Box type baseboard prestress concrete variable cross-section box girder bridge and construction method thereof

A concrete and variable cross-section technology, applied in bridges, bridge materials, bridge construction, etc., can solve problems such as increased self-weight, web 2 main tensile stress cracks, mid-span floor 1 shear cracks, etc., to achieve simplified structural design and The effect of construction, shrinkage, creep, deflection, and shear resistance enhancement
CN1974931AInactive Publication Date: 2007-06-06CHONGQING JIAOTONG UNIVERSITY +1
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
CHONGQING JIAOTONG UNIVERSITY
Publication Date
2007-06-06
Estimated Expiration
Not applicable · inactive patent

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Abstract

The present invention belongs to the field of civil engineering bridge technology, and discloses a box-type baseplate prestressed concrete non-uniform box beam bridge. It is characterized by that the rectangular solid baseplate of box beam bridge is remade into the form of box. Said invention also provides its concrete structure characteristics. Its structure includes baseplate box top plate, horizontal anchor plate and box beam, they can be in-situ case together, and formed into one whole body. Said bridge has high structure whole body rigidity, small deflection and strong resistance to shear, and its crossing capacity also can be greatly raised.
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Description

technical field

[0001] The invention belongs to the technical field of civil engineering bridges, and in particular relates to a prestressed concrete variable-section box girder bridge with a box-shaped floor and a construction method thereof. Background technique

[0002] Long-span prestressed concrete variable-section box-girder bridges are widely used bridge types at present, and continuous beams and continuous rigid-frame bridges are the most common, and they are often constructed by hanging basket cantilever casting method. As shown in Figure 1, it is a schematic structural diagram of a continuous rigid frame bridge. The main girder between the piers 6 and its bottom plate 1 are arched, and the height of the girder at mid-span is smaller than the height of the fulcrum at the 6 piers.

[0003] The prior art long-span prestressed concrete variable-section box girder bridges have the following problems of unreasonable structure and stress. The larger the span, the more ser...

Claims

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