2. Engineering treatment scheme and treatment material selection and technology
In order to better maintain and manage the external wall waterproofing, a set of feasible maintenance scheme is formulated according to the actual situation. Choose jointing putty, thoroughly repair loose cracks and holes, seal the joint between window frame and wall, and then spray transparent colorless silicone waterproofing agent on both sides (construction technology); Debugging special hanging board for high altitude; Clean up the construction base; Sealing the seam between the window frame and the wall; Embedding the surface, hole and big gap of the external wall; Re-prepare the waterproof layer of the expansion joint reserved for the roof and external wall; Grouting technology is used to close and compact the large area of wall hollowing; Brush transparent and efficient waterproof glue film on the joints of all tiles on the whole external wall surface; Spraying external wall waterproofing agent twice on the whole external wall surface; Accept.
Key points of construction operation:
(1) The joint between window frame and wall is waterproof and sealed, and foam caulking agent and sealing material are used successively. Foam joint sealant is a one-component polyurethane foam joint sealant. The sealing material is one-component sealing and filling waterproof sealant.
(2) Waterproof sealing of expansion joints is reserved for external walls, and waterproof sealant is filled with one-component sealing.
(3) Before waterproof sealing of external wall holes and large cracks, use tools such as water spray gun to clean the waiting parts of external wall, expansion joints and window frames, so that the external wall and joints, holes and holes under construction are free of oil, dust and loose cement particles. After it is dried, the holes, holes and seams will be embedded with waterproof sealing materials to make them dense and consistent with the original color, and then carefully constructed with quick plugging agent and transparent waterproof glue film.
(4) The external wall of ceramic tile is hollowed and cracked in a large area, and inorganic water-stop grouting material is used for construction.
(5) The whole external wall tile jointing agent is waterproof and sealed, and high-quality and efficient environment-friendly jointing materials are adopted.
(6) The integral strip tile exterior wall is waterproof, meticulously constructed, efficient and environmentally friendly. The material has the characteristics of excellent waterproof performance, good air permeability, convenient construction, safe use, reliable quality and good durability.
(7) Comprehensive inspection and timely treatment of water leakage or coating leakage.
(8) Water spraying test and acceptance.
Three. The estimated construction period of this project is 7- 10 days. The specific operation is as follows:
1: Tile gap is sealed for two days, window gap is sealed for two days, and waterproof agent is sprayed for two days.
2. The acceptance (trapping) lasts for two days. In case of irresistible natural factors, the acceptance will be postponed.
IV: The warranty period of this project is two years. There is leakage during the warranty period, which is a quality problem. Party B shall be responsible for free maintenance.
Technical safety disclosure of external wall waterproof maintenance construction;
In order to ensure the smooth progress of the external wall waterproof maintenance project, for the sake of safety, the following safety disclosure is made.
1. Firmly establish the idea of "safety first, prevention first", so that every employee has a strong sense of self-protection.
2. Correct use of personal protective equipment according to operation requirements. When entering the construction site, you must wear a safety helmet and fasten your hat belt. When working at height, you must wear your seat belt, and you must hang it high and use it low.
3. Workers entering the site must go through three-level safety education, and they are not allowed to enter the construction site without three-level safety education.
4. Special types of work should be operated by professionals and trained to obtain operation certificates.
5. Don't smoke and play in the construction site, concentrate and don't do anything unrelated to work.
6. Pay attention to the safety protection of the "four ports" during construction, and pay attention to the ditches, pits, nails, steel bars, etc. at the site to prevent accidents.
7. When working on the construction site, it is necessary to check whether the job site is safe in advance, and the construction can be started only after the safety is confirmed. If there are hidden dangers, the construction personnel have the right to refuse the construction and report to the relevant departments.
8. It is forbidden to wear shoes with hard soles and slippery nails on the construction site.
9. Workers engaged in aerial work must undergo physical examination, and those who suffer from high blood pressure, heart disease and others who are not suitable for aerial work cannot engage in aerial work.
10. Sufficient lighting equipment shall be provided in places with insufficient light or at night (the voltage shall not exceed 36V).
1 1. During construction, if the upper and lower floors are working at the same time, a special protective shed or other isolation facilities must be set between the upper and lower floors, otherwise the operators are not allowed to work under the same vertical line.
12. Scaffolding and carriageway under construction should be cleaned at any time.
13. Strictly carry out the operation procedures during construction, do not command or operate illegally, have the right to refuse the instruction of illegal operation, and have the responsibility to stop others from operating illegally.
14 The summer construction climate is hot and the high temperature lasts for a long time, so it is necessary to formulate heatstroke prevention and cooling measures.
15. The bottom of the ladder used for construction should be solid and there is no anti-skid device. Ladders should not be used to cushion things. There should be a safety chain in the middle of the ladder (herringbone ladder), and the upper end of the ladder should be fixed.
16. When working on a ladder, the operating force should not be too great, and someone must take the escalator. Construction personnel are not allowed to stand on the top two steps of the ladder to prevent accidents.
17. When working on a shelf or ladder, pipe fittings and tools are not allowed to be thrown up and down, and objects such as handles are not allowed to be thrown up and down on the shelf or ladder. Tools should be packed with toolkits.
18. Wear protective glasses when drilling, and check whether there are any unsafe factors around. Don't push too hard, don't push too hard, and pay attention to the splash of the drill bit.
19. In principle, the distance between the distribution box and the switch used in the construction shall not exceed 30m, the horizontal distance between the switch box and the fixed electrical equipment controlled by it shall not exceed 3m, and the distance between the switch box and the hand-held power tool shall not exceed 5m.
20. The electrical appliances in the distribution box and switch box must be reliable and intact. Damaged and unqualified electrical appliances are not allowed. Switchgear must ensure that equipment is used for power isolation under any circumstances.
2 1. Operators who use electric tools must know their mechanical properties, and their operation methods should always check their mechanical properties before and during operation, so as not to make the machinery run with diseases. If problems are found, they should be reported to relevant personnel in time, and they should not be disassembled without permission, and can be reused only after professional maintenance.
22. The electric box and manual electric tools on the construction site must be connected by electricians, and the electrical components in the box must be in good condition and reliable. Copper wire or iron wire shall not be used for insurance in the box.
23. When using the grinding wheel cutting machine on site, the switch should be equipped with a point-moving switch device, and it is forbidden to install a reverse switch. The grinding wheel drive belt and transmission shaft head cover shall be complete and firmly installed, and the cutting point shall be flexible and intact.
24. A shielding plate should be set before the chip of the grinding wheel cutting machine to prevent the chip from scalding people or causing fire. It is forbidden to use grinding wheel cutting machine for polishing.
25. It is forbidden to grind the grinding wheel. If the outer diameter edge of the grinding wheel is damaged or the remaining diameter is less than 250mm, it should be replaced.
26. When using a pistol drill, the operator shall not wear gloves, and shall not use too much force when drilling, and shall wear protective glasses, and the drill must be clamped.
27. When using the grinding wheel cutting machine, the operator should stand on the left side, and the cutting piece should be firmly fixed. The cutting piece cannot be cut by hand. Hands cutting pipes and cutting parts should not hold both ends of the pipe mouth and cutting parts to prevent burrs from hurting people.
28. When using the electric hammer, the operator should pay attention to the function of the electric hammer. When using, the force should not be too strong, and the electric hammer bit should be tightened.
29. When using all power tools, check in advance whether there is leakage phenomenon of power tools and whether the plugs and lines are in good condition.
30. In the process of construction, the operating procedures of each working procedure must be strictly implemented and taken seriously, and reckless risks are not allowed. If there is any violation, it will be dealt with seriously once it is found.
3 1. During the construction, the construction team should correctly use protective devices and measures, all kinds of protective devices, protective measures, warnings, safety signs, etc. Shall not be dismantled and moved at will.
32. Team members have the right to refuse to command unsafe places in violation of regulations, and report to relevant personnel for handling.
33. The team leader shall abide by the rules and regulations of production safety, lead the team members to work safely, conscientiously implement the relevant safety regulations, and put an end to the phenomenon of three violations.
34. In case of safety accidents during construction, rescue personnel in time, protect the site and report to leaders at all levels in time. When rescuing personnel, correctly rescue the accident personnel and send them to the hospital in time.
35. The team should have a good safety meeting on Monday, make records and explain the safety of different parts of the working environment every day.
36. Concentrate on your work, stick to your post and observe labor discipline. Special types of work shall be operated by professionals and shall not engage in other work other than this type of work.
37. The construction site shall be kept clean and civilized, and the construction personnel shall be listed for posts. The construction site team shall not bring in personnel irrelevant to this project.
38. Personnel in the construction site and warehouse shall not smoke, keep the warehouse in good sanitation, and shall not use electric stoves and other illegal items in the warehouse.
39. The site construction must pay attention to the problem of disturbing people. Once it happens, distinguish the responsibility and deal with it seriously.
40. The construction site personnel shall abide by the above terms and relevant safety regulations and shall not violate them.
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