| 筒型桩靴在饱和砂土中的贯入阻力研究 |
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| 引用本文： | 吴曲楠,刘润,张海洋,王宇飞.筒型桩靴在饱和砂土中的贯入阻力研究[J].西北地震学报,2018,40(6):1183-1190. |
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| 作者姓名： | 吴曲楠 刘润 张海洋 王宇飞 |
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| 作者单位： | 天津大学 水利工程仿真与安全国家重点试验室, 天津 300072,天津大学 水利工程仿真与安全国家重点试验室, 天津 300072,天津大学 水利工程仿真与安全国家重点试验室, 天津 300072,天津大学 水利工程仿真与安全国家重点试验室, 天津 300072 |
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| 摘 要： | 桩靴贯入阻力的准确预测是自升式钻井平台安全作业的前提。通过小比尺模型试验,研究饱和砂土中桩靴贯入速度对筒型桩靴插桩性能的影响,并基于地基承载力理论提出筒型桩靴贯入阻力的计算方法,进而采用CEL有限元方法模拟筒型桩靴的贯入过程,并与试验结果进行比较。研究发现:当模型试验中桩靴贯入速度在0.1～0.3mm/s时,桩靴的贯入可看作是准静态过程,此时贯入阻力变化不大,采用基于地基承载力理论中的Hansen公式和Vesic公式可较为准确地计算出对应某一深度的贯入阻力;CEL有限元方法可有效模拟筒型桩靴的贯入过程,当桩靴的贯入速度为0.1～0.3mm/s时,数值模拟结果与试验结果吻合较好。
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| 关 键 词： | 筒型桩靴 贯入速度 贯入阻力 模型试验 CEL |
| 收稿时间： | 2017/8/20 0:00:00 |
Bucket Spudcan Penetration Resistance in Saturated Sand |
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| WU Qu''nan,LIU Run,ZHANG Haiyang and WANG Yufei.Bucket Spudcan Penetration Resistance in Saturated Sand[J].Northwestern Seismological Journal,2018,40(6):1183-1190. |
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| Authors: | WU Qu'nan LIU Run ZHANG Haiyang and WANG Yufei |
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| Institution: | State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, Tianjin 300072, China,State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, Tianjin 300072, China,State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, Tianjin 300072, China and State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, Tianjin 300072, China |
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| Abstract: | The accurate prediction of spudcan penetration resistance plays an important role in the safety of work on Jack-up drilling platforms. In this work, by carrying out small-scale model tests, the influence of penetration speed on the pile-penetration performance of bucket spudcans in saturated sand was studied, and a computational formula for calculating the bucket spudcan penetration resistance was developed based on the bearing capacity of the ground. Subsequently, the penetration process of the bucket spudcan was simulated by the coupled Eulerian-Lagrangian (CEL) finite element method, and the results were compared with test results. The investigation results showed that, when the penetration speed of the spudcan is 0.1~0.3 mm/s in the model test, the penetration process of the bucket spudcan can be regarded as a quasi-static process, and the penetration resistance varies little. The penetration resistance of the bucket spudcan at a certain depth can be calculated accurately by using the Hansen and Vesic formulas. The CEL finite element method can simulate the bucket spudcan penetration process exactly, and the simulation results were in good agreement with the test results when the penetration speed of the spudcan was 0.1~0.3 mm/s. |
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| Keywords: | Bucket spudcan penetration speed penetration resistance model test CEL |
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