A right-angle swivel method for bridge arch section
A swivel and right-angle technology, which is applied in the field of right-angle swivel in bridge arch sections, can solve problems such as poor safety, low efficiency, and inflexibility, and achieve the effects of convenient operation, safety, reliability, efficiency, and hoisting
Active Publication Date: 2017-05-10
中铁山桥(南通)有限公司
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Problems solved by technology
At present, the more commonly used on-land swivel construction schemes mainly include large-scale gantry crane lifting scheme and rail flat vehicle transportation scheme, but these two schemes are limited by the track, which has the advantages of large investment, inflexibility, low efficiency, and poor safety. features
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Embodiment
[0023] This embodiment takes the 572t bridge arch section as an example, which includes the left girder and the right girder; and this embodiment uses two 12-axis flat cars, and the single axis can carry 30t, and the axis flat cars are composed of active modules and driven modules. Composed of modules, the driven module is 16.8m long and 2.43m wide; the active module is 4.2m long and 2.31m wide.
[0024] The bridge arch section right-angle swivel method of the present embodiment, concrete steps are as follows:
[0025] (1) According to the size of the 572t bridge arch section in this embodiment, six support piers with gradually increasing heights are evenly laid above the bearing axis of each selected 12-axis flat car. The height of the shortest support pier is 2.2m, and the highest The height of the pier is 3.3m, and pads are laid on the upper surface of the pier;
[0026] (2) if figure 1 As shown, the left truss and the right truss of a single arch section 2 are respective...
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The invention relates to a bridge arch segment right-angle turning method. The bridge arch segment right-angle turning method specifically includes the following steps that firstly, two axis flatcars of the same size and the same specification are selected, and according to the size of arch segments, buttresses with the height gradually increased are evenly laid above the bearing axis of each axis flatcar; secondly, a left truss sheet of each single arch segment is arranged on the buttresses of the first axis flatcar through a crane, and a right truss sheet of each single arch segment is arranged on the buttresses of the second axis flatcar through the crane, so that the arch segments are fixed to the axis flatcars through the buttresses, and at this moment, the left truss sheets and the right truss sheets of the arch segments are almost perpendicular to the direction of a transport ship; thirdly, after the arch segments and the axis flatcars are fixed, the two axis flatcars are steered in a splayed manner in situ, and the operation is conducted repeatedly till the arch segments are turned by 90 degrees; and fourthly, after the arch segments are turned, the turned arch segments are loaded to the ship through the crane in the direction of the transport ship. The bridge arch segment right-angle turning method has the beneficial effects that operation is convenient, investment is small, safety and reliability are achieved, and efficiency is high.
Description
technical field [0001] The invention relates to a bridge construction method, in particular to a right-angle swivel method for a bridge arch section. Background technique [0002] With the increasing number of railway and highway construction projects in our country, more and more bridges are being built in deep mountains and canyons with poor natural conditions, especially long-span steel arch bridges, because this structure is especially suitable for deep valleys and rapid construction. The plateau canyon area with harsh environment. [0003] Among the bridges studied by the present invention, the main bridge adopts a double-layer truss arch bridge with a mid-support type, and the span is arranged as 496m. The main line of the bridge is divided into upper and lower layers according to functions. Slow-moving system with a width of 12m and a middle span of 108m of the main bridge. The lower deck can be moved to both sides through the longitudinal moving track suspended at t...
Claims
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IPC IPC(8): E01D21/08
CPCE01D21/08
Inventor 韩庆广岳长勇那宪伟宋红飞陈方能许超众
Owner 中铁山桥(南通)有限公司