摘要
从南宁某工程实例观察到的现象出发,分析了勘察期与基坑、基础工程施工期对软土性质的影响因素,认为勘察期的钻探工艺、试验方法等通过对软弱土结构的损伤对土进行扰动,且扰动程度比较大,弱化了软土的力学性质,而施工期的降水开挖及基础工程桩设置增强了软土的力学性能。并结合具体工程对基础桩基设置对软土的效应进行了三点载荷试验研究,试验结果与上述分析一致。从现象与试验两个角度说明:南宁工程界对软土特性与利用还有待于研究。
Form the phenomena of an engineering case, factors were analyzed to affect properties of soft soils during site investigation and deep pit excavation processes, Methods of drilling borehole and laboratory test disturbed structures of soft soils, and the strength of soft soils was depressed. While the strength of soft soils was increased after driving piles and excavation with the groundwater drop during construction. Three static plate loading tests were finished on soft soil ground. The test results are in agreement with the above analysis. From the engineering case and field tests, soft soils in Nanning should be particularly studied by engineers.
出处
《岩土工程学报》
EI
CAS
CSCD
北大核心
2006年第B11期1885-1888,共4页
Chinese Journal of Geotechnical Engineering
基金
教育部科技研究重点项目(【2003】77号)
广西自然科学基金资助项目(0447001)
广西自然科学基金资助项目(0249010)
广西自然科学基金资助项目(0575019)
广西科学研究与技术开发计划(0632006-1B)
广西水利厅科技项目[【2004】4号]
关键词
地层
深基坑
工程桩
软土
南宁
soil layer
deep pit
base pile
soft soil
Nanning