本文選題：海洋基礎(chǔ)　切入點：動力錨　出處：《大連理工大學學報》2017年01期 　論文類型：期刊論文

【摘要】：動力安裝錨(簡稱動力錨)是一種依靠自重進行安裝、適用于深海錨泊系統(tǒng)的新型錨固基礎(chǔ).在動力沉貫過程中,土體經(jīng)受很高的剪應變率(約25s-1),因此必須考慮土體率效應影響.總結(jié)了以往關(guān)于土體率效應的研究成果,整理了常用3種率效應模型中參數(shù)的取值范圍,采用運動微分方程研究了不同率效應模型參數(shù)對動力錨沉貫深度的影響.結(jié)果表明:土體率效應會造成動力錨的沉貫深度顯著減小,可偏小30%~40%;當率效應參數(shù)較大時,錨的沉貫深度對參考應變率的變化比較敏感;摩擦項與端承項的率效應比值對動力錨的沉貫深度影響較大,需要進一步研究該比值的確切取值方法;給出了可以滿足任意形狀和深度的矩形基礎(chǔ)承載力計算公式.
[Abstract]:Dynamic installation anchor (abbreviated as dynamic anchor) is a new type of anchor foundation for deep-sea mooring system, which is installed by self-weight. Soil is subjected to very high shear strain rate (about 25s-1g), so the influence of soil rate effect must be taken into account. The results of previous researches on soil mass rate effect are summarized, and the range of parameters in the three commonly used rate effect models is sorted out. The effects of the parameters of different rate effect models on the penetration depth of dynamic anchors are studied by using the motion differential equation. The results show that the soil mass ratio effect can significantly reduce the penetration depth of the dynamic anchors, which can be slightly reduced by 30% and 40%, and when the parameters of the rate effect are larger, The penetration depth of the anchor is sensitive to the change of the reference strain rate, the ratio of the friction term to the end bearing item has a great influence on the penetration depth of the dynamic anchor, so it is necessary to further study the exact value of the ratio. A formula for calculating the bearing capacity of rectangular foundation with arbitrary shape and depth is given.
【作者單位】： 大連理工大學海岸和近海工程國家重點實驗室;上�？睖y設(shè)計研究院有限公司;
【基金】：國家自然科學基金資助項目(51479027;51539008)
【分類號】：U653.2

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