Water supply and drainage for winter construction?

Water supply and drainage in winter construction is very important, and every operation detail is closely related to the project. When dealing with it, the purpose should be clear. Zhong Da Consulting will explain the water supply and drainage for winter construction.

At present, it has entered the early winter season, and the remaining projects need winter construction. According to the requirements of the construction drawing and Code for Construction and Acceptance of Water Supply and Drainage Pipeline Engineering, we will ensure the quality of the project and formulate the winter construction scheme of this project. 1. Trench excavation: In order not to affect the progress of the project and increase the difficulty of excavation during construction, when the freezing depth of the local surface layer is less than 50㎜, the surface layer of the trench will be cut and divided into three parts, so that the excavation progress will not be affected even if the weather becomes cold. 2. Pipeline installation: 1. When installing ductile iron pipes, the storage and transportation of aprons should meet the indoor temperature of -5-30℃. Therefore, heating facilities should be added to the material warehouse to ensure the quality of aprons. Clean the socket face of ductile iron pipe with special tools. In case of cold weather, a charcoal stove can be used to bake the socket face to prevent freezing and frozen soil. 2. Welding of steel pipes: In winter construction, when the ambient temperature is lower than 5℃, the epoxy coal asphalt coating shall not be used as the external anticorrosive coating, and when the ambient temperature is equal to or lower than the brittle temperature of the asphalt coating, it shall not be hoisted, transported and laid. If the temperature is lower than -20℃, the welding shall be preheated according to the ambient temperature. The preheating width of each side of the welded joint is not less than 40mm, and the preheating temperature reaches 100- 150℃. When welding, the weld should be free to expand and contract, and the joint should be cooled slowly; Therefore, it is necessary to build a thermal insulation shed and do a good job of anti-corrosion of the nozzle. Three. Concrete products and well masonry: 1, bricks, stones, blocks and other masonry materials shall not be wetted with water, and impurities such as ice and snow or cohesive soil shall be removed to increase the fluidity of mortar. 2, mortar should choose ordinary portland cement mixing. 3. Frost-resistant mortar should be used in winter construction of cast-in-place concrete and well chamber masonry, and the salt content of frost-resistant mortar should meet the following requirements: Ⅰ. When the temperature of bricks and concrete blocks is 0 ~-5℃, the antifreeze accounts for 2% of the water weight. Ⅱ. When the temperature of brick and concrete block is -6℃ ~- 10℃, antifreeze accounts for 4% of the water weight. Ⅲ. When the brick and concrete block are below-10℃, the antifreeze accounts for 5% of the water weight. Four. Organization measures for project safety production: safety work is an important factor in production, so it is necessary to strengthen leadership and improve safety organization; Safety education should be regular and institutionalized, with strict safety supervision and perfect inspection system; For the sake of scientific construction of construction organization design and technological process, any illegal command and operation are strictly prohibited. All construction equipment and machines must be inspected, repaired and maintained by full-time personnel before use, so as to ensure that they are in good condition. Put an end to illegal operations. Construction personnel must wear safety helmets when entering the site, and fences, indicator lights and safety signs should be set when crossing traffic intersections. Irrelevant personnel are strictly forbidden to watch the whole construction site, and each construction site must have 1 full-time security officer and 1 part-time security officer. In order to strengthen site safety management, put an end to major casualty accidents and control the accident rate of minor injuries below 0.5%, a safety team is set up to comprehensively manage site safety and fire prevention. And there are obvious safety, civilization and fire protection propaganda slogans, and there are people in charge of facility electricity management. 4. 1, safety education should be given to personnel entering the site. Strictly implement safety regulations and safety operation procedures. 4.2. Hang a horizontal safety card on the periphery of the well chamber. Installation shall comply with the relevant provisions of the safety operation procedures. 4.3, special type of work to show certificates. Five preventive measures should be taken in winter. V. Organizational measures for civilized construction of the project: There is absolutely no environmental pollution problem in the company's engineering construction, so we have formulated the following civilized construction measures to ensure that the construction site is clean and tidy and the project passes smoothly. 5. 1, civilized construction measures 5. 1. 1, at the construction site, set up traffic signs, set up fences around the construction area, set up safety lights at night, and properly paste construction slogans to keep the construction site beautiful and clean at any time. 5. 1.2. Establish strict protection measures and systems for finished products, and pile up temporary facilities and all kinds of materials to be neat, orderly and well-defined. Various materials and semi-finished products are stacked according to different specifications, and identification plates are set up. 5. 1.3. The components, semi-finished products and mechanical equipment on the construction site shall be arranged neatly according to the plane layout, so as to ensure the neat appearance and good interior of the equipment. 5. 1.4, the construction is civilized and orderly and will not interfere with the normal life of the surrounding residents. 5. 1.5. In order to ensure that the construction team can devote themselves to the construction of this project with full enthusiasm, we set up a publicity agency at the construction site, set up publicity slogans and blackboard newspapers according to the site conditions, and change the contents in time to effectively praise the advanced and publicize the backward. 5. 1.6, establish civilized construction responsibility system. Divide the area, define the person in charge of management, carry out listing operation, and keep the site clean and tidy. The mixing, transportation and use of mortar and concrete should be done without spilling, leakage and residue. 5. 1.7. No littering is allowed on site. Temporary stacking points shall be set at appropriate locations and shipped out regularly. Remove residual soil, garbage and fluid articles, and take covering and leakage prevention measures, and do not scatter them during transportation. Set up a civilized construction inspection team, and have the right to impose economic penalties on those who violate civilized construction; All kinds of signs and slogans on site shall be clean and tidy, and the construction site shall be arranged in strict accordance with the construction plan; Construction personnel should wear work certificates, work hard and standardize civilized language; All kinds of materials and equipment should be classified and kept, with clear boundaries and neat patterns, and mechanical vehicles should be parked at designated places; Keep the construction site clean and tidy, the roads are smooth, and the construction is convenient without disturbing people; Pay attention to the corporate image at all times during the construction process, and do a good job in the relationship with the owner and the local garrison. Environmental protection measures of intransitive verbs: clearly divide the construction area and people's living area, strengthen the management of the construction area, establish the responsibility area, assign special personnel to be responsible for everything from road traffic, fire fighting equipment and materials to garbage, toilets, kitchens, dormitories, stoves and smoking, and implement the responsibility to people, so as to make civilized construction and environmental sanitation work regular and institutionalized. 6. 1, strengthen the environmental sanitation management in the construction area, attach importance to environmental protection, and take environmental protection as an important part of the construction organization design when compiling and implementing the construction organization design, and earnestly implement it. The construction site should be cleaned frequently, kept clean and tidy, the site should be flat, all kinds of materials should be neatly stacked, and the roads should be smooth. 6.2. Strengthen environmental education, organize employees to learn environmental knowledge, strengthen environmental awareness, and make everyone realize the importance and necessity of environmental protection. 6.3. Carry out environmental protection laws and regulations, conscientiously implement policies and decrees of governments at all levels on water and soil protection and environmental protection, provide relevant environmental protection designs in time in combination with design documents and engineering characteristics, and organize their implementation according to the approved documents. 6.4. Strengthen environmental management, conduct regular environmental inspections, deal with violations in a timely manner, take the initiative to contact environmental protection units, ask for instructions and report environmental protection work, and achieve civilized construction. 6.5, beautify the construction site, eliminate construction pollution. According to the design requirements, the site garbage should be disposed at the place designated by the owner, so as to keep the site clean and sanitary, and minimize the impact and damage to the surrounding green environment during the construction process. 6.6. Establish and improve the environmental protection system to institutionalize and standardize environmental protection. 6.7. Environmental protection organization: the project manager is the leader of the environmental protection team, and the technical director and deputy project manager are the deputy heads. The head of the project management department, the head of the comprehensive office, the head of the project quality and the foreman of each construction team are members. The full-time environmental protection personnel in the engineering management department were appointed as environmental protection engineers, responsible for the daily environmental protection management. Each team has a part-time environmental inspector. 6.8, low noise construction, protect the excavated waste from harm to the surrounding environment.

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