How do you make the basement floor of the Winter Olympics waterproof? The ultra-detailed solution is here!

In this paper
taking the 2022 "Winter Olympics" Zhangjiakou Olympic Village project as an example, from the design and construction aspects, the northern low-temperature area basement floor waterproofing practices are interpreted.
Basics of The
24th Winter Olympic Games, referred to as the "Beijing Zhangjiakou Winter Olympics", will be held jointly in Beijing and Zhangjiakou City from February 04, 2022 to February 20, 2022.
"Zhangjiakou Olympic Village" project is to organize the Winter Olympic Games supporting facilities, is from all over the world athletes, coaches to provide a place to live, for the national key projects, but also Hebei Province, "three one village" planning and construction projects .
"Zhangjiakou Olympic Village" project location - Zhangjiakou Chongli District, is a low-temperature area at high altitude, the annual effective construction period from the end of April to the end of September of that year, into October, because of large areas of snow can not carry out outdoor construction.
the basement floor waterproofing project is divided into group C, group D and group G three blocks.
total area of the base plate: 36000m2, has been completed 30000m2,
selected material: Zhuobao research and development of 1.5mm thick S-CLF strong cross-laminate self-adhesive waterproof coil
Construction process: pre-paved anti-stick construction process
a basement floor waterproof design
less than 2 years from the opening of the 2022 Winter Olympics, and this year's rainy season has a great impact on the project duration, so the entire project duration is tight, heavy tasks. Basement substrate waterproof design using 1.5 thick S-CLF strong cross-laminate self-adhesive waterproof coil pre-paved anti-stick, pre-paved anti-stick will be pre-paved waterproof coil pre-empty paved on the mat layer, bonding face up and back poured concrete bonding, so that the concrete structure and waterproof coil tightly combined construction methods. Its waterproof design is shown in the figure below.
Pre-paved anti-stick has the following advantages:
(1) basement floor traditional waterproofing practice is waterproof layer and pad bonding, and pre-paved anti-adhesive method is bonding face up and back-pouring structure bonding, waterproof coil and structural bottom plate closely combined to eliminate the water layer, even if the waterproof layer has breakage points, while the structure is defective, as long as the two do not re-converg will not appear leakage probability.(2) also according to the "underground engineering waterproofing technical specifications" GB 50108-2008 provisions, "roll waterproof layer using pre-paved anti-stick construction, can not do protective layer", so pre-paved anti-adhesive construction after laying waterproof layer can be directly tied to the steel knot pouring structure concrete, easy to eliminate the water layer, but also save the structure layer.(3) because of pre-paved anti-stick construction, the back of the coil is empty on the mat layer, so the grass-roots requirements are lower. The base surface is clean and smooth, the wet substation as long as there is no bright water can also be constructed, the rainy season construction is also very convenient.
, the basement floor pre-paved anti-stick construction can not only improve the waterproof effect, but also shorten the construction cycle, saving comprehensive costs. 2 S-CLF strong cross-lamination film self-adhesive waterproof coil introduction the current market commonly used pre-paved materials by material composition is divided into two main categories, one is non-asphalt-based pre-paved waterproof coils, such as polymer self-mucous film waterproof coils, the other is asphalt-based pre-paved waterproof coils. Asphalt-based pre-paved waterproof coils can also be subdivided into two categories, one is asphalt-based polyester tire pre-paved waterproof coils, the other is asphalt-based strong cross-laminate pre-paved waterproof coils, S-CLF strong cross-laminate self-adhesive waterproof coils belong to this category. 1, material construction
the material in the middle of a strong cross-laminated film polymer sheet, the two sides of the sheet composite self-stick rubber asphalt adhesive, the lower surface for the isolation film, the upper surface covered with fine sand particle material (anti-stick reduction layer). During construction, the back of the coil is laid empty on the mat layer, and the sand surface is up and bonded with the concrete of the back cast structure. 2, material characteristics
S-CLF strong cross-laminate self-adhesive waterproof coil developed by Zhuobao Group, combined with non-asphalt-based pre-paved waterproof coil and asphalt-based polyester tire pre-paved waterproof coil advantages, and on this basis made further improvements, its characteristics are as follows.
(1) material is soft and easy to construct. The main material in the middle of S-CLF is a strong cross-lamination film with a thickness of less than 0.3mm, and the material as a whole is relatively soft, but does not reduce performance. Rolls in yin and yang corner and other nodes when the construction of good service, construction is convenient.(2) double-sided bonding design, facade is easy to fix. S-CLF adopts a double-sided self-adhesive design, in the platform, floor beams, puddles, elevator wells and other vertical face position construction can be removed the bottom isolation film, pasted on the facade for temporary fixation, construction is very convenient. The single-sided bonding of pre-paved coils in the vertical face position and corner areas need to be mechanically fixed, construction trouble, but also destroy the integrity of the waterproof layer.(3) adhesive bonding, hook up securely. S-CLF pre-paved coils with double-sided self-adhesive design, long and short edge tie can be achieved adhesive, and the joint site has anti-pollution isolation film, to avoid the construction process of the joint edge pollution. According to its implementation standards, the peeling strength of coils and coils is above 1.0N/mm.(4) glue layer thicker, more reliable bonding, better water resistance: S-CLF double-sided glue layer thickness of 0.5mm, bonding surface and back-poured concrete can be long-lasting solid bonding, to ensure water resistance. The standard of pre-paved coils requires that its peeling strength with back-poured concrete should reach 1.5N/mm, and its water resistance index is 0.8MPa/35mm, 4h does not run water., good pre-paved waterproof coils to meet the following requirements. One is to tie up to be secure, although pre-paved anti-stick can eliminate water, but if the coil waterproof layer leakage point too much, the bottom plate leakage probability is also very large. The second is to ensure that the pre-paved coil and the rear pouring plate bonding effect, only sticky fast, sticky long-lasting can resist the water to achieve the purpose of pre-paved anti-stick. Third, pre-paved materials also need to have a good construction application, that is, construction is convenient.
3 Construction process
1, construction process
grass-roots clean-up, node processing, laying S-CLF strong cross-lamination film self-adhesive waterproof coil, coil length, short edge tie-up, large surface completion.
2, construction steps
(1) grass-roots clean-up: the debris clean up, if the grass-roots if there are sharp bulges need to be treated flat, if there is clear water cleaning can be constructed.
(2) node processing: in the platform pit, yin and yang angle and other parts, the use of double-sided self-adhesive waterproof coil as a node additional layer, the width of the additional layer is 500mm. When laying large surface S-CLF waterproof coils, the upper surface isolation film of the additional layer should be removed.
the root of the anchor bar is coated with cement base penetration crystalline waterproof coating, the brush range is 200mm around the root of the anchor bar. After the large waterproof layer is laid, the anchor bar is sealed with rubber asphalt waterproof coating.(3) laying S-CLF waterproof coil: S-CLF strong cross-lamination film self-adhesive waterproof coil in accordance with the baseline empty spread on the base, sand face up. When laying coils, the coils should not be stretched forcely and should always be aligned with the baseline to avoid deviations.
(4) long-edge bonding: coil long-edge bonding using a self-bonding way, the width of the tie is 80mm. Remove the anti-pollution isolation film from the adjacent two coil joints and paste it together, and then roll pressure to ensure that the bond is firm.
(5) short-sided tie-up: coil short-sided tie-up using docking method: two coils of short edge alignment, cropped a 160mm wide double-sided self-adhesive coil tie-up strip placed under the stitch, To stitch as the center of each side 80mm wide, and then remove the two coils at the edge and double-sided self-adhesive coils on the surface of the isolation film and self-bonding, and then use rollers for crushing to ensure firm bonding.
(6) large-sided finish. Se four finished product protection
because the project uses pre-paved anti-stick construction, do not do protective layer, in order to ensure that the waterproof layer is not destroyed, the subsequent floor structure construction needs to have corresponding protection measures.
the bottom plate rebar construction period is the most easy to cause damage to the coil stage, at this time need to focus on control, the main considerations have the following points. Rebar should be in line with the principle of light, can not be dragged on the waterproof layer, in the tie-up process into the need to move the rebar, or in the waterproof layer to store the rebar, should be set up below the wood or template. In rebar welding, avoid welding slag burned waterproof layer, can be in advance on the welding site waterproof layer sprinkled water.in accordance with strict protection measures at the same time, the site needs to arrange a special person to inspect the damage point, found damage timely repair. For larger breakage points, you can crop the appropriate size of the coil to patch the way, if the breakage point is small, you can also use a better compatibility paint to repair. In some cases, individual small breakage points have not been found, these very individual breakages will not have much impact on the entire waterproof layer, because there is no water flow channel between the waterproof layer and the structure, as long as the damage point and structural defects do not fit will not seepage.
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