1. If the foundation is wide, it can be buried shallowly, but the depth should not be less than the outdoor ground for protection. The actual height should not be less than115 of the above-ground height of the building, and the pile foundation should not be less than118, so the pile length is not calculated.
2. The depth, length and width of the foundation are determined by the height, structure, soil quality and climate of the actual building. If the building has many floors and the rock stratum is deep, the foundation must be dug deep. If the house is low and the rock stratum is shallow, the foundation can be shallow.
Precautions for foundation laying:
In order to make the building use safely and normally without being damaged, it is required that the foundation cannot be damaged under the load. The deformation of the soil layer that constitutes the foundation due to expansion, contraction, compression, frost heave, collapse and other reasons should not be too large. Therefore, in the basic design, we should consider:
1, the pressure per unit area at the bottom of foundation is less than the allowable bearing capacity of foundation.
2. The settlement value of the building is less than the allowable deformation value.
3. There is no danger of foundation sliding.
Refer to the above? Baidu Encyclopedia-Basic