Plaxis在板桩结构分析中的应用  

Application of Plaxis in analysis of sheet-pile structure

作　　者：田利勇[1,2] 于文华 卢育芳 

机构地区：[1]同济大学,上海200092 [2]上海市水利工程设计研究院有限公司,上海200061

出　　处：《水运工程》2015年第4期194-200,共7页Port & Waterway Engineering

摘　　要：上海市某船闸引航道拟采用板桩结构,为选取合适的板桩结构形式,利用岩土工程有限元分析软件Plaxis对锚碇墙拉锚板桩结构、锚碇叉桩拉锚板桩结构、叉桩式高桩承台结构、直桩式高桩承台结构这4种不同板桩结构形式进行数值模拟分析,得出了各种板桩结构形式的结构位移变形、结构内力及桩侧土压力分布情况。计算成果显示：锚碇墙拉锚板桩结构和直桩高桩承台结构水平位移较大,达60~70 mm;叉桩高桩承台结构和锚碇叉桩拉锚结构在水平位移较小,约20 mm;叉桩高桩承台结构还具有卸荷作用,板桩所受主动土压力较小,板桩弯矩值最小。本项目宜采用叉桩高桩承台结构。The sheet-pile structure is used in a Shanghai ship lock. In order to choose appropriate solutions, we put forward the anchor sheet-pile by anchorage wall, anchor sheet-pile by inclined pile, inclined pile structure of elevated pile cap, and straight pile structure of elevated pile cap, and analyze the structures based on Plaxis finite element program. Through calculation, we get the structure＇s displacement and internal force and the distribution of earth pressure. The calculation results show that the horizontal displacement of the anchor sheet-pile by anchorage wall and straight pile structure of elevated pile cap structure reach 60 ~ 70 ram; the horizontal displacement of inclined pile structure of elevated pile cap and anchor sheet-pile by inclined pile structure are only about 20 mm; the inclined pile structure of elevated pile cap can also reduce the effect of earth pressure, the earth pressure on the sheet-pile is smaller, and the bending moment value of the sheet-pile is the minimum. Inclined pile-elevated pile cap is more suitable for this project.

关 键 词：PLAXIS 板桩 拉锚 叉桩 高桩承台 HSS模型 

分 类 号：U641.211[交通运输工程—船舶及航道工程]