When excavating a foundation pit, if the groundwater level is too high and is not lowered in time, it will not only worsen the construction conditions and cause soil wall collapse, but also affect the bearing capacity of the foundation. In severe cases, quicksand may even occur. Therefore, in earthwork construction, it is very important to carry out dewatering properly and keep the soil dry, which also improves working conditions. However, before dewatering, consideration should be given to the possible additional settlement and displacement of existing buildings and structures within the area affected by dewatering, which may cause cracking, tilting, and collapse, or cause ground subsidence. Effective protective measures should be taken in advance when necessary.