EP2499304A1

EP2499304A1 - Device for sealing a penetration associated with a penetrating element in a sealing sheet

Info

Publication number: EP2499304A1
Application number: EP10779516A
Authority: EP
Inventors: Ulrich K. Weber
Original assignee: Sika Technology AG
Current assignee: Sika Technology AG
Priority date: 2009-11-12
Filing date: 2010-11-09
Publication date: 2012-09-19
Also published as: WO2011057996A1; EP2322722A1

Abstract

The invention relates to a device (1) for sealing a separating layer (2) applied to a substrate (2) in the area of construction, in particular in the area of marine construction. The device comprises at least one penetrating element (4) penetrating the separating layer. The device further comprises an anchor element (5) that can be connected to the substrate and in which a section (6) of the penetrating element (4) can be received. The device further comprises a fastening plate (7) by means of which the separating layer can be connected to the anchor element using the penetrating element (4), wherein the fastening plate comprises a cross section designed such that said plate forms an intermediate space (8) in contact with the separating layer, enclosing the penetration site (9) of the penetrating element through the separating layer. The fastening plate further comprises a sealing device (16) for the intermediate space.

Description

Device for sealing a breakthrough associated with a breakthrough element in a geomembrane

Technical background

The present invention relates to a device for sealing a breakthrough element associated breakthrough in a geomembrane in the construction sector.

Technical area

Although applicable to any field of construction, the present

Invention and the problem underlying it, explained in more detail below with reference to a channel wall in the aquatic environment.

When building a concrete structure in the water, the building wall is initially covered on the inside typically with a geomembrane to a

Prevent penetration of water into the subsurface. This is particularly important if there are cavities in the subsurface, which are located below the waterline of the channel, as is the case for example in underground garages or basements of buildings close to the canal. Typically, there is a shell next to the building wall, to which the water connects. To a stable anchoring of the shell with the channel provided with the sealing membrane to

ensure that a tension- and shear-resistant anchor system is inserted into the channel wall. The introduction of such an anchor system has the consequence that the geomembrane at several points from that of the

Canal wall protruding outward and in this fortified

Connecting elements of the anchor system is broken. The openings provided in the geomembrane must now be reliably sealed again, to prevent ingress of the water, which Shell has to penetrate, by the geomembrane itself to prevent.

One of the applicant internally known device for sealing such breakthroughs has a mounting plate which rests on the side facing away from the armature system of the geomembrane on the geomembrane and thus comes to rest over the opening in the geomembrane and this closes. Between the contact point of mounting plate and

Geomembrane can additionally be attached a sealing ring. The problem with the approach described is that the met

Measures are not completely sufficient to ensure a particularly long-term tightness, as required in sewer construction. On the one hand, the material of the mentioned sealing ring can tire with time and on the other hand, the water can succeed after some time, between the mounting plate and the geomembrane, or between the

Mounting plate and the sealing ring, or penetrate between the sealing ring and the sealing membrane for breakthrough and thus the

To pass sealing layer, especially at a relatively high

Water pressure. This is undesirable because over time this can lead to corrosion of the anchors and, moreover, the water is able to penetrate cavities in the subsurface.

DESCRIPTION OF THE INVENTION An object of the present invention is to provide a device for the

Sealing an anchor associated breakthrough in a

To improve geomembrane to the effect that a tightness over a longer period and / or at a higher water pressure is ensured. This object is achieved by a device with the

Characteristics of claim 1 solved. Accordingly, a device 1 for sealing a on a

Subsurface 3 attached Schott layer 2 in the construction sector, especially in the aquatic area, provided.

Such a device is shown for example in Figures 1 to 5b.

The device has at least one penetrating element 4, which penetrates the Schott layer.

Furthermore, the device has an anchor element 5, which is connectable to the substrate and in which a portion 6 of the penetrating element 4 can be accommodated.

Furthermore, the device has a mounting plate 7, via which, by means of the penetrating element, the Schott layer is connectable to the anchor element, wherein the mounting plate has a cross section which is designed such that it forms a gap 8 in contact with the Schott layer, which forms the Penetration point 9 of

Penetration element through the Schott layer comprises.

The mounting plate further includes a sealing device 16 for the gap.

The idea underlying the present invention is that the penetration point 9 can be closed fluid-tight due to the sealing device 16. Is the sealing device one?

Connecting portion 10, in particular around an injection valve, the penetration point can be fluid-tightly closed by an injection material 14, which can pass through the connecting portion to the penetration point. As a result, the central passage point is closed directly by the Schott layer. In addition, the injection material may close further openings, through which water could reach the penetration point, for example, openings between Penetration element and mounting plate or mounting plate and Schott layer.

If the sealing device is a water-swelling body 18, then possible openings through which water to

Durchdringungsstelle could penetrate, for example, openings between the penetrating element and mounting plate or mounting plate and bulkhead layer, closed by the swelling material and the central passage point protected by the Schott layer from penetrating water.

Consequently, an increased tightness is achieved by means of the device over the prior art. Further aspects of the invention are the subject of further independent claims. Particularly preferred embodiments of the invention are the subject of the dependent claims.

Short description of the drawing

In the following, embodiments of the invention will be explained in more detail with reference to the drawings. The same elements are provided in the various figures with the same reference numerals. The flow direction of the media is indicated by arrows. Show it:

1 shows a cross section through a Schott layer with an inventive device.

2 shows a cross section through a Schott layer sealed with a further device according to the invention.

Fig. 3 shows a cross section through a Schott layer sealed with a further inventive device. 4 shows a cross section through a Schott layer sealed with a further device according to the invention. Fig. 5a and Fig. 5b shows a cross section through a building comprising a Schott layer sealed with a

inventive device.

Only the elements essential for the immediate understanding of the invention are shown.

Ways to carry out the invention

FIG. 1 shows a device according to the invention and shows a device 1 for sealing a bulkhead layer 2 attached to a substrate 3 in the construction sector, in particular in the construction sector

Gewässerbaubereich. The device has at least one

Penetration element 4, which penetrates the Schott layer, on.

Next, the device has an anchor element 5, which is connectable to the ground and in which a section 6 of the

Penetrating element 4 is accommodated on. Furthermore, the device has a mounting plate 7, via which, by means of

Penetration element 4, the Schott layer with the anchor element

is connectable, wherein the mounting plate has a cross section which is designed such that it forms a gap 8 in contact with the Schott layer, which the penetration point 9 of

Penetration element through the Schott layer comprises. The

Mounting plate further includes a sealing device 16 for the

Gap on. Preferably, the penetrating element 4 is a tensioning means. Preferably, the penetrating element is a screw.

Typically, the penetrating element serves as a support or anchoring element for a building material 17 to the mounting plate. 7 facing side of the Schott layer, which can be attached to the mounting plate 7 facing side of the Schott layer. The

Penetration element may be the primary support or anchoring element for a building material or mainly to ensure the bond with the mounting plate, which in turn is then the primary support or anchoring element, typically due to support members 15 which on the side facing away from the anchor member 1 1 of

Mounting plate are arranged.

Furthermore, the penetrating element has a section 6, which can be received by the anchor element 5. It is about

for example, a thread in the anchor element, which is the

Can take penetrating element.

Preferably, the Schott layer is due to the

Penetrating element 4 between anchor element and mounting plate clamped. If the penetrating element is one

Screw can be clamped due to the penetration element, for example by tightening via a thread in the anchor element, the Schott layer 4 between anchor element and mounting plate. This is

to the effect that thereby the desired pressure of the

Fixing plate can be adjusted to the Schott layer.

The mounting plate 7 is preferably circular. This is a uniformly distributed contact pressure to the

Penetration point 9 reached. Furthermore, the attachment plate preferably consists of a

Material which is sufficiently stiff to withstand the forces during sealing of the Schott layer 4, in particular during clamping between anchor element and mounting plate by a screw. Preferably, the mounting plate is made of a metal, in particular of steel, particularly preferably stainless steel. The mounting plate has a sealing device 16 for the gap.

The sealing device 16 may be a

Connecting portion 10, in particular to an injection valve, act, as shown in Figure 1. The connecting portion 10 serves for

Introducing injection material 14 in the gap 8 between

Fixing plate and Schott layer, in particular to Durchdringungsstelle 9. As a result, the penetration point 9 can be closed fluid-tight.

This is to the advantage that the injection material after attaching the mounting plate, in particular the clamping of the Schott layer 4 between anchor element and mounting plate, can be introduced into the intermediate space. In addition to the gap 8 existing openings, such as openings between the penetrating element and mounting plate, mounting plate and Schott layer and in particular the penetration point 9, thus closed fluid-tight. Furthermore, if the injection material is an expanding material, a back pressure is built up which, on the one hand, efficiently fills existing openings and improves the sealing effect of the fastening plate.

Preferably, an injection valve is a valve that allows the flow of injection material toward the gap, but prevents flow in the opposite direction.

Preferably, the mounting plate further comprises a vent valve 19 through which air present in the intermediate space or gases emerging during curing of the injection material can escape.

It is also advantageous if the injection material after the

Introducing into the intermediate space 8, the penetration point 9 closes fluid-tight. It is also advantageous if the injection material hardens after introduction into the intermediate space 8 and thereby expands and / or is water-swelling in the hardened state. The injection material is preferably selected from the list consisting of polyurethane, epoxy resin, acrylates and mineral

Binder.

The mineral binders are typically cement-based binders. It may be particularly advantageous to combine injection materials, also referred to below as sealants, with each other. Some of these sealants have an independent spectrum of properties. A first group form the non-positive

Sealant, a second group form the expandable sealant and a third group form the water-swellable sealant.

In the first group of non-positive sealant will be

Epoxy resins and cementitious sealants counted. The second group of expandable sealants includes the polyurethanes and the third group of swellable sealants include the polyacrylates.

Organic materials as sealants such as polyurethane or

Polyacrylate can be very variable in contrast to the cementitious sealant by means of accelerating substances in the setting

Reaction behavior ranging from a few seconds to several hours and can accommodate by their flexible properties movements within the filler to a limited extent harmless.

Water-based systems, such as conventional acrylate systems or special hydrophilic polyurethanes (polyurethane gels) are advantageous because of their swelling behavior.

It may also be advantageous to mix cementitious materials as sealants in the unbonded state with plastic dispersions in order to positively influence the flowability, solidification and processing properties of the still flowable sealant.

Swelling and / or stretchable sealants are advantageous in that they are able to seal reliably after they have penetrated into small joints and / or cracks. Preferably, the sealants show no shrinkage effect during setting.

It is also advantageous if the sealant is water-swellable

Contains materials. The term "water-swellable materials" is used in the This document is understood to mean materials which upon contact with water increase their volume to a multiple, typically between 200-1000% of the original volume. In addition to

Volume increase, certain water-swellable materials can also chemically react with water. Examples of such water-swellable

Materials are polyurethane-based bulking agents, in particular

silane-modified polymers that cure by moisture to form an elastic product. Another example of such swelling agents are bentonite-butyl rubbers.

It is also advantageous if the injection material in the hardened

Condition good adhesion to the Schott layer and / or to the

Penetration element, in particular to both, has.

Most preferably, the injection material is um

Products of Sika ^® Injection series such as Sika ^® lnjection-201 CE, Sika ^® lnjection-201 RC, Sika ^® lnjection-203 Sika ^® lnjection-451 Sika ^® lnjection-304

Sika ^® lnjection-305 Sika ^® lnjection-306 Sika ^® InjectoCem series such as

Sika ^® InjectoCem-190 or Sikadur ^® -52 Injection.

For application of the sealant this can with the help of a one- or two-component pump via filling and injection hoses

(Injection packer) under pressure practice the connecting portion 10 in the

Interspace 8 to be injected.

The sealing device 16 may be a water-swelling body 18, as shown in FIG. 2 and FIG. If the sealing device is a water-swelling body, then possible openings through which water could penetrate to the penetration point, for example

Openings between penetrating element and mounting plate or mounting plate and Schott layer, closed by the swelling material and the central passage point protected by the Schott layer from penetrating water. FIG. 2 shows the situation of a

water-swelling body from contact with moisture, Figure 3 after contact with water 20, which through openings between penetrating element and mounting plate and mounting plate and Schott layer could penetrate. The water-induced swelling leads to a closure and sealing of the openings.

The water-swelling body preferably consists of the same water-swellable materials as previously described.

The Schott layer 2 may consist of all materials which ensure sufficient tightness even at high liquid pressures.

It is therefore advantageous if the Schott layer 2 has a high

Resistant to water pressure, as well as good values in

Tear tests and perforation tests show what is particularly advantageous for mechanical loads on construction sites.

It is particularly advantageous if the Schott layer 2 is a thermoplastic layer, preferably a polyethylene layer. This results in a high resistance to environmental influences.

Preferably, the bulkhead layer 2 is selected from materials selected from the group consisting of high density polyethylene (HDPE), medium density polyethylene (MDPE), low density polyethylene (LDPE), polyethylene (PE), polyethylene terephthalate (PET), polystyrene (PS ), Polyvinyl chloride (PVC), polyamides (PA), ethylene-vinyl acetate (EVA), chlorosulfonated polyethylene, thermoplastic polyolefins (TPO), ethylene-propylene-diene rubber (EPDM), and mixtures thereof.

The Schott layer 2 may have a thickness of 0.1-10 mm, in particular 0.5-2.5 mm, preferably 0.8-1.5 mm.

FIG. 4 shows a further device according to the invention and shows a device 1 in which the cross-section of FIG

Fixing plate is designed such that its edge portion 12 is curved against the anchor member and rests in contact with the Schott layer on this annular. Such an embodiment is advantageous in that sharp edges of the mounting plate in the region of the Schott layer, which could lead to injury of those, are largely avoided. It can also be seen in FIG. 4 that the device can furthermore have a protective layer 13 which is arranged on the side of the fastening plate facing the anchor element 5 and in connection with the device with the Schott layer between the fastening plate and

Schott layer comes to rest.

This protective layer can protect the bulkhead layer from damage by the mounting plate and provide a more uniform contact pressure through the mounting plate, by balancing non-uniform support points of the mounting plate.

The protective layer is preferably made of the same material as the Schott layer. Preferably, the protective layer is bonded by gluing or welding to the Schott layer.

A further aspect of the present invention comprises a method for sealing substrates 3 in the construction sector, in particular in the construction sector

Watershed area using a device as described above. The method comprises the steps:

1) attaching the anchor element 5 to the substrate 3,

2) attaching the penetrating element 4, which penetrates the Schott layer 2, to the anchor element 5

3) mounting the fastening plate 7 on the penetrating element and bracing the Schott layer 2 on the basis of the penetrating element 4 between the fastening plate and the anchoring element 4,

4) sealing the gap 8 by means of sealing device 16, 5) attaching building material 17 to the mounting plate. 7

facing side of the Schott layer 2.

The application of building material 17 is preferably an application of liquid concrete to the attachment plate 7

facing side of the Schott layer 2 or attaching a

Building construction, in particular on the mounting plate 7 and / or the penetrating element 4. If liquid concrete is applied, a formwork is usually attached at a sufficient distance on the mounting plate 7 facing side of the bulkhead layer and given the liquid concrete between the formwork and the bulkhead.

If the liquid concrete is shotcrete, it is

Usually a formwork is not necessary and the concrete is injected directly onto the bulkhead layer.

In building construction, which can be attached to the mounting plate 7 and / or the penetrating element 4, it is

typically prefabricated components, which can thereby be firmly anchored to the ground.

If a protective layer is to be arranged between the fastening plate and the Schott layer, it is advantageous if, before attaching the

Fixing plate 7 between the anchor element 5 and the Schott layer 2 and / or between the mounting plate 7 and the Schott layer 2, a protective layer 13 is attached. Preferably, the protective layer is welded or glued to the Schott layer.

If the sealing device 16 of the device is a connecting section 10, the sealing of the intermediate space 8 by means of a sealing device can take place by introducing an injection material 14 through the connecting section 10 into the intermediate space 8.

Preferably, it is an injection material as described above. Especially preferred are those

Injection materials which were previously described as preferred.

If the sealing device 16 of the device is a water-swelling body 18, the sealing of the

Interspace 8 done by means of sealing device by introducing the water-swelling body in the space. Preferably, the water-swelling body is made of a material as previously described. Especially preferred are those water swellable materials, which were previously described as preferred.

FIGS. 5a and 5b show the devices according to the invention in the installed state. In FIG. 5 a, the two devices are cast in a shell 21 made of cement which adjoins the bulkhead layer, to which water 20 adjoins. The shell is firmly connected to the ground due to the penetrating elements and the mounting plates. The upper mounting plate has a plurality of support elements 15, which contributes to a broad distribution of the load, respectively anchoring load. The lower mounting plate was placed on the penetrating element

screwed, which also serves as a carrier element in the shell due to its length.

FIG. 5 b shows a shell 21, to which water 20 adjoins, which is connected to the substrate 3 by the carrier elements 15. The shell can, for example, made of prefabricated elements such as concrete slabs

be composed.

Another aspect of the invention relates to a building comprising a device according to the invention. Such structures are throughout

Building area possible where a Schott layer, which of

Penetration elements is punctured, at the penetration points against oppressive liquids, must be sealed. LIST OF REFERENCE NUMBERS

contraption

Schott layer

underground

penetrating

anchor element

Section of the penetrating element 4

mounting plate gap

penetration point

connecting portion

the anchor element facing away from the mounting plate. 7

edge section

protective layer

injection material

support elements

sealing device

building materials

water-swelling body

vent valve

water

Bowl

Claims

claims

1 . Awning (1) for sealing one to a substrate (3)

attached Schott layer (2) in the construction sector, in particular in

Watershed area, with at least one penetrating element (4), which penetrates the bulkhead layer,

with an anchor element (5) which can be connected to the substrate and in which a section (6) of the penetrating element (4) can be received,

with a mounting plate (7), via which, by means of

Penetration element, the Schott layer is connectable to the anchor member, wherein the mounting plate has a cross section which is designed such that it forms in contact with the Schott layer a gap (8), which comprises the penetration point (9) of the penetrating element through the Schott layer and the Mounting plate further comprises a sealing device (16) for the intermediate space.

Device according to claim 1,

characterized,

that the cross section of the mounting plate is designed such that its edge portion (12) is curved against the anchor member and contact with the Schott layer annularly rests on this.

Apparatus according to claim 1 or 2,

characterized,

in that the device further comprises a protective layer (13) which is arranged on the side of the fastening plate facing the anchor element (5) and comes to rest in connection with the device with the Schott layer between the fastening plate and the Schott layer. Device according to at least one of the preceding claims, characterized

the penetrating element (4) is designed as a tensioning means.

Device according to at least one of the preceding claims, characterized

that on the side facing away from the anchor element (1 1) of the

Attachment plate carrier elements (15) are arranged.

Device according to at least one of the preceding claims, characterized

the bulkhead layer can be clamped between the anchor element and the fastening plate due to the penetrating element (4).

Device according to one of the preceding claims,

characterized,

in that the sealing device (16) is a

Connecting portion (10), in particular an injection valve, acts.

Device according to one of claims 1 - 6,

characterized,

in that the sealing device (16) is a

water-swelling body (18) acts.

Process for the waterproofing of subsoil (3) in the construction sector, in particular in the aquifer sector using a

Device (1) according to any one of claims 1-8 comprising the steps:

1) attaching the anchor element (5) to the substrate (3),

2) attaching the penetrating element (4), which penetrates the Schott layer (2), to the anchoring element (5) 3) attaching the mounting plate (7) on the penetrating element and clamp the Schott layer (2) on the basis of

Penetration element (4) between the mounting plate and

Anchor element (4),

4) sealing the intermediate space (8) by means of a sealing device (16),

5) attaching building material (17) to the mounting plate (7) facing side of the Schott layer (2).

10. The method according to claim 9,

characterized,

in that the application of building material (17) involves application of liquid concrete to the side of the bulkhead layer (2) facing the fastening plate (7) or attachment of a structural construction, in particular to the fastening plate (7) and / or the

Penetration element (4), acts.

1 1. Process according to claim 9 or 10,

characterized,

that before attaching the mounting plate (7) between

Anchor element (5) and Schott layer (2) and / or between

Fixing plate (7) and Schott layer (2) a protective layer (13) is attached, preferably, the protective layer with the

Schott layer welded or glued. 12. The method according to any one of claims 9 - 1 1,

characterized,

in that it is a device (1) according to claim 7 and that when sealing the intermediate space (8) by means of

Sealing device (16) is selected for introducing an injection material (14) from the list consisting of polyurethane,

Epoxy resin, acrylates and mineral binder by the

Connecting portion (10) in the intermediate space (8) acts. Process according to claim 12,

characterized,

the injection material, after introduction into the intermediate space (8), closes the penetration point (9) in a fluid-tight manner.

Method according to one of claims 12 or 13,

characterized,

that the injection material hardens after introduction into the intermediate space (8) and thereby expands and / or is water-swelling in the hardened state.

Method according to one of claims 9 to 11,

characterized,

that it is a device (1) according to claim 8 and that it is in the sealing of the intermediate space (8) by means of

A sealing device (16) for introducing the water-swelling body (18) into the space (8).