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A Calculation Method of Horizontal Bearing Capacity of Skirt Suction Bucket Foundation

A technology of suction barrel foundation and horizontal bearing capacity, which is applied in the test of foundation structure, foundation structure engineering, construction, etc., can solve the problems of immature theoretical analysis and structural calculation, stagnation, and lack of actual engineering technical data, etc., and achieve formal Easy to use, good accuracy, clear analysis effect

Inactive Publication Date: 2021-05-07
SHANGHAI UNIV
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Problems solved by technology

This kind of basic development has a good prospect, but the relevant research is still in the stage of indoor model test, the theoretical analysis and structural calculation are not yet mature, and there is no relevant actual engineering technology data to refer to

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  • A Calculation Method of Horizontal Bearing Capacity of Skirt Suction Bucket Foundation
  • A Calculation Method of Horizontal Bearing Capacity of Skirt Suction Bucket Foundation
  • A Calculation Method of Horizontal Bearing Capacity of Skirt Suction Bucket Foundation

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Embodiment Construction

[0026] Specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0027] The diameter and height of the main barrel of a project foundation are 240cm and 480cm respectively, the wall thickness of the barrel is 4cm, the thickness of the foundation roof is 20cm, the skirt width and skirt height are 100cm and 120cm respectively. The foundation soil is dense sea sand with a weight of 18kN / m 3 , the internal friction angle is 30.8°.

[0028] Such as figure 1 As shown, a method for calculating the horizontal bearing capacity of skirt-type suction bucket foundations, the implementation steps are as follows:

[0029] 1) Determine the size parameters of the skirt-type suction barrel foundation structure, the radius of the main barrel d 1 =2.4m, barrel skirt radius d 2 =1m, height of main barrel L=4.8m, height of barrel skirt L 1 = 1.2m;

[0030] 2) The measured saturated weight γ' of the foundation soil is 18kN...

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Abstract

The invention relates to a method for calculating the horizontal bearing capacity of skirt-type bucket-shaped suction foundations that can be used in actual engineering. Formula calculation steps: (1) Determine the size parameters of the bucket foundation structure. (2) Measure the saturated weight γ' of the foundation soil. (3) Determine the coefficient of friction f between the barrel and the soil from the direct shear test of the material and the soil. (4) Determine the horizontal foundation coefficient k according to the "m" method h . (5) Calculate the Rankine active earth pressure coefficient K a . (6) Calculate the sum V of the vertical forces acting on the barrel base. (7) Utilize the formula of the present invention to calculate the rotation angle ω when the barrel foundation is in the horizontal limit bearing state, and substitute the calculated ω value into the calculated value P of the barrel foundation limit horizontal load. (8) Design value P of bucket foundation ultimate horizontal load u =αP(α<0.75), where α is the safety factor. The invention has clear analysis on the horizontal bearing mode of the skirt-type suction bucket foundation, and the simplification is reasonable, and the obtained calculation formula of the horizontal bearing capacity is simple and easy to use, and has good accuracy.

Description

technical field [0001] The invention relates to a method for calculating the horizontal bearing capacity of a skirt-type suction bucket foundation, which is applied to marine engineering and belongs to the technical field of marine engineering anchoring foundations. Background technique [0002] The suction bucket foundation is a new type of foundation used in offshore engineering. It is a cylindrical thin-walled structure with an open lower end and a closed upper end. During construction and installation, the negative pressure in the bucket is formed by pumping water to achieve sinking. After the installation is completed, the bucket The negative pressure inside can play the role of anti-pull bearing, and can use the soil reaction force and friction to provide horizontal bearing capacity. This new type of foundation has been widely adopted in recent years due to its advantages of simple construction, high efficiency and low cost. [0003] The skirt-type suction barrel foun...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D33/00
CPCE02D33/00
Inventor 姚文娟徐旭陈雷远
Owner SHANGHAI UNIV
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