Cylindrical foundation sinking device for ground breaking drag resistance and pressure maintenance and sinking method thereof

Abstract

The invention discloses a cylindrical foundation sinking device for ground breaking drag resistance and pressure maintenance. The device consists of a cylindrical foundation, an arrow ground breaking drag resistance ring, an external impermeable pressure maintenance film, a cylinder wall anchor ring, a soil anchor ring, an exhaust pipe and a drainage pipe; the arrow ground breaking drag resistance ring is arranged at the bottom of the cylinder wall; in the sinking process of the cylindrical foundation, edge wall cavity areas are formed on two sides of the edge wall of the cylindrical foundation at the upper part of the arrow ground breaking drag resistance ring; the lateral annular radial external impermeable pressure maintenance film is arranged out of the edge wall of the cylindrical foundation; the external impermeable pressure maintenance film is a multilayer geotechnical cloth material, the inner edge is sealed and anchored with the upper part of the edge wall of the cylindrical foundation through the cylinder wall anchor ring, and the outer edge is sealed and anchored with soil through the soil anchor ring; and the exhaust pipe and the drainage pipe are respectively arranged on a top cover of the cylindrical foundation. The cylindrical foundation sinking device for ground breaking drag resistance and pressure maintenance has the following advantages: the device adopts the arrow ground breaking drag resistance ring and the external impermeable pressure maintenance film to realize the capacity of drag resistance and pressure maintenance, not only can reduce the soil pressure in the sinking process, but also can guarantee the negative-pressure requirement in the sinking process, and in particular, is suitable for sinking a thin-wall cylindrical foundation.

Description

technical field [0001] The invention relates to the construction of an offshore wind power foundation structure, in particular to a cylindrical foundation device for breaking soil, reducing resistance and maintaining pressure, and a sinking method thereof. Background technique [0002] In recent years, the pace of offshore wind power development has gradually accelerated, and many offshore wind farms have been built in my country. For the development of offshore wind power, the design and construction of the basic structure is the most critical technical problem. [0003] At present, there are various forms of offshore wind power foundation structures, among which wide and shallow cylindrical foundations are more and more widely used in practical projects because of their good economy, structural characteristics and bearing capacity. However, due to the complex offshore environmental conditions and the diverse geological conditions of wind power sites, there are many challe...

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Problems solved by technology

However, due to the destructive effect of the soil breaking device on the soil during the subsidence of the soil, the soil cannot effectively contact the wall of the cylindrical foundation, and it is easy to form a cavity area on the wall

Once the negative pressure is extracted, the water will quickly flow into the cylindrical foundation along the wall cavity area, resulting in a loss of pressure, making it impossible to maintain the negative pressure state, and thus unable to ensure the negative pressure sinking operation of the cylindrical foundation

It can be seen that there is an obvious contradiction between the installation of the earth-breaking device and the negative pressure sinking, and this contradiction has not been effectively resolved so far

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