存在软弱夹层的高桩码头接岸结构地基稳定验算  

Foundation stability calculations for structure connecting shore of high piled wharf with weak intercalation

作　　者：寇本川[1] 苏航[1] 刘贻华 夏冬飞 KOU Ben-chuan;SU Hang;LIU Yi-hua;XIA Dong-fei(CCCC Water Transportation Consultants Co.,Ltd.,Beijing 100007,China)

机构地区：[1]中交水运规划设计院有限公司,北京100007

出　　处：《水运工程》2021年第7期199-204,230,共7页Port & Waterway Engineering

摘　　要：地基稳定验算是保证高桩码头接岸结构安全的重要步骤,而选用什么样的地基稳定验算方法至关重要。针对这个问题,结合工程案例,选用简单条分法和复合滑动面法进行抗力分项系数计算比较,并提出了软弱夹层处理方案。同时在原设计方案基础上,结合两种方法对软弱夹层关键参数黏聚力、内摩擦角和厚度进行敏感性分析,并对抗力分项系数进行了相关性分析。结果表明:存在软弱夹层的高桩码头接岸结构应同时采用简单条分法和复合滑动面法进行地基稳定验算;在同样变化率下,内摩擦角对抗力分项系数的影响明显高于黏聚力的影响;两种方法计算的抗力分项系数最小值在一定条件下具有高度相关性。结论可为类似条件下高桩码头接岸结构地基稳定验算提供一定的参考。Foundation stability calculation is an important step to ensure the safety of the structure connecting shore of the high piled wharf,and the choice of foundation stability calculation method is crucial.To solve this problem,we choose the Swedish slices method and composite sliding surface method for the comparison of resistance division coefficient calculation and propose a treatment scheme for weak interlayer.At the same time,based on the original design,the sensitivity analysis of the key parameters of the weak interlayers,such as cohesion,internal friction angle,and thickness,and the correlation analysis of the coefficient of frictional resistance,are combined with the two methods.The results show that two methods should be used for the foundation stability calculations;under the same rate of change,the influence of the internal friction angle resistance component coefficient is significantly higher than the influence of the cohesion force;the minimum values of the fractional coefficients calculated by the two methods are highly correlated.The conclusion can provide a reference for the foundation stability calculations under similar conditions.

关 键 词：高桩码头接岸结构 软弱夹层 简单条分法 复合滑动面法 敏感性分析 

分 类 号：U656.13[交通运输工程—港口、海岸及近海工程]