Groove pits - we are for safe production

Ditch fencing with sheet piles

The sheet piling is a temporary fence that consists of wooden or steel sheet piles driven into the ground (around the perimeter of the pit).

They are used for any type of structures with foundation devices in cases where it is impossible to develop the pits themselves in the slopes. Fencing pits helps protect structures (and people's lives) from soil collapse.

Note! In order to save money, many construction organizations make sheet piling of pipes.

Pipe fence

As for the sheet pile profile, it is made of special carbon steel grades St3ps and St3sp according to GOST 380. When buying, pay attention to the profile surface - there should be no sunsets, rolled captives and rolled bubbles in the places of the face and locking parts.

Sheet pile profiles

The technology of installation of such fencing implies the immersion of its elements in pre-drilled wells and pre-filled with cement-sand mortar. It turns out that the solution is poured into the drilled wells, up to a certain mark (under pressure) and only after that pipes or beams are mounted in the hole.

This technology allows you to protect structures erected from the fall of the soil, as well as significantly increase the load carrying capacity of the tongue.

Dowel installation options

In addition to the standard method of pouring pipes or beams, there are several types of installation, which are adapted to different conditions and types of soil:

• Вибропогружение - when using this method, preliminary drilling of wells for dowels is carried out, and then installation of piles with the help of vibratory pile drivers. On soft ground it is better to use augers. According to estimates, the price for this method of installation of fences is the lowest, due to the efficiency of technology and minimal use of technical means;

Вибропогружатель

• torsion - this method involves the immersion of the tongue into the ground (special tips are installed on piles) by pressing and rotating. This method is in demand in the presence of ready-made, located near buildings. In this way, the excavation of the soil from the foundation can be prevented;

torsion шпунта

• Impact method - carried out by driving piles into the ground with a copra. When using this method, there are a number of limitations in densely built urban areas.

In the process of development, the walls of the pit, as a rule, are strengthened with a bore made of a cut board or metal sheet. In order not to waste material, after arranging the enclosing structure, the wedge can be used as a formwork element for concreting underground structures and structures.

The tongue-and-groove groove of the excavation pit with a zabirkoy is not waterproof, therefore, with the location of groundwater above the level of the bottom of the pit, care should be taken of the water system.

Having provided such a fence, you will be able to organize a safe site on the construction site, thereby significantly speeding up the process of erecting a building or structure.

Also, I would like to note the fact that the use of sheet piles is not limited to strengthening the foundation pits alone.

They are widely used to strengthen coastlines and trenches, are often used in the construction of overpasses, bridges and overpasses, are used to build hydropower plants and structures of similar directions (locks, hydroelectric complexes, moorings, bolveverki).

In addition, the dowels are used in the construction of warehouses for the storage of liquid and solid waste industry.

Shoreline sheet piling

In general, sheet piling fences look like a solid wall formed from steel piles (“Larsen” sheet piles, I-beams, Z-profile, pipe and flat sheet piling) by immersing them in the ground using one of the methods above.

At its core, this enclosure is waterproof and serves as a waterproof partition. But still the main function of the fence - to prevent the collapse of the soil.

The photo shows that this kind of fencing is a solid wall

Installation of various types of sheet piling

As mentioned earlier, sheet piling is metal piles installed according to the project along the edge of the excavation (for their construction, used, usually used material is usually used). The most commonly used pipe diameters are 219, 273, 325, 377, 426, 530 and 630 mm.

Metal pile ShK-150

Pipes "Larsen"

Fence pits for SNiP is one of the three above methods: twisting, driving in or vibrating piles (see also the article Screw piles for the fence - a simple and reliable foundation). In any of the above cases, it is required to pre-drill lettered wells.

If we talk about prices, in the territory of Moscow and the region the most affordable and cheap option is cone and auger drilling with further strengthening of the borehole walls with high-pressure mud.

Note! Using these methods, you can order wells up to 25 m deep! Clay, which precipitates, greatly strengthens the walls and ensures the density of the pipe landing.

A little explanation:

1. Price fluctuations depend solely on the depth of drilling, the categorical nature of the soil and the conditions of work;
2. When ordering installation work on the installation of sheet piling, pay attention to the fact that the price is indicated only for work, excluding the cost of the pipes themselves. First of all, this is due to the fact that the contractor does not know which pipes you would like to install as a dowel, and what is their wall thickness.

Bored piles

Installation of bored piles

Bored piles представляют собой пробуренные скважины, в которые опускаются различные виды металлокаркасов. После установки их заливают: ЦПС (цементно-песчаная смесь), бетоном или цементно-водной основой под высоким давлением.

Tip! Bored piles can dock with each other with the help of brown tangent and brown intersecting piles, which together with simple piles form a monolithic heavy-duty construction.

As for the pricing policy for bored piles, then there is no definite answer. The contractor will be able to voice you the price only after a personal presence at the facility, after assessing the complexity of the work and the type of soil.

Note! In addition to the injection of concrete, DSP and cement-water base, bored piles can be injected with special injections, with which you can significantly strengthen and strengthen the structure.

Sheet piles in inclined drilling

Types of drilling

If you decide to build a house on a hill (hill, mountain, slope), then you can not do without this construction operation. This type of work is performed using a special drilling rig capable of drilling wells at an angle. The calculation of the sheet piling is made on-site by specialists (it is not recommended to do it yourself, as a small mistake can lead to fatal consequences).

Sheet Piling

Installation of fencing

So, above we looked at how to install the grooves, their types and some features when working with them. But what are they? How do they look?

If you look into the good old Soviet encyclopedia, in the section "device of sheet piling fencing", you will get two meanings of the word tongue:

1. Sheet piling - sheet pile, which received in the construction practice a shorter and concise name. It is used in the construction of pits, trenches and hydraulic structures;
2. The tongue is a longitudinal protrusion that fits into a groove corresponding to its shape. It is used to connect elements of wooden structures (boards, boards, boards, etc.).

Knowledge of the device and an example of calculating a sheet piling are perhaps the most important elements in this case. In general, sheet piling are temporary structures that are formed from driven piles (into pre-drilled wells).

Calculation of sheet piling

Spin program, with which you can easily calculate sheet piling

So, the calculation consists in determining the required section of the tongue, in the depth of the tongue driving below the base of the excavation, as well as in the selection of spacers.

If you want to calculate the stability and strength of the fence, you must first remove all the water from the bottom of the pit during the installation of spacer mounts and the development of the pit.

Ordinary plastic nets for fencing sports grounds can be used as a temporary fencing of a construction object (See also the Plastic Mesh for Fence article - an alternative to familiar materials).

There is a special instruction for builders, which will help you calculate the sheet piling for various types of soil (even in swampy or flooded areas).

Note! If you install a sheet piling in sand or sand, then besides the basic calculations, you need to check the depth of the dowel itself below the bottom of the pit or the erosion mark in terms of the flow of soil into the pit when it rains or pumps water.

Conclusion

Despite the seeming simplicity of this process, the installation of grooves and the arrangement of the pit is a rather complicated matter, so it is better to entrust the work to professionals. If your pit is dug up in the rocks, then you can limit yourself to the usual fencing (Learn also how to make a foundation for the fence).

Renting a construction site fence will help you save a lot and at the same time fulfill all safety engineering requirements. In the presented video in this article you will find additional information on this topic. Successes!