摘要
斜顶桩驳岸结构是一种深水高桩码头接岸结构型式,驳岸结构后进行高回填将是一个复杂的被动桩与土相互作用的问题。采用平面有限元方法,分别建立了后支撑和前支撑斜顶桩驳岸结构的桩-土相互作用模型,桩基采用梁单元模拟,桩-土界面采用接触对进行模拟,进行了高回填施工过程的仿真分析。将承台侧向位移的数值计算结果与原型观测值进行了比较,吻合较好,并对桩身侧向位移、板桩前后土压力以及位移场进行了分析。结果表明:结构的变形随着施工过程进行而变化,承台最大侧向位移发生在施工过程中;不同驳岸结构的被动土压力分布相似,而主动土压力由于支撑桩的位置不同而有所差别;后支撑桩的桩身挠度相对较大。研究结论可为此类结构的设计及计算提供参考,也可为深水港结构型式的优化提供建议。
Inclined pile bulkhead is a type of bank-linking structures being used for deep water wharf supported by high pile. The high filling behind the bulkhead is related to a complex problem about the passive pile-soil interaction. The plane FEM is used to set up the pile soil interaction models respectively for the back-supporting pile bulkhead and the fore supporting one. The pile base is simulated by the beam element, and the pilesoil interface by the contact pairs to analyze the simulated process of the high-filling works. The results from the numerical calculation for the platform lateral displacement are compared with the observational results for the phototype. The both are consistent. The lateral displacement of the piles, the soil pressure on the both sides of the sheet piles, and the displacement field are analyzed. It shows that the structure deformation varies in the filling process and the maximum lateral displacement of the platform appears in the process. The passive soil pressure distributions of the different bulkheads are similar. The active soil pressure depends upon the vertically supporting pile position. The deflection of the back-supporting pile is bigger. Those conclusions might provied references for the design and the calculation of the similar structures and be used as suggestions to optimize the sturctures in deep water ports.
出处
《海岸工程》
2009年第4期11-19,共9页
Coastal Engineering
基金
湖南省交通科技创新项目--株洲航电枢纽风化深槽基础处理的研究(200128)
关键词
斜顶桩驳岸结构
高回填
土压力
有限元
施工仿真
inclined pile bulkhead
high filling
earth pressure
FEM
construction simulation
