1. . General requirements
(1) The content of this chapter applies to the leakage prevention of planted roofs and planted underground building roofs; the details of leakage prevention shall comply with the "Roofing Engineering Quality Acceptance Code" GB50207-2012, " Roofing Engineering Technical Specification " According to standards such as GB50345-2012, "Technical Specifications for Planted Roof Engineering" JGJ155-2013 and "Planted Roof Building Structure" 14J206, this guideline clarifies the waterproofing details of each key part of the planted roof waterproofing project to achieve the purpose of preventing leakage.
(2) The concrete strength grade and waterproofing methods involved in the planted roof project must comply with the requirements of the design drawings.
(3) Before the construction of a waterproof project (including waterproof base construction), the project technical leader must organize technical personnel to review the drawings and master the waterproof technical requirements of the main body and detailed structure of the project. The waterproof construction contractor must prepare and submit a " "Waterproof Project Construction Plan", construction can only be carried out after being approved by the engineering department of the supervision unit and the construction unit.
(4) Concrete: In order to improve the self-waterproofing performance of the structure, the reinforcement ratio of the roof panel can be appropriately increased, and the cracks on the panel can be controlled by configuring a two-way steel mesh to improve the self-waterproofing performance of the structure; underground building roof Slope finding should be done structurally.
2. The standard method for selecting the first-level defense and waterproof layer for planted flat roofs and underground building roofs:
3. Detailed node structure and requirements:
Appendix 3.1 Planted roofs
Description:
1. Planted roofs are all Grade I waterproofing grade , two For waterproofing, a root puncture-resistant waterproof material must be installed on the upper surface.
Explanation of key points in quality control
1. The finished product of the water filter layer and hydrophobic plate should be well protected to avoid losing the hydrophobic effect.
2. It is forbidden to use closed upper reverse beams in the roof structure. If reverse beams must be used in special circumstances, the grooves should be filled in or drainage channels should be set up.
3. A buffer zone with a width greater than 300mm (open ditch, pebble belt, etc.) should be set up in the planting area where there is flooding;
4. The deformation joints of the planting roof are under the backfill soil, causing potential leakage risks.
Attachment 3.2 Waterproof closing method
Instructions:
1. The waterproofing of the parapet wall of the planting roof and the roof side wall of the underground building should be raised, and it should be no less than 500mm higher than the upper surface of the planting or the building surface; it is recommended that the waterproof closing area be 20× 80mm groove and fixed with stainless metal battens.
Key points in quality control explain
waterproof closing head should be made of stainless metal beading, cement steel nails fixed with a spacing of 250mm; and then use asphalt ointment to seal the waterproof upper opening.
4. Concrete anti-sill setting requirements
