Rapid positioning method for deepwater steel cofferdam or open caisson
A positioning method and technology of steel cofferdam, which are applied in construction, infrastructure engineering and other directions to achieve the effect of reducing the number of winches, shortening the construction period and saving construction costs
Active Publication Date: 2022-07-08
CCCC SECOND HARBOR ENG
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Problems solved by technology
[0004] The invention provides a deep-water steel cofferdam or caisson rapid positioning method, which solves the problem of quickly realizing the accurate installation and positioning of the steel cofferdam under the condition of limited construction period
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Embodiment Construction
[0048] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0049] A positioning device method for rapid positioning of a large steel cofferdam according to the present invention is as follows:
[0050] a. Construction of the main pier platform, such as figure 2As shown, through the vertical steel pipe pile 2.1 and the horizontal distribution beam formed by the vertical distribution beam and the horizontal distribution beam connection between the steel pipe pile 2.1 and the diagonal brace 2.2, the horizontal distribution beam 2.3 above the steel pipe pile 2.1, the horizontal distribution beam above the The Bailey beam 2.4, the horizontal distribution beam 2.5 above the Bailey beam, and the steel panel 2.6 above the horizontal distribution beam 2.5 are constructed to form the operation platform 2; by installing the anchor beam 3.1 on the vertical steel pipe pile 2.1 of the operation platform, du...
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The invention provides a method for quickly positioning a deepwater steel cofferdam or an open caisson, which is characterized by comprising the following steps of: installing a plurality of cable-pulling positioning system devices equipped with traction equipment on a construction platform of a trestle or an overwater operation ship; the whole cofferdam is transported to a proper position of the downstream of a main pier platform in a floating mode, a pulling lug at the front end of the cofferdam is connected with a platform pulling cable positioning system, and pulling cables are retracted and released under the assistance of a ship machine to adjust the posture of the steel cofferdam; the tail end of the cofferdam is provided with a crossed splayed anchor for positioning through a winch tail cable system; and the cable pulling systems at the front end and the tail part of the cofferdam are gradually retracted and released, so that the accurate positioning of the steel cofferdam is finally realized, and the accurate mounting and positioning of the steel cofferdam can be quickly realized under the condition of limited construction period.
Description
technical field [0001] The invention relates to the field of deep-water foundation construction of bridge engineering, in particular to a method for rapid positioning of deep-water steel cofferdams or caissons. Background technique [0002] The double-walled steel cofferdam is a water stop structure for the construction of the cap and the support structure of the drilling platform. The common positioning methods are as follows: 1. Positioning of the positioning ship: The advantage of the positioning ship positioning scheme is that the construction experience is mature and the construction difficulty is small. The construction speed is fast; the disadvantage is that the number of ships and anchor cables is large, which has a great impact on the channel, and the positioning system is a flexible system, and the ships are disturbed by water level fluctuations, and the positioning accuracy is low. It is suitable for the positioning construction of double-walled steel cofferdams w...
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IPC IPC(8): E02D19/04
CPCE02D19/04
Inventor 穆清君李贤仰姚杰杜松肖慧林周端黄华叶永辉李东辉林飞扬
Owner CCCC SECOND HARBOR ENG