| 摘要: |
| 通过平面拉动法分别测量了5 种不同开口比人工鱼礁礁体模型对5 种不同粒径大小底质间的最大静摩擦系数, 分析了不同粒径底质以及礁体不同开口比的最大静摩擦系数变化规律。试验研究表明:最大静摩擦系数与底质粒径大小呈强负相关(r=?0.964, P<0.01); 控制底质粒径时, 最大静摩擦系数与礁体质量呈弱负相关(r=?0.265, P<0.01), 与礁体开口比呈弱正相关(r=0.245, P<0.01); 礁体本身的设计属性如开口比是最大静摩擦系数的主要影响因子。对于新设计礁型在进行礁体稳定性校核时, 应根据礁体开口比和实际海域底质泥沙的粒径组成, 选取适当的最大静摩擦系数。 |
| 关键词: 人工鱼礁 摩擦系数 沉积物 粒径 |
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| 基金项目:上海市教委优秀青年基金(0701701); 上海市教委科研创新项目(09YZ272); 国家公益性行业(农业)科研专项经费项目(201003068) |
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| Analysis of the maximum static friction coefficient of artificial reefs in different diameter of sediment |
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| Abstract: |
| In the examination of the artificial reefs’ stability the coefficient of maximum static friction between the reef and the sediment in seabed is a basic and important parameter, the value of which is commonly fixed from previous experience. Based on the method of horizontal drag, the max static friction coefficient between 5 types of artificial model reefs with different opening rate and 5 different sediments are examined. Through a series of experiment, the relationship between different grain-size of sediments and different opening rate is analyzed in this paper. The results show that (1) the max static friction coefficient and the grain-size of sediments are in a strong negative correlation (r=?0.964, P<0.01); (2) when controlling the grain-size of sediments, the max static friction coefficient is negatively correlated with the weight (r=?0.265, P<0.01) and positively correlated with the opening rate of reefs (r=0.245, P<0.01); (3) the primary factors influencing the max static friction coefficient are the property of reef itself, such as the opening rate of reefs. During the stability estimation of the new designed artificial reefs, the designer can select a proper max static friction coefficient based on both the opening rate and the survey of actual ocean area's composition of sediments. |
| Key words: artificial reef friction coefficient sediments grain-size |
