There are basically two types of drainage channel: the first is a sunchannel: a sunchannel, also known as a "open channel", is a drainage channel that exposes the ground. The second type is hidden channel: concealed channel (also called blind channel), used in some venues that require good drainage, such as the high groundwater level of the gymnasium, which can affect plant growth. Blind channel can be used.
The channel body is generally "U", "V" type, made of polymer concrete, and the cover has a grid one, a slot one, etc., and the material is mostly stainless steel. It is the second-generation drainage channel.
U-shaped drainage channel
The structure of drainage channel is divided into type A drainage channel, type B drainage channel and trapezoidal drainage channel. Type A and Type B are rectangular, but the size is different, trapezoid is trapezoidal shape. Specific specifications refer to the construction drawings.
Rectangular drainage channel: advantages, the width of the top excavation is small, and the depth can be controlled at will.
Disadvantages, the structure is unstable, it is easy to collapse and block the channel, and the maintenance frequency is high.
Trapezoidal drainage channel: advantages, stable structure, no need for frequent maintenance after completion.
Disadvantages: wide excavation area and large amount of engineering earthwork. The depth is proportional to the width of the excavation surface.
