An Analysis Of Soil Soften Of Bucket Foundation Caused By Seepage And It's Influence To Penetration Resistance

As a new style foundation of platform and a system of anchoring mooringbuoys, the bucket foundation is paid more and more attention to for itspeculiarity such as its low weight,easy installation and it can be usedrepeadly etc. Because the history of its emergence and development is nottoo long, there are many technological problems that need furtherinvestigated. This text directs to this foundation form, carrys onresearch of the soil soften results form soil grains lost due to seepagefield during the bucket foundation penetration and the influence of theresistance affected by the soil soften, anlysises the range and the degreeof soil soften affected by the seepage field and the resistance spanvariation range influced by the soil soften and draws correspondingconclusions.During the construction period of the bucket foundation penetrates,the suction dynamic pressure becomes higher and higher with thepenetration becames deeper and deeper, this text makes analyses of therelative factors of the resistance in theory;calculates the seepage fieldin different penetration phrases by finite element method;summarizes thecharacteristic of the bucket foundation seepage field;determines therange of soil soften in different phrase by the microscopic analysis ofthe water-soil action using the speed and gradient calculated earlier;determines the degree of soil soften by the variety of the soil'sphysical index after soil soften combines the basic theories of soilmechanics;at last carries on the computational analysis of thepenetration resistance, compares the resistances between differentphrases: before and after softenning inside, outside and tip of the bucketfoundation respectively, pointes out their functions playing in totalresistance and the influence degree of the soil soften to the resistance;summarizes the research results of this thesis, points out the researchdirection in the future directs to the key problem in the bucket foundationconstruction that how to reduce the penetration resistance.The research achievement of this paper can make certain guidance andreference value combining with actual projects.