Pushing construction method of double-width steel box girder
A technology of jacking construction and steel box girder, applied in bridges, bridge construction, erection/assembly of bridges, etc., can solve the problems of long demolition time, high construction cost, steel box girder error, etc. The effect of high construction efficiency and less investment in equipment
Active Publication Date: 2020-10-27
CHINA RAILWAY 18TH BUREAU GRP CO LTD +2
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Problems solved by technology
[0002] During the jacking construction of large continuous steel box girders, due to the special structure of the double-width steel box girder, its width is large, and the general jacking method requires a lot of jacking equipment. At the same time, the construction process is cumbersome and the construction cost is high. When the steel box girder is lifted, it takes a long time to dismantle it; at the same time, due to the asynchrony of the jacking equipment, it is easy to cause the error of the steel box girder bridge, which cannot be well adapted to the continuous double-width steel box girder.
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[0025] The present invention will be described in further detail below in conjunction with the accompanying drawings and examples.
[0026] see figure 1 , figure 2 , present embodiment is a kind of jacking construction method of double width steel box girder, carries out as follows:
[0027] A. Build a construction platform
[0028] A permanent guardrail platform 2 is set on the upper part of both sides of the permanent pier 1, and the permanent guardrail platforms 2 on both sides are connected by connecting beams 2-1, and the permanent guardrail platform 2 is used to provide walking passages for construction workers during the pushing process ( Figure 5 , Figure 6 shown);
[0029] B. Installation of pushing equipment
[0030] The top surface of the permanent pier 1 is provided with a plurality of bearing pad stones 3 ( image 3 , Figure 4 As shown), the leveling steel plate 4 is placed on the upper part of the support pad stone 3, the leveling steel plate 4 is clos...
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The invention relates to steel box girder construction, in particular to a pushing construction method of a double-width steel box girder. The method comprises the following steps that A, a construction platform is erected; B, pushing equipment is installed; C, the left section of the steel box girderis pushed, and the steel box girder is jacked by 3-5cm by using a hydraulic jack after the pushingis finished; D, the pushing cushion block is arranged below the steel box girder, the hydraulic jack falls back, the pushing cushion block supports the steel box girder, and the pushing cushion blockis stressed; E, the walking type pushing machine is pulled to the right side through a winch, the step C and the step D are repeated, and pushing of the same section of the steel box girder is conducted; and F, the walking type pushing machine is transversely moved back and forth until the whole left and right multi-section steel box girders are pushed. The pushing work of the left and right steel box girders is completed by using one set of walking equipment, the construction is simple, the investment equipment is less, the left and right positions of the pushing equipment are freely switched, and the construction efficiency is high.
Description
technical field [0001] The invention relates to the construction of steel box girders, in particular to a method for pushing construction of double-width steel box girders. Background technique [0002] During the jacking construction of large continuous steel box girders, due to the special structure of the double-width steel box girder, its width is large, and the general jacking method requires a lot of jacking equipment. At the same time, the construction process is cumbersome and the construction cost is high. When the steel box girder is lifted, it takes a long time to dismantle it; at the same time, due to the asynchrony of the jacking equipment, it is easy to cause errors in the formation of the steel box girder bridge, which cannot be well adapted to the continuous double-width steel box girder. Contents of the invention [0003] The purpose of the present invention is to solve the above technical problems and provide a double-width steel box girder push construct...
Claims
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Login to View More IPC IPC(8): E01D2/04E01D21/00
CPCE01D2/04E01D21/00
Inventor 于长彬贺常松田波董健刚李惠民张燕军
Owner CHINA RAILWAY 18TH BUREAU GRP CO LTD