The 90-meter-wide fitness turntable is installed 3 meters above the ground. The ground installation of equipment and its buried structure shall meet the following requirements (except for large ground frame foundation equipment): 1. Buried equipment columns shall be reliably fixed by transverse supports or support plates; 2. The soil quality of the installation equipment shall be non-loose and non-sandy loam geological structure of Class II ordinary hard soil, and the fastening coefficient shall be not less than 0.7 within 800 mm from the ground; Otherwise, the soil should be treated equivalently before installing the equipment; Note: Grade II ordinary hard soil with fastening coefficient not less than 0.7 can be determined according to the difficulty of digging with one shovel and several picks. The soil that needs to be excavated with shovels and pickaxes can be regarded as Grade II ordinary hard soil with a fastening coefficient of not less than 0.7. 3. Buried depth of equipment column: When the equipment is above ≥2000mm, it should not be less than 500mm；; Equipment height above the ground ≥ 1000 mm