Pipelines: Buildings

Drainage on cantonal roads. Polluted waste water must be treated, do not allow polluted waste water to be drained wherever possible. These basic principles also apply to transport routes. The shafts and control shafts are used for access to the sewer system for inspection and maintenance purposes. In addition, they serve as a connection point to the main and secondary lines of the sewers.州管道路的排水工程。受污染的废水必须经处理达标后方可排放，任何情况下均不得随意排放未处理的受污染废水。上述基本原则同样适用于各类交通线路。检查井与控制井用于进入下水道系统，以开展检测与维护作业。此外，此类井体还可作为下水道主干管线与分支管线的连接节点。