Shaanxi Nonferrous Yulin New Materials Co., Ltd. 5×330MW power facility project
Construction technical communication document
Project name Professional construction site: Civil engineering team: Concrete team number ：
Project name Wall plastering Time of presentation 2012-3-26
Presenter Technical presentation person
Place of presentation Construction person in charge
Construction scope and quantity:
This project is the centralized control building construction project for (Unit 1 and Unit 2), with a total construction area of ??approximately 6494.28m2.
All external Wall: matt acrylic exterior wall;
Inner wall: drug storage room, chemical dosing room, condensate treatment room, battery room are made of GFVC anti-corrosion coating (10 thick anti-corrosion mortar surface layer, three times);
The diesel generator room, each power distribution room, clean gas firefighting room, CO2 cylinder room, foyer, corridor, stairwell DC UPS room, electronic equipment room, cable mezzanine, and air conditioning machine room are functional composites Resin emulsion wall (combustion performance level: Class A);
The centralized control building is a metal wall panel wall (aluminum plate, height 3600mm, combustion performance class: Class A);
All other rooms have ordinary latex paint walls.
Construction plan, operating procedures and methods:
1. Material preparation;
Centralized control of building construction according to construction Calculate the quantity of materials required for plastering based on the drawings, propose the material arrival date in advance, and organize the material arrival in phases and batches according to the material supply plan.
2. Preparation of machinery and tools;
According to the characteristics of the project Prepare mechanical equipment and plastering tools for plastering and plastering projects, set up vertical transportation equipment and indoor and outdoor scaffolding, and connect water and power supplies.
3. Preparation before construction;
3.1 Plastering Before plastering, the protruding parts of the concrete surface of lintels and structural columns should be smoothed out. If there are honeycombs, pitted surfaces, etc., the loose parts should be removed, and 1:3 cement mortar should be used to fill them up in layers.
3.2 Plastering Before plastering, clean the dust, residual wood, dirt, etc. on the wall
3.3 Water the wall to moisten it 24 hours in advance before plastering.
4. Plastering construction practices;< /p>
4.1 General plastering grade practices;
4.1.1 Ordinary plastering: finding squares at the sun corners, setting up standard ribs, leveling and trimming in layers, and surface calendering.
4.1.2 Advanced plastering: finding the square of Yin and Yang corners, setting up standard ribs, leveling and trimming in layers, and surface calendering.
4.2 Average total thickness of plastering;
< p>4.2.1 Ceiling: The plastering of lath and cast-in-place concrete ceiling is 15mm; the plastering of prefabricated concrete ceiling is 18mm; the plastering of metal mesh ceiling is 20mm.4.2.2 Interior walls: ordinary plastering The ash is 18mm; the intermediate plaster is 20mm; the advanced plaster is 25mm.
4.2.3 Exterior wall: the wall is 20mm corner and the protruding wall is 25mm.
4.2.4 Stone wall: The wall surface is 35mm
The thickness of each pass of plastering cement mortar should be 5~7mm; apply cement mixed mortar and lime mortar, the thickness of each pass should be 7~9mm. Cement mortar The plastering layer of cement-mixed mortar should wait until the previous layer of plastering has solidified before applying the next layer. The plastering layer of lime mortar should wait until the previous layer is 70 to 80% dry before applying the next layer. Layer.
The thickness of the surface layer of plaster after leveling and compaction: the machete limestone shall not be greater than 3mm; the paper-reinforced lime and lime plaster shall not be greater than 2mm.
Flat and smooth Concrete interior walls and the bottom of floor slabs (referring to prefabricated entire large floor slabs) do not need to be plastered. It is advisable to use putty to spread them over and over, with a total thickness of 2~3mm.
5. Key points for wall plastering;
5.1 Before plastering, you must find the rules, that is, square the four corners, level the horizontal lines, hang the vertical lines straight, pop up the +500mm alignment of each column section, and the line of the wall skirt and skirting board.
< p> 5.2 For the external corners of indoor walls, columns and door openings, according to the design instructions of the centralized control building architectural drawings: the external corners of the interior walls (including door openings) should be made of 1:3 cement mortar foot protection, 2.00M high, Width 500 and apply twice. If there are no special requirements, generally 1:2 cement mortar can be used to wipe out the foot protection. The width of the foot protection should not be less than 2.00M and the width on each side should not be less than 50mm5.3 The base layer is concrete When applying lime mortar, a layer of plain cement slurry should be scraped before plastering; when plastering lime mortar on the base of aerated concrete or fly ash blocks, it is advisable to sprinkle water to moisten it first. The amount of watering should be such that the depth of water penetration into the block is 8~10mm. Watering should be done the day before plastering, but no water will appear on the wall during plastering. Immediately after watering, apply a layer of 108 glue: water = 1:5 solution. When plastering and mortaring, you should first apply a layer of cement slurry with 108 glue (the dosage is 10% to 15% of the cement weight).
5.4 The strength of the base ash on the aerated concrete base should be close to that of the aerated concrete, and the mix ratio of the middle layer of ash
should also be basically the same as the base ash.
Coarse sand should be used for the bottom ash, and medium sand should be used for the middle layer ash and top ash.
5.5 When using a cement mortar surface layer, the base gray surface must be swept or scratched. The surface layer should be carefully rubbed and the surface should be calendered no less than twice. The surface should be applied the next day after covering. Sprinkle water for maintenance. Before the plaster layer is set, it should be protected from quick drying, water washing, impact and vibration.
5.6 The paper ash or hemp ash covering should be done when the base ash is 5-6 thousand years old. If the base ash is too dry, water should be moistened first, and the covering surface should be compacted in two times. Light.
5.7 When plastering the external corner of the wall, first use a ruler to straighten it on one side of the corner, and then apply mortar on the other side of the corner along the ruler.
5.8 Indoor wall skirts and skirting boards are generally 3-5mm more protruding than the gray wall surface. According to the height size, pop up the line. Place the eight-figure ruler against the line and use an iron trowel to cut it evenly. Trim and clean.
5.9. Plastering the walls behind skirting boards, door and window panels, mirror lines, radiators and dense pipes should be done before they are installed, and the plastering surface should be smooth and smooth.
5.10 The exterior wall window sills, window sills, awnings, balconies, roof tops and protruding waistlines should have a running water slope above them and a drip line or drip trough below. The depth and width of drip channels should not be less than 10mm and should be uniform.
6. Precautions for winter plastering
6.1 Insulation measures should be taken for winter plastering. When plastering, the temperature of the mortar should not be lower than 50C. When the temperature reaches 0°C, it is not suitable to carry out winter plastering.
6.2. The mortar plastering layer must not be exposed to freezing in the early stages of hardening: when the temperature is below 5°C, plastering should not be done outdoors. When making a plaster layer of paint or coating walls, salt and calcium chloride must not be added.
6.3 For walls built by the freezing method, outdoor plastering should be carried out after the wall is completely thawed; indoor plastering should be done after the internal wall is thawed before construction. Do not use hot water to wash frozen walls or use hot water to remove frost from walls.
Design changes, equipment and material substitution:
Quality standards and quality assurance measures:
1. Construction quality acceptance specifications for building foundation projects (GB 50202— 2002)
2. Thermal power construction quality inspection and assessment standards (Civil Engineering Chapter 1) (DL5009.1-2002)
3. Shaanxi Nonferrous Yulin New Materials Co., Ltd. Professional construction organization design for section A of the 5×330MW power facility project
4. Safety working regulations for electric power construction (thermal power plant part)
5. Safety technical regulations for the use of construction machinery ( JGJ 33-2001)
6. Technical regulations for the application of cement grouting materials (GB/T 50448-2008)
7. Construction and acceptance regulations for concrete structure projects (GB 50204-2002 )
8. Centralized control building foundation (F3851S-T030303)
9. Centralized control building structure diagram (F3851S-T031701, F3851S-T031702)
10. Carry out construction in strict accordance with the "Construction Brief"
11. Participants must read the drawings and relevant technical information in detail
Safe and civilized construction guarantee measures, occupational health and environmental protection requirements are guaranteed Measures:
1. Construction safety assurance measures
1.1 Set up full-time safety officers on site to regularly check the safety of personnel, lines, equipment and other operations, and solve problems in a timely manner if they are found.
1.2 The construction channel should be kept clear at all times, and protective railings should be erected on the outside to prevent injuries from falling objects from high altitudes.
1.3 Isolation railings should be erected in the construction area to separate each area to prevent accidents caused by people running into the area.
1.4 You are not allowed to drink alcohol during work, and it is strictly prohibited to enter the construction site after drinking.
1.5 Construction workers must wear safety helmets, and safety belts must be fastened if the vertical height of the working surface exceeds 2.0m.
1.6 There must be no old, weak, sick or disabled among the construction workers. If found, they will be removed.
1.7 Special professionals must hold a certificate to work and are not allowed to perform work unrelated to this type of work.
1.8 When pumping and transferring pipes, notify the pump operator in advance to turn off the concrete transfer pump first, then transfer the pipes and place them firmly on the pump pipe rack, and there should be a dedicated person to support the pipes.
1.9 Personnel directing vehicle entry and exit should pay attention to the safety of pedestrians, cyclists and passing vehicles on the road.
2. Use of construction machinery
Implement a strict machinery safety management system. The construction machinery, tools and electrical equipment used must be inspected and accepted according to regulations before being put into use. Only when the inspection and acceptance confirm that they are in good condition and can operate safely can they be put into use. All machinery operators must be trained and certified to work, and must be re-inspected on schedule. During construction, designated personnel are responsible for the inspection, maintenance, and upkeep of mechanical equipment to ensure their integrity, utilization, and safe operation.
3. On-site electricity safety
3.1 Each electrical equipment is equipped with a switch and a fuse. It is strictly prohibited to have multiple machines at one switch. All electrical equipment must be protected by zero connection or grounding.
3.2 All mobile equipment and handheld power tools are equipped with leakage protection devices in the distribution box.
3.3 The lighting circuits shall be set up according to standards. It is not allowed to use one live wire and one ground wire, and it is not allowed to use protective grounding as the lighting neutral wire.
3.4 Welding clamps are equipped with reliable insulation. Simple welding clamps without insulation and welding clamps with damaged insulation handles are not allowed to be used.
3.5 When working in a small space or on a metal frame, an insulating pad is provided to insulate the welder from the weldment.
3.6 Non-professionals are strictly prohibited from operating mechanical and electrical equipment. If someone gets an electric shock during construction, do not pull the person with your hands and cut off the power supply immediately.
3.7 In power systems where the dedicated neutral point at the construction site is directly grounded, a zero-connection protection system must be used, and the shell of the electrical equipment must be connected to the dedicated protective neutral line. Do not connect some devices to ground and others to zero in the same power supply system.
3.8 Wires are installed according to standards. Wires must not be tied to steel bars, trees, or scaffolding without porcelain bottles; blade switches installed in the open air should be installed in special distribution boxes, and iron wires or other metal wires must not be used in place of fuses.
3.9 When using high-temperature lamps, the distance from flammable objects shall not be less than 1m. Generally, the distance between light bulbs and flammable objects shall not be less than 50cm.
3.10 Rubber cables are used for power supply for mobile electric machinery and equipment. Always pay attention to straightening them; when crossing roads, bury them underground or wear pipes for protection.
3.11 The vibrating equipment uses four-core rubber cords and is well grounded. It is operated by dedicated personnel and the operators wear insulating gloves. It is strictly forbidden to place the open vibrator on the formwork or solidified concrete.
3.12 To ensure adequate lighting at night, consider setting up two dysprosium lamps and one iodine-tungsten lamp on the ground, and no less than four iodine-tungsten lamps on the operating surface.
3.13 Electricians on duty should stay at the construction site and are not allowed to wander or leave their posts.
4. Measures to ensure civilized construction
4.1 Establish a civilized construction leading group on site to provide unified command and coordination, formulate specific management measures based on the actual situation of the construction site, and improve safety protection and fire-fighting facilities. Do a good job in joint safety prevention work.
4.2 Strictly implement standardized management of construction construction
4.3 During construction, in order to standardize the site capacity and strengthen the management of civilized construction, this project should do the following:
a) Establish corresponding rules and regulations to standardize civilized construction of projects.
b) Ensure materials are stacked neatly and orderly at the construction site.
c) Reasonably arrange the construction work area to ensure that the layout is orderly, clean and civilized, and do not interfere with each other. The cleanliness and sanitation responsibility areas of each team are clearly listed.
d) Carry out on-site "clean-up" education work to ensure that the work is completed, materials are used up, and the site is cleared, and regular inspections are organized to check the implementation status, and problems are corrected in a timely manner to keep the entire construction site tidy. , strong standards.
Technical record content, witness, and visa requirements:
1. "Construction Log", "Concrete Pouring Record", "Concrete Maintenance Record", and "Concrete Mixing Record" must be completed , "Construction Measurement Record" and other construction records, as well as technical records such as inspection batch and acceptance records of various sub-projects.
2. If the substrate soil quality or other aspects are inconsistent with the design and need to be changed or approved, the change or technical approval procedures must be completed in a timely manner, and the economic visa must be applied for in a timely manner.
Other construction precautions:
Strictly carry out standardized construction in accordance with the safety briefing content to prevent any safety accidents, large or small.
Signature of those who participated in the construction technical briefing (I have understood and mastered the contents of the construction technical briefing and agree to carry out construction according to the contents):
Preparer/Date: Approver/Date:
Instructions:
1. The construction technical disclosure form shall be made in quadruplicate, with one copy each for the technical briefing person and the person in charge of construction, and two copies for the engineering department (original).
2． All columns must be filled in: If the column content cannot be filled in, additional pages can be added.
3． All construction personnel participating in this project must participate in the technical briefing, and all personnel participating in the technical briefing must sign.