某工程采用不过水土石围堰,基坑上游围堰挡水位为30m,下游围堰挡水位为29.4m,上下游水位差为0.6m,波浪爬高为0.5m,安全超高为1.Om,该工程上...

作者: tihaiku 人气: - 评论: 0
问题 某工程采用不过水土石围堰,基坑上游围堰挡水位为30m,下游围堰挡水位为29.4m,上下游水位差为0.6m,波浪爬高为0.5m,安全超高为1.Om,该工程上游围堰堰顶高程至少应为()
选项 A:31.Om B:31.5m C:31.6m D:32.1m
答案 B
解析 上游围堰的堰顶高程由下式决定:Hu=hd+Z+ha+δ,式中:Hu—上游围堰的堰顶高程(m);hd—下游水位高程;ha—波浪爬高;δ—围堰的安全超高;z—上下游水位差(m)。所以上游围堰堰顶高程=29.4+0.6+0.5+1.0=31.5(m)。

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