Before waterproof construction, technical, quality and management personnel should first be familiar with the design requirements, and fully learn and understand the construction specifications, construction schemes and technical requirements. Do know fairly well, and the technical and quality acceptance criteria are clear. Then, here are the skills of waterproof construction scheme for underground garage floor that I have compiled for you. Welcome to read and browse.
I. Material characteristics
SBC 120 series polyethylene-polypropylene composite waterproofing membrane (abbreviated as ethylene-propylene composite waterproofing membrane) is a kind of waterproof material with linear polyethylene as the main waterproof layer and double-sided composite polypropylene filament non-woven fabric as the reinforcement layer, which has good comprehensive performance and is convenient for engineering construction. This series of products are divided into three categories ***8 varieties: the gas-proof and moisture-proof category is mainly used for steam-proof of roof insulation layer and moisture-proof of interior wall, with specifications of G200g/m2 and 250g/m2；; Waterproofing is mainly used for single-layer or composite waterproofing of roofs, and is suitable for Ⅰ-Ⅳ waterproof roofs with specifications of 300g/m2, 350g/m2 and 400g/m2；. Pollution prevention and seepage control are mainly used for underground waterproofing and seepage control in construction, water conservancy, chemical industry and metallurgy, with specifications of 500g/m2 and 600g/m2.
Second, the product application technology
Polyethylene-polypropylene composite waterproofing membrane can be bonded to the building main body with various adhesives, and its outstanding feature is that cement material can be used as adhesive. Its formula is: cement slurry containing 5%-20% 107 glue (polyvinyl formal) or cement slurry containing 2.5% special rubber powder for polyethylene polypropylene fiber composite waterproofing membrane (water content is 30%-35%, referred to as cement glue).
Three. Project overview
The project is located at the intersection of Zaoguo Road and Changde Avenue in Changde City, with a total construction area of about square meters. Underground garage 1 floor, and the underground garage is waterproof. Due to the underground structure, the waterproof design of garage floor adopts polyethylene polypropylene composite waterproofing membrane. The bottom plate is made of self-waterproof concrete with impervious grade S9 and flexible waterproof design. The material is (300g) polyethylene polypropylene composite waterproofing membrane, and the upper part of the membrane is C20 fine stone concrete with 40-thick concrete protective layer. This construction scheme is specially formulated.
Four. Compilation basis:
1, according to China people's * * * and China's Code for Quality Acceptance of Roofing Waterproofing Works, local building waterproof works construction and acceptance specifications, procedures and quality inspection evaluation standards.
2, the project construction drawing design drawings;
3. Construction organization design;
4. The characteristics of this project, the environment and natural conditions of the construction site, etc.
Five, material selection:
1, polyethylene polypropylene fiber 300g waterproofing membrane, GB18173-1-2006 standard waterproofing membrane.
2. Accessories: special glue, cement and purified water.
3. Re-inspection of incoming materials: samples of products of the same manufacturer, same brand and same grade, 5 volumes larger than 1000,1000? Extract 4 volumes from 499 volumes, and extract 2 volumes below 100 volume. According to the specification, size and appearance quality inspection, cut the coil used for the second interview at a place 300㎜ away from the outer coil head, and then cut two full rolls 1500㎜ longitudinally, one for physical performance inspection and the other for standby.
4. Materials should be placed indoors after entering the site to avoid rain.
Six, the requirements of the grassroots:
The base surface of waterproof construction should be solid, flat and smooth, and there should be no looseness, sand, cracks, cocking, protruding, potholes and hollowing, otherwise the waterproof quality will be seriously affected.
Seven, waterproof main and auxiliary materials construction requirements:
1. Proportion of cement slurry: preparation of cement paste.
Preparation method of adding 107 glue to cement When the weight ratio of 107 glue to cement is 20%, the water content per kilogram of cement is controlled at 0.40 ~ 0.43 kg; When the weight ratio of 107 glue to cement is 10%, the water consumption per kilogram of cement should be controlled at 0.47 ~ 0.50 kg. During preparation, the 107 glue is put into a glue-making container, and water is added while stirring, and then the 107 glue is completely dissolved, and then the cement is added while stirring, and after the cement is added, the mixture is stirred uniformly without clots, sedimentation and foam.
2, play a good baseline on the construction base, and adjust the coil paving;
3, the base surface can't have Mingshui, if it is very dry, it is necessary to spray water on the surface of the base surface for humidification;
4, the ground and coil coating should be uniform, shall not be missed, after straightening compaction leveling.
Eight, the waterproof layer construction and operation
Construction sequence: start from the northeast of the garage roof, and reserve a protective layer construction lane in the middle, starting from north to south. During construction, construction can be carried out from the middle to both ends.
1, construction conditions
(1) The construction temperature of polyethylene polypropylene waterproofing membrane should be above 5℃ and below 25℃. It is forbidden to construct in rainy days, snowy days and strong winds of level 5 or above. Rainproof measures should be taken in case of rainy days during construction. It is forbidden to construct in rainy days.
(2) As long as there is no open water under wet conditions, grass-roots construction can be carried out.
2. The pasting and laying of polyethylene polypropylene waterproofing membrane shall be operated according to the following provisions.
Determination of the pasting direction of (1) coil.
When the gradient is 3%, the coiled material can be laid with parallel or vertical gradient. Requirements: The upper and lower coils shall not be laid vertically.
(2) Before the construction of the waterproof layer of the garage roof, the additional layer of the post-cast strip should be treated first, and a 500-mm-wide polyethylene polypropylene waterproofing membrane should be added.
(3) Before pasting the additional layer, pre-lay 500MM-wide coil at the laying place, align the back and fix it in the middle. Roll one end of the coil to a fixed place, spread glue on it, and after this end is pasted, roll the other end of the coil placed in advance back to the pasting position and paste it continuously until the whole picture.
(4) Glue spreading method: firstly, pour the prepared glue into a small container on the leveling layer at the pre-gluing place, and the glue should be continuous and uniform with a thickness of 1mm, then spread the coil with a scraper, exhaust and compact it, and discharge the excess cement glue.
(5) Lapping method is adopted for coil laying, and the lap width of coil is 80- 100mm for both long and short sides. Overlapping of the upper and lower layers and adjacent two layers of coiled materials and overlapping of the main waterproof layer and the additional layer are staggered by more than 1/3.
(6) The lap joint of the coil is sticky. After the joint is compacted, brush a layer of cement slurry on the edge of the joint to seal the joint tightly, and it is not allowed to show the bottom, wrinkle, warp and empty drum.
(7) The facade composite coiled material must be pasted vertically, aligned up and down, and exhausted and compacted from bottom to top. It is required that the base and the coil be coated with cement glue at the same time, and the coil should be full of glue.
3, the treatment of special parts
(1) Treatment of the end of the coil: The end of the coil is the key part of the waterproof layer of the coil, and it is easy to open, tilt and fall off if it is not handled properly? It should be strictly controlled.
(2) Yin and Yang angle processing
At the corner of Yin and Yang, first reinforce the additional layer with a width of 500MM. The first large-scale construction can be carried out only after the acceptance of the additional layer, and the second construction can be carried out only after the first acceptance, and the longitudinal lap joint is not less than 80-100 mm; For the hole of the pipeline, two additional layers should be made first, and then the hole should be cut into four pieces during the construction of bedding face, inserted into the hole and pasted. After the installation of the pipeline is completed, the gaps around the pipeline should be filled and closed with sealing paste; The coiled material of vertical retaining wall of roof panel returns to 100MM, and it is scraped and pasted from bottom to top with scraper, which has achieved uniform and dense bonding.
4, glue and laying coil matters needing attention
(1) The coiled material should be spread immediately after the cement binder is applied, so as to prevent the water loss in the binder from affecting the bonding quality for a long time.
(2) When scraping the coil with a scraper, pay attention to check whether there are hard particles and other substances under the coil to buffer the coil. If there are, take them out and paste them again. Before the laid waterproof layer reaches a certain strength, people should avoid trampling back and forth on it to avoid the coil bulging. After the acceptance of waterproof layer, protective layer construction should be carried out as soon as possible.
(3) The coiled material must be pasted on the leveling layer without wrinkling or warping, and the pasting area is over 85%.
(4) When the construction temperature of the coil is higher than 25℃, the surface of the coil after construction should be cooled by spraying water immediately and covered with curing to prevent the coil from deforming and bulging.
Nine, waterproof layer detection test
After the waterproof layer construction is completed, apply for supervision to store water and test the water, pay attention to the inspection, and handle any questions in time. After the acceptance of the three parties, the waterproof protective layer shall be constructed. The waterproof protective layer of this project adopts C20 fine stone concrete with 40 thick steel mesh, and the top surface is poured with commercial concrete truck pump. Vehicles are prohibited from rolling on the surface of waterproof layer.
X. arrangement of data
Provide information such as certificate of conformity, permit (registration certificate), test report, retest report and construction record.
XI。 Construction site management
1, the construction site must be clean after work;
2, the rainy season can't construction, be sure to listen to the weather forecast before construction. If it rains, it will be reworked;
3, construction and inspection personnel shall not wear hard shoes, shoes with nails, to prevent the destruction of waterproof coiled material;
4, waterproof coiled material in the construction site should be centralized and unified management, take measures such as rain;
5, construction personnel must wear safety helmet;
6, material storage, warehouse, waterproof work area must be equipped with fire fighting equipment, storage and warehouse each put four dry powder fire extinguishers and two fire sandbox, smoking is strictly prohibited in the construction site;
7, construction personnel 5-8 people;
8, waterproof homework personnel after training and examination qualified rear can show certificates; Construction personnel must hold relevant certificates and wear protective equipment (masks, work clothes, work shoes, gloves, safety helmet, etc.). ), and in accordance with the provisions, shall not violate the rules;
9. Construction personnel should stay away from the construction site when resting at the construction site, and may not walk at the construction site;
10, fire control certificate must be obtained for construction fire;
1 1. It is forbidden to turn on the lights.
Twelve. quality standard
1, guaranteed items:
(1) The varieties, brands and mixture ratios of synthetic polymer coiled materials and cementing materials must meet the design requirements and the provisions of relevant technical specifications and standards;
(2) The details of waterproofing membrane and its deformation joints must comply with the design requirements and construction specifications;
(3) The waterproof layer is forbidden to leak.
2. Basic items:
(1) The base of the coiled material waterproof layer should meet the requirements, be flat and clean, free from sand, empty drum and looseness, and the angle of yin and yang should be at right angles; There is no water in the waterproof layer.
(2) Cement glue shall be evenly coated, and there shall be no brush leakage, pits and other defects.
(3) The laying, overlapping and sealing of coiled material waterproof layer shall comply with the design requirements and technical specifications of underground waterproof engineering, with firm bonding and no defects such as air crack, damage, slip, warping, foaming and buckling.
Thirteen. Finished product protection
1, coiled material waterproof layer has been laid, and protective measures should be taken in time to prevent damage to machines and construction operations.
2, deformation cracks and other waterproof layer before construction, temporary measures should be taken, after the completion of the waterproof layer, should be removed, to ensure that there is no slag in the joint.
3, waterproof layer construction is completed, should do protective layer in time. 4. The finished product shall not be polluted during the construction.
;