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。
2
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.