薛  祥，  于  玮，  沈  滨，唐建华
(北京市勘察设计研究院有限公司，北京100022)

[摘要] 湿陷性黄土地区地基与基础的变形控制问题是这一地区高层建筑地基与基础设计的关键问题之一。以变形控制设计的地基处理方法是保证工程安全、满足规范及优化地基基础设计的新理念。根据地基与基础的共同作用分析原理，采用SFIA系统，通过对兰州石化总医院医疗综合楼换填、分区加固等地基处理后的变形分析，建议了湿陷性黄土地区地基处理与基础变形控制设计的一般工程实践方法：以地基处理方法提高地基承载力、减小地基沉降量及消除黄土的湿陷性；根据地基与基础共同作用计算分析地基处理后基础的沉降和差异沉降，必要时实施变刚度调平设计的地基处理方案。
[关键词] 湿陷性黄土；地基处理；高层建筑；变形控制；地基与基础；共同作用分析

Subsoil and Foundation Interaction Analysis of High-rise Building on Collapsible Loess with Complicated Foundation Treatment
Xue Xiang, Yu Wei, Shen Bin, Tang Jianhua
( BCI Engineering Consultants LTD., Beijing 100022, China)

Abstract: It is a key problem how to calculate and control the settlement of high-rise building on collapsible loess. The method that the subsoil treatment and foundation design according to the settlement request is a new and rational innovation to satisfy code's requirements, insure building safety, and optimize design. Based on the theory of subsoil and foundation interaction analysis, the SFIA soft, developed by the BGI Engineering Consultants LTD, has been employed to calculate the settlement of the medical-technique integrated building of Lanzhou Petrochemical General Hospital, which subsoil of the building was treated by the methods of cushion and strengthening and so on. Based on the calculated results, a new practical method for subsoil treatment and settlement control on collapsible loess of foundation design is introduced. In order to improve the bearing capacity of ground, reduce settlement and differential settlements, and loess on eliminating collapsibility, the foundation treatment method is indispensable. According to the results of subsoil and foundation interaction analysis, if necessary, the variable rigidity design method for balance settlement should be adopted.
Keywords: collapsible loess, foundation treatment, high-rise building; settlement control, subsoil and foundation; interaction analysis