橡胶阻滑板与抛石基床摩擦系数统计特性与影响因素  

Statistical Feature of Friction Coefficient between Anti-Sliding Rubber Sheets and Rubble Mound Foundations and its Influencing Factors

作　　者：杜明宣[1] 李炎保[1,2] 

机构地区：[1]天津大学建筑工程学院,天津300072 [2]四川大学水力学与山区河流开发保护国家重点实验室,四川成都610065

出　　处：《中国港湾建设》2009年第5期4-6,44,共4页China Harbour Engineering

基　　金：国家自然科学基金(50779045);四川大学水力学与山区河流开发保护国家重点实验室开放基金(0710)

摘　　要：长江口工程北导堤NⅡB标段采用在半圆形沉箱底板设置橡胶阻滑板的方法提高沉箱与抛石基床之间摩擦系数,作为抗地基土动力软化的工程措施。利用该项目试验数据,分析橡胶阻滑板与抛石基床的摩擦系数的统计特性与影响因素。分析结果表明,同一基床应力下摩擦系数试验值的概率分布接近于正态分布,摩擦系数的总体平均变化趋势随基床应力的增加略有降低,但全部试验数据的统计假设检验不支持这一观点,摩擦系数随基床应力的变化规律需要进一步研究。In the north jetty segment numbered as NHB in the deepwater channel regulation project at Yangtze Estuary, a new engineering method that laying anti-sliding rubber sheet underneath the bottom of the semi-circular caissons was adopted to enhance the friction coefficient between the caissons and the rubble mound foundations. Based on the experimental data of this project, the statistical characteristics of that friction coeffcient and influence factors are analyzed. Analysis results show that the statistic distribution of friction coefficient is normal distribution for same stress in foundations. The variation tendency for population mean of friction coefficient shows a little decrease when stress increase in foundations. But it is not supported by the test of hypothesis for total experimental data of friction coefficient of anti-sliding rubber; the variation regularity of friction coefficient of anti-sliding rubber needs further studies.

关 键 词：橡胶阻滑板 摩擦系数 统计分布 基床应力 

分 类 号：U617.91[交通运输工程—船舶及航道工程] TU433[交通运输工程—船舶与海洋工程]