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Fabricated triangular truss beam steel structure support and combined keys thereof

A triangular truss and combined key technology, which is applied in basic structure engineering, excavation, construction, etc., can solve problems such as unreasonable force, poor integrity, and small layout spacing, so as to reduce project cost, achieve good project implementation effect, increase Effect of support spacing

Inactive Publication Date: 2019-07-05
王琪
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide a prefabricated triangular truss beam steel structure support and its combination by overcoming the shortcomings of the existing prefabricated steel support such as small layout spacing, poor integrity, unreasonable force, and large amount of steel used. key

Method used

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  • Fabricated triangular truss beam steel structure support and combined keys thereof
  • Fabricated triangular truss beam steel structure support and combined keys thereof
  • Fabricated triangular truss beam steel structure support and combined keys thereof

Examples

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Effect test

example 1

[0043] Example 1: A group of isosceles triangular truss beam support structure

[0044] like Figure 7 As shown, this support structure is a triangular truss beam steel structure assembled by six equilateral combination keys 31 and two small pentagon combination keys 32, horizontal beams 81, and inclined beams 82. The horizontal beam 81 of this support structure can be a shaped steel beam 7 or a reinforced concrete beam 85 . When it is a reinforced concrete beam 85 or a combination of a shaped steel beam 7 and a reinforced concrete beam 85, the length of the horizontal beam is relatively large, which can realize the requirement of a large span.

[0045] When a large supporting force needs to be provided and multiple inclined beams need to be arranged, the combined keys at the corners need to be replaced with small triangular combined keys 34 or large triangular combined keys 35, and large pentagonal combined keys 33, horizontal beams 81 and inclined beams 82 increases the ro...

example 2

[0047] Example 2: Triangular truss beam support structure with vertical beams

[0048] like Figure 8 As shown, this support structure is a triangular truss beam steel structure made of small triangular combination keys 34 and large pentagonal combination keys 33 and horizontal beams 81, vertical beams 83 and inclined beams 82.

[0049]On the outer side of the combined key at the top of the triangular truss beam, set up a set of prestressed loading assembly devices, such as Image 6 shown. Prestressing is applied to the splayed beam 82 . This structure constrains the midpoint of the horizontal beam 81 through the vertical beam 83 , effectively reducing the amount of bending deformation of the horizontal beam 81 .

example 3

[0050] Example 3: Two sets of isosceles triangular truss beam support structure

[0051] like Figure 9 As shown, this support structure is a triangular truss beam steel structure assembled by a large triangular combination key 35, a small triangular combination key 34, a large pentagon 33, a small pentagon combination key 32, a horizontal beam 81, and an oblique beam 83;

[0052] In the outer side of the large triangular combination key 35 and in the vertical beam 83, a group of prestressed loading assembly devices are set, such as Image 6 shown. Prestressing is applied to the two groups of splayed beams 82 respectively.

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Abstract

The invention discloses a fabricated triangular truss beam steel structure support and combined keys thereof. A triangular truss beam is of an isosceles triangle structure formed by horizontal beams,splay inclined beams and the combined keys in an fabricated mode, wherein the connecting faces between the axes of the horizontal beams and the combined keys as well as between the axes of vertical beams and the combined keys as well as between the axes of the inclined beams and the combined keys are mutually perpendicular, and the horizontal beams, the vertical beams, the inclined beams and the combined keys are fabricated and connected to a whole through bolts. The combined keys are divided into five types, namely, the equilateral hexagon combined key, the small pentagon combined key, the large pentagon combined key, the small triangular combined key and the large triangular combined key; pre-stressed steel strand tensioning devices are arranged between the combined keys located at the two ends of the horizontal beams at the bottom, steel strands penetrate through semi-circular holes reserved in stiffened rib plates in the combined keys, and the steel strands are locked at the ends of the combined keys through anchoring devices; and triangular truss beams can be composited up and down to be applied, and the compositing flanges of the steel beams are connected into a whole throughbolts. Through a supporting structure, the supporting span is increased, the construction cost is lowered, the construction period is shortened, and the important economic and social value is achieved.

Description

technical field [0001] The invention relates to the technical field of civil engineering, in particular to a structural form of an assembled steel support and a design method for key components thereof. Background technique [0002] In foundation pit engineering, the prefabricated steel structure support has the advantages of convenient installation and recyclability, and has achieved a wide range of promotion and application. However, the steel supports commonly used at present mainly support the foundation pit by densely arranging the brace beams and angle brace beams, which brings a lot of trouble to the excavation and transportation of the foundation pit and the subsequent underground structure construction. [0003] For example, the existing subway station foundation pit or open-cut tunnel foundation pit adopts steel pipe braces and angle braces, and the support center distance is only 3m, which seriously affects the speed of excavating soil and the construction period....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D17/04
CPCE02D17/04
Inventor 刘斐然张越
Owner 王琪