At-sea composite foundation

A hybrid and basic technology, applied in infrastructure engineering, water conservancy engineering, artificial islands, etc., can solve the problems of difficult placement of cylindrical foundations and insufficient pull-out resistance, and achieve weight reduction, improved pull-out resistance, and reduced costs. Effect

Inactive Publication Date: 2008-09-03
NEPTUNE OFFSHORE ENG DEV
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  • Abstract
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  • Application Information

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Problems solved by technology

[0003] In order to solve the problems of difficulty in sinking and insufficient uplift capacity of the cylindrical foundation under

Method used

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Experimental program
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Embodiment Construction

[0014] Such as figure 1 As shown, the typical representative of the column-supported structure-the platform structure adopts a mixed foundation, and a mixed foundation is connected under 10 platform columns. In the case of high surface soil bearing capacity, the top surface of the mixed foundation is higher than the seabed mud surface 15, see image 3 .

[0015] Such as figure 2 As shown, the typical representative of the floating structure - the tension leg buoy structure adopts a mixed foundation, and each mixed foundation cylinder is connected by two anchor chains 13. When the bearing capacity of the surface soil is low, the mixed foundation Buried below the seabed mud surface 15 or flush with the seabed mud surface 15, see Figure 4 .

[0016] For the structure of the hybrid foundation, see image 3 , Figure 4 , Figure 5 box Figure 6 , the cylinder wall 1 and the center column 2 are connected to form an integral steel structure through a partition 3, an upper r...

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Abstract

A sea hybrid foundation is composed of a cylinder wall 1, a center column 2, a partition plate 3, an upper rib plate 4 and a lower rib plate 5. The invention is characterized in that the cylinder wall 1 and the center column 2 are connected to a whole steel structure through the partition plate 3, the upper rib plate 4 and the lower rib plate 5. The partition plate 3 divides the cylinder wall 1 to two cylinder cavities with one open end. The upper cylinder cavity is filled with fillers with larger specific weight, such as concrete 8. The lower cylinder barrel is homologous to a suction pile. The center column 2 and the inner part are arranged with a bottling pipeline 6 and a leveling pipeline 7. The lower end is respectively connected with the upper cylinder cavity and the lower cavity. The upper end of the bottling pipeline 6 is connected with the concrete pump on a construction supporting boat. The upper end of the leveling pipeline 7 extends to the construction supporting boat, is connected to the suction pump when the platform sinks and is connected to the mud injecting pump when the platform levels. The superiority of the invention is that a hybrid foundation form is provided for settling the problems of difficulty for sinking the cylindrical foundation and insufficient plucking resistance under the conditions of smaller water depth and higher bearing ability of topsoil. The invention also provides a settling plan for increasing the plucking resistance of the cylindrical foundation.

Description

technical field [0001] The invention belongs to the innovation of the basic type in the ocean engineering field. Background technique [0002] At present, the foundation types of offshore engineering structures include driven pile foundations, gravity foundations and barrel foundations, among which gravity foundations and barrel foundations are shallow foundations that utilize the bearing capacity of shallow soil. Gravity-based offshore structures rely on their own gravity acting on the seabed to maintain the stability of the offshore structure under the action of wind and waves. The contact surface between the foundation and the soil is relatively concentrated, so the bearing capacity of the surface soil is high; in order to increase the weight of the offshore structure, Gravity offshore structures generally adopt concrete structures with a large scale, so gravity foundations are suitable as the foundation of large offshore structures. The cylindrical foundation relies on ...

Claims

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Application Information

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IPC IPC(8): E02D27/52E02D27/32E02B17/00
CPCE02B2017/0078
Inventor 王翎羽
Owner NEPTUNE OFFSHORE ENG DEV
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