How to install screw piles

Screw piles are a fairly ancient technology that has been successful in the period of Napoleonic wars and was patented in the early 19th century. Today, piles are used in construction as an element of a pile-screw foundation. Installation of piles does not represent anything complicated, performed quickly, and if the base is erected under a single-storey lightweight building, then the piles can even be done their own.

1
Advantages of screw piles

Screw piles are pipes made of steel and empty inside. On one side there is a sharp tip with a cutting blade, which allows you to screw the pile to the ground to the desired depth. After reaching the mark, the bulk stops, the piles are securely fixed in the ground, since the blade prevents them into the opposite direction.

The advantages of screw piles are as follows:

When they are installed, there is no need to plan the platform and provide ways leading to it.
The use of piles does not depend on the season and weather.
Wide possibilities of applying piles, as they are used on swampy soil, and on permafrost.
Low labor costs on a device of such a foundation, if compared with other types of foundations.
Construction work is beginning immediately after mounting piles, without waiting for a shrinkage of the foundation.
When stretching an extension to the building there is no shrinkage of a new foundation relative to the old one.
The installation of piles is allowed in the zone where underground communications are developed.
The pile foundation in combination with reinforced concrete belt will become the optimal solution if the construction is carried out on weak soils, not even excluding.
After curing piles from the soil, they can be reused.

2
Disadvantages of screw piles

Along with numerous advantages, screw piles are not devoid of flaws:

When used in moistened soils, the reaction of which differs from neutral, the service life of the piles is limited. The duration of operation of metal products is 50-60 years, borrowing - much more, reaches 100-120 years.
It is impossible to build on such a foundation high-rise buildings.
With a pile foundation, the construction of the basement is impossible, otherwise the interaction of piles with the soil will be broken.
It requires a complex trim of the base and the creation of a high-quality frame to prevent water from entering the subfield.
When building a pile foundation, it is impossible to use a typical project, calculations are conducted individually for each individual case.

Screw piles are used in the construction of the foundation for temporary and light houses, such as team-shield, wooden baths, household buildings, canopies, fences. Sliding gate with the use of piles is not recommended. They are also not suitable when building the base for the garage.

3
Making screw piles

Screw the pile - construction consisting of 3 parts, which is manufactured as:

The carrier part protrudes. A product is used, the diameter of which is from 85 millimeters and more. Next welded screw, it should be located at the pointed end. The strapping is attached to a special headpoint.
To create the tip of the pipe ends, you need to cut into the sectors of a certain size, facing inside, and then weld to the cone, not forgetting about the rattling of the seams.
For the screw used spent discs or new, cropped by template, or steel in 5-6 millimeters. When choosing an outer diameter, take into account the features of the soil. The screw is done smaller with a deeper pile location.
Hold the screw blank and stretch it using a vice, and attach to the patch. The connection is made by welding. From above, the location of the attachment is recommended at mandatory to cover the anti-corrosion composition or paint.
Now we will produce for piles headplains. Schawler will be fastened for him. Choose such a size of the blades so that they are wider than the pipe, by 30 millimeters.

4
Installation of pile field

The installation procedure of the pile field is as follows:

Prepare a set of tools, including fittings, welding, grinder, construction level, pipe segments, which serve as levers.
Calculate the amount of piles that will be needed when installing the foundation, and their length, as well as make the field marking. For convenience, when marking a plan of structure, divide on rectangles.
Clean the platform from the garbage, remove the top layer of the soil and align it.
At the corners of the site, there are reinforcement bars. For their compound, a strongly stretched, not provistent rope.
Focusing on it, mark all the points, ranging from the place where the rope intersects. When installing, consider that drilling places are located near the reinforcement. To confirm that the distances turned out the same, it is customary to measure the diagonal.
Choose a bur for naming, the diameter of which slightly exceeds the diameter of the pipe.
Piles are installed in bored wells, starting with the corners, and aligned vertically.
There should be the same distance between adjacent products, the more closely you plan to make a pile field, the foundation will get more reliable.
Spinning piles, segments of pipes are used as levers. Scrap is inserted into the pile hole, with which the levers are put on.
Carefully screw the pile so that it reaches the bottom of the well. On the light soils of piles, the length of which does not exceed 5 m, wrapped manually. The mechanical method of wrapping pile implies the use of a mini-excavator.
Test it location. The maximum angle of inclination should not exceed 1-2 degrees at the length of the pile. If the pile left aside, it is not necessary to bring it to it, as it provokes her seating.

Thus, the process of installing screw piles does not imply any specific and complex works, although it is time consuming. Therefore, it is important to use only high-quality piles that will serve you for many years.