A digital television industrial park planted roof waterproofing technology

1 Project Overview
"China Digital Tv Industry Park Construction Project" is located in the Baima Lake Cultural and Creative Park in Hangzhou Riverside District, Zhejiang Province, with a total construction area of 165,900 m2, of which 105 773m2 is above ground and 60 60 m2 is underground. 127 m2; The above-ground section consists of seven office production buildings (A, B, C, D, E, F, G) and 3 floors of audio and video testing center (H building) from 6 to 11 storeys, and 2 floors below ground. Building H is a reinforced concrete frame structure, while the other building is a reinforced concrete frame cutting structure. The waterproofing project is mainly divided into three parts of basement garage roof, skirt, main roof, waterproof area of about 35,000
m2
;2 Planting roof waterproof design and material selection
2.1 waterproof design
The plant roof of this project uses a soft combination of waterproof design, in which rigid waterproof for reinforced concrete structure self-waterproofing; The waterproof structure of the plant roof, see Figure 1.
Plant roof waterproof structure
2.2 material selection introduction
1) non-cured rubber asphalt waterproof coating
non-cured rubber asphalt waterproof coating is a rubber, asphalt and additives mixed to make, in the application of the state always maintain a viscous paste waterproof coating. The coating is easy to construct, can be heated into a flow state through the site, scraped on the grass to form a strong bonding force, with creep and self-healing function of the waterproof layer, it can be used as a separate waterproof layer, but also with the coil to form a composite waterproof layer.
2) BAC-P double-sided self-adhesive waterproof coil
BAC-P double-sided self-adhesive waterproof coil is a non-tire self-stick waterproof coil with strong anti-pull and tear resistance, high elongation, and excellent UV resistance and stability. The coil bond is reliable, has a unique self-healing, can automatically heal small cracks, the coil appears any local damage, the water will be limited to a very small range, will not flow, leakage point and damage point consistent, very easy to repair. The coil is suitable for roofing and underground waterproofing works in various buildings.
3) BAC root-piercing self-adhesive waterproof coil
BAC root-resistant puncture self-stick waterproof coil is specifically for the planting requirements of the basement roof, roof and other parts of the development, is a long fiber polyester felt as a tire base, to add imported chemical blocker self-adhesive asphalt as a coating material, two sides covered with isolation material made of self-adhesive modified asphalt waterproof coil. The coil has the same waterproof performance as BAC self-adhesive waterproof coil, but also has the function of preventing plant roots from penetrating, suitable for all kinds of roofing and underground works with planting requirements for buildings.
the above-mentioned coatings and coils, coils and coils between a high degree of compatible, and complementary functions.
2.3 Risk Zone Division
According to the specific situation of the project and the building drawings provided by Party A for the waterproof construction of the planting roof to divide the risk area, the nodes inside the risk area are numbered, which not only facilitates the management of the project by the site management personnel, so that the construction is carried out in an orderly manner, but also facilitates the maintenance phase of the project (such as leakage accident) owners to Zhubao company claims. Planting roofing risk units, see Figure 2. The roof risk units of each building are numbered separately according to the building, where H building is structurally self-waterproofing.
Planting roof risk unit division
Planting roof construction process
3.1 requirements for the grass-roots
1) to remove grass-roots surface debris, oil, sand, etc., cleaning work must be at any time during construction Carry out; 2) grass-roots repair flat; 3) Yin, yang corners smeared into an arc; 4) grass-roots if there is clear water, need to be cleaned up before construction; 5) all kinds of pre-buried parts have been pre-installed, and fixed.
3.2 process
heating non-cured rubber asphalt waterproof coating→ clean the grass →seal treatment→ node to strengthen the treatment →seeding bullet line→ test shop root-resistant puncture waterproof coil → construction non-cured rubber asphalt waterproof coating→ laying root-resistant puncture waterproof coil → roll-on → organization acceptance.
3.3 Construction process
1) Heating non-cured rubber asphalt waterproof coating: the non-cured rubber asphalt waterproof coating into a special heating equipment for heating, while the construction area of other materials ready, see Figure 3.
Coating heating (left), construction site material preparation (right)
2) blasting treatment grass-roots: after site survey, some places at the grass-roots sand phenomenon, so the grass-roots to take blast treatment (Figure 4), requires a uniform, rough, clean base after blasting. Blast treatment can open the capillary holes of concrete structure, improve the adhesion performance of the coating, and the grass after blasting is more likely to expose defects in its surface, and can better repair and strengthen the work before construction.
3) Cleaning the grass roots: the grass should be clean, flat, for uneven parts need to be repaired flat, or with hand-held grinding machine for grinding treatment, for the back of the pouring belt and other parts of the base surface is particularly uneven, should be used hydration grinding machine for hydration, thereby enhancing the bonding force of the grass and paint.
4) Brushing basic treatment agent: in the daughter wall and detail node position evenly brush supporting grass treatment agent, so as not to leak, not exposed.
5) Additional layer treatment: node parts (e.g., water drop port, wear plate pipe, yin and yang angle, etc.) using non-cured rubber asphalt waterproof coating and mesh cloth for enhanced treatment, and then a layer of BAC-P double-sided self-adhesive waterproof coil, see Figure 5.
Additional layer treatment
6) large-scale construction:
(1) positioning bullet line: in a divided manner, to determine the construction of non-cured rubber asphalt waterproof coating range, the width of each grid is 0.92 m, length is 5 m, area of 4.6 m2;
(2) test shop root puncture waterproof coil: the coil natural relaxation spread out, according to the control line placed, and then the coil from both ends to the middle of the roll;
(3) Large-surface coating scraping: the heated non-cured rubber asphalt waterproof coating, loaded into a special barrel with scale, the weight of the coating per barrel is 11.5 kg, and then 11.5 kg of paint Poured in a 4.6 m2 grid, to ensure that the amount of paint is 2.5 kg/m2, and then according to the range of the bullet line will be non-cured rubber asphalt waterproof paint scraped on the base surface, scraping thickness should be uniform, not exposed;
(4) spread the root-proof waterproof coil: before the coating cools down, remove the isolation film on the surface of the root-piercing waterproof coil, and paste the coil on the coating
(5) coil bonding: the root-resistant puncture waterproof coil with the edge of the isolation film removed, self-bonding, coil T-type connection interface with non-cured rubber asphalt waterproof coating for internal and external sealing treatment;4 Waterproof treatment of the main node site
4.1 daughter wall
1) daughter wall corner first scraped the first non-cured rubber asphalt waterproof coating, and spread the corresponding size of the glass fiber mesh cloth, and then scraped the second non-cured rubber asphalt waterproof coating, the mesh cloth covered, paint plane and facade direction are 250 mm; Green waterproof coating, turned up to the daughter wall facade direction of the height is not less than the plane finish surface above 250 mm; 3) BAC-P double-sided self-adhesive waterproof coil paved on the base of the painted non-cured rubber asphalt waterproof coating, daughter wall facade coil roll to the plane to complete the surface above 250 mm; Daughter wall waterproof construction, see Figure 6.
Daughter wall waterproof construction
4.2 drop port
1) water drop port around the scraping non-cured rubber asphalt waterproof paint and glass fiber mesh cloth to strengthen treatment, paint and fiberglass mesh cloth plane width of 250 mm; Waterproof construction of the drop port, see Figure 7.
Watering structure of the drop-off port
4.3 skirt roof trench
1) in the sky ditch first painted a layer of non-cured rubber asphalt waterproof paint, pasted on top of the glass fiber mesh cloth; 2) and then painted again non-cured rubber asphalt waterproof paint, and at the same time put BAC-P double Surface self-adhesive waterproof coil paste into the trench, the large side of BAC root-piercing self-stick waterproof coil glued to BAC-P double-sided self-stick waterproof coil; Skirt roof trench waterproof construction, see Figure 8.
waterproof structure of the roof of the skirt
4.4 the watering belt behind the skirt
1) first polishes the perms of the rear pouring belt into an arc with a polisher, and then paints a layer Non-cured rubber asphalt waterproof coating; 2) paste glass fiber mesh cloth; 3) brush a layer of 2 mm thick non-cured rubber asphalt waterproof coating, paste 4 mm thick BAC root-resistant puncture self-stick waterproof coil. The rear of the skirt is watered with waterproof construction, see Figure 9.
Skirts with waterproof structure
5 conclusion
this planting roof basement garage roof, skirt roof waterproofing project, flexible waterproofing using Zhubao company's zero defect super paste must waterproof system, the choice of paint and roll, roll and roll between good compatible, waterproof layer can form a whole, waterproof function is guaranteed. In the construction, the risk unit is divided by region, which is convenient not only for the management of the construction site, but also for the detection and claim after leakage. After the construction of the waterproofing project of the planting roof was completed, after the examination of the closed water experiment, there was no leakage in all parts.