Device for tensioning arch bridge suspender in limited space

Abstract

The utility model provides a device for tensioning an arch bridge suspender in a limited space, which comprises a carrying pole beam, the two ends of the carrying pole beam are respectively provided with a jack, the carrying pole beam comprises a first half beam, a second half beam and a locking piece, the first half beam and the second half beam are tiled and spliced and are locked by the locking piece, and the first half beam and the second half beam are connected with each other through the locking piece. The first half beam and the second half beam are spliced to form a first through hole, and the first through hole is used for a tensioning rod to penetrate through. The weight of a single component is reduced, the required tensioning space is small, and construction is more flexible.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of prestress, especially a device for arch bridge suspender tensioning in limited space. BACKGROUND

[0002] For the tensioning of the suspender of the steel arch rib bridge, the current operation mode is that: when the arch bridge suspender is tensioned, the tensioning device is mainly composed of one jack, one support foot, one tensioning rod and one tensioning nut. The support foot is sleeved outside the anchor head and the anchor head nut, one jack is arranged on the support foot, the tensioning rod passes through the jack, and the tensioning nut is arranged at the top of the jack. However, the current process has the following shortcomings: 1. The single component is heavy and not easy to transfer, and needs to be matched with hoisting equipment, which is high in cost; 2. A larger tensioning space is needed, and sometimes the whole needs to be disassembled and assembled, which is high in installation difficulty and low in efficiency; 3. The use of the support foot is limited by whether the size of the opening matches the anchor head nut, and the universality is poor and the use cost is high. SUMMARY

[0003] The utility model aims at providing a device for arch bridge suspender tensioning in limited space, which reduces the weight of the single component, needs a small tensioning space and is more flexible in construction.

[0004] A device for arch bridge suspender tensioning in limited space, comprising a carrying beam, both ends of the carrying beam are provided with jacks, the carrying beam comprises a first half beam, a second half beam and a locking piece, the first half beam and the second half beam are laid flat and spliced and locked by the locking piece, a first through hole is formed between the first half beam and the second half beam for the tensioning rod to pass through.

[0005] In one of the embodiments, a first pad is arranged between the jack and the carrying beam.

[0006] In one of the embodiments, the first pad is provided with a neck portion, a limiting hole is formed between the first half beam and the second half beam, and the neck portion is inserted into the limiting hole.

[0007] In one of the embodiments, an enlarged portion is arranged at the end of the neck portion, the neck portion passes through the limiting hole, and the enlarged portion limits the neck portion from being pulled out of the limiting hole.

[0008] In one of the embodiments, the device for arch bridge suspender tensioning in limited space further comprises a tensioning rod and a tensioning nut arranged on the tensioning rod, and the tensioning rod passes through the first through hole.

[0009] In one of the embodiments, a second pad is arranged between the tensioning nut and the carrying beam.

[0010] In one of the embodiments, the second pad is provided with a second through hole, and the tension rod passes through the second through hole.

[0011] In one of the embodiments, the locking member comprises a screw rod and a locking nut, the first half beam is provided with a third through hole, the second half beam is provided with a fourth through hole, the third through hole and the fourth through hole are communicated when the first half beam and the second half beam are spliced, and the screw rod passes through the third through hole and the fourth through hole and is locked by the locking nut.

[0012] In one of the embodiments, the device for arch bridge suspender tensioning in a limited space comprises two or more than two flat shoulder beams, and the two or more than two flat shoulder beams are stacked.

[0013] In one of the embodiments, the first half beam and the second half beam are spliced to form a limiting hole, and the limiting holes of two adjacent flat shoulder beams are aligned and communicated.

[0014] In one of the embodiments,

[0015] Compared with the prior art, the device for arch bridge suspender tensioning in a limited space has the following advantages:

[0016] 1. The jack is arranged between the flat shoulder beam and the supporting surface, thereby saving height and facilitating operation in a small space; the flat shoulder beam is in two parts, thereby reducing the weight of the single component, facilitating manual transfer, locking the two parts into a whole by the screw rod and the nut, and ensuring the strength of the structure.

[0017] 2. Two or more than two jacks are used to realize the extension and retraction of the cylinder through synchronous control of the hydraulic system, thereby ensuring tensioning accuracy, eliminating the defects of using one large-size jack to occupy tensioning space, being difficult to remove, and being heavy, and enabling the multiple smaller jacks to be manually or simply hoisted to the arch rib, thereby eliminating the need for large hoisting equipment, improving construction efficiency, and improving the versatility.

[0018] 3. After tensioning, the components can be removed one by one, the single component is light in weight, the whole equipment is not needed for removal, the tensioning space is small, and the construction is more flexible.

[0019] The utility model will become more clear through the following description and combining with the drawings, and these drawings are used to explain the embodiments of the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of 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 prior art description, obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0021] Figure 1 is a front view structural schematic diagram of a device for arch bridge suspender tensioning in a limited space according to an embodiment of the present application;

[0022] Figure 2 is a top view structural schematic diagram of a device for arch bridge suspender tensioning in a limited space according to an embodiment of the present application;

[0023] Figure 3 is a structural schematic diagram of a first half beam and a second half beam spliced together according to an embodiment of the present application;

[0024] Figure 4 is a structural schematic diagram of a first pad according to an embodiment of the present application;

[0025] Figure 5 is a structural schematic diagram of a second pad according to an embodiment of the present application;

[0026] Figure 6 is a structural schematic diagram of a first pad mounted on a carrying beam according to an embodiment of the present application;

[0027] Figure 7 is a structural schematic diagram of a plurality of carrying beams stacked according to an embodiment of the present application Figure 1 .

[0028] Figure 8 is a structural schematic diagram of a plurality of carrying beams stacked according to an embodiment of the present application Figure 2 .

[0029] Wherein, 1, tensioning rod, 2, tensioning nut, 3, second pad, 4, carrying beam, 5, 6, first pad, 7, anchor head, 8, anchor head nut, 9, first half beam, 10, 13, screw rod, 11, 12, 14, 15, locking nut, 16, 17, jack, 18, second half beam, 19, first through hole, 20, second through hole, 21, third through hole, 22, fourth through hole, 23, limiting hole, 24, neck, 25, bulge, 26, locking piece. DETAILED DESCRIPTION

[0030] Embodiments of the present application will now be described with reference to the accompanying drawings.

[0031] In the description of the utility model, it is necessary to explain that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate the position relationship based on the position relationship shown in the drawing, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0032] In the description of the utility model, it should be pointed out that, unless otherwise specified and limited, the terms "installation", "provided with", "connection" and the like should be understood broadly, for example, "connection" can be fixed connection, can also be detachable connection, or integral connection, can be mechanical connection, can also be electrical connection, can be directly connected, can also be indirectly connected through an intermediate medium, and can be the communication between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0033] As shown in Figures 1 to 8 , the utility model discloses a device for arch bridge suspender tensioning in limited space, which comprises a carrying beam 4, and a jack is arranged at each end of the carrying beam 4, as shown in Figure 1 , the jacks 16 and 17 are located at the two ends of the carrying beam 4, and the carrying beam 4 comprises a first half beam 9, a second half beam 18 and a locking piece 26, the first half beam 9 and the second half beam 18 are laid flat and spliced and locked by the locking piece, as shown in Figure 2 、 3 , a first through hole 19 is formed between the first half beam 9 and the second half beam 18, and the first through hole 19 is used for passing the tensioning rod 1, specifically, the first half beam 9 is provided with a semicircle, the second half beam 18 is also provided with a semicircle, after the first half beam 9 and the second half beam 18 are spliced, the two semicircles are spliced into a whole circle, that is, the first through hole 19 is formed between the first half beam 9 and the second half beam 18. In the embodiment, one jack is arranged at each end of the carrying beam 4, but it is not limited to the embodiment, and more than two jacks can be arranged at each end of the carrying beam 4.

[0034] As shown in Figure 2 、 3The locking member 26 includes screw rods 10, 13, and locking nuts 11, 12, 14, and 15. The first half beam 9 is provided with a third through hole 21, and the second half beam 18 is provided with a fourth through hole 22. When the first half beam 9 and the second half beam 18 are assembled, the third through hole 21 and the fourth through hole 22 are connected. The screw rods 10, 13 pass through the third through hole 21 and the fourth through hole 22 and are locked with the locking nuts 11, 12, 14, and 15. A locking nut 11, 12, 14, and 15 are respectively provided at both ends of the screw rods 10, 13.

[0035] This embodiment further includes a tensioning rod 1 and a tensioning nut 2 mounted on the tensioning rod 1. The tensioning rod 1 extends through a first through-hole 19. The tensioning rod 1 is connected to an anchor head 7, which is provided with an anchor nut 8. The anchor nut 8 and the tensioning nut 2 are located on either side of the shoulder beam 4. The jacks 16 and 17 and the anchor nut 8 are located on the same side of the shoulder beam 4.

[0036] The utility model adopts a two-piece shoulder beam 4 to reduce the weight of the individual components and facilitate manual transfer. The beam is locked into a whole by screws 10, 13 and locking nuts 11, 12, 14, 15 to ensure the strength of the structure. The conventional support leg needs to be placed outside the anchor nut 8. The utility model is not limited by the size of the anchor nut 8 and has strong versatility.

[0037] In the present invention, the jacks 16 and 17 are arranged between the shoulder beam 4 and the supporting surface, which saves height and is conducive to working in a small space. Two or more jacks 16 and 17 are used to realize the telescopic cylinder through synchronous control of the hydraulic system to ensure the tensioning accuracy, eliminating the disadvantages of using a large-sized jack 16 and 17 to occupy the tensioning space, be difficult to dismantle, and be heavy. Multiple smaller jacks 16 and 17 can be transported to the arch rib manually or with simple lifting equipment, without the need to coordinate the use of large lifting equipment, thereby improving construction efficiency.

[0038] like Figure 1 As shown, first spacers 5 and 6 are provided between the jacks 16 and 17 and the shoulder beam 4. Figure 4 As shown, the first cushion block 5 is provided with a neck 24, and the first half beam 9 and the second half beam 18 are assembled to form a limiting hole 23, and the neck 24 is inserted into the limiting hole 23. The end of the neck 24 is provided with an enlarged portion 25, and the neck 24 passes through the limiting hole 23. The enlarged portion 25 restricts the neck 24 from escaping from the limiting hole 23. Figure 6As shown, the neck 24 passes through the limiting hole 23, the first pad 5 and the bulge 25 is clamped on both sides of the beam 4, the first pad 5 can be limited on the beam 4 (the first pad 6 is the same structure as the first pad 5, and the first pad 5 is taken as an example to be described, and the first pad 6 will not be described again). In this embodiment, the end of the neck 24 is provided with the bulge 25, and the neck 24 passes through the limiting hole 23, but is not limited to this embodiment, and can also be designed as the neck inserted into the limiting hole without passing through the limiting hole, or without the bulge, as long as the neck is inserted into the limiting hole, the limiting and positioning functions can be realized.

[0039] The second pad 3 is arranged between the tensioning nut 2 and the beam 4. Figure 5 As shown, the second pad 3 is provided with a second through hole 20, and the tensioning rod 1 passes through the second through hole 20. By arranging the first pad 5, 6 and the second pad 3, the stress can be dispersed, the size of the two-part beam 4 can be reduced, the monomer weight can be further reduced, and the labor intensity of manual carrying can be reduced. The first pad 5, 6 and the second pad 3 can be a cylinder, an elliptical cylinder, a cuboid or other shapes.

[0040] After the tensioning of this embodiment is completed, the components can be disassembled one by one, the monomer weight is small, the whole device does not need to be disassembled, the required tensioning space is small, and the construction is more flexible.

[0041] Further, as shown in the figure, Figure 7 This embodiment can include two or more beams 4, and the two or more beams 4 are arranged in layers. The limiting hole 23 is formed by splicing the first half beam 9 and the second half beam 18, and the limiting holes 23 of the adjacent two beams 4 are aligned and communicated with each other. The neck 24 of the first pad 5, 6 passes through the limiting holes 23 of different beams 4 at the same time, which can limit the relative position between the beams 4 and ensure the structural strength.

[0042] Further, as shown in the figure, Figure 8 The beams 4 arranged in layers can be of the same size or different sizes, and the combination of multiple beams 4 can meet the requirements of different lengths and strengths.

[0043] In the construction process, the specific use steps are as follows:

[0044] Step one: preliminary preparation, complete the calibration of the jacks 16, 17. Transport the device to the hoist rod tensioning point in the arch rib anchor box, pass the screw rods 10, 13 through the third through hole 21 and the fourth through hole 22 of the beam 4, and lock them with the locking nuts 11, 12, 14, 15. Place the jacks 16, 17 to the designated place, set the jacks 16, 17, assemble the beam 4 and the first pad 5, 6, the tensioning rod 1 is connected with the tensioning nut 2 through threads, the tensioning rod 1 is limited by the tensioning nut 2 after passing through the first through hole 19 in the middle of the beam 4, the tensioning nut 2 is placed on the second pad 3, and the two are in smooth surface contact;

[0045] Step two: use the winch or truck crane to send the boom anchor head 7 into the arch rib anchor box, lock with anchor head nut 8, and screw thread connection between tension rod 1 and anchor head 7;

[0046] Step three: use pump station and hydraulic system to control jack 16, 17 to extend cylinder at the same time, first pad 5, 6, beam 4, second pad 3, tension nut 2, tension rod 1 are lifted upward together, then drive the boom anchor head 7 to move upward until the tension stroke of jack 16, 17 is completed;

[0047] Step four: lock the oil pressure, lock the anchor head 7 with anchor head nut 8, and jack 16, 17 shrink cylinder, first pad 5, 6, beam 4, second pad 3, tension nut 2, tension rod 1 reset;

[0048] Step five: repeat step three and step four until the tension of single boom is completed;

[0049] Step six: after removing the screw rod 10, 13, locking nut 11, 12, 14, 15 of beam 4, remove the beam 4 from the side, then gradually remove the jack 16, 17, first pad 5, 6, second pad 3, tension rod 1, tension nut 2;

[0050] Step seven: manually transfer the above scattered components to the next arch rib anchor box boom tension point;

[0051] Step eight: repeat steps three, four, five and six until the tension of the whole bridge boom is completed.

[0052] The utility model has been described above in combination with the best embodiment, but the utility model is not limited to the above disclosed embodiments, and should cover various modifications, equivalent combinations according to the essence of the utility model.

Claims

1. A device for tensioning arch bridge suspender in a limited space, characterized in that, It comprises a beam, both ends of which are provided with a jack, the beam comprises a first half beam, a second half beam and a locking member, the first half beam and the second half beam are laid flat and spliced and locked by the locking member, a first through hole is formed between the first half beam and the second half beam for the tension rod to pass through.

2. A device for tensioning arch bridge suspender in limited space according to claim 1, characterized in that, A first pad is arranged between the jack and the beam.

3. A device for tensioning arch bridge suspender in limited space according to claim 2, characterized in that, The first pad is provided with a neck, a limiting hole is formed between the first half beam and the second half beam, and the neck is inserted into the limiting hole.

4. A device for tensioning arch bridge suspender in limited space according to claim 3, characterized in that, An enlarged portion is arranged at the end of the neck, the neck passes through the limiting hole, and the enlarged portion limits the neck from being pulled out of the limiting hole.

5. The device for tensioning the arch bridge suspender in a limited space according to claim 1, characterized in that, It also comprises a tension rod and a tension nut arranged on the tension rod, and the tension rod passes through the first through hole.

6. A device for tensioning arch bridge suspender in limited space according to claim 5, characterized in that, A second pad is arranged between the tension nut and the beam.

7. A device for tensioning arch bridge suspender in limited space according to claim 6, characterized in that, The second pad is provided with a second through hole, and the tension rod passes through the second through hole.

8. The device for tensioning the arch bridge suspender in a limited space according to claim 1, characterized in that, The locking member comprises a screw rod and a locking nut, the first half beam is provided with a third through hole, the second half beam is provided with a fourth through hole, the third through hole and the fourth through hole are communicated when the first half beam and the second half beam are spliced, the screw rod passes through the third through hole and the fourth through hole and is locked by the locking nut.

9. The device for stretching the arch bridge suspender in a limited space according to any one of claims 1-8, characterized in that, It comprises two or more beams, and the two or more beams are arranged in layers.

10. The device for tensioning the arch bridge suspender in a limited space according to claim 9, characterized in that, The limiting hole is formed between the first half beam and the second half beam, and the limiting holes of the two adjacent beams are aligned and communicated with each other.

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