Arch segment hoisting and beam falling positioning system for leaning type tie bar arched beam

Abstract

The utility model belongs to the related technical field of steel structure bridge construction corollary equipment, and discloses a leaning type tie bar arched beam arch segment hoisting and beam falling positioning system which comprises elevation adjusting units and fine adjustment units, the elevation adjusting units are temporary sand boxes installed at the four corners of each support, and the fine adjustment units are arranged on the temporary sand boxes. Each temporary sand box is slightly higher than the top surface of the support and is used for synchronously releasing the inland river sand in all the temporary sand boxes after the arched girder arch section is stable, so that the weight of the steel structure is transferred to the support; the fine adjustment unit comprises a plurality of round steel pull rings and a plurality of steel plate pull rings, and the positions of the steel structures are finely adjusted by pulling the pull rings respectively. The system can further comprise a limiting unit. According to the utility model, the mounting and positioning speed of various leaning type tie bar arched girders can be effectively improved, the construction quality and efficiency of a steel structure bridge are improved, and the device is particularly suitable for hoisting application occasions of large-tonnage arched girders.

Description

Technical Field

[0001] The utility model belongs to the technical field related to supporting equipment for steel structure bridge construction, and more specifically relates to an inclined tie rod arch beam arch segment hoisting and beam dropping positioning system. Background Art

[0002] As a steel structure landscape bridge that adds highlights to the city, the leaning tie arch has the characteristics of novel shape, beautiful structure, and durability. However, due to the unbalanced weight of the main beam arch and the side beam arch segment of the leaning tie arch, it is easy to be eccentric during the hoisting process and damage the support. It is also difficult to achieve accurate positioning of large-tonnage steel structures, so high requirements are put forward for the accurate positioning of the leaning tie arch beam arch segment. In particular, in order to reduce safety risks, the single-approved closure time of the maritime department is getting shorter and shorter, which requires the leaning tie arch beam arch segment to be installed quickly and accurately, and to select a suitable leaning tie arch beam arch segment hoisting and beam positioning device.

[0003] The search revealed that in the prior art, the positioning and installation of beam arches during bridge construction basically adopts the method of drawing the edge line of the steel structure and adjusting it through a hand winch. However, this method has poor precision control and cannot achieve rapid construction.

[0004] Accordingly, the art is in urgent need of further improvement or modification to better meet the high-quality and high-efficiency requirements of inclined tie-rod arch beam lifting. Utility Model Content

[0005] In view of the above defects or needs of the prior art, the purpose of the utility model is to provide a system for lifting and positioning arch segments of inclined tie arch beams, wherein targeted improvements are made to the specific structural composition and setting methods of the lifting and positioning system of the beams by fully combining the specific needs of the construction of inclined tie arch bridges, which can effectively improve the installation and positioning speed of various types of inclined tie arch beams, improve the construction quality and efficiency of steel structure bridges, and is particularly suitable for lifting applications of large-tonnage arch beams.

[0006] To achieve the above-mentioned purpose, according to the utility model, a leaning type tie rod arch beam arch segment hoisting beam positioning system is provided, characterized in that the system comprises a height adjustment unit and a fine adjustment unit, wherein:

[0007] The elevation adjustment unit is installed on the temporary sand boxes at the four corners of each support, wherein the height of each temporary sand box is slightly higher than the top surface of the support, and is used to synchronously release the river sand in all temporary sand boxes after the arch beam and arch section beam are stable, thereby transferring the weight of the steel structure to the support;

[0008] The fine-tuning unit includes a plurality of round steel pull rings and steel plate pull rings, wherein the round steel pull ring is pre-buried in the top of the main pier cap beam, and the steel plate pull ring is welded to both ends of the arch beam and arch section beam, and the position of the steel structure is fine-tuned by pulling these pull rings respectively.

[0009] Further preferably, the above system also includes a limiting unit, which includes a Q235 steel plate embedded in the top of the main pier cap beam, a rectangular limiting steel plate welded on the top of the Q235 steel plate, and a square Q235 limiting steel welded to the side of the end cross beam of the arch beam arch section beam.

[0010] Further preferably, the height of the temporary sand box is 1 mm to 2 mm higher than the top surface of the support.

[0011] Further preferably, the river sand in the temporary sand box is released synchronously by a high-pressure water gun.

[0012] Further preferably, the round steel pull ring is a φ32 round steel pull ring, and the steel plate pull ring is a Q235 steel plate pull ring.

[0013] Further preferably, the fine-tuning unit is pulled by a plurality of hand hoists.

[0014] In general, the above technical solutions conceived by the utility model have the following technical advantages compared with the prior art:

[0015] 1. The utility model sets a plurality of temporary pre-compression sand boxes to ensure that the large-tonnage beam arch segments are not damaged by uneven pressure on the top of the support during the beam dropping process; at the same time, the pull ring on the top of the main pier and the pull ring on the end of the steel structure can be used to adjust the length through a hand winch to avoid shaking of the large-tonnage beam arch segments during the beam dropping process, thereby ensuring the accurate positioning of the beam arch segments;

[0016] 2. The utility model further realizes accurate positioning of large-tonnage beam-arch steel structures by precisely installing the top steel of the main pier and the end steel of the steel structure and limiting each other;

[0017] 3. The overall structure of the hoisting stabilization system according to the utility model is compact and easy to operate. The positioning device is simple to operate and easy to install and disassemble, which greatly improves the efficiency of the hoisting and beam dropping construction. Therefore, it is particularly suitable for large-tonnage inclined tie arch beam arch segment hoisting and beam dropping construction applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a side view for exemplarily showing a positioning system according to the utility model;

[0019] Figure 2 It is a front view for exemplarily showing the positioning system according to the utility model;

[0020] Figure 3 is a top view for demonstratively showing a positioning system according to the utility model;

[0021] Figure 4 is a front view of a temporary sand box according to a specific embodiment;

[0022] Throughout the drawings, the same reference numerals are used to denote the same elements or structures, wherein:

[0023] 1-Rebar pull ring; 2-Steel pull ring; 3-Main pier cap beam limiting steel; 4-Steel structure limiting steel; 5-Temporary sand box. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] Figure 1 is a side view for exemplarily showing a positioning system according to the utility model, Figure 2 is a front view for demonstratively showing a positioning system according to the utility model, Figure 3 FIG. 2 is a top view for exemplarily showing the positioning system according to the present utility model. Figure 1-3 As shown, the positioning system according to the present utility model mainly includes components such as an elevation adjustment unit and a fine adjustment unit. In addition, it can also include a limit unit as needed, which will be specifically described one by one below.

[0026] The elevation adjustment unit is installed on the temporary sand boxes at the four corners of each support, wherein the height of each temporary sand box is slightly higher than the top surface of the support, and is used to synchronously release the river sand in all temporary sand boxes after the arch beam and arch section beam are stable, thereby transferring the weight of the steel structure to the support;

[0027] The fine-tuning unit includes a plurality of round steel pull rings and steel plate pull rings, wherein the round steel pull ring is pre-buried in the top of the main pier cap beam, and the steel plate pull ring is welded to both ends of the arch beam and arch section beam, and the position of the steel structure is fine-tuned by pulling these pull rings respectively.

[0028] In addition, the limiting unit includes a Q235 steel plate embedded in the top of the main pier cap beam, a rectangular limiting steel plate welded on the top of the Q235 steel plate, and a square Q235 limiting steel welded on the side of the end cross beam of the arch beam arch section beam.

[0029] See also Figure 1-3 In a specific example, the elevation adjustment unit includes, for example, a temporary sand box installed at each corner of each support pad stone. The sand box specifications are: upper sand box 219*6*250mm, lower sand box 180*6*200mm, the purpose is to eliminate the eccentric force of the support that causes the support to be damaged when directly falling on the support during hoisting. In this way, by setting sand boxes at the four corners of the support, the weight that the 16 sand boxes need to bear is determined by reverse calculation according to the weight of the large-tonnage steel structure, and pre-pressed with a press in the test room, the pressure is not less than 1.2 times the design weight, and the height of the sand box is 1 to 2 mm higher than the top surface of the support. Then the sand box is temporarily fixed, and after the large-tonnage beam arch section beam is stable, the river sand in the sand box is cleared with a high-pressure water gun, and the natural sand in the 16 sand boxes is released simultaneously, so that the entire bridge falls slowly and evenly onto the support, completing the force conversion of the entire bridge, and ensuring that the elevation of the dropped beam meets the requirements.

[0030] For the fine-tuning unit, in a specific example, it includes, for example, pre-embedded φ32 round steel pull rings at the top of the main pier cap beam for on-site hand chain hoist fixing, with the inner diameter of the lifting lug not less than 60mm, the pre-embedded depth not less than 500mm, and no less than 4 on each side. Two Q235 steel plate pull rings are welded at both ends of the large-tonnage steel structure, and the position of the large-tonnage steel structure is fine-tuned by four 5-ton hand chain hoists to ensure that the installation position of the steel structure accurately meets the design and specification requirements.

[0031] For the limiting unit, in a specific example, it includes, for example, pre-embedding a Q235 steel plate on the top of the two main pier cap beams, welding 6 Q235 rectangular limiting steel plates on the top of the steel plates, and welding a square Q235 limiting steel on each side of the end cross beam of the large-tonnage steel structure. When installing the large-tonnage steel structure, the limiting is achieved through the top steel plate of the main pier cap beam and the end steel plate of the end cross beam.

[0032] In summary, the overall structure of the hoisting and stabilizing system of the utility model is compact and easy to operate, the positioning device is simple to operate, and the installation and disassembly are convenient, which greatly improves the efficiency of the hoisting and beam dropping construction. Therefore, it is particularly suitable for large-tonnage inclined tie arch beam arch segment hoisting and beam dropping construction applications, and has broad application prospects.

[0033] It is easy for those skilled in the art to understand that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A leaning tie-rod arch beam arch segment hoisting and beam positioning system, characterized in that: The system includes an elevation adjustment unit and a fine adjustment unit, wherein: The elevation adjustment unit is a temporary sand box installed at the four corners of each support, wherein the height of each temporary sand box is slightly higher than the top surface of the support, and is used to synchronously release the river sand in all temporary sand boxes after the arch beam and arch section beam are stable, thereby transferring the weight of the steel structure to the support; The fine-tuning unit includes a plurality of round steel pull rings and steel plate pull rings, wherein the round steel pull ring is pre-buried in the top of the main pier cap beam, and the steel plate pull ring is welded to both ends of the arch beam and arch section beam, and the position of the steel structure is fine-tuned by pulling these pull rings respectively.

2. The leaning tie-rod arch beam arch segment hoisting and beam positioning system according to claim 1, characterized in that: The above system also includes a limiting unit, which includes a Q235 steel plate embedded in the top of the main pier cap beam, a rectangular limiting steel plate welded on the top of the Q235 steel plate, and a square Q235 limiting steel welded on the side of the end cross beam of the arch beam arch section beam.

3. The leaning tie-rod arch beam arch segment hoisting and beam positioning system according to claim 1 or 2, characterized in that: The height of the temporary sand box is 1 mm to 2 mm higher than the top surface of the support.

4. The leaning tie-rod arch beam arch segment hoisting and beam positioning system according to claim 3, characterized in that: The river sand in the temporary sand box is released synchronously through a high-pressure water gun.

5. The leaning tie-rod arch beam arch segment hoisting and beam positioning system according to claim 4, characterized in that: The round steel pull ring is a φ32 round steel pull ring, and the steel plate pull ring is a Q235 steel plate pull ring.

6. The leaning tie-rod arch beam arch segment hoisting and beam positioning system according to claim 5, characterized in that: The fine-tuning unit is pulled by a plurality of hand hoists.

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