CN205531392U - Stop device that topples is prevented in steel space frame jacking - Google Patents

Abstract

This utility model discloses a steel space frame lifting anti-overturning limiting device, including a steel column, a lower chord of the steel space frame disposed outside the steel column, and four bolt ball joints disposed on the lower chord of the steel space frame at the intersection of its members. An upper constraint frame is disposed inside the lower chord of the steel space frame, located outside the steel column and engaged with it. An external constraint frame is connected to the lower end of the lower chord of the steel space frame via a support column, and a lower constraint frame is disposed inside the external constraint frame, located outside the steel column and engaged with it. This utility model utilizes an existing steel space frame structure for modification, increasing the lateral constraint of the steel space frame and solving the problem of overturning during the lifting process of the steel space frame.

Description

A lifting anti-overturning limit device for steel grid frame

technical field

The utility model relates to overall jacking, in particular to an overall jacking anti-overturning limiting device for a steel network frame.

Background technique

Since the Beijing Olympic Games in 2008, with the improvement of people's living standards, the demand for the construction of large-scale venues has increased. Steel grids have gained more and more attention due to their advantages such as large span, good space, reasonable force, safety and beauty. Wide range of applications. In the process of on-site construction, in order to minimize high-altitude operations, many steel grid frames adopt the construction method of overall jacking after ground assembly, which not only reduces manpower and material resources, but also avoids certain construction risks of high-altitude operations. However, due to the complex structure of the steel grid structure, the jacking device only provides vertical support during the jacking process, and does not provide lateral restraint, which is prone to the risk of overturning. In recent years, many steel grid structure jacking construction safety accidents have occurred. Most of them come from the failure to do a good job in anti-overturning measures, which has brought blood lessons to people.

Utility model content

The purpose of this utility model is to overcome the deficiencies in the prior art, to provide a steel grid structure that utilizes the existing structure and increases the lateral restraint of the steel grid frame, which can ensure that no overturning accidents occur during the jacking process of the steel grid frame, and is safe and reliable. , easy-to-operate steel grid frame jacking anti-overturning limit device.

In order to solve the above technical problems, the utility model provides a steel grid frame jacking anti-overturning limit device, including a steel column, a steel grid frame lower chord arranged outside the steel column, and a rod member located on the steel grid lower chord The four bolt ball nodes at the intersection, the lower chord of the steel grid frame is provided with an upper constraining frame body outside the steel column and engaged with the steel column; the lower end of the lower chord of the steel grid frame is connected by a support pole There is an external constraint frame body, and a lower layer constraint frame body located outside the steel column and engaged with the steel column is arranged in the external constraint frame body.

The top end of the support pole is arranged on the bolt ball node.

The beneficial effect of the utility model is that: the utility model adopts adding support poles, upper constraining frames, lower constraining frames, and external constraining frames at the lower chord of the network frame, and makes full use of the existing structure to form an anti-overturning limiting device. Among them, the upper and lower constraining frames have the same shape, and are composed of two horizontal bars and two vertical bars. The existing structure - the steel column is stuck inside, and the steel column's high rigidity is used to provide horizontal restraint. At the same time, a support pole is placed at the lower part of the bolt ball joint to connect the large external restraint frames, provide support for the lower restraint small frames, and increase the overall rigidity of the restraint device. Due to the existence of the steel column, the steel grid frame connected with the anti-overturning device as a whole will be restricted in the plane perpendicular to the steel column, allowing the grid frame to be lifted upwards, and at the same time restricting the steel grid frame during the jacking process. Horizontal displacement to avoid overturning during jacking. In addition, the utility model is suitable for overall jacking construction of steel structures such as housing construction, large-scale public buildings, and municipal traffic engineering.

Description of drawings

Figure 1: Structural schematic diagram of the utility model.

Notes on drawings: 1. Steel column; 2. Bottom chord of steel grid; 3. Bolt ball joint; 4. Support pole; 5. Upper restraint frame; 6. Lower restraint frame; 7. External restraint frame.

detailed description

Below in conjunction with accompanying drawing, the utility model is further described.

As shown in accompanying drawing 1, a kind of steel grid frame lifting anti-overturning limit device comprises a steel column 1, a steel grid frame lower chord 2 arranged outside the steel column 1, and a steel grid lower chord 2 arranged on its pole Four bolt ball nodes 3 at the intersection of parts, the lower chord 2 of the steel grid frame is provided with an upper restraint frame body 5 that is located outside the steel column 1 and is engaged with the steel column 1; the lower chord of the steel grid frame 2 The lower end is provided with an external constraint frame body 7, and the external constraint frame body 7 is connected with the lower chord 2 of the steel grid frame through the support pole 4 set at the bolt ball node 3 at the top end, and the external constraint frame body 7 is set inside There is a lower constraining frame body 6 located outside the steel column 1 and engaged with the steel column 1, wherein the external constraining frame body 7 provides support for the lower constraining frame body 6, and the utility model device is added the overall stiffness.

In this embodiment, the upper constraining frame body 5 and the lower constraining frame body 6 have the same shape, and are composed of two horizontal bars and two vertical bars. The diameters of the steel columns 1 match each other, and the steel column 1 is clamped in the square frame, and the steel column 1 is used to provide a horizontal constraint force due to its high rigidity.

Use the overturning limit device of the utility model to lift the steel grid: (1) vertically project the three-dimensional coordinates of the grid to the ground, and assemble the steel grid on the ground; (2) place the steel columns of the existing structure after the ground assembly is completed 1. Place the jacking device and raise the steel grid frame by 1.5m to provide an operating space for installing the anti-overturning limit device; (3) Start installing the new components of the anti-overturning limit device, first at the bottom chord bolt ball node 3 Install the support pole 4 at the bottom; (4) install the external constraint frame 7; (5) install the lower constraint frame 6 around the steel column 1; (6) install the upper constraint frame 5 around the steel column 1; (7 ) continue to lift to the design elevation, due to the existence of the anti-overturning device, the steel grid frame is allowed to rise vertically, while limiting the horizontal displacement; On the steel column 1, the jacking is completed.

Claims (2)

1. A jacking and anti-overturning limit device for a steel grid frame, comprising a steel column, the lower chord of the steel grid frame arranged outside the steel column, and four bolt ball nodes arranged on the lower chord of the steel grid frame at the intersection of its rods , characterized in that, the lower chord of the steel grid frame is provided with an upper constraining frame body located outside the steel column and engaged with the steel column; the lower end of the lower chord of the steel grid frame is connected with an external restraining frame through a supporting pole body, a lower restraint frame body located outside the steel column and engaged with the steel column is arranged in the external restraint frame. 2. The jacking anti-overturning limit device for steel grid frame according to claim 1, characterized in that, the top end of the support pole is arranged on the bolt ball node.