1, to mobilize workers, according to the actual situation of construction production, and actively take effective measures to prevent heat stroke, give full play to the effectiveness of the existing cooling equipment, add the necessary cooling facilities, and do a good job in a timely manner to check the maintenance work.
2, care for workers' production, life, pay attention to work and rest, adjust the work schedule, strict control of overtime, before the summer, grasp the high temperature, high altitude work workers' physical examination, not suitable for high temperature, high altitude work appropriate transfer of work.
3, pay attention to prevent the occurrence of infectious diseases, to ensure food hygiene.
4, pay attention to prevent the occurrence of fire.
The second summer rebar construction guarantee measures
1, rebar materials from the steel processing plant transported to the construction site, the transportation process should pay attention to safety, rebar in the transportation process should be tied firmly, to prevent the phenomenon of falling rebar in the transportation process, especially when the rebar is too long, should be added in the vehicle safety warning signs, vehicle turns and up and down slopes should be extra careful.
2, steel semi-finished products after acceptance, should be placed in a specific place, shall not be placed on the slope or in the safety channel, steel should be placed in the open area, construction is convenient and does not affect the traffic.
3, summer construction, rebar processing plant and construction site semi-finished products stacking should be done at the waterproof rust measures, rebar is strictly prohibited random stacking, should be unified arrangements for transportation and stacking, for the flood season, to make preparations in advance measures to clean up the debris and water in the rebar stacking area in a timely manner, rebar stacking should be padded at the bottom of the top of the wood, to prevent water from rusting on the rebar, the rain should be covered with geomembrane, and the steel reinforcement should be covered with geomembrane, and the steel reinforcement should be placed in an open area. Reinforcing steel should be covered with geomembrane, and check whether the geomembrane is leaking, if there is leakage, it should be replaced in time; Reinforcing steel is strictly prohibited to be stacked on the excavated soil, which is easy to make the square logs fall into the soil, so that the reinforcing steel and the soil are in direct contact with each other, which will cause corrosion of the reinforcing steel.
4, because the summer construction outdoor temperature is high, rebar after the hot sun, the surface temperature is too high, rebar workers handling rebar is strictly prohibited workers bare hands directly in contact with the rebar, so as not to cause scalding; rebar covered with geomembrane can also play a role in sun protection.
5, reinforcing steel workers in rebar binding, to do a good job of protective measures, especially in the main body of the outer wall rebar binding, due to the construction of the surface is more narrow, the construction should pay more attention to safety.
Three summer template construction guarantee measures
1, summer construction template centralized stacking, should be placed in the site of the fire fighting equipment to avoid fire caused by dry temperatures.
2, the material should be arranged when the centralized stacking of personnel specializing in inspections, the site must not appear open flame.
3, construction templates, beams, wall templates must be left to clean the mouth or outlet, template mold releasing agent should be covered with plastic sheeting in case of rain, in order to prevent the isolation layer washed away by the rain.
4, steel pipe frame material such as support on the backfill, should be well padded sleepers, pads, after the rain should be checked in a timely manner templates, bracket firmness, stability, and template cross-section dimensions and so on whether there are changes.
5, rainy day use of wooden templates removed and flattened to avoid deformation and timely cleanup, brush mold release agent in case of heavy rain should be re-brush again.
6, the template assembled as soon as possible after the pouring of concrete, to prevent deformation of the template in the sun and rain. If the template can not be assembled in time to pour concrete, and was rained on, before pouring concrete to re-check, strengthen the template and support.
7, templates and components: hardening of the stacking site, inserted firmly. The template supported on rainy day, before pouring concrete after rain, the template and support should be checked carefully to prevent the template support from loosening.
8, large template landing, the ground should be solid, and firmly supported.
9, the template used in the main structure, the square wood after dismantling the timely lifting to the designated yard, to prevent the template, the square wood by the sun and rain.
Four summer concrete construction guarantee measures
1, proportion adjustment
According to the construction environment, reasonable adjustment of summer construction proportion. Adjustment of the mixing ratio should give full consideration to the loss of slump, in order to reduce the loss of concrete slump, to avoid the concentration of heat of hydration, you can adjust the raw material selection of lower heat of hydration of the cement, but also by adjusting the amount of composite additives to slow down the setting time of the concrete in order to meet the construction requirements.
2, concrete mixing and transportation
Mixing concrete in the hot season should take effective measures to control the concrete mixing temperature. Through the use of low-temperature water mixing, the aggregate using cool water rinsing, as well as taking measures to control the temperature of cement into the machine, thus reducing the concrete mixing temperature.
①Summer on the concrete transportation body pouring cool water to avoid the steel tank body heat transfer into the concrete resulting in increased concrete temperature. Every time before the concrete construction, the construction of each concrete truck should be wet with water to cool down, to avoid evaporation of water in the concrete due to high humidity and reduce the quality of the construction of concrete.
②Concrete transportation process, should keep the road flat, smooth, concrete in the transportation process should maintain its homogeneity, transported to the pouring place to do not stratification, no segregation, and has the required slump and air content and other work performance.
3 ③ pumping construction of concrete, the pumping pipe requires the use of felt wrapped, and regularly sprinkled on the surface of the pumping pipe to reduce the pumping pipe due to sunlight, concrete friction temperature rises, to avoid the loss of concrete slump and the phenomenon of blocking the pipe. Pay attention to water and mortar to wet the pump pipe when concrete filling. The transportation capacity of the concrete transportation equipment should be adapted to the concrete setting speed and pouring speed to ensure that the pouring process is carried out continuously. When the concrete transported to the site does not meet the site requirements of the phenomenon of collapse, transported back to the mixing plant, laboratory arrangements for adjustment, the site shall not be unauthorized water for adjustment, if it can not meet the standard, the concrete can be used as a temporary road repair and so on.
3, the pouring of concrete
In the hot weather conditions when pouring concrete, should be adjusted time, proper arrangement of the construction surface, the use of ambient air temperature is lower at night or in the morning for the construction of concrete to avoid high temperature at noon or in the afternoon; equipped with sufficient manpower, equipment and machinery to cope with the unfavorable conditions of the concrete is not, and at any time to control the surface of the concrete and the temperature difference between the outside and the inside of the concrete and the concrete, and to ensure that the concrete is not damaged. The temperature difference between the outside world and the temperature difference between the inside of the concrete and the surface at any time.
①Strengthen the construction of temperature observation, must pay attention to temperature management, construction, if you can control the actual temperature difference is less than the permissible value, you can avoid temperature cracks. Temperature management is based on timely and accurate temperature observations. At present, more methods to measure the internal temperature of concrete, commonly used resistance, thermocouple type and rod, alcohol, thermometer and so on.
②Take appropriate temperature control measures, in the process of concrete pouring, should make the actual measured temperature difference is less than the allowable temperature difference, the measures taken are: reduce the pouring temperature, in the concrete construction should pay attention to the aggregate sunscreen, add ice chips or ice water mixing concrete, transport containers with a lid to prevent sun exposure; reduce the temperature rise of hydration heat, mainly through the selection of reasonable raw materials, the use of good The ratio, to reduce the amount of cement; in order to prevent surface cracks, can be taken to improve the surface temperature of the concrete measures, such as in the exposed surface of the concrete structure covered with heat preservation, set up a heat preservation shed and covered with plastic film.
③ For the casting of large volume concrete, in order to reduce the maximum temperature inside the concrete, can be buried in the structure of the cooling water pipe (serpentine tube) through the circulation of water for cooling. Embedded cooling water pipe concrete its maximum internal temperature can be reduced by 4 ~ 6 ℃.
4 in the construction of the bottom water cement ratio of large admixture of fly ash, not only to meet the strength requirements, but also due to good construction performance, so that the overall success of continuous pouring, to ensure the quality of construction, block concrete inside and outside the temperature difference is always less than 20 ℃, effective control of cracks appear.
4, concrete maintenance
Summer pouring of concrete, such as improper maintenance, will cause the reduction of concrete strength or plastic shrinkage cracks on the surface, etc., therefore, it is necessary to strengthen the maintenance of concrete.
①Conservation is carried out immediately after the completion of the finishing work or after the initial setting of the concrete, and the method of sprinkling is used for continuous conservation. In the first 7 days after the concrete is poured, it should be ensured that the concrete is in a sufficiently wet state, and the age of curing stipulated by the national standard should be strictly adhered to.
②When removing the membrane after completing the specified curing time it is best to provide a moist cover layer for its surface.
③ Mass concrete needs to be replenished with water as the surface loses water quickly due to high internal temperature. Micro-expansion agent only in a sufficiently moist state to have the effect of compensating for shrinkage, reducing the possibility of cracks.
④The water used for concrete curing must be tap water or testing qualified water source, not sewage or acidic water. The number of sprinkling should be the degree of concrete surface wet state.
In short, in the concrete construction, in strict accordance with the construction procedures, construction technology programs to ensure that the quality of construction in line with the requirements of the design specifications, to use scientific methods to meet the needs of the rapid development of engineering construction.
5, concrete quality requirements
①Concrete maintenance should be timely. In the process of concrete pouring, in order to reduce the concrete surface exposure time, to prevent the evaporation of water on the surface of the concrete, available plastic film and other non-absorbent materials, while pouring, while covering, to be the first set of mortar, and then formally enter the conservation process.
② such as artificial sprinkling, spraying maintenance, the concrete surface can be used geotextile, sacks, cotton felt and other absorbent materials to cover (wrapped) tightly, without revealing the edges of the corners, sprinkler spraying intervals are short. Covering inside and outside from beginning to end to maintain moisture, prevent wet and dry cycle. Generally speaking, the temperature of the curing water should not be lower than 15 ℃, and the difference between the temperature of the curing water and the surface temperature of the concrete should not be higher than 15 ℃, in order to prevent cracks on the surface of the concrete.
③ If the surface of the concrete wrapped in plastic film moisture conservation, plastic film should have a certain crack resistance, tensile strength, and flexibility. After demolding the concrete, the concrete surface should be wet with water, immediately wrapped tightly, the plastic film should be tightly adhered to the surface of the concrete, no leakage, no air permeability. During the curing period, water droplets should appear on the surface of concrete from the beginning. In order to keep the surface of the concrete in a moist state, can be regularly sprayed to the plastic film sprinkler, to frequently check the integrity of the film. If found to have plastic film open rupture and other phenomena, to repair the integrity in a timely manner.
4 According to different weather and temperature conditions and different structural characteristics, high-performance concrete curing period should be generally controlled within 14-28 days. In this curing period, the use of insulated curing measures to ensure that the concrete curing humidity to meet the requirements, so that the hydration of the concrete is carried out smoothly.
⑤ High-performance concrete curing should be in charge of a person, the establishment of a special responsibility system. In the maintenance period, we should make timely inspection, find problems, solve them in time, pay attention to details, make records, and fully implement the maintenance measures.
Five prevention of heatstroke
(a) Strengthen the education of heatstroke prevention
The heatstroke prevention team should be regularly on the operation team to carry out heatstroke safety education and publicity work, so that each person grasps the heatstroke prevention and cooling safety common sense, improve the resilience of the operating personnel in the operation and the handling capacity. Each person masters the precautions in the process of summer construction, so that they know how to protect themselves; rescue others. In front of the office of the construction site to post the general knowledge of summer heat, and in the construction site of the blackboard announced the daily temperature, so that the construction workers to understand the day's temperature in a timely manner.
(2) prevent heat stroke precautions
1, to conscientiously implement the provisions of the construction site management, and actively take measures to strengthen the ventilation and cooling of the construction site, to ensure that the site of the adequate supply of tea and water, the occurrence of heat stroke, to timely organization of treatment.
2, to do a good job of construction site hygiene and epidemic prevention, strengthen the drinking water, food hygiene management, strict implementation of the food hygiene system, to avoid food deterioration caused by poisoning;
3, to strengthen the monitoring of the summer disease prone to on-site workers in the occurrence of statutory infectious diseases, food poisoning, should be reported to the Ministry of the project in a timely manner to do a good job in a timely manner to deal with the appropriate.
The Ministry of the project and the offices of the work areas under it place summer medicines and rescue appliances to provide the necessary protective equipment and summer medicines for the front-line workers who insist on construction under high temperature conditions, and the medicines and rescue appliances are:
1) Medicines: cold medicines, fever medicines, diarrhea medicines, anti-inflammatory medicines and health medicines such as anemarrhena, patchouli, and other health care medicines.
3 rescue apparatus: hearing aid, towels, medicinal kit, etc..
(C) specific measures to prevent heat stroke construction
1, reasonable arrangement of work and rest time. Pay close attention to the weather forecast of hot weather, meteorology will be the daily maximum temperature greater than 35 degrees Celsius defined as "high temperature day", more than five consecutive days of "high temperature day" called "sustained high temperature". The "hot day" is defined as "hot day" when the daily maximum temperature is greater than 35 degrees Celsius. Strictly implement measures to avoid high temperatures by "grasping the two ends and resting in the middle", appropriately adjusting the labor and rest system for summer high-temperature operations, reducing labor intensity, strictly controlling the time of outdoor work, avoiding work during high-temperature hours, and ensuring the health and safety of workers. Every day, the highest temperature period 11:00 ~ 14:00 outdoor work is prohibited.
2, strengthen the work of rotation rest. In the summer according to the process of construction, adjust the labor organization, take the way of hard shift, shorten the time of a continuous operation, and strengthen the rotation of work. Strengthen the site inspection, increase the knowledge of heat stroke prevention and cooling propaganda, improve the safety awareness of all staff.
3, to ensure that the site drinking water supply is sufficient. The site should be supplied with enough health requirements of drinking water, effective prevention of heat stroke, to avoid the occurrence of heat stroke.
4, in the diet to regulate, pay attention to nutrition, prepare more vegetables, fruits and other vitamin-rich foods, more green bean soup, more lotus seeds, mint, lotus leaves and round-grained rice, rock sugar and other porridge is not only sweet and refreshing, but also excellent heat medicine, can effectively prevent heatstroke.
5, the construction workers are required to carry heatstroke medicines, such as: dan, cool oil, wind oil, patchouli, tea and so on.
6, improve the production and living environment of the construction site. To conscientiously implement the provisions of the construction site management, strengthen ventilation and cooling to ensure that the construction personnel dormitories, canteens, toilets, showers and other temporary facilities to meet the needs of heat stroke prevention and cooling. Construction site construction site dormitories and canteens to install electric fans, when conditions permit, in the dormitory to install air conditioning.
7, the power distribution rooms, warehouses, paint booths and other flammable places to carry out regular inspections, found that the problem is immediately dealt with, and at the same time equipped with fire extinguishing equipment.
8, on the easy occurrence of personnel heat stroke accidents of dangerous operations, before the construction, must develop preventive measures, and should be carried out level by level detailed safety and technical education.
9, the dormitory area, living area with electricity is equipped with the appropriate power current-limiting protection device and leakage protection device.
10, the project department designated special person fixed point is responsible for equipped with summer cooling supplies, in the wellhead, hole, dolly respectively set up a number of summer cooling points.
11, do a good job of shield machinery construction hardware equipment to protect the work measures, regular procurement of cooling ice, placed in the highest temperature work around the welding area and the operation of the hotter operating position, to achieve the purpose of cooling, the operating environment control at 38 degrees Celsius or less, and to strengthen the operation of the mechanical ventilation equipment and a reasonable layout, to ensure that the air is fresh.
12, the prevention of heat stroke work to each work area, each team, each work surface, where not up to the requirements of this, seriously urge its rectification, the refusal to rectify or rectification is not in place of the work area, to be seriously punished, the suspension of resolute suspension of work, the penalty resolutely punished. During the high temperature period, my project department will carry out a special inspection of each work area to prevent heat stroke and cool down the work situation, for not seriously implement the requirements of the work of heat stroke and cool down, in addition to notification of the project department criticized, but also will be severely held responsible for the responsibility of the work area and personal responsibility.
(D) heatstroke personnel rescue methods
1, mild patient rescue
site operators appear dizziness, weakness, dazzling phenomenon, the operator should immediately stop the operation to prevent secondary accidents, other peripheral operators should be arranged to the symptoms of the personnel to the cool, well-ventilated area to rest, the supply of cool water, wet towels and so on. Only aura performance or light can be given a cool salt drink, oral administration of Rendan, DDT, etc., and notify the heat stroke prevention team to arrange for medical rescue personnel to observe, diagnosis and treatment.
2, serious patients rescue
When the operation site appears heatstroke (accompanied by fainting, shock, severe dehydration, etc.), the operation of the surrounding personnel should immediately notify the project department of the leading group of heatstroke prevention and cooling, and promptly transfer the accident personnel to a cool ventilated area (or air-conditioned room), observe the symptoms, so that the medical staff to come to grasp the first-hand information on medical treatment. The leading group of heat stroke prevention and cooling shall immediately organize ambulance personnel to come to the scene to treat the accident personnel according to the specific situation. Serious symptoms, in the project department medical equipment can not save the case, should be the first time to the nearest hospital for observation, treatment and report to the company.
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