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注:地(路)面基层的偏差只适用于直接在挖填方上做地(路)面的基层。vô-ÐÃvXÃcbbs.3c3t.comJðÕú!¾Â¥
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注:1、符合下列情况之一。为一级基坑:vô-ÐÃvXÃcbbs.3c3t.comJðÕú!¾Â¥ 1)vô-ÐÃvXÃcbbs.3c3t.comJðÕú!¾Â¥ 重要工程或支护结构做主体的一部分;vô-ÐÃvXÃcbbs.3c3t.comJðÕú!¾Â¥ 2)vô-ÐÃvXÃcbbs.3c3t.comJðÕú!¾Â¥ 开挖深度大于10m;vô-ÐÃvXÃcbbs.3c3t.comJðÕú!¾Â¥ 3)vô-ÐÃvXÃcbbs.3c3t.comJðÕú!¾Â¥ 与临近建筑物,重要设施的距离在开挖深度以内的基坑;vô-ÐÃvXÃcbbs.3c3t.comJðÕú!¾Â¥ 4)vô-ÐÃvXÃcbbs.3c3t.comJðÕú!¾Â¥ 基坑范围内有历史文物、近代优秀建筑、重要管线等需严加保护的基坑;vô-ÐÃvXÃcbbs.3c3t.comJðÕú!¾Â¥ 2、三级基坑为开挖深度小于7m,且周围环境无特别要求时的基坑。vô-ÐÃvXÃcbbs.3c3t.comJðÕú!¾Â¥ 3、除一级和三级外的基坑属二级基坑。vô-ÐÃvXÃcbbs.3c3t.comJðÕú!¾Â¥ 4、当周围已有的设施有特殊要求时,尚应符合这些要求。vô-ÐÃvXÃcbbs.3c3t.comJðÕú!¾Â¥
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