Bridge short tower cable-stayed structure

Abstract

The utility model discloses a bridge short tower cable-stayed structure which comprises a tensioning nut, a stay cable jack, a tensioning rod, a connecting sleeve, a supporting foot, a beam end embedded pipe and a cable body, a buffering supporting seat is further arranged between a box beam and the supporting foot, one face of the buffering supporting seat abuts against the box beam, the other face of the buffering supporting seat abuts against the supporting foot, and the buffering supporting seat is made of elastic materials. The supporting foot comprises a cylindrical supporting foot protection shell and an annular supporting foot end plate, and the supporting foot end plate is fixed to the opening end of the supporting foot protection shell. The buffering supporting seat and the supporting foot end plate are arranged on the beam end embedded pipe in a sleeving manner, and the inner diameter of the buffering supporting seat and the inner diameter of the supporting foot end plate are consistent with the outer diameter of the beam end embedded pipe; an annular embedded pipe pressing plate is fixedly arranged after the end of the beam end embedded pipe extends into the supporting foot, the embedded pipe pressing plate abuts against the surface, away from the buffering supporting base, of the supporting foot end plate, and the outer diameter of the embedded pipe pressing plate is consistent with the inner diameter of the supporting foot protection shell.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of classification number especially relates to a bridge low tower cable-stayed structure. BACKGROUND

[0002] The cable-stayed bridge is also called the inclined bridge, is a kind of bridge that main beam is directly pulled on bridge tower by many cables, is a structural system that tower is pressure bearing, cable is tension and beam body is bending bearing, it can be regarded as the cable instead of the elastic support continuous beam of multi-span pier, it can reduce bending moment in beam body, reduce building height, reduce structural weight and save material.The cable-stayed bridge is mainly composed of cable tower, main beam and cable generally.The anchoring tension system of beam end of the existing cable in the overall tension process includes tension nut, cable jack, tension rod, support leg and connecting sleeve.Due to the influence of external factors such as rainfall and wind vibration in the operation process of cable, the cable structure damage and corrosion are easily caused.And since the support leg directly abuts on the bearing surface of each box girder of main beam, the support leg is easy to crush the box girder in the cable stretching process.The box girder is large in volume and needs to be prefabricated, and the construction cost is greatly increased by improving the strength of the box girder.Therefore, a solution is needed to avoid the damage of cable by external factors and the crushing of box girder by support leg at a smaller cost. SUMMARY

[0003] The utility model provides a kind of bridge low tower cable-stayed structure to solve above-mentioned technical problem.

[0004] To achieve the above object, the technical scheme of the utility model is as follows:

[0005] A kind of bridge low tower cable-stayed structure, including: tension nut, cable jack, tension rod, connecting sleeve, support leg, beam end embedded pipe and cable body, buffer support seat is further provided between box girder and support leg, one side of buffer support seat abuts on box girder, the other side abuts on support leg, buffer support seat uses elastic material;Support leg includes the support leg protective shell of cylindrical and the support leg end plate of annular, support leg end plate is fixed at the open end of support leg protective shell;Buffer support seat and support leg end plate are set on beam end embedded pipe, the outer diameter of buffer support seat and support leg end plate is consistent with the outer diameter of beam end embedded pipe;The end of beam end embedded pipe is inserted into support leg and is fixed with the annular embedded pipe pressing plate, embedded pipe pressing plate abuts on the surface of support leg end plate away from buffer support seat, the outer diameter of embedded pipe pressing plate is consistent with the inner diameter of support leg protective shell.

[0006] Preferably, buffer support seat uses high-damping rubber material.

[0007] Preferably, buffer support seat is circular truncated cone, the upper base surface diameter of buffer support seat is consistent with the outer diameter of support leg end plate, and the lower base surface diameter of buffer support seat is matched with the acting surface of box girder.

[0008] Preferably, the waterproof cover is sleeved on the cable body waterproof cover away from the beam end embedded pipe end, and the waterproof cover is sleeved on the cable body waterproof cover.

[0009] Preferably, one end of the waterproof cover is fixedly connected with the shockproof pull rope, and the other end of the shockproof pull rope is fixed on the box girder.

[0010] Preferably, the waterproof cover is sleeved on the cable body waterproof cover away from the beam end embedded pipe end, and the waterproof cover is sleeved on the cable body waterproof cover.

[0011] Preferably, the waterproof cover is sleeved on the cable body waterproof cover away from the beam end embedded pipe end, and the waterproof cover is sleeved on the cable body waterproof cover.

[0012] Preferably, the waterproof cover is sleeved on the cable body waterproof cover away from the beam end embedded pipe end, and the waterproof cover is sleeved on the cable body waterproof cover.

[0013] Preferably, the waterproof cover is sleeved on the cable body waterproof cover away from the beam end embedded pipe end, and the waterproof cover is sleeved on the cable body waterproof cover.

[0014] Beneficial effects:

[0015] The bridge low-pylon cable-stayed structure disclosed by the application fixes the position of the cable-stayed cable by arranging the shockproof pull rope and the water seepage prevention device on the waterproof cover of the cable-stayed cable, effectively reduces the damage of wind vibration to the cable-stayed cable, plays a role in water isolation, and prolongs the service life of the equipment. The force borne by the support leg and the pre-buried pipe at the beam end is transmitted to the box girder through the buffer supporting seat arranged between the support leg and the box girder, so that the box girder is prevented from being crushed, and the buffer supporting seat has the advantages of low cost due to small volume and easy manufacturing. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0017] Figure 1 The structure diagram of the bridge low-pylon cable-stayed structure disclosed by the present application is shown in the figure.

[0018] Figure 2 The structure diagram of the bridge low-pylon cable-stayed structure disclosed by the present application is shown in the figure. Figure 1 The local enlarged view of the cable-stayed cable tensioning device in the figure.

[0019] Figure 3 The structure diagram of the water seepage prevention device of the bridge low-pylon cable-stayed structure disclosed by the present application is shown in the figure.

[0020] Figure 4 The top view of the water seepage prevention device of the bridge low-pylon cable-stayed structure disclosed by the present application is shown in the figure.

[0021] 1、box girder;

[0022] 41、tensioning nut;42、cable-stayed cable jack;43、tensioning rod;44、connecting sleeve;45、support leg;451、support leg protection shell;452、support leg end plate;46、beam end pre-buried pipe;461、pre-buried pipe pressing plate;47、cable body;48、buffer supporting seat;49、cable body waterproof cover;410、waterproof cover;

[0023] 51、first through hole;52、second through hole;53、first mounting block;54、second mounting block;55、third mounting block;561、first bolt;562、second bolt;563、third bolt;564、fourth bolt;57、allowance slot;

[0024] 8、shockproof pull rope. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model below. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the protection scope of the utility model.

[0026] A bridge low tower cable-stayed structure, in combination with Figure 1 、 Figure 2 、 Figure 3 and Figure 4 , comprising: a tensioning nut 41, a cable-stayed cable jack 42, a tensioning rod 43, a connecting sleeve 44, a support leg 45, a beam end embedded pipe 46 and a cable body 47, a buffer support seat 48 is further arranged between the box girder 1 and the support leg 45, one side of the buffer support seat 48 abuts against the box girder 1, and the other side abuts against the support leg 45, and the buffer support seat 48 is made of an elastic material; the support leg 45 comprises a cylindrical support leg protective shell 451 and an annular support leg end plate 452, and the support leg end plate 452 is fixed at the opening end of the support leg protective shell 451; the buffer support seat 48 and the support leg end plate 452 are sleeved on the beam end embedded pipe 46, and the inner diameters of the buffer support seat 48 and the support leg end plate 452 are consistent with the outer diameter of the beam end embedded pipe 46; an annular embedded pipe pressing plate 461 is fixed at the end of the beam end embedded pipe 46 and extends into the support leg 45, the embedded pipe pressing plate 461 abuts against the surface of the support leg end plate 452 away from the buffer support seat 48, and the outer diameter of the embedded pipe pressing plate 461 is consistent with the inner diameter of the support leg protective shell 451. The embedded pipe pressing plate 461 presses the support leg end plate 452, the support leg end plate 452 presses the buffer support seat 48, and the buffer support seat 48 abuts against the box girder 1, so that the force borne by the support leg 45 and the beam end embedded pipe 46 is transmitted to the box girder 1 through the buffer support seat 48, and the buffer action of the buffer support seat 48 avoids the support leg 45 directly contacting the box girder 1 to damage the box girder 1. Moreover, the consistent inner diameters of the buffer support seat 48 and the support leg end plate 452 with the outer diameter of the beam end embedded pipe 46 and the consistent outer diameter of the embedded pipe pressing plate 461 with the inner diameter of the support leg protective shell 451 are all conducive to the positioning of the buffer support seat 48 and the support leg end plate 452, avoiding the displacement of the buffer support seat 48 and the support leg 45 to affect the buffer action of the buffer support seat 48. Meanwhile, the small volume of the buffer support seat 48 is easy to manufacture, so that the buffer support seat 48 also has the advantage of low cost.

[0027] Preferably, the buffer support seat 48 is made of high-damping rubber material, and the high-damping rubber material has very high damping characteristics, can absorb and dissipate mechanical energy, and reduce the transmission of vibration and impact.

[0028] Preferably, the buffer support seat 48 is in the shape of a circular truncated cone, the upper base of the buffer support seat 48 has a diameter consistent with the outer diameter of the end plate 452 of the support leg, and the lower base of the buffer support seat 48 has a diameter matching the acting surface of the box girder 1. The shape of the circular truncated cone can increase the contact area between the buffer support seat 48 and the box girder 1, and reduce the pressure concentration.

[0029] Preferably, the cable waterproof cover 49 is sleeved on the end of the beam end embedded pipe 46 away from the support leg 45, and the waterproof cover 410 is sleeved on the end of the cable waterproof cover 49 away from the beam end embedded pipe 46. One end of the cable 47 is connected to the connecting sleeve 44, and the other end of the cable 47 passes through the beam end embedded pipe 46, the cable waterproof cover 49 and the waterproof cover 410 in sequence. The beam end embedded pipe 46, the cable waterproof cover 49 and the waterproof cover 410 form a protection structure to prevent rainwater and water vapor from directly contacting the cable 47.

[0030] Preferably, one end of the shockproof stay rope 8 is fixedly connected to the cable 47 after passing through the waterproof cover 410, and the other end of the shockproof stay rope 8 is fixed on the box girder 1. The shockproof stay rope 8 prevents the cable 47 from oscillating.

[0031] Specifically, a sensor is installed on the shockproof stay rope 8, and the signal line of the sensor is connected to a monitoring device. The height of the sensor is detected, and the running state of the cable 47 is indirectly detected.

[0032] Preferably, the box girder 1 is provided with a water seepage prevention device, the water seepage prevention device is provided with a first through hole 51 for the beam end embedded pipe 46 to pass through and a second through hole 52 for the shockproof stay rope 8 to pass through. A first annular groove is formed in the first through hole 51, and an annular expansion waterstop is arranged in the first annular groove. The annular expansion waterstop can surround the beam end embedded pipe 46 to prevent liquid water from flowing into the gap between the beam end embedded pipe 46 and the first through hole 51. A second annular groove is formed in the second through hole 52, and an annular expansion waterstop is also arranged in the second annular groove. The annular expansion waterstop surrounds the shockproof stay rope 8 to prevent liquid water from flowing into the gap between the shockproof stay rope 8 and the second through hole 52.

[0033] Specifically, a plurality of shockproof stay ropes 8 are arranged, the upper ends of the shockproof stay ropes 8 are fixedly connected to the waterproof cover 410 by bolts, and the lower ends of the shockproof stay ropes 8 are fixedly connected to the box girder 1 by foundation bolts. The annular expansion waterstop in the second annular groove can prevent liquid water from flowing into the gap between the shockproof stay rope 8 and the second through hole 52, thereby avoiding the liquid water flowing to the foundation bolts to cause rust, and avoiding the shockproof stay rope 8 from loosening.

[0034] Preferably, the water seepage prevention device comprises: a first mounting block 53, a second mounting block 54, a third mounting block 55 and a locking structure; the second mounting block 54 and the third mounting block 55 are located on one side of the first mounting block 53, the second mounting block 54 and the third mounting block 55 are oppositely arranged, the first mounting block 53, the second mounting block 54 and the third mounting block 55 abut each other in pairs, and the first mounting block 53, the second mounting block 54 and the third mounting block 55 all abut the upper surface of the box girder 1; the first through hole 51 is divided into three parts by the first mounting block 53, the second mounting block 54 and the third mounting block 55, and the second through hole 52 is divided into two parts by the second mounting block 54 and the third mounting block 55; and the locking structure is used to fix the first mounting block 53, the second mounting block 54 and the third mounting block 55 as a whole. If the first through hole 51 and the second through hole 52 are formed by combining two mounting blocks as usual, the expansion waterstop in the first annular groove and the expansion waterstop in the second annular groove cannot be reliably compressed due to the large difference in diameter between the shock-absorbing pull rope 8 and the beam-end embedded pipe 46. For example, the expansion waterstop in the first annular groove is tightly wrapped around the outer periphery of the beam-end embedded pipe 46 after being compressed, but due to errors, part of the expansion waterstop in the second annular groove cannot be compressed to adhere to the shock-absorbing pull rope 8, which may cause water leakage. However, this problem can be solved by assembling the three mounting blocks in steps. Specifically, the second mounting block 54 and the third mounting block 55 are first spliced together and locked, the two parts of the second through hole 52 on the second mounting block 54 and the third mounting block 55 clamp the expansion waterstop, so that the expansion waterstop can be tightly attached to the outer periphery of the shock-absorbing pull rope 8 and the inner wall of the second annular groove. Then, the first mounting block 53 is assembled to the combination of the second mounting block 54 and the third mounting block 55, and the first mounting block 53 is locked to compress the three parts of the first through hole 51 on the first mounting block 53, the second mounting block 54 and the third mounting block 55, so that the expansion waterstop can be tightly attached to the outer periphery of the beam-end embedded pipe 46 and the inner wall of the first annular groove.

[0035] Preferably, the locking structure comprises: a first bolt 561, a second bolt 562, a third bolt 563 and a fourth bolt 564; the first bolt 561 is used to connect the first mounting block 53 and the second mounting block 54, the second bolt 562 is used to connect the first mounting block 53 and the third mounting block 55, the third bolt 563 is used to connect the second mounting block 54 and the third mounting block 55 from the side of the second mounting block 54 and the third mounting block 55 away from the box girder 1, and the fourth bolt 564 is used to connect the second mounting block 54 and the third mounting block 55 from the side of the second mounting block 54 and the third mounting block 55 away from the first mounting block 53.

[0036] Specifically, the side surface of the first mounting block 53 is pre-buried with a first ear plate with a through hole, the side surface of the second mounting block 54 is pre-buried with a second ear plate with a through hole, the first ear plate and the second ear plate are opposite; the upper surface of the first mounting block 53 is pre-buried with a third ear plate with a through hole, the upper surface of the second mounting block 54 is pre-buried with a fourth ear plate with a through hole, the third ear plate and the fourth ear plate are opposite; two groups of first bolts 561 are respectively locked after passing through the first ear plate and the second ear plate, the third ear plate and the fourth ear plate to realize the connection of the first mounting block 53 and the second mounting block 54.

[0037] The other side surface of the first mounting block 53 is pre-buried with a fifth ear plate with a through hole, the side surface of the third mounting block 55 is pre-buried with a sixth ear plate with a through hole, the fifth ear plate and the sixth ear plate are opposite; the upper surface of the first mounting block 53 is pre-buried with a seventh ear plate with a through hole, the upper surface of the third mounting block 55 is pre-buried with an eighth ear plate with a through hole, the seventh ear plate and the eighth ear plate are opposite; two groups of second bolts 562 are respectively locked after passing through the fifth ear plate and the sixth ear plate, the seventh ear plate and the eighth ear plate to realize the connection of the first mounting block 53 and the third mounting block 55.

[0038] The side surface and the upper surface of the second mounting block 54 away from the first mounting block 53 are pre-buried with a ninth ear plate with a through hole, the side surface and the upper surface of the third mounting block 55 away from the first mounting block 53 are pre-buried with a tenth ear plate with a through hole; the ninth ear plate on the upper surface of the second mounting block 54 is opposite to the tenth ear plate on the upper surface of the third mounting block 55, a third bolt 563 is locked after passing through the corresponding ninth ear plate and tenth ear plate to realize the connection of the second mounting block 54 and the third mounting block 55; the ninth ear plate on the side surface of the second mounting block 54 away from the first mounting block 53 is opposite to the tenth ear plate on the side surface of the third mounting block 55 away from the first mounting block 53, a fourth bolt 564 is locked after passing through the corresponding ninth ear plate and tenth ear plate to realize the connection of the second mounting block 54 and the third mounting block 55; the third bolt 563 and the fourth bolt 564 cooperate to realize the reliable connection of the second mounting block 54 and the third mounting block 55.

[0039] Preferably, the water seepage prevention device is provided with a gap slot 57 on the side facing the box girder 1, the gap slot 57 is communicated with the second through hole 52, and the gap slot 57 is divided into two parts by the second mounting block 54 and the third mounting block 55. The gap slot 57 is used to accommodate the anchor bolt at the lower end of the shock-absorbing pull rope 8.

[0040] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A bridge low tower cable-stayed structure, comprising: The tensioning nut (41), the cable pull jack (42), the tensioning rod (43), the connecting sleeve (44), the supporting leg (45), the beam end embedded pipe (46) and the cable body (47) are characterized in that a buffer supporting seat (48) is further arranged between the box girder (1) and the supporting leg (45), one side of the buffer supporting seat (48) abuts against the box girder (1) and the other side abuts against the supporting leg (45), the buffer supporting seat (48) is made of elastic material; the supporting leg (45) comprises a cylindrical supporting leg protective shell (451) and a ring-shaped supporting leg end plate (452), the supporting leg end plate (452) is fixed at the opening end of the supporting leg protective shell (451); the buffer supporting seat (48) and the supporting leg end plate (452) are sleeved on the beam end embedded pipe (46), the inner diameter of the buffer supporting seat (48) and the supporting leg end plate (452) is consistent with the outer diameter of the beam end embedded pipe (46); the end of the beam end embedded pipe (46) extends into the supporting leg (45) and is fixed with a ring-shaped embedded pipe pressing plate (461), the embedded pipe pressing plate (461) abuts against the surface of the supporting leg end plate (452) away from the buffer supporting seat (48), the outer diameter of the embedded pipe pressing plate (461) is consistent with the inner diameter of the supporting leg protective shell (451).

2. The low-pylon cable-stayed bridge structure according to claim 1, wherein, The buffer supporting seat (48) is made of high-damping rubber material.

3. The low-pylon cable-stayed bridge structure of claim 1, wherein, The buffer supporting seat (48) is in the shape of a circular truncated cone, the upper base diameter of the buffer supporting seat (48) is consistent with the outer diameter of the supporting leg end plate (452), and the lower base diameter of the buffer supporting seat (48) is matched with the acting surface of the box girder (1).

4. The low-pylon cable-stayed bridge structure of claim 1, wherein, The cable body waterproof cover (49) is sleeved on the end of the beam end embedded pipe (46) away from the supporting leg (45) after penetrating out of the box girder (1), the cable body waterproof cover (49) is sleeved with a waterproof cover (410) at the end away from the beam end embedded pipe (46); one end of the cable body (47) is connected with the connecting sleeve (44), and the other end sequentially penetrates through the beam end embedded pipe (46), the cable body waterproof cover (49) and the waterproof cover (410).

5. The low-pylon cable-stayed bridge structure of claim 4, wherein, One end of the waterproof cover (410) is fixedly connected with one end of the shockproof pull rope (8), and the other end of the shockproof pull rope (8) is fixed on the box girder (1).

6. The low-pylon cable-stayed bridge structure according to claim 5, wherein The box girder (1) is provided with a water seepage prevention device, the water seepage prevention device is provided with a first through hole (51) for the beam end embedded pipe (46) to penetrate through and a second through hole (52) for the shockproof pull rope (8) to penetrate through; a first annular groove is arranged in the first through hole (51), and a ring-shaped expansion waterstop is arranged in the first annular groove; a second annular groove is arranged in the second through hole (52), and a ring-shaped expansion waterstop is also arranged in the second annular groove.

7. The low-pylon cable-stayed bridge structure of claim 6, wherein, The water seepage prevention device comprises a first mounting block (53), a second mounting block (54), a third mounting block (55) and a locking structure, the second mounting block (54) and the third mounting block (55) are located on one side of the first mounting block (53), the second mounting block (54) and the third mounting block (55) are oppositely arranged, the first mounting block (53), the second mounting block (54) and the third mounting block (55) abut each other in pairs, and the first mounting block (53), the second mounting block (54) and the third mounting block (55) abut the upper surface of the box girder (1); the first through hole (51) is divided into three parts by the first mounting block (53), the second mounting block (54) and the third mounting block (55), and the second through hole (52) is divided into two parts by the second mounting block (54) and the third mounting block (55); the locking structure is used for fixing the first mounting block (53), the second mounting block (54) and the third mounting block (55) as a whole.

8. The low-pylon cable-stayed bridge structure of claim 7, wherein, The locking structure comprises a first bolt (561), a second bolt (562), a third bolt (563) and a fourth bolt (564), the first bolt (561) is used for connecting the first mounting block (53) and the second mounting block (54), the second bolt (562) is used for connecting the first mounting block (53) and the third mounting block (55), the third bolt (563) is used for connecting the second mounting block (54) and the third mounting block (55) from the side of the second mounting block (54) and the third mounting block (55) away from the box girder (1), and the fourth bolt (564) is used for connecting the second mounting block (54) and the third mounting block (55) from the side of the second mounting block (54) and the third mounting block (55) away from the first mounting block (53).

9. The low-pylon cable-stayed bridge structure of claim 8, wherein, The water seepage prevention device is provided with a gap slot (57) on the side facing the box girder (1), the gap slot (57) communicates with the second through hole (52), and the gap slot (57) is divided into two parts by the second mounting block (54) and the third mounting block (55).

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