动载下桶形基础的沉陷
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摘要
对水平动载下桶形基础的响应进行了试验研究。考察了均匀土层情况下的沉陷现象。结果表明,由于动载的作用,桶周围土体逐渐软化甚至液化,土体强度降低,桶逐渐下沉。根据试验结果提出了1个简单的分析方法,并与试验结果进行了对比。
Physical model tests are carried out to study the responses of the bucket foundation under horizontal dynamic load.The subsidence of the bucket foundation and the uniform soil layers is investigated.It is shown that the soils around the bucket softens or even liquefies under the dynamic load.The strength of the soils degrades and the bucket sinks gradually.
Physical model tests are carried out to study the responses of the bucket foundation under horizontal dynamic load.The subsidence of the bucket foundation and the uniform soil layers is investigated.It is shown that the soils around the bucket softens or even liquefies under the dynamic load.The strength of the soils degrades and the bucket sinks gradually.
引文
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2 Aas P M,Andersen K H.Skirted foundation for offshore structure[A].In:Proc.of 9th Offshore South East Asia Conf.[C].Singapore:[s.n.],1992,1～7
3 Senpere D,Auvergne G A.Suction anchor piles-a proven alternative to driving or drilling[R].OTC4206,1982,483～493
4 Tjelta T L,Hermstad J,Andenaes E.The skirt piled gullfaks c platform installtion[R].OTC6473,1990,453～462
5 Bye A,Erbrich C,Earl K,et al.Geotechnical design of bucket foundation[C].OTC7793,1995,869～883
6刘振纹,王建华,秦崇仁等.负压桶形基础水平承载力研究[J].岩土工程学报,2000,22(6):691～695
7鲁晓兵,郑哲敏,张京来等.海洋平台吸力式基础的研究与进展[J].力学进展,2003,33(1):27～40
8徐志英,沈珠江.地震孔隙水压力产生、扩散和消散的有限单元法动力分析[J].水利学报,1981,9(4):1～16
9鲁晓兵,谈庆明,俞善炳等.垂向载荷下饱和砂土的液化发展的数值模拟[J].力学学报,2001,33(5):612～620
10 Biot M A.Theory of propagation of elastic waves in a fluid-saturated porous solid.I:low frequency range[J].J.Acoust.Soc.Am.,1956,28:50～62
11 Florin V A,Ivanov P L.Liquefaction of saturated sandy soils[A].In:Proc.of 5th Int.Conf.on Soil Mech.Found.Engrg.[C].Paris:[s.n.],1961,107～111
12 Scott R F.Solidification and consolidation of a liquefied sand column[J].Soils and Foundations,1986,26(4):23～31
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