CFG桩在地基处理中的应用

Application of CFG Pile in Foundation Treatment

塑性指数较大的砂土、粉土中采用碎石桩并在桩体中掺入适量的石屑、粉煤灰和水泥与适度的水拌和制成粘结强度较高的水泥粉煤灰碎石桩，形成复合地基取得较好效果．某工厂地基原承载力为80，100，90，160kPa不等，达不到设计要求，经采用水泥粉煤灰碎石核处理后复合地基承载力平均值达到224．8kPa。

Gravel pile ground stabilization has been used in the sand or silt which plasticityindex is high. If the gravel pile is mixed with appropriate content of stone slacks,fly-ash and ce-ment, and mixed with appropriate water to form the Cement Fly-ash Gravel pile(CFG) Whoseadhesive sterngth is very high, thus an effection composite ground will be acquire. For example,the former bearing capacities of subsoil of a factory are 80kPa, 100kPa, 90kPa and 160kPa from the surface to the bottom, which is inaccessible to the design demands. After the Cement Fly-ashGravel pile ground stabilization was utilized in it,the average value of the bearing capacity of sub-soil of the factory composite ground reached 224. 8kPa. It meeted the design demand 200kPa