一种绿化带地下工程顶板的组合防水层
By using a double-layer waterproof membrane design, combining flexible and rigid waterproof layers, the problem of easy tearing of the waterproof layer on the top of the green belt due to stress concentration is solved, achieving efficient waterproofing and improved durability, adapting to structural deformation and preventing damage from plant roots.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 中建五局第三建设有限公司
- Filing Date
- 2025-07-22
- Publication Date
- 2026-07-17
AI Technical Summary
Traditional underground engineering waterproofing layers are prone to tearing on the top slab of green belts due to localized stress concentration, resulting in a reduced service life of the waterproofing layer and an inability to meet higher waterproofing requirements.
The design employs a double-layer waterproof membrane, combining flexible and rigid waterproof layers. The lower flexible sealing layer is formed by a non-curing rubber asphalt waterproof coating layer and an SBS modified bitumen waterproof membrane layer, while the upper rigid shell layer is formed by a EPDM self-adhesive waterproof membrane layer and a fine stone concrete protective layer, allowing relative displacement within 5mm to buffer stress.
It significantly improves waterproofing and durability, prevents tearing caused by localized stress concentration, extends service life, and prevents plant root damage through chemical root inhibitors and physical barriers, exhibiting excellent resistance to root penetration.
Smart Images
Figure CN224514388U_ABST
Abstract
Claims
1. A combined waterproof layer for the roof of an underground engineering of a green belt, characterized in that: From the inside out, it includes the underground engineering roof slab structure layer, waterproof coating layer, first waterproof membrane layer, second waterproof membrane layer, and protective layer; The top slab structure of the underground project is a concrete structure layer; The waterproof coating layer is a non-curing rubber asphalt waterproof coating layer; The first waterproof membrane layer is an SBS modified bitumen waterproof membrane layer; The second waterproof membrane layer is a root-penetration resistant self-adhesive waterproof membrane layer made of EPDM butyl rubber; The protective layer is a fine aggregate concrete protective layer.
2. The combined waterproof layer of the verge underground engineering roof according to claim 1, characterized in that: The fine stone concrete protective layer adopts a compartmentalized structure, with compartmentalized joints between each compartment. Waterproof sealant is injected into the compartmentalized joints, and extruded polystyrene strips are filled on the surface of the compartmentalized joints.
3. The combined waterproof layer of the green belt underground engineering roof according to claim 1 or 2, characterized in that: The concrete structural layer is made of waterproof concrete.
4. The combined waterproof layer of the green belt underground engineering roof according to claim 1 or 2, characterized in that: The thickness of the waterproof coating layer is 1.5-2.0 mm.
5. The combined waterproof layer of the green belt underground engineering roof according to claim 1 or 2, characterized in that: The thickness of the first waterproof membrane layer is 3.0-4.0 mm.
6. The combined waterproof layer of the green belt underground engineering roof according to claim 1 or 2, characterized in that: The thickness of the second waterproof membrane layer is 1.2-1.5mm.
7. The combined waterproof layer of the green belt underground engineering roof according to claim 1 or 2, characterized in that: The fine aggregate concrete protective layer has a strength of C20-C25 and a thickness of 70-150mm.
8. The combined waterproof layer of the green belt underground engineering roof according to claim 1 or 2, characterized in that: The overlap width of the long side of the first or second waterproof membrane layer shall not be less than 100mm, and the overlap width of the short side shall not be less than 150mm; the stagger width between the joints of the first and second waterproof membrane layers shall not be less than 250mm.
9. The combined waterproof layer of the green belt underground engineering roof according to claim 2, characterized in that: The single bin area of the fine stone concrete protective layer is less than or equal to 36m 2 .