试题与答案

某厂房地基为软土地基,承载力特征值为90kPa。设计要求复合地基承载力特征值达140

题型:单项选择题

题目:

某厂房地基为软土地基,承载力特征值为90kPa。设计要求复合地基承载力特征值达140kPa。拟采用水泥粉煤灰碎石桩法处理地基,桩径设定为0.36m,单桩承载力特征值按340kN计,基础下正方形布桩,根据《建筑地基处理技术规范》(JGJ 79—2002)有关规定进行设计,桩间土承载力折减系数取0.80,问桩距应设计为()。

A.1.15 m

B.1.55 m

C.1.85 m

D.2.25 m

答案:

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