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Groove-shaped combined beam of embedded profile steel

A technology combining beams and troughs, applied in bridges, bridge materials, bridge construction, etc., can solve problems such as difficulty in applying to urban bridges and bridges in mountainous areas, difficulty in ensuring the welding quality of full-length fillet welds, and limitations in construction methods. The processing standard is efficient, the structural force is clear, and the effect of avoiding welding work

Active Publication Date: 2020-11-24
CHINA RAILWAY ERYUAN ENG GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the channel beam structure can be roughly divided into three categories. Among them, the prestressed concrete channel beam scheme often needs to configure more prestressed beams to resist the bending of the section. It is used in the small-span simply supported beam system, and the construction method is also limited to the prefabricated erection method and the full support method; the bridge deck of the steel channel beam structure adopts orthotropic slabs composed of longitudinal ribs, transverse ribs and cover plates, and the structure It is relatively complex, often requires overall prefabrication, and the size of the components is large, which is not convenient for block transportation, and it is difficult to apply to urban bridges and mountain bridges with limited transportation conditions; while the channel-shaped steel-concrete composite beam adopts an outsourced integral steel structure U beam, For the scheme of pouring concrete internally, if the outsourcing U-beam adopts the overall prefabrication scheme, the component size will be too large, which is not convenient for transportation; if the outsourcing U-beam is welded on site, it will be difficult to ensure the welding quality of the full-length fillet weld, which will affect the structural safety. The height of the building is still high, the length of the approach bridges on both sides is still long, and the overall cost is relatively high

Method used

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  • Groove-shaped combined beam of embedded profile steel
  • Groove-shaped combined beam of embedded profile steel
  • Groove-shaped combined beam of embedded profile steel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Such as figure 1 As shown, a channel-shaped combined beam of embedded steel according to the present invention includes two side plates 1 and a bottom plate, the bottom plate is connected between the two side plates 1, and the bottom plate includes reinforced concrete ( steel bars are not shown), the reinforced concrete is provided with several cross braces 2 arranged at intervals, the distance between two adjacent cross braces 2 is set according to design requirements, and the cross braces 2 are provided with reserved reinforcement holes, The cross brace 2 is a section steel component, and the bridge deck system is formed by pre-embedding section steel and reinforced concrete. The cross brace 2 is not limited to its cross-sectional form, including, for example, I-shaped, box-shaped, truss-shaped, π-shaped, T-shaped, and II-shaped. The two ends of the cross-brace 2 are respectively connected to the two side panels 1 .

[0036] Specifically, such as a span-trough combin...

Embodiment 2

[0039] Adopt the trough-shaped bonded beam of a kind of pre-embedded section steel described in the present invention, its structure is roughly the same as embodiment 1, and its difference is, as Figure 6 As shown, the inner side of the side plate 1 has a corbel 11, and the cross brace 2 is bolted to the corbel 11 of the side plate 1, and the bolt connection may be through bolts between the side plate 1 and the bottom plate of the cross brace 2 For connection, the side plate 1 and the end plate of the cross brace 2 may also be connected by bolts, or may be indirectly connected by using a gusset plate.

Embodiment 3

[0041] The groove-shaped combined beam of a kind of pre-embedded steel according to the present invention is roughly the same in structure as that of Embodiment 1, the difference is that the height of the side plate 1 gradually decreases from the mid-span to both ends, and the corresponding , the stiffener 12 is set obliquely, such as Figure 7 shown.

[0042] The height of the cross brace 2 can also be set to gradually decrease from the middle to both ends.

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Abstract

The invention discloses a groove-shaped combined beam of embedded profile steel. The groove-shaped combined beam comprises two side plates and a bottom plate. The bottom plate is connected between thetwo side plates. The bottom plate comprises reinforced concrete. A plurality of transverse supports arranged at intervals are arranged in the reinforced concrete, are provided with reserved profile steel bar holes, and are profile steel members. The two ends of the transverse supports are respectively connected with the two side plates. A bridge surface system is formed by the embedded profile steel and the steel bar concrete, so that a large amount of welding work can be avoided; because the members are dismantled into a plurality of pieces of profile steel, special -shaped plates are effectively avoided, the pre prefabrication difficulty is low, the structure stress is clearer, the design is facilitated, and transportation is convenient. The groove-shaped combined beam is suitable for urban bridges and mountainous bridges with limited transportation conditions. No pre-stressed beam needs to be configured. The cost is effectively reduced. The groove-shaped combined beam can be suitable for large-span simple supporting beams and multi-span continuous beam structures. Construction is simpler and more convenient.

Description

technical field [0001] The invention relates to the technical field of bridge engineering, in particular to a channel-shaped combined beam of pre-embedded section steel. Background technique [0002] The main girders of bridges with small and medium spans (with a span of less than 100m) mostly adopt box-shaped or T-shaped cross sections, and the overall building height is relatively large. With the rapid development of our country's transportation, there are more and more situations in which roads and urban bridges and railways are set up at three-dimensional intersections in actual projects. 1. The clearance requirements under the bridge are strict, and the usable building height of the bridge is very small. If the main girder of the bridge is box-shaped or T-shaped, the length of the approach bridges on both sides of the bank will be relatively large, especially if the longitudinal slope of the railway is generally relatively small, the approach bridges on both sides of t...

Claims

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Application Information

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IPC IPC(8): E01D19/00E01D19/12E01D101/26E01D101/30
CPCE01D19/00E01D19/125E01D2101/26E01D2101/30
Inventor 王应良陈星宇杨国静徐昕宇曾永平郑晓龙
Owner CHINA RAILWAY ERYUAN ENG GRP CO LTD