CN212249325U - Jack unloading support device - Google Patents

Abstract

The utility model relates to a jack unloading support device, comprising a support and a jack. The jack is fixedly connected to the support, the lower end of the support is fixedly connected to the bottom plate, the upper end of the jack is provided with a joist, the left and right sides of the support are fixedly connected to a vertical column, and the lower end of the vertical column Fixed connection with the bottom plate; there is an unloading pad on the top surface of the upper end of the column, the top surface of the unloading pad is the same height as the top of the jack, the unloading pad is made of several steel plates stacked, and the top steel plate and the jack are connected to the bottom surface of the joist together; There is a through hole at the end, and a positioning rod is installed in the through hole; the lower end of the positioning rod is fixedly connected with the column, and the upper end is equipped with a compression nut. This device is used for supporting and unloading of large components, and height correction. The operation is simple and can be used repeatedly.

Description

Jack unloading support device

technical field

The utility model belongs to the field of construction engineering, in particular to a jack unloading support device.

Background technique

In today's society, as people's requirements for building functions are getting higher and higher, in order to meet the needs of building appearance and function, it is necessary to design the building into a large space, large span, and large cantilever structure. Because the entire structure has many deformation joints, settlement joints , it is necessary to install and unload every three trusses according to the deformation joint; and before the structural installation is completed or the design requirements are met, a temporary support and unloading device needs to be used as a temporary support during installation, and the unloading and dismantling of the support device after the construction of the structure is completed; The most commonly used technology in construction is the cutting technology of the support tire frame. Using this method, in the process of production, installation and dismantling, the workload is large, which is not conducive to saving materials, and the operation is dangerous.

There are also hydraulic jacks and computer synchronous control systems for unloading. Although this method is relatively safe, it has high usage costs and increases project costs, and is not suitable for small-scale truss unloading. Traditional cutting and unloading have poor safety. Traditional construction requires a lot of technical measures, complicated operation, a large amount of oxygen and acetylene energy consumption, and high cost.

SUMMARY OF THE INVENTION

The technical problem to be solved by the utility model is the problems of poor construction safety and high construction cost in the prior art for the installation and unloading of the large-span cantilever member.

For the defects of construction in the prior art, the solution provided by the present invention is:

A jack unloading support device includes a support and a jack, the jack is fixed on the support, the lower end of the support is fixed with the bottom plate, the upper end of the jack is provided with a joist, the left and right sides of the support are fixed with a column, and the lower end of the column is fixed with the bottom plate ;The top surface of the upper end of the column is provided with an unloading pad, the top surface of the unloading pad is the same height as the top of the jack, the unloading pad is formed by stacking several steel plates, and the top steel plate and the jack are connected to the bottom surface of the joist together; the two ends of the joist are provided with through holes , the positioning rod is installed in the through hole; the lower end of the positioning rod is fixedly connected with the column, and the upper end is installed with a compression nut.

The device is used for supporting and unloading large components, height correction, stable structure, high safety, low cost, simple operation, and can be used repeatedly.

The jack is a manual screw jack.

The front and rear sides of the support are provided with inclined supports, and the lower ends of the inclined supports are fixedly connected with the bottom plate.

The column is an H-shaped steel column, the top of the H-shaped steel column is fixedly connected to the column top plate, and the unloading backing plate is provided on the column top plate.

The joist is provided with a joist positioning plate, and the joist positioning plate is provided with a groove matching the shape of the component.

Description of drawings

Fig. 1 is the structural representation of the present invention;

Figure 2 is the first operating condition of the unloading support device;

Figure 3 shows the second operating condition of the unloading support device;

Figure 4 shows the third operating condition of the unloading support device;

In the figure: joist 1; jack 2; support 3; support top plate 301; bottom plate 4; column 5; column top plate 501; unloading backing plate 6; positioning rod 7; joist positioning plate 8; ;Press the nut 11.

Detailed ways

The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are a part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

As shown in Figures 1 to 4, a jack unloading support device includes a support 3 and a jack 2, the jack 2 is fixed on the support 3, the lower end of the support 3 is fixed with the bottom plate 4, and the upper end of the jack 2 is provided with a joist 1. The left and right sides of the support 3 are fixed to the column 5, and the lower end of the column 5 is fixed to the bottom plate 4; the top surface of the upper end of the column 5 is provided with an unloading pad 6, and the unloading pad 6 is formed by stacking several steel plates. The surface is the same height as the top of the jack 2; the two ends of the joist 1 are provided with through holes, and the positioning rods 7 are installed in the through holes;

The support 3 is H-shaped steel, and the top of the support 3 is fixedly connected to the support top plate 301 in order to facilitate the installation of the jack. The jack 2 of the present invention is a manual screw jack, which is placed on the upper part of the support top plate 301 .

Similarly, the columns 5 on both sides of the support can also be made of H-shaped steel, the top of which is fixed to the column top plate 501, the unloading backing plate 6 is arranged on the column top plate 501, and the steel plates of the unloading backing plate 6 are stacked on the column top plate 501.

The upright column 5 is welded integrally with the support 3 .

The front and rear sides of the support 3 are provided with inclined supports 9, and the inclined supports 9 are made of channel steel, the lower end of the channel steel is welded with the bottom plate 4, and the upper support 3 is welded.

In order to ensure the stability of the component during the component supporting process, a joist positioning plate 8 is provided on the joist 1 , and the joist positioning plate 8 is provided with a groove matching the shape of the component 10 . If the steel pipe truss needs to be constructed, the slot is an arc slot; if the H-shaped steel truss needs to be constructed, the slot is a square slot.

The positioning rod 7 of the present invention is a positioning structure to prevent the joist 1 from shifting, and is essentially a guide rod when the height of the joist is adjusted. It can move smoothly, and the diameter of the through holes at both ends of the joist 1 is 1-2 mm larger than the diameter of the positioning rod 7 . After the position of the joist 1 is determined, it is fixed by the compression nut 11 .

The unloading backing plate 6 of the present invention is a general term for several sheets of steel plates stacked together. The jack 2 of the present invention is supported on the midpoint of the joist 1 , and the unloading backing plate 6 supports both sides of the joist 1 , so as to keep the support of the joist 1 stably. The size of each layer of steel plates of the unloading backing plate 6 is 200mm long * 100mm wide * 8-20mm thick, and the number can be adjusted at any time according to the support height during operation.

The joist 1 of the present invention adopts two channel steels welded into a box shape, and a stiffening plate can be arranged inside. The joists 1 are arranged on the unloading pads 6 on the two sides of the uprights 5 and the jacks 2. The joists 1 can be connected to the jacks 2, or they can be placed on the top of the jacks without designing connecting structures and connecting components.

This device is used for support and unloading of large components, height correction, stable structure, safe use, low cost, easy operation, and can be recycled.

The construction method for truss installation and positioning using the above-mentioned jack unloading support device:

Step 1: Install an unloading support device at each unloading point position under the truss end member of the unloading unit;

Step 2: Determine the installation elevation of the joist according to the deflection value of the unloaded structural truss provided by the design;

Step 3: According to the position of the joist positioning plate, adjust the height of the jack and the height of the backing plate on the columns on both sides. When the joist positioning plate reaches the design level, tighten the compression nuts on the positioning rods on both sides to fix the joists. ;

Step 4: The hoisting trusses are respectively placed on each unloading support device, and the positioning of the unloading support device is fine-tuned again until the truss reaches the design elevation, and then the truss structure is installed;

Step 5: After the construction of the truss structure is completed, start the unloading of the truss. The unloading will be carried out step by step and at equal intervals. The three jacks will be lifted up slightly at the same time, and a layer of backing plate will be extracted at the same time, and then the three jacks will be slowly lowered synchronously. The fallback displacement is 10mm, and the backing plate is removed for each unloading stroke of the jack. After falling back, stop for 2 minutes to check the condition of the jack, the support and the truss, and strictly control the synchronization of the jack during the fallback process;

Step 6: When the truss is in a free state, stop unloading, measure and record the dimensions of the end of the truss.

The present utility model is described in detail below in conjunction with specific construction examples, and the specific operation process of the present embodiment is as follows:

1) Determine the installation elevation of the unloading support frame according to the unloading deflection value of the structural truss provided by the design, and measure and control the joist positioning plate through the total station.

2) According to the position of the joist positioning plate, adjust the number of layers of backing plates on the two uprights of the support device and the lifting length of the screw jack. When the joist positioning plate reaches the design elevation, tighten the compression nut to fix the joist. As shown in Figure 2.

3) Repeat the above two steps to complete the installation and positioning of other truss unloading support devices.

4) Set up an unloading team, and unloading is under the unified command of the commander-in-chief, using walkie-talkies. The on-site operation and management personnel are divided by area. Each unloading point is set up with 2 or 3 operators. Each manager is responsible for one unloading point.

5) Draw a downward movement scale line on the jack, the scale line is 10mm per grid, and the jack is slowly lowered, and the displacement is 10mm each time. Stop for 2 minutes after falling back, and check the condition of the jack, the support and the truss. Every time the jack is unloaded for one stroke (the first stroke of 10mm), remove one layer of the backing plate, and adjust as shown in Figure 3. During the whole unloading process, if there is an accident with the jack, the temporary pads on both sides can support the lower bracket of the truss and play a protective role.

6) As shown in Figure 4, unload until the truss is in a free state, then stop unloading. Measure and record the dimensions of the end of the truss. During this process, pay attention to observe the changes of the jack and the truss. If any abnormality occurs, it should be stopped immediately.

Finally: Repeat the previous implementation process until the construction of the structure is completed.

The utility model is suitable for the installation and unloading construction of the large space cantilever steel pipe truss structure, and solves the problem of poor safety in the traditional cutting and unloading. The method of the utility model has high unloading construction safety, less construction investment, and the supporting device can be used repeatedly for many times. More important The most important thing is to reduce the investment in technical measures during construction, save oxygen, acetylene energy, and save costs.

Claims (5)

1. A jack unloading support device, comprising a support and a jack, the jack is fixed on the support, the lower end of the support is fixed with the bottom plate, the upper end of the jack is provided with a joist, and it is characterized in that: The left and right sides of the support are fixed to the column, and the lower end of the column is fixed to the bottom plate; the top surface of the upper end of the column is provided with an unloading pad, and the top surface of the unloading pad is the same height as the top of the jack. The jack is connected to the bottom surface of the joist together; the two ends of the joist are provided with through holes, and the positioning rods are installed in the through holes; 2. The jack unloading support device according to claim 1, wherein the jack is a manual screw jack. 3 . The jack unloading support device according to claim 1 , wherein the front and rear sides of the support are provided with inclined supports, and the lower ends of the inclined supports are fixedly connected to the bottom plate. 4 . 4. The jack unloading support device according to claim 1, wherein the column is an H-shaped steel column, the top of the H-shaped steel column is fixed to the column top plate, and the unloading pad is provided on the column top plate. 5 . The jack unloading support device according to claim 1 , wherein the joist positioning plate is provided with a joist positioning plate, and the joist positioning plate is provided with a groove matching the shape of the component. 6 .

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