METHOD FOR THE UNDERGROUND LAIDING OF SEWER SYSTEM COMPONENTS

Description

[0001] The present invention relates to a method for laying underground components of a sewer system, in particular pipes, shafts or structures, especially shaft structures, made of concrete, reinforced concrete, fiber-reinforced concrete, textile-reinforced concrete, concrete with alternative binders, e.g. alkali-activated binders or polymers, made of ceramic building materials, e.g. stoneware, or of a polymer.

[0002] For example, pipes, especially water and wastewater pipes, are regularly laid in trenches. To prevent buoyancy, for instance when using flowable fill for buried pipes, the process involves excavating a trench (pipe trench), placing the pipe in the trench, and weighting it down from above with big bags (transport bags). Flowable fill is then poured into the trench up to the top of the pipe. After about a day, the flowable fill has solidified, and the big bags can then be removed. In a second step, the flowable fill is poured up to the underside of the road structure. This procedure also takes a day. This is quite time-consuming and therefore costly. Documents DE202015104314 U1, DE102007054169 A1, and JP H04157272 A disclose methods for the underground installation of sewer system components.

[0003] The present invention is therefore based on the objective of providing a more cost-effective method for laying (installing) sewer system components, in particular pipes, shafts or structures, especially manhole structures, made of concrete, reinforced concrete, fiber-reinforced concrete, textile-reinforced concrete, concrete with alternative binders, e.g. alkali-activated binders or polymers, made of ceramic building materials, e.g. stoneware, or of a polymer, using flowable fill.

[0004] According to the invention, this problem is solved by a method for laying sewer system components underground according to claim 1. Alternatively, this problem is solved by methods according to claims 2, 7 and 8.

[0005] According to a particular embodiment of the present invention, to fix the at least one channel system component at at least one point of the channel system component transversely to the longitudinal extent of the at least one channel system component, at least one ground anchor with anchor strap is installed in the ground on opposite sides, the anchor straps are connected to each other above the at least one channel system component and tensioned by means of a tensioning device to lash down the at least one channel system component.

[0006] Alternatively, it may be provided that, to fix the at least one channel system component at least one point of the at least one channel system component transversely to the longitudinal extent of the at least one channel system component, at least one ground anchor with anchor strap is installed in the ground on opposite sides, a ballast element with at least one recess on its underside is designed in such a way that the ballast element can be placed on the at least one channel system component, the anchor straps are connected to each other above the ballast element and are tensioned by means of a tensioning device to lash down the ballast element.

[0007] According to the invention, to fix the at least one channel system component at at least one point of the at least one channel system component, a ballast element with at least one recess on its underside, which is designed such that the ballast element can be placed on the at least one channel system component, is placed on the at least one channel system component, at least one ground anchor with anchor strap is installed in the ground on opposite sides transversely to the longitudinal extent of the at least one channel system component, the anchor straps are connected to each other above the ballast element and tensioned by means of a tensioning device to lash down the ballast element.

[0008] Advantageously, the at least one recess on the underside has a section in the upper area that is essentially semicircular, preferably to which vertically or obliquely outwardly extending surfaces are attached.

[0009] Advantageously, the at least one ballast element has at least one further recess on its upper side, which is designed in such a way that a tube can be received or arranged in it.

[0010] In particular, it may be provided that the at least one further recess on the upper side of the at least one ballast element has a section in the lower area that is essentially semicircular, preferably to which vertically or obliquely outwardly running surfaces adjoin.

[0011] Furthermore, it may be provided that the canal system component is a pipe, a shaft or a structure, in particular a shaft structure, made of concrete, reinforced concrete, fiber-reinforced concrete, textile-reinforced concrete, concrete with alternative binders, e.g. alkali-activated binders or polymers, made of ceramic building materials, e.g. stoneware, or of a polymer.

[0012] According to a further particular embodiment of the present invention, to fix the at least one channel system component at at least one point of the at least one channel system component, an earth anchor with anchor strap is installed in the ground on opposite sides, and each of the anchor straps is attached to the at least one channel system component for direct lashing of the channel system component.

[0013] According to the invention, to fix the at least one channel system component, an earth anchor with anchor strap is installed in the ground at at least one point on opposite sides of the at least one channel system component, a ballast element with at least one recess on its underside is designed in such a way that the ballast element can be placed on the at least one channel system component, and each of the anchor straps is attached to the ballast element for direct lashing of the at least one channel system component.

[0014] According to the invention, it is provided that, in order to fix the at least one channel system component at at least one point of the at least one channel system component, a ballast element with at least one recess on its underside, which is designed such that the ballast element can be placed on the at least one channel system component, an earth anchor with anchor strap is installed in the ground on opposite sides and each of the anchor straps is attached to the ballast element for direct lashing of the at least one channel system component.

[0015] Advantageously, the at least one recess on the underside has a section in the upper area that is essentially semicircular, preferably to which vertically or obliquely outwardly extending surfaces are attached.

[0016] Advantageously, the at least one ballast element has at least one further recess on its upper side, which is designed in such a way that a tube can be received or arranged in it.

[0017] In particular, it may be provided that the at least one further recess on the upper side of the at least one ballast element has a section in the lower area that is essentially semicircular, preferably to which vertically or obliquely outwardly running surfaces adjoin.

[0018] In particular, it may be provided that the canal system component is a structure, especially a shaft structure, made especially of concrete, reinforced concrete, fiber-reinforced concrete, textile-reinforced concrete, concrete with alternative binders, e.g. alkali-activated binders or polymers, made of ceramic building materials, e.g. stoneware, or of a polymer.

[0019] According to a further particular embodiment of the present invention, the ballasting element consists of or comprises concrete, reinforced concrete, fiber-reinforced concrete, textile-reinforced concrete, concrete with alternative binders, e.g. alkali-activated binders or polymers, wood, metallic materials or a polymer.

[0020] Advantageously, the method includes lateral sealing of a section of the trench containing the channel system component before the injection of liquid soil.

[0021] In particular, it can be provided that for sealing off, a sealing element with at least one recess on its underside, which is designed in such a way that the sealing element can be placed on the at least one channel system component, preferably in a form-fitting manner, on which at least one channel system component is placed, preferably wherein the sealing element is fixed in the trench by means of at least two earth anchors with anchor straps.

[0022] Ideally, the barrier element is designed to be at least two parts, and the parts of the barrier element are placed on the at least one duct system component simultaneously or one after the other.

[0023] In particular, it may be provided that the barrier element consists of or comprises concrete, reinforced concrete, fiber-reinforced concrete, textile-reinforced concrete, concrete with alternative binders, e.g. alkali-activated binders and polymers made of wood or metallic materials.

[0024] Advantageously, the liquid soil is produced on site or in a processing plant near the construction site using at least some of the excavated material generated during the digging of the trench.

[0025] According to a further particular embodiment of the present invention, the trench has at least one vertical side wall.

[0026] Finally, it may be stipulated that the ditch has at least one sloping side wall. For example, this could be an embankment.

[0027] The present invention is based on the surprising finding that by fixing the channel system component using ground anchors, the liquid soil can be introduced up to the top edge of the trench in a single step, thereby saving time. This in turn results in cost savings.

[0028] The time savings also lead to a higher laying performance.

[0029] By using ground anchors, and especially in combination with ballast elements according to specific embodiments, consistent positioning of pipes in pipe trenches, for example, can always be achieved, and buoyancy protection can be guaranteed. In particular, according to specific embodiments, secure positioning of different pipes (regardless of material), such as water, wastewater, and utility pipes, can be achieved.

[0030] At least in certain embodiments, several pipes, for example, can be laid in a pipe trench in one day, whereas prior art methods require two work steps and at least two days. Furthermore, this requires a continuous pipe trench, which is faster and therefore requires less time and thus lower costs.

[0031] At least in certain embodiments, flexible construction sections are possible through ballasting elements and partitioning elements.

[0032] Short construction times also lead to relief for local residents and a reduction in traffic congestion.

[0033] Furthermore, this allows for optimal installation by avoiding compaction errors. This, in turn, leads to a longer service life for, for example, installed pipes.

[0034] If the excavated material is used to produce the liquid soil, this is climate-friendly, as the excavated material does not need to be disposed of.

[0035] Further features and advantages of the invention will become apparent from the attached claims and from the following description, in which several exemplary embodiments are explained in detail with reference to the schematic drawings. These show: Figure 1: A sectional view transverse to the longitudinal extent of a trench during the installation of a pipe according to a first particular embodiment of the present invention; Figures 2 to 4: Phases of the installation of a ground anchor according to a particular embodiment of the present invention; Figure 5: A detailed view of Figure 1Figure 6: A sectional view transverse to the longitudinal extent of a trench during the installation of a pipe according to a second particular embodiment of the present invention; Figure 7: A sectional view transverse to the longitudinal extent of a trench during the installation of a structure according to a further particular embodiment of the present invention; Figure 8: A sectional view transverse to the longitudinal extent of a trench during the installation of a structure according to a further particular embodiment of the present invention; Figure 9: A front view of a ballast element according to a particular embodiment of the present invention; Figure 10: The ballast element of Figure 9in the installed state; Figure 11 a front view of a ballast element according to a further particular embodiment of the present invention, fitted over a tube; Figure 12 a front view of a ballast element according to a further particular embodiment of the present invention, fitted over a tube; Figure 13 a front view of a bulkhead element according to a particular embodiment of the present invention; Figure 14 the bulkhead element of Figure 13in the installed state; Figure 15 a bulkhead element according to a further particular embodiment of the present invention in the installed state; Figure 16 a front view of a bulkhead element according to a further particular embodiment of the present invention; Figure 17 a front view of a bulkhead element according to a further particular embodiment of the present invention, fitted over a pipe; Figure 18 a front view of a bulkhead element according to a further particular embodiment of the present invention, fitted over a pipe; Figure 19 a top view (below) and a side view (above) of buried pipes including manhole structure according to a particular embodiment of the present invention; Figure 20 a plan view (below left), a sectional view AA (above left) and a sectional view BB (above right) of the manhole structure of Figure 19 .

[0036] In the Figure 1A pipe 3 with a base, which can be made of, for example, concrete, reinforced concrete, or steel fiber reinforced concrete, is placed in the excavated trench 16 on the horizontal floor 17 of the trench, in the longitudinal direction of the trench 16, after the trench 16 has been excavated. The pipe 3 is also secured by means of an earth anchor 1, an anchor strap 2, and a turnbuckle 13 (see also Figure 5 ) and a tensioning device 14 in the excavated trench 16, fixed to the ground 17. The ground anchors 1 are installed on opposite longitudinal sides of the pipe 3 in the ground 18.

[0037] Furthermore, a section of trench 16 containing pipe 3 has already been sealed off by means of a shoring 12 along the longitudinal extension of trench 16.

[0038] In the next step, flowable fill 21, which is produced, for example, from the excavated material and is self-leveling in this example, can be filled into the trench 16 up to its top edge 19. After the flowable fill has solidified, the pipe is then laid or installed in the ground with its top closed.

[0039] The Figures 2 to 4 Figure 1 shows an example of the installation of a ground anchor 1 in the ground 18. The ground anchor 1 is equipped with an anchor strap 2. The ground anchor 1 is driven into the ground using, for example, a steel pipe 8 (see Figure 1). Figure 3 The upper end of the anchor strap 2 remains above ground level 18.

[0040] Afterwards, a characteristic tensile force F Zk can be determined using a lifting device 9 and a load cell 10 associated with it (see. Figure 4 ).

[0041] The one in Figure 6 The scene depicted differs from the one in the Figure 1The scene depicted is essentially only similar in the type of pipe laid (5). It is a circular pipe, for example made of concrete, reinforced concrete, or steel fiber reinforced concrete. However, the pipe could also have a profile of its own.

[0042] In the Figure 7 This does not concern the laying of a pipe, but rather of a structure 20, more precisely a shaft structure, which comprises shaft components 6, for example made of concrete, reinforced concrete or steel fiber reinforced concrete, and a cover plate 7, for example made of concrete, reinforced concrete or steel fiber reinforced concrete. In the example shown, the structure 20 is fixed on opposite sides by means of an earth anchor 1 installed in the ground 18 with an anchor strap 2, which is attached to the structure 20 under tension on one side to the cover plate 7 and on the other side to the shaft component 6, by direct lashing.

[0043] In the Figure 8is also a structure 20, more precisely a shaft structure, comprising shaft components 6 made of concrete, reinforced concrete, or steel fiber reinforced concrete and a cover plate 7 made of concrete, reinforced concrete, or steel fiber reinforced concrete, placed on the bottom 17 of the trench 16. However, the side walls of the trench 16 are not vertical as in the embodiments described above, but sloping, and form a respective embankment 15.

[0044] In this example, two or three ground anchors 1 with anchor straps 2 are provided on each side of the structure 20. The ground anchors 1 are installed in the embankments 15. The upper ends of the anchor straps are, for example, attached under tension to the cover plate 7.

[0045] Figure 9Figure 1 shows a front view of a ballasting element 22 according to a particular embodiment of the present invention. The ballasting element 22 has a bottom surface (trench support surface) 24, which serves to be placed or supported on a trench bottom. A system consisting, for example, of a pipeline and a ballasting element can thus have a fixed support on a trench bottom.

[0046] In the present example, the ballast element 22 has three recesses 26, 28 and 30 on its underside 24, wherein the left recess 26 and the right recess 30 are identically designed and arranged symmetrically to the central recess 28. The central recess 28 is significantly larger than the lateral recesses 26 and 28 and serves, for example, to accommodate a main tube.

[0047] In this example, all three recesses 26 to 30 have a section 26a, 28a, and 30a respectively in the upper area, which is essentially semicircular, to which vertically extending surfaces 26b, 28b, and 30b respectively are attached.

[0048] In this example, the ballast element 22 has no recesses on its sides 25 facing the side walls of a trench. However, on the upper surface 32 of the ballast element 22, there are two recesses 34 and 36 arranged symmetrically, similar to the recesses 26 and 30.

[0049] In the Figure 10 is ballast element 22 of Figure 9The installed state is shown as an example. Each of the recesses 26, 28, 30, 34, and 36 contains a pipe: a main pipe 38 in recess 28 and a pipe 40 in each of the other recesses. In this example, the pipes 40 in the upper recesses 34 and 36 were placed in the upper recesses 34 and 36 after the ballast element 22 was fitted over the main pipe 38 and the lateral pipes 40. The ballast element 22, and thus also the main pipe 38 and the pipes 40, were then fixed using ground anchors 1 with anchor straps 2.

[0050] Figure 10 The figure below shows a longitudinal section view. For example, several ballasting elements 22 can be arranged at intervals from each other along the longitudinal extension of the main tube 38 and the parallel tubes 40.

[0051] Figure 11Figure 1 shows a ballast element 22 according to a further particular embodiment of the present invention in a state already fitted over a main tube 38. In contrast to the one described in the Figure 9 However, the ballast element shown has only one recess on its underside 24, namely a recess 28 for the main tube 38.

[0052] The one in Figure 12 The ballast element 22 shown, like the one in the Figure 9 The ballast element shown basically has the same number of recesses, however, these are positioned slightly differently on the underside 24 and the ballast element has different proportions.

[0053] The ballasting elements described above usually remain in the ground when pipes are laid.

[0054] Figure 13Figure 1 shows an example of a bulkhead element 42 according to a particular embodiment of the present invention. In the present example, the bulkhead element 42 is designed in two parts. The two parts 42a and 42b are mirror images of each other with respect to the arrangement of the recesses 46, 48, 50, 52, and 54 and can be positively connected by appropriately shaping a connecting side 44. Unlike the ballast elements shown above, the recess 48 in the center of the underside 56 of the bulkhead element 42 in this example has a section 48a in the upper region that is essentially semicircular, to which surfaces 48b extend obliquely inwards.

[0055] How in combination with the Figure 14This results in a form-fitting enclosure of an externally complementary main pipe 38. As a result, in principle no liquid soil can flow between the sealing element 42 and the main pipe 38.

[0056] Figure 14 However, it also shows further pipes 40 in the remaining recesses 46, 50, 52 and 54. Gaps in the area of ​​the recesses 46, 50, 52 and 54 between the pipes 40 and the sealing element 42 can also be sealed, for example, by materials commonly found on a construction site, such as wooden boards, wooden strips, etc.

[0057] The barrier element 42 also includes a barrier wall 42c, for example made of metal, which surrounds the barrier element 42 on both sides and extends above the barrier element, in particular to prevent liquid soil from flowing over to the other side in the trench above the barrier element 42.

[0058] As can also be seen from the Figure 14The resulting bulkhead element 42 in this example is fixed at a point along the longitudinal extent of the main pipe 38 and the parallel pipes 40, like the ballast elements described above, by means of earth anchors 1 and anchor straps 2.

[0059] Figure 15 A corresponding situation shows how Figure 14 , however with a slightly modified bulkhead element 42. The modification essentially only concerns the design of the top surface 58 of the bulkhead element 42.

[0060] Figure 16 Figure 1 shows an example of a partition element 42 according to a further particular embodiment of the present invention. In this example, the partition element has a total of only four recesses 46, 48, 50 and 52.

[0061] Figure 17Figure 1 shows another example of a bulkhead element 42, which is already "placed" over a main pipe 38. In this example, the bulkhead element 42 has only two recesses 46 and 48 on its underside 56 and two recesses 52 and 54 on its upper side 58. However, it has a recess 60 on its right side 59 for the lateral insertion of a pipe (not shown).

[0062] Figure 18 shows another example of a bulkhead element 42. This one, however, has - like the bulkhead element of Figure 13 - a total of five cutouts 46, 48, 50, 52 and 54, however these are all located on the underside 56.

[0063] Finally, the Figures 19(above: side view; below: top view) and 20 the fixing by means of earth anchors 1 and anchor straps 2 alone, but also the fixing by means of ballast elements 22 and earth anchors 1 and anchor straps 2 of a main pipe 38 and of pipes 40 as well as the fixing of a shaft 62 by means of earth anchors 1 and anchor straps 2.

[0064] The barrier elements are generally reusable.

[0065] To secure components of a sewer system, ground anchors and anchor straps can be used alone, while ballast elements can be used in combination with ground anchors and anchor straps, for example, alternating along the length of the respective sewer system components. The spacing between the ballast elements can be, for example, five meters.

[0066] The features of the invention disclosed in the foregoing description, in the drawings and in the claims can be essential for the realization of the invention in its various embodiments, both individually and in any combination. Reference symbol list

[0067] 1 Ground anchor 2 Anchor straps 3 Pipe with base 5 Pipe 6 Shaft components 7 Cover plate 8 Steel pipe 9 Lifting device 10 Load cell 12 Shoring 13 Turnbuckle 14 Tensioning device 15 Embankments 16 Trench 17 Soil 18 Soil 19 Top edge 20 Structure 21 Liquid soil 22 Ballasting elements 24 Underside 25 Sides 26, 28, 30 Recesses 26a, 28a, 3oa Sections 26b, 28, 30b Surfaces 32 Top side 34, 36 Recesses 34a, 36a Sections 34b, 36b Surfaces 38 Main pipe 40 Pipes 42 Sealing element 42a, 42b Parts 42c bulkhead 44 connecting sides 46, 48, 50, 52, 54 recesses 48a section 48b surface 56 bottom 58 top 59 side 60 recess 62 shaft

Claims

1. Method for laying sewer-system components underground, comprising: - digging a trench (16), in particular a pipe trench, - setting down at least one sewer-system component in the dug trench (16), - fixing the set-down at least one sewer-system component in the dug trench (16) by means of at least two earth anchors (1) at at least one position in the longitudinal extent of the at least one sewer-system component, and - introducing liquid soil into the trench (16) up to the top edge (19) thereof, wherein, for fixing the at least one sewer-system component at at least one position of the at least one sewer-system component, transverse to the longitudinal extent of the at least one sewer-system component, on opposite sides, in each case at least one earth anchor (1) with an anchor strap (2) is installed in the soil (18), a ballasting element (22) having at least one recess (26, 28, 30) on its bottom side (24), which at least one recess is configured in such a way that the ballasting element (22) is mountable onto the at least one sewer-system component, is placed onto the at least one sewer-system component, and the anchor straps (2) are connected to one another above the ballasting element (22) and are tensioned by means of a tensioning device (14) for tie-down lashing of the ballasting element (22).

2. Method for laying sewer-system components underground, comprising: - digging a trench (16), in particular a pipe trench, - setting down at least one sewer-system component in the dug trench (16), - fixing the set-down at least one sewer-system component in the dug trench (16) by means of at least two earth anchors (1) at at least one position in the longitudinal extent of the at least one sewer-system component, and - introducing liquid soil into the trench (16) up to the top edge (19) thereof, wherein, for fixing the at least one sewer-system component at at least one position of the at least one sewer-system component, a ballasting element (22) having at least one recess (26, 28, 30) on its bottom side (24), which at least one recess is configured in such a way that the ballasting element (22) is mountable onto the at least one sewer-system component, is placed onto the at least one sewer-system component, transverse to the longitudinal extent of the at least one sewer-system component, on opposite sides, in each case at least one earth anchor (1) with an anchor strap (2) is installed in the soil (18), and the anchor straps (2) are connected to one another above the ballasting element (22) and are tensioned by means of a tensioning device (14) for tie-down lashing of the ballasting element (22).

3. Method according to Claim 1 or 2, wherein the at least one recess (26, 28, 30) on the bottom side (24) has in the upper region a portion (26a, 28a, 30a) which is substantially partially circular, preferably being adjoined by vertically or obliquely outwardly extending surfaces (26b, 28b, 30b).

4. Method according to one of preceding Claims 1 to 3, wherein the at least one ballasting element (22) has at least one further recess (34, 36) on its top side (32), which at least one further recess is configured in such a way that a pipe is able to be received or arranged therein.

5. Method according to Claim 4, wherein the at least one further recess (34, 36) on the top side (32) of the at least one ballasting element (22) has in the lower region a portion (34a, 36a) which is substantially partially circular, preferably being adjoined by vertically or obliquely outwardly extending surfaces (34b, 36b).

6. Method according to one of the preceding claims, wherein the sewer-system component is a pipe (3; 5; 38; 40), a shaft (62) or a structure (20), in particular a shaft structure, in particular composed of concrete, reinforced concrete, fibre concrete, textile concrete, concrete with alternative binders, for example alkali-activated binders or polymers, of ceramic building materials, for example stoneware, or of a polymer.

7. Method for laying sewer-system components underground, comprising: - digging a trench (16), in particular a pipe trench, - setting down at least one sewer-system component in the dug trench (16), - fixing the set-down at least one sewer-system component in the dug trench (16) by means of at least two earth anchors (1) at at least one position in the longitudinal extent of the at least one sewer-system component, and - introducing liquid soil into the trench (16) up to the top edge (19) thereof, wherein, for fixing the at least one sewer-system component at at least one position of the at least one sewer-system component, on opposite sides, in each case one earth anchor (1) with an anchor strap (2) is installed in the soil (18), a ballasting element (22) having at least one recess (26, 28, 30) on its bottom side (24), which at least one recess is configured in such a way that the ballasting element (22) is mountable onto the at least one sewer-system component, is placed onto the at least one sewer-system component, and each of the anchor straps (2) is fastened to the ballasting element (22) for direct lashing of the at least one sewer-system component.

8. Method for laying sewer-system components underground, comprising: - digging a trench (16), in particular a pipe trench, - setting down at least one sewer-system component in the dug trench (16), - fixing the set-down at least one sewer-system component in the dug trench (16) by means of at least two earth anchors (1) at at least one position in the longitudinal extent of the at least one sewer-system component, and - introducing liquid soil into the trench (16) up to the top edge (19) thereof, wherein, for fixing the at least one sewer-system component at at least one position of the at least one sewer-system component, a ballasting element (22) having at least one recess (26, 28, 30) on its bottom side (24), which at least one recess is configured in such a way that the ballasting element (22) is mountable onto the at least one sewer-system component, is placed onto the at least one sewer-system component, on opposite sides, in each case one earth anchor (1) with an anchor strap (2) is installed in the soil (18), and each of the anchor straps (2) is fastened to the ballasting element (22) for direct lashing of the at least one sewer-system component.

9. Method according to Claim 7 or 8, wherein the at least one recess (26, 28, 30) on the bottom side (24) has in the upper region a portion (26a, 28a, 30a) which is substantially partially circular, preferably being adjoined by vertically or obliquely outwardly extending surfaces (26b, 28b, 30b).

10. Method according to one of preceding Claims 7 to 9, wherein the at least one ballasting element (22) has at least one further recess (34, 36) on its top side (32), which at least one further recess is configured in such a way that a pipe is able to be received or arranged therein.

11. Method according to Claim 10, wherein the at least one further recess (34, 36) on the top side (32) of the at least one ballasting element (22) has in the lower region a portion which is substantially partially circular, preferably being adjoined by vertically or obliquely outwardly extending surfaces (34b, 36b).

12. Method according to one of Claims 7 to 11, wherein the sewer-system component is a structure (20), in particular a shaft structure, in particular composed of concrete, reinforced concrete, fibre concrete, textile concrete, concrete with alternative binders, for example alkali-activated binders or polymers, of ceramic building materials, for example stoneware, or of a polymer.

13. Method according to one of Claims 1 to 12, wherein the ballasting element (22) consists of or comprises concrete, reinforced concrete, fibre concrete, textile concrete, concrete with alternative binders, for example alkali-activated binders or polymers, wood, metallic materials or a polymer.

14. Method according to one of the preceding claims, further comprising: - laterally shielding a portion, containing the sewer-channel component, of the trench (16) before liquid soil (21) is introduced.

15. Method according to Claim 14, wherein, for shielding purposes, a shielding element (42) having at least one recess on its bottom side (56), which at least one recess is configured in such a way that the shielding element (42) is mountable, preferably in a form-fitting manner, onto the at least one sewer-system component, is placed onto the at least one sewer-system component, preferably wherein the shielding element (42) is fixed in the trench by means of at least two earth anchors (1) with an anchor strap (2).

16. Method according to Claim 15, wherein the shielding element (42) is of at least two-part design, and the parts (42a, 42b) of the shielding element (42) are placed onto the at least one sewer-system component simultaneously or in succession.

17. Method according to Claim 15 or 16, wherein the shielding element (42) consists of or comprises concrete, reinforced concrete, fibre concrete, textile concrete, concrete with alternative binders, for example alkali-activated binders or polymers, wood, metallic materials or a polymer.

18. Method according to one of the preceding claims, wherein the liquid soil (21) is produced on site or in a treatment plant close to the construction site using at least some of the dug-out material that accumulates during the digging of the trench (16).

19. Method according to one of the preceding claims, wherein the trench (16) has at least one vertical side wall.

20. Method according to one of Claims 1 to 18, wherein the trench (16) has at least one oblique side wall.