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Novel large-span inclined leg supporting type steel truss inverted arch bridge and construction method

A steel truss anti-arch bridge and oblique leg technology, applied in truss bridges, bridges, bridge forms, etc., can solve the problems of large stress on chords and bridge decks, easy cracks at rigid nodes, large overall deflection of the structure, etc., to achieve reduction Small main span, good landscape effect, and favorable traffic effect

Pending Publication Date: 2020-07-28
甘肃省交通规划勘察设计院股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the integrity of the steel truss arch bridge is good, the truss members are slender, the formwork is complex, the requirements for concrete pouring and lifting of the solid web section are high, and the bending parts and rigid nodes of the truss are prone to cracks
[0005] The traditional steel truss composite beam is a space structure composed of main trusses, horizontal longitudinal joints, horizontal joints, and bridge decks. Except that the fulcrums of large-span steel truss composite beams are set as variable-height space truss beams, the general trusses are designed at equal heights. Equal-height beams meet the aesthetic requirements, but because the mid-span generally has a large bending moment, the stress of the chord and the bridge deck is large, and the overall deflection of the structure is also large, it is necessary to use a variable-height main truss according to the bending moment envelope diagram. Improve the overall performance of the structure

Method used

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  • Novel large-span inclined leg supporting type steel truss inverted arch bridge and construction method
  • Novel large-span inclined leg supporting type steel truss inverted arch bridge and construction method
  • Novel large-span inclined leg supporting type steel truss inverted arch bridge and construction method

Examples

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Embodiment 1

[0035] The present invention provides a new type of long-span diagonal-leg braced steel truss reverse arch bridge and its construction method. This embodiment includes a concrete box girder 1, diagonal-leg braces 2, bridge deck 3, upper chord 4, main arch ring 5, web bars 6. The upper chord of the beam 7, the lower chord of the beam 8, the web of the beam 9, the gusset plate 10 of the web and the lower parallel 11, such as Figure 1-5 shown.

[0036] The novel large-span diagonal-leg braced steel truss inverted arch bridge described in the present invention is generally suitable for V-shaped valleys with good geological conditions, and the clearance under the bridge is sufficient without affecting navigation. The new large-span diagonal-leg braced steel truss reverse-arch bridge described in this example has a total length of 150m and a steel truss reverse-arch structure with a main span of 75m. Both sides of the main arch are concrete box girders integrated with diagonal leg ...

Embodiment 2

[0053] The present invention provides a new type of long-span diagonal-leg braced steel truss reverse arch bridge and its construction method. On the basis of Embodiment 1, this embodiment changes the arrangement of the web members of the steel truss main arch to a vertical type, and changes the diagonal-leg brace The cross-section form is slab type, including concrete box girder 1, diagonal leg brace 2, bridge deck 3, upper chord 4, main arch ring 5, web 6, beam upper chord 7, beam lower chord 8, beam web 9, web Rod gusset plate 10 and lower parallel connection 11, such as Figure 6~7 shown.

[0054] The novel large-span diagonal-leg braced steel truss inverted arch bridge described in the present invention is generally suitable for V-shaped valleys with good geological conditions, and the clearance under the bridge is sufficient without affecting navigation. The new large-span diagonal-leg braced steel truss reverse-arch bridge described in this example has a total length o...

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Abstract

The invention relates to a novel large-span inclined leg supporting type steel truss inverted arch bridge and a construction method. The inverted arch bridge comprises a diagonal bracing system, a steel truss inverted arch system and a bridge deck slab, the steel truss inverted arch system is installed on the diagonal bracing system and comprises steel truss main arch pieces and steel beams, the steel truss main arch pieces are connected through the steel beams, and the bridge deck slab is installed on the steel truss inverted arch system. According to the novel large-span inclined leg supporting type steel truss inverted arch bridge, a steel structure and a concrete structure are perfectly combined; the main bridge span structure is a steel truss inverted arch structure system, is simpleand novel in appearance, good in structural performance and smooth in bridge floor view, is a novel bridge with both structural stress requirements and landscape effect under certain geological and topographic conditions, has antisymmetric beauty, and breaks through the restriction of the conventional bridge.

Description

technical field [0001] The invention belongs to the technical field of bridge engineering, and in particular relates to a novel large-span diagonal-leg braced steel truss inverted arch bridge and a construction method. Background technique [0002] The traditional inverted arch top-supported suspension bridge is mainly composed of bridge deck, main girder, column and main cable, and the main cable is the main load-bearing component. Due to the structural characteristics and stability requirements, it is suitable for mountain canyons with small spans or rivers with large water drop and low navigation requirements, and has high terrain requirements. The anti-arch overhang suspension bridge has low overall stiffness and poor wind resistance stability, so it cannot be applied to larger spans and has limitations. [0003] The traditional oblique-leg rigid-frame bridge adopts the type of consolidation of oblique legs and main girder to support the bridge structure. The main girde...

Claims

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Application Information

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IPC IPC(8): E01D6/02E01D21/00
CPCE01D6/02E01D21/00
Inventor 胡焱文王龙飞张春明刘旺宗景燕康建龙
Owner 甘肃省交通规划勘察设计院股份有限公司