual rubber pad 51 is also ensured.

[0039] As another further provided embodiment of the utility model, a horizontal rope 531 is arranged on the pull rope 53, and a horizontal hole 31 for accommodating the movement of the horizontal rope 531 is symmetrically arranged on the connecting plate 3.

[0040] Specifically, the horizontal rope 531 is a section of the pull rope 53, and the diameter of the horizontal hole 31 is greater than the diameter of the pull rope 53.

[0041] The two horizontal holes 31 provide movement space for the two pull ropes 53, and when a single pull rope 53 connects two clamping plates 5, the symmetrically arranged clamping plates 5 can keep synchronous during deflection, the contact effect of the rubber pad 51 is maximized, the wear of the two rubber pads 51 caused by uneven stress is avoided, and the problem of reducing the fitting effect is further caused.

[0042] As a further provided embodiment of the utility model, a sleeve head 41 sleeved on the end of the connecting plate 3 is fixedly installed on the sliding sleeve base 4.

[0043] Specifically, the sleeve head 41 slides on the connecting plate 3, and a pull spring is fixedly installed between the sleeve seat 4 and the end of the connecting plate 3, so that the sleeve seat 4 can move relative to the connecting plate 3.

[0044] The sleeve head 41 protects the sleeve seat 4 and the connecting plate 3, limits the sliding connection, ensures the stability of the sleeve seat 4 during movement, and avoids the problem of slipping of the sleeve seat 4.

[0045] As a further embodiment of the utility model, a driving rod 6 that abuts against the cross beam 1 is movably arranged on the end surface of the connecting plate 3.

[0046] Specifically, the driving rod 6 is a cylindrical metal rod.

[0047] The multiple driving rods 6 contact the arc surface at the end of the cross beam 1, so that the driving rods 6 under stress provide a multi-point compression effect on the arc surface, further enhancing the connection stability between the connecting mechanism and the cross beam 1.

[0048] As a further embodiment of the utility model, a driving head 61 that abuts against the sleeve head 41 is fixedly installed on the driving rod 6.

[0049] Specifically, the driving head 61 has an inverted trapezoidal cross section, and two driving heads 61 are fixedly sleeved on the driving rod 6, so that the upper and lower ends of the sleeve head 41 can be simultaneously subjected to abutting force, avoiding the problem of uneven stress on the sleeve seat 4 and the inability to move, and the end surface of the connecting plate 3 is also provided with a notch 32 for the movement of one of the driving heads 61.

[0050] The driving head 61 at the end of the driving rod 6 is subjected to the extrusion force of the arc surface, and the force is transmitted to the sleeve head 41 through the inclined surface of the driving head 61, prompting the two sleeve seats 4 to move away from each other, thereby opening the clamping plate 5 to fit the arc surface, and ensuring the butt joint effect of the connecting mechanism and the end of the cross beam 1.

[0051] As a further embodiment of the utility model, a stop block is also fixedly installed on the driving rod 6, and a pull spring is fixedly installed between the stop block and the horizontal hole 31.

[0052] Specifically, the pull spring is arranged in a ring shape on the outer side of the driving rod 6, so as to ensure the resetting of the driving rod 6.

[0053] The cooperation of the stop block and the pull spring makes it easier for the driving head 61 to move the sleeve seat 4, and the pull spring with the resetting function also enables the driving head 61 to closely adhere to the arc surface, further improving the anti-slip effect of the connecting mechanism.

[0054] As a further embodiment of the utility model, a through hole 62 is provided on the driving rod 6 for the horizontal rope 531 to pass through.

[0055] Specifically, the inner side wall of the perforation 62 is rounded to avoid causing serious abrasion to the horizontal rope 531.

[0056] The two clamps 5 are in deflection under stress, so the straightened horizontal rope 531 applies pressure to the driving rod 6 through the perforation 62, so that the driving head 61 can be firmly attached to the arc surface under the combined action of the tension spring reset ability and the pressure, thereby ensuring the connection effect.

[0057] In a further embodiment of the utility model, the pull rope 53 is specifically a steel wire rope.

[0058] The steel wire rope ensures the stability of the mutual transmission of the clamps 5 and makes the pull rope 53 have a longer service life and higher safety.

[0059] Working principle: the force received by the cable is transmitted to the clamps 5 through the connecting plate 3 and the sliding sleeve seat 4, so that the symmetrically arranged clamps 5 adapt to the arc surface of the end of the cross beam 1, thereby increasing the contact surface between the connecting mechanism and the end of the cross beam 1, making the connection process more secure, and also making the two rubber pads 51 have the same stress state and the deformation degree is evenly distributed, so that the loss of the rubber pads 51 caused by the extrusion force is reduced.

[0060] The above only describes some exemplary embodiments of the utility model in a descriptive manner, and it is needless to say that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the utility model. Therefore, the above drawings and description are illustrative in nature and should not be understood as limiting the scope of protection of the utility model claims.

Claims

1. A structure of a front support point of a cable-stayed bridge, comprising a cross beam (1) provided with a stay connecting head (2), characterized in that, Also include the connecting plate (3) fixedly assembled with the cable connector (2), the connecting plate (3) is movably sleeved with symmetrically arranged sliding sleeve seat (4), the sliding sleeve seat (4) is hingedly provided with clamping plate (5) at the end; Two said clamping plate (5) deflection outer end face fixedly installed in the connecting plate (3) in the pull rope (53), the inner end face of the clamping plate (5) is fixedly installed with rubber pad (51) abutting to the end of the cross beam (1).

2. The structure of the front support point of a cable-stayed bridge according to claim 1, characterized in that, The end face of the rubber pad (51) is provided with equidistantly arranged inclined holes (511).

3. The structure of the front support point of a cable-stayed bridge according to claim 2, characterized in that, The inner hole (512) is provided between the adjacent inclined holes (511) and abuts the inner end face of the clamping plate (5).

4. The structure of the front support point of a cable-stayed bridge according to claim 2, characterized in that, The pull rope (53) is provided with a horizontal rope (531), and the connecting plate (3) is provided with symmetrically arranged horizontal holes (31) for accommodating the horizontal movement of the horizontal rope (531).

5. The structure of the front support point of a cable-stayed bridge according to claim 4, characterized in that, The sliding sleeve seat (4) is fixedly installed with a sleeve head (41) sleeved on the end of the connecting plate (3).

6. The structure of the front support point of a cable-stayed bridge according to claim 5, characterized in that, The end face of the connecting plate (3) is movably provided with a driving rod (6) abutting to the cross beam (1).

7. The structure of the front support point of a cable-stayed bridge according to claim 6, characterized in that, The driving rod (6) is fixedly installed with a driving head (61) abutting to the sleeve head (41).

8. The structure of the front support point of a cable-stayed bridge according to claim 6, characterized in that, The driving rod (6) is also fixedly installed with a stop block, and the stop block and the horizontal hole (31) are fixedly installed with a tension spring.

9. The structure of the front support point of a cable-stayed bridge according to claim 6, characterized in that, The driving rod (6) is provided with a through hole (62) for the horizontal rope (531) to pass through.

10. The structure of the front support point of a cable-stayed bridge according to claim 6, characterized in that, The pull rope (53) is a steel wire rope.

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