Road construction safety knowledge 1. preliminary work for construction
Before construction, the site shall carry out? Three links and one leveling? Handle. If temporary access roads are to be built, the safety of traffic and pedestrians must be ensured. And there are clear signs and traffic control measures. Understand the temporary water and electricity consumption on the construction site through investigation and draw a sketch. Carry out safety education on water and electricity use for all construction personnel, and strictly abide by the system of holding certificates for special personnel.
Before construction, the obvious signs on the buried pipeline should be removed and detailed disclosure should be made to the construction personnel. When digging through dangerous buildings such as cracked walls and skewed chimneys, it is necessary to support and reinforce them in advance. Protective fences shall be set up for leveling points and poles, and feasible safety construction schemes shall be formulated for sections prone to collapse in rainy season.
Hang national safety signs, dangers, warnings, symbols and slogans in the construction area to warn people to pay attention to the scope of protection and dangerous areas.
Knowledge of road construction safety II. Roadbed construction safety
Before subgrade construction, strict construction organization design, strict construction specifications and safety technical operation procedures should be formulated, on-site command and dispatch personnel should be implemented, safety technical disclosure should be made to all construction personnel, and safety protection facilities should be set up at the construction site to provide necessary safety protection articles for construction personnel. Everything is ready before subgrade construction can begin.
During subgrade construction, special personnel must be set up in the construction area for traffic management and unified command of personnel, vehicles and machinery. So as to avoid personal and mechanical accidents. During the construction of excavator, a certain construction site must be guaranteed, and personnel are not allowed to enter the radius of gyration. When the earth-moving vehicle enters the construction site, it must be commanded by a special person to ensure safety. Pedestrians are not allowed to pass through the construction site. When piling soil, the necessary pedestrian passage must be reserved in the soil piling area to avoid piling soil against the wall. When stacking soil, the height shall not exceed 1 m, and a good drainage ditch shall be provided. In the process of rolling construction, ensure that the edge of the roller keeps a safe distance to prevent unsafe accidents during rolling. When using electric rammer, the rope should be firm and reliable to prevent foot pressing from hurting people. The rammer wire must be well insulated, and the starting and braking switches should be sensitive and safe. When people and machines cooperate in construction, there is a certain safe distance between them. During subgrade construction, there should be a special safety officer to manage the site construction safety.
Road construction safety knowledge III. Construction safety of base course and surface course.
During concrete construction at the grass-roots level, attention should be paid to preventing environmental pollution and affecting residents' physical and mental health, and fences should be set up when necessary. No one is allowed to stand around the machine. In order to ensure that the machine can move forward and backward freely, there must be a special person at the scene to prevent personal injury. During paving construction, construction personnel should pay attention to avoid construction machinery in time and obey the on-site command. After the construction, the site must be cleaned up, and the remaining materials must not be dumped on the roadside, which will affect the safety of pedestrians.
Before the ground construction, the traffic in the construction area must be closed with wooden horses and guardrail ropes, and obvious warning signs such as red flag or red light should be set on the guardrail, and special personnel should be assigned to guard the traffic. Before construction, we should also carefully check the completeness of machines and equipment, and do a good job of warranty. In the process of concrete pavement construction, attention should be paid to checking the safety and electricity consumption of transport vehicles at any time. Traffic management must be carried out when passing vehicles are crushed, and attention should be paid to avoiding passing vehicles at any time. Pay special attention to the following construction safety: when installing formwork, all kinds of materials should be piled up neatly to prevent foot mixing and puncture. Template elevation should be accurate during installation, and finger squeezing should be prevented when adjusting template elevation. Before concrete mixing, check whether the transmission part, clutch and brake of the mixer are flexible and reliable, and whether the steel wire rope is broken or damaged. The connecting screws of each part of the mixer should be firm, and the transmission part should have a protective cover. The wire of the motor is very good. When the mixer is rotating, hands or tools are not allowed to extend into the mixing drum. When the mixer fails, the power supply should be cut off immediately for maintenance. When the mixer lifting hopper falls, personnel shall not clean up the garbage under the hopper to prevent accidents. When the downtime of the mixer exceeds 1H, the remaining materials in the mixing drum should be cleaned up. When paving and vibrating concrete, first check whether the vibrator circuit is in good condition to prevent leakage and open circuit, which may cause accidents. During vibrating construction, a special person should pull the flexible cord and move forward with the vibrator at the same time, so as to prevent electric shock accidents caused by wringing wires during vibrating construction.
After the cement concrete pavement is poured, it needs to be cured for a certain period of time. During the maintenance period, heavy vehicles or vehicles with strong vibration are prohibited from passing.
Knowledge of road construction safety. Construction safety of ancillary structures
Precast masonry structure:
When transporting precast blocks, first check whether there are cracks in the precast blocks to prevent sudden fracture and personal injury during handling. When handling, two people should carry each other and pile up neatly and smoothly. In the process of handling, the two coordinated to prevent squeezing hands and feet. When installing, please hold it firmly and move it carefully. After the erection is completed, pedestrians and vehicles are prohibited from colliding during the maintenance period.
When building a well:
Workers must wear safety helmets correctly. Bricks and stones are transported down through chutes or lifts. When lifting, the rope must be strong and fastened, and the upper and lower workers should cooperate with each other. When the build-by-laying well exceeds 1.2m, scaffolding or simple shelves must be erected. When laying, bricks, stones and tools should be prevented from falling and hurting people.