Building foundation system

To build a house, what a home builder company บริษัทรับสร้างบ้าน is often given priority is the foundation If the foundation is good, the stability will be attached to the frame of the house, it will be better.

In general, for home builders, home builders must have a lot of knowledge about foundations.

The foundation is the part at the bottom of a building. In which part of the foundation, wholly or partially, is below the soil surface, the editors are of the opinion that the foundation is the most important part that should be paid attention to while doing the actual construction on site. The foundation has the main function of Support and fasten the structure of the building at the top of the whole house. and transfer the weight of the building into the soil under the foundation Since the foundation serves as an important link for the weight transfer of a building, the foundation is therefore designed to support the shape of the building and can transfer loads to the basement with different properties depending on the differences. by area or basement without causing too much subsidence

Generally, home builders รับสร้างบ้าน must have a lot of knowledge about foundations. The details of the foundation are as follows.

Most of the weight exerted on the foundation is the sum of the static load and the building’s roaming weight. In addition to supporting such loads, the foundation must also be responsible for holding the entire building above it to prevent it from moving, turning or lifting, as well as securing the building to be able to withstand earthquakes or the movement of soil around the building. and groundwater In some cases, foundations should be designed to be able to resist the cutting forces or pulling forces from the structure on the ground.

  • The soil pressure exerts lateral to the wall of the soil to the basement.
  • bottom resistance Resistance to sliding of the building due to the lateral force on the building
  • Unevenly distributed forces on the soil due to lateral forces acting on the building.
  • Skid resistance. due to the friction between the foundation and the soil under the foundation
  • The building above the ground.
  • Attaching the building to the foundation There is a need for resistance sliding, lifting, or turning
  • underground structures
  • Foundation
  • soil layer or rock

The collapse of a building is the slow sinking of the structure as the soil beneath the foundation converges together under the load of the building. while the building was under construction Some subsidence began to occur. When the weight of the whole building gradually rise pressed into the foundation and the foundation was pressed into the ground. This leaves less space between soil particles for air and water. Coagulation under such loads takes place relatively quickly. If the force is applied on sandy or gravel soils, it will be good in terms of compaction and will not sink much in the future. in the case of clay Cohesion by force acts to reduce the voids within the soil mass slowly. The higher the humidity, the slower the clay soil. because the gap is filled with water and continued to deteriorate for a long time

A good foundation design should have a uniform and similar distribution of the soil load under the foundation throughout the building. to achieve minimum subsidence and uniformity throughout the building. In such cases, this can be done by calculating the ratio of the weight of each column to the load capacity per square meter of soil. This is equal to the amount of area that needs to be spread for the foundation.

Unequal subsidence within the same building is like a downward movement of some ton columns. Due to the tightness of the soil under the base is not the same. This will cause the building to deteriorate and split. and if more occurs, the stability of the structure will be lost.

2.Type of foundation

The foundation system is Assembly or coordination of building columns or load-bearing walls with stanchions to transmit weight through the foundation plate into the soil which has a variety of formats

  • Basements, which may be wholly or partially below the surface, are constructed from continuous load-bearing walls. to protect the soil and moisture below. as well as supporting the weight of the building above to transfer the weight to the bottom
  • A bunting or basement. which is built from the surrounding wall or from the pole It is intended for laying systems such as water pipes, electricity, etc.
  • Reinforced concrete foundation slabs are intended to support the weight of one or two floors of a building from load-bearing walls or load-to-earth columns. When the soil has sufficient mechanical properties to be able to support the weight distribution of that volume. without having to drive a pile
  • A pole in the case of raising the building above the soil level. (But the area under the base of the pier is smaller than that of the foundation plate Therefore, the mechanical properties of the soil must be checked that enough to support the weight under the small cross-section of the pole?)

Foundations can be divided into two types: shallow foundations and deep foundations.

shallow foundation

Shallow foundations are used where the soil layer near the ground surface has mechanical properties. or is capable enough to bear the weight of the building This type of foundation is supported by the building’s poles. and transfer the weight from the base of the pole directly to the ground below

deep foundation

Deep foundations are used where the shallow soil layer under the foundation is not suitable or is strong enough to withstand loads. The foundation needs to be deep in order to be strong enough. The deep foundation is used by a pile system. Used to transfer the weight of the building through the unsuitable soil layer into the appropriate soil layer below. Or is it deep enough to allow friction between the pile surface and the soil layer enough to resist the weight of the building above?

Factors to consider when choosing and designing a foundation for a building are:

  • Form and size of building weight.
  • Soil and groundwater conditions.
  • Topography of the building construction site.
  • Impact on adjacent land.
  • Building control laws.
  • Construction methods and safety factors.

Foundation design requires a structural engineer. However, if the building to be designed is a small residential structure Engineers should be asked to survey the soil layer. To provide information for structural engineers to design foundations.

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