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A method of locking and adjusting the steel beam of a long-span cable-stayed bridge

A cable-stayed bridge, long-span technology, applied in cable-stayed bridges, bridges, bridge forms, etc., can solve problems such as occupying jack resources, and achieve the effects of high installation accuracy, easy operation, and cost savings

Active Publication Date: 2017-04-26
THE 2ND ENG CO LTD MBEC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method needs to make a large number of steel pads and place them between the steel beam and the pad stone, and takes up a lot of jack resources for a long time

Method used

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  • A method of locking and adjusting the steel beam of a long-span cable-stayed bridge
  • A method of locking and adjusting the steel beam of a long-span cable-stayed bridge
  • A method of locking and adjusting the steel beam of a long-span cable-stayed bridge

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Embodiment Construction

[0029] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

[0030] see figure 1 , figure 2 As shown, the embodiment of the present invention provides a method for locking and adjusting the steel girder of a long-span cable-stayed bridge with convenient layout and flexible and precise operation, which includes the following steps:

[0031] Step 1. Provide two convex bearing pad stones 7, the bearing pad stones 7 include a pad stone raised portion 71, the pad stone left side 72 and the pad stone right side 73, and each support pad stone 7 is erected A pair of steel beams 1, and the steel beams 1 are supported by jacks;

[0032] Step 2, install the support 2 on the upper surface of the raised part 71 of the support pad stone, and grout the support 2;

[0033] Step 3. After the strength of the support 2 reaches the design strength, place the two pairs of steel beams 1 on the corresponding support 2 res...

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Abstract

The invention discloses a large-span cable-stayed bridge steel beam locking and adjusting method and relates to the technical field of bridge construction. The method comprises the steps that 1, formal supports are installed and support grouting is completed after erection of four steel beams at the tops of piers is completed; 2, limiting brackets on two sides of each support are installed before stay cable tensioning, and wedge-shaped cushion blocks are densely padded between support padstones and the limiting brackets; 3, stress application is performed through upstream and downstream diagonal jacks to complete steel beam axis adjustment when steel beam line shapes are needed to be adjusted. By the adoption of the large-span cable-stayed bridge steel beam locking and adjusting method, the manufacturing and using amounts of the pier top cushion blocks can be effectively decreased, the time required by the large-tonnage jacks is shortened, the formal supports are installed in advance, the problems of large support installation difficulty and difficult accuracy control after closure are avoided, and the steel beam axes can be very conveniently adjusted in the beam erection process. The method is simple and convenient to operate, saves the costs and has higher promotional value.

Description

technical field [0001] The invention relates to the technical field of bridge construction, in particular to a method for locking and adjusting steel girders of a long-span cable-stayed bridge. Background technique [0002] In the construction of traditional steel truss girder bridges, before the erection of steel girders, a large number of steel pads are used to set up temporary supports on both sides of the pad stones of the main tower pier support to support the steel girders. And brackets are provided at the bottom of the steel beams on both sides of the lower beam for longitudinal locking of the steel beams. During the cantilever erection of the steel girder, if the alignment of the steel girder needs to be adjusted, multiple large-tonnage jacks are required to raise the steel girder as a whole, and then horizontal jacks are used to push horizontally to adjust the alignment of the steel girder. This method needs to make a large number of steel pads and place them betwe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E01D21/00E01D11/04
CPCE01D11/04E01D21/00
Inventor 严友建付建宏刘润泽李睿王慧娟汤忠国黄中华陈成炫
Owner THE 2ND ENG CO LTD MBEC
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