What is cfg composite foundation?
CFG pile is a kind of pile with high bonding strength, which is made by adding proper amount of stone chips, fly ash and cement into the pile and mixing with water. CFG pile composite foundation is formed with soil between piles and cushion.
General situation of cfg composite foundation;
CFG pile is a kind of pile with high bond strength. The only difference between CFG pile and alkali pile lies in the different composition of pile materials, and there is no difference in their stress and deformation characteristics. The performance and design calculation of composite foundation are also applicable to other composite foundations with high bond strength piles. CFG pile can be applied to strip foundation, independent foundation, raft foundation and box foundation. As far as soil quality is concerned, CFG pile can be used for filling, saturated and unsaturated cohesive soil, as well as soil with good compaction effect and soil with poor compaction effect. CFG pile is the abbreviation of cement fly ash gravel pile, which is made of gravel, stone chips (sand) and fly ash mixed with appropriate amount of cement and water and pumped by CFG pile in a long spiral drill pipe. Using the viscosity of CFG pile, stress in the whole length range, friction around the pile, end bearing capacity and vertical and horizontal bearing capacity of soil between piles, a composite rigid foundation with the same force is formed. It has the characteristics of small settlement and fast stability.
CFG pile can be used to reinforce filled soil, saturated and unsaturated cohesive soil, loose sand and silt. The use of saturated soft clay with high plasticity index should be cautious.
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