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（北京城建設(shè)計(jì)發(fā)展集團(tuán)股份有限公司， 北京 100037）

［摘要］在安哥拉首都羅安達(dá)市及其周邊，淺部廣泛分布Quelo砂層，該Quelo砂層在浸水后力學(xué)性質(zhì)明顯變差，可能會(huì)發(fā)生濕陷性沉降，具有濕陷性。針對(duì)Quelo砂層地基處理和基礎(chǔ)設(shè)計(jì)進(jìn)行了研究分析，通過(guò)對(duì)換填墊層法地基處理的檢測(cè)試驗(yàn)，并選取具代表性的建筑實(shí)體進(jìn)行沉降觀測(cè)對(duì)比，證明了在羅安達(dá)市及其周邊的Quela砂區(qū)域，采用換填墊層法對(duì)地基進(jìn)行濕陷性處理的方法是可行的，也是安全有效的。

［關(guān)鍵詞］Quelo砂； 濕陷性； 換填墊層； 地基處理

中圖分類號(hào)：TU475+.3文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：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

作者簡(jiǎn)介：田予東，碩士，結(jié)構(gòu)工程師，Email：tianshelang11@163.com。