Slope originally refers to the angle α between the slope (line) and the ground plane (line). In engineering practice, it is not easy to control the construction angle. People have come up with a good way to control the size, which is to replace it with the tangent tanα of the angle α, that is, the height difference between two points/the horizontal distance between two points, and the percentage of h/L directly replaces the slope, such as marking 1.5/%, 2.0% and so on. This representation is very convenient, and it is also convenient to use on gentle slopes. However, for steep slope walls and pit walls, it is more convenient to use the percentage than to use the reciprocal simplified form of the percentage, such as 1/0. 1 (labeled as 1: 0. 1), that is, when the vertical direction is 1 m, the horizontal distance should be 0./kloc-0. This is very convenient for high slope support and foundation pit ash discharge line. Such as 1: 0. 15, 1: 0.2, 1: 0.3 and so on.
The former is called' slope' and the latter is called' slope'. The two appearances are different, but the essence is the same.