Dry method installing construction method for offshore large-tonnage prefabricated abutment
A technology of construction method and installation method, which is applied in basic structure engineering, erection/assembly of bridges, bridges, etc., can solve the problems of low installation and operation efficiency of large-scale machinery, and it is difficult to achieve stable installation and construction of prefabricated piers and abutments, so as to meet the construction strength. And the effect of safety and efficiency, high construction efficiency and reasonable design
Inactive Publication Date: 2015-06-24
NO 1 ENG COMPANY CO LTD OF CCCC FIRST HARBOR ENG COMPANY +1
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Problems solved by technology
[0003] Although prefabricated piers can be directly constructed in water bodies, due to the influence of wind and waves at sea, the installation and operation efficiency of large machinery is very low, and it is difficult to achieve stable installation and construction of prefabricated piers
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[0030] The dry installation and construction method of the offshore large-tonnage prefabricated piers are as follows:
[0031] 1. Use large-diameter steel cylinder cofferdams for vibration-sinking construction to form a dry construction environment; figure 1 As shown, a steel cylinder cofferdam 20 with a diameter greater than the maximum diagonal length of the prefabricated pier is used to carry out vibration-sinking construction outside the six steel pipe piles 10 at the installation position of the prefabricated pier, and excavate the inside of the steel cylinder cofferdam. Install the steel support at the bottom of the steel cylinder cofferdam.
[0032] 2. Setting of hanging points for prefabricated piers; figure 2 As shown, the post-casting hole 32 is reserved on the bottom cap 30 of the prefabricated pier abutment, the embedded parts are set, and the back-pressure beam 31 is set on the diameter of the post-casting hole corresponding to the part where the hydraulic suppo...
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A dry method installing construction method for an offshore large-tonnage prefabricated abutment comprises the steps that vibration sinking construction is carried out through a large-diameter steel cylinder cofferdam to form a dry construction environment; back pressure beams are arranged on rear pouring holes of the prefabricated cofferdam, hydraulic ejecting supporting devices are correspondingly arranged on steel pipe piles in the steel cylinder cofferdam, and the hydraulic ejecting supporting devices can carry out positioning pre-supporting on the prefabricated abutment through hoisting; pouring butt joint of the rear pouring holes and the steel pipe piles is achieved. According to the dry method installing construction method for the offshore large-tonnage prefabricated abutment, the design is reasonable, the construction efficiency is high, the installing construction of the prefabricated abutment under the dry environment is achieved, precise positioning and high-strength foundation pouring connection of the large prefabricated abutment can be finished, and the requirements of projects for the construction strength, safety and efficiency are met.
Description
technical field [0001] The invention belongs to the installation and construction technology of prefabricated piers and abutments of offshore viaducts, and in particular relates to a method for installing and constructing prefabricated abutments in a dry construction environment. Background technique [0002] With the development of bridge and viaduct technology, the construction of viaducts on the sea or across waters has become an important project of bridge construction. Since viaducts mostly adopt continuous steel box girder bridges, the supports of non-navigation bridges are mostly prefabricated pier structures, which can be divided into integral pier, cap plus lower section pier, middle section pier and upper section pier Four types of body. Since the overall weight of the prefabricated piers can reach nearly 4,000 tons, how to carry out effective and safe hoisting and positioning installation has become an important technical problem to be solved. [0003] Although ...
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IPC IPC(8): E01D21/00E02D27/16
CPCE01D21/00E02D27/16
Inventor 徐波王文山孙建波沈家海王一鹏邵凯史虎彬冯宝强
Owner NO 1 ENG COMPANY CO LTD OF CCCC FIRST HARBOR ENG COMPANY