集装箱荷载下港口吹填地基数值模拟分析  

Numerical simulation analysis of reclaimed port ground under container load

作　　者：赖汉江[1] 郑俊杰[1] 甘甜[1] 周燕君[1] 袁静波[2] 

机构地区：[1]华中科技大学土木工程与力学学院,湖北武汉430074 [2]中交第四航务工程勘察设计院有限公司,广东广州510230

出　　处：《岩土工程学报》2013年第S2期528-531,共4页Chinese Journal of Geotechnical Engineering

基　　金：国家自然科学基金项目(51278216);交通运输部水运工程建设项目

摘　　要：吹填造陆是沿海地区解决建设用地的一种重要手段,而目前对于港口吹填地基在集装箱荷载下受力变形特性的研究鲜有报道。采用FLAC3D建立了与现场试验工况一致的数值模型,铺面结构采用理想弹性模型,地基采用M-C模型。模拟主要对地基中的附加应力、竖向应变及侧向位移进行深入分析,模拟结果表明:中粗砂垫层应力扩散能力比淤泥质黏土层好;加载区域内地基中附加应力沿深度方向逐渐减小且最大侧向位移发生在淤泥质黏土层顶部;加载区域外地基中附加应力沿深度方向呈逐渐增加趋势且最大侧向位移发生位置呈增加趋势。最后,对中粗砂垫层和淤泥质黏土层回弹模量进行了参数分析。Land reclamation is an important way in solving the land-scarce issue for construction in coastal areas. The stress and deformation properties of reclaimed port ground under the action of container load are insufficiently studied. A numerical simulation is conducted using FLAC3D to establish a full-scale model as the field test conditions. The pavement is simulated by the elastic model and the ground is simulated by the M-C model. The additional stresses, vertical strains and lateral displacements are analyzed. The simulated results show that the ability of stress dispersion of medium-coarse sand is better than that of mucky clay. Within the loading region, the additional stress decreases with the increase of depth, and the maximum lateral displacement occurs at the top of mucky clay. Outside the loading region, the additional stress slightly increases with the increase of depth, and the location of the maximum lateral displacement gradually goes deeper. Finally, parametric studies on the elastic modulus of medium-coarse sand and mucky clay are presented.

关 键 词：港口 软土地基 附加应力 变形 数值模拟 

分 类 号：TU449[建筑科学—岩土工程]