【摘要】 通过轴对称有限元 -无穷元耦合分析 ,研究了水泥搅拌桩单桩、基础 -单桩以及基础 -砂垫层 -单桩的荷载传递规律 .分析结果表明 ,就沿桩身向下传递荷载的能力来说 ,水泥搅拌桩存在临界桩长 ,随桩土模量比的提高 ,有效桩长增大 ;在桩身上部桩土之间可以产生相对滑移 ,产生相对滑移的深度与桩土模量比有关 .砂垫层虽能增大桩间土分担比 ,但同时也降低了桩顶反力 .不必考虑常规厚度的砂垫层可能带来的负摩阻力更多还原

【Abstract】 Study on cement treated soil column,foundation with cement treated soil column and foundation-bedding sand-cement treated soil column is carried through the coupling method of infinite element and infinite element.Results showed that there is a critical length related to the load transferring,the critical length increased with the modular ratio of the column to soil.There is relative displacement between the upper part of the column and soil and is related to the modlar ratio of column to soil.Soil will carry more load while the column carry less when underlying layer is laid.Negative skin friction due to the bedding sand with routine thickness can be ignored.更多还原