Temporary supporting device for slippage construction of large-span prestressed arch structure

Abstract

A temporary support comprises a support body, a top support and a telescopic mechanism, the lower end of the support body is fixed to an arch foundation, the lower end of the top support is fixed to the upper end of the support body, and the lower end of the telescopic mechanism is fixed to the middle of the upper end of the top support. A limiting rod is arranged above the top end support, the telescopic end of the telescopic mechanism is fixedly connected with the middle of the bottom face of the limiting rod, the limiting rod is driven to move upwards or downwards through stretching and retracting of the telescopic mechanism, and jacking supporting or downward moving separation of the limiting rod and the corresponding position of the steel arch frame column is achieved. According to the utility model, the mounting and dismounting times of the temporary bracket can be effectively reduced, and the contact and separation states of the limiting rods and the steel arch columns are controlled only by adjusting the telescopic mechanisms, so that the assembled steel arch columns can be reliably supported and separated during sliding, the stability of an arch splicing structure is ensured, the continuity of subsequent sliding construction is not influenced, and the construction efficiency is improved. The construction efficiency is improved, and the construction cost is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of building support structures, and in particular relates to a temporary support device used for the sliding construction of a large-span prestressed arch frame structure. Background Art

[0002] In recent years, with the rapid development of large-span space structures in China, there are more and more large-span space structures such as large-span steel arch frames and large-span space aluminum alloy structures, and the application of prestressing on large-span structures is becoming more and more widespread. Aluminum alloy structures are lightweight, durable, and have high processing precision. They are widely used in sports buildings, transportation buildings, and cultural and technological buildings. Large-span prestressed structures introduce flexible cables on the basis of rigid structures. They are a large-span space prestressed system composed of rigid components, flexible cables, and intermediate vertical rods. With the improvement of my country's building function requirements, large-span prestressed arch frames are widely used in large-span steel structures such as exhibition halls.

[0003] For large-span arch structures, it is usually necessary to set up temporary supports for the arch arc segments. The conventional practice is to set up a cradle in the middle of the arc segment as a temporary support, and the temporary support is quickly disassembled and does not affect the subsequent sliding operation after the assembly is completed. However, in the actual load calculation and construction process, it is found that there may be a site in the middle of the temporary support frame structure that does not meet the requirements for setting up a cradle, and the actual disassembly and assembly of the support is cumbersome, which affects the construction speed and makes it difficult for the construction plan to proceed smoothly. Therefore, a simple and convenient device is needed to meet the construction requirements of the temporary support frame. Utility Model Content

[0004] The technical problem solved by the utility model is: to provide a temporary support device for the sliding construction of a large-span prestressed arch frame structure, which adopts a height-adjustable temporary support composed of a support body, a top support and a telescopic mechanism to support the steel arch frame column, which can effectively reduce the number of times the temporary support is installed and disassembled. It only needs to adjust the telescopic mechanism to control the contact and separation state of the limit rod and the steel arch frame column, so as to achieve reliable support and separation control of the assembled steel arch frame column during sliding, which not only ensures the stability of the arch frame assembly structure, but also does not affect the continuity of the subsequent sliding construction, improves the construction efficiency, reduces the construction cost, and has the advantages of simple construction and convenient operation, which can ensure the construction quality, construction period and save construction cost and other beneficial effects.

[0005] The technical solution adopted by the utility model: a temporary support device for sliding construction of a large-span prestressed arch frame structure, comprising a temporary support arranged on the inner side of a sliding track at a sliding starting position, the temporary support comprising a support body, a top support and a telescopic mechanism, the lower end of the support body is fixed to the arch frame foundation, and the lower end of the top support is fixed to the upper end of the support body, the lower end of the telescopic mechanism is fixed to the middle part of the upper end of the top support, a limit rod is provided above the top support, and the telescopic end of the telescopic mechanism is fixedly connected to the middle part of the bottom surface of the limit rod, and the limit rod is driven upward or downward by the telescopic mechanism to achieve tight support or downward separation at the corresponding position of the steel arch frame column.

[0006] Among them, the top bracket includes a frame at the lower end and pillars fixed centrally on both sides of the upper end of the frame. The frame is fixed to the upper end of the bracket body, a cross bar is fixedly connected between the two pillars, and the lower end of the telescopic mechanism is fixed to the middle of the upper end surface of the cross bar.

[0007] Furthermore, a notch is formed on the upper end of the limit rod toward the steel arch frame column and matches the corresponding position of the steel arch frame column, and a reinforcing rod is provided on the support column, which is fixedly connected to the lower end frame and is arranged away from the notch.

[0008] Furthermore, the telescopic mechanism adopts a jack with a lifting capacity ≥10t and a stroke ≥10cm.

[0009] Furthermore, the support body is made of ordinary pipe trusses or tower crane standard sections.

[0010] The advantages of this utility model compared with the prior art:

[0011] 1. This technical solution adopts a height-adjustable temporary support composed of a support body, a top support and a telescopic mechanism to support the steel arch frame column, which can effectively reduce the number of temporary support installation and disassembly times. It only needs to adjust the telescopic mechanism to control the contact and separation state of the limit rod and the steel arch frame column, so as to realize the reliable support and separation control of the assembled steel arch frame column during sliding, which not only ensures the stability of the arch frame assembly structure, but also does not affect the continuity of the subsequent sliding construction;

[0012] 2. This technical solution can ensure reliable support for the steel arch frame column, prevent side sliding, and improve the stability and reliability of the support structure by processing notches on the limit rods that match the corresponding positions of the steel arch frame columns;

[0013] 3. This technical solution improves construction efficiency, reduces construction costs, has the advantages of simple construction and convenient operation, and can ensure construction quality, construction period and save construction costs. The highly adjustable temporary support provides reliable support and avoidance conditions for the assembly and sliding of the arch frame including steel arch frame columns, aluminum alloy arch frame beams and prestressed cables. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the use state of the utility model;

[0015] Figure 2 It is a structural schematic diagram of the adaption support of the limit rod and the steel arch frame column in the temporary support of the utility model;

[0016] Figure 3 It is a schematic diagram of the connection structure of the top bracket and the telescopic mechanism of the utility model. DETAILED DESCRIPTION

[0017] The following will be combined with the embodiment of the present utility model Figure 1-3 , clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments 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.

[0018] It should be noted that, in this article, unless otherwise stated, it should be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0019] In this document, the terms "comprises", "comprising" or any other variation thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further limitations. The elements defined by the sentence "comprising a ..." do not exclude the presence of other identical elements in the process, method, article or device comprising the elements.

[0020] Temporary support device for sliding construction of large-span prestressed arch frame structure, such as Figure 1-3As shown, it includes a temporary support 1 arranged on the inner side of the sliding track at the starting position of the sliding, and the temporary support 1 includes a support body 1-1, a top support 1-2 and a telescopic mechanism 1-3. The lower end of the support body 1-1 is fixed to the arch frame foundation, and the lower end of the top support 1-2 is fixed to the upper end of the support body 1-1, and the lower end of the telescopic mechanism 1-3 is fixed to the middle of the upper end of the top support 1-2. A limit rod 1-4 is provided above the top support 1-2, and the telescopic end of the telescopic mechanism 1-3 is fixedly connected to the middle of the bottom surface of the limit rod 1-4, and the limit rod 1-4 is driven to move up or down by the telescopic movement of the telescopic mechanism 1-3, so as to realize the top support or down movement corresponding to the steel arch frame column 2. Shift and detach; in the above structure, the structure of supporting the steel arch frame column 2 with a height-adjustable temporary support 1 composed of a support body 1-1, a top support 1-2 and a telescopic mechanism 1-3 can effectively reduce the number of installation and disassembly of the temporary support. It only needs to adjust the telescopic mechanism 1-3 to control the contact and disengagement state of the limit rod 1-4 and the steel arch frame column 2, so as to achieve reliable support and separation control of the assembled steel arch frame column 2 during sliding, which not only ensures the stability of the arch frame assembly structure, but also does not affect the continuity of the subsequent sliding construction; the height-adjustable temporary support 1 provides reliable support and avoidance conditions for the assembly and sliding of the arch frame including the steel arch frame column 2, the aluminum alloy arch frame beam and the prestressed cable.

[0021] like Figure 2 As shown, the specific structure of the top bracket 1-2 is as follows: the top bracket 1-2 includes a frame 1-21 at the lower end and pillars 1-22 fixed centrally on both sides of the upper end of the frame 1-21, the frame 1-21 is fixed to the upper end of the bracket body 1-1, a cross bar 1-23 is fixedly connected between the two pillars 1-22, and the lower end of the telescopic mechanism 1-3 is fixed to the middle of the upper end surface of the cross bar 1-23; specifically, the upper end of the limit rod 1-4 is provided with a notch 1-5 adapted to the corresponding position of the steel arch frame column 2 toward the steel arch frame column 2, and the pillar 1-22 is provided with a reinforcing rod 1-24 fixedly connected to the lower end frame 1-21 and arranged away from the notch side; in the above structure, by processing the notch 1-5 adapted to the corresponding position of the steel arch frame column 2 on the limit rod 1-4, it is possible to ensure reliable support for the steel arch frame column 2, prevent side slip, and improve the stability and reliability of the supporting structure;

[0022] The telescopic mechanism 1-3 adopts a jack with a lifting capacity of ≥10t and a stroke of ≥10cm; the support body 1-1 is made of an ordinary pipe truss or a tower crane standard section.

[0023] The temporary support 1 includes a support body 1-1, a top support 1-2, a telescopic mechanism 1-3 and a limit rod 1-4; the position of the temporary support 1 is determined according to the center of gravity of the steel arch frame column 2 and the connection position of the steel arch frame column 2 and the aluminum alloy arch frame beam; the support body 1-1 is an ordinary pipe truss, and can also be a standard section of a tower crane, a temporary support main structure that can be used in a turnover manner; the top support 1-2 is a structure welded together with I-beams of specifications 200x200mm; the telescopic mechanism 1-3 is a CNC hydraulic jack, with specifications of a jack with a lifting capacity ≥10t and a stroke ≥10cm, on the cross bar 1-23 in the middle of the top support 1-2; the limit rod 1-4 is a 160x160mm square tube, with a notch 1-5 opened at the contact position with the steel arch frame column 2, the width of which is 5mm greater than the flange width of the steel arch frame column 2.

[0024] Construction process:

[0025] ① Install the temporary support 1 at the predetermined position, fix the support column feet firmly to prevent tipping, and complete the debugging of the telescopic mechanisms 1-3 on both sides to ensure the synchronization of extension;

[0026] ② Place the steel arch frame column 2 in a fixed position, preliminarily correct the verticality of the steel arch frame column 2, and when the crane is unhooked, extend the jacks corresponding to the steel arch frame columns 2 on both sides at the same time, and insert the flange of the steel arch frame column 2 into the notch 1-5 in the limit rod 1-4 to stabilize it;

[0027] ③ Hoist the aluminum alloy arch frame beam, connect it with the steel arch frame column 2, and install the prestressed cable;

[0028] ④ After the prestressed cables are installed, tension is performed to stabilize the structure;

[0029] ⑤ The telescopic mechanisms 1-3 on both sides are simultaneously retracted to unload the force, the limit rods 1-4 are retracted, and the steel arch columns 2 on both sides are not restricted;

[0030] ⑥The arch frame slides;

[0031] ⑦ Repeat the above steps until the cumulative slip of all structures is completed.

[0032] Under restricted conditions, the use of this temporary support device can effectively reduce the number of times temporary supports are installed and disassembled. It only requires synchronous control of extension and retraction through CNC hydraulic jacks, which not only ensures the stability of the arch assembly structure, but also does not affect the continuity of subsequent sliding construction. It improves construction efficiency and reduces construction costs. It has the advantages of simple construction and convenient operation, which can ensure construction quality, construction period and save construction costs and other beneficial effects.

[0033] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0034] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A temporary support device for sliding construction of a large-span prestressed arch structure, characterized in that: The invention comprises a temporary support (1) arranged on the inner side of a sliding track at a sliding starting position, the temporary support (1) comprising a support body (1-1), a top support (1-2) and a telescopic mechanism (1-3), the lower end of the support body (1-1) being fixed to an arch frame foundation, and the lower end of the top support (1-2) being fixed to an upper end of the support body (1-1), the lower end of the telescopic mechanism (1-3) being fixed to a middle portion of an upper end of the top support (1-2), a limiting rod (1-4) being arranged above the top support (1-2), and a telescopic end of the telescopic mechanism (1-3) being fixedly connected to a middle portion of a bottom surface of the limiting rod (1-4), and the limiting rod (1-4) being driven upward or downward by the telescopic movement of the telescopic mechanism (1-3), so as to achieve a tight support or downward separation with respect to a corresponding position of a steel arch frame column (2).

2. The temporary support device for sliding construction of a large-span prestressed arch frame structure according to claim 1 is characterized in that: The top bracket (1-2) comprises a frame (1-21) at the lower end and pillars (1-22) centrally fixed to both sides of the upper end of the frame (1-21); the frame (1-21) is fixed to the upper end of the bracket body (1-1); a cross bar (1-23) is fixedly connected between the two pillars (1-22); and the lower end of the telescopic mechanism (1-3) is fixed to the middle of the upper end surface of the cross bar (1-23).

3. The temporary support device for sliding construction of a large-span prestressed arch frame structure according to claim 2 is characterized in that: The upper end of the limit rod (1-4) is provided with a notch (1-5) facing the steel arch column (2) and adapted to the corresponding position of the steel arch column (2), and the support column (1-22) is provided with a reinforcing rod (1-24) fixedly connected to the lower end frame (1-21) and arranged away from the notch.

4. The temporary support device for sliding construction of a large-span prestressed arch structure according to any one of claims 1 to 3, characterized in that: The telescopic mechanism (1-3) adopts a jack with a lifting capacity of ≥10t and a stroke of ≥10cm.

5. The temporary support device for sliding construction of a large-span prestressed arch frame structure according to claim 4 is characterized in that: The support body (1-1) is made of common pipe trusses or tower crane standard sections.

Images