基础型式对均质岩坡—基础—上部结构共同作用影响分析

Influence of foundation type to rock slope subgrade-foundation-superstructure interaction

随我国山地城镇建设中,一些建筑需建于岩质边坡地基之上,建筑结构与岩坡地基之间的共同作用成为一个现实的研究课题。通过有限元数值分析的方法,对岩坡地基与上部结构及基础共同作用受力中基础型式的影响问题进行了计算分析,其中岩坡地基为10m高的直立边坡,上部结构为10层框架结构,基础型式考虑了独立基础、条形基础、筏形基础、桩基础4种情况。分析中上部结构、基础与岩坡地基满足三者的受力平衡和变形协调条件。研究了4种基础型式下考虑相互作用后的岩坡地基强度变形情况及上部框架结构及基础内力和变形情况,得出了一些有益的结论,对相关工程实践具有参考意义。

With the development of cities in mountainous areas,many buildings are situated on the rock slope subgrade.Interaction of rock slope subgrade and the superstructure becomes a realistic research task.By use of the finite element method,the foundation type influence to interaction of rock slope subgrade with foundation and superstructure is analyzed.The rock slope subgrade is a 10 m high vertical slope.The superstructure is a ten-story frame structure.Foundation is considered in individual foundation,strip foundation,raft foundation,and pile foundation separately.The interface of superstructure,foundation and slope subgrade are satisfied the force balance and the deformation continuous requirements.In four foundation type circumstances,strength and deformation development of the slope subgrade are researched.The internal force and deformation of raft foundation and superstructure are researched simultaneously.Some conclusions useful to the relative engineering practice are obtained.