Method for strengthening box girder prefabricated segment box chamber

A segment and box room technology, applied in bridge reinforcement, bridge, bridge construction, etc., can solve problems such as troublesome implementation, heavy weight, and complexity, and achieve the effect of saving materials, convenient implementation, and computational science.

Active Publication Date: 2014-01-01
CHINA RAILWAY NO 2 ENG GRP CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] In the process of erecting bridges, the general box girder adopts the prefabrication process. During installation, the bridge erecting machine is used to install the prefabricated section of the box girder. During installation, the bridge erecting machine has two supports, one is supported on the pier, and the other is supported At the beam end of the prefabricated section of the box girder that has been installed, since the prefabricated section of the box girder is a hollow structure, the self-weight of the bridge erecting machine plus the weight of the prefabricated section of the box

Method used

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  • Method for strengthening box girder prefabricated segment box chamber
  • Method for strengthening box girder prefabricated segment box chamber
  • Method for strengthening box girder prefabricated segment box chamber

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Embodiment 1

[0030] The embodiment of the present invention is the 2312 mark of the R2 line of urban rail transit in Dongguan City, and the bridge erecting machine 3 is used as the DP50 / 30-A3 uplink segmental assembly bridge erecting machine 3; according to figure 1 , when installing the box girder precast section, the RA outrigger 1 of the bridge erecting machine 3 is supported on the beam end of the installed box girder precast section 4, the RB outrigger 2 is supported on the pier 6, and the box girder precast section 5 to be installed Suspended on the bridge erecting machine 3;

[0031] Step 1: After determining the relevant basic data, check and calculate the local pressure of the RB outrigger 2 placed at the pier 6 supporting pad stone:

[0032] The size of the supporting pad is 700mm*700mm; the bottom area of ​​the 3 legs of the bridge erecting machine is 490mm*490mm. During the static load test, the reaction force of RB outrigger 2 is 2710KN, and the important coefficient of the b...

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Abstract

The invention relates to the field of civil engineering, in particular to a method for strengthening a box girder prefabricated segment box chamber. According to the method, firstly, after a series of basic data are determined, local pressure-bearing checking and calculating are performed on a girder portion, in contact with a supporting leg of a bridge erecting machine, on the box chamber, punching checking and calculating are performed on a top board, and eccentric pressure-bearing and pulling-bearing checking and calculating are performed on a box chamber web in a position, in contact with the supporting leg of the bridge erecting machine, on the box chamber with finite element analysis software after qualification is achieved; secondly, different supporting structures are set in the finite element analysis software, a certain numerical value obtained in eccentric pressure-bearing and pulling-bearing checking and calculating is used as the main environmental initial datum, finite element analysis is performed on the supporting structures respectively, and multiple groups of qualified solutions are obtained, and the optimal solution is selected to finally perform material selecting. The method for strengthening the box girder prefabricated segment box chamber is scientific in calculation, capable of saving materials and convenient to carry out.

Description

technical field [0001] The invention relates to the field of civil engineering, in particular to a method for reinforcing a prefabricated section box chamber of a box girder. Background technique [0002] In the process of erecting bridges, the general box girder adopts the prefabrication process. During installation, the bridge erecting machine is used to install the prefabricated section of the box girder. During installation, the bridge erecting machine has two supports, one is supported on the pier, and the other is supported At the beam end of the prefabricated section of the box girder that has been installed, since the prefabricated section of the box girder is a hollow structure, the self-weight of the bridge erecting machine plus the weight of the prefabricated section of the box girder to be installed is very large, which is different from that of the bridge erecting machine One of the box girder ends that is in contact with the support will often have cracks or ev...

Claims

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Application Information

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IPC IPC(8): E01D22/00
Inventor 郑福建卿三惠王波何开伟刘泽金洲王莉
Owner CHINA RAILWAY NO 2 ENG GRP CO LTD
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