Cylindrical foundation reinforcing method for offshore platform
A technology for cylindrical foundations and offshore platforms, which is applied in foundation structure engineering, foundation structure repair, construction, etc., and can solve problems such as difficulties in installation and penetration of cylindrical foundations
Inactive Publication Date: 2012-09-05
NEPTUNE OFFSHORE ENG DEV
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Problems solved by technology
Due to certain uncertainties in the geological survey, this brings risks to the installation of the cylindrical foundation. It is necessary to strengthen the cylindrical foundation to meet the requirements of the code for the compression and pullout resistance of the foundation
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[0009] Such as figure 1 As shown, first a steel pile 2 is driven into the manhole at the top of the cylindrical foundation 5, and after the steel pile 2 is driven in place, the pile-fixing sleeve 1 is set on the top of the steel pile 2, and the pile-fixing sleeve 1 The base 3 sits on the top cover of the cylindrical foundation 5 . Temporarily fix the pile-fixing sleeve 1 and the top cover of the cylindrical foundation 5 by electric welding. After the pile-fixing sleeve 1 is fixed, grout the gap between the tubular foundation 5 and the pile-fixing sleeve 1 and the steel pile 2. After the cement slurry 4 is solidified, the steel pile 2 can be combined with the tubular foundation 5 to provide The jacket provides load bearing capacity.
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The invention discloses a cylindrical foundation reinforcing method for an offshore platform. The method is characterized in that: a cylindrical foundation mainly provides anti-pressing and anti-pulling bearing capacity for the platform, a steel pile is driven into a manhole of the cylindrical foundation, the length of the steel pile extends out of one part of the top of the cylindrical foundation, and a pile fixing sleeve for solidification is arranged at the top of the steel pile. The pile fixing sleeve is in a tubular structure, the bottom of the pile fixing sleeve is provided with a base, the clearance between the pile fixing sleeve and the steel pile is filled by using cement paste, and the soil-free part of the interior of the cylindrical foundation is also filled by using the cement paste. The solidified pile fixing sleeve mainly transfers the pressure and the pulling force on the cylindrical foundation to the steel pile in the manhole of the cylindrical foundation. A shear key is arranged between the pile fixing sleeve and the steel pile, the cement paste and the shear key share the pressure on the cylindrical foundation together, the base at the bottom of the pile fixing sleeve is used for transferring the pulling force on the cylindrical foundation to the steel pile in the manhole, the paste needs to be filled into the base, and the paste and stiffening plates in the base share the load transferred by the cylindrical foundation together, so the problem of insufficient bearing capacity of the cylindrical foundation is solved.
Description
technical field [0001] The invention relates to an innovation of a cylindrical foundation strengthening method in the field of marine engineering. Background technique [0002] With the development of more and more marginal oil fields, the cylindrical foundation is more and more applied to offshore oil platforms due to its low construction cost and low installation cost. Due to certain uncertainties in the geological survey, this brings risks to the installation of the cylindrical foundation. It is necessary to strengthen the cylindrical foundation to meet the requirements of the code for the compression and pullout resistance of the foundation. Underwater reinforcement is difficult and costly, which makes the reinforcement of cylindrical foundations very difficult, and the reinforcement method in this patent can solve this problem well. Invention content: [0003] The technical problem solved by the present invention is to provide a method for strengthening the cylindri...
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IPC IPC(8): E02D37/00
Inventor 崔文涛
Owner NEPTUNE OFFSHORE ENG DEV