【作者】 李辉；

【导师】 张爱国；

【作者基本信息】 河北工业大学 ， 工程硕士（专业学位）， 2020， 硕士

【摘要】 随着国家对基础设施建设的加大投入,近些年来生产型企业的生产设施建设发展迅猛。原煤仓作为储存原煤的重要构筑物被普遍应用于选煤厂及火力发电厂,其基本功能是储存原煤,并使各个运输、使用环节能力相匹配,起到缓冲作用。加之目前国家对环境保护的要求越来越高,封闭式原煤仓的建设进入了一个高速的发展期。但近些年,各地不断的出现原煤仓在生产运营过程中发生了仓壁砼撕裂及破损等严重的质量事故,给企业的正常生产造成了巨大的影响及经济损失。为了避免类似质量事故的发生,国内很多专家学在原煤仓仓壁砼的施工工艺上做了很多深入的研究,滑模法施工工艺被普遍应用于原煤仓仓筒的建设,该工艺具有施工速度快、机械化程度高、成本低等特点。但原煤仓仓壁砼出现质量事故是受诸多因素的影响,不只是要改善滑模法工艺,而是要全面系统的分析问题,才能找到根本的原因。针对原煤仓仓壁砼的质量问题,本文基于项目风险管理理论,采用事故树分析法,从原煤仓的运营管理、前期设计、施工阶段的质量控制等方面对传统原煤仓建设的各个阶段进行质量风险分析和评估,并提出质量控制对策。经过分析评估发现:原煤仓仓壁砼出现开裂的具体成因有运营阶段的非正常使用,存在设计误差,施工中质量管控措施不到位等。这些风险点呈现出一种无法有效控制的态势,基于此,本文结合实际的工程案例提出了在设计阶段使用Midas软件进行三维模拟计算来复核设计成果,施工阶段改进滑模工艺、精确监测出模砼强度来控制施工速度等应对质量风险的对策,取得了比较好的效果并降低了成本。更多还原

【Abstract】 With the increasing investment in infrastructure construction,the production facilities construction of production-oriented enterprises has developed rapidly in recent years.As an important structure for storing raw coal,raw coal bunker is widely used in coal preparation plant and thermal power plant.Its basic function is to store raw coal and make the capacity of each transportation and use link match to play a buffer role.In addition,at present,the national requirements for environmental protection are higher and higher,the construction of closed raw coal bunker has entered a high-speed development period.However,in recent years,serious quality accidents such as concrete tearing and damage occurred in the process of production and operation of raw coal bunkers,which caused huge impact and economic loss to the normal production of enterprises.In order to avoid similar quality accidents,many domestic experts and scholars have done a lot of in-depth research on the construction technology of raw coal bunker wall concrete.The sliding mode construction technology is widely used in the construction of raw coal bunker barrel,which has the characteristics of fast construction speed,high mechanization degree and low cost.However,the quality accident of the concrete on the wall of the coal bunker is affected by many factors.It is not only to improve the slipform process,but also to analyze the problems comprehensively and systematically,so as to find the root cause.Based on the theory of project quality management and the method of fault tree analysis,this thesis analyzes and evaluates the quality risk of each stage of the construction of traditional coal bunker from the aspects of operation management,preliminary design and quality control in the construction stage,and puts forward the quality control countermeasures.Through analysis and evaluation,it is found that the concrete causes of cracking of raw coal bunker wall are abnormal use in operation stage,design error,inadequate quality control measures in construction,etc.These risk points present a kind of situation that can not be effectively controlled.Based on this,this thesis puts forward some countermeasures to deal with the quality risk,such as using Midas software to carry out three-dimensional simulation calculation to review the design results in the design stage,improving the slipform technology in the construction stage,accurately monitoring the strength of the formwork concrete to control the construction speed and so on,which have achieved good results and reduced the rcost.更多还原