On February 15th, everyone should know that the foundation is the most important thing for a building. Only when the foundation is done, the house will be stronger. When the building is used as the foundation, there will be many specifications. Then

On February 15th, everyone should know that the foundation is the most important thing for a building. Only when the foundation is done, the house will be stronger. When the building is used as the foundation, there will be many specifications. So what are the three requirements of the building for the foundation? What are the common problems in building foundation? Let's have a comprehensive understanding through the residential online side trip.

1. what are the three requirements for the foundation of a building?

1. strength requirements: the load acting on the foundation through the foundation should not exceed the bearing capacity of the foundation, so as to ensure that the foundation will not be damaged because the shear stress in the foundation soil exceeds the strength of the foundation soil, and there should be enough safety reserves.

3. deformation requirements: the foundation design should also ensure that the settlement or other characteristic deformation of the foundation does not exceed the allowable value of the building, so as to ensure that the superstructure will not be damaged or affect the normal use of the building due to excessive settlement or other characteristic deformation.

3. other requirements: in addition to the above requirements, the foundation shall also meet the requirements of strength, rigidity and durability of the foundation structure.

second, what are the common problems in building foundation?

1. Wall cracking

Once the foundation or foundation has problems, it is usually caused by wall cracking. Due to foundation problems, the integrity and bearing capacity of the wall will be weakened or even lost. Settlement joints often appear in practical projects.

2. Broken or arched foundation

The settlement of local foundation changes greatly, and problems in foundation design or construction will lead to foundation fracture.

3. The building is sinking too much

The local foundation soil is weak, the foundation design form is improper, and the calculation is wrong, which will cause the whole building to sink excessively, which will cause outdoor water to flow backwards, and even make the building unusable. For example, the central hall of Shanghai Exhibition Hall is a box foundation, which was completed in 1954. After 3 years, the cumulative settlement reached 18 mm For example, the National Theatre in Mexico City was built on a thick layer of volcanic ash, which sank 3mm after completion, and the hall became a semi-basement, which affected the use of the theater.

4. foundation slip

there are two kinds of foundation slip, one is foundation slip, the other is foundation slip caused by rainfall and seepage after foundation excavation, and the other is foundation is generally weak. If the foundation is unstable, it is mainly because the bearing capacity of the foundation is too large or it is seriously overloaded in use, which leads to sliding accidents.

5. foundation liquefaction damage

loose silt and light clay foundation are easy to liquefy during earthquake, and their strength drops sharply, leading to building collapse and earthquake settlement.

The above contents are all the knowledge shared by Bian Xiao, a residential online website, about the three requirements of the building for the foundation and the common problems of the building foundation. When making the foundation, we must consider the requirements mentioned above, so as to make the foundation of the building well.