无填料振冲法处理新近吹填粉细砂地基的工程应用

Application of Vibroflotation without Additional Backfill Materials in Treatment on Fine Silt Foundation of Recent Hydraulic Fill

唐山港曹妃甸港区煤码头二期(新近吹填区域)采用无填料振冲施工工艺对粉细砂地基进行处理,消除了地基液化,提高了承载力,减小长期地基变形。在大面积施工前,采取不同桩间距(2.2、2.5 m)进行试验,用标准贯入法检测,分析其地基承载力及液化消除情况,对大面积施工提供参考数据。

The fine silt foundation was treated with vibroflotation without additional backfill materials in coal terminal phase II（recent hydraulic fill area） of Caofeidian port area,Tangshan Port,the ground liquefaction was eliminated,the bearing capacity was improved and long-term foundation deformation was decreased.Before the large-scale construction,the tests were made in different pile spacing（2.2 and 2.5 m）,the detection was made by standard penetration method and the bearing capacity of foundation and liquefaction removing situation were analyzed to provide the reference data for large-scale construction.