Launching construction method of steel cofferdam suitable for shallow water area
A construction method and technology for steel cofferdams, which are applied in infrastructure engineering, construction, caisson, etc., can solve the problems of unsuitable draft depth of cofferdams, many hidden dangers in construction safety, and lack of flexibility. Short cycle and flexible effect
Active Publication Date: 2014-05-07
THE 8TH GRP OF CHINA RAILWAY 1ST ENG CO LTD
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[0002] During the construction of the deep-water foundation of cross-river bridges, there are three conventional construction methods for launching steel cofferdams: one is to assemble the steel cofferdams on the assembly ship, and after the assembly is completed, the assembled steel cofferdams will be floated to the pier with the guide ship position, and then use the guide frame to lift the steel cofferdam into the water. This method requires many construction machines, long construction period and high construction cost
The second is the slideway launching method. The steel cofferdam is assembled as a whole on the shore, and then the slideway is used to slide into the water. However, there are many safety hazards in construction and it is not flexible enough.
The third is the air bag launching method. After the steel cofferdam is assembled on the shore, the air bag is used as the steel cofferdam support and the walking system for launching. It can be launched at one time. The process is simple, safe and reliable, saving a lot of time and bringing great benefits. Economic benefits, but only suitable for deep water areas, not suitable for shallow water areas due to the draft limit of the cofferdam
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[0028] The present invention will be further described below in conjunction with the accompanying drawings.
[0029] see Figure 1 to Figure 5 , a steel cofferdam launching construction method suitable for shallow water areas, the steps of which are as follows:
[0030] The first step is to level the steel cofferdam assembling yard; on the shore, a site inclined to the river is leveled as the steel cofferdam assembling yard 13, and the slope of the steel cofferdam assembling yard is 5%;
[0031] The second step is to build a steel cofferdam launching slope; build a steel cofferdam launching slope 12 on the side of the steel cofferdam assembly site near the river and slope to the river. The slope of the steel cofferdam launching slope is 20% ;
[0032] The third step is to set up temporary buttresses and ground anchors; set up temporary buttresses on the steel cofferdam assembly field for installing brackets; set the bank side ground anchor 5 in the middle of the side away fr...
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The invention relates to a launching construction method of a steel cofferdam suitable for a shallow water area. The method includes flatting a steel cofferdam assembly yard; building a steel cofferdam launching slope; arranging temporary buttress and ground anchor; assembling the steel cofferdam; filling in air bags; aerating the air bags and removing the temporary buttress; pushing an excavator in position; arranging a water leading anchor; arranging a guide pulley; pushing the steel cofferdam to a first machine barge; the steel cofferdam is bound with the first machine barge; the steel cofferdam is bound with another machine barge; and floating the steel cofferdam. The method can enable the steel cofferdam to launch in the shallow water area once without stranding, the process is simple, safe and reliable, and time is saved.
Description
technical field [0001] The invention relates to a bridge foundation construction method, in particular to a steel cofferdam launching construction method suitable for shallow water areas. Background technique [0002] During the construction of the deep-water foundation of cross-river bridges, there are three conventional construction methods for launching steel cofferdams: one is to assemble the steel cofferdams on the assembly ship, and after the assembly is completed, the assembled steel cofferdams will be floated to the pier with the guide ship position, and then use the guide frame to lift the steel cofferdam into the water. This method requires many construction machines, long construction period and high construction cost. The second is the slideway launching method. The steel cofferdam is assembled as a whole on the shore, and then the slideway is used to slide into the water. However, there are many construction safety hazards and it is not flexible enough. The thi...
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IPC IPC(8): E02D19/04E02D23/02
Inventor 邓荣王小平杜文斌张开聪黄洪盛李定达周杨戴俊男
Owner THE 8TH GRP OF CHINA RAILWAY 1ST ENG CO LTD
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