Construction method for strengthening construction quality of 0# block of cast-in-situ beam

A technology of construction quality and construction method, applied in the direction of bridges, bridge materials, bridge construction, etc., to achieve the effect of good beam force, improved installation efficiency, and improved effect

Pending Publication Date: 2018-01-12
CHINA RAILWAY NO 3 GRP CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problems existing in the existing No. 0 block construction method, the present invention provides a construction method for strengthening the construction quality of the 0# block of cast-in-place beams

Method used

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  • Construction method for strengthening construction quality of 0# block of cast-in-situ beam
  • Construction method for strengthening construction quality of 0# block of cast-in-situ beam
  • Construction method for strengthening construction quality of 0# block of cast-in-situ beam

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Embodiment Construction

[0043] Taking a certain engineering continuous bridge as an example, the specific embodiment of the present invention is described as follows:

[0044] During the construction of the cantilever pouring beam, in order to bear the weight of the T-beam and the unbalanced moment generated during the cantilever construction, the design drawings provide temporary consolidation measures for the pier beam, and the cantilever box girder is temporarily anchored on the top of the main pier through the temporary consolidation of the pier beam , The pier beam temporary consolidation reinforcement (HRB400Φ32 thread) is pre-embedded in the main pier to set the 1m position, and the upper end 1m is poured in the 0# block together. C50 concrete temporary supports are cast in place on both sides of the top pad stones of 615# and 616# main piers respectively. m.

[0045] Removal of temporary consolidation: The temporary consolidation is removed after the mid-span is closed, and the air compresso...

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Abstract

The invention belongs to the field of continuous beam construction, and provides a construction method for strengthening construction quality of a 0# block of a cast-in-situ beam. The problems existedin an existing 0# block construction method are solved. A detachable stiff skeleton is adopted to position a continuous beam bottom plate rebars and support a top plate during construction, and the top and the bottom of a vertical skeleton are detachable; precise positioning of the vertical layer distance and the horizontal distance of vertical rebars and horizontal rebars of the top plate of thecast-in-situ beam segment can be ensured by arranging an longitudinal and transverse angle steel clamping tool; positioning of all prestressed pipes of a section of a continuous beam is achieved by utilizing a position frame; controlling of the mounting angle of an anchor backing plate is achieved by presetting the mounting angle of an upper inclined plane of an anchor box and a vertical pluggingplate, so that the prestressed tensioning effect is improved by controlling an prestressed tendon axis to be perpendicular to the anchor backing plate; and material steel pipes on a construction siteare effectively and reasonably utilized as concrete material distributing channels and vibrating channels, and full in-place of concrete casting and timely in-place of vibrating are achieved by pre-embedding in advance of the channels.

Description

technical field [0001] The invention belongs to the field of continuous beam construction, and in particular relates to a construction method for strengthening the construction quality of 0# blocks of cast-in-place beams. Background technique [0002] With the rapid development of high-speed railways and expressways, the number of large-span cast-in-place beams has gradually increased, and the number of steel bars and prestressed pipes in the No. 0 block of cast-in-place beams has increased. Pouring quality, resulting in exposed ribs after form removal, honeycomb pitting on the concrete surface, and poor construction quality of concrete, seriously affecting the construction quality of beams; Support system, vibration method, prestressed pipe positioning and other technologies were studied to overcome the problem of poor concrete construction quality. Contents of the invention [0003] In order to solve the problems existing in the existing No. 0 block construction method,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D21/10E01D101/28
Inventor 刘晓栋孙中华何永义石亚军胡国伟魏若枫刘继国李岩周鹏郭星亮宁鑫
Owner CHINA RAILWAY NO 3 GRP CO LTD
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