Factors affecting the penetration resistance of suction bucket foundation of construction platform
In order to investigate the factors affecting the sinking penetration resistance of the suction bucket foundation of the guided frame platform,the mechanical property parameters of the soil and the structural parameters of the bucket were analyzed and studied by numerical simulation with the background of an offshore wind turbine foundation project in Guangdong.The results show that the angle of internal friction(φ)has the most significant influence on the penetration resistance,and when its value increases from 16°to 28°,the total resistance increases by 4 800 kN;the cohesive force(c)has the second most significant influence,and when its value increases from 20 kPa to 80 kPa,the total resistance increases by 2 500 kN;the length-to-diameter ratio and the thickness-to-diameter ratio have an influence on the penetration resistance,and in general,they show a tendency to increase with the increase in the length-to-diameter ratio and thickness-to-diameter ratio.The overall pemetration resistance increases with the increase in the L/D ratio and the thickness-to-diameter ratio.At about 2 m penetration,the penetration resistance was not changed by the change of the L/D ratio.The penetration resistance did not change significantly when the thickness-to-diameter ratio(t/D)was in the range of 0.006-0.036 and 0.042-0.048.The plastic penetration zone connecting the ground was not seen during the penetration process,the barrel sinking penetration in the soil was dominated by local shear damage,and the lateral friction resistance was dominant in the middle and late stages of the penetration.
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