In the deep footing groove maintenance construction and, the pole pressure in the soil near to the top of the ground, with the going on of the excavation process, will increase gradually.
对深基坑围护结构，靠近地表的土体，随着施工中土体开挖深度的增加和开挖范围的推进，桩体土压力是在逐渐的增加的；
By certain construction method, footing groove excavation and the constructions of permanent structures will be completed under the protection of the supporting structures.
通过一定的施工方法，在支护结构保护下完成基坑开挖及永久建筑物施工。
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