Construction method for replacing suspender of tied-arch bridge by PLC (Programmable Logic Controller) synchronous tensioning
A Technology of Synchronous Tensioning and Tie-rod Arch Bridge
Inactive Publication Date: 2016-04-20
HANGZHOU MUNICIPAL CONSTR GRP CO LTD
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Problems solved by technology
Some tie-bar arch bridges built in the early days were exposed to the sun and rain and the increasing traffic flow, and there were a lot of water accumulation in the suspenders, uneven mortar inside the suspenders, exposed steel wire bundles, corrosion, slack, position deviation, etc. problems, so in order to prolong the service life of the old tie-arch bridge, these suspenders must be replaced
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[0036] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:
[0037] Such as figure 1 As shown, the construction method of the PLC synchronous tensioning of the tied arch bridge of the present invention to replace the suspender comprises the following steps:
[0038] (1) Support engineering
[0039] The construction sites for boom replacement are all on the arch rib top, and the vault is relatively high from the bridge deck, so it is necessary to erect supports, establish aerial construction passages, and platforms to meet the requirements for boom replacement and monitoring. For stand erection see figure 2 , the specific requirements are:
[0040] (1) Determine the pole spacing of the bracket by checking the strength and stability of the bracket.
[0041] (2) Set up supports, scissor braces and horizontal reinforcement bars in strict accordance with the requirements of the code and the distance betwe...
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The invention relates to the technical field of municipal engineering and discloses a construction method for replacing a suspender of a tied-arch bridge by PLC (Programmable Logic Controller) synchronous tensioning and a computer control method applied to the construction method. The construction method comprises the steps of setting up a support, erecting a temporary suspender, dismantling an original suspender, mounting a new suspender, monitoring the engineering and carrying out subsequent work; the construction method is mainly realized by controlling mutual switching between the original suspender and the temporary suspender as well as between the temporary suspender and the new suspender, and adopting a PLC hydraulic control system to perform synchronous tensioning replacement construction on an old suspender of the tied-arch bridge. According to the PLC hydraulic control system used in the construction method disclosed by the invention, the synchronism, the consistency and the continuousness of all jacks can be guaranteed, and a tension target value can be accurately reached; meanwhile, by using the construction method disclosed by the invention, the safety and the stability of an original bridge structure can be guaranteed; in addition, low noise and less pollution are realized, and the influence on the life and work of surrounding residents is avoided.
Description
technical field [0001] The invention relates to the technical field of municipal engineering, in particular to a construction method for PLC synchronous stretching and replacement of suspenders of a tied arch bridge. Background technique [0002] With the continuous improvement of the social productivity level, the freight load and passenger flow of highway and urban traffic are increasing day by day, and the damage to the bridge is also increasing, thus greatly shortening the service life of the bridge. Some tie-bar arch bridges built in the early days were exposed to the sun and rain and the increasing traffic flow, and there were a lot of water accumulation in the suspenders, uneven mortar inside the suspenders, exposed steel wire bundles, corrosion, slack, position deviation, etc. problem, so in order to prolong the service life of the old tie-arch bridge, these suspenders must be replaced. Contents of the invention [0003] The purpose of the present invention is to ...
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IPC IPC(8): E01D22/00
CPCE01D22/00
Inventor 陈军周送国陈小亮姚宇翔徐达万
Owner HANGZHOU MUNICIPAL CONSTR GRP CO LTD