Rain period construction of building engineering?

In the rain period construction of building engineering, it is very important to work out corresponding schemes in combination with the actual situation and handle every detail with professional knowledge. Zhong Da Consulting will explain the construction of construction projects in rainy season for you.

Because of its relatively special industry characteristics, construction projects are inevitably affected by seasons, climate and weather. A common problem is that construction works are carried out in rainy season, especially in summer and autumn, so rain-proof construction of construction works deserves more attention.

1, characteristics and preparation of construction in rainy season.

The rainy season construction is mainly affected by the weather conditions at that time, so its main basis is the relevant meteorological information such as rain prevention, flood prevention and typhoon prevention issued by the local meteorological department; At the same time, it is also determined by the influence of rainfall on the building itself.

1. 1 Construction characteristics in rainy season

The rainy season construction is sudden. As we all know, due to the limitation of current scientific and technological development, the weather forecast issued by the meteorological department cannot guarantee absolute accuracy and timeliness, which means that the rain-proof work of building construction needs to be "prepared for rainy season" at any time.

The rainy season construction is a surprise attack. Because the erosion and immersion of rain will cause considerable damage to buildings (such as the structure or foundation of buildings). ), the protection work must be rapid and timely, to minimize the impact and loss of construction.

The rainy season often lasts for a long time, which hinders the smooth progress of projects (mainly including earthwork and roofing projects) and delays the construction period. This should be fully estimated in advance and arranged reasonably.

1.2 preparation for construction in rainy season

Pay close attention to the weather and prevent problems before they happen; Before the rainy season comes, the relevant departments of the construction unit should conduct a comprehensive inspection within its scope, organize forces to check the drainage situation of the construction site, check the leakage prevention of temporary facilities, transform and strengthen the original drainage system, and increase drainage facilities when necessary to ensure smooth water flow and prevent surface water around the construction site from entering the site;

Ensure the smooth transportation roads on site, add slag, gravel or other anti-skid materials to the road surface as needed, and heighten and reinforce the subgrade if necessary;

When making the construction plan in the rain period, we should fully consider the construction situation in the rain period, try to arrange outdoor construction in sunny days and indoor operation in rainy days, and try to reduce the working time and working face of outdoor construction in the rain period;

Conduct a comprehensive inspection and maintenance of the material warehouse, especially around the cement warehouse, so that the roof does not leak rain, the walls do not leak water, and the ground does not regain moisture; Steel should be placed in a dry place, and rainproof measures should be taken to prevent steel from rusting. Waterproof and thermal insulation materials should be stored in a dry place, and should not be affected with damp and rain. Materials placed in the open air shall not be soaked in water to prevent loss and waste;

High-rise building, tower crane, tic-tac-toe frame, etc. Lightning protection devices should be equipped according to the Technical Specification for Safety of Temporary Electricity Use in Construction Sites, and their performance should be checked frequently. If it does not meet the requirements, it should be repaired in time: the mixing machinery and various machines and tools used on site should be provided with awnings, and the concrete and mortar transportation machinery should be provided with rain covers or covers; According to the engineering situation, prepare necessary drainage machinery and materials, and check the insulation and rain protection of mechanical and electrical equipment lines at any time, check whether the zero line and grounding meet the requirements, and set up leakage protectors according to regulations;

Temporary facilities on the construction site should be renovated before the rain period to ensure no leakage, no collapse, no collapse, no water around, and prevent water from rushing into the facilities; Site selection should be reasonable, avoiding landslides, mudslides, flash floods, collapses and other disaster areas. After heavy wind and rain, the foundation and main structure of temporary facilities should be inspected, and problems should be handled in time.

2, the rain period construction scheme and technical measures

2. 1 construction scheme in rainy season

Before construction in the rain period, the construction site should be arranged; The road on the construction site is hardened, and drainage ditches are arranged on both sides of the road; Check the rainproof condition of cement warehouse, material warehouse and processing shed on the construction site to ensure that the shed warehouse does not leak rain.

The main problem to be solved in rainy season construction is rainwater drainage, especially for large and medium-sized projects, and the overall planning of temporary drainage system must be done at the construction site.

Specifically, it includes two parts: preventing off-site water from entering the site and discharging off-site water. Its guiding principles are: upstream interception, downstream dispersion, pit bottom pumping and surface drainage. In the actual planning and design, it should also be comprehensively considered according to the local maximum rainfall and rainfall period over the years, combined with local topography and construction requirements.

Generally, temporary drainage ditches are set around buildings to prevent off-site water from entering the venue. The drainage in the construction site is relatively simple: as long as the corresponding flow rate is determined, the matching water pump and artificial drainage can be selected; The construction site above the ground can be used as long as the corresponding drainage channel does not make the site accumulate water.

In addition, the impact of rain on the construction of sub-projects is various. For some outdoor projects that are greatly affected by rain, corresponding measures should also be taken to make the project go smoothly. Specifically, it includes earthwork and foundation engineering, reinforcement and reinforced concrete engineering, concrete engineering, masonry engineering, plastering engineering, roofing engineering, hoisting engineering, scaffolding, etc. The specific measures have been discussed in many papers and will not be repeated here.

2.2 Technical Measures for Construction in Rain Period

It is forbidden to build a wall in rainy days, and bricks soaked by rain cannot be put on the wall. The wall that has been built should be covered with plastic sheets in time;

Concrete construction should be avoided in rainy days as far as possible. Newly poured concrete should be covered to prevent rain erosion, and the slump can be adjusted according to the actual situation when pouring concrete.

When pouring concrete for beam slab, wall and column, the slump can be reduced appropriately. When beam and slab are poured at the same time, they should be poured along the direction of secondary beam. At this time, if the construction stops in case of rain, the construction joint can be left on the secondary beam plate, thus ensuring the integrity of the main beam.

The plastering project adopts the construction method of sunny outside and rainy inside to prevent the outside from being washed away by rain, and the roof should be completed before plastering without leakage;

Avoid welding steel bars in rainy days, so as not to affect the construction quality. After the rain, the rebar shall be derusted as appropriate, and the rebar with serious corrosion shall not be used in the structure;

Wooden formwork used in rainy days should be laid flat to avoid deformation. After the wooden formwork is dismantled, it should be cleaned in time and painted with release agent. After the heavy rain, you should brush it again.

Before the rainy season, conduct a comprehensive inspection of all scaffolding. Scaffolding poles must be strong, and add sweeping poles. The external scaffold should be firmly connected with the wall.

On rainy days, roads in the fields should be paved with ash or slag.

In a word, the rainy season construction should be as follows: site preparation, technical preparation and material preparation should be done carefully to ensure that all work meets the requirements of rainy season construction; According to the construction characteristics of each type of work in the rain period, do a good job in technical disclosure, and make disclosure to workers before operation; At the same time, strictly implement the requirements of specifications and process standards and the intermediate inspection of rain period construction, and do a good job in self-inspection and process handover inspection to ensure that all work in the construction process meets the standards.

3, the rain period construction safety measures

The safety measures for construction in rainy season mainly include rain, wind, lightning, electricity and flood control.

Rainproof and lightning protection of construction machinery and safety measures for electricity consumption on the construction site; All mechanical operation sheds shall be firmly erected to prevent collapse and leakage; High-rise buildings, scaffolding and structures should be equipped with temporary lightning protection devices according to the regulations of electrical specialty; Mechanical and electrical equipment should be fortified with canopy and installed with grounding protection device, and the leakage protection device of switch box should be reliable; Woodworking machinery, welding machine, etc. Rain-proof and moisture-proof measures should be taken, and leakage protectors should be installed as required;

In rainy days, prevent accidents caused by lightning, tower cranes, people and goods elevators, steel pipe scaffolding, etc. Lightning protection devices must be installed if the construction site is higher than the building; ; Exhaust holes of construction machinery shall be blocked with plastic sheets or other waterproof materials; It is best to move the machinery in the pit to the ground to prevent the rain from being flooded; On-site construction cables should be arranged in a centralized way to prevent disorder, and cables with aging or damaged insulation sheath should be replaced in time; Unnecessary cables should be recovered in time; When working in rainy days, insulating shoes and gloves should be worn when operating live equipment. After the rain, all electrical appliances on the site should be inspected to see if there is potential leakage to ensure the safety of electricity use.

Drainage ditch, foundation pit, pit, etc. It should be set in foundation engineering, fences and warning signs should be set for water accumulated after rain, and pits and wells with foundation pit exceeding 1 m should be supported; All mechanical equipment should be located in a high-lying, moisture-proof and rain-proof place, and a fortified canopy should be built; Scaffolding should be inspected frequently, and problems found should be handled in time or replaced and reinforced; Anti-skid measures should be taken for scaffolding on the road, and it should be cleaned in time after rain, and the safety measures of scaffolding and electrical equipment should be checked at any time; Bare wires are strictly prohibited on site, and special personnel are appointed to maintain and manage power facilities. It is strictly forbidden to change and dismantle the lines without permission, and strictly control various rules and regulations. Anyone who participates in the construction is forbidden to wear slippers, hard soles and other slippery shoes; In case of heavy rain, thunderstorm or gale with magnitude 5 or above, all aerial work and outdoor work should be stopped at the site to ensure the safety of tower cranes, collecting wells and submersible pumps.

Finally, in the rainy season, we should implement the responsibility system for production safety, do a good job in division of responsibilities and organize safety education; It is necessary to carefully organize safety inspection and carry out production activities under the condition of ensuring safety.

The detailed information of "rainy season construction" can be found in the link of Zhong Da Consulting and Design, and all relevant building construction information you want is available.

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