When the upper structure of a building is supported by a frame structure or a single-layer frame structure, the foundation is often a stand-alone foundation in the form of a cylinder or a polygon. This type of foundation is called a stand-alone foundation, also called a separate foundation. There are three independent foundations: the basic foundation, the slope foundation, and the cup foundation.
Features:
1. Generally only located at the intersection of a cross-axis, and sometimes connected to other strip-shaped foundations, but the cross-section size and reinforcement are not the same. The independent foundation carries several independent columns at the intersection of several axes, called the joint independent foundation.
2. The reinforcement in both the longitudinal and transverse directions within the foundation are stressed steel bars, and the long direction is generally arranged below. The aspect ratio is within 3 times and the bottom area is within 20 m2 (independent pile cap).
Scope of application:
Mostly used in the case of frame structures or separate columns.