In the course of the use of services there may be a variety of inadequate conditions. The period without water after completion of the building is before construction and u se, the vertical load is the largest and easiest to sink or inevitably sink. The design stability calculation should be taken into account the expiry period, the designed combination of water levels, the combination of water levels and the earthquake situation. Projective seismic intensity is 7 degrees, and seizures should also be considered.The combination of the water-free period and the water-free project is based on a combination of loads, and the control level of water and seismic are special combinations. Find the details in Table 6-1.