摘要
解决超长混凝土结构抗裂问题的主要方法是设置温度及沉降后浇带,但后浇带留设导致施工缝清理凿毛困难,钢筋锈蚀,影响后道工序的开展,且后浇带处于悬臂状态,荷载增加会给结构质量造成风险。以某高铁站站房及配套综合交通枢纽工程中承轨层(标高258 m)为例,应用Midas三维有限元模型数值模拟方法,对跳仓法的抗放结合技术原理进行分析,探讨采用跳仓法取代后浇带的可行性。
The main means to solve the crack resistance problem of super-long concrete structures is to set the temperature and settle the post-casting belt.However,the remaining of the post-casting belt also brings many problems to the construction of the structure,including the difficulty of cleaning the construction joint,the corrosion of the steel bar in the post-casting belt,the influence of the development of the post-casting process,cantilevered post-casting belt,and the increase of the load in the post-casting belt in the cantilever state,which will bring risks to the structural quality.Through taking the rail bearing layer(elevation 258 m)in a high-speed railway station building and supporting comprehensive transportation hub project as an example,the study applies Midas three-dimensional finite element model numerical simulation method to conduct quantitative analysis of the anti-release combination technology principle of the bin hopping method,and discusses the feasibility of replacing the post casting belt with the jumping warehouse method.
作者
舒亮
Shu Liang(Passenger Station Construction Headquarters,China Railway Chengdu Bureau Group Co.,LTD.,Chengdu 610000,China)
出处
《黑龙江科学》
2023年第22期112-114,共3页
Heilongjiang Science
关键词
超长混凝土结构
跳仓法
后浇带
有限元模型
数值模拟
Super long concrete structure
Jumping warehouse method
After pouring belt
Finite element model
Numerical simulation
