设置基坑支护结构的船闸坞式闸室底板有限元分析  

Finite element analysis of docking chamber floor with foundation pit support

作　　者：吴梦娅 陈文 WU Meng-ya;CHEN Wen(CCCC Second Harbor Consultants Co.,Ltd.,Wuhan 430071,China)

机构地区：[1]中交第二航务工程勘察设计院有限公司,湖北武汉430071

出　　处：《水运工程》2018年第9期139-144,共6页Port & Waterway Engineering

摘　　要：闸室外部因没有足够的放坡空间,需设置支护减小开挖。目前国内外关于设有支护的复杂闸室结构计算甚少。因此,基于实际工程,分别使用弹性地基梁法和有限元法对2种闸室结构进行计算分析,研究支护对闸室底板内力的影响。计算结果表明:船闸闸室底板最大正、负弯矩分别发生在高水位期和检修期,支护的设置可减小闸室底板受力,提高结构安全性,达到优化大体积混凝土底板施工方法;不同材料的支护对闸室底板内力影响效果不同,地连墙支护对闸室底板内力影响效果高于钢板桩支护。Because there is not enough space,it is necessary to set the supporting structure to reduce excavation.At present,there is little study about complex lock chamber structure with supporting at home and abroad.Based on the practical engineering,this paper uses the elastic foundation beam method and the finite element method to analyze two kinds of chamber structures,and studies the influence on the internal force of the chamber floor caused by the support.The result shows that the maximum positive moment of the bottom plate of the lock chamber occurs at the high water level period and the maximum negative moment occurs at the overhaul period.The support can reduce the internal forces of the docking chamber structure floor and improve the safety of the structure to simplify the construction of the bottom plate.The effects of different materials on the internal force of the chamber bottom floor are different.The effect of the jointed wall support on the internal force of the floor is higher than that of the steel sheet pile.

关 键 词：闸室底板 基坑支护 弹性地基梁法 有限元法 

分 类 号：U641[交通运输工程—船舶及航道工程]