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首页> 外文会议>International Symposium on Deepwater Mooring Systems: Deepwater Mooring Systems: Concepts, Design, Analysis, and Materials; 20031002-20031003; Houston,TX; US >Components of Suction Caisson Capacity Measured in Axial Pullout Tests
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Components of Suction Caisson Capacity Measured in Axial Pullout Tests

机译：轴向拉力测试中测量的沉箱容量的组成部分

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摘要

Laboratory experiments are being conducted to study the behavior of suction caissons used for deep offshore moorings. Results from nine caisson pullout tests were used to quantify the components of axial capacity. Tests with a 100-mm diameter caisson prototype, installed using dead weight or suction, were performed in a 1.1-m thick deposit of kaolinite. Large tanks of normally consolidated clay, selected to simulate common seafloor conditions, were prepared by consolidating a kaolinite slurry. Axial pullout tests were carried out on caissons inserted using dead weight only or dead weight plus suction pressure, on caissons pulled with a vented or sealed top cap, and with rapid (undrained) versus slow (drained) pullout. Measured axial capacities are interpreted in terms of the weight of extracted soil, side resistance on the caisson walls, and reverse end bearing capacity at the tip. For rapid pullout with a sealed top cap, the test results indicate an external side resistance factor (α) of 0.5 to 0.8 and a reverse end bearing factor (N'_c) of 13 to 21.
机译：目前正在进行实验室实验，以研究用于深海系泊的吸水沉箱的性能。来自九个沉箱拉拔试验的结果用于量化轴向承载力的分量。使用自重或吸力安装的直径为100毫米的沉箱原型进行的测试是在1.1微米厚的高岭石矿床中进行的。通过固结高岭石浆，制备了通常模拟为海底条件的大型固结粘土罐。对仅使用自重或自重加上吸力插入的沉箱进行轴向拉拔试验，对通过通风或密封顶盖拉拔的沉箱进行快速（不排水）对缓慢（排水）拉拔。测得的轴向承载力是根据提取的土壤重量，沉箱壁的侧向阻力和尖端的反向端承载力来解释的。对于带有密封顶盖的快速拔出，测试结果表明，外部电阻系数（α）为0.5到0.8，反向端轴承系数（N'_c）为13到21。

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