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Construction method for non-cantilever sections of sidespans of multiplex continuous beam or steel-constructed beam

A construction method and rigid structure technology, applied in bridges, bridge construction, erection/assembly of bridges, etc., can solve problems such as high safety risks, large investment, complex construction process, etc., and achieve obvious advantages

Active Publication Date: 2014-01-15
CHINA RAILWAY MAJOR BRIDGE ENG GRP CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The technical problem to be solved by the present invention is to solve the problems of large investment, high safety risk, complex construction process and long time-consuming in the construction of non-cantilever sections of side spans of multi-connected continuous beams or rigid frame beams

Method used

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  • Construction method for non-cantilever sections of sidespans of multiplex continuous beam or steel-constructed beam
  • Construction method for non-cantilever sections of sidespans of multiplex continuous beam or steel-constructed beam

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Embodiment Construction

[0020] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0021] figure 1 A schematic diagram of the bridge span arrangement of 3 holes and 1 continuous (rigid frame) beam is shown, in which the bridge span layout form of each continuous (steel structure) beam is the same. Each continuous (rigid frame) beam is carried by two main piers (or rigid frame piers) and two side piers, for example, the first joint L1 has two main piers (or rigid frame piers) 21, 22, two side piers Pier 1 and the second joint L2 have two main piers (or rigid structure piers) 23 and 24, and two side piers 1, and the side piers 1 between the first and second joints are also two continuous junction piers.

[0022] Depend on figure 1 It can be seen that after the cantilever construction of the beam body is symmetrically carried out on the main piers 21, 22, 23, and 24, there must be non-cantilever section construction between the main piers 22, 23 and...

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Abstract

The invention discloses a construction method for non-cantilever sections of sidespans of a multiplex continuous beam or a steel-constructed beam, which comprises the following steps: A10. respectively installing left formal supports, right formal supports, left temporary supports and right temporary supports at the tops of abutment piers; A20. respectively installing left sidespan top blocks and right sidespan top blocks on the left formal supports, the right formal supports, the left temporary supports and the right temporary supports; A30. casting temporary fill concrete in gaps between the left sidespan top blocks and the right sidespan top blocks, and horizontally and temporarily connecting finely-rolled threaded bars with vertical temporary anchoring finely-rolled threaded bars to form a firm and stable structure; A40. performing extension construction on lower left segment blocks and lower right segment blocks of a left sidespan and a right sidespan in sequence by adopting a cantilever method, and respectively anchoring through temporary auxiliary cantilever cables; A50. closing to an adjacent T-constructed cantilever beam; and A60. removing a temporary structure. In the construction method for the non-cantilever sections of the sidespans of the multiplex continuous beam or the steel-constructed beam, special treatment is performed on the two top blocks at the tops of the abutment piers of the adjacent sidespans to form an integral structure which is similar to a No. 0 block, and the non-cantilever section construction is performed on the integral structure like the T-constructed cantilever construction, thereby, the defects generated by adopting the existing construction methods in the past, such as a support method, a bridge girder erection machine hanging method and the like, are overcome.

Description

technical field [0001] The invention relates to a bridge construction method, in particular to a construction method for a side span non-cantilever section of a multi-connected continuous beam or a multi-connected rigid frame beam. Background technique [0002] The continuous beam or rigid frame beam cantilever construction method is to use the completed bridge piers to hang out section by section along the span direction of the bridge and connect them symmetrically. It is a bridge construction method widely used at present. Or hanging basket cantilever pouring construction, but in the two construction methods, there are always non-cantilever constructions on both sides of the head and tail spans, which has always been a major technical problem in the construction of this type of bridge. With the continuous development of bridge technology and the continuous improvement of bridge construction level, there are more and more working conditions for erecting bridges in deep wate...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E01D21/00
Inventor 杨齐海高兴泽张炜烽杨晖刘防震代强波
Owner CHINA RAILWAY MAJOR BRIDGE ENG GRP CO LTD
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