The weight of the wall material presents certain performance requirements are satisfied with the foundation. It must be designed for the specific operating load. In addition to strength characteristics, focus on value. In this case, win screw piles for the foundation. Price with installation of a base is always lower than the tape, poured their own. To discover the screw piles, characteristics and mounting features.
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- 1 What is this- piles for the foundation device
- 2 When the actual construction of pile foundation
- 3 Screw pile-foundation - the pros and cons
- 4 What features are important to consider to buy screw piles for the optimal type of foundation
- 4.1 dimensions
- 4.2 Number of blades
- 4.3 Forms tips
- 4.4 The thickness of the metal stamp and
- 4.5 Type anticorrosive coating
- 5 Engineering and design
- 5.1 Evaluation of the bearing capacity
- 5.1.1 A calculator for calculating the bearing capacity of screw piles
- 5.2 Evaluation on the foundation loads
- 5.2.1 A calculator for calculating the load on the pile or pier foundation
- 5.3 Determination of the required number of piles
- 5.1 Evaluation of the bearing capacity
- 6 Production of screw piles for foundations with their own hands
- 6.1 Videos for the manufacture of screw piles with their hands
- 7 The estimated price of screw piles for the foundation: the price with the installation of "turnkey"
- 8 The cost of the foundation on screw piles for self installation
What is this- piles for the foundation device
Let us consider in more detail what it is. Piles - metal pipes with welded blade to the bottom of the pointed tips. During installation they are screwed into the ground with a slight sealing of the latter. As a result, bearing capacity of the ground is not reduced.
To protect the surface from corrosion processes screw piles surface covered with a special composition. For their manufacturing high strength steel is used a special purpose. Manufacturers offer several types of piles:
- a blender. Used in the construction of houses on the ground with poor bearing capacity;
- having imitation thread over most of the length. Relevant for regions with permafrost;
- with different transverse dimension of the tube. For buildings with a large operational load items are selected larger diameter, with a higher price;
- with different diameter blades. For the construction of houses on a less robust soil with high water contents are chosen bearing with large blades, as compared with the dense and dry soil.
Comment
Mikhail Starostin
Team leader repair and construction company "Home Premium"
"Winding support diameters greater than 108 mm are twisted using a special technique."
When the actual construction of pile foundation
Screw piles were first tested in the middle of the XIX century. Today, the construction of pile foundation in the construction of resort:
- residential buildings, including apartment;
- outbuildings;
- industrial facilities;
- quays piers.
Attention! Screw piles are used in strengthening the base of existing buildings.
Pile supports choose when building a house on the plot:
- well equipped with the landscape;
- with a significant slope or ditches;
- in which the use of driven piles for some reason is prohibited, for example, near the metro;
- with high levels of humidity;
- deep soil freezing.
Screw pile-foundation - the pros and cons
Durability and ease of operation of the structure depends on the base. Considering the pros and cons of houses on stilts, it is worth noting the possibility of:
- Erection on any ground in any climatic zone. Permissible construction area of permafrost and swampy terrain.
- Construction on site with any relief.
- Construction work at any time of the year. Weather conditions are unable to have a negative impact on the characteristics of the formed foundation.
- Fitting the screw portion supports at any ground water level.
- Installation work in a short time. If there is a special technique and a good cross-ground screw piles for the average size of the house can be prepared for one day.
- Reducing the cost of installation of foundations. Price foundation of a third screw oporbudet below another type bases, e.g., tape.
- Devices with warm underground basement insulation correctly performed. Sometimes it designed a technical floor.
- Installation of utilities at the same time with the foundation of the device.
- Perform the installation with their own hands, if the price of the work will be high for the family budget.
The advantages of screw piles should also include:
- resistance to frost heave;
- installation without the preliminary preparation of the pit, so the construction site will not be selected soil debris, which is especially important for small land areas. Also eliminates the need for the additional costs of removal of excess soil;
- dry floors and walls of the house, as a foundation has no capillaries, through which moisture in the soil could get inside the buildings;
- long service life in compliance with assembly technology and the use of quality materials.
The disadvantages of the foundation on screw piles should include:
- Complexity of the device in areas with rock or soil containing a large number of stones.
- Likely to reduce the ability of supporting the foundation by increasing the load on the screw pile. This can cause the destruction of the walls.
- Increased demands on the drainage system, which could result in a price increase on the installation of foundations.
- The destruction of the material by corrosion processes, if a house is erected on site with high chemical aggressiveness soil.
Attention! Screw piles are not recommended to use when building a house near the cell tower, electrified railway, developed mines and quarries, large or high voltage substation power lines.
What features are important to consider to buy screw piles for the optimal type of foundation
Before kupitvintovye piles for the foundation, is to determine the required characteristics of purchased products. They must meet a number of requirements to elevated structure could withstand operational loads. We offer to meet with the characteristics that should be taken into consideration when buying.
dimensions
The linear dimensions of the supports define their load-bearing capacity. the appointment of the acquired products to consider when choosing the diameter:
- for light fences - 57 mm;
- for fences made of profiled sheet or wood, base for an easy everyday construction - 76 mm. Such screw piles have a maximum load-bearing capacity of 3 tons, which makes possible their use in the construction of toilets, arbors, hozblok;
- for one-storey frame buildings, extensions, high heavy fences - 89 mm. The bearing capacity of the supports - within 5 tonnes;
- for the two-story frame buildings, wooden houses - 108 mm. Maximum load-bearing capacity of piles - 7 tons.
The choice of the length of supports influences characteristics of the ground in the construction zone: its type, swelling and freezing depth and relief portion.
Comment
Mikhail Starostin
Team leader repair and construction company "Home Premium"
"If the elevation in the area at different points of the foundation is greater than 0.5 m, it is necessary to select a support, whose length is 0.5 m longer required."
Number of blades
Screw piles can be:
- Single blade. Used for mounting on the foundation screw piles on site with the ground having a high bearing capacity. Their main drawback is the sensitivity to the critical loads. Damage to the product leads to loss of strength characteristics of the support.
- Multi-blade. Suitable in the construction of houses in areas with different types of soil. Characterized by a high load capacity. Can withstand greater operational load of various kinds.
Attention! Preferring multiblade article spiral pile may be selected smaller.
Forms tips
Manufacturers offer screw piles with welded and molded tip. They are more reliable support with cast lugs. Passing through the ground, they are practically not deformed, compared with welded counterparts. They can be used with the device on a dense basement ground with solid natural or manmade inclusions without fear of deformation or destruction of the tip.
Weld tips are inferior in performance cast. They are preferably used in the weak soil. Strength characteristics of these products are directly dependent on the composition and thickness of steel and weld quality. Their price is always lower than that of piles with a molded tip of the same size.
The thickness of the metal stamp and
tubes with different wall thicknesses are used for making bored piles. May be:
- a thin-walled thickness of 3.5 mm;
- thick-walled - a minimum of 6 mm;
- with an average thickness - 3.5-6 m.
The choice affects soil composition and operational load. The final decision is made at the stage of designing the house. Corrosion soil activity affects the thickness of steel used for manufacturing pile blades. If they are thinner than 5 mm, but light construction can be built on such a foundation. For more massive structures must be selected metal thickness 6 mm.
Characteristics of soil affect the composition of the steel used for making the supports. If the soil is weak chemical aggression, you can select the piles of steel St3. With an average of aggression should prefer St20. With a strong aggressiveness should be preferred alloy steel 30HMA and 09G2S.
Type anticorrosive coating
Taking into account the operating conditions of the pile supports, on the surface have to be a continuous protective coating deposited on the entire surface of the product in the factory.
Attention! During installation should preserve the integrity of the coating.
A method for protecting a screw pile surface selected individually. The most widely pokrytiyaiz polyurethane and epoxy resin, and obtained by cold or hot dip galvanizing. Each type has its own distinctive characteristics and performance.
The greatest advantage of the coating are formed by cold galvanizing, polyurethane and epoxy. Possible to use a primer and enamel, which can be applied directly onto rust without prior training base. The polymeric coating is formed by the hot and composition have low strength characteristics.
On screw piles uncoated selling price is always lower. should be applied independently for longer life konstruktsiiego mounted by a suitable structure for the upper and lower parts.
Engineering and design
Characteristics of the foundation are determined at the stage of designing the house. Properly made the calculation to prevent the negative effects during the operation at home. Required assesses the carrying capacity of the base is determined by the load on the foundation, depending on the characteristics of the structure being built, as well as the calculated required number of piles.
Evaluation of the bearing capacity
The bearing capacity of screw piles is estimated for a specific portion. The calculation depends on the pore size used, the type of soil and soil quality determination method. To assess the bearing capacity, you can use an online calculator by going to the requested input data.
A calculator for calculating the bearing capacity of screw piles
Evaluation on the foundation loads
The operational loads experienced during operation of the foundation, depending on the material and area walls, floors, and roof type, slope angle of the roof ramps, as well as the region, which is made construction. Online calculator allows you to get the required data after entering the data listed. Additionally, you can take into account the weight of the raft foundation.
A calculator for calculating the load on the pile or pier foundation
Determination of the required number of piles
Knowing the carrying capacity of a single pile and the overall load, we can determine the required number of piles. For this purpose the total load bearing capacity is divided into a support, and the resulting value is rounded up to the next higher integer.
Attention! The resulting value is not definitive. It should take into account a series of standards that specify the order of arrangement of the pile supports.
Related article:
Pile Foundation: calculation. If there are difficulties with reliable support on a plot selected pile foundation structure. With the materials of this article, any person will be able to draft their own without errors.
Production of screw piles for foundations with their own hands
Not everyone can afford to buy screw piles for the foundation. Prices for high-quality products factory production with good protective coating can significantly increase the cost of construction. Independently produce screw piles for the foundation as follows:
| Photo | Description of work |
 | Perform marking on metal, providing on the blades of the cutting line. |
 | The tip forming via pattern. pipe circumference divided by the number of sectors, for example 4. |
 | From the sheet metal thickness of at least 5mm blade produce future pile. Should use plazmorezom. Internal opening should match the diameter of the pipe used. It provides the bend allowance. |
 | We are pulling away from the cut part of the workpiece. |
 | Starting to bend blades. Set up and cut the workpiece securely fix. |
 | Using a crowbar or other tool, starting to straighten blades. |
 | Removed and turned 180 ° workpiece to perform the bend in the opposite direction. |
 | Using a crowbar, making a bend in the opposite direction. On the lower side, which will curl into the ground, must be less than bend. |
 | Controlled by step using a tape measure. |
 | Similarly we produce other blade. |
 | Performing steps 1-3 form a pile cap screw. |
 | Blades welded to the pipe. The seam must be a solid to withstand the load during installation and subsequent operation. We cover all the product preservative. |
Related article:
The foundation on screw piles with their hands. This technology is used to accelerate the construction is not too heavy buildings and other architectural structures. In this article you will find a step by step construction of structures and useful advice from professionals.
Videos for the manufacture of screw piles with their hands
Not everyone is viewing photos, is able to produce screw piles for the foundation of their own hands. Video allows you to understand the intricacies of the manufacturing process. Repeating the author of the action, you can create high-quality support with minimal financial cost. We offer the following video to see the manufacture of screw piles with their hands.
The estimated price of screw piles for the foundation: the price with the installation of "turnkey"
Price foundation on screw piles "turnkey" is determined by several factors: the characteristics and structure of the area to the place of work performance. Each company sets its own rates. However, the price of the foundation always screw piles 3 × 4 m will be less than the size of the base 9 × 10 m. Mounting one pile will cost an average of 600-2000 rubles depending on its size. on the foundation of "turnkey" prices are given in the table below:
| Size, m | Average price, RR. |
| 3×6 | 18 000 |
| 6×6 | 25 000 |
| 6×9 | 36 000 |
| 10×8 | 56 000 |
| 10×12 | 70 000 |
The cost of the foundation on screw piles for self installation
High installation costs has forced many to perform the installation yourself. In this case, the cost of the foundation on screw piles will consist solely of the cost of acquisition of the supports themselves or their manufacture.
| screw product | Average price, RR. |
| BC-57 | 900–2200 |
| BC-76 | 1 000–2800 |
| BC-89 | 1 100−2900 |
| BC-108 | 1 300–3700 |
| BC-133 | 1600–4600 |
Obviously, the price of screw piles for the foundation of the installation will be shown in the table above. If you do not want to overpay, it is necessary to perform the installation yourself. Share in the comments, which option do you prefer and why.
