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Steel and bamboo combined box girder

A combination box and steel bamboo technology, applied in the direction of bridges, bridge parts, bridge construction, etc., can solve the problems of slow growth of forest resources, seldom application of wood structures, scarcity of wood resources, etc., and achieve good physical and mechanical properties and processing performance. The effect of reducing the amount of structural engineering and improving economic indicators

Inactive Publication Date: 2015-10-07
JIANGSU DEFENG CONSTR GRP +4
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are many joints of corrugated steel webs, and its connection structure is relatively complicated, which makes it difficult to install formwork and brackets during the pouring process of the bottom slab and roof, and the construction is difficult; and the concrete bottom slab is prone to tensile cracks, and its durability is relatively low. Difference
[0003]Reinforced concrete is the main material of the top and bottom plates of the existing corrugated steel web composite box girder. Composite box girders, but the joints between steel webs and wooden boards still use cast-in-place concrete, which cannot solve the problem of difficult formwork construction; and my country's timber resources are scarce, and the per capita forest area is only 0.13 square hectares, which is less than 1 / 2 of the world's average level. 4. It ranks 134th in the world. Statistics show that the main problems of my country's forests are: insufficient total resources; low forest quality and uneven distribution; slow growth of forest resources, and now domestic wooden structures are rarely used

Method used

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  • Steel and bamboo combined box girder
  • Steel and bamboo combined box girder
  • Steel and bamboo combined box girder

Examples

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Embodiment Construction

[0031] Example: refer to Figures 1 to 4 As shown, a steel-bamboo composite box girder includes a top plate 1, and two bottom plates 2 located below the top plate 1, each bottom plate 2 and the top plate 1 are connected by two symmetrically arranged corrugated steel webs 3, and the top plate 1. It is made of several single-piece bamboo plywood boards 4 arranged side by side with the same height and whose length is set along the driving direction of the bridge through prestressed steel bars 5. The bamboo plywood 4 is compressed by the prestressed steel bar 5, and the corrugated steel web 3 is connected with the top plate 1 and the bottom plate 2 by the shear steel sheet 6.

[0032] In the present invention, installation holes for prestressed steel bars 5 to pass are arranged in the top plate 1 and the bottom plate 2. The prestressed steel bars 5 are horizontally arranged at the same height and both ends are fixed with pier head anchors 7. The prestressed steel bars 5 are ma...

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Abstract

The invention discloses a steel and bamboo combined box girder. The steel and bamboo combined box girder comprises a top plate and at least one bottom plate, wherein the bottom plate is arranged under the top plate; each bottom plate is connected with the top plate through two symmetrically arranged corrugated steel webs; the top plate is obtained by pressing a plurality of single bamboo veneers through pre-stressed steel bars, wherein the single bamboo veneers have equal heights and are arranged in parallel with lengths in a bridge traffic direction; and meanwhile, the corrugated steel webs are connected with the top plate and the bottom plates through shear steel sheets. The steel and bamboo combined box girder disclosed by the invention is advantaged in that anti-buckling and anti-crack capacities of the corrugated steel webs and the tensile capacities of the bamboo veneers are maximized; the structural integrity is good, the box girder is not prone to crack; the field construction is easy; the period is short; the material is environment-friendly and durable; and requirements of various different-span bridges can be satisfied.

Description

technical field [0001] The invention belongs to the field of bridge structures, in particular to a steel-bamboo composite box girder. Background technique [0002] The corrugated steel web composite box bridge is a new type of bridge that appeared in the 1980s. It is a new steel-concrete composite structure that replaces the concrete web of the prestressed concrete box girder with corrugated steel plates. Compared with the conventional structure, its advantage lies in its light weight, which can reduce the engineering quantity of the substructure, thereby reducing the total cost of the project; it avoids the problem of web cracking, and the structure has good durability. However, there are many joints of corrugated steel webs, and its connection structure is relatively complicated, which makes it difficult to install formwork and brackets during the pouring process of the bottom slab and roof, and the construction is difficult; and the concrete bottom slab is prone to ten...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D19/00E01D2/04
Inventor 张云法江飞飞马剑
Owner JIANGSU DEFENG CONSTR GRP
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