Although the formwork release agent is convenient to paint, it is easy to cause pollution.
11.
When making the formwork, the water content of the formwork shall be strictly controlled, and the support at the junction of beams and columns shall be firm, and the formwork joint shall be tight without gaps to avoid mortar leakage during concrete pouring.
When pouring concrete, it shall be evenly poured along its surrounding layers.
The elevation measurement points of each floor should be no less than 2 for review.
14.
The release agent can be applied by brushing or spraying, but each layer should not be too thick, and the second layer should be applied as soon as possible before the first layer is fully cured, so as to ensure a good combination between the two, so as to avoid peeling and peeling due to too long curing time of the bottom layer.
3.
After the boom extends or the main and auxiliary booms extend, the luffing shall not be less than the elevation angle specified for each length.
The thickness of decoration layer shall be considered during the installation of stair step formwork.
2.
8.
Entering the construction site must comply with the safety operation rules and safety production discipline.
6.
The load shall not exceed 20% of the rated lifting capacity under this working condition, so as to prevent overloading and damage of the lifting mechanism or overturning of the crane.
10.
8.
Therefore, it shall be ensured that the painting is uniform during the painting process, and the joints between reinforcement and concrete shall not be polluted.
The embedded parts and reserved holes shall be compared with the drawings before installation, and shall be accurately fixed at the design position after confirmation.
Over excavation is not allowed before support.
9.
2.
The formwork and support shall have sufficient rigidity, and the formwork structure shall be reasonable to prevent cracks caused by different deformation of each member of the formwork and concrete cracks.
3.
After the measurement and setting out, special personnel shall be organized for technical review and acceptance, and subsequent formwork erection can be carried out only after confirmation.
13.
When transporting soil by truck and shoveling soil by loader, there should be someone to command, observe the site traffic signs and instructions, and it is strictly forbidden to walk around the foundation pit to carry vehicles.
When pouring concrete, water shall be poured in advance to ensure that the wooden formwork is wet and avoid honeycomb, even holes, exposed reinforcement and other phenomena on the concrete surface caused by its expansion in the subsequent works.
Click the blue word | Focus on our source: safety and accident analysis, if the network infringes, please contact us to delete that in order to avoid the safety risks of the more dangerous projects, the construction enterprises should strengthen the safety management of the divisional and sub divisional works of the dangerous projects, earnestly implement the safety production regulations and corresponding rules and regulations, strictly implement the supervision, timely summarize the relevant safety points, and effectively prevent the occurrence of safety production accidents.
When the building height exceeds 30m, an additional elevation control line should be set.
7.
Ventilation, dust prevention, poison prevention and fire prevention measures shall be taken in the deep foundation pit.
Before operation, it is necessary to comprehensively check whether the mechanical and electrical equipment excavated meet the safety requirements, and whether the drainage, dewatering and water collection measures at the foundation pit site are implemented.
When the water temperature does not reach 80 ℃, it is not allowed to drive at high speed.
Soap liquid, talcum powder, lime water and other chemicals shall be used as the release agent.
4.
Strictly implement the construction organization design and safety technical measures, and no unauthorized modification is allowed.
When pumping, the operators in the pit shall return to the ground.
15.
After the foundation pit is excavated to the design elevation, the pit bottom shall be fully closed in time, and the foundation construction shall be carried out in time to prevent the foundation pit from being exposed for too long.
The site for crane traveling and working shall be flat and solid, and a safe distance shall be kept from ditches and foundation pits.
12.
During the excavation of foundation pit, timely cooperate with the anchor rod reinforcement work according to the design requirements.
10.
3.
1 Foundation pit works 1.
5.
Sloping shall be carried out first, support shall be carried out first, and excavation shall be carried out later.
11.
During excavation, if stonework blasting is required, a special safety operation plan including charge calculation shall be formulated, and blasting shall not be allowed until it is submitted to the public security department for approval, and the transportation, requisition, storage and management of blasting equipment shall be strictly in accordance with relevant regulations.
It is not allowed to damage the slope or collide with the support system or retaining pile to prevent collapse.
3 Hoisting and hoisting and hoisting machinery installation and removal works 1.
During the excavation process, changes shall be observed frequently, and emergency measures shall be taken immediately in case of any abnormality.
The upper part of beam formwork and wall formwork must be provided with temporary bracing head to ensure that the width of upper opening of beam and wall is consistent during concrete pouring and tamping.
2 Formwork works and support system 1.
When the water temperature of the internal combustion engine is 80~90 ℃, the lubrication performance is good.
5.
In case of abnormal phenomena such as crane tilt and unstable outrigger during operation, the crane shall be immediately lowered to a safe place, and emergency braking shall not be used to avoid crane tipping accident..
During formwork erection, horizontal and vertical straight lines shall be drawn and vertical perpendicularity control lines shall be set to avoid deviation between the axis position of buildings and the actual position of columns and walls.
During construction, elevation positioning shall be carried out at the four large corners of the building and the elevator shaft, and during construction of each floor, the control points of the lower floor shall be measured upwards by using a laser vertical collimator.
Sufficient elevation control points shall be set for each floor, the root of vertical formwork shall be leveled, and the top shall be set with elevation marks, which shall be strictly followed for construction.
6.
During the operation, the principle of excavation from top to bottom in layers shall be adhered to.
9.
At the same time, it is prohibited to use waste engine oil as the release agent.
16.
2.
The mobile pump must first switch off the power supply.
During construction, grout stop measures shall be taken at the splicing position, and foam double-sided adhesive tape shall be used to pad it between the formworks to ensure that the formwork splicing is seamless, tight and firm.
It is strictly prohibited to pile soil, materials and equipment with overload around the foundation pit, and it is not allowed to set up temporary work shed facilities.
During construction, settlement joints shall be set correctly and the space between expansion joints shall be limited to avoid large cracks in the concrete structure beyond the specified range, which will affect the subsequent construction.
It is strictly forbidden to measure upward layer by layer to prevent accumulated error.
4.
The release agent shall be brushed after the residual concrete slurry on the formwork is removed.
Before the excavation of foundation pit, the geological, hydrological, road, nearby buildings, civil buildings and other conditions shall be checked and understood, and records shall be made.
4.
The elevation of the building floor is controlled by the ± 0.000 elevation of the first floor.
The submersible pump and power supply wire used for foundation pit pumping shall be well insulated and correctly wired.
5.
7.
Errors shall be avoided as far as possible during the measurement and setting out of the formwork axis.
