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Screw pile fence: fence for unstable ground

Screw pile fence: fence for unstable ground


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When planning the construction of a fence on the site, each owner wants to get a reliable, durable and at the same time aesthetically designed fence that will protect his property from prying eyes and uninvited guests. A fence on screw piles is the optimal solution for arranging a solid fence, the construction of which does not require large financial investments. Screw piles, which have become widespread in suburban construction in recent decades, make it possible to erect a reliable support even in conditions of floating unstable soils.

What is the advantage of pile construction?

They are widely used in construction due to a number of indisputable advantages:

  • Possibility of installation in difficult ground conditions. A fence on screw piles can be erected not only on peat bogs and loams, but also on any soils with a high level of groundwater occurrence. It is possible to mount piles even in swampy areas, on heterogeneous reliefs and slopes with a large height difference.
  • Construction in any season. Screw piles are easy to install in all weather conditions. No wonder they are actively used in construction, even in permafrost conditions.
  • Ease of construction. Screw piles for a fence are metal pipes with welded or cast ends, which, like screws, are simply screwed into the ground. Screws can be screwed into the ground manually without the use of construction equipment.
  • Installation speed. It takes no more than 20-30 minutes to screw one pile. You can build reliable posts on a screw base in just a couple of days.
  • Long service life. Screw piles can serve for about 50 years. If, before installation, they are additionally treated with an anti-corrosion compound, then such products will last more than a hundred years.

Screw piles for fences are one of the most economical options for arranging a reliable support. In comparison with the same strip or columnar foundation, the cost of a screw base is 40-50% cheaper.

In addition, the piles can be reused. This makes it possible to dismantle the support at any time and install it at any other place on the site.

Screw piles are a universal type of foundation that can be laid both under fences in private household areas, and under heavy multi-storey buildings for housing and industrial facilities.

We select a suitable pile option

The bearing capacity of the piles directly depends on the pipe diameter. To erect a fence on piles with your own hands, it is enough to use pipes with a diameter of 54-108 mm, which have a wall thickness of 2-8 mm. Pipes with a diameter of 54 mm are intended for the construction of a wooden picket fence, as well as light fences made of plastic or metal mesh.

Piles d = 89 mm are able to withstand the load created by metal fences or corrugated board fences. The loading characteristics of piles d = 108 mm are quite high: they can withstand not only lightweight fences, but also greenhouses, terraces, gazebos and other elements of landscape design.

For a more accurate determination of the length of the product, it is necessary to pre-screw. The immersion depth of the soil pipe depends on the composition of the soil: it can be deepened both by 1 meter and 5 meters. On average, the piles are screwed to a depth of 1.5 meters.

It is convenient to use screw piles because they do not violate the landscape pattern of the area, since they pass the soil layers pointwise

The most important thing worth mentioning at this point is that on sale you can find special piles for fences, in which holes are already provided for mounting fence spans.

Basic rules for installing a "screw" fence

Before erecting a fence on piles, a test screwing should be carried out, thanks to which it is possible to determine the limit of deepening of the structure and the quality of the soil itself. The rules for laying the foundation below the level of freezing of the soil should be strictly adhered to when erecting a fence on moisture-saturated soils.

This is necessary so that as a result of seasonal fluctuations of the soil and under the influence of frost heaving forces, the support during operation is not pushed to the surface, but is reliably fixed in the soil layers.

Screw piles, like other supporting structures for the fence, are installed at a distance of 2.5-3 meters. Having decided on the location of the fence and calculating the required number of support pillars, you can start breaking down the tentative pegs, in the place of which piles will be erected in the future.

Piles can be screwed in both manually and with the use of small-scale mechanization. It is most convenient to screw the piles not alone, but with two assistants.

The use of a lever, which can be made from a metal rod, will greatly facilitate the installation process.

To create a lever at the upper end of the pile, in which there are technological holes, ordinary reinforcement d = 3 cm is inserted. On both sides of the reinforcement, pieces of a square pipe are put on, which will subsequently act as a lever. The optimum arm length is about three meters.

To simplify the work of manually erecting a screw base, you can use a special two-handed gate with a clamp, which looks like a pipe wrench. With this tool, it will also be convenient to control the verticality of screwing the pipe.

Piles must be screwed into the ground at a right angle, strictly maintaining their verticality and location in the plan

If you want to save time and do not feel sorry for the financial resources for this, feel free to hire professionals. Special technique will help with large volumes and limited time frames

There are also special machines for screwing piles, with which you can control the verticality of the structure relative to its axis. Vertical immersion is necessary so that as the screw deepens, the space between the blades is compacted, and the building structure gains strength and stability.

After installing the piles, it is necessary to trim to the desired level. It is easier to control the height and horizontalness of the aboveground part of the piles using a level or hydraulic level

If you are making a heavy fence, then it is better to seal the place where the piles exit from the ground with a special M-150 mortar. The seal will protect the interior of the structure from moisture and increase its bearing capacity. And treating the surface of the above-ground outer part of the pile with a two-component primer and an anti-corrosion compound will extend the life of the product in any case, no matter what kind of fence you make.

Sometimes the option "twisted the pile - inserted a pillar into it" is possible. This option also has the right to life, it has proven itself very well.

After all the piles are screwed in, the beams, on which the fence elements are attached, are mounted to the posts using self-tapping screws or metal dowels. When arranging a chain-link fence, you can attach the mesh using ordinary soft wire or metal clamps. To prevent the mesh from sagging, a tightly stretched wire or rod must be pulled through one of the upper rows of cells.

That's all. A fence on screw piles will serve as a reliable protection of the site, which is in no way inferior in strength to other types of fences.

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The reliability of the fencing being erected depends on the quality of the materials purchased. Therefore, when selecting supports, it is necessary to take into account the effect of wind force, the mass of the profiled sheets themselves. Particular attention should be paid to the specified parameters of the products, the thickness of the metal. To work, the performer will need:

  • combined intake screw piles (have a smaller blade size) with a wall thickness of about 3.5 mm
  • guides for corrugated board with parameters 4 × 2 cm
  • large piles with dimensions 10 × 10 cm for installing gates
  • corrugated board with a metal thickness of 0.5 mm.

Having purchased the required amount of materials, you can get ready for work. It is not difficult to do a complete assembly of the fence on screw piles with your own hands, but the contractor will need help: it is impossible to mount screw piles alone. One builder must hold and "adjust" the support, and the other two must screw it into the ground.


Foundation for a fence on screw piles: installation features

A little more detail about the differences in the installation of the mesh-netting and sectional structures (corrugated board, etc.).

To make a foundation for a fence with your own hands from a chain-link mesh, use small screw piles with a diameter of up to 50 mm and a length of up to 2.5 m, which are screwed into the ground by about a meter, and 1.5 m are left above the ground. The distance between the piles of the foundation for the fence is no more than 3 meters. The mesh is attached in different ways: using metal brackets, welding clamps made of solid wire or metal strip. A rod or tightly stretched wire is passed through the cells in the top row of the mesh so that the mesh does not sag. Usually, the whole process of installing foundation piles for the fence and fastening the mesh sheet takes from 1 to 3 days (depending on the length of the fence).

When installing screw piles for a fence made of corrugated board, a slightly different technology is used. Piles are taken with a larger diameter - from 70 mm and a length of 3 meters. Accordingly, the deepening of the screw piles into the ground under the fence will already be somewhat larger - 1.2 m.Further, crossbeams made of profiled pipes or made of wood are welded to the ground part, and sheets are already attached to them on self-tapping screws. The distance between the posts in this case should be less - up to 2.5 m. A wooden fence on screw piles, asbestos-cement or polycarbonate sections, euro lining, etc. is mounted in a similar way.

We have given the average data on the immersion depth when installing a fence on screw piles for the central regions of Russia, but we must not forget that a huge part of the country's territory is located in zones with a rather harsh climate. In this case, it is necessary to calculate so that the screw of the foundation pile under the fence is completely submerged below the level of soil freezing. Before starting construction, it is necessary to know the depth of the freezing horizon at the site of the future construction. It is undesirable to take generally known values ​​as a basis, since they can vary depending on the underground runoff and the nature of the soil. Before starting work on the installation of screw piles for the fence, you can contact the geological services and organizations at your place of residence for this information.

How to maintain the vertical when installing screw piles for the fence?

For the fence, you need to buy screw piles. Before starting the installation, the cord is pulled along the height of the future fence, then the piles are wrapped until the heads are aligned with the cord. You can buy screw piles for the fence with holes already applied for installing the canvas. It is very convenient to mount sectional fences with them.

When screwing screw piles under the fence, you need to strictly maintain the vertical and the position in the plan, otherwise after that you will have a lot of money and labor for turning, installing additional supports, concreting and leveling.

The easiest way to mount a fence on screw piles is to hire a mini-excavator or a car with a CMU - a crane-manipulator installation equipped with a special device - a pile wrapper. In such modern cranes-manipulators, automatic tracking of the depth and verticality of pile driving takes place.

If it is expensive to rent equipment for your project, the fence screw piles can be loaded by hand using two workers and any suitable metal rod: scrap or a piece of rebar. For this, holes are provided in the heads of the screw piles.

Advice: for the convenience of hand-tightening the piles when installing the foundation under the fence with your own hands, you can rent or make your own two-handed gate with a clip like a pipe wrench. In this case, it is much easier to control the vertical arrangement of the piles - it is enough to lower it into a plumb line. The machine for screwing piles under the foundation for the fence also works together, controlling the verticality along 2 plumb lines at 90 ° relative to the axis of the screw pile. Each employee controls his own plumb line.


Features of the installation of screw piles

For a fence on screw piles to be of high quality and durable, it is very important to pay attention to small details. They only seem unimportant, but in fact play a significant role.

Firstly, the site for placing the piles must be exactly mark out... Supports located at different distances will not make the fence stronger.

Secondly, the guides are necessary weld as carefully as possible. Place them at the top, middle and bottom. This placement will give the frame strength.

Thirdly, the distance between the guides should be approximately equal. The bottom should not be too close to the ground so that the corrugated board does not touch the ground. With close contact, it breaks down faster.

Another important part of creating a fence is the installation gate... When installing a fence made of corrugated board, sliding gates can become a convenient option. For their installation, the following processes are required. Short piles are screwed in next to the fence. Two of them are enough. Welded to them channel, and to it, in turn, videos. The door leaf will move along the rollers. Then a trapezoidal structure is installed. A professional sheet will be fixed on it and the door leaf will be obtained.

DIY fence on screw piles video

DIY fence on screw piles video


Fence erection

It will be quick and easy to make a wattle fence from willow twigs if the owner prepares a set of tools:

  • Secateurs
  • Nails
  • Wire
  • Rope
  • Pegs
  • The hammer is an ordinary and carpentry "mallet".

You will also need strong spruce branches that will serve as a support for the structure.

Let's take a closer look at the workflow. As usual, he begins by marking the line of the future hedge, for which the owner uses pegs and rope. Further, spruce branches are driven into the ground, sharpened on one side like a pencil. The recommended peg diameter is 3 - 5 cm.

To prevent the fence from skewing, it is reinforced with transverse strips. Place them horizontally at intervals of 30 cm or more from each other. As work progresses, the planks are removed if the hedge is not too long. Otherwise, the diameters are left. To make the supports easier to enter the ground, they are sharpened in the form of a wedge. Stakes are introduced to a depth of 35 - 50 cm, focusing on the desired height of the canvas.

In the process of weaving, you should not restrain the bending of the vine. It should be loosely intertwined with other elements, but not springy. To avoid this side effect, experts recommend maintaining a distance between the supports of 30 - 50 cm, deviations are not allowed. The step width depends on the thickness of the branches used.

How to weave willow fence fabric? The first rod is nailed by the tip to the base and brought out through the second stake. Then the vine goes around the 3rd stake in front and goes behind the 4th stick. The action is repeated until the branch ends. To make the weaving look neat, you need to connect the twigs imperceptibly.

The joints are masked in two ways:

  1. In the area of ​​the cuts, the vine is combined with wire or tape.
  2. Thin flexible branches intertwine and pull the tails inside out. Then the ends are cut exactly.

Subsequent levels are created in mirror image. In other words, the owner bends around the pegs that are skipped in the bottom row. In general, the work is simple, it will quickly be mastered by the person who knows how to make baskets. In the course of weaving, the vine is periodically compacted with a mallet so that the material lies tighter and smoother.

A more original weaving is obtained by passing 2 - 3 twigs at the same time. But they should not be intertwined. This technique requires a parallel arrangement of lozines throughout the weave.

In order for the fence made of willow branches to stand as long as possible, the wood is treated with a special antiseptic. The substance will protect the structure from rotting and damage by insects. Willow is naturally protected by tannins that save it from pests. However, in conditions of high humidity, the tyn can become moldy, so it should be covered with an antiseptic varnish.

If you want to change the natural color of the vine, it is painted with colored varnishes, wood stain or acrylic facade paint. The wattle is bleached with hydrogen peroxide.

Decorate the structure in different ways:

  • Garden sculptures are placed nearby.
  • Pots and pots are hung on stakes.
  • Climbing plants are allowed on the fence.
  • Sunflowers are planted along the fence.

As you can see, making a willow fence with your own hands is not difficult. The design is attractive for its natural simplicity and grace. With a sparse performance, it turns out to be openwork. The process of creating a hedge from willow twigs will seem pleasant to any creative person.


Watch the video: Krinner Ground Screws - THE foundation system for solar projects


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