Waterproof construction scheme of Zhongshenglong basement



1、 Project overview



Project name: basement waterproof construction



Project content: basement waterproof project



Construction period: to be signed in the contract (except for special circumstances)



Safety objective: the project site is designated as a "civilized and safe" construction site.



2、 Basis of scheme preparation



（1） Technical Specification for Basement Waterproofing CJJ62-95;



（2） Code for Acceptance of Basement Waterproofing Engineering Quality (GB50207-2002);



3、 Construction position: all construction waterproof layers of the basement



4、 Waterproof construction design:



According to the actual situation, structural characteristics, use functions, base surface conditions and external environment of the basement of your company, the basement waterproofing requirements. The scheme adopts the principle of "reasonable fortification, combination of prevention and drainage, adaptation to local conditions, and comprehensive treatment", and selects the materials, processes and schemes consistent with it to scientifically and effectively solve the waterproof problem.



（1） : Basement Yuexing APP waterproof treatment scheme



In principle, the waterproof scheme of the basement adopts the two-layer waterproof scheme. The waterproof treatment of the settlement joint should have multiple layers of waterproof, and the internal and external corners of the basement should be made with a 45 degree arc (handled by Party A); Sundries on the surface of the basement shall be cleaned up. The following is a summary of the added projects:



1: Add cold primer 2: full paving method 3: basement base surface treatment 4: basement settlement joint waterproof:






Material preparation:



(1) (Yuexing Brand) APP coiled materials, appearance and performance indicators meet the YXJ-109 standard.



(2) Auxiliary materials: ① primer: for brushing cold primer; ② Rubber modified asphalt adhesive: ③ rubber modified sealant.



(3) Construction equipment: high-pressure blower, small flat shovel, handcart, single barrel, double hole hot-melt spray gun, spray lamp, etc.



(4) Construction organization preparation: all construction operators and management personnel entering the site are waterproof technicians above the intermediate level, and the construction team members are managed by the manager of the Engineering Department and the chief technical engineer.



2、 Waterproof construction:



1. Technical preparation: understand waterproof structure and details.



2. Construction process



Cleaning and repair of base course surface → application of base course treatment agent (rust removal) → additional strengthening treatment of nodes → fixed point, snapping line, trial paving → paving coiled materials → finishing treatment, node sealing → cleaning, inspection and repair → acceptance



3、 Key points for operation:



(1) Foundation house cleaning: before construction, the protrusions on the surface of the base course shall be removed, and the sundries and slag shall be thoroughly cleaned. At the same time, the division joints and settlement joints shall be strengthened.



(2) Brushing base course treatment agent: the brushing part includes all parts pasted with additional layers. The painting shall be thin and uniform without blank, pitting and bubble. The brushing time shall be 1~2 days before the paving.



(3) After the base course treatment agent is dried, the complex parts shall be strengthened and the additional layer shall be pasted. The pasting of additional layers shall comply with the following provisions:



① JS composite waterproof material is used for additional layers:



② Construction requirements for different parts of the additional layer:



a. The width of additional layer at each part shall meet the specified requirements.



b. The wall shall be paved from bottom to top, and the cornice shall be paved from the bottom of the trench. When the trench bottom is too wide and the coiled materials need to be lapped longitudinally, the lapping shall be sealed with sealing materials.



c. The additional layer at the water outlet shall be pasted 100mm inside the inlet.



d. The additional layer shall be pasted completely, and the quality shall be self inspected.



(4) Before the large area paving of coiled materials, the joint sealing treatment shall be done first, and the hollow paving of qualified joints shall be treated, and then the construction shall be carried out from the lowest elevation upward. When paving the coiled materials of ditches and eaves gutters, they should be paved along the direction of ditches and eaves gutters, and from the lower opening to the water separation line to reduce overlapping. The short edges of two adjacent coils shall be staggered by not less than 50mm. Then locate and scribe.



(5) Spray gun fusing and paving: generally, three people work in a group, one for holding the spray gun, paving and rolling edge. Align the bottom surface of the coiled material asphalt film downward with the chalk line, use the flame fountain gun to align the joint surface of the coiled material and the base course, and heat the coiled material and the base course at the same time. The nozzle head and the heating surface are about 50~100mm. The flame is baked until the asphalt is melted. Paste it immediately, and then compact it. Asphalt is extruded from the edge.



(6) Bonding of lap joint: Before bonding the lap joint, the anti sticking isolation layer within the overlapping width of the upper surface of the lower coiled material shall be melted and burned first. The operator shall hold the hot plate and spray gun with one hand to make the spray gun close to the hot plate and melt and burn 50~100mm away from the coiled material. The edge of the lap line shall be retreated. In order to prevent flame from burning other parts of coiled materials, the hot plate and spray gun shall move synchronously. After all pasting is completed, carefully check the waterproof quality to ensure that it meets the standard at one time.



(8) The waterproof treatment of the expansion joint waterproof layer shall be strengthened. JS shall be used to seal the edge of the concrete lap joint, and then the cover plate shall be sealed. The gap between the covers shall be lapped with 50cm wide APP.



(9) Clean up the garbage and return it to its original location.



(10) Submit to Party A for acceptance