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Construction method of large-cantilever inclined-web wide-width box girder

A construction method and inclined web technology, applied in bridges, bridge materials, bridge construction, etc., can solve the problem of low lateral bending load-bearing capacity of box girder structures, and achieve the goal of improving sewage interception effect, reducing difficulty, and reducing pressure Effect

Active Publication Date: 2021-12-07
安徽建工路港建设集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this construction method solves the problem of low transverse flexural bearing capacity of the box girder structure and can reduce the occurrence of transverse cracks in the concrete roof to a certain extent, there are still improvements in terms of improving the mechanical performance of the construction platform and reducing the difficulty of on-site construction. place

Method used

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  • Construction method of large-cantilever inclined-web wide-width box girder
  • Construction method of large-cantilever inclined-web wide-width box girder
  • Construction method of large-cantilever inclined-web wide-width box girder

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Embodiment 1

[0038] figure 1 It is the construction flow chart of the construction method of the large cantilever inclined web wide box girder of the present invention, with reference to figure 1 As shown, the construction method of large cantilever inclined web wide box girder includes the following construction steps:

[0039] 1) Construction preparation: prepare the column bottom pier 2, the inner support box 64, the box girder inner formwork 25 and the box girder outer formwork 24, and prepare the materials and devices required for construction;

[0040] 2) Layout of the construction platform: Set up the column bottom support pier 2 on the foundation soil body 1, and insert the bottom end of the support column 3 into the column connection groove 4 on the upper surface of the column bottom support pier 2, and connect the support column through the bottom plate anchor bolt 5 The bottom plate 6 is firmly connected with the pier 2 at the bottom of the column; grouting is injected into the...

Embodiment 2

[0048] refer to Figure 2-Figure 7 As shown, for a wide box girder with a large cantilever oblique web, the support column 3 is embedded in the column connection groove 4 on the upper surface of the pier 2 at the bottom of the column, and is connected through the anchor bolt 5 of the bottom plate and the closing body 7 at the bottom of the column; The top of the support column 3 is provided with an upwardly convex doorway top beam 12, a rigid support net 17 and a flexible waterproof cloth 18; a suspension support beam 31 is provided below the casted section 26 of the box girder, and in the box girder cavity of the casted section 26 of the box girder Set the inner support box 64; adopt the assembled inner wall side formwork 60; control the horizontal position of the arc plate positioning rib 50 and the positioning arc plate 48 through the hanging plate alignment bolt 47, and control the positioning of the hanging plate 46 and the positioning arc plate 48 through the hanging plate ...

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Abstract

The invention relates to a construction method of a large-cantilever inclined-web wide-width box girder. The construction method comprises the following steps: 1) carrying out construction preparation; 2) laying a construction platform; 3) constructing a poured section of the box girder; 4) erecting an outer mold of the box girder; 5) arranging inhaul cable penetrating pipes; 6) arranging reserved holes; 7) erecting an inner mold of the box girder; and 8) tensioning and cutting the box girder inhaul cable. The method has the beneficial effects that the supporting stand columns are embedded into the stand column connecting grooves in the upper surfaces of the column bottom supporting piers and connected with the column bottom sealing bodies through the bottom plate anchor bolts, and the connecting strength of joints can be improved while the construction efficiency is improved; meanwhile, the upward-protruding door opening top cross beams, the rigid supporting nets and the flexible waterproof cloth are arranged at the top ends of the supporting stand columns opposite in the mirror image, the flexible waterproof cloth communicates with the inner drainage ditch, the pressure borne by the supporting stand columns can be reduced, and the pollutant intercepting effect of the construction platform can be improved.

Description

technical field [0001] The invention relates to a construction method of a large cantilever oblique web wide box girder that can effectively improve the safety of a construction platform, reduce the difficulty of on-site construction, and improve the on-site construction efficiency, and is suitable for bridge engineering. Background technique [0002] With the development of long-span continuous girder bridges in China, the bridge structure system is becoming more and more complex. In the construction of wide-width box girders, there are mainly straight web box girders and oblique web box girders, and a few use fish-belly box girders. In the construction of oblique web box girders, the accuracy of formwork support positioning, prestress tension control, and safety of protective sheds are often the key points and difficulties of on-site construction. [0003] In the prior art, there is a large cantilever wide box girder structure with cross bracing, which is characterized in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D21/00E01D2/04E01D101/28
CPCE01D21/00E01D2/04E01D2101/28Y02A30/60
Inventor 岳跃稳鲁传强王芳李学良钮玉亭岳远哲朱少东卫少君周超左明
Owner 安徽建工路港建设集团有限公司
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