Construction scheme model of building engineering in rainy season
In rainy season, what problems should be paid attention to in building construction and what measures should be taken in construction?
1 construction measures in rainy season
(1) In rainy season, a special person shall be responsible for releasing the weather forecast and notifying all construction personnel.
(2) Do a good job in the site drainage system, and drain the rainwater from the ground and foundation pit in time to ensure the smooth flow of main transportation roads.
(3) Pay attention to the weather station forecast at any time during concrete pouring, and try to avoid concrete construction in rainy days.
(4) In case of rain, pay attention to the change of water content of sand and gravel after rain, accurately grasp the concrete mixture ratio, and have enough ponchos on site to prevent concrete from being washed away when pouring in rainy days.
(5) Waterproof works should avoid rainy season.
(6) During construction, lightning protection measures should be set at the top of an outer frame, and aerial work should be stopped when the wind force is above 6.
(7) Lightning protection and leakage prevention measures should be taken for on-site mechanical and electrical equipment.
2. Management objective of rainy season construction: The rainy season construction should focus on prevention, take rainproof measures, strengthen drainage, and ensure the feedback of rainy season construction information. Preventive measures should be taken to solve the problems that have appeared in recent years.
3, the rainy season construction preparation work
(1) organizational measures: the project manager is the team leader of the project management department, and relevant personnel participate in the leading group for rainy season construction management, responsible for the rainy season construction preparation, checking the implementation of measures, and dealing with problems arising in rainy season construction.
⑵ Preparation of rain-proof materials: a certain amount of rain-proof and drainage materials and machines (such as plastic sheets, tarpaulins, sandbags, pumps, etc.). ) should be prepared in case of emergency before the rainy season construction according to the engineering situation.
(3) overlay facilities maintenance: temporary facilities on site, such as staff quarters, offices, canteens, warehouses, etc. , should be checked, and leakage prevention and drainage measures should be taken to prevent rain. The roadbed of the main transportation roads on the construction site should be compacted firmly, covered with cinder or natural graded sand, and drainage ditches should be made on both sides of the road to ensure smooth road construction and no water or mud after rain. A layer of plain concrete should be poured on the ground of the gravel yard on the construction site, and the concrete ground should be used as far as possible in the reinforced yard, or sleepers should be added under it.
(4) Protection of raw materials and semi-finished products: materials that are afraid of rain and need moisture-proof should be rain-proof and moisture-proof, and put in the shed or indoors. Thermal insulation materials must be stored in the warehouse, and the materials in the warehouse should be piled high and well ventilated.
5] Protection of mechanical equipment: The switch box of mechanical and electrical equipment should be rain-proof and moisture-proof, and a grounding protection device should be installed. The grounding device of tower crane should be inspected comprehensively. The depth, distance and grounding wire of grounding device and grounding body should meet the requirements of regulations, and the grounding resistance should be less than 4Ω. There is no water between the tower foundation and the building to prevent the tower gene from sinking.
4, the rainy season construction technical measures
A, concrete engineering
In the concrete construction stage of concrete engineering, concrete shall not be poured during heavy rain. At ordinary times, we should always know the weather changes, especially the thunderstorm and windy weather, to ensure the smooth and continuous pouring of concrete and the quality of concrete. Construction of concrete in rainy season should also pay attention to the following points:
(1) Field operators should always measure the moisture content of sand and stone. Before the opening of concrete, adjust the construction mixture ratio according to the moisture content of sand and gravel.
⑵ Fly ash mixed in concrete should be waterproof and moisture-proof, and stored under the outdoor ceiling for three months. If the time limit is exceeded, check it.
(3) Prepare enough plastic sheets to cover and protect the newly poured concrete in case of rain.
(4) When pouring concrete in the basement, attention should be paid to cleaning up silt and sundries, and drainage and waterproof measures should be taken.
B, support the shelf
Scaffolding should be provided with strong enough connection points of wall parts, and the stability of the whole scaffold should be strengthened and guaranteed by the overall stiffness of the building structure. Scaffolds, runways and operating platforms are equipped with anti-skid devices in rainy season.
5, the rainy season construction safety protection
(1) After the tower crane operation is finished every day, the tower arm limiter should be tightened to prevent the tower arm from rotating in heavy rain, which may cause potential accidents.
⑵ Mechanical and electrical equipment used in the open air should have reliable leakage prevention measures.
5, the rainy season construction fire control work
(1) Fire-fighting equipment should have rain and dew prevention and sun protection measures, and the on-site fire nozzle should be higher than the ground to prevent soaking.
⑵ Chemicals, oils and inflammables shall be properly kept by special personnel to prevent them from being affected with damp and deteriorating due to fire.
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