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Novel precisely adjustable large-span steel pipe truss unloading bracket and using method thereof

A steel pipe truss and large-span technology, applied in the processing of building materials, preparation of building components on site, manufacturing tools, etc., can solve the problems that hinder the development of jack unloading methods, require high operators, and the bottom is not completely fixed, etc., to achieve The effect of reliable welding connections, low operator requirements and few installation steps

Active Publication Date: 2019-03-22
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method meets the requirements of synchronous unloading precision, but it is mostly used for unloading at the bottom of the support frame at present. The operation difficulty increases, and the bottom is not completely fixed. If it is subjected to lateral interference and the stroke of the jack is inconsistent, it may cause lateral deformation and instability of the support frame. Safety low performance
Mechanical equipment can be used to fix the bottom jack, but this method will cause a substantial increase in construction costs. Some equipment is expensive, complicated to operate, and requires high requirements for operators. This also hinders the development of jack unloading methods in the construction of large-span steel structures. The main reason

Method used

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  • Novel precisely adjustable large-span steel pipe truss unloading bracket and using method thereof
  • Novel precisely adjustable large-span steel pipe truss unloading bracket and using method thereof
  • Novel precisely adjustable large-span steel pipe truss unloading bracket and using method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0046] see figure 1 and figure 2 , this embodiment discloses a new type of precisely adjustable large-span steel pipe truss unloading bracket, including an upper structure, a middle platform structure and a lower structure.

[0047] see Figure 5 , the middle platform structure includes two H-shaped steel platform beams 5 arranged in parallel, and a working platform 11 and a conversion platform 7 welded and fixed on the top surface of the H-shaped steel platform beams 5 . Several steel pipe beams 6 are arranged between the two H-shaped steel platform beams 5 arranged in parallel. The working platform 11 is a plate-like structure as a whole. A concave bayonet groove is provided on the upper surface of the working platform 11 . The lower surface of the working platform 11 is welded with H-shaped steel 18 at the position corresponding to the concave bayonet groove. The working platform 11 is arranged in the middle of the H-shaped steel platform beam 5 . The conversion plat...

Embodiment 2

[0052] This embodiment discloses a method for manufacturing the new type of large-span steel pipe truss unloading bracket described in Embodiment 1, including the following steps:

[0053] 1) Select the standard section at the top of the support frame and establish a center point in the middle, and set up the transition platform 14 and the welding ladder 13.

[0054] 2) Weld the H-shaped steel platform beam 5 on the upper surface of the tower crane standard section.

[0055] 3) Through plane positioning and center measurement, the conversion platform 7, the working platform 11 and the lap plate 8 are sequentially erected on the upper surface of the H-shaped steel platform beam 5.

[0056] 4) Weld the short support column 9 in the concave bayonet groove of the working platform 11, and lay the jack 10.

[0057] 5) Weld support column diagonal brace 4 and bolt support column 3.

Embodiment 3

[0059] This embodiment discloses a precise adjustment function of the new type of precisely adjustable large-span steel pipe truss unloading bracket described in Embodiment 1, to meet the needs of displacement monitoring during unloading of some engineering truss structures, including the following steps:

[0060] 1) The fine-tuning jack 10 slowly lifts the steel truss placed on the bracket, so that the steel truss just breaks away from the tile support 1.

[0061] 2) Turn the adjusting bolt ring 2 clockwise for one turn, and at this time, the bolt supporting column 3 drops by 1mm. Wherein, the internal thread density of the adjusting bolt ring 2 satisfies that the bolt supporting column 3 rises or falls by 1mm every turn. When unloading, screw the adjusting bolt ring 2 to check the deflection and deformation of the truss by the number of turns.

[0062] 3) Use a level to measure the vertical displacement between the truss and the supporting tile 1 and the elevation of the su...

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Abstract

The invention provides a novel precisely adjustable long-span steel pipe truss unloading bracket and a using method thereof. The unloading bracket includes an upper structure, a middle platform structure and a lower structure. The upper structure includes two bolt support columns, two short support columns and two jacks. The lower structure is tower crane standard sections. During working, a trussis placed on a tile support. The cylinder head of each jack abuts against the lower surface of the truss. The truss rises, the bolt support columns are controlled to enable the truss to deviate fromthe tile support, and then the jacks fall back to complete unloading. The bracket is simple to make, mostly welded, and can be produced at a construction site. The construction is fast and accurate. The number of the standard sections is determined according to the truss height to avoid idle resources. The resources are saved, and the cost is reduced.

Description

technical field [0001] The invention relates to the field of construction engineering, in particular to a large-span steel pipe truss unloading bracket. Background technique [0002] At present, large-span space steel structures are widely used due to their good mechanical properties. What is more complex is the realization of structural design and engineering construction. In the construction of long-span steel pipe trusses, a large number of support frames and operating platforms need to be erected. Some steel structures have large spans and high heights. Considering the effect of loads, the traditional sand discharge unloading method and the hot-melt stretching method have poor synchronous unloading accuracy and cannot meet the current construction requirements. Nowadays, jacks are mostly used to realize the unloading of large-span space steel structures. This method meets the requirements of synchronous unloading precision, but it is mostly used for unloading at the b...

Claims

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Application Information

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IPC IPC(8): E04G25/02E04G21/00B23K31/02
CPCB23K31/02E04G21/00E04G25/02
Inventor 姚刚李青泽孙宇佳王训杨阳
Owner CHONGQING UNIV
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