Bored pile foundations used in both suburban and urban construction. This technology not only for housing but also for the construction of bridges, tunnels and passages, underground spaces. A distinctive feature of this foundation is the absence in it of a basement. The height of the building on this foundation can reach 250 meters.
Before the construction of the foundation is working on the study of engineering and geological component of the object and information on the state of the foundations of buildings around to eliminate the soil deformation under them.
Work in the construction of such a foundation can reduce noise and vibration components. These factors are crucial in the historical parts of the city. Produced such works using rotary drills. But not always this way, you can achieve the desired depth. Drilling of rock inclusions is conducted using a chisel and the grader. soil properties affect the method of installation of piles.
Bored piles with sealing walls clay solution
These piles are used if the level reaches the underground water. When drilling a well served clay solution which strengthens the walls. Then wellbore strengthening reinforcement and poured concrete using betonolitnoy tube which is gradually removed during the work.
Bored piles using casing
Such pipes may be part of the design to strengthen the walls of the pile. They are installed under the influence of vibration or pressed using jacks. Then well as reinforce and pour concrete. Size broadening in such piles reach 1200 mm.
Bored piles shell
These piles are suitable for sustainable soil and have a reinforced concrete wall with the use of vibration. At the top of this pile part is of solid section. The length of this section is equal to its diameter.
To enhance the bearing capacity of piles in broadening make or use the element deep foundation piles with strengthening bottom cementing and walls - silicate solution. In this case, the load capacity is increased to 200 tons.
Bored pile foundations are used in the construction of the country for the construction of baths, wood, block houses and buildings made of brick. Before laying the foundation of the work carried out by its binding to the countryside, taking into account the general plan and the height difference at the point of construction. Further work is underway already directly on the area where the foundation will be poured. Before starting the drilling point is determined in the markup on the foundation axis.
Since suburban construction is often in the home, the work can be simplified using an unauthorized means, and manual, as in the example with a hand auger drilling. The depth deepens piles 150 mm below the freezing ground and does not undergo the effect of "squeezing" during the winter. Depending on the properties of the soil there are different types of piles.
Bored piles without sealing walls
The walls of the wells in this case lined with polyethylene film or roofing material to prevent leakage "jelly" concrete. Such piles are used only in soils with sufficient strength.
Bored piles using casing
As the casing is generally used asbestos cement, metal or cardboard tube and used as part of a pile construction.
Bored piles using a removable casings
In this method, after 2 hours after pouring concrete casing pulls off, and the space is filled with sand appeared. Piles uploaded in a manner less susceptible to heaving soils.
For greater strength reinforced piles armature which can be cooked in a triangular or square frame. Valve put in such a way as to allow for the release of the foundation piles with a ligament structure above them, which can be arranged in several ways.
The foundation raft with hanging
To use the device of this foundation bored piles with casing. Rostverok Ribbon foundation under the building placed on the ground surface. The distance between them for heaving soil should be not less than 150 mm. cushion device for the foundation is eliminated, thus reducing labor costs. Furthermore, in the building foundation with reduced heat loss due to the absence of contact with the frozen soil.
The foundation raft with tape on the ground
With this arrangement, the foundation raft poured over sand bed and make the formwork for the foundation. Pouring concrete can be carried out simultaneously and in piles, and the very foundation. It is necessary to arrange the air holes in the tab in the formwork pipe.
Cushion for such a foundation is sand and crushed stone layer. For thermal insulation of the foundation is used styrofoam. Rostverok may be made of lightweight aggregate concrete blocks. Such a foundation has high load-bearing capacity.