How long does it take to lay the foundation of the building?

Generally speaking, it takes more than three months to build a building foundation. Building a house requires building a foundation, because the bearing capacity of the foundation is different. Under the action of house gravity, uneven settlement will lead to house cracking, and the higher the house, the greater the gravity and the greater the foundation bearing capacity (the foundation bearing capacity must be equal to or greater than the house gravity).

: 1. What is the basis? The so-called foundation is put forward relative to the civil structure. In civil architecture, no structure can be separated from the foundation of the building. Especially the subway, it is inevitably caught in the foundation. Foundation is the basic element of supporting structure. Because the foundation is not artificially designed, but naturally formed by the earth for a long time, there is a great difference. Therefore, before designing and building a structure, people can't ignore the understanding of the foundation. Only through repeated practice and testing and accumulated experience can they successfully design and build structures on the foundation.

2. How to prevent the foundation from sinking

1. The shape of the building should be simple, and the elevation difference of the building facade should not be too large. Try to avoid bending and turning on the plane and avoid concave-convex angles.

2. It is necessary to control the aspect ratio of the building. Generally controlled at around 2.5; The smaller the aspect ratio of a building, the better its overall stiffness and the stronger its ability to adjust uneven settlement.

3. Arrange the vertical and horizontal walls reasonably. As far as possible, the horizontal partition wall is generally not more than 1.5 times the building width, and the spacing should not be too large.

4. Settlement joints can be set, and the building can be divided into independent units, and their respective settlements will not affect it.

5. Settlement joints are usually set at the turning point of the building plane, the appropriate part of the masonry load-bearing structure or reinforced concrete frame structure, the part with excessive super-long height ratio and the height difference.

3. What kinds of foundations are there?

1, divided by formation.

(1) natural foundation.

When building a house, if the homestead itself has good soil conditions and strong bearing capacity, it can be simply treated and directly used as a foundation.

(2) Artificial foundation.

In fact, the foundation is basically laid manually in life, and it is rare to build a house directly without treatment. Usually, when the soil is soft or the geological conditions are poor, it is necessary to reinforce the foundation manually. Only in this way can the foundation have enough bearing capacity.

2, according to the shape.

(1) Independent Foundation.

This foundation does not need piling, and the construction is relatively simple and convenient. But its stability is not very good, and it is not suitable for the foundation of self-built houses.

(2) Raft foundation.

The shape of this foundation is like a raft, which can bear all the loads of the house evenly, but its cost is too high for some farmers to accept.

(3) Strip foundation.

This kind of foundation has good bearing capacity, generally no deformation, low cost, and is economical and applicable. However, when there are many floors in the building, it is still not recommended to use strip foundation, which will easily crack the wall in the future.

(4) Pile foundation.

This kind of foundation is used when the land for building houses is soft. Pile foundation has strong bearing capacity and certain seismic capacity, and is usually used as the foundation of high-rise buildings. At the same time, the construction of pile foundation is convenient, and the requirements for materials and technology are not very high, so the construction period is relatively short.