The underground pipeline composite support is a kind of structure used for laying pipeline supports. There are fixed brackets, sliding brackets, guide brackets, rolling brackets, etc. The pipe support is used wherever the pipe is placed, and is also called pipe support, pipe part, etc.

As the supporting structure of the pipeline, the pipe rack is divided into fixed type and movable type according to the operating performance and layout requirements of the pipeline. The place where the fixed point is set will become the fixed bracket. This kind of pipeline and pipeline support cannot produce relative displacement. In addition, since the pipe frame must have sufficient rigidity, the deformation of the fixed pipe frame after compression should be smaller than the deformation value of the pipeline compensator. The place where the intermediate support is set adopts a movable tube frame, which allows the relative displacement between the tube and the tube frame, and does not limit the thermal deformation of the tube.

According to the material of the bracket, it can be divided into steel structure, reinforced concrete structure, brick-wood structure and so on. According to the purpose, it can be divided into movable bracket and fixed bracket. The fixing bracket is used where the axial displacement of the pipe is not allowed. The movable supports are divided into sliding supports, guide supports and rolling supports.