The main danger in high-rise construction lies in the deep depth of foundation digging, the great height of work place, the much crossover work, the long time for a project.
高层建筑施工存在危险的主要方面有：基础开挖深度深、作业高度高、交叉作业多、施工工期长。
According to theoretical calculate and water surge and lithology condition when digging into 3 coal, the maximal height of the crack strap is not attach to Quaternary alluvium.
通过理论计算以及3层煤开采涌水及打钻过程中所记录的岩性和钻孔涌水方面的情况来看，裂隙带高度并未达到第四系。
According to theoretical calculate and water surge and lithology condition when digging into 3 coal, the maximal height of the crack strap is not attach to Quaternary alluvium.
通过理论计算以及3层煤开采涌水及打钻过程中所记录的岩性和钻孔涌水方面的情况来看，裂隙带高度并未达到第四系。
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