DE102022000796A1 - Earthwork element and earthwork installation consisting of at least two connected earthwork elements - Google Patents

Abstract

The invention relates to an earth building element (1) with at least a first layer (2) made of at least one material (4, 5, 6), which is selected from the group of a biodegradable material (4) and an inorganic material (5) and a material (6) is plant-based, and/or with a second layer (3), which consists of at least one material (7) that is resistant to environmental influences. The invention also relates to an earthworks installation (22), in which at least two earthworks elements (1) are connected to one another in a form-fitting and/or cohesive manner, the earthworks installation (22) in particular being a sheet pile wall (23) and/or a pipe installation (24) and/or or a cable installation (25) and/or a surface installation (26) is carried out.

Description

The invention relates to an earthwork element and an earthworks installation, in particular for a sheet pile wall and/or pipe installation and/or cable installation and/or surface installation.

From the publication CH 550 290 A A sheet pile wall is known as an earthwork installation with several piles as earthwork elements, the piles being made of plastic, in particular being cast from a plastic reinforced with glass fibers.

From the publication DE 10 2015 105 133 B4 Sheet piles made of metal or plastic are known.

Also the printed matter EP 2 930 274 B1 describes sheet piles made of metal or plastic. Plastic sheet piles are described as particularly durable. Plastic sheet piles can be manufactured by extrusion. In the contact area for connecting to another sheet pile to produce a sheet pile wall, this publication teaches that the sheet pile is equipped with a sealing compound. The sealing compound is designed as a finished sealing tape or is bonded to the sheet pile by gluing or coextrusion. Bentonite can be used as a band-shaped sealant.

The publication DE 295 04 062 U1 describes sheet pile wall elements that are made of metal and coated with plastic or galvanized. However, this plastic layer or zinc layer can be easily damaged. It is therefore suggested that the coating be made of stainless steel.

The publication DE 10 201 7 007 834 A1 shows a water-impermeable surface component, which is made up of at least three layers, the middle layer consisting of shredded plastics and the outer layers each consisting of a homogeneous, preferably originally formed plastic layer, in particular plastic film.

From the publication DE 10 2020 005 082 B3 The use of metal or natural materials or mineral materials as a material in earthwork structures to avoid microplastics is known.

When earth building elements are inserted into a soil, the surface of an earth building element is exposed to strong mechanical stress. Parts of the surface structure are also mechanically and/or chemically detached from the earthwork element. When an earthwork element is subsequently removed at the end of the period of use, the earthwork element is again exposed to mechanical and/or chemical stresses, which again leads to material being removed from the surface of the earthwork element. During the period of use, the earthwork element is also exposed to mechanical and/or chemical influences and attacks. The parts that are mechanically and/or chemically detached from the earthwork element during installation, use and removal remain in the ground and mix with it. This leads to the disadvantage that when plastics are used in earth building elements, plastic residues remain in the soil and pollute it in the form of macroplastics and microplastics.

However, plastics have been established in many ways as materials for earth building elements and have clear advantages over conventional materials for such applications. In particular, the low mass of earthwork elements made of plastic ensures low cost and environmental impact when transporting the earthwork elements.

Against this background, the object of the invention is to provide an improved earthwork element and/or an improved earthwork installation consisting of at least two connected earthwork elements, in particular minimizing the entry of macro- and microplastics into the ground.

For this purpose, according to the invention, an earthwork element according to the features of claim 1 and an earthwork installation consisting of at least two connected earthwork elements according to the features of claim 12 are provided.

The earth building element according to the invention has at least one layer which consists of at least one biodegradable material or consists of at least one inorganic, preferably mineral material or contains at least one plant-based material. This alone can ensure that emissions of plastic into the ground are avoided, or at least massively reduced.

The term biodegradable means that the object or layer in question is compostable, i.e. in less than 12 months, preferably in less than 180 days, in particular in less than 28 days under the influence of moisture and/or oxygen and/or UV radiation and/or bacteria are broken down.

According to an alternative or additional aspect, the earth building element has at least one further layer, which is made of at least one material that is resistant to environmental influences, in particular made of a polymer. The use of polymers has proven to be technically advantageous. In order to avoid the emission of microplastics into the ground when using such earthwork elements, such earthwork elements are preferably constructed from several layers. The outer layer, i.e. the layer that comes into contact with the soil, preferably consists of at least one biodegradable material or of at least one inorganic, preferably mineral material, or this outer layer contains at least one plant-based material.

This makes it possible to provide earth building elements that are sustainable in their use and, in particular, do not pollute the soil with microplastics.

An earthwork element made of a single layer can be, for example, an empty pipe or a sheet pile, which are only intended for a limited period of use, but can remain permanently in the ground because of the material used according to the invention. Earth building elements made of an inorganic, especially mineral, material are free of polymeric plastics and are not foreign bodies that pollute the environment.

An inorganic material can be, for example, glass. This ensures that the earthwork element has a high mechanical and chemical resistance, without plastics, in particular microplastics, being released into the surrounding soil or surrounding water if this material layer is damaged on the surface. This reduces ecological contamination because, in contrast to plastics, mineral substances, for example in the form of abrasion as microplastics, are much less harmful.

Earth building elements made of a biodegradable material will decompose within a few months or years under the usual environmental influences such as moisture and/or air and/or temperature changes. They therefore do not pose a long-term threat to the soil or the rest of the environment.

The terms “first layer” and “one layer” are synonyms for the same feature. Likewise, within the framework of this property right, the terms “additional layer” and “second layer” are used synonymously.

The first layer is free of plastics, so that no microplastics are released during production in the logistics chain, during installation, during use or when dismantling. Organic material is preferably compostable, i.e. biodegradable; in particular, this material dissolves under the influence of moisture and/or temperature and/or air. This ensures that this layer or the abrasion of this layer remaining in the ground rots.

The organic material can, for example, consist of natural colors, biopolymers, paper, wood, foamed or extruded natural materials, such as cellulose.

The term “plastic-free” or “free of plastics” does not exclude the possibility that plastic contaminants are contained in small amounts of less than one percent by volume in the material, in the at least one layer of the material or in a coating made of the material. Since the material is removed or abraded from the earthwork element during introduction into the ground and/or during use in the ground and/or when removed from the ground and is introduced into the ground in this way, a plastic-free coating offers the The advantage is that no plastic, especially micro- or nanoplastics, is introduced into the earth when the plastic-free coating is removed or abrasion. This prevents contamination of the soil with plastic particles.

The inorganic, in particular mineral, material preferably consists of a stone, in particular basalt, preferably in extruded and/or foamed form. This means that a natural substance is used without microplastics being created or introduced into the soil. In addition, such materials are characterized by a high level of longevity and resilience, especially to tensile stresses.

If the material used is organic, it will preferably be designed as a compostable, i.e. biodegradable, material. This makes it possible for the material to dissolve under the influence of moisture and/or other environmental influences. This ensures that the material rots after installation, for example in the ground, and no longer needs to be removed from the ground, disposed of or recycled at the end of its service life. The organic material can, for example, consist of natural fibers and/or animal hair and/or cellulose and/or biopolymers.

The earthwork element made of organic material is preferably produced by continuous casting or extrusion.

Another aspect is that the first layer consists of at least one organic material. This is free of plastic, so that no microplastics are released from the weft threads during production, in the logistics chain, during installation and during use. The organic material is preferably compostable, i.e. biodegradable; in particular, it dissolves under the influence of moisture. This ensures that this part of the earthwork element rots after installation, for example in the ground, and no longer needs to be disposed of or recycled at the end of its service life. The organic material can, for example, consist of natural fibers and/or animal hair and/or biopolymers.

A further aspect is that the earth building element has at least one second layer, which is particularly durable, is particularly resistant to environmental influences and/or reduces or prevents the permeability to moisture.

One aspect of the invention is that the earth building element has at least one further layer, that is to say consists of at least two different layers. It is provided that the further layer consists of at least one material that is resistant to environmental influences. As a result, for example, one of the two layers can be designed to be permanent and durable, while the other of the two layers is designed to be biodegradable. The design of the earthwork element from two different layers also opens up the possibility of producing the layer with the durable material from a polymer, i.e. using a polymer as a durable material, and producing the other of the layers from a material free of plastic.

One aspect is that the layer with the durable material is surrounded by the layer with the plastic-free material at least on all surfaces that can come into contact with the ground. This ensures that an earth building element is created which, on the one hand, has a solid, durable layer that is impermeable to fluids and, on the other hand, does not release any plastic into the environment when it comes into contact with the ground.

Another aspect is that the first layer, made of the plastic-free material, and/or the second layer, made of the durable material, is produced by extrusion. These procedures have proven to be particularly advantageous. In particular, it is provided that the first layer and the second layer are produced together by coextrusion. This creates a one-piece earthwork element in which the layers are particularly well connected to one another.

According to one aspect, the earthwork element consists of at least one first layer. The earth building element is now either designed in such a way that the at least one layer consists of at least one material which is a biodegradable material and/or is an inorganic, preferably mineral material and/or contains plant-based material.

According to one aspect, the earthwork element is alternatively designed such that the earthwork element has at least one further, second layer, which consists of at least one material that is resistant to environmental influences, in particular a polymer.

According to one aspect, in a further alternative, the earthwork element is designed such that the at least one layer consists of at least one material and the further layer consists of at least one material that is resistant to environmental influences.

According to one aspect, in a further alternative, the earthwork element consists of at least a first layer and a further, second layer. The first layer consists of a material which has one or more components from the group of a biodegradable material and an inorganic material and a plant-based material. The further, second layer consists of a durable material.

However, an earth building element can also be produced in another way with the two layers. For example, it is possible to apply the first layer with the plastic-free material to the second layer. The material could be applied as a liquid coating by brushing, pouring, dipping, spraying or the like. The material can also be connected to the second layer as a solid component by laminating, veneering, pasting or similar. For example, the plastic-free layer could consist of a real wood veneer.

In the case of an earth building element made up of several layers, in particular of different materials, the first layer is applied to the second layer, for example. In particular by at least one of the process processes spraying, painting, laminating, sticking. This makes it possible to produce various earthwork elements, in particular according to customer requirements, with just one base body by applying different coatings.

One aspect is that the plant-based material has at least the first layer twenty percent by volume of one of the materials from the group of grain husks and/or wood chips and/or bamboo chips and/or flax fibers and/or vegetable starch and/or grass clippings and/or cellulose, in particular waste paper fibers. This creates an earth building element in which the abrasion, particularly during installation or removal of the earth building element, does not cause the soil to become contaminated with plastic. The abrasion from the materials mentioned will decompose in the soil and is not a contamination.

In the first layer, the inorganic material can consist of at least one metal and/or at least one mineral. This makes it possible to provide the first layer made of a material that is very robust against mechanical influences. This reduces abrasion. In addition, the use of inorganic materials means that the resulting abrasion does not put any strain on the floor, as these materials are free of plastic.

Another aspect is that the first layer consists exclusively of the at least one biodegradable material. Such a design is particularly advantageous for short-term use of the earthwork element. Not only because the abrasion caused by the installation and removal of the earthwork element does not remain permanently in the ground.

With a two-layer heritage building element, the coating from the second layer can be removed more easily and in a more environmentally friendly manner after use, so that the base body, i.e. the second layer, can then be equipped with a new, different layer for a new, different use.

In the case of a single-layer earth building element made of only the first layer of biodegradable material, the earth building element would decompose in the ground over the long term. This can be an advantage if the earthwork element is only needed for a short construction phase but must remain in the ground afterwards.

It has proven to be advantageous that the material that is resistant to environmental influences is a synthetic polymer. This makes it possible to provide a base body for an earthwork element that is not only durable, but also allows for free shaping and/or has a significantly lower mass than comparable constructions made of metal or concrete. The latter in particular reduces the energy required during transport and installation and is therefore ecologically and economically advantageous.

One aspect of the earthwork element is that the lifespan of the first layer is significantly shorter than the lifespan of the second layer. The service life is the period during which the earthwork element maintains the requirements for mechanical properties, particularly under the influence of the environmental influences that are common in earthworks. The term service life is to be understood as the period of use and determines the period of usability and/or functional stability of the earthwork element or the layers. The use of layers with different service lives makes it possible to provide an earth building element in which the layers take on different tasks. The short-lived layer can be damaged during installation, but it protects the long-lasting layer.

During their service life, the functionality or intended use of the respective layer or earth building element is not impaired by degradation and/or decomposition and/or oxidation.

The term “significantly lower” in this context is to be understood as a factor between 100 and 10,000. Thus, the short-life layer can be degradable within 3 to 12 months under normal soil environmental conditions, while the long-life layer is stable and durable for over 10 years or even over 100 years. A preferred embodiment provides that upon contact with moisture, the lifespan of the first layer is less than 6 months and the lifespan of the second layer is greater than 30 years.

The earthwork element can be used for different purposes. Here, the earthwork element can be designed in particular as a sheet pile wall element or as a pipe element or as a cable element or as a flat body. A flat body is understood to mean, in particular, a flexible body with a large surface area in relation to its thickness or thickness. A sheet can be a panel, a mat, a plate, a film or similar.

One aspect is that in the case of an earthwork element in the form of a flat body with at least two layers, in particular at least three layers, in the installed position at least the lower layer, in particular the two outer layers, is made of the degradable and / or less resistant material. As a result, abrasion caused by installation does not lead to the entry of small particles into the environment.

A particularly advantageous aspect is that the earthwork element has a joint area which is intended for connection to another earthwork element. In this way, at least two earthwork elements can be connected to one another. In particular, at least one joint area of an earthwork element is in a partially overlapping positioning with an adjacent earthwork element.

One aspect is that the adjacent earthwork elements are arranged to overlap one another. In particular, each of the adjacent earthwork elements has a joint area and these joint areas are the ones that overlap. This allows a combination of several earthwork elements to be created to form an earthwork installation.

Preferably, in the case of an earthwork element with at least two different layers, the second layer in the joint area is made of a durable material. In particular, the joint area is free of a material of the first layer. This can ensure that the connection is permanently and in particular permanently free of gaps and/or a simplified production of a positive and/or cohesive connection is made possible.

The joint area is a lock part in the case of an earthwork element as a sheet pile wall element, a sleeve in the case of an earthwork element as a pipe, a free connection end in the case of an earthwork element as a cable and at least one of the edges in the case of an earthwork element as a surface element, in particular film.

A lock part can be designed as a tongue or groove on an earthwork element. An earthwork element preferably has two lock parts, one designed as a groove, the other designed as a tongue corresponding to the groove. This makes it possible to combine two earthwork elements to form an earthwork installation.

In particular, in the case of an at least two-layer surface element, the production of a connection to another surface element is made easier if the joint area is free of the first layer with the degradable material. This improves the possibility of welding foils together in the joint area.

One aspect is that the second layer forms the back of a sheet pile element and the first layer forms an outside of the sheet pile element. In particular, in a sheet pile wall element it is provided that the second layer is arranged as an inner layer between two first layers, the first layers being the outer surfaces of the sheet pile wall element.

One aspect is that in an earthwork element, the second layer forms the inside of a jacket of a cable element or the inside of a pipe element and the first layer forms an outside of a jacket of a cable element or the outside of a pipe element.

One aspect is that in an earth building element, the second layer forms the underside of a surface body and the first layer forms a top side of a surface body. This ensures that no undesirable substances are removed from the film when it is covered with flooring material.

The invention also relates to an earthwork installation, which consists of at least two earthwork elements connected to one another in a form-fitting and/or cohesive manner, with at least one of the earthwork elements being designed according to one of the preceding claims. This makes it possible to introduce a sustainable technical structure into the ground.

One aspect is that the earthwork installation is designed as a sheet pile wall. A sheet pile wall consists of at least two sheet pile wall elements, which are designed as earthwork elements according to one of the preceding claims. This ensures that a sheet pile wall can be constructed from lightweight sheet pile wall elements without abrasion of plastic being released into the environment.

One aspect is that the earthwork installation is designed as a pipe installation. A pipe installation consists of at least two pipe elements, which are designed as earthwork elements according to one of the preceding claims. This makes it possible to insert a pipe installation, for example an empty pipe, into the ground without abrasion of plastic being introduced into the environment.

One aspect is that the earthwork installation is designed as a cable installation. A cable installation consists of at least two cable elements, which are designed as earthwork elements according to one of the preceding claims. This makes it possible to insert a cable installation into the ground without abrasion of plastic being released into the environment.

The degradability of the abrasion pieces or through abrasion pieces that are mineral and/or metallic ensures that no microplastics are introduced into the soil.

One aspect is that the earthwork installation is designed as a surface installation. A surface installation, for example a geotextile, a film seal or a protective panel, consists of at least two surface building elements, which are designed as an earthwork element according to one of the preceding claims.

A protective panel is a solid, flat body with a small thickness, which is installed in the ground above infrastructure elements such as cable lines or pipes and can thus warn a machine operator of possible dangers when the ground is later opened or protect the infrastructure from unwanted damage.

• 1 zeigt eine schematische Darstellung eines Erdbauelements;
• 2 zeigt eine schematische Darstellung einer Erdbauinstallation, insbesondere als eine Spundwand in einer ersten Ausführungsform;
• 2 zeigt eine schematische Darstellung einer Erdbauinstallation, insbesondere als eine Spundwand in einer zweiten Ausführungsform;
• 4 zeigt eine schematische Darstellung einer Erdbauinstallation, insbesondere als eine Rohrinstallation;
• 5 zeigt eine schematische Darstellung einer Erdbauinstallation, insbesondere als eine Kabelinstallation;
• 6 zeigt eine schematische Darstellung einer Erdbauinstallation, insbesondere als eine Flächeninstallation, in einer ersten Ausführungsform;
• 7 zeigt eine schematische Darstellung einer Erdbauinstallation, insbesondere als eine Flächeninstallation, in einer zweiten Ausführungsform.

The invention allows for different embodiments. Some examples are listed below. The invention is not limited to the embodiments shown. Individual or several features of the following embodiments can also be combined with one another.

• 1 shows a schematic representation of an earthwork element;
• 2 shows a schematic representation of an earthworks installation, in particular as a sheet pile wall in a first embodiment;
• 2 shows a schematic representation of an earthwork installation, in particular as a sheet pile wall in a second embodiment;
• 4 shows a schematic representation of an earthworks installation, in particular as a pipe installation;
• 5 shows a schematic representation of an earthworks installation, in particular as a cable installation;
• 6 shows a schematic representation of an earthworks installation, in particular as a surface installation, in a first embodiment;
• 7 shows a schematic representation of an earthworks installation, in particular as a surface installation, in a second embodiment.

1 shows a schematic representation of the basic structure of an earthwork element 1 as it occurs in all of the following exemplary embodiments. The earthwork element 1 consists of at least one first layer 2.

The earth building element is now either designed in such a way that the at least one layer 2 consists of at least one material 4, 5, 6, which is a biodegradable material 4 and/or an inorganic, preferably mineral material 5 and/or plant-based material 6 Base contains.

The earthwork element is alternatively designed in such a way that the earthwork element 1 has at least one further, second layer 3, which consists of at least one material 7 that is resistant to environmental influences, in particular of a polymer.

According to a further alternative, the earthwork element is designed in such a way that the at least one layer 2 consists of at least one material 4, 5, 6 and the further layer 3 consists of at least one material 7 that is resistant to environmental influences.

The at least one first layer 2 consists of a material 4, 5, 6, which has one or more components from the group of a biodegradable material 4 and an inorganic material 5 and a plant-based material 6.

In the following 2 until 6 Different designs of earthwork installations 22, each consisting of several earthwork elements 1, are shown.

The earthwork elements 1 have at least one joint area 15, with adjacent earthwork elements 1 being connected to their joint areas 15.

A special embodiment for earthwork elements made of a layer 2 and a further layer 3 provides that the earthwork elements 1 in the joint areas 15 are free of a material 4, 5, 6 of the first layer 2.

The 2 and 3 show a sheet pile wall 23 as an earthwork installation 22. In the illustration, two sheet pile wall elements 11 are shown from the sheet pile wall 23. The joint area 15 can be designed, for example, as a lock part in the sheet pile wall elements 11. The earthwork elements 11 are connected to one another in a form-fitting and/or material-locking manner.

In the 2 In the first embodiment shown, the sheet pile wall elements 11 have a layer 2 and a second layer 3. The second layer 3 forms the back 17 of the sheet pile wall elements 11 and the first layer 2 forms an outside 19 of the sheet pile wall elements 11.

In the 3 In the second embodiment shown, the sheet pile wall elements 11 have a layer 2 and a second layer 3. The one layer 2 forms the back 17 of the sheet pile walls elements 11 and the outside 19 of the sheet pile wall elements 11. The core 16 of the sheet pile wall elements 11 consists of the second layer 3.

The 4 shows a pipe installation 24 as an earthworks installation 22. Two pipe elements 12 of the pipe installation 24 are shown in the illustration. The joint areas 15 can be designed as a sleeve in the pipe elements 12, for example. According to the embodiment shown, the second layer 3 forms the inside 18 of a tube element 12. An outside 19 of a tube element 12 is formed by the first layer 2.

The 5 shows a cable installation 25 as an earthwork installation 22. Two cable elements 13 of the cable installation 25 are shown in the illustration. The joint areas 15 can be designed as a connection in the cable elements 13, for example. According to the embodiment shown, the second layer 3 forms the inside 18 of a jacket of a cable element 13. An outside 19 of a jacket of a cable element 13 is formed by the first layer 2.

The 6 shows a surface installation 26 as an earthworks installation 22. The illustration shows two surface bodies 14 of the surface installation 26 in a first embodiment. The flat bodies 14 are in particular flexible, for example designed as a film or knitted fabric or scrim or knitted fabric. The joint areas 15 are designed in the flat bodies 14, for example as the edge of the flat bodies 14. In the case of flat bodies with a first layer 2 and a second layer 3, according to the embodiment shown, the second layer 3 forms the underside 20 of the flat body 14, whereas the top 21 of the flat body 14 is formed by the first layer 2.

The 7 shows a surface installation 26 as an earthworks installation 22. The illustration shows two surface bodies 14 of the surface installation 26 in a second embodiment. Here too, the flat bodies 14 are flexible, for example designed as a film or knitted fabric or scrim or knitted fabric. The joint areas 15 are designed in the flat bodies 14, for example as the edge of the flat bodies 14. The flat bodies 14 consist of a second layer 3, on which a first layer 2 is formed on both sides. The bottom 20 and the top 21 of the surface bodies 14 are formed by the first layers 2. The core 16 is formed by the second layer 3.

Reference symbols

1

Earth building element

2

(first) layer

3

(second) layer

4

Material (biodegradable)

5

Material (inorganic)

6

Material (vegetable based)

7

Material (resistant to environmental influences)

11

Sheet pile wall element

12

Pipe element

13

Cable element

14

Surface body

15

Impact area

16

core

17

back

18

inside

19

Outside

20

bottom

21

Top

22

Earthwork installation

23

Retaining wall

24

Pipe installation

25

Cable installation

26

Surface installation

QUOTES INCLUDED IN THE DESCRIPTION

This list of documents listed by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• CH 550290 A [0002]
• DE 102015105133 B4 [0003]
• EP 2930274 B1 [0004]
• DE 29504062 U1 [0005]
• DE 102017007834 A1 [0006]
• DE 102020005082 B3 [0007]

Claims (12)

Earth building element (1), which has: a) at least one layer (2) made of at least one material (4, 5, 6), characterized in that b) the at least one layer (2) b.1) made of at least one biodegradable Material (4) consists and / or b.2) consists of at least one inorganic, preferably mineral material (5) b.3) and / or contains at least one plant-based material (6) and / or c) the earth building element (1 ) has at least one further layer (3), which consists of at least one material (7) that is resistant to environmental influences, in particular a polymer. Earth building element (1) according to the preceding claim, wherein the first layer (2) and/or the second layer (3) is produced by extrusion, in particular that the first layer (2) and the second layer (3) are produced together by coextrusion are. Earth building element (1) according to one of the preceding claims, wherein the first layer (2) is applied to the second layer (3). Earth building element (1) according to one of the preceding claims, wherein the plant-based material (6) of the first layer (2) contains at least 20 percent by volume of one of the materials from the group of grain husks and/or wood chips and/or bamboo chips and/or flax fibers and/or or vegetable starch and/or grass clippings and/or cellulose, in particular waste paper fibers. Earth building element (1) according to one of the preceding claims, wherein the inorganic material (5) consists of at least one metal and/or at least one mineral and/or of a glass. Earth building element (1) according to one of the preceding claims, wherein the first layer (2) consists exclusively of the at least one biodegradable material (4). Earth building element (1) according to one of the preceding claims, wherein the material (7) resistant to environmental influences is a synthetic polymer. Earth building element (1) according to one of the preceding claims, wherein the service life of the first layer (2) is significantly shorter than the service life of the second layer (3), in particular under the influence of the environmental influences common in earthworks. Earthwork element (1) according to one of the preceding claims, wherein the earthwork element (1) is designed as a sheet pile wall element (11) or as a pipe element (12) or as a cable element (13) or as a, in particular flexible, flat body (14). Earthwork element (1) according to one of the preceding claims, wherein the earthwork element (1) has at least one joint area (15) for connecting two earthwork elements (1), preferably in partially overlapping positioning to one another, in particular in the case of one earthwork element (1) with a second Layer (3) the joint area (15) consists of durable material (7) and is in particular free of a material (4, 5, 6) of the first layer (2). Earth building element (1) according to one of the preceding claims, wherein the second layer (3) forms the back side (17) of a sheet pile wall element (11) and the first layer (2) forms an outside (19) of the sheet pile wall element (11); and or the second layer (3) forms the inside (18) of a jacket of a cable element (13) or the inside of a pipe element (12) and the first layer (2) forms an outside (19) of a jacket of a cable element (13) or the outside ( 19) forms a tubular element (12); and or the second layer (3) forms the underside (20) of a sheet (14) and the first layer (2) forms a top (21) of a sheet (14). Earthworks installation (22), wherein the earthworks installation (22) has at least two earthworks elements (1) connected to one another in a form-fitting and/or cohesive manner, which are designed according to one of the preceding claims, in particular, the earthwork installation (22) is one Sheet pile wall (23) consisting of at least two sheet pile wall elements (11) according to one of the preceding claims; and or Pipe installation (24) consisting of at least two pipe elements (12) according to one of the preceding claims; and or Cable installation (25) consisting of at least two cable elements (13) according to one of the preceding claims; and or Surface installation (26) consisting of at least two surface components (14) according to one of the preceding claims.

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