基于API規(guī)范的海上大直徑鋼管樁靜壓載試驗分析
發(fā)布時間：2018-10-14 15:02
【摘要】：大直徑鋼管樁在海洋工程建設中的使用越來越廣泛。海上大直徑鋼管樁試樁周期長、難度大,相關(guān)測試數(shù)據(jù)及研究成果較為少見。本文基于美國石油行業(yè)協(xié)會API規(guī)范,分析了某海上風電大直徑鋼管樁靜壓載試驗數(shù)據(jù),研究了樁側(cè)阻力與樁端阻力隨壓荷載變化關(guān)系。結(jié)果表明,對于本文分析的海上大直徑鋼管樁,其土塞狀態(tài)一般為不完全閉塞,計算抗壓極限承載力時應計入樁管內(nèi)側(cè)摩阻力;樁側(cè)摩阻力隨壓荷載增大而逐漸發(fā)揮,相同荷載作用下,無黏性土地層側(cè)摩阻力發(fā)揮程度較黏性土高;樁端土體破壞分為彈性變形與塑性變形兩個階段,兩階段端阻發(fā)揮程度分別可達約50%和80%,當樁端產(chǎn)生0.05d位移時,樁體達到極限平衡狀態(tài)。
[Abstract]:Large diameter steel pipe piles are widely used in ocean engineering. The test period of large diameter steel pipe pile at sea is long and difficult, and the relevant test data and research results are rare. Based on the API code of American Petroleum Industry Association, the static load test data of a large diameter steel pipe pile in offshore wind power are analyzed, and the relationship between pile side resistance and pile tip resistance with compressive load is studied. The results show that the soil plug state of the large diameter steel pipe pile analyzed in this paper is generally not completely closed, and the internal friction of the pile pipe should be taken into account when calculating the ultimate bearing capacity of the pile, and the friction resistance of the pile side gradually develops with the increase of the compressive load. Under the same load, the exertion degree of lateral friction of non-viscous soil layer is higher than that of clay soil, and the soil failure of pile end is divided into two stages: elastic deformation and plastic deformation, the exertion degree of end resistance in the two stages can reach about 50% and 80% respectively, when the pile end produces 0.05d displacement, The pile reaches the limit equilibrium state.
【作者單位】： 中國電建集團浙江華東建設工程有限公司;中國電建集團華東勘測設計研究院有限公司;
【基金】：中國華能集團公司總部科技項目海上風電場工程建設關(guān)鍵技術(shù)研究與應用(HNKJ16-H25-01)資助~~
【分類號】：P75;TU473.1
本文編號：2270823
[Abstract]:Large diameter steel pipe piles are widely used in ocean engineering. The test period of large diameter steel pipe pile at sea is long and difficult, and the relevant test data and research results are rare. Based on the API code of American Petroleum Industry Association, the static load test data of a large diameter steel pipe pile in offshore wind power are analyzed, and the relationship between pile side resistance and pile tip resistance with compressive load is studied. The results show that the soil plug state of the large diameter steel pipe pile analyzed in this paper is generally not completely closed, and the internal friction of the pile pipe should be taken into account when calculating the ultimate bearing capacity of the pile, and the friction resistance of the pile side gradually develops with the increase of the compressive load. Under the same load, the exertion degree of lateral friction of non-viscous soil layer is higher than that of clay soil, and the soil failure of pile end is divided into two stages: elastic deformation and plastic deformation, the exertion degree of end resistance in the two stages can reach about 50% and 80% respectively, when the pile end produces 0.05d displacement, The pile reaches the limit equilibrium state.
【作者單位】： 中國電建集團浙江華東建設工程有限公司;中國電建集團華東勘測設計研究院有限公司;
【基金】：中國華能集團公司總部科技項目海上風電場工程建設關(guān)鍵技術(shù)研究與應用(HNKJ16-H25-01)資助~~
【分類號】：P75;TU473.1
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