Annular negative pressure foundation cofferdam and construction method thereof
A negative pressure and cofferdam technology, which is applied in the direction of infrastructure engineering, construction, sheet pile walls, etc., can solve the problems of increasing investment in wind power projects, inconvenient construction and demolition work, and large investment in temporary projects, so as to reduce the horsepower level and shorten the construction period. The effect of short length and small amount of construction work
Active Publication Date: 2012-04-25
中电建新能源集团股份有限公司
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Problems solved by technology
[0003] At present, in the foundation construction process of offshore wind turbines, in the construction process of setting up cofferdams as temporary enclosures to create conditions for dry land construction for foundation construction, dredger fill cofferdams or shaped steel sheet pile enclosures commonly used in bridge engineering are often used. Weir, the above cofferdam forms not only require a large investment in temporary projects, but also have a long construction period, and there are major environmental problems. The construction of the project and the later demolition work brought a lot of inconvenience
[0004] In addition, special cofferdam construction ships need to be used for construction before the main project, and various auxiliary ships are equipped. There are many types of ships involved, and the construction period is long, which increases the investment of wind power projects.
Method used
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[0021] like figure 1 As shown, in this embodiment, the annular negative pressure foundation cofferdam is composed of four 1 / 4 circular arc negative pressure foundation structures connected end-to-end through connectors 4 to form a closed ring-shaped structure. The negative pressure foundation structure is formed by splicing three identical arc-shaped barrel bases 1. The barrel base 1 is an arc-shaped steel plate cylinder with only the bottom opening 1-1. The top of the steel plate cylinder is provided with an air hole device 2, and the inside of the steel plate cylinder is An air bag 3 is provided and communicates with the top air hole device 2 .
[0022] Wherein the airbag 3 is made of soft and high tensile strength rubber cloth material, and its volume is slightly smaller than that of the inner cavity of the barrel base 1. The air hole device 2 is used to pump or inflate the airbag 3. In this example, the width of the barrel foundation 1 is 1 meter, and the radius of the in...
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Abstract
The invention relates to an annular negative pressure foundation cofferdam and a construction method thereof. The invention aims to provide the annular negative pressure foundation cofferdam which is low in investment, easy and convenient to construct, and safe and convenient and the construction method for the annular negative pressure foundation cofferdam. According to the technical scheme, the annular negative pressure foundation cofferdam is characterized in that: at least two negative pressure foundation structures are connected end to end through a connecting piece to form a closed annular structure, and the single negative pressure foundation structure is spliced into a section of circular arc of the annular structure by at least one bucket foundation. The cofferdam is suitable for a temporary surrounding structure required by offshore wind turbine foundation construction.
Description
technical field [0001] The invention relates to an annular negative pressure foundation cofferdam and a construction method thereof. It is suitable for the temporary enclosure structure required for the foundation construction of offshore wind turbines. Background technique [0002] In my country, the offshore wind power industry is an emerging industry. After 2000, because the state encouraged the development and utilization of renewable energy, the domestic wind power industry developed rapidly. Due to the fact that the key technical fields are still to be matured, few offshore wind power projects have been implemented at present, and the experience in engineering design and construction is insufficient. [0003] At present, in the foundation construction process of offshore wind turbines, in the construction process of setting up cofferdams as temporary enclosures to create conditions for dry land construction for foundation construction, dredger fill cofferdams or shap...
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Patent Timeline
Login to View More IPC IPC(8): E02D19/04E02D27/44E02D27/52E02D11/00
Inventor 荣洪宝徐江周永
Owner 中电建新能源集团股份有限公司