When the strength characteristics decrease at the foundation, this will certainly negatively affect the entire structure. Destructive processes occur in the entire structure of the building and, progressing, over time can lead to its complete destruction. The reconstruction of the foundation with screw piles is one of the most effective methods for restoring the integrity of low-rise buildings. The use of this technology allows you to quickly and accurately restore any kind of foundation foundations.
The reasons for the destruction of the foundation
The main factors causing the subsidence of the foundation are various changes in the lower layers of the soil. These processes are physico-mechanical and hydrological in nature. The earth, for example, can sag due to groundwater, nearby construction works using heavy special equipment, etc. Moreover, not only the old, but also the new foundation can suffer.
The sagging soil “pulls” the foundation behind it, as a result of which deformation processes are started. The first sign of its subsidence are crevices in the blind area. Destructive processes begin at the base of the bed layer of the foundation. If an immediate reconstruction of the foundation is not carried out with screw piles, then the bearing characteristics and stability of the building will decrease, which, as a result, will lead to its partial or complete collapse.
Selection of Screw Piles
A screw pile is a welded single-seam steel pipe with a sharp rolled tip. A special blade in the form of a thread is welded to the bottom of the pipe, the size of which exceeds the diameter of the barrel by 1.25 times. Thus, a design resembling a self-tapping screw is obtained.
When reconstruction of the foundation is carried out with screw piles, disadvantages, unfortunately, can also occur. The main problem, due to which the durability of the structure is reduced, is the susceptibility of the metal to corrosion. In this regard, the issue of material selection should be given special attention.
High-quality steel piles, made in strict accordance with technological requirements, must have a corrosion-resistant coating, which includes epoxy resin and enamel. And the best material for the production of piles is galvanized iron. The reconstruction of the foundation with high-quality screw piles is able to extend the "life" of the house for 100 years!
Screw piles differ in diameter, which makes them a universal building material that allows you to quickly and efficiently solve various kinds of tasks.
The number and size of piles are selected taking into account the type of soil, the depth of freezing and the estimated mass load.
Foundation repair technology
The reconstruction of the foundation with screw piles (process photos are presented below) is carried out according to the following scheme:
- Study of soil features.
- Trial screwing one pile into the ground.
- Screwing in piles around the entire perimeter of the structure (the distance from the walls is 20-25 cm).
- Filling the cavity of piles with cement-sand mixture.
- Welding of heads, installation of a structure of channels and I-profiles by welding.
- Raising the house with the help of special powerful jacks.
- Installation of the strapping of the new foundation.
- Lowering the house to the finished foundation.
The fastest and easiest reconstruction of the foundation is carried out with screw piles at structures up to 6x6 meters in area. To carry out a full range of work requires only 2-3 days.
Repairing the foundations of large brick or wooden buildings is more complicated, since it requires the installation of auxiliary piles under the center of the building. For this operation, partial disassembly of the floor is required. However, regardless of the complexity of the task, the reconstruction of the foundation with screw piles is still considered the most effective and inexpensive method. The feedback from a huge number of customers who decided to “reanimate” their real estate using this technology is a confirmation of this.
Technology benefits
The indisputable advantages of the method of restoring the foundation using screw piles, according to users, can be safely attributed:
- No need for large-scale earthworks.
- Simplicity and efficiency of installation.
- The ability to provide the necessary strength and bearing capacity of any type of foundation.
- Durability of the design (subject to the use of high-quality screw piles).
- The ability to repair the foundation on various types of soils and at any time of the year.
- Reasonable cost of work and materials.