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【Daily Discussion】Utilities - Civil Engineering - 20210311

2021-03-11View Original

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When the soil is uniform, the humidity is normal, there is no groundwater within the excavation area, and the exposure time is short, it is possible to excavate shafts or trenches made of relatively compact sand or gravel without the need for support, provided that the excavation depth does not exceed ( ). Choose one: A. 1.50m B. 1.25m C. 2.00m D. 1.00m Feel free to participate actively in the discussions; the system offers generous rewards for answering questions from VIP members! ! !

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