Drain pipe:
1, according to the overall planning, road and building layout, terrain elevation, sewage and rainwater destination and other factors, according to the principle of shortest pipeline, minimum buried depth and automatic discharge as far as possible.
2. Drainage pipes should be laid in parallel along the periphery of roads and buildings to minimize the intersection with other pipes.
3, the bottom of the pipeline should try not to know the sidewalk or the grass outside the road.
4. When laying drainage pipes, the horizontal distance and vertical clear distance between each other and other pipes should be determined according to the types, buried depth, mutual influence of construction and maintenance, the size of ancillary structures on the road and relevant local regulations.
5, drainage pipe bend and junction, water flow angle should be not less than 90 degrees. When the pipe diameter is less than 300 and the drop is greater than 0.3m, the angle can be unlimited.
Water supply pipeline:
1, the supervisor shall be arranged as a ring network.
2. The supervisor should be arranged in the area with large water quantity to supply water to large users in the shortest distance.
3. It is suitable for parallel laying of road center lines or main buildings, so as to minimize crossing.
4. The minimum clear distance from buildings and other pipelines is basically the same as that of drainage pipelines.
5. Buried depth is determined according to freezing depth, external load, pipeline strength and other factors such as pipeline crossing.
6, generally laid on undisturbed undisturbed soil layer. For silt and other foundations whose bearing capacity cannot meet the requirements, foundation treatment should be carried out.
Building water supply and drainage mainly remember the following principles:
Wire tube drain pipe
Water pipes and ventilation pipes
Small pipes make way for big pipes.
Cold water pipes let hot water pipes.
Low pressure pipe to high pressure pipe.
The pressure tube constitutes a gravity tube.
These involve almost all pipelines in China, among which the pressure pipe belongs to whom and gravity belongs to drainage.