Winter construction application report

Winter construction application report

With the continuous improvement of personal civilization, there are more and more cases that need to be reported. Usually, the report has a lot of content and a long length. So, how to write a good report? The following is my carefully compiled winter construction application report for your reference, hoping to help friends in need.

1 Winter Construction Application Report I. Winter Construction Quality Assurance Measures

1, concrete pouring is all arranged during the day, and the maximum temperature during the day is above 0℃.

2. The new concrete adopts commercial concrete to ensure the stability of concrete quality; Strictly control slump and add superplasticizer, antifreeze and early strength agent; Use silicate 42.5R cement.

3. According to the physical quantity, organize relevant machinery, quilts, tarpaulins and other thermal insulation materials to enter the site in advance.

4. After concrete pouring, cover the exposed concrete surface with waterproof materials such as plastic film first, and then lay thermal insulation materials.

5. Assign special personnel to measure outdoor temperature and concrete temperature during construction, and make records. When the temperature of concrete changes abnormally or is attacked by cold current, measures such as adding insulation layer or artificial heating should be taken immediately.

6. The assembled steel formwork adopts the whole disassembly scheme, which ensures the thermal insulation effect of the formwork and reduces the material consumption.

7. Before pouring concrete, remove the ice, snow and dirt on the formwork and steel bars, and take heat preservation measures for the containers transporting the mixture.

8. Actively negotiate with the owner unit and supervision unit, and take timely measures to improve the design strength grade of concrete.

9. Ensure the smooth flow of information, keep close contact with the local meteorological department, and receive the weather forecast in time to prevent the sudden attack of cold current.

Second, the winter construction safety guarantee measures

1. Anti-skid measures should be taken in winter construction.

2. Clear the snow on the shelf in time after the heavy snow, and check it. Platform. If there is any loosening or sinking, deal with it immediately.

3. Strengthen on-site fire source management and strictly implement on-site hot work declaration system.

4, power switch, control box and other facilities are all locked, and designated persons are responsible for the management, to prevent leakage and electric shock.

Tower crane operation is prohibited in strong winds above level 5 and 6.

Application Report for Winter Construction 2 I. Reinforcement Processing

1, steel welding should be carried out indoors. When it must be carried out outdoors, the minimum temperature should not be lower than -20℃, and snow and wind prevention measures should be taken to reduce the temperature difference of weldments. Contact with ice and snow immediately after welding is strictly prohibited.

2. The temperature of cold-drawn steel bars should not be lower than-15℃, but it should not be lower than-20℃ when reliable measures are taken; When using controlled stress or cold drawing rate for cold drawing, the controlled stress of cold drawing should be higher than room temperature, but should not exceed 30MPa.

Second, the preparation and mixing of concrete

1, when preparing concrete, portland cement and ordinary portland cement are preferred. The strength grade of cement should not be lower than 42.5, and the water-cement ratio should not be greater than 0.5.

2. According to the outside air temperature, the antifreeze above-15℃ is mixed in concrete in an appropriate proportion to improve the frost resistance of concrete.

3. The temperature of various materials for mixing concrete shall meet the temperature of concrete mixture after mixing. Cement only keeps warm, not heated.

4, when mixing concrete, aggregate and sand can not have ice and snow and frozen blocks, and covered with plastic sheets.

5. When mixing concrete, the mixing water is heated to 30-50℃ according to the outside temperature. The heating method adopts high-power electric heating tube to heat the mixing water, and the water temperature is measured by the operator of the mixing station in time. Mixing sequence is to add aggregate, add water, and then mix with cement. The mixing time should be prolonged by 50% compared with normal temperature to ensure that the discharging temperature of concrete mixture is not lower than 10℃ and the molding temperature is not lower than 5℃.

Three, concrete transportation and pouring

1, the transportation time of concrete should be shortened as much as possible to ensure that the temperature of concrete is not lower than 5℃ when it is transported to the site and put into the mould.

2. Before pouring concrete, the snow, ice and dirt on the formwork and steel bars shall be removed, and the temperature at which curing begins shall not be lower than 5℃.

3, in order to ensure the concrete into the mold temperature, concrete pouring should be in the morning 10, make the temperature rise to the minimum temperature above 5℃, and then start pouring concrete.

Fourth, the concrete curing

After concrete pouring, the molded concrete and mould shall be tightly wrapped with materials such as quilts and plastic sheets, and heating measures (brazier or stove) shall be taken at the lowest part of the covering to prevent ventilation and freezing. For the parts that are easy to cool, it is necessary to strengthen the heat preservation, and if necessary, wrap the quilt with an electric blanket to heat and preserve the heat.

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