| 桩靴连续贯入过程的动态模拟方法研究 |
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| 引用本文： | 周龙,刘润,郭绍曾,彭碧瑶.桩靴连续贯入过程的动态模拟方法研究[J].西北地震学报,2015,37(2):460-466. |
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| 作者姓名： | 周龙 刘润 郭绍曾 彭碧瑶 |
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| 作者单位： | 天津大学水利安全与仿真国家重点试验室;港口岩土工程技术交通行业重点实验室 |
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| 基金项目： | 国家重点基础研究发展计划(973计划)(2014CB046800);国家自然科学基金优秀青年基金(51322904);天津市自然科学基金面上项目(12JCYBJC4700) |
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| 摘 要： | 采用CEL方法(耦合的欧拉-拉格朗日分析法)对比研究桩靴下沉速度不同对计算结果的影响,分析不同桩靴下沉速度下附近桩基础的响应,研究质量放大方法的适用性。结果表明:无桩时桩靴贯入速度不同对土体阻力影响较小,土体的破坏形态和剪应力水平略有不同;桩靴贯入速度对桩身水平位移影响较小,桩靴贯入速度越大,桩身最大应力越小;质量放大系数的增加对桩身最大位移的影响较小,但对桩身最大应力有较大影响,因此建议谨慎使用质量放大方法。
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| 关 键 词： | 桩靴 桩基础 贯入速度 质量放大 |
| 收稿时间： | 2014/8/20 0:00:00 |
A Dynamic Simulation Method for Continuous Spudcan Penetration |
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| ZHOU Long,LIU Run,GUO Shao-zeng and PENG Bi-yao.A Dynamic Simulation Method for Continuous Spudcan Penetration[J].Northwestern Seismological Journal,2015,37(2):460-466. |
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| Authors: | ZHOU Long LIU Run GUO Shao-zeng and PENG Bi-yao |
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| Institution: | ZHOU Long;LIU Run;GUO Shao-zeng;PENG Bi-yao;State Key Laboratory of Hydraulic Engineering Simulation and Safety,Tianjin University;Key Laboratory of Port Geotechnical Engineering,Ministry of Transport; |
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| Abstract: | The CEL method,which is widely used in the research on spudcan penetration,is a new simulation method.However,there are many questions which have not been answered,especially about the effect of penetration velocity and the mass scaling method.This paper firstly simulates two models with no piles which have different penetration speeds.Then,two models with square piles are also simulated with different penetration speeds.Additionally,the mass scaling method is verified.The simulation results show that the penetration speed has little effect on the soil resistance and more effect on the soil failure mode and shear stress.When the model has a pile,the horizontal displacement is relatively unaffected by the penetration speed,and the Mises stress of the pile increases with the penetration speed.The mass scaling factor also has little effect on the horizontal displacement of the pile.The Mises stress has an irregular relation to the mass scaling factor.Therefore,caution should be carefully taken when the mass scaling method is used. |
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| Keywords: | spudcan pile foundation penetration speed mass scaling |
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