How to organize drainage in roof garden?

Matters needing attention in drainage: Waterproof layer is the key technical problem to ensure that the roof is watertight, but roof waterproofing and drainage are two aspects of the same problem, so the drainage system of the roof must be handled well.

In the roof garden project, planting ponds, water pools and road sites should be planned and designed according to the original roof drainage system, and the original drains and slopes should not be blocked, isolated or changed.

In particular, the drainage pipe under the drainage layer of large planting ponds should cooperate with the roof drainage pipe, and pay attention to the relevant standard deviation, so that the drainage pipe under the drainage layer of planting ponds should cooperate with the roof drainage pipe, and pay attention to the relevant height difference, so that excess irrigation in planting ponds can be discharged smoothly.

Extended data:

1. What factors should be considered in roof garden design: 1. Bearing capacity 2. Waterproof 3. Water storage and drainage. Root cutting treatment of plants. Selection of plants. Load; Divided into the roof and the roof.

The live load on the roof is 50kg/㎡, reaching 70-80kg/㎡ in some areas. The live load of the owner's house surface is 150kg/㎡. The live load of the roof garden is 20050kg/㎡. Plant load, planting soil load, flower pond load (100 ~150kg/m2), water load (100kg/m2 when water depth 10m), rockery and sculpture load (2000 ~ 2500kg/m2).

Secondly, there are two most important points. One is the bearing capacity of the building itself. When designing a roof garden, we should first consider whether the bearing capacity is feasible. The other is waterproof, once the roof is green.

A considerable part of the whole roof will be in a humid environment for a long time. At this time, the requirements for roof waterproofing will be very high. After waterproofing, it is necessary to carry out a water closing test for four days and four nights to ensure that there is no waterproof problem. The other is the root blocking puncture of plants. At present, there are generally two root plugging methods: physical root plugging method and chemical root plugging method.