Screw piles are steel pipes, ending with a blade and a pointed tip. They are screwed into the ground like screws.
An important part of the pile is the tip, since it performs several functions at once:
With the problem from the last paragraph most oftencollide in the construction of lightweight wooden structures, using piles of small length. The only way to avoid the encounter with expanded soils is to penetrate the foundation of the house below the freezing line in the construction region.
Prefabricated inexpensive bases for light frame structures - that's where screw piles are used, the advantages and disadvantages of which will be discussed below, but for now we'll deal with their size.
For individual construction most oftenthe following types of piles are used: SV89x250, CB108x300, CB133x350. This abbreviation stands for a screw pile with a barrel diameter of 89 (108, 133) and a helical blade diameter of 250 (300, 350). The smaller the pipe radius, the lesser loads you can trust it. If we are talking about light fences and small garden buildings, a 76 mm pile will fit; about verandahs, gazebos and brick fence poles - 89 mm; about small frame or log houses - 108 mm. And, finally, if you plan to build a spacious wooden house or even a foam block, then for this case you need piles with a barrel diameter of at least 133 mm.
Like all building materials, have screwpiles reviews are negative, but they are dictated no longer by unsuitability or unreliability of this type of foundation, but by improper application. Any construction requires a professional look and at least consultation, and as a maximum - an accurate detailed calculation of all structures and loads.
The erection of a foundation on screw piles has many advantages, such as:
Considering screw piles, pros and cons of theseconstructions, it is impossible not to mention that from year to year they are becoming more popular. And sometimes there are situations that can not be avoided without them.
In contrast to everything that is said about screwpiles, minuses, we will consider what they have in comparison with their concrete "brothers": they have a shorter life due to their susceptibility to corrosion in a humid environment, especially if their producer uses poor-quality materials and processing methods.
In general, the life of piles depends on manyThe parameters to be observed are: on the thickness and steel grade, on how professionally the joint is made, connecting the barrel to the blade, on the quality of anti-corrosion coatings, and on the mineral composition of the soil. If you want to purchase high-quality products, then you need to require all passports, certificates and documents confirming the conduct and results of all proper tests.
Depending on how to exploitscrew piles, pros and cons may appear to a greater or lesser extent. For example, if a pile is used as a grounding method, then it will rather collapse and rust, therefore, in case of breakage of the neutral conductor, the current will flow directly through the body of the structure. Can get screw piles reviews are negative in the event that the house is built within a radius of 50 meters from the power plant or cell towers. In such a terrain in the ground there is a phenomenon called stray current, which accelerates electrochemical corrosion.
Depending on which are usedscrew piles, pros and cons, reviews about them may vary. There are 2 types of them: with a welded tip and with a cast (in this case, the pile is an integral structure). The second option is more expensive, but more reliable, because the weld is the most vulnerable point of the product.
Almost all negative reviews refer specifically to welded piles, because they, as a rule, are made in artisanal conditions with non-compliance with standards and GOSTs.
Welded can be used ifyou need to build minor structures such as fences and outbuildings. In other cases, preference should be given to cast, made of galvanized pipe. Anti-corrosion treatment of the blade does not solve the problem, because during screwing the friction is so high that all coatings are easily erased.
In order not to be disappointed in the screw piles, they should be purchased only from reliable suppliers, as which goods you are sure of.
