厦门大学学报（自然科学版）2018，Vol.57Issue(1)：144-148,5.DOI:10.6043/j.issn.0438-0479.201705030
管棚保护下框架桥顶进工程高程控制分析
Analyses on Elevation Control of Bridge Shield Tunneling Proj ect
摘要
Abstract
The direct jacking technology under the protection of pipe shed is very strict to the control of subgrade deformation,and there is little related research on the theories at home and abroad.Based on the actual engineering situation,the mechanics analysis model is established to calculate the force of the steel pipe under the frame bridge.According to the stress condition of the steel pipe, the steel pipe is assumed to be the Winkler elastic foundation beam.Based on the beam theory,the differential equation of steel pipe is established,and which is solved to calculate the deflection deformation of the steel pipe during the jacking process of the frame bridge,and then the height deviation of the frame bridge during the jacking process is determined.The theoretical analysis shows that the support and guidance of the bottom pipe shed contribute to the advance of the frame bridge and can effectively curb the phenome-non of "sink" and "rise" of the frame bridge.During the process of frame bridge advancement,the control about the phenomenon of "rise" very important.With the increase of the length of the frame bridge,it can gradually curb the the phenomenon of the "rise" of the frame bridge.关键词
框架桥/管棚/桥式盾构/Winkler弹性地基梁Key words
box culvert/tube shed/bridge shield/Winkler elastic foundation beam分类
交通工程引用本文复制引用
李庶林,李凯,黄玉仁,陈东霞,张昱..管棚保护下框架桥顶进工程高程控制分析[J].厦门大学学报（自然科学版）,2018,57(1):144-148,5.基金项目
福建省自然科学基金(2014J01208) （2014J01208）
