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位置：首页 >> 期刊文章
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摘要：
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运用有限元分析程序,重点分析了荷载在超长水泥土搅拌桩桩身的传递规律,桩身强度、复合地基面积置换率、上部荷载作用面积、桩顶垫层刚度及桩径等参数对桩身附加应力的影响。计算结果表明,超长水泥土搅拌桩在桩身强度较高或大面积荷载情况下,桩顶荷载可以传递到桩体下部,水泥土搅拌桩的“有效桩长”概念宜进行调整;大面积荷载下宜采用刚度较大的垫层(如碎石或土工复合垫层),水泥土强度有保证时,宜采用低面积置换率等。
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Finite element analysis software is applied to emphatically analyze the pattern of transmission of load along the body of very long cement-soil mixed columns and the influence of parameters like the strength of column shaft,area displacement ratio of a composite foundation,area of loading from the top,stiffness of cushion on top of columns and diameter of columns upon the additional stress in the column body.The result of the analysis indicates that when the strength of the very long cement-soil mixed columns is very high or the load is applied on a vary large area,the loads from the top can be transmitted down to the lower part of the columns and it is advisable to modify the concept of"effective length"of cement-soil mixed columns.Cushion layer with higher rigidity(such as aggregate cushions or geosynthetics cushions) should be used when under the load of a large area.It is also advisable to adopt a lower area displacement ratio when the strength of the soil-cement mixture is warranted.
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基金项目：
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广东省交通厅资助科技项目(2002-05)
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作者简介：
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参考文献：
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[1]曹名葆.水泥土搅拌法处理地基[M].机械工业出版社.2004.41-42.
[2]段继伟,龚晓南,曾国熙.水泥搅拌桩的荷载传递规律[J].岩土工程学报,1994,16(4).
[3]何开胜,徐立新.超长搅拌桩的荷载传递特征[J].建筑结构,2000,30(5):17-19.
[4]刘和元,刘松玉.超长水泥土搅拌桩复合地基性状研究[J].东南大学学报,1999,29(2):63-69.
[5]郑刚,王长祥,顾晓鲁.软土中超长水泥搅拌桩复合地基承载力研究[J].岩土工程学报,2002,24(6):675-679.
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