摘要
结合上海市某重点工程,通过现场振冲试验,研究了振冲密实联合振动碾压法加固深厚粉细砂吹填土的适用性。在现场试验中,进行了水位测试、静力触探试验、振动碾压前后地表沉降观测和载荷板试验。研究了振冲时地下水位变化对振冲效果的影响,另外还对最优碾压遍数的确定进行了探讨。现场试验的结果表明,振冲密实联合振动碾压法可以应用在粉细砂的地基处理中,并可以取得很好的效果。
Vibroflotation compaction is a comparably mature method for the improvement of cohesiveless soils,but it is seldom used to strengthen silty fine sands without additional stone aggregates because of some failure case histories.In this paper,the in-situ tests were held to achieve the related characteristics of the silty fine sand.The groundwater level and cone penetration tests(CPT)were made to discover the relationship between the rising of groundwater table and the effect of vibroflotation.The optimal times selcting of vibrating roller compaction was also discussed.Based on the successful in-situ experiment in Shanghai,it is verified that vibroflotation combined with vibrating roller compaction is significantly efficient in strengthening silty fine sands.
出处
《工业建筑》
CSCD
北大核心
2005年第z1期451-453,共3页
Industrial Construction
关键词
振冲
振动碾压
水位
静力触探
载荷板试验
vibrofloation vibrating roller compaction groundwater level cone penetration test plate loading test
