当下沉到沉井顶面离地面1~ 2m时,如还要下沉,就需接筑沉井,每节沉井高度以 ( )m为宜。A. 1 ~2 B. 2 ~3 C. 3~6 D. 2~6

作者: rantiku 人气: - 评论: 0
问题 当下沉到沉井顶面离地面1~ 2m时,如还要下沉,就需接筑沉井,每节沉井高度以 ( )m为宜。 A. 1 ~2 B. 2 ~3 C. 3~6 D. 2~6
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答案 D
解析 当下沉到沉井顶面离地面1 ~2m时,如还要下沉,就应接筑沉井,每节沉井高度以2?6m为宜。接筑的沉井中轴线应与底节井中轴线重合。为防止沉井在接高时突然下沉或倾斜,必要时应在刃脚下回填。

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