Ask for advice There is vibration on the floor slab of a brick and concrete house

This is permissible for you to feel like you bouncing after a jump, but it's not always the case. The analysis is as follows: 1. The floor slab of the living room is a two-way slab with four sides (architectural terminology), with a general span of about 4m, and the span is relatively large.

2. The reinforcement of the floor slab is generally round steel, with a diameter of 8mm and a spacing of about 150mm, especially in the center of the floor slab, generally only the bottom reinforcement is configured, and only in the vicinity of the wall (the structure is generally 1 3 slab span), the negative moment reinforcement will be configured (the role of the negative moment reinforcement is to prevent the crack of the floor at the root of the wall). 3. The thickness of the floor slab is relatively thin. Now the specification requires that it is not less than 80mm, to be honest, it is a 100mm thick floor slab, and there will be some small problems during the actual construction.

4. When designing the structure, all the loads (the external force of the building) do not include the force of your high jump on the floor, although this force is not very large, but for a certain point of the floor, this force is very large. To sum up: the floor slab is like a wire bed (10 cm thick, with a steel mesh inside and a layer of concrete wrapped on the outside), what do you think it will feel like if you jump on it?

If you want not to have the situation you said: 1. Increase the diameter and density of the steel bar, 2. Use double-layer two-way steel mesh, 3. The thickness of the concrete floor slab is a little thicker, more than 10 cm. Thank you!

The friend above said that it is a place that should be paid attention to during construction, but it is not the problem of the landlord, right.

The landlord's house lives in a multi-storey brick-concrete structure, clear water refers to the wall that has not been painted, and the brick surface is used as a decorative surface to get the wall.

You jump, it's okay. It can't collapse.

There are many reasons for cracks in the brick-concrete structure floor slab, mainly the change of temperature and humidity, the brittleness and inhomogeneity of the concrete, as well as the unreasonable structure, the unqualified raw materials (such as alkali aggregate reaction), the deformation of the formwork, the uneven settlement of the foundation, etc. Once the cracks in the concrete will affect the entire floor structure, reduce the bearing capacity, and even endanger the safety of personnel.

The best way to repair cracks is the grouting method, the grouting method refers to the chemical grout is poured into the crack by means of pressure, the chemical slurry will automatically penetrate along the crack, due to the small surface tension, the chemical slurry is easy to spread on the surface of the concrete, infiltrate into the crack and fill the concrete void, and then under the action of the curing agent, the consolidation body becomes a whole, because the strength of the chemical slurry is much greater than the strength of the concrete, so it can play the role of reinforcement and reinforcement. For cracks, the grouting method is a near-perfect method.

The vibration and thickness of the concrete floor slab of the self-built two-story building, please tell me thank you to the master who understands.

The problem of the thickness of the cast-in-place concrete floor slab of the self-built two-storey building in rural areas is 80-160mm, and the thickness of the cast-in-place floor slab is different, and the floor slab size and reinforcement are required according to the design requirements, and the thickness of the floor slab of the general civil residence is 80-160mm according to the different uses, bay size, reinforcement, concrete strength, etcNo matter how thick the quarrel is, it will generally add beams, otherwise the weight will be too great. The appropriate thickness is calculated by the designer.

Allowable error -5mm +8mm