非粘性土地基含淤泥包和夹层淤泥处理技术的分析  

Treatment technique analysis of cohesiveless soil ground containing bulk silt and interbedding silt

作　　者：秦志光[1] 鲍胜国 

机构地区：[1]中交四航工程研究院有限公司环境生态岩土工程研究所,广州510230 [2]广东天信电力工程检测有限公司,广州510600

出　　处：《工程勘察》2011年第5期16-21,共6页Geotechnical Investigation & Surveying

摘　　要：沙特红海地区RSGT项目场地吹填珊瑚礁非粘性土地基内局部分布淤泥包和成层、夹层淤泥,淤泥的性质较差且分布复杂,再加上工程远在海外,受施工条件限制所能够使用的地基处理方法很有限。为此,根据现场具备的施工条件,通过对岩土的性质和特点的分析,使用了水压振冲碎石桩联合强夯法处理深度小于14m的深厚淤泥包和较高夯击能的强夯法处理夹层淤泥的施工方法。通过试验检测结果,对碎石桩和珊瑚礁砂桩的成桩效果和强夯法加固夹层淤泥的加固效果进行了分析,证实所采取的措施取得了较好的加固效果,并对水压振冲碎石桩的施工和联合强夯法的使用提出了一些建议,为处理该地区同类地基的工程提供了参考经验。The cohesiveless coral reef soil ground formed by dredging and filling contains bulk silt and interbedding silt at some area of RSGT project near Red Sea in Saudi Arabia.The properties of silt is bad,and its distribution is complicated.Because the RSGT project is at the other side of the world,the machinery and equipment on quantity and variety to improve ground is restricted by policy or local conditions and so on.According to the equipment construction conditions at local area,and by way of analyzing the geotechnical properties and different geotechnical conditions,the hydraulic vibroflotation combined with dynamic compaction method is used to improve bulk silt,and dynamic compaction method with higher compaction energy is used to improve interbedding silt within 14m depth.According to test data,the effectiveness of different ground treatment is analyzed.The result of analysis shows that the used method had got good effectiveness.In addition,some advice about using of hydraulic vibroflotation combined with dynamic compaction method to improve deep silt is put forward.Some conclusions which could be used for same kind of soil ground treatment project at Red Sea area are summarized.

关 键 词：红海 珊瑚礁 非粘性土 淤泥包 夹层淤泥 水压振冲 强夯 

分 类 号：TU443[建筑科学—岩土工程]