Method for entering river of parallel edges-free cofferdam with air bags
A technology of cofferdams and airbags, applied in the direction of erecting/assembling bridges, bridges, caissons, etc.
Active Publication Date: 2012-11-28
CHINA RAILWAY MAJOR BRIDGE ENG GRP CO LTD
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Problems solved by technology
[0003] Aiming at the defects in the prior art, the object of the present invention is to provide a method for going down the river with an air bag without parallel side cofferdams, which solves the problem of using air bags to go down the river without parallel side cofferdams or pointed bottom cofferdams, and widens the The scope of application of the cofferdam air bag down the river method has been clarified, and it has great promotion value
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[0025] The manner of the present invention will be described in further detail below in conjunction with the accompanying drawings.
[0026] A method for going down the river without parallel side cofferdam airbags of the present invention comprises the following steps:
[0027] (1) if Figure 1 to Figure 4 As shown, the assembly site is arranged first. The assembly site is a ramp facing the river with a certain downhill slope. The slope of the ramp is between 3% and 6%, and the slope near the water surface gradually increases. After the ramp enters the water, The slope of the riverbed should meet the draft requirement of the cofferdam 1 after launching. Lay a pair of pallets 4 on the ground A preset in the assembly site, and the pallets 4 in this embodiment are steel plates with a thickness of 20 mm. Install multiple brackets 3 at equal intervals on each of the supporting plates 4, and fix them by spot welding with the supporting plates 4 at the same time, and the brackets ...
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The invention relates to a method for entering a river of a parallel edges-free cofferdam with air bags, comprising the following steps of: (1) firstly arranging an assembling field, laying a pair of supporting plates on a set ground, and installing a plurality of pieces of supporting brackets on the supporting plates; (2) installing a pair of steel supporting beams, wherein each steel supportingbeam is respectively opposite to one supporting plate, the supporting brackets are hung and tightly abutted through a hanging steel rope and fixed with the steel supporting beams; (3) assembling a cofferdam, wherein the inner wall of the cofferdam and two ends of the steel supporting beams are welded; (4) arranging a plurality of air bags below the supporting plates, arranging a control device, inflating the air bags to support the cofferdam, slowly releasing the air bags to river banks under the control of the control device, separating the control device from the cofferdam when the distanceof the front edge of the cofferdam away from a water edge line is 3-5m, and rolling the cofferdam, the steel supporting beams and the supporting brackets into water; and (5) regulating the position of the cofferdam after rolling to a river, cutting the hanging steel rope, separating the supporting brackets and then floating the cofferdam in position. The method solves the problem that parallel edges-free cofferdam or pointed bottom cofferdam enters the river with the air bags and widens the application range of a method for entering the river of a cofferdam with the air bags.
Description
technical field [0001] The invention relates to the field of bridge construction, and specifically relates to a method for going down a river without parallel side cofferdam airbags. Background technique [0002] In the existing bridge construction, the foundation construction is mostly a rectangular or round-ended large-scale steel suspension box or a steel box cofferdam scheme, and the cofferdam usually adopts the airbag method to go down the river as a whole, that is, after the downhill site is arranged, the The cofferdam has a cofferdam wall and floor that are parallel to each other as a slideway structure, and a number of airbags are placed under it. Through the rolling of the airbags on the slope, the steel cofferdam is driven from the shore to the water, which is convenient for consignment. However, this rectangular or round-ended cofferdam has at least one set of cofferdam walls parallel to each other, so as to make a slideway structure, but in the construction of ci...
Claims
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IPC IPC(8): E01D21/00E02D19/04E02D23/02
Inventor 秦顺全周外男张立超农代培刘俊皮军云季跃华徐进涂满明李军堂童林鸿田继开刘爱林宋承永潘军陆炳良汪水清孙健家毛伟琦刘润泽张金杯廖国兴郑大超周伟姚伟王迪姚华冯少波
Owner CHINA RAILWAY MAJOR BRIDGE ENG GRP CO LTD