Construction method suitable for continuous steel structure cantilever beam closure in loess areas
A construction method and cantilever technology, applied in the direction of bridges, bridge construction, erection/assembly of bridges, etc., to achieve the effect of strong practicability, shortening construction period, and reducing conversion time
Active Publication Date: 2020-11-13
中建七局交通建设有限公司 +1
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Problems solved by technology
[0003] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a construction method suitable for the closing of continuous steel cantilever girders in loess areas, which effectively solves the problem of the closing sequence of continuous rigid cantilever beams and reduces the number of main bridges. The time for system conversion reduces the maintenance cost of workers and the rental time of machinery, greatly reduces the potential safety hazards of bridge construction, and achieves the goal of shortening the construction period and ensuring construction quality and safety
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[0016] The specific implementation manners of the present invention will be described in further detail below in conjunction with the accompanying drawings.
[0017] Construction steps of the present invention comprise:
[0018] Step 1: Construction of No. 0 beam section: The load-bearing of the bracket is designed according to two pourings. The embedded parts are constructed during the last two stages of the double thin-walled piers, and the tower crane is used for hoisting on site. The 0# box girder is poured twice. Pre-buried the bracket φ32 chamfered corbel reinforcement and 5cm PVC pipe on the top of the pier, and reserved the slot position. During the installation, first penetrate the φ32 fine-rolled rebar to install the joists, then lay the I-steel longitudinal and beams, and set up the buckle-type brackets with a spacing of 90x90cm. Secondly, temporary buttresses are used at the top of the side-span consolidation pier, and the cross-section of the pier is 1.2. There a...
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The invention relates to a construction method suitable for continuous steel structure cantilever beam closure in loess areas. According to the technical scheme, the construction method comprises thesteps that construction of a zero beam section is carried out, specifically, bracket bearing is designed according to two-time pouring, embedded parts are constructed in the last two stages of a double-thin-wall pier, hoisting is conducted through a tower crane on site, two-time pouring of a zero box girder is completed, cantilever pouring section construction is conducted, and a middle span closure section, a side span cast-in-situ section, a side span closure section and a secondary middle span closure section are constructed.
Description
technical field [0001] The invention relates to the field of construction of continuous rigid frame bridges in loess areas, in particular to a construction method suitable for continuous rigid frame cantilever beams in cold weather in loess areas. Background technique [0002] The construction process of the cantilever beam of the continuous rigid frame bridge is generally the construction of the bracket of the No. 0 beam section of the main bridge, the construction of the 1#-15# beam section of the main bridge hanging basket circular cantilever pouring, the construction of the side pier bracket and side span cast-in-place section, and the whole bridge is closed. The pouring sequence of the sections is as follows: the first side span, the second mid-span, and the last mid-span are closed in sequence. The continuous rigid frame bridges in the loess area of Northwest China often cross gullies to form river valleys, and the height of pier columns exceeds 80m. It is complicate...
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Login to View More IPC IPC(8): E01D21/10
CPCE01D21/10E01D21/105
Inventor 杨伟齐宁宁许保生吴靖江陈小羊张永松申长城胡连超韩亚光张文秦亚丽李轾段中华
Owner 中建七局交通建设有限公司