某钢筋混凝土料仓纠偏加固技术方案的研究与实践  

Research and practice of rectification and reinforcement scheme of large span reinforced concrete silo

作　　者：喻岩[1] 张裕 

机构地区：[1]石家庄铁道大学土木工程学院,河北石家庄050043 [2]中铁建工集团,北京010000

出　　处：《空间结构》2014年第3期75-81,共7页Spatial Structures

摘　　要：以某铝冶炼厂上料仓为研究对象,分析了导致某铝冶厂3#、4#料仓倾斜的原因,提出了用共同作用分析方法研究顶升纠偏的思路.依据结构协同作用的有限元分析原理,模拟了由于不同顶升方法产生不同工况下结构内力分布情况,对该工程的纠偏加固方案进行了全面分析,提出了在整个托换施工、断柱、接柱恢复过程中,以任意一构件达到设计承载力作为纠偏工程的极限状态.分析了顶升过程中托换梁的刚度对上部结构的影响,对托换梁进行了优化设计.同时研究了纠偏过程中,相邻柱的允许差异顶升量、顶升速度、各重点监测范围.通过分析研究给出了一套合理的现场顶升纠偏加固技术方案,实践表明效果良好,对今后建筑物纠偏加固提供了一种行之有效和切实可行的方法.Taking one aluminum smelter as the research object, the causes of inclination of 3 # silos and 4 silos are analyzed and the interactive analysis method is proposed to study lift-up and rectification problems. According to the principle of finite element analysis considering structural synergy, structural internal force distribution with different jacking methods and under different load conditions is simulated. In the meantime, the rectification and reinforcement solution for the project is comprehensively analyzed and it is proposed that the limit state of the rectification and reinforcement emerges when any component reaches its design load-carrying capacity in the whole process of underpinning, constructing, column breaking and fixing. In addition, the impact of the underpinning beam stiffness on upper structure during the process of lifting is analyzed to optimize the design of underpinning beam. The allowed jacking quantity difference between adjacent columns, lifting speed and the key monitoring areas are also studied. In conclusion, a reasonable on-the-spot lift-up and rectification technical solution is given through analysis and proved effective in practice, which is an effective and practical method for rectification and reinforcement of buildings.

关 键 词：顶升纠偏 托换 差异顶升量 极限状态 

分 类 号：TU375[建筑科学—结构工程]