Sandwich construction site in Foshan steel is often a small space, the main beam is difficult to enter, even after disconnection in the outside into the connection, the machine is not easy to use, hand-lift carry stitching after lifting.
1, take root
Sandwich safety is one of the key "rooting", the so-called root is the new mezzanine roof load through the main beam radiation to the root, from the root spread to the original structure, like a tree without a strong root tree can not stand.
In the actual construction of the first to detect the media hardness. thickness. Reinforcement, etc., try not to interrupt the main hole when the hole, in strict accordance with the requirements of the depth of the process, diameter hole, according to the roof load configuration bolt. In the anchor must be cleared before the hole, otherwise it will seriously affect the anchorage strength, implant speed can not be too fast can cause drug mixing is not complete, too slow will cause running drugs, will reduce the pull force, after implantation According to the temperature before waiting for construction.
According to the total radiation of the main beam, the thickness and area of the anchor plate are calculated. (The value of the anchor bar is higher than that of the high strength bolts, and the success rate of the reinforcing bar is low.) Of the reason) welding pallets or connecting plate to be split welding.
Installation of the anchor bolt to pull the experiment, the shear force can be carried out on the soil experiment, all anchor plate drilling hole to consider when the situation, can play less equipment, but not less than the design load. If the anchor plate and concrete beams or concrete columns can be gap between the filling or grouting material processing, all the anchor after solidification before loading the main beam.
2, the main beam
The main beam in the sandwich project is the safety key to the second, if a tree even the roots of the tree can no longer withstand external force is also in vain, the choice of the main beam and roof load, span is directly related to the span if you can choose small Cutting, primer and other treatment, to the site after the measurement of both ends of the anchor in the fine-cutting, sandwich works and other steel works is different from the majority of the beam purlin of the beam, or the H-beam steel beam to be polished, Because the box beam must be welded, high cost, weight, hoisting and transportation difficulties, the end of the attic mezzanine construction, the size of the structure of the beam, the length of the length of the indefinite length, so the measured after cutting, if the span of small to try to use steel,
3, connection
Foshan steel construction is the main steel beam connection, 1 welding, 2 high-strength bolted connection. In large projects generally use high-strength bolted or welded, because the venue and welding power to allow this is not to say, in the mezzanine site is often a small space, the main beam is difficult to enter, even after disconnection into the connection, mechanical easy to use Not on hand-lift carry stitching after lifting steel beam connection.
Foshan steel construction safety measures:
(1) construction operations should comply with safety operating procedures, must enter the scene with a helmet, smoking to the development of the smoking room, high-altitude operation of a good seat belt. To establish a prevention-oriented security awareness.
(2) check fire, fence and other safety facilities are perfect, imperfect to be trimmed or added.
(3) should be promptly cleaned up a variety of roads and roads of snow and ice, pay attention to anti-slip fall. Can not be promptly removed due to the laying of straw, wood and other non-slip measures.
(4) sand electric heating pipe should be taken to protect the grounding measures to prevent leakage.
(5) open fire should be away from combustible materials, or to take isolation measures. Strict implementation of the use of fire card system. And carry fire bucket, set up to see the fire.
(6) to protect the safety of workers, dormitory is prohibited within the electric furnace or other dangerous electrical heating equipment.
(7) to prevent frostbite in winter facilities, or gas poisoning incidents.
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