| 杭州湾粉质土动强度特性研究 |
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| 引用本文： | 叶银灿,来向华.杭州湾粉质土动强度特性研究[J].海洋科学,2003,27(2):56-59. |
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| 作者姓名： | 叶银灿 来向华 |
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| 作者单位： | 国家海洋局第二海洋研究所 杭州 310012 |
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| 摘 要： | 通过对杭州湾海底浅层粉土动强度的研究 ,发现动强度指标内摩擦角Cd 为静强度的39.7 %左右 ,同时动强度与固结比Kc、振动频率 f关系密切。当Kc 较小时 ,动强度随Kc 的增大而增大 ,但Kc>1.5后 ,动强度曲线平缓且有降低的趋势 ;在振动次数较小 (<22次 )时 ,f=0.2Hz的粉土表现出较高的动强度 ,振动次数较大后 ,曲线变化复杂 ,这可能与试样两端的透水石发生共振有关 ,但均在30～50次振动范围内出现峰值后破坏。
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| 关 键 词： | 杭州湾 粉质土 动强度特性 固结比 振动频率 |
| 文章编号： | 1000-3096(2003)02-0056-04 |
| 收稿时间： | 2002/8/30 0:00:00 |
| 修稿时间： | 2002年8月30日 |
DYNAMIC STRENGTH CHARACTERISTICS OF SILT IN THE HANGZHOU BAY |
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| YE Yin-Can,LAI Xiang-Hua.DYNAMIC STRENGTH CHARACTERISTICS OF SILT IN THE HANGZHOU BAY[J].Marine Sciences,2003,27(2):56-59. |
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| Authors: | YE Yin-Can LAI Xiang-Hua |
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| Abstract: | Through research on dynamic strength characteristics of silt in shallow layers of Hangzhou bay, we find that the inter frictional angle of dynamic strength is about 39.7% on static strength's. Dynamic strength has closed relation to consolidation ratio (Kc) and vibration frequency (f), when the value of Kc is below 1.5, with increasing of Kc, the dynamic strength of silt changes in the same trend, but when Kc>1.5, the curves of dynamic strength present gently and decveasingly tendency; when vibration numbers are below 22, and f=0.2 Hz, dynamic strength gets higher; and when vibration numbers are more, the curves of dynamic strength are complex. This is likely because of the resonance of soil sample and the filters. But the samples are all failed when they are vibrated 30 to 50 times. |
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| Keywords: | Silt Dynamic-strength Consolidation ratio Vibration frequency |
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