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Wide-angle Y-shaped pier column construction method

A construction method and large-angle technology, applied in the direction of bridge parts, erection/assembly of bridges, bridge materials, etc., to achieve the effect of ensuring structural safety and construction safety, reducing installation and material costs, and saving costs

Active Publication Date: 2015-07-01
CHINA CONSTR SIXTH ENG DIV CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] What the present invention aims to solve is the above-mentioned multiple difficult technical problems in the construction of the existing large-angle Y-shaped pier column, and provides a construction method for the large-angle Y-shaped pier column, which can ensure the concrete of the coupling part of the "V"-shaped two oblique legs. The tensile stress is always within the allowable range of the design, and the structural safety and construction safety are ensured

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Embodiment Construction

[0040] In order to further understand the invention content, characteristics and effects of the present invention, the following examples are given, and detailed descriptions are as follows in conjunction with the accompanying drawings:

[0041] The invention provides a construction method of a large-angle Y-shaped pier column. The construction method is mainly applicable to a Y-shaped pier column whose included angle between the legs of the "V"-shaped two oblique limbs of the pier column 10 pier body is greater than 90°. This large-angle Y-shaped pier column cannot be self-contained before the prestressed tension of the upper tie beam 5, and must rely on strong external support.

[0042] The Y-shaped pier column can be regarded as including a straight line section, a coupling section transitioning from a straight line section to a slanted leg section, a slanted leg section, and a tie beam 5 according to different cross-sectional shapes from bottom to top. The Y-shaped pier co...

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Abstract

The invention discloses a wide-angle Y-shaped pier column construction method; the construction method comprises the steps: pouring a Y-shaped pier column at six stages from a layer I to a layer VI; mounting scaffolds on a support platform to pour concrete on the layers I and II of the pier column; installing a corbel, a formed steel frame and a distribution beam; anchoring first long stay cables and short stay cables; pouring concrete on the layer III of the pier column; cutting the first long stay cables and dismounting formworks of the III-layer concrete; anchoring second long stay cables; pouring concrete on the layers IV and V of the pier column; stretching horizontal tensile steel strands, dismounting the upper structural part of the formed steel frame and the second long stay cables; mounting the scaffolds at the lower structural part of the formed steel frame to pour concrete on the layer VI and gradually stretching the horizontal tensile steel brands to be 100% during pouring. By adopting segmented construction measures and a stay support system, the technical problem in the traditional construction is solved effectively, the structural and construction safety is ensured and the cost of the operating platform is reduced remarkably.

Description

technical field [0001] The invention relates to the field of bridge construction, in particular to a construction method for a bridge Y-shaped pier column. Background technique [0002] Over the past ten years, some prestressed concrete Y-supported bridges have appeared at home and abroad, including Y-supported continuous girder bridges and continuous rigid frame bridges. Compared with straight-leg rigid-frame bridges, under the action of V-piers of prestressed concrete Y-shaped continuous rigid-frame bridges, the span of the main girder can be significantly shortened, and the peak value of the negative bending moment at the support shoulder is also reduced, so that the structure It becomes light and slender, which is beneficial to choose the form of variable cross-section box girder, and the shape is more beautiful and generous, such as figure 1 shown. [0003] Among them, the angle between the "V"-shaped two slanted legs is greater than 90°, which can be called large-ang...

Claims

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Application Information

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IPC IPC(8): E01D21/00
CPCE01D2/00E01D19/02E01D21/00E01D2101/268E01D2101/28
Inventor 石丰祥余流高璞王安鑫刘跃武周俊龙李飞
Owner CHINA CONSTR SIXTH ENG DIV CORP
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