Linear adjustment method of track girder bridges of straddle-type monorail transportation simple-support-first rigid-framework-second system

A technology of straddle type monorail and adjustment method, which is applied in the directions of bridges, bridge construction, erection/assembly of bridges, etc., can solve the problem of increasing the self-weight deflection of prefabricated track beams, increasing the difficulty of linear control of prefabricated beams, and increasing the difficulty of falling beams. risk, etc.

Inactive Publication Date: 2014-09-10
BEIJING JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the stiffness of the rigid frame is relatively small compared to the stiffness of the beam body, this greatly increases the self-weight deflection of the prefabricated track beam and increases the difficulty of controlling the alignment of the prefabricated beam body
At the same time, the larger mass of the track girder is simply supported on the two vertical adjustment steel plates on the top of the pier through a smaller volume rigid frame, which increases the risk of falling beams

Method used

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  • Linear adjustment method of track girder bridges of straddle-type monorail transportation simple-support-first rigid-framework-second system
  • Linear adjustment method of track girder bridges of straddle-type monorail transportation simple-support-first rigid-framework-second system
  • Linear adjustment method of track girder bridges of straddle-type monorail transportation simple-support-first rigid-framework-second system

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Experimental program
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Embodiment 2

[0041] Embodiment 2 A straddle-type monorail transit line is designed and constructed by adopting a simple-supported rigid-frame system first. Among them, the span of the prefabricated steel track beam in a 3-span simply supported and then rigid frame system is 80m; the number of spans N is 3.

[0042]Step 1. According to the construction method instruction book and the manufacturing process, the prefabricated steel track beam body 1 with a span of 80m for the rigid frame system is produced in the workshop. At both ends of the prefabricated steel track beam body 1, there are reserved upper bases 5a-1 for installation channel, such as Figure 14 shown;

[0043] Step 2: Install the upper base 5a-1 on the prefabricated track beam body 1 by reserving the channel, such as Figure 15 shown;

[0044] Step 3 select the main screw jack 2a and the main screw jack 2b. During use, one end of the main screw jack 2a is installed on the upper base 5a-1, as Figure 16 As shown; install o...

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Abstract

The invention discloses a linear adjustment method of track girder bridges of a straddle-type monorail transportation simple-support-first rigid-framework-second system. By means of the method, when a prefabricated track girder bridge is subjected to linear adjustment, fire working operation on site is omitted, weight deflection, generated in the simple support stage, of the prefabricated track girder bridge is reduced, accidents of track girder falling are prevented, and safety in the construction process is improved.

Description

technical field [0001] The invention relates to a method for adjusting the alignment of a straddle-type monorail traffic first simply supported and then a rigid frame system track girder bridge, in particular a method suitable for adjusting the alignment of a prefabricated and then assembled beam body during construction. Background technique [0002] Most of the track beams in the existing straddle monorail transit system are in the form of simply supported beams. Considering the expansion and contraction deformation of the track beams or turnouts when the temperature changes or the foundation settlement, expansion joints are set at both ends of the track beams or turnouts . At present, the maximum span of simply supported PC track beams with equal height of 1.5m is about 24m, so the number of expansion joints on a line is very large, and when the train passes through these expansion joints, it will generate greater impact and vibration, which will affect the life of the ve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D21/00
Inventor 朱尔玉黄鑫郭占明王宏亮
Owner BEIJING JIAOTONG UNIV
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