It is strictly prohibited to add water to the concrete.
4 during installation, focus on checking the sealing degree of the door leaf, valve cover and other places with rubber plates and strips.
Check the installation quality of the sealing strip, the overlapping form of the sealing strip joint, the firmness of fixation and the uniformity of compression, which shall meet the specification requirements.
3 during the concealed acceptance of the reinforcement works for the protection of closed doors and closed doors, the size, diameter, spacing and perpendicularity of the reinforcement skeleton, as well as the position and direction of embedded parts and pipe fittings shall be checked.
Inspect the appearance quality of the valves entering the site.
Check the quality certificate, permit, production license and relevant test reports of reinforcement, cement, coarse and fine aggregates, protective closed door, closed door, materials and equipment.
Installation of protective closed door and closed door frame wall 1.
Unqualified concrete shall be returned to the mixing plant.
6 before the installation of protective closed doors and closed doors, check the flatness of each door and whether it is damaged during transportation.
In case of brittle fracture, poor welding performance or obvious abnormal mechanical properties during reinforcement processing, the batch of reinforcement shall be subject to chemical composition inspection or other special inspection.
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If there is formwork running and reinforcement displacement, it shall be handled in time, with special attention to the pouring treatment of concrete at construction joints, settlement joints and post pouring belt during concrete pouring.
After reaching the curing age, they shall be sent to the laboratory for testing under the supervision of the supervisor.
6 for construction in winter and summer, the supervision engineer shall clarify the key parts and key contents of construction in winter and summer according to the actual situation of the project, and strengthen on-site monitoring.
Reinforcement processing and installation 1 when the raw materials of reinforcement enter the site, check the quality certificate, including factory certificate, quality assurance certificate and inspection report, and they can only be used after being witnessed and sampled by the supervisor and sent to a qualified testing unit for testing.
Prevent low-grade concrete from being injected into high-grade concrete.
In addition, some structural measures shall be emphatically checked, such as stirrups in the stirrup densification area of frame joints and additional hanging bars or stirrups where there is concentrated load on the beam, which shall not be missed; For thick plates and wallboards with double-layer reinforcement, bracing bars and pull hooks shall be set as required; The strength, thickness and position of the cushion block controlling the reinforcement protective layer shall meet the specification requirements; The position of embedded parts and embedded holes shall be correct and fixed reliably, and the reinforcement around the holes shall meet the design requirements.
Check the vibration, do not miss or over vibrate, pay attention to the position and firmness of formwork and reinforcement, and require the construction unit to send special personnel to watch the formwork.
Let’s take a closer look.
3 during the construction of reinforcement binding and installation, the supervision engineer shall track and patrol the site, find problems, point them out in time and require the construction unit to correct them.
Pay attention to the monitoring of the actual molding temperature, internal and external temperature and temperature difference of concrete to prevent concrete from freezing and cracks; Control the formwork removal time and thermal insulation and maintenance after formwork removal.
Therefore, the quality of main structure and orifice protection are very important during construction.
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5 mass concrete should be poured and vibrated in layers to make the concrete rise evenly along the height.
2.
When positioning and setting out the door frame wall, carefully check the size, focusing on the size in front of the door frame wall and the position and size in the opening direction.
3 before installation, check whether the installation size reserved by civil engineering is consistent with the size of installation valve.
Concrete pouring 1 during concrete pouring, the slump of concrete shall be checked.
Therefore, these aspects will become the key to supervision quality control in the construction process.
4 during reinforcement, check whether the reinforcement height of the threshold meets the building height of various types of doors, and check whether the door frame width on the hinge side and locking side of various types of doors can meet the opening requirements.
4 supervise the construction unit to make test blocks on site and maintain them according to the specification requirements.
5 during the concrete pouring of door frame wall, the supervisor shall urge the construction unit to continuously pour and vibrate.
The pouring should be carried out when the outdoor temperature is low; The internal and external temperature difference of mass concrete shall not exceed 25 ℃.
When the reinforcement binding is completed and the self inspection of the construction unit is qualified and submitted to the supervisor for acceptance, the supervising engineer shall check whether the specification, quantity, spacing, length, anchorage length and joint setting of the bound reinforcement meet the design requirements according to the structural construction drawing.
5 after installation, check the position, elevation and installation quality of the valve.
The coaxiality deviation of hinge made of door frame wall shall be less than 1mm, and the perpendicularity deviation of door frame wall shall be less than 6mm.
Check the coaxiality deviation of the upper and lower hinge.
7 when installing the door leaf, the steel frame of the door leaf shall fit evenly with the steel frame, and the non sticking part and gap shall meet the requirements.
2.
Fixing Socket Waved End Nail Plate
If it is damaged, installation shall be prohibited.
Installation of explosion-proof valve and explosion-proof overpressure exhaust valve 1 review the production license, quality assurance certificate and certificate of conformity of various valves.
The former is made of reinforced steel and concrete, while the latter includes the installation of protective closed door, explosion-proof valve and explosion-proof overpressure exhaust valve.
