Larsen sheet pile L4 is one of the options for metal profiles that have a specific geometry that allows you to effectively and quickly connect vertical or horizontal components into a closed system. They are in demand if it is necessary to create a limiting structure, which helps to keep the pit from flooding during excavation, or to exclude the displacement of the coastline due to washing away by melt or rain water, as well as the flow of natural water arteries. Let's get acquainted with such an indispensable material as sheet pile L4 in more detail.

Mounting techniques

Initially, the equipment for installation in the required position of the profiles must be powerful enough, and as a result, heavy, it is mounted on the KRAZ or Ural chassis. This ensures efficiency and ease of access to any remote site for laying the Larsen sheet piling. There are several methods of using this range of rolled metal products, the difference between which is that they are specially used when laying under certain conditions. Here are the main ones:

• Thus, the Larsen sheet pile L4 GOST 4781-85 is fixed by screwing, which is reasonable when implementing projects within the city in the immediate vicinity of the foundations of surrounding buildings. Due to this technology, excavation is excluded from the foundation support zone, which could lead to serious damage due to the redistribution of loads;
• The second technique is scoring. Previously, to simplify the process, a well is drilled at the place of laying the sheet pile L4. Experts appreciate the ability to implement the process in a short time, including urgent orders, as well as the safety for surrounding buildings in terms of possible ground movements. However, within the city limits, the use of the technology is limited due to the increased background noise that will accompany the laying of the L4 sheet piling, and the resulting vibrations can be regarded as a negative factor when working near dilapidated buildings;
• another technology involves loosening the soil at the place where the parts are immersed. The technique is called flushing and is implemented by flushing with water jets under pressure. In this case, the resistance of the soil during immersion decreases, this allows you to buy a Larsen L4 sheet pile of any required length without fear of a lack of power in the driving process;
• one effective option involves indentation when transmitting vibrations to components. In this case, you can buy Larsen L4 sheet pile of any length. The technology allows minimizing background noise during the implementation of the process, therefore it is recommended for carrying out activities within the city, up to the proximity of a residential area. The technique is relevant on moisture-saturated soils and soft substrates, but if conventional indentation is not enough, then they work with a vibratory hammer that combines two types of impact;
• often the working conditions allow using the usual indentation of the L4 sheet pile, which is distinguished by sufficient efficiency at minimal cost.

Sheet pile L4 has standardized parameters, the cross-sectional area of ​​​​which is 94 square centimeters. The running meter of a structural element is 72 kilograms, and the minimum length of sold parts starts from five meters, the standardized maximum is 22, but in agreement with the manufacturer, custom-made and large lengths are allowed. A spread of 5-22 m is a measured delivery option, when it is divided into equal parts, multiple parts are obtained. If necessary, you can find non-dimensional components that have a greater spread in length, the minimum tolerance for which is usually underestimated. An advantageous characteristic in relation to such profiles is the fact that the prices of Larsen L4 sheet piling are somewhat more profitable.

Most often, experts implement the laying of the products in question due to steam-air diesel and vibration equipment. For the purpose of reuse, repeated dismantling of components is allowed if their characteristics are not violated by deformations and fracture centers. If necessary, the components are corrected and repaired, which somewhat prolongs their life and allows to achieve longer service life.

Of the characteristics of the sheet pile L4 GOST, the following parameters are valued:

• resistance to corrosion in potentially hazardous conditions such as high humidity, up to installation in environments with a high content of active substances. An example is sea coasts, where the air and water are saturated with salt, which quickly renders unprotected steel unusable;
• strength and high bearing performance. These values ​​are achieved by giving the profile a special geometry, which increases rigidity, as well as by increasing the thickness of the base metal;
• manufacturers of Larsen L4 sheet piling declare that the material can be stored in various conditions. It is important to exclude the ingress of potentially hazardous substances to the surface, otherwise the restrictions are minimal, even temporary storage in the open air is considered the norm;
• highlight the reliability of the final design, that is, the parts connected in a closed system become an insurmountable barrier to water and soil, which can crumble during operation.

The exact parameters of the material grade in question are as follows:

• component width 436 mm;
• wall width 292 mm;
• part height 204.2 mm;
• wall thickness 14.8 mm;
• shelf thickness 9.5 mm;
• a ton of material includes 13.5 meters.

The prices of Larsen L4 sheet piling are at the average level, which is due to the given parameters.

Manufacturers of Larsen L4 sheet piling use St3kp and 16GH grades as raw materials, that is, carbon structural and special alloyed. Release is carried out by cold forging or hot method, which allows you to give the components the required parameters.

In order to buy high quality L4 sheet pile, which will be able to fully realize the capabilities of this specific material, we recommend using the services of trusted companies and suppliers, which are presented on the portal "

In the process of digging the pit and carrying out the planned work, there is a risk of collapse of the walls of the structure. This danger is especially high when it comes to mobile or soft soils with a high level of groundwater. To strengthen the walls of the pit in modern construction, the Larsen sheet pile is used. In addition, it is used to strengthen the coastline, the construction of piers and moorings, the construction of dams, piers, collectors, etc.

Types of sheet piles

There are many different ones that differ from each other in terms of parameters and technical characteristics: shape, size, weight, metal consumption. All of the above affects the resistance of the sheet pile. All of the above affects the load resistance of the sheet pile. It is this characteristic that is the main one. However, the classification of sheet piling according to various parameters still exists.

Sheet pile classification

According to the material of manufacture, the sheet pile can be metal (the most common option), reinforced concrete, plastic, wood, composite. Steel sheet piles are the most widely used, as they have a high resistance to stress.

Metal sheet piles are divided into four groups according to the manufacturing method:

• Hot rolled. In this case, the tongue takes shape during the manufacture of a workpiece made of molten metal, that is, the cast strip is immediately rolled to the required dimensions;
• Cold-formed. The cold billet is rolled through the machine;
• Welded. In this case, the sheet pile is obtained by welding various parts;
• Rolled and welded. Some of the elements are made by rolling, and some by welding.

Many manufacturers today offer a corrosion-resistant coating. Such products are more expensive, since copper or zinc is included in the steel.

According to the shape of the section, the sheet pile is divided into:

• Made in the shape of the letter Z;
• trough-shaped;
• I-beam;
• Flat;
• Tubular;
• Combined, that is, combining trough-shaped and I-beam elements.

Sheet pile Larsen L4

It is a trough-shaped product connected by tongue-and-groove type locks.

Specifications and dimensional indicators:

• mounting width - 40 cm;
• length - from 5 to 22 m;
• profile height 204.5 mm;
• wall thickness in the middle part 14.5 mm, in the sidewalls 9.5 mm;
• sheet pile weight per square meter - 185 kg;
• The weight of one meter is 74 kg;
• The strength of the product is -518 kN per meter of length.

Sheet pile Larsen L5

An analogue of L4, which has slightly different parameters:

• Mounting width - 42 cm;
• length - 24 m;
• thickness of the main wall - 21 mm, side - 11 mm;
• profile height 196 mm;
• weight of one linear meter - 100 kg;
• weight of one square meter - 238 kg;
• product strength - 698 kN / m.

Sheet pile Larsen L5D

It differs from the previous brand only in the following parameters:

• Profile height - 240 mm.
• Mounting width - 51 cm.
• The weight of one meter is 105 kg.

Sheet pile Larsen L5-UM

• working width - 54.3 cm;
• the length of the product varies in the range of 5-24 m;
• profile height - 236.5 mm;
• width of the main shelf - 344 mm;
• thickness of the main wall - 23 mm, sidewall - 11 mm;
• The weight of one meter is 113 kg, one square meter is 227 kg;
• Bearing capacity - 906 kN / m.

Sheet piles ARCELOR

Produced by the international company ArcelorMittal, registered in Luxembourg. Its factories are located all over the world, including in Russia (one of the company's factories is located in the Tula region).

This company produces sheet piles of three models, which differ in shape:

• AZ. Has a Z-shaped profile. Due to the large width, the number of connections is reduced. This improves the bearing capacity. Z-shaped elements are connected to each other so that a trough-shaped form is obtained. This allows you to achieve the ideal ratio of the mass of the sheet pile and its moment of resistance;
• AS. A flat version of the Larsen sheet pile. It is used for fencing cylindrical structures and in cases where it is impossible to use anchoring;
• U-sheets are standard trough-shaped sheet piles. In this category, there are three models that differ in strength characteristics. AU - wide profile with low weight and high load-bearing capacity. PU - a profile with reinforced shoulders. GU is a lightweight version.

Sheet pile HSP

Produced in Germany. It has a high bearing capacity and strength characteristics. Increased tightness of the steel wall is provided by an improved design of the interlock. This type of Larsen sheet pile is used for sewer tunnels, waste disposal for chemicals and radioactive elements. This category includes more than 40 sheet pile models, which differ in strength characteristics.

So that storm and ground waters do not flood the construction pit, and its edges do not collapse down, they are reinforced with special metal plates that have a special shape, which makes it possible to obtain a prefabricated waterproof fence. By the name of their inventor, they are called Larsen sheet piles, and are widely used not only in the construction of buildings.

Our company carries out both the driving of reinforced concrete piles and the immersion of various types of sheet piles, including the Larsen sheet pile. For this, wheeled piling rigs based on KRAz and Ural vehicles are used. They allow you to quickly arrive at the place of work and carry out them even in dense buildings with limited maneuver.

Rice. 1: Exploded view of Larsen sheet piles

Methods for immersing the Larsen sheet pile

Larsen sheet piling can be installed using a variety of methods, which will differ from the surrounding conditions.

• screwing. It is used if there are any structures nearby. This method prevents the possibility of excavation of the soil from the fundamental support.
• driving. Preliminary leader drilling of a well. High performance and the ability to use in densely built-up areas.
• Washing. Using this method, the soil is partially loosened and washed out with water jets, which helps to reduce the resistance coefficient for the sheet pile tip.
• Vibration pressing. The use of vibro-immersion technology ensures low noise background and clarity in compliance with the required parameters. It is used on soft and water-saturated soils. In some cases, a vibratory hammer is used.
• indentation. When using Larsen sheet piles, indentation technology is usually resorted to, since it has its own advantages in relation to others.

Areas of application for Larsen sheet pile

Larsen sheet piling fences are widely used in construction and are used to solve the following problems:

• protection against shedding and collapse of the walls of pits;
• prevention of flooding of construction sites (including during works at the bottom of reservoirs);
• construction of various hydraulic structures (dams, bridges, locks, canals, moorings, etc.);
• strengthening coastlines and embankments;
• strengthening of landslide areas;
• fencing of city dumps;
• construction of various treatment facilities, etc.

Larsen sheet pile device

This type of driven tongue is a metal profile, the edges of which are rounded and can be joined together into a lock. The simple design of the Larsen sheet piling makes it quick and easy to protect deepened construction sites around the perimeter.

Modern manufacturers offer a choice of several types of Larsen sheet pile:

• L - profile,

• S - profile,

• Z - profile,

• and the most common type of sheet pile is a trough-shaped profile.

Profile sizes are also different, with the longest sheet piles reaching up to 34 meters and the widest profiles reaching 80 cm.

Larsen sheet pile mounting scheme

The installation of profiles and the installation of a steel continuous sheet pile along the perimeter of the construction site is carried out in small (2-3 profiles each) sections, which are immersed in the ground by a pile-driving installation by driving. Neighboring tongues, at the same time, are in a mirror position (turned 180 degrees), which ensures their interlocking.

Rice. 2: Submerged sheet pile Larsen

To ensure the tightness of the joints, they are treated with silicone sealant. With a significant size of the pit, the sheet piles are additionally reinforced with beams and spacers, which increase the rigidity of the structure.

Sheet pile Larsen L5 technical characteristics

Larsen sheet pile L5 is a building element responsible for high quality, since its production is based on the norms TU-14-2-879-89.

Rice. 3

For the manufacture of L5 sheet pile, carbon steels are used:

• St3kp - boiling steel, manufactured in accordance with GOST 380-94, where 3 is the conditional percentage of carbon.
• St3sp - semi-quiet steel, manufactured in accordance with GOST 380-94, where 3 is the conditional percentage of carbon.
• 16KhG - structural alloy steel, manufactured in accordance with GOST 4543-71. Responsible for strength indicators.

Sample steels St3kp and St3sp are produced by hot pressed rolling, while alloyed metal 16KhG is created using cold stamping.

Description of sheet pile Larsen L5:

• The profile has a cross-sectional area of ​​one hundred and twenty-seven square centimeters.
• Its length can be from five to twenty-two meters.
• The wall thickness is twenty-one centimeters.

Why use Larsen L5 sheet pile

• Multiple use. High anti-corrosion properties make it possible to use sheet piles L5 up to six times. To do this, after completion of construction work, the entire sheet pile structure is removed for further use.
• Convenient transportation. Transportation of metal profiles is possible on any transport, be it a car or a train. During movement, the tongues are fixed with special linings that provide good fixation.
• Storage. Possibility of storage in any premises, even outdoors.
• A lot of possibilities. Larsen sheet pile type L5 allows you to fix surfaces of various shapes, including winding or rounded ones.
• Big choice. The ability to use a certain type of profile for a specific type of construction work.

Sheet pile Larsen L4 technical characteristics

The Larsen L4 sheet piling has the appearance of a trough rolling structure. Produced from St3kp and St3sp steel using hot rolling technology. Metal grade 16XG is used less frequently.

Rice. 4

Description of sheet pile Larsen L4:

• The cross-sectional area of ​​​​the profile is ninety-four square centimeters.
• The mass of one linear meter is seventy-two kilograms.
• The length of the metal plate starts from five to twenty-two meters. The measured length of the profile varies from ten to twenty-two meters.

Installation of L4 sheet pile profiles is carried out using steam-air diesel hammers or vibration technology. Also, after the completion of construction work, the sheet pile can be removed from the ground and reused.

Prompts for using the Larsen L4 sheet pile:

• Anticorrosion. Resistance to the appearance of corrosive formations increases the service life.
• Strength. Resistance to mechanical damage.
• Storage. Storage of profiles can be carried out in any room and outdoors.
• Reliability. High stability and strength of metal bases ensure the stability of the constructed structure.

Larsen sheet pile size according to GOST

To visually compare and find out the dimensions of Larsen sheet piles according to GOST, just look at the table below.

Type	Profile width, mm	Wall width, mm	Profile height, mm	Wall thickness, mm	Shelf thickness, mm	Weight 1 meter, kg	Number of meters per ton
L4	436	292	204,2	14,8	9,5	74,0	13,5
L5	466	332	196	21,0	11,0	100,0	10,0

Rice. 5

The static indentation method, used to drive sheet piles into the ground, is considered "forgiving", as it is almost silent.

Fig 6

Stages of the process of pressing the tongue:

• Installation. The location of special equipment at the control points for installing Larsen sheet piles, provided for by the project.
. Loading with anchor weights of hydraulic installations.
• Sheet pile installation. The location of the sheet pile in the clamps of the guide trap.
• Immersion process. The immediate moment of pressing the sheet pile into the ground and its centering.
• permutation. Unloading the pressing unit and its relocation to the next control point.
• Measurement. Checking the required depth of the sheet pile, its design deviations and other nuances. With a significant difference between the values ​​in the project and the real ones, the sheet pile is reinstalled.

Video, showing the process of indentation of a sheet pile with leader drilling:

Technology Benefits

Advantages of Larsen's sheet pile technology

• Possibility of application near standing structures;
• Less power consumption ratio;
• Small vibration and the practical absence of background noise;
• High installation speed.
• The need for use on soils with high water saturation and weak sandy soils.
• The absence of mechanical damage on the sheet pile, while using the percussion method increases the likelihood of breaking the integrity of the sheet pile.
• Mobility and compactness of the equipment used.
• Profitability.

Larsen sheet pile price per meter

The initial cost of one linear meter of sheet pile with a diameter of 400 mm starts from three hundred and fifty rubles. Ideally, you can calculate the price in AutoCad using the value table above.

Our Larsen sheet piling services

Our company performs work on Larsen sheet piling by driving on any objects and for various purposes. Most often, this is the fencing of pits during construction work, the installation of artificial reservoirs, the strengthening of embankments along roads under construction and access roads to construction sites, and in a number of other cases.

In addition, we carry out driving of reinforced concrete sheet piles and sheet piles from metal pipes, and any rolled metal. Such a solution is quite acceptable in the absence of a threat of flooding the pit. The gaps between the sheet piles are sewn up with boards and ensure the safety of the work.

Pipe indentation order

1. The construction company Bogatyr will accept an order for pressing pipes in the city of Moscow. The implementation of work by our company in Moscow and the region is a great responsibility and careful control over the quality of the work performed.

2. Narrow-profile specialists-engineers will quickly and efficiently carry out all calculations. And specially trained workers under the guidance of foremen will accurately perform all the necessary work within the specified time. For a specific construction site, individual solutions are possible, based on local conditions.

3. Our experts will advise you on any issues and offer the most appropriate options for the work. If necessary, you can get detailed advice by calling the specified phone number.

Definition of the term "Larsen sheet pile"

Larsen sheet piling - long (up to 34 m), but narrow (436-549 mm) metal profiles with locks (tongues), allowing you to connect one profile to another vertically to create a sealed metal wall in the ground.
Separate sheet piles, when driving with diesel hammers or vibratory pile drivers, are turned over by 180 ° relative to each other (when viewed in profile) and connected by inserting one sheet into the side groove (lock) of the adjacent one. The fully assembled structure is a ring or a long steel fence (sheet piling)
To reduce filtration, a sealant is introduced into the interlock space. In addition, there may be a combined use of sheet piles with metal beams, pipes.
Larsen sheet piling is used for: excavation, strengthening of coastlines, construction of bridge supports, etc. Works requiring the use of Larsen sheet piles or sheet piles are the most expensive work to strengthen the soil in open-pit mining, precisely because of the need to use large masses of sheet piling.
Here are the technical specifications and drawings of the classic (and most popular in the Russian Federation) Larsen sheet piles:
- , produced by EVRAZ, NTMK (Nizhny Tagil, Russia)
- Larsen sheet pile L4 and L5, manufactured by the Russian Mining and Metallurgical Company, DMK (Ukraine).

Geometrical dimensions of Larsen sheet pile L5-UM	Tongue lock L5-UM
Geometrical dimensions of the Larsen sheet pile L4	Tongue lock L4
Geometrical dimensions of Larsen L5 sheet pile	Tongue lock L5

Technical characteristics of the Larsen sheet pile.

The group of companies PA "Beregstal" performs all types of operations with Larsen sheet pile of Russian manufacturers and their foreign counterparts:

Supply of new and used sheet piles

Sheet pile rental, incl. new

Sheet piling - driving and excavation

This is one of the varieties of rolled metal, developed in its form at the beginning of the 20th century. The product has a wide application from construction to hydraulic engineering. The special shape of the profile makes sheet piling the best solution for many construction tasks.

Larsen sheet pile device

Sheet pile is a hot rolled product made from steel with a high carbon content. The shape of the profile in cross section resembles a trough with edges equipped with locks - they allow you to fix the products together when installing vertical enclosing structures, for example, supporting walls.

The production control of Larsen sheet pile is regulated by GOST 4781-85 “Hot-rolled steel profiles for sheet piles. Specifications". There is no separate standard for the product, so manufacturers are guided by the developed specifications.

The document presents the standard dimensions of a sheet piling beam, the grade of steel used for the production of steel, the procedure for checking the quality and acceptance of products, and other important parameters.

Varieties

The product is used in different areas of construction, so the technical characteristics, the appearance of the profile and the grade of steel used are different for different types.

Sheet pile Larsen L4

The profile is made of steel 16HG (ST3KP). Its characteristics:

• useful width of the product in the center of the lock - 405 mm,
• wall strength is 517-518 kN/m;
• thickness of inclined faces - 9.5 mm;
• allowable resistance 1 p.m. supporting wall - 2200 cm³/m;
• weight of Larsen L4 sheet pile - 74 kg/m;
• weight of 1 m² of construction - 182.7 kg.

Larsen sheet pile l4 is produced at 2 factories:

1. Russian Mining and Metallurgical Company;
2. "DMK" (Ukraine).

The product is widely distributed in Russia and the CIS countries, it can be bought from various suppliers in the primary and secondary markets.

Sheet pile Larsen L5

For the manufacture of this rolled steel, ST3KP steel is used. This is a more powerful profile than L4:

• useful profile width between locks - 420 mm;
• wall strength - 696…800 kN/m;
• allowable resistance 1 p.m. supporting wall - 2962 cm³/m;
• weight of Larsen L5 sheet pile - 100 kg/m;
• weight of 1 m² of construction - 238 kg.

Like L4, L5 sheet pile is produced by the Ukrainian DMK and the Russian Mining and Metallurgical Company. You can buy the product throughout Russia at affordable prices from various suppliers and intermediaries. On sale you can find rolled VL607 - this is an analogue of L5 sheet pile from the Czech company Evraz.

Sheet pile Larsen L5-UM

This representative of rolled products of this type differs from its predecessor in the quality of the steel used for the production - it is resistant to corrosion, it contains copper.

• Useful profile width between locks - 543 mm;
• wall strength - 906 kN/m;
• thickness of the inclined edge - 11 mm;
• allowable resistance 1 p.m. supporting wall - 3555 cm³/m;
• weight of Larsen L5-UM sheet pile - 114 kg/m.

Other types

Larsen sheet piles differ not only in technical characteristics, but also in the shape of the lock:

• S-profile;
• L-profile;
• Z-profile.

In all cases, the lock forms a tight connection between adjacent profiles.

For different purposes, beams made of non-metallic materials are used:

• plastic;
• reinforced concrete;
• tree.

However, steel sheet piles are the most commonly used and are in demand.

Application area

Larsen sheet piling is used in civil engineering and in the arrangement of hydraulic structures for various purposes:

• strengthening of foundation pits for the period of installation work;
• protection of pits from filling with groundwater - the connection of the sheet pile is completely hermetic and retains its properties for several decades;
• strengthening the walls of tunnels, highways and local roads;
• fixing coastlines and protecting them from erosion;
• arrangement of dams, dams, locks, moorings, etc. and their repair;
• construction of treatment facilities;
• strengthening soils prone to slipping.

The tongues, connected by locks, form a sealed and durable wall that can take significant loads. Products are immersed in the ground, leaving a fence of the required height above ground level. The arrangement of sheet pile walls is much more profitable than the installation of concrete and reinforced concrete structures, therefore, metal profiles are most often preferred in cases where it is necessary to contain the pressure of water and soil.

Installation

The method of immersing the Larsen sheet pile depends on the length of the product and the characteristics of the soil. There are 3 methods of mounting profile piles:

• clogging;
• vibration immersion;
• indentation.

The sheet pile is inserted into the ground according to the design position, the next one is buried upside down by 180 ° relative to the previous one to enable the mounting lock to be closed, and so on.

hammering

This method is used outside urban areas, since the vibration transmitted to the ground has a destructive effect on the foundations of adjacent buildings and structures.

Clogging is carried out by means of special equipment - copra. This machine is equipped with an impact mechanism, the impact force of which on the pile being driven is regulated depending on a number of factors (sheet pile, soil parameters).

Larsen sheet piling is the fastest and cheapest method of deepening steel retaining walls.

vibration immersion

The second most popular method is vibration immersion. This method is used in cases where it is not possible or necessary to clog the elements of the supporting wall (in reservoirs, on coastlines, on soft soils saturated with water).

Vibration is provided by a mechanism that emits low frequency vibrations. It is hung on excavators, cranes and other equipment.

How the dive works:

• the sheet pile is attached to the vibration mechanism by means of slings;
• direct the rack to the design position;
• the installation presses on the pile, emitting vibration, which helps the steel product sink into the ground.

The method does not have a significant effect on the soil, however, its use within the boundaries of dense buildings is limited. In addition, the method has a significant drawback - high cost compared to clogging.

indentation

The most expensive and the only sheet piling method approved for use in urban areas is indentation. The process is carried out by a special pile-pressing installation (SVU) on caterpillar tracks. The sheet pile is attached to the movable mechanism in a vertical position, the profile is immersed in the ground to a predetermined depth.

Dismantling

When the supporting wall becomes unusable or the need for it disappears, it is dismantled. The extraction of the Larsen sheet pile is carried out using a vibrating unit. The use of a crane alone is inefficient - the friction forces in the soil are significant, and only short-amplitude oscillations can weaken them.

The sheet piling is fixed in a vibration unit suspended from a crane and the vibration generator is turned on, the pulling force is gradually increased.

As a rule, the cost of even used sheet piles exceeds the cost of their dismantling, so the work pays off well. For this reason, organizations that are engaged in the extraction of sheet piles themselves pay their customers the difference in prices, the latter automatically solve the issue of selling unnecessary profiles.