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[主观题]

如图所示，拟建场地的外缘设置6.2m高的挡土墙，场地土的内摩擦角为30°，若不允许把建筑物的基础置于

破坏楔体范围内，则对于平行于挡土墙的外墙基础，当基础宽度为2m、埋置深度为1.0m时，外墙轴线距挡土墙内侧的水平距离不应小于()。

A．3m

B．4m

C．2m

D．3.5m

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