摘要
以山西某工程为例 ,运用有限元方法 ,对GC桩和CFG桩组合型复合地基的变形特性进行了数值模拟研究 ,得出了以下几个主要结论 :(1 )桩土的沉降变形差别不大 ,表现为复合地基的整体下沉 ,下卧土层的压缩量占据主导地位 ;(2 )合理布置桩的组合类型尤其是CFG桩 ,既利用CFG桩的承载性能 ,又可利用其“护桩”性能 ,使得提高复合地基承载力的同时 ,降低复合地基周围地表的隆起 ;(3)组合型复合地基中超孔隙水压力的消散较单一碎石桩复合地基稍慢 ,决定了该类复合地基的固结变形稳定时间较长 ,如何充分利用GC桩的排水特性 。
FEM is applied to make numerical simulation research for deformation properties of a ternary combined composite ground in this paper,with the example of some buildings in Shanxi Province,the following results are concluded:(1)“Integerity subsidence” is obvious.Subsidence discrepancy of piles and soils is small,and subsidence of lying soils is dominant; (2) In order to reduce circumambience upheaval of treated area and increase ground bearing capacity,it is important to arrange the piles of combination type;(3) Decreasing of super pore pressure in CCG is slower than that in GC ground,which results in a long consolidation time,further research should be carried out to apply the catchment properties of GC piles.
出处
《工业建筑》
CSCD
北大核心
2000年第10期52-55,共4页
Industrial Construction
