Center-through cylindrical foundation and its installation process

Abstract

A kind of open-type cylindrical foundation and its installation process, comprising a cylindrical foundation body with a closed upper end and an open lower end, the top cover of which is closed at the upper end of the cylindrical foundation body is provided with a water pumping hole; an inner cylinder is set inside the cylindrical foundation body The inner cylinder wall is a vertical through-type structure. Its installation steps: 1. The operation ship sails to the construction site and locates; 2. Lifts the cylindrical foundation and positioning piles to the seabed; 3. Measures the horizontal condition of the cylinder top and adjusts the level; Under the mud surface; 5. Press the pile into the mud to a certain depth, and loosen the hydraulic transmission fastening device; 6. Start the pump to pump water to form a negative pressure, and the cylindrical foundation vertically penetrates into the mud surface along the pile; 7. Observe the data acquisition instrument until the cylindrical foundation penetrates to the design depth; 8. Take back the positioning pile and complete the installation. The invention can vertically penetrate into the soil layer to provide a stable working platform for production facilities; it can provide more bearing capacity; the installation process is simple and easy to operate.

Description

technical field [0001] The invention relates to a cylindrical foundation, in particular to a through-type cylindrical foundation used for the base of an underwater production system and an installation process, belonging to the field of offshore oil engineering. Background technique [0002] Barrel foundations are usually used as foundations for shallow sea fixed platforms, or foundations for subsea facilities. [0003] like figure 1 As shown, at present, the cylindrical foundation adopts a steel cylindrical structure with a closed upper end and an open lower end. A pumping hole is provided on the top cover of the cylinder with the closed upper end to connect the pumping pipeline. The construction process is as follows: first, it sinks into the seabed to a certain depth (initial mud entry depth) under the action of its own weight, forming a closed state of the water in the foundation; The water inside makes the amount of water pumped out at the same time greater than the ...

AI Technical Summary

Problems solved by technology

The cylindrical foundation is installed by hoisting and launching. In the deep sea environment, due to the use of too long suspension cables, it is impossible to accurately position the traditional cylindrical foundation due to the influence of waves and currents, and the cylindrical foundation cannot be guaranteed during the process of penetrating into the mud surface. The foundation penetrates smoothly; it is difficult to control the pressure inside the cylinder, so it is impossible to ensure whether the top surface of the cylinder foundation is horizontal

Images