A method for dismantling the lower piers and caps of bridges across rivers
A technology for piers and bridges, applied in the field of bridge demolition and construction
Active Publication Date: 2021-07-06
GUANGDONG GUANYUE HIGHWAY & BRIDGE
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Problems solved by technology
[0003] The invention provides a method for dismantling the lower piers and caps of cross-river bridges, which is used to solve the problem of determining the cutting plan of piers and caps at non-navigable holes or tidal flats of cross-river bridges, the implementation of hoisting schemes, and the bearings with pile foundations. Technical issues such as platform cutting and seam construction
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[0034] Taking a bridge across a river as an example, the lower piers and caps of the bridge set at the tidal flat are removed, such as figure 1 As shown in the figure, the pile foundation including the bridge pier 1, the lower cap 2 of the bridge pier 1 and the lower part of the cap 2 is connected, wherein the 0 block 4 is connected above the bridge pier 1; image 3 As shown, the bridge pier 1 is a thin-walled hollow pier, the thickness of the pier body is 4.2m, the width is 10.42m, and the cross-section of the bridge pier 1 is a double-hole structure; Figure 5 and Image 6 As shown, the size of the lower cap 2 of the bridge pier 1 is 11.36m long x 5.5m wide x 2m thick, and there are 8 pile foundations distributed at the lower part of the bridge pier 2 at intervals.
[0035] combine Figure 1 to Figure 9 , to further describe a method for dismantling the lower piers and caps of a cross-river bridge, the specific steps are as follows:
[0036] Step 1. According to the locat...
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The invention discloses a method for dismantling the piers and caps at the lower part of a bridge crossing a river, including the piers and the caps connected below the piers. Design and dismantle the bridge piers together; 2) Determine the horizontal and vertical cutting positions of the bridge piers; 3) Set up the operation platform and cut the bridge piers in blocks; 4) Vertically divide the cap; 5) Determine the elevation of the cutting line of the pile foundation under the cap , carry out the cutting operation; lift the pile foundation and the connected part of the cap. The present invention jointly designs and dismantles the bridge piers and caps located at the non-navigable holes or tidal flats, and cuts part of the pile foundation during dismantling, so that the pile foundation is below the river bed or the ground; Vertical cutting is convenient for hoisting; the pile foundation is cut, and the vertical pipe fixed by the upper and lower two fixing hoops is used to thread the wire saw during the cutting process, which ensures the accuracy of the wire saw cutting.
Description
technical field [0001] The invention relates to the field of bridge dismantling construction, in particular to a method for dismantling a lower pier and a bearing platform of a bridge across a river. Background technique [0002] With the continuous extension of bridge construction, some bridges that cannot meet the upper bearing capacity and regional planning will be demolished, and some old and dangerous bridges will also be demolished and replaced for safety reasons. In the demolition of bridges, there are few construction methods for the lower piers and caps of bridges in cross-river bridges, especially when the piers and caps are located in non-navigation holes or tidal flats, and there is a lack of targeted design; The piers and caps at the bottom are not easy to chisel and remove, and the cutting, dismantling and hoisting increase the difficulty of execution. Therefore, it is necessary to provide a removal method for the lower piers and caps of cross-river bridges. ...
Claims
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IPC IPC(8): E01D24/00
CPCE01D22/00
Inventor 邓洪钧陈小丽杨卓伟陈仲耀李自坤郑日华李晓辉王小恒曾繁兴张伟景卢玲霞
Owner GUANGDONG GUANYUE HIGHWAY & BRIDGE