Pier thickness: The thickness of the pier must meet the stability requirements and strength requirements, the thickness of the middle pier is 1.0m, and the thickness of the side pier is 1.0m. The size of the plane gate slot should be determined according to the size of the gate. The maintenance door slot is 0.2m deep and 0.3m wide, and the main door slot is 0.30m deep and 0.5m wide. Maintain a clear distance of 2.0m between the maintenance door slot and the working door slot for the staff to overhaul. The specific size layout of the pier is shown in Figure 2.1