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首页> 外文期刊>Ocean Engineering >Consolidation of unsaturated seabed around an inserted pile foundation. and its effects on the wave-induced momentary liquefaction
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Consolidation of unsaturated seabed around an inserted pile foundation. and its effects on the wave-induced momentary liquefaction

机译：插入桩基础周围的非饱和海底固结。及其对波致瞬时液化的影响

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摘要

Seabed consolidation state is one of important factors for evaluating the foundation stability of the marine structures. Most previous studies focused on the seabed consolidation around breakwaters standing on the seabed surface. In this study, a numerical model, based on Biot's poro-elasticity theory, is developed to investigate the unsaturated seabed consolidation around a nearshore pile foundation, in which the pile inserted depth leads to a different stress distribution. Seabed instabilities of shear failure by the pile self-weight and the potential liquefaction under the dynamic wave loading are also examined. Results indicate that (1) the presence of the inserted pile foundation increases the effective stresses below the foundation, while increases and decreases the effective stresses around the pile foundation for small (de/R < =3.3) and large (de/R > 3.3) inserted depths, respectively, after seabed consolidation, (2) the aforementioned effects are relatively more significant for small inserted depth, large external loading, and small Young's modulus, (3) the shear failure mainly occurs around the inserted pile foundation, rather than below the foundation as previously found for the located marine structures, and (4) wave-induced momentary liquefaction near the inserted pile foundation significantly increases with the increase of inserted depth, due to the change of seabed consolidation state.
机译：海床固结状态是评估海底结构基础稳定性的重要因素之一。先前的大多数研究都集中在位于海床表面的防波堤周围的海床固结。在这项研究中，建立了一个基于Biot孔隙弹性理论的数值模型，以研究近岸桩基周围的非饱和海床固结，其中桩的插入深度导致了不同的应力分布。还研究了桩的自重引起的海床剪切破坏的不稳定性和动波荷载作用下的潜在液化。结果表明：（1）插入的桩基础的存在会增大地基以下的有效应力，而对于小（de / R <= 3.3）和大（de / R> 3.3）的桩基础，有效应力会增大和减小。 ）分别是在海床固结之后的插入深度，（2）对于较小的插入深度，较大的外部载荷和较小的杨氏模量，上述影响相对更为显着，（3）剪切破坏主要发生在插入的桩基周围，而不是如先前为所定位的海洋结构所发现的那样，地下（4）由于海床固结状态的变化，插入桩基础附近的波浪引起的瞬时液化随着插入深度的增加而显着增加。

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  • 来源
    《Ocean Engineering》 |2017年第1期|308-321|共14页
  • 作者

    Sui Titi; Zheng Jinhai; Zhang Chi; Jeng Dong-Sheng; Zhang Jisheng; Guo Yakun; He Rui;

  • 作者单位

    Hohai Univ, State Key Lab Hydrol Water Resources & Hydraul En, Nanjing, Jiangsu, Peoples R China|Hohai Univ, Coll Harbour Coastal & Offshore Engn, Nanjing, Jiangsu, Peoples R China;

    Hohai Univ, State Key Lab Hydrol Water Resources & Hydraul En, Nanjing, Jiangsu, Peoples R China|Hohai Univ, Coll Harbour Coastal & Offshore Engn, Nanjing, Jiangsu, Peoples R China;

    Hohai Univ, State Key Lab Hydrol Water Resources & Hydraul En, Nanjing, Jiangsu, Peoples R China|Hohai Univ, Coll Harbour Coastal & Offshore Engn, Nanjing, Jiangsu, Peoples R China;

    Griffith Univ, Cities Res Ctr, Griffith Sch Engn, Gold Coast Campus, Nathan, Qld 4111, Australia;

    Hohai Univ, State Key Lab Hydrol Water Resources & Hydraul En, Nanjing, Jiangsu, Peoples R China|Hohai Univ, Coll Harbour Coastal & Offshore Engn, Nanjing, Jiangsu, Peoples R China;

    Hohai Univ, State Key Lab Hydrol Water Resources & Hydraul En, Nanjing, Jiangsu, Peoples R China|Univ Bradford, Sch Engn, Bradford BD7 1DP, W Yorkshire, England;

    Hohai Univ, State Key Lab Hydrol Water Resources & Hydraul En, Nanjing, Jiangsu, Peoples R China|Hohai Univ, Coll Harbour Coastal & Offshore Engn, Nanjing, Jiangsu, Peoples R China;

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  • 正文语种 eng
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  • 关键词

    Seabed consolidation; Pile foundation; External loading; Wave; Momentary liquefaction;

    机译：海床固结;桩基;外部荷载;波浪;瞬时液化;

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