摘要
针对安哥拉罗安达省南部Kilamba Kiaxi区某一营地Quelo砂地层进行低能级(1000kN·m、2000kN·m)强夯加固处理,在场地内分别开展标准贯入、重型动力触探及平板载荷试验等原位试验,并结合其它场地平板载荷试验结果对罗安达Quelo砂地基承载力进行了分析,结果表明:含水率变化对罗安达Quelo砂力学性质影响显著,天然条件下,当含水率大于4%时,罗安达Quelo砂地基承载力随着含水率的增高而显著降低;强夯法处理罗安达Quelo砂地基效果明显,夯后地基承载力至少是夯前的5倍,夯后浸水条件下,承载力较夯前提高4～11倍;罗安达Quelo砂力学性质对水极其敏感,地基基础设计时应充分考虑含水率对地基承载力的影响。
With low energy level(1000 kN·m, 2000 kN·m) the dynamic compaction method was used to reinforce for a certain camp with Quelo sand stratum in the Kilamba Kiaxi area of the southern Luanda Province of Angola. The in-situ tests such as SPT, DPT(N63.5) and PLT were carried out in this testing area and the bearing capacity of the Quelo sand foundation in Luanda was analyzed by combining with the results from PLT in other Quelo sand regions. The results show that the change of moisture content has a significant influence on the mechanical properties of the Luanda Quelo sand, and the mechanical properties will become worse after soaking; the bearing capacity of the Quelo sand foundation in Luanda is significantly reduced with the increase of the moisture content under natural conditions when the moisture content is greater than 4%; the effect of the dynamic compaction method on the treatment for the Quelo sand foundation in Luanda is obvious, and the bearing capacity of the foundation after reinforcing is at least 5 times before reinforcing. The bearing capacity increases for 4 to 11 times than that before the treatment under immersion conditions. The mechanical properties of the Quelo sand in Luanda are extremely sensitive to water, and the influence of moisture content on the bearing capacity of foundation should be fully considered in foundation design.
作者
刘智
祝伯学
唐国艺
郑建国
刘争宏
姜文
Liu Zhi;Zhu Boxue;Tang Guoyi;Zheng Jianguo;Liu Zhenghong;Jiang Wen(China JIKAN Research Institute of Engineering Investigations and Design,Co.,Ltd.,Xi'an 710043,China;Shaanxi Key Laboratory for the Property and Treatment of Special Soil and Rock,Xi'an 710043,China;"Sanqin Scholar"Post Research and Innovation Team,Xi'an 710043,China;CITIC Construction Co.,Ltd.,Beijing 100027,China)
出处
《工程勘察》
2018年第12期16-20,共5页
Geotechnical Investigation & Surveying
基金
科技部科技伙伴计划资助项目(KY201502002)
