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Preparation of Soft Clay for Bearing Capacity of Model Tests and Study on Installation of Suction Caissons

Author: ZhaoYongXiang
Tutor: WangJianHua
School: Tianjin University
Course: Geotechnical Engineering
Keywords: Suction anchor Preloading Sidewall friction coefficient Capacity model test
CLC: TU43
Type: Master's thesis
Year: 2010
Downloads: 59
Quote: 1
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Abstract


Suction anchor is a new form the basis for offshore platforms . Despite already been applied in the world , but for suction anchor awareness is still not perfect , this paper carried out the following aspects: For suction anchor load characteristics for indoor model test , the first to be prepared to meet the test requirements of analog soil . To this end, two boxes of soft clay was prepared to simulate the actual engineering ground conditions , namely uniform soft clay increase with depth and intensity of the soft clay . In the soil preparation process, the soil surface subsidence and displacement were monitored in order to control the analog soil moisture . Cross plate test for determination of soil strength results are analyzed in detail . Secondly, carried out in a uniform suction anchors in soft clay penetration test . The test results are obtained : penetration resistance of the suction anchor , the desired penetration into the negative pressure , to allow negative pressure . On the suction anchor penetration process of a theoretical analysis, test results and theoretical results are compared to calculate the allowable negative pressure in good agreement with the experimental results . Aspect ratio than the calculated limit test result of 2.9% -19.2 % higher . The data obtained by experiment , on the side wall of the suction anchor backstepping friction coefficient : the weight of the penetration phase , the side walls between the coefficient of friction 0.12-0.19 ; penetration into the negative pressure phase , the sidewall friction coefficient 0.35 between -0.4 . Finally, the load characteristics of the suction anchor tests. With a diameter of 76mm and 114mm made ??of stainless steel tube with an aspect ratio of 6 and 4 model anchors. Respectively, in three different angles under tension bearing capacity test , and the test results were analyzed ; while the suction anchor tensioning angles at different failure modes were observed. In addition, the model test equipment, test process is also carried out a detailed introduction.

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CLC: > Industrial Technology > Building Science > Soil mechanics,foundation engineering > Soil Mechanics
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