大型筒仓施工滑模系统安全性分析  

Safety analysis of sliding-form system for construction of large silo

作　　者：杨建华 谌磊 YANG Jianhua;CHEN Lei(State Grid Henan Energy Interconnection Power Design Institute,Zhengzhou 450001,China;College of Civil Engineering,Henan University of Technology,Zhengzhou 450001,China)

机构地区：[1]国网河南能源互联网电力设计院有限公司,河南郑州450001 [2]河南工业大学土木工程学院,河南郑州450001

出　　处：《武汉大学学报（工学版）》2020年第S01期288-292,共5页Engineering Journal of Wuhan University

摘　　要：近年来,工程建设中出现了多起由于施工过程中模板体系或脚手架体系出现问题而导致的工程事故。大型钢筋混凝土筒仓被广泛用作电力、粮食、矿产、水泥等储藏结构。目前筒仓施工常用的方法为滑模施工,滑模平台钢桁架跨度大,同时其自重和所承受的施工荷载较大,尤其是在风荷载较大地区,筒仓施工高度又很高时,滑模系统提升过程中存在一定的安全隐患。某海外海边电厂储煤筒仓施工过程中,考虑到工程所在地风速较大,滑模系统在大风极端天气时可能存在较大安全隐患,针对此问题,需对混凝土仓壁和滑模系统整体建模,对其提升过程中在风荷载作用下的稳定性进行有限元分析,对关键部位进行全过程监测,对整个系统进行安全评估,避免滑模系统施工过程中随着高度及风荷载的变化出现薄弱环节而存在安全隐患。In recent years,there have been many engineering accidents caused by problems of formwork system or scaffold system during the construction.Large reinforced concrete silos are widely used for grain,electricity,mineral,cement and other storage structures.The commonly used method of silo construction currently is sliding form construction.The span of the steel truss for the platform of the sliding system is normally very large,and its self-weight and the construction load are quite large.When the silo construction height is very high and the wind loading at the area whose project is significant,the safety risks cannot be neglected during the lifting process of the sliding system.This paper focuses on an oversea large silo project,the slip-form system and the concrete silo wall are modelled as a whole by using the finite element method,and the stability of the structural system under the wind loading are analyzed.The key parts are monitored during the construction process,and the safety of the whole system is evaluated to avoid the potential hazard during the sliding process with the construction height of the silo and wind load changes.

关 键 词：筒仓 滑模施工 有限元分析 风荷载 稳定性 

分 类 号：TU755.2[建筑科学—建筑技术科学]