（北京城建设计发展集团股份有限公司， 北京 100037）

［摘要］在安哥拉首都罗安达市及其周边，浅部广泛分布Quelo砂层，该Quelo砂层在浸水后力学性质明显变差，可能会发生湿陷性沉降，具有湿陷性。针对Quelo砂层地基处理和基础设计进行了研究分析，通过对换填垫层法地基处理的检测试验，并选取具代表性的建筑实体进行沉降观测对比，证明了在罗安达市及其周边的Quela砂区域，采用换填垫层法对地基进行湿陷性处理的方法是可行的，也是安全有效的。

［关键词］Quelo砂； 湿陷性； 换填垫层； 地基处理

中图分类号：TU475+.3文献标识码：A文章编号：1002-848X(2016)24-0066-04

Research on replacement cushion foundation treatment and foundation design of collapsible Quelo sand area in Angola

Tian Yudong, Zhao Wei, Song Yiping, Xu Dong, Ye Fei

(Beijing Urban Construction Design & Development Group Co., Ltd., Beijing 100037, China)

Abstract:In Luanda, the capital of Angola, and its surrounding area, Quelo sand is widely distributed. The mechanical properties of Quelo sand get worse after immersion in water and it may occur collapsible settlement with showing collapsibility. Foundation treatment and foundation design of collapsible Quelo sand were analyzed. The tests were made on replacement cushion method of foundation treatment, and settlement observation comparison was conducted on selected representative buildings. It is proved that it is feasible to use the replacement cushion method for foundation treating on collapsible soil in Quela sand area of Luanda and its surroundings, and it is safe and effective.

Keywords:Quelo sand; collapsibility; replacement cushion; foundation treatment

作者简介：田予东，硕士，结构工程师，Email：tianshelang11@163.com。