考虑地基弹性约束的地下超长混凝土顶板裂缝控制研究

Study on Cracking Control of Underground Super-Long Concrete Roof Considering Elastic Constraint of Foundation

对于地下超长混凝土结构,顶板的裂缝控制显得尤为重要。论文针对地下超长混凝土结构的底板施加弹簧约束,分析了不同弹簧刚度约束情况下的温度应力变化情况。结果表明,通过减小地基土对筏板的摩擦约束,可以显著减小温度应力,同时,对地下超长混凝土结构裂缝控制措施进行了总结归纳。

For underground ultra long concrete structures,crack control of the top plate is particularly important.In this paper,the variation of temperature stress under different spring stiffness constraints is analyzed for the base plate of underground super-long concrete structure.The results show that the temperature stress can be significantly reduced by reducing the friction constraint of the foundation soil on the raft.At the same time,the crack controlmeasures of underground super-long concrete structures are summarized.