EP2946040B1 - Canal-sealing means - Google Patents

Description

The present invention relates to sealing channels in a water-carrying state, and in particular relates to a channel sealing system for sealing a channel in a water-carrying state, a channel section, a method for sealing a channel in a water-carrying state, and the use of a system for sealing a channel.

Channels are used, for example, to carry or transport water, for example to supply water to a hydropower plant. Channels are also known for the transport of water for other purposes, for example for irrigation purposes or for the transport of drinking water. In addition, canals are also known as waterways. In order to avoid or reduce loss of water, for example due to seepage into the adjacent earth areas, sewer seals are provided in the area of the sewer bottom surface, for example along the sewer base surface and the side embankment surfaces. For example, geomembranes are applied to trough-like structures made of concrete to frame the channel. Duct seals are also used, in particular, to subsequently seal existing ducts or to renew or repair existing seals. For this purpose, for example, a sealing membrane is applied to the existing boundary surfaces, for which purpose, for example, the channel is first drained in order to put the sealing membranes on and connect them to one another can. However, it has been shown that draining, or even partially defrosting water, is problematic, since on the one hand it is relatively expensive and on the other hand it means a relatively long interruption in the operation of the channel. Another problem can also arise in the case of directly adjacent buildings or structures, since the different pressure conditions in a drained channel section can lead to changes in the adjacent earth area, which in turn can lead to damage to the buildings or structures. From the DE 202008014492 U1 For example, a method is known in which a sewer seal is first composed of individual segments outside the water and is then lowered into the water onto the surfaces to be sealed with the aid of a differential water level generated. This method is suitable for sealing a sewer in a water-bearing condition. The lowering by means of a differential water level can also be used for flowing water in addition to standing water, at least to a certain extent of the water flow.

In NL 111897 C the laying of a seal is shown, in which sand is introduced into chambers of the sealing mat, while the sealing mat is rolled onto the bottom of the water using a kind of drum or roller. DE 10 2001 108 222 B3 describes the lowering of a channel seal by forming a basin in order to lower the seal with pumped-in water. NL 6711308 A describes the laying out of a seal or cover on the bottom of the water, pocket-like cavities being provided for receiving sand, for example. The filling takes place simultaneously with the lowering. NL 1025760 C2 describes a tiltable Absenkrampe, with which a sheet-like material, filled with support material, is laid on the water bottom. DE 31 44 092 A1 discloses a duct sealing system according to the preamble of claim 1.

There is a need to provide a channel in the water-carrying state which can be used even with larger flow rates and which is associated with the least possible effort.

This object is achieved by the channel sealing system for sealing a channel in a water-carrying state, by the channel section, by the method for sealing a channel in a water-carrying state and by the use of a system according to one of the independent claims. Exemplary embodiments are presented in the dependent claims.

According to the invention, a sewer sealing system is provided for sealing a sewer in the water-carrying state, which has a dispensing device and an introducing device. The spreading device is designed to apply sheet-like mat material on a first region of a water surface of a channel, so that the sheet-like mat material is arranged to float at the water level, the sheet-like mat material being at least partially formed with cavities for receiving a support material. The introduction device is designed to introduce support material into at least some of the cavities for a successive lowering of the sheet-like mat material until it rests on a channel base.

The provision of a mat material on the water surface and the subsequent lowering by means of the support material offer the advantage that the channel does not have to be restricted in its operation, in particular in its water flow. The use of a support material for lowering can be done by simple measures. In addition to the lowering, the support material also serves to hold the sheet-like mat material, which acts as a seal, permanently on the surfaces to be sealed. The introduction of the support material into the cavities serves e.g. In addition, during the lowering process, the water flowing past (while the sewer is running) cannot wash away the supporting material.

The term "canal" also includes other water-bearing structures and water-bearing bodies of water, and in particular also standing bodies of water, water containers or water storage basins.

For example, the sheet-like mat material is applied in a partial area of the channel cross section and is only lowered in a partial area. In one example, the material is spread out up to half of the channel, a separate holder being provided for the mat end projecting into the channel area when the water is flowing.

For example, the term "first area" refers to the entire channel cross-section, i.e. in a further example, the sheet-like mat material is spread out and lowered over the entire cross section.

In one example, the application device is designed to apply the sheet-like mat material to the water surface, the cavities being i) unfilled or ii) at least partially filled with air.

The term “mat material” denotes a material that is flat and has cavities, the cavities being partially connected to one another, for example. The mat material is, for example, lighter than water and floats on the water without further action. In another example, cavities are provided that contain air to create a buoyancy. For example, the mat material is heavier than water.

The term "support material" denotes a material which causes the web-like material to be lowered and which e.g. assumes a structural function in the final state. Instead of the term "carrier material", the terms "carrier material" or "filler material" or "lowering material" are also used.

According to one example, the sheet-like mat material is a concrete formwork covering with a large number of cavities for receiving the supporting material. The carrier material is provided as i) hardening mixture and / or ii) bulk material or bulk material.

The hardening mixture is, for example, a concrete material. The bulk material is, for example, sand, gravel or crushed stone. In another example, bentonite is used, for example with or without other materials as additive (s).

The term “concrete formwork covering” denotes a mat-like material which, like a quilt, has at least one intermediate space which can be filled with a filling material as a cavity. The cavity can have subdivisions to increase the stability. Concrete formwork casings are known as construction elements for building in water, e.g. for fastening dams. Two are connected to each other, e.g. interwoven fabric provided e.g. synthetic fabrics, which are used, for example, as formwork for the inserted concrete or mortar. When filled and set, the mat-shaped concrete formwork shell is, for example, of relatively uniform thickness. The concrete formwork envelope serves as lost formwork. In another example, two spaced-apart walls that delimit the cavity are connected to connection areas, e.g. by bulkheads or spacers made of tension elements and / or pressure elements. For example, two plastic geomembranes (KDB) are connected to each other in places as a concrete formwork covering in order to form cavities between them. For example, Incomat® mats from HUESKER Synthetic GmbH or Colcrete® concrete mats from Colcrete-von Essen GmbH & Co. KG are used as concrete formwork casings. Other products from other manufacturers can of course also be used.

The introduction device is, for example, a feed device for concrete.

According to one example, the dispensing device is designed to arrange a sheet-shaped sealing material below the sheet-like mat material.

According to one example, the dispensing device is designed to apply the sheet-like mat material and / or the sheet-like sealing material with lateral upturns on the water surface in such a way that a trough-shaped basin is formed with a peripheral edge, the edge above a surrounding water level of the channel to be sealed is arranged. In addition, a connection device is provided which is designed to form a connection between the trough-shaped basin and the surrounding water level.

The trough-shaped basin is also referred to as a trough-shaped receiving basin or sink basin.

The dispensing device has a holding device which is designed to hold the sheet-like mat material and possibly the sheet-like sealing material between two opposite bank areas of the channel. The sheet-like mat material and possibly the sheet-like sealing material lie on the water or are at least partially immersed in the water.

In one example, the holding device is designed to increase the held length of the sheet-like mat material and / or the sheet-like sealing material during the lowering, ie to loosen the holding points during the lowering, for example with cable winches, so that the material can slide into the channel cross section.
According to an example, at least one buoyancy element is provided which acts on the web-shaped mat material with a buoyancy force, the buoyancy force of the at least one buoyancy element being able to be reduced for the successive lowering.
According to one example, buoyancy cavities are provided in the sheet-like mat material, which are filled with air and which provide the buoyancy force. A valve device for venting the air is provided for the successive lowering.

In one example, some of the cavities for receiving the support material are filled with air instead of with support material.

For example, the buoyancy cavities are designed as air hoses. The air hoses can also be provided in addition to the cavities for receiving the support material.

For example, the buoyancy cavities are provided below the sheet-like mat material.

In one example, the sheet-like sealing material is formed with the buoyancy cavities. For example, a waterproofing membrane, e.g. a plastic sealing membrane (KDB), with integrated buoyancy cavities.

In another example, the sheet-like mat material and the sheet-like sealing material are formed with the buoyancy cavities.

In another example, the buoyancy cavities are provided as a separate structure below the sheet-like sealing material.

According to one example, a stabilizing device is provided in order to hold the web-shaped mat material at least in the flow direction during the lowering.

The stabilizing device is, for example, a profile running transversely to the direction of flow, on which an upstream edge of the sheet-like mat material is held. In one example, the stabilization device is provided to hold the sheet-like mat material in height during the lowering. The profile is held, for example, on the channel base or on the channel sides. The profile is, for example, kept movable in height. In one example, the profile is attached to an excavator which is provided on a pontoon floating in the channel in order to keep the profile variable in height and position during the lowering. According to the invention, a channel section is provided which has lateral and lower channel boundary surfaces, a water level and a channel sealing system according to the claims. For example, the water level is an operating water level. The term "service water level" refers to a water level as it occurs during normal operation, ie within the fluctuations usually encountered. In one example, the term “service water level” excludes, for example, water levels that occur as a result of service or repair work-related congestion or water drainage. In a further example, the term “service water level” includes those water level levels which are above a minimum water level defined for the sewer, that is to say also a brief increase in the water level as a result of operation or service work.

According to the invention, a channel section is also provided, which has lateral and lower channel boundary surfaces and a water level, and a channel sealing system according to one of the examples of a channel sealing system described above.

1. a) Ausbringen eines bahnenförmigen Mattenmaterials auf einem ersten Bereich der Wasseroberfläche des Kanals, so dass das bahnenförmige Mattenmaterial auf dem Wasserpegel schwimmend angeordnet ist oder wenigstens teilweise in das Wasser eingetaucht ist, wobei das bahnenförmige Mattenmaterial zwischen zwei sich gegenüberliegenden Uferbereichen des Kanals gehalten wird, wobei das bahnenförmige Mattenmaterial zur Aufnahme eines Tragmaterials wenigstens teilweise mit Hohlräumen ausgebildet ist;
2. b) Einbringen des Tragmaterials in wenigstens einen Teil der Hohlräume; und
3. c) sukzessives Absenken des bahnenförmigen Mattenmaterials bis zur Auflage auf einer Kanalgrundfläche.

In einem Beispiel wird als Tragmaterial ein Betonwerkstoff verwendet. Der Betonwerkstoff ist beispielsweise ein verzögert abbindender Beton. In einem Beispiel ist das bahnenförmige Mattenmaterial eine flexible Betonschalenhülle mit einer Vielzahl von Hohlräumen zur Aufnahme eines Betonwerkstoffs.
Gemäß einem Beispiel wird unterhalb des bahnenförmigen Mattenmaterials ein bahnenförmiges Dichtungsmaterial angeordnet. In einem Beispiel wird das bahnenförmige Dichtungsmaterial vor Schritt a) ausgebracht. In einem weiteren Beispiel wird das bahnenförmige Dichtungsmaterial in Schritt a) zusammen mit dem bahnenförmigen Mattenmaterial ausgebracht. Das bahnenförmige Dichtungsmaterial besteht beispielsweise aus mehreren Streifen eines Dichtungsmaterials, z.B. aus mehreren miteinander verbundenen Dichtungsbahnen. Das bahnenförmige Dichtungsmaterial wird beispielsweise mit dem bahnenförmigen Mattenmaterial verbunden, z.B. mit einem Doppelklebeband, mit Silikon, mit Schmelzstreifen oder mit Klettverschlusselementen. Die Verbindung erfolgt beispielsweise vor dem Ausbringen. In einem anderen Beispiel erfolgt die Verbindung während des Ausbringens. Die Verbindung kann auch nach dem Ausbringen erfolgen. Als bahnenförmiges Dichtungsmaterial wird ein Folien-/Bahnenmaterial verwendet, das gemäß einem Beispiel derart leichter ist als Wasser, dass es in der Lage ist, das bahnenförmige Mattenmaterial in ungefülltem Zustand zu tragen.According to the invention, a method for sealing a channel in the water-carrying state is provided with the following steps:

1. a) applying a sheet-like mat material on a first area of the water surface of the channel, so that the sheet-like mat material is arranged to float at the water level or is at least partially immersed in the water, the sheet-like mat material being held between two opposite bank areas of the channel, wherein the sheet-like mat material is at least partially formed with cavities for receiving a support material;
2. b) introducing the carrier material into at least part of the cavities; and
3. c) successively lowering the sheet-like mat material until it rests on a channel base.

In one example, a concrete material is used as the supporting material. The concrete material is, for example, a delay-setting concrete. In one example, the sheet-like mat material is a flexible concrete shell covering with a multiplicity of cavities for receiving a concrete material.
According to one example, a sheet-shaped sealing material is arranged below the sheet-like mat material. In one example, the sheet-like sealing material is applied before step a). In a further example, the sheet-like sealing material is applied together with the sheet-like mat material in step a). The sheet-like sealing material consists, for example, of a plurality of strips of a sealing material, for example of a plurality of sealing sheets connected to one another. The sheet-like sealing material is connected, for example, to the sheet-like mat material, for example with double-sided adhesive tape, with silicone, with melting strips or with Velcro fasteners. The connection takes place, for example, before the application. In another example, the connection is made during deployment. The connection can also be made after application. A film / sheet material is used as the sheet-like sealing material according to an example, is so lighter than water that it is able to carry the sheet-like mat material in an unfilled state.

According to one example, in step a) the sheet-like mat material and / or sheet-like sealing material which is arranged below the sheet-like mat material is applied with lateral upturns in such a way that a trough-shaped basin with a peripheral edge and a base area is formed. The edge is arranged above a surrounding water level of the channel to be sealed. After step b), a connection is formed between the trough-shaped basin and the surrounding water level.

The lateral upturns are so large that the trough-shaped basin generates sufficient buoyancy to support the sheet-like mat material with the carrier material introduced.

In one example, two opposite edges of the sheet-like mat material and / or the sheet-like sealing material lie on side slope areas above the water level, e.g. on the crown of the perineum, and the end faces are folded up so that the pelvis is formed. The term "end faces" here refers, for example, to the connections (connection edges) between the opposite bank areas, and does not refer to a possible narrow shape.

By establishing the connection, for example, water runs into the area of the basin and thus causes the lowering. In one example, a foldable or depressible edge segment is provided as the connection.

The connection between the pool and the surrounding water level is, for example, in addition to lowering the edge, alternatively or additionally also by the principle of a communicating tube with a pipe connection.

For example, the supporting material can only be introduced before the lowering takes place, e.g. through the aforementioned flooding of the tub-shaped basin.

In another example, the introduction of the support material and the successive lowering take place simultaneously, e.g. also by more or less simultaneous flooding of the trough-shaped basin.

According to one example, in step b), support material is introduced into the web-shaped mat material in a central region, the central region being provided as a channel sole cover. After step c), lateral areas of the sheet-like mat material are filled with the carrier material, the lateral areas abutting or coming to rest on the lateral embankment areas.

According to an example, it is provided that steps a) to c) are repeated, with the repetition in step a) applying the sheet-like mat material to a second region of the water surface of the channel, and lowering in step c) in such a way that that a full-surface channel seal is gradually created.

For example, adjacent segments are arranged in an overlapping manner. For this, e.g. Overlap segments formed on the sheet-like mat material and / or the sheet-like sealing material.

In one example, the joints on the end faces are poured with concrete after or during lowering.

According to the invention, the use of a system according to one of the examples described above for sealing a channel is also provided.

In a further example, a sheet-like channel seal, for example a plastic sealing sheet (KDB), is laid and welded from a dam crown over a floating pontoon to the opposite dam crown. Then, for example, an Incomat® mat (or another product) is laid over the duct sealing membrane and connected to the KDB. This process is repeated, for example, until a manageable length of 30 to 50 meters is completed. The system is temporarily secured on the dam crowns. After the completion of a section, the end faces are folded up, so that a system closed in the form of a tub is created with respect to the surrounding water. In a next step, the Incomat® mat is filled with concrete in the base area, ie in the area above the channel base surface. The trough-shaped basin is then flooded. As soon as the end faces are overflowed, the sealing system can sink to the ground due to gravity. The mentioned securing, which is designed to be adjustable, is loosened during the lowering process, for example by means of cable winches, so that the required additional requirement for sealing membranes or the required additional length can "slide down" from the dam crowns due to the development of the channel profile. The longitudinal fuses are loosened in a controlled manner in order to achieve an even lowering. After the Incomat® mat has come to rest in the bottom area, you can start filling the embankment areas of the Incomat® mat. This can be done in several steps, for example. The joints on the end faces of the individually lowered units are, for example, overlapping and can be poured with concrete so that a full-surface channel seal is created.

According to the invention, it is provided as an advantage that water can continue to be drained off in the sewer during the lowering process, since it is not necessary to create a “shut-off dam”, as is required, for example, when draining a sewer. In the case of waterways, it may be necessary to interrupt any existing ship operations, at least briefly, in order to apply and lower the sealing sheets. In the event of unforeseen events, the lowering process can be stopped at any time since the sealing system is arranged more or less parallel to the direction of flow. For example, this also allows sudden draining of large amounts of water when operating a power plant. The water can then flow above and below the sealing system. By combining the channel sealing membrane with a concrete formwork covering, e.g. an Incomat® mat, a double seal is provided, whereby each element fulfills the required sealing properties. If, for example, one of the two elements fails, the other element can take over the sealing function. As already mentioned, it is provided in one example that the channel sealing membrane takes over the function of a basic girder and serves as lost formwork.

In the invention, a sewer sealing system is provided for sealing a sewer in a water-carrying state, a dispensing device and an introducing device being provided. The application device is designed to apply a web-shaped flexible concrete formwork casing with a plurality of cavities for receiving a concrete material on a first area of the water surface of a channel. The dispensing device has a holding device which is designed to hold at least the concrete formwork casing between two opposite bank areas of the channel, the concrete formwork casing being partially immersed in the water. The introduction device is designed to introduce a concrete material into at least some of the cavities in a central region of the concrete formwork cover for a successive lowering of the concrete formwork cover until it rests on one Canal base area, the central region being provided as a channel sole cover. The introduction device is designed to introduce the concrete material into at least some of the cavities in lateral areas of the concrete formwork envelope, the lateral areas abutting lateral slope areas of the channel.

The provision of a flexible concrete formwork casing serves on the one hand to provide a seal which can first be spread out on the water surface or can be provided there. The concrete material, which is placed in the cavities of the concrete formwork cover, on the one hand achieves the lowering of the seal on the surfaces to be sealed. On the other hand, the concrete material also serves to secure the seal securely and permanently. The use of concrete has the advantage that first of all a liquid or viscous, i.e. flexible material is made available which, on the one hand, is easy to handle, e.g. for insertion, and also adapts to different shapes, for example during lowering. The use of concrete also has the advantage on the base or on the side embankment surfaces that "nestling" to the existing surface structures or surface profiling takes place here, so that the seal lies as close as possible to the surfaces to be sealed. After adapting to the surface, the concrete can set and harden to ensure a reliable hold. In addition, the concrete offers further protection for the underlying areas of the waterproofing.

In one example, the dispensing device is designed to arrange a sheet-like sealing material below the concrete formwork casing.

In one example, the dispensing device is designed to apply the concrete formwork casing and / or the sheet-like sealing material with lateral upturns on the water surface in such a way that a trough-shaped pool is formed with a peripheral edge, the edge above a surrounding one Water level of the channel to be sealed is arranged. In addition, a connection device is provided which is designed to form a connection between the trough-shaped basin and the surrounding water level.

In one example, at least one buoyancy element is provided in the form of a buoyancy cavity, the buoyancy cavity being filled with air and providing a buoyancy force which temporarily acts on the concrete formwork casing. A valve device for releasing the air is provided for the successive lowering in order to reduce the lifting force.

In one example, a stabilizing device is provided in order to hold the concrete formwork casing at least in the direction of flow during the lowering.

1. a) Ausbringen einer Betonschalungshülle auf einem ersten Bereich der Wasseroberfläche des Kanals, wobei die Betonschalungshülle wenigstens teilweise mit Hohlräumen zur Aufnahme eines Betonmaterials ausgebildet ist;
2. b) Einbringen von Betonmaterial in wenigstens einen Teil der Hohlräume in einem mittleren Bereich der Betonschalungshülle, wobei der mittlere Bereich als Kanalsohlenabdeckung vorgesehen ist;
3. c) sukzessives Absenken der Betonschalungshülle bis zur Auflage auf einer Kanalgrundfläche; und
4. d) Einbringen des Betonmaterials in seitliche Bereiche der Betonschalungshülle, die an seitlichen Böschungsbereichen des Kanals anliegen.

In one example, a method for sealing a channel in a water-carrying state is provided with the following steps:

1. a) spreading a concrete formwork covering on a first region of the water surface of the channel, the concrete formwork covering being at least partially formed with cavities for receiving a concrete material;
2. b) introducing concrete material into at least some of the cavities in a central region of the concrete formwork envelope, the central region being provided as a channel sole cover;
3. c) successively lowering the concrete formwork envelope until it rests on a channel base; and
4. d) Introducing the concrete material into the lateral areas of the concrete formwork envelope which lie against the lateral slope areas of the channel.

In one example, steps a) to d) are repeated, and in the repetition in step a), the concrete formwork covering is thus placed on a second area of the Water surface of the channel is applied, and in step c) the lowering is carried out in such a way that a full-surface channel seal is gradually created.
According to one aspect of the invention, a web material provided as a seal is first applied to the water surface of a water-carrying channel. In order to bring the sealing material to the channel boundary surfaces to be sealed, a weighting material is provided which, due to its weight, causes a lowering, so that the sealing surfaces lie against the surfaces to be sealed. For this purpose, the weighting material is filled into specially provided recordings. In addition to lowering, the weighting material used also serves to hold the sealing segments securely on the respective surfaces to be sealed. For example, a concrete material is provided for this purpose, which is initially in a liquid or viscous, that is to say flexible, state and causes the lowering. In the lowered position under water, the viscous material will first adapt to an existing surface structure or profile, in order to press the sealing membrane over the entire surface of the surfaces to be sealed. The concrete material can then harden to ensure an even better hold on the sealing membrane. In the combination of a sealing sheet with additional sheet-shaped sleeves for receiving the support material mentioned as an example, the sealing sheet together with the sleeves serves as redundant seals, ie an additional sealing protection is provided. In addition, the waterproofing membrane lying on the water can also be used as a kind of working platform for spreading the support material.

Fig. 1

einen schematischen Querschnitt durch ein Beispiel eines Kanalabdichtungssystems zum Abdichten eines Kanals in wasserführendem Zustand;

Fig. 2

ein Beispiel einer Betonschalungshülle in einer perspektivischen Ansicht;

Fig. 3

ein Beispiel eines bahnenförmigen Mattenmaterials in Kombination mit einem bahnenförmigen Dichtungsmaterial in einem schematischen Querschnitt durch ein Kanalabdichtungssystem in einem Ausschnitt;

Fig. 4

eine isometrische Schnittansicht in einem Längsschnitt durch ein Kanalabdichtungssystem mit seitlichen Aufkantungen;

Fig. 5

ein Beispiel eines Kanalabdichtungssystems mit einer Haltevorrichtung;

Fig. 6

einen schematischen Schnitt durch ein Kanalabdichtungssystem in einem Ausschnitt;

Fig. 7

ein Beispiel eines bahnenförmigen Mattenmaterials mit Auftriebshohlräumen in einem Querschnitt in Fig. 7A und einem Längsschnitt in Fig. 7B;

Fig. 8

ein Beispiel eines Kanalabdichtungssystems in einem Längsschnitt mit einer Stabilisierungsvorrichtung;

Fig. 9

ein Beispiel eines Kanalabschnitts in einem Querschnitt;

Fig. 10

ein Beispiel eines Verfahrens zum Abdichten eines Kanals in wasserführendem Zustand;

Fig. 11

ein weiteres Beispiel eines Verfahrens zum Abdichten eines Kanal im wasserführendem Zustand; und

Fig. 12

ein weiteres Beispiel für eine Abdichtung eines Kanals in einem ersten Schritt in einem Längsschnitt in Fig. 12A, in verschiedenen Zwischenschritten im Querschnitt in Fig. 12B, 12C, 12D und 12E, sowie in einem Endzustand in Fig. 12F.

In the following, exemplary embodiments of the invention are discussed in more detail with reference to the accompanying drawings. Show it:

Fig. 1

a schematic cross section through an example of a channel sealing system for sealing a channel in the water-carrying state;

Fig. 2

an example of a concrete formwork shell in a perspective view;

Fig. 3

an example of a sheet-like mat material in combination with a sheet-shaped sealing material in a schematic cross section through a channel sealing system in a section;

Fig. 4

an isometric sectional view in a longitudinal section through a channel sealing system with side upstands;

Fig. 5

an example of a channel sealing system with a holding device;

Fig. 6

a schematic section through a channel sealing system in a section;

Fig. 7

an example of a sheet-like mat material with buoyancy cavities in a cross section in Figure 7A and a longitudinal section in Figure 7B ;

Fig. 8

an example of a channel sealing system in a longitudinal section with a stabilizing device;

Fig. 9

an example of a channel section in a cross section;

Fig. 10

an example of a method for sealing a channel in the water-carrying state;

Fig. 11

another example of a method for sealing a channel in the water-carrying state; and

Fig. 12

another example of sealing a channel in a first step in a longitudinal section in Figure 12A , in various intermediate steps in cross section in Figures 12B, 12C, 12D and 12E , as well as in a final state in Figure 12F .

Fig. 1 shows a channel sealing system 10 for sealing a channel 12. The channel 12 has, for example, an area filled with water, the upper edge of which is designated by reference number 14. The channel, like the water surface 14, is shown with a dashed line, since these are not more immediate components of the system. The channel sealing system also has a delivery device 16 and a delivery device 18. The application device 16 is designed to apply a sheet-like mat material 20 to a first region of a water surface of a channel. The web-shaped mat material 20 is at least partially formed with cavities 22 in order to accommodate this carrier material. The introduction device 18 is designed to introduce the carrier material 24 into at least some of the cavities, and thus to bring about a gradual lowering of the sheet-like mat material 20 until it rests on a channel base. The lowering is indicated by a lowering arrow 28. In addition to the channel base surface 26, the channel 12 is also formed with two slope slopes 30 on which the sheet-like mat material 20 also rests when it is lowered.

Fig. 2 shows an example of the sheet-like mat material 20, in which a concrete formwork cover 32 is provided with a plurality of cavities 34 for receiving the support material. For example, a hardening mixture or a bulk material or bulk material is provided as the carrier material. The hardening mixture is, for example, a concrete material 36. For example, the cavities 34 are separated from one another by partitions 38 or quilting seams.

In Fig. 3 An example is shown in which a sheet-shaped sealing material 40 is provided below the sheet-like mat material 20. For example, the dispensing device 16 is designed to arrange the web-shaped sealing material 40 below the web-shaped mat material 20 (not shown in more detail).

As in Fig. 4 it is shown, in one example, that the dispensing device 16 (not shown) is designed to dispense the sheet-like mat material 20 and / or the sheet-like sealing material 40 with lateral upturns 42 on the water surface 14 in such a way that a trough-shaped basin 44 coexists forms a circumferential edge 46, the edge being arranged above a surrounding water level 48 of the channel 14 to be sealed. In addition, a connection device 50 is indicated, which is provided to form a connection between the trough-shaped pool 44 and the surrounding water level 48.

The sheet-like mat material 20 rests, for example, on dam crown areas 33 provided on the side of the channel. In Fig. 4 a first hatching 31 indicates the channel boundary surfaces, for example adjacent soil or a concrete support structure in the form of a trough; a second hatching 29 indicates the water level or the amount of water within the channel.

In another example, in Fig. 5 shown, the dispensing device 16 has a holding device 52 which is designed to hold the sheet-like mat material 20 and / or also the sheet-like sealing material 40 between two opposite bank areas, for example in dam crown areas 33 of the channel 12. The sheet-like mat material 20 and / or the sheet-like sealing material 40 lie on the water 14 or are at least partially let into the water. The water is identified by reference number 54. In Fig. 5 is the solid line 56 of the Initial state shown, in which the material rests on the water, and with a dashed line 58 the final state when the sheet-like mat material is lowered onto the channel base.

For example, the holding device 52 has two reeling devices 60 arranged on the dam crown areas in order to unroll further web material from a reel 62 during the lowering, as indicated by reference number 64. This makes it possible to increase the length of the sheet-like mat material 20 and / or the sheet-like sealing material 40 during the lowering, so that the material can slide into the channel cross-section.

In Fig. 6 An exemplary embodiment is shown in which at least one buoyancy element 70 is provided, which acts on the web-shaped mat material 20 with a buoyancy force 72, the buoyancy force of the at least one buoyancy element being able to be reduced for successive lowering, for example lowering 28.

According to another example, buoyancy cavities 74 are provided in the sheet-like mat material which are filled with air and provide the buoyancy force, as shown in FIG Figure 7A in a cross section through the sheet-like mat material 20 and in a partial longitudinal section in FIG Figure 7B is shown. A valve device 76 for venting the air is provided, for example, for the successive lowering. For example, the buoyancy cavities 74 are designed as air hoses 78.

In Fig. 8 an example is shown in a longitudinal section, in which the channel sealing system 10 is provided with a stabilizing device 80 in order to hold the web-shaped mat material 20 during the lowering 28 at least in one flow direction 82. For example, the stabilization device 80 is a profile running transversely to the direction of flow an upstream edge of the sheet-like mat material 20 is held, which is indicated by a holding line 83. The stabilizing device 80 can, for example, be kept movable in height, which is indicated by a double arrow 84. This makes it possible to temporarily hold the sheet-like mat material 20 in the correct place even with larger flow rates, that is to say higher or higher flow speeds, for example with lateral upturns and a trough-shaped basin 44, and to ensure reliable hold even during the lowering process, or to be able to control the position when placing or lowering.

Fig. 9 shows a channel section 100 with lateral channel boundary surfaces 102 and lower channel boundary surface 104. In addition, for example, lateral embankment regions in the form of dam crown regions 106 or other edge regions are provided. In addition, a water level 108 is provided, as well as a sheet-like mat material 110. The sheet-like mat material 110 is, for example, the sheet-like mat material 20, which has already been described with reference to the preceding figures. The sheet-like mat material 110 is provided for sealing at least partial areas of the channel boundary surfaces and is at least partially designed with cavities 112 for receiving a support material 114 for a successive lowering 116 of the sheet-like mat material 110 until it rests on a channel base surface, for example the lower channel boundary surface 104 the sheet-like mat material 110 is arranged to float at the water level 108.

In a further exemplary embodiment, not shown, a channel section is provided, with lateral and lower channel boundary surfaces and a water level. In addition, a channel sealing system is provided according to one of the previously described examples of the channel sealing system 10. Fig. 10 shows an example of a method 200 for sealing a channel in a water-carrying state, in which the following steps are provided: In a first step 210, a sheet-like mat material is applied to a first region of the water surface of the channel, the sheet-like mat material being used to receive a Support material is at least partially formed with cavities. In a second step 212, the carrier material is introduced into at least some of the cavities. In a third step 214, a successive lowering of the sheet-like mat material is provided until it rests on a channel base. The first step 210 is also referred to as step a), the second step 212 as step b) and the third step 214 as step c).

For example, a concrete material is used as the supporting material, and a flexible concrete formwork covering with a large number of cavities for receiving the concrete material is used as the sheet-like mat material.

In a further embodiment (not shown), a sheet-shaped sealing material is arranged below the sheet-like mat material.

For example, in step a) it is provided that the sheet-like mat material and / or sheet-like sealing material, which is arranged below the sheet-like mat material, is applied with lateral upturns in such a way that a trough-shaped basin with a circumferential edge and a base area is formed, the edge is arranged above a surrounding water level of the channel to be sealed. After step b), a connection is formed between the trough-shaped pool and the surrounding water level in order to carry out the lowering process.

According to a further example (not shown) it is provided that in step b) support material is placed in the web-shaped mat material in a central region is introduced, the central region being provided as a channel sole cover. After step c), lateral areas of the sheet-like mat material which are in contact with lateral embankment areas are filled with the carrier material.

In a further example, steps a) to c) are repeated, which is indicated in Fig. 10 is indicated by a dashed arrow 215. The repetition is in Fig. 10 shown as a possible option and is not to be understood as a mandatory feature of the examples described above. In the repetition, it is provided that in step a) the sheet-like mat material is applied to a second area of the water surface of the channel, and in step c) the lowering is carried out in such a way that a full-surface channel seal is gradually produced.

In Fig. 11 A further example of the method 200 is shown, in which a first step 210 ′ is provided, in which a concrete formwork casing is applied to a first region of the water surface of the channel, the concrete formwork casing being at least partially formed with cavities for receiving a concrete material. In a second step 212 ', concrete material is introduced into at least some of the cavities in a central region of the concrete formwork envelope, the central region being provided as a channel sole cover. In a third step 214 ', the concrete formwork covering is successively lowered, with it resting on a channel base area. In a fourth step 216, the concrete material is introduced into lateral areas of the concrete formwork casing which bear against lateral slope areas of the channel. The first step 210 'is also referred to as step a), the second step 212' as step b), the third step 214 'as step c) and the fourth step 216 as step d).

In another example, it is provided as an option that steps a) to d) are repeated, which is indicated by a dashed arrow 217. In the Repetition is carried out in step a) of the concrete formwork covering in such a way on a second area of the water surface of the channel, and in step c) the lowering is carried out in such a way that a full-surface channel seal is gradually produced.

In the following, another example for sealing a channel in a water-bearing state will be explained on the basis of various states.

In Figure 12A a channel region 310 is shown in a longitudinal section, in which a water level 312 is provided. A channel bottom is indicated by a line 314. In the upper region of the water level 312, a channel sealing system is provided with a sheet-like mat material 316, which rests on a sheet-like sealing material 318. The sheet-like sealing material 318 is, for example, a plastic sealing sheet (KDB) and has lateral upturns 320 in order to form a kind of trough-shaped basin 321.

In Figure 12B the situation is over Figure 12A shown in a cross section. The sheet-like sealing material 318, for example the KDB, is pulled up laterally on the bank areas. As already in Figure 12A indicated, the sheet-like mat material 316 has cavities 322, which are filled with concrete in a central area 324, for example, and which are unfilled in lateral areas 325. The middle area 324 is located above the channel base 314, for example, and the lateral, unfilled areas 325 are located above the side embankment areas 326. The plastic sealing sheet or the sheet-like sealing material 318 can, for example, be placed on dam crown areas 328 to provide a necessary length which is required during the lowering process.

In Figure 12C A state is shown in which the trough region or the trough-shaped basin 321 is flooded with water, causing a lowering 330 is effected. Since the concrete in the cavities 322 is still liquid or viscous, the sheet-like mat material 316 is sagged together with the sheet-like sealing material 318, for example in the form of a parabola, as shown in FIG Figure 12C is indicated.

A lowering onto the channel sole 314 then takes place by gravity, as shown in FIG Figure 12D is indicated.

As in Figure 12E shown, the lateral areas 325 are then filled, for example from the land. Individual areas can also be filled separately, as indicated by reference number 332.

In Figure 12F In a final state 334 it is shown that a continuous seal is provided by the filled-in side slope areas 332 and the filled areas 322 in the area of the channel base 314.

The steps described are then repeated, for example offset in the longitudinal direction of the channel, in order to continuously expand the seal in the direction of the channel. If the seal is not applied over its entire width in one operation, it is repeated, also offset in the direction of the channel cross-section.

The exemplary embodiments described above can be combined in different ways. In particular, aspects of the method can also be used for embodiments of the devices and use of the devices and vice versa.

In addition, it should be pointed out that "comprehensive" does not exclude other elements or steps and "one" or "an" does not exclude a large number. It should also be noted that features or steps that refer to one of the The above exemplary embodiments and aspects have been described, can also be used in combination with other features or steps of other exemplary embodiments and aspects described above. Reference signs in the claims are not to be viewed as a restriction.

Claims (14)

1. Canal sealing system (10) for sealing a canal (12) in a water-bearing state, comprising:

   - a discharging device (16);

   - a sheet-like mat material (20),

   - a support material (24) and

   - an insertion device (18);

   wherein the discharging device (16) is configured to discharge the sheet-like mat material (20) on a first portion of a water surface of a canal so that the sheet-like mat material (20) is floating on the water level; wherein the sheet-like mat material (20) is at least partially formed with cavities (22) for receiving the support material (24);
   wherein the insertion device (18) is configured to insert the support material (24) into at least a part of the cavities (22) for successively lowering the sheet-like mat material (20) until it rests on a canal base surface (26); characterized in that
   the discharging device comprises a holding device (52) configured to hold the sheet-like mat material (20) between two opposite bank portions of the canal; wherein the sheet-like mat material (20) rests on the water or is at least partially immersed in the water.
2. The canal sealing system according to claim 1, wherein the sheet-like mat material is a concrete formwork shell (32) having a plurality of cavities (34) for receiving the support material, and wherein the support material is provided as a supporting material:

   i) curing mixture; and/or

   (ii) bulk material.
3. The canal sealing system according to claim 1 or 2, wherein the discharging device is configured to dispose a sheet-like sealing material (40) beneath the sheet-like mat material.
4. The canal sealing system according to claim 3, wherein the holding device (52) is configured to hold the sheet-like sealing material between two opposite bank portions of the canal; wherein the sheet-like sealing material rests on the water or is at least partially immersed in the water.
5. The canal sealing system according to any of the preceding claims, wherein the discharging device is configured to discharge the sheet-like mat material and/or the sheet-like sealing material with such lateral upstands (42) on the water surface to form a trough-shaped basin (44) having a circumferential edge (46), the edge being disposed above a surrounding water level (48) of the canal to be sealed; and
   wherein a connecting device (50) is provided, which is configured to form a connection between the trough-shaped basin and the surrounding water level.
6. The canal sealing system according to one of the preceding claims, wherein at least one buoyancy element (70) is provided, which acts with a buoyancy force (72) on the sheet-like mat material; wherein the buoyancy force of the at least one buoyancy element can be reduced for successive lowering.
7. The canal sealing system according to claim 6, wherein buoyancy cavities (74) are provided in the sheet-like mat material, which are filled with air and provide the buoyancy force; and
   wherein a valve device (76) for discharging the air is provided for the successive lowering
8. The canal sealing system according to any of the preceding claims, wherein a stabilizing device (80) is provided to hold the sheet-like mat material at least in the direction of flow during the lowering.
9. A canal section (100) comprising:

   - lateral (102) and lower (104) canal boundary surfaces;

   - a water level (108); and

   - a canal sealing system according to any of claims 1 to 8.
10. Method (200) for sealing a canal in a water-bearing state with a canal sealing system according to any of claims 1-8, comprising the following steps:

    a) discharging (210) the sheet-like mat material on a first portion of the water surface of the canal so that the sheet-like mat material rests on the water level or at least partially immersed in the water; wherein the sheet-like mat material is held between two opposite bank areas of the canal;
    wherein the sheet-like mat material is at least partially formed with cavities for receiving a support material;

    b) inserting (212) the support material into at least a portion of the cavities; and

    c) successive lowering (214) of the sheet-like mat material until it rests on a canal base surface.
11. The method according to claim 10, wherein in step a) the sheet-like mat material and/or a sheet-like sealing material, which is arranged below the sheet-like mat material, is/are discharged with lateral upstands in such a way that a trough-shaped basin with a circumferential edge and a base surface is formed, wherein the edge is disposed above a surrounding water level of the lowered mat material.
12. The method according to one of claims 10 or 11, wherein in step b) a supporting material is introduced into the sheet-like mat material in a central portion, the central portion being provided as a canal bottom cover; and
    wherein after step c) lateral portions of the sheet-like mat material are filled with the supporting material, which lie against lateral slope portions.
13. The method according to any of claims 10 to 12, wherein steps a) to c) are repeated; and
    wherein in the repetition in step a) the sheet-like mat material is discharged in such a way on a second portion of the water surface of the canal, and in step c) the lowering happens in such a way that a full-surface canal sealing is successively created.
14. Use of a system according to any of claims 1 to 8 for sealing a canal.

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