EP2672016B1 - Grout seal and method to grout an annular space between two foundation members of an offshore structure - Google Patents
Grout seal and method to grout an annular space between two foundation members of an offshore structure Download PDFInfo
- Publication number
- EP2672016B1 EP2672016B1 EP12004238.7A EP12004238A EP2672016B1 EP 2672016 B1 EP2672016 B1 EP 2672016B1 EP 12004238 A EP12004238 A EP 12004238A EP 2672016 B1 EP2672016 B1 EP 2672016B1
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- EP
- European Patent Office
- Prior art keywords
- grout
- sealing member
- foundation
- seal
- wall
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 239000011440 grout Substances 0.000 title claims description 98
- 238000000034 method Methods 0.000 title claims description 20
- 238000007789 sealing Methods 0.000 claims description 89
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 17
- 238000006073 displacement reaction Methods 0.000 claims description 15
- 230000000284 resting effect Effects 0.000 claims description 6
- 239000012528 membrane Substances 0.000 claims description 2
- 239000000463 material Substances 0.000 description 15
- 229910052910 alkali metal silicate Inorganic materials 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
- E02D27/42—Foundations for poles, masts or chimneys
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
- E02D27/50—Anchored foundations
Definitions
- the invention refers to a grout for sealing the annular space between two concentrically placed foundation members of an offshore structure including at least one sealing member extending within the annular space between the foundation members in order to seal a grout against the ingress of water and to secure said grout against egress into water.
- the invention furthermore refers to a method to grout an annular space between two foundation members of an offshore structure.
- a grout seal and a method for grouting are for instance disclosed in GB 2 433 540 A .
- a secondary contingency brush seal to support the grout if the primary seal fails.
- This method is particularly intended for grouting the annuli between an offshore platform leg or pile sleeve and a foundation pile driven there through.
- a method for grouting annuli in offshore platforms is also disclosed in European patent application 0 204 041 .
- This reference moreover discloses a grouting arrangement for an offshore platform having an annular support member, having in turn a pile driven there through forming an annular space there between.
- This arrangement comprising a seal assembly including a lower pile seal assembly attached to the annular support member and an upper pile seal assembly attached to said annular support member.
- the grout system for grouting said annular space includes a control valve for controlling the flow of grouting material into said anular space, a surface grout line leading to the control valve, and a first line leading from the control valve to said annular space.
- the annular space is located between the lower and upper pile seal assembly, a lower pile seal assembly provides a small annular space in which a material can be pumped to seal the space and which has great enough load-bearing strength to support in conjunction with a pile seal member a grout column in an annular space above the aforementioned space.
- Tubular grouted connections as aforementioned are commonly used in offshore constructions, including offshore wind turbine generator support structures.
- the connection may be between a transition piece and pile on a monopile-type foundation or between a pile and pile sleeve of a jacket or a tripod-type foundation.
- rubber wiper seals are normally used as a temporarily seal at the bottom of tubular grouted connections to contain the grout prior to its curing. After curing, the grout is normally self-supporting.
- Common grouted connections normally rely on a pressure being exerted on the top of the seal by the uncured grout to maintain a seal between for instance the pile sleeve and the pile against ingress of salt water as long as the grout is not yet cured.
- the known grouted connections suffer also from the disadvantage that a loss of grout during establishment of the grouted connection might occur.
- US 4,552, 486 discloses an improved grouting method and arrangement using aqueous solutions of alkali silicate materials confined between a pair of pile seal assemblies in sealing the annular space formed between either a jacket leg or pile sleeve and a pile driven therethrough or similar annular space of an offshore platform to support a column of grout thereon so that the annular space may ultimately be filled with grouting material.
- the invention provides a grout seal for sealing the annular space between two concentrically placed foundation members of an offshore structure including at least one sealing member extending within the annular space between the foundation members in order to seal a grout against the ingress of water and to secure said grout against egress into water.
- This grout seal is characterized by at least one elastically compressible member extending within said annular space and permanently providing an active pressure acting radially against horizontal or radial displacement of the foundation members relative to each other.
- Said elastically compressible member will expand and contract with the horizontal displacement of the foundation members relative to each other. This results in a reduction of stresses in the grout at the end of the connection.
- the grout seal according to the invention comprises at least one resilient primary sealing member attached to the inner wall of an outer foundation member or to the outer wall of an inner foundation member and resting against the outer wall of the inner foundation member or resting against the inner wall of the outer foundation member in order to seal said grout against the ingress of water and/or to secure said grout against egress into water, this grout seal being characterized by at least one elastically compressible secondary sealing member directly exposed to the said grout and being arranged in a fashion that allows said secondary sealing member to be at least partially readily compressed by the pressure exerted by the grout mass.
- Said sealing member will be radially compressed by the mass of the "wet" grout column exerting pressure on the sealing member. Once the grout is fully cured, due to the elastic deformation of the secondary sealing member, said sealing member will expand and contract with the horizontal displacement of the outer wall relative to the inner wall. This results in a reduction of stresses in the grout at the end of the connection. Moreover, a sealing engagement of the sealing member with the surrounding material is always provided due to the resilience of the material and due to the compression force stored in the material of the sealing member.
- the secondary sealing member provides an active pressure acting radially against horizontal or radial displacement of the foundation member relative to each other.
- the secondary sealing member is directly attached to the primary sealing member.
- the secondary sealing member for instance can be glued or sprayed onto the rubber wiper seal providing the primary seal and/or onto the steel walls of the foundation members.
- the secondary sealing member can be provided in the form of a foamed material, which for instance has been expanded by a chemical reaction.
- the secondary sealing member may for instance be provided as a foamed polyurethane sealing.
- the primary sealing member may be in the form of a diaphragm-type wiper seal, the lower, downwardly facing surface of which peripherally rests against the outer wall of the inner foundation member.
- the secondary sealing member may be at least partially attached to the upper surface of the primary sealing member.
- the secondary sealing member can be provided as an elastically deformable and compressible layer directly attached to the surface of the primary sealing member. Attached in the sense of the present invention means “glued”, “sprayed”, or “welded” onto the primary sealing member.
- a secondary sealing member may be at least partially attached to the inner wall of the outer foundation member or the outer wall of the inner foundation member.
- the secondary sealing member is a compressible membrane which has preferably being glued, welded or sprayed onto the primary seal and/or the inner wall of the outer foundation member and/or the outer wall of the inner foundation member.
- the secondary sealing member may comprise at least one elastomeric pad which has been placed so between the inner wall of the outer foundation member and the outer wall of the inner foundation member that it may be at least partially radially compressed by the pressure exerted by the grout mass.
- a grout seal for sealing the annular space between two concentrically placed foundation members of an offshore structure including at least one resilient sealing member attached to the inner wall of an outer foundation member, said sealing member extending peripherally within the annular space between the foundation members in order to seal a grout against the ingress of water and to secure said grout against egress into water, this grout seal being characterized in that the sealing member at least where exposed to said grout has elastically compressible/deformable properties to such an extent that it may be compressed by the grout and provides an active pressure after the grout has been cured.
- the sealing member may be positioned and dimensioned such that it provides an active pressure acting radially against horizontal or radial displacement of the foundation members relative to each other.
- the object of the invention is also achieved by a method to grout an annular space between two foundation members of an offshore structure, the method including providing at least one elastically deformable member extending in the annular space such that the elastically member provides an active pressure acting radially against horizontal and/or radial displacements of the foundation members relative to each other.
- the method according to the invention includes providing at least one elastically compressible sealing member, exposing said sealing member to a grout to be filled into said annular space such that it is at least partially compressed by the mass of said grout while not yet cured to such an extent that the sealing member provides an active pressure acting radially against horizontal or radial displacement of the foundation members relative to each other.
- the method according to the invention is characterized by providing at least a primary and a secondary sealing member, whereas the secondary sealing member is elastically compressible.
- the secondary sealing is placed above the primary sealing member so that the secondary sealing member at least carries a part of the weight force exerted by the column of the wet grout resting on the sealing member.
- Figure 1 shows a part of an offshore platform, namely a jacket foundation 1 the legs 2 of which are provided with pile sleeves 3, which are penetrated by piles 4 fixed to the sea floor 5.
- the piles 4 have been rammed into the sea floor prior to attachment of the jacket foundation 1.
- the grout seal according to the present invention is suitable and applicable for any type of offshore foundations, namely also for monopile foundations.
- the specific embodiment refers, however, to a jacket foundation.
- the piles of the jacket foundation according to the specific embodiment have been driven through a template in order to determine the exact position of the piles 4.
- This method is commonly known is prepiling as opposed to so-called postpiling, where the jacket foundation 1 is first placed on the sea floor 5 and the piles 4 are rammed through the pile sleeves 3 afterwards.
- the jacket foundation 1 has been placed on the sea floor 5 after ramming of the piles 4 in predetermined positions.
- the jacket foundation 1 has been placed onto the piles 4 such that the piles 4 extend through the pile sleeves 3. This connection has been grouted afterwards as this will be described in more detail in the following.
- the pile sleeve 3 defines an outer foundation member
- the pile 4 defines an inner foundation member
- the inner foundation member is defined by the pile 4, the pile sleeve 3 and the pile 4 being concentrically placed with respect to one another defining an annular space 8 there between.
- the wiper seal 7 at its inwardly directed rim 9 rests against an outer wall 10 of the pile 4.
- grouted connection/grout seal must not necessarily be a connection between pile sleeves and piles, but rather may be any connection between foundation members more or less concentrically arranged within each other and defining an annular space there between.
- outer foundation member and the inner foundation member have circular cross sections, although in the instant application for the sake of simplification the term "concentrically" is being used.
- Figure 2 shows the connection still to be grouted where the piles 4 already penetrate the pile sleeves 3.
- the diaphragm-type wiper seal 7 which for instance may be made from a resilient rubber-type material has been pierced and/or deflected by the pile 4 while the pile sleeve 3 has been put on the pile 4.
- a secondary sealing member 11 attached to the upwardly facing surface of the wiper seal 7 is a secondary sealing member 11 which is for instance made from a compressible foamed material.
- the secondary sealing member 11 fully covers the upper surface of the wiper seal as well as part of the inner wall 6 of pile sleeve 3 so that the secondary sealing member together with the wiper seal form a kind of pocket 12 for receiving a grout 13.
- the grout may be in form an alkali silicate material which cures upon contact with a curing agent.
- the grout 13 may be injected into the annular space 8 via a grouting line, which for the sake of simplification is not shown in the drawings. The grouting line will lead into the annular space 8 somewhere above the wiper seal 7.
- FIG 3 shows the grouted connection according to the invention with the grout 13 filled in.
- the column of the grout mass 13 resting on the wiper seal will consequently compress the secondary sealing member as this is suggested in Figure 3 .
- the mass of the grout 13 will not fully rest on the wiper seal 7 anymore.
- the grout 13 will shrink to a certain extent upon hardening.
- the sealing member Due to the compressibility of the secondary sealing member 11, the sealing member provides an active pressure and seal during horizontal displacements of the pile sleeves 6 relative to the piles 4, as this is suggested by the arrows in Figure 3 .
- This pressure is constantly urging the wiper seal into engagement of the outer wall 10 of the pile 4.
- FIG. 4 An alternative embodiment of the present invention is shown in Figure 4 which shows the ungrouted connection. Same parts are provided with the same reference numerals.
- the secondary sealing member is only in the form of a compressible sealing pad 14 attached to the upper surface of the wiper seal 7 and covering only the peripheral rim of the wiper seal 7 in the area where the wiper seal 7 is deflected by the pile 4 and extends vertically.
- the secondary sealing member 11 may for instance only be provided on the inner wall 6 of the pile sleeve 3 in that area where the wiper seal 7 and the pile sleeve 3 form a pocket 12 for receiving the grout 13.
- a primary sealing member is provided by a grout packer 15 which is designed as an elastically deformable hollow torus member attached to the inner wall 6 of the pile sleeves 3 which in this embodiment form the outer foundation member.
- the grout packer 15 is filled with a liquid or a gas or a curable elastically deformable material and maintains an active pressure and seal during horizontal displacement of the inner wall 6 of the pile sleeves 3 relative to the outer wall 10 of the pile 4.
- the grout 13 rests on the grout packer 15, however, there may be provided an additional wiper seal above or below the grout packer 15.
- the grout packer 15 is attached to the inner wall 6 of the pile sleeve 3, however, the grout packer 15 may also be attached to the outer wall 10 of the pile 4.
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- General Life Sciences & Earth Sciences (AREA)
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- General Engineering & Computer Science (AREA)
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Description
- The invention refers to a grout for sealing the annular space between two concentrically placed foundation members of an offshore structure including at least one sealing member extending within the annular space between the foundation members in order to seal a grout against the ingress of water and to secure said grout against egress into water.
- The invention furthermore refers to a method to grout an annular space between two foundation members of an offshore structure.
- A grout seal and a method for grouting are for instance disclosed in
GB 2 433 540 A - A method for grouting annuli in offshore platforms is also disclosed in European patent application
0 204 041 . This reference moreover discloses a grouting arrangement for an offshore platform having an annular support member, having in turn a pile driven there through forming an annular space there between. This arrangement comprising a seal assembly including a lower pile seal assembly attached to the annular support member and an upper pile seal assembly attached to said annular support member. The grout system for grouting said annular space includes a control valve for controlling the flow of grouting material into said anular space, a surface grout line leading to the control valve, and a first line leading from the control valve to said annular space. The annular space is located between the lower and upper pile seal assembly, a lower pile seal assembly provides a small annular space in which a material can be pumped to seal the space and which has great enough load-bearing strength to support in conjunction with a pile seal member a grout column in an annular space above the aforementioned space. - Tubular grouted connections as aforementioned are commonly used in offshore constructions, including offshore wind turbine generator support structures. The connection may be between a transition piece and pile on a monopile-type foundation or between a pile and pile sleeve of a jacket or a tripod-type foundation. As this is for instance also disclosed in
EP 0 204 041 A , rubber wiper seals are normally used as a temporarily seal at the bottom of tubular grouted connections to contain the grout prior to its curing. After curing, the grout is normally self-supporting. Common grouted connections normally rely on a pressure being exerted on the top of the seal by the uncured grout to maintain a seal between for instance the pile sleeve and the pile against ingress of salt water as long as the grout is not yet cured. - Sometimes, as this is the case with the grouting method disclosed in
EP 0 204 041 A , additional sealing measures have been proposed in order to provide proper sealing against the ingress of water and in order to secure said grout against egress into water. - When the grouted connection is subject to bending, relative displacement of the outer wall relative to the inner wall will occur. With the current design, this means that a gap will open between the seal and the inner wall and the seal will be lost. The loss of seal has the consequence that water can enter the grouted connection which as a detrimental impact on the fatigue performance of the grout. In the event of local grout crushing or cracking at the highly stressed end of the grouted connection, the seal is not able to prevent loss of crushed/cracked grout material. The likelihood of grout material being lost is increased, since the seal does not prevent the ingress and egress of water.
- As this can be for instance taken from the aforementioned patent publication, the known grouted connections suffer also from the disadvantage that a loss of grout during establishment of the grouted connection might occur.
-
US 4,552, 486 discloses an improved grouting method and arrangement using aqueous solutions of alkali silicate materials confined between a pair of pile seal assemblies in sealing the annular space formed between either a jacket leg or pile sleeve and a pile driven therethrough or similar annular space of an offshore platform to support a column of grout thereon so that the annular space may ultimately be filled with grouting material. - It is thus an object of the present invention to provide a grouted seal which does not suffer from the above-mentioned disadvantages. It is moreover an object of the present invention to provide a method to grout an annular space between two foundation members avoiding the above-mentioned disadvantages. This and other objects are solved by the invention as defined by the independent claims. Advantageous embodiments may be derived from the dependent claims.
- The invention provides a grout seal for sealing the annular space between two concentrically placed foundation members of an offshore structure including at least one sealing member extending within the annular space between the foundation members in order to seal a grout against the ingress of water and to secure said grout against egress into water. This grout seal is characterized by at least one elastically compressible member extending within said annular space and permanently providing an active pressure acting radially against horizontal or radial displacement of the foundation members relative to each other.
- Said elastically compressible member will expand and contract with the horizontal displacement of the foundation members relative to each other. This results in a reduction of stresses in the grout at the end of the connection.
- The grout seal according to the inventioncomprises at least one resilient primary sealing member attached to the inner wall of an outer foundation member or to the outer wall of an inner foundation member and resting against the outer wall of the inner foundation member or resting against the inner wall of the outer foundation member in order to seal said grout against the ingress of water and/or to secure said grout against egress into water, this grout seal being characterized by at least one elastically compressible secondary sealing member directly exposed to the said grout and being arranged in a fashion that allows said secondary sealing member to be at least partially readily compressed by the pressure exerted by the grout mass.
- Said sealing member will be radially compressed by the mass of the "wet" grout column exerting pressure on the sealing member. Once the grout is fully cured, due to the elastic deformation of the secondary sealing member, said sealing member will expand and contract with the horizontal displacement of the outer wall relative to the inner wall. This results in a reduction of stresses in the grout at the end of the connection. Moreover, a sealing engagement of the sealing member with the surrounding material is always provided due to the resilience of the material and due to the compression force stored in the material of the sealing member.
- It is particularly advantageous that the secondary sealing member provides an active pressure acting radially against horizontal or radial displacement of the foundation member relative to each other.
- In one particularly preferred embodiment of the invention, the secondary sealing member is directly attached to the primary sealing member. The secondary sealing member for instance can be glued or sprayed onto the rubber wiper seal providing the primary seal and/or onto the steel walls of the foundation members. The secondary sealing member can be provided in the form of a foamed material, which for instance has been expanded by a chemical reaction. The secondary sealing member may for instance be provided as a foamed polyurethane sealing.
- The primary sealing member may be in the form of a diaphragm-type wiper seal, the lower, downwardly facing surface of which peripherally rests against the outer wall of the inner foundation member.
- The secondary sealing member may be at least partially attached to the upper surface of the primary sealing member. As aforementioned, the secondary sealing member can be provided as an elastically deformable and compressible layer directly attached to the surface of the primary sealing member. Attached in the sense of the present invention means "glued", "sprayed", or "welded" onto the primary sealing member.
- Alternatively or additionally, a secondary sealing member may be at least partially attached to the inner wall of the outer foundation member or the outer wall of the inner foundation member.
- It is readily apparent for a person skilled in the art that many variations of the secondary seal member are within the scope of the present invention as long as the secondary sealing member exerts expansion forces acting readily between the foundation members.
- In a particularly preferred embodiment of the grout seal according to the present invention, the secondary sealing member is a compressible membrane which has preferably being glued, welded or sprayed onto the primary seal and/or the inner wall of the outer foundation member and/or the outer wall of the inner foundation member.
- Alternatively, the secondary sealing member may comprise at least one elastomeric pad which has been placed so between the inner wall of the outer foundation member and the outer wall of the inner foundation member that it may be at least partially radially compressed by the pressure exerted by the grout mass.
- According to yet another aspect of the present invention, there is provided a grout seal for sealing the annular space between two concentrically placed foundation members of an offshore structure including at least one resilient sealing member attached to the inner wall of an outer foundation member, said sealing member extending peripherally within the annular space between the foundation members in order to seal a grout against the ingress of water and to secure said grout against egress into water, this grout seal being characterized in that the sealing member at least where exposed to said grout has elastically compressible/deformable properties to such an extent that it may be compressed by the grout and provides an active pressure after the grout has been cured.
- The sealing member may be positioned and dimensioned such that it provides an active pressure acting radially against horizontal or radial displacement of the foundation members relative to each other.
- According to yet another aspect of the present invention, there is provided a method to grout an annular space between two foundation members of an offshore structure.
- The object of the invention is also achieved by a method to grout an annular space between two foundation members of an offshore structure, the method including providing at least one elastically deformable member extending in the annular space such that the elastically member provides an active pressure acting radially against horizontal and/or radial displacements of the foundation members relative to each other.
- The method according to the invention includes providing at least one elastically compressible sealing member, exposing said sealing member to a grout to be filled into said annular space such that it is at least partially compressed by the mass of said grout while not yet cured to such an extent that the sealing member provides an active pressure acting radially against horizontal or radial displacement of the foundation members relative to each other.
- The method according to the invention is characterized by providing at least a primary and a secondary sealing member, whereas the secondary sealing member is elastically compressible.
- It is particularly advantageous when the secondary sealing is placed above the primary sealing member so that the secondary sealing member at least carries a part of the weight force exerted by the column of the wet grout resting on the sealing member.
- The invention in the following will be described by way of example with reference to the accompanying drawings in which:
- Figure 1
- shows in a rather simplified manner an offshore platform with a jacket foundation comprising pile sleeves enclosing foundation piles,
- Figure 2
- shows an enlarged detail of the grouted connection of the pile sleeves and piles shown in
Figure 1 , as a sectional view prior to grouting, - Figure 3
- shows an enlarged longitudinal sectional view corresponding to the view in
Figure 2 with the injected grout mass, - Figure 4
- shows another embodiment of the grouted connection according to the present invention, and
- Figure 5
- shows yet another embodiment of the grouted connection according to the present invention.
-
Figure 1 shows a part of an offshore platform, namely ajacket foundation 1 thelegs 2 of which are provided withpile sleeves 3, which are penetrated bypiles 4 fixed to thesea floor 5. In this specific embodiment as described hereinafter, thepiles 4 have been rammed into the sea floor prior to attachment of thejacket foundation 1. It is to be understood that of course the grout seal according to the present invention is suitable and applicable for any type of offshore foundations, namely also for monopile foundations. By way of example the specific embodiment refers, however, to a jacket foundation. - The piles of the jacket foundation according to the specific embodiment have been driven through a template in order to determine the exact position of the
piles 4. This method is commonly known is prepiling as opposed to so-called postpiling, where thejacket foundation 1 is first placed on thesea floor 5 and thepiles 4 are rammed through thepile sleeves 3 afterwards. - With the instant embodiment, the
jacket foundation 1 has been placed on thesea floor 5 after ramming of thepiles 4 in predetermined positions. Thejacket foundation 1 has been placed onto thepiles 4 such that thepiles 4 extend through thepile sleeves 3. This connection has been grouted afterwards as this will be described in more detail in the following. - As this can be taken from
Figure 2 , thepile sleeve 3 defines an outer foundation member, whereas thepile 4 defines an inner foundation member. Attached to theinner wall 6 of the outer foundation member, i.e. thepile sleeve 3, is a diaphragm-type wiper seal 7. The inner foundation member is defined by thepile 4, thepile sleeve 3 and thepile 4 being concentrically placed with respect to one another defining anannular space 8 there between. Thewiper seal 7 at its inwardly directed rim 9 rests against anouter wall 10 of thepile 4. - A person skilled in the art will appreciate that the grouted connection/grout seal according to the instant application must not necessarily be a connection between pile sleeves and piles, but rather may be any connection between foundation members more or less concentrically arranged within each other and defining an annular space there between.
- Also it is not necessarily required that the outer foundation member and the inner foundation member have circular cross sections, although in the instant application for the sake of simplification the term "concentrically" is being used.
-
Figure 2 shows the connection still to be grouted where thepiles 4 already penetrate thepile sleeves 3. The diaphragm-type wiper seal 7 which for instance may be made from a resilient rubber-type material has been pierced and/or deflected by thepile 4 while thepile sleeve 3 has been put on thepile 4. - Although a conventional wiper seal has a certain resilience, this material is not compressible.
- As this can be taken from
Figures 2 and3 , attached to the upwardly facing surface of thewiper seal 7 is a secondary sealing member 11 which is for instance made from a compressible foamed material. The secondary sealing member 11 fully covers the upper surface of the wiper seal as well as part of theinner wall 6 ofpile sleeve 3 so that the secondary sealing member together with the wiper seal form a kind of pocket 12 for receiving agrout 13. The grout may be in form an alkali silicate material which cures upon contact with a curing agent. Thegrout 13 may be injected into theannular space 8 via a grouting line, which for the sake of simplification is not shown in the drawings. The grouting line will lead into theannular space 8 somewhere above thewiper seal 7. -
Figure 3 shows the grouted connection according to the invention with thegrout 13 filled in. The column of thegrout mass 13 resting on the wiper seal will consequently compress the secondary sealing member as this is suggested inFigure 3 . After thegrout 13 has been cured, the mass of thegrout 13 will not fully rest on thewiper seal 7 anymore. Moreover, thegrout 13 will shrink to a certain extent upon hardening. Due to the compressibility of the secondary sealing member 11, the sealing member provides an active pressure and seal during horizontal displacements of thepile sleeves 6 relative to thepiles 4, as this is suggested by the arrows inFigure 3 . This pressure is constantly urging the wiper seal into engagement of theouter wall 10 of thepile 4. Although this seems to be clear from the above-given description/explanations, it is to be mentioned that thewiper seal 7 completely peripherally surrounds thepile 4 and completely fills theannular space 8 between thepile sleeves 3 and piles 4. - An alternative embodiment of the present invention is shown in
Figure 4 which shows the ungrouted connection. Same parts are provided with the same reference numerals. - As this may be taken from
Figure 4 , the secondary sealing member is only in the form of acompressible sealing pad 14 attached to the upper surface of thewiper seal 7 and covering only the peripheral rim of thewiper seal 7 in the area where thewiper seal 7 is deflected by thepile 4 and extends vertically. - In an alternative embodiment to that, the secondary sealing member 11 may for instance only be provided on the
inner wall 6 of thepile sleeve 3 in that area where thewiper seal 7 and thepile sleeve 3 form a pocket 12 for receiving thegrout 13. - Yet another embodiment of the grout seal according to the present invention may be taken from
Figure 5 of the appended drawings. Same parts are denoted by the same reference numerals. - In this third embodiment according to the invention, a primary sealing member is provided by a
grout packer 15 which is designed as an elastically deformable hollow torus member attached to theinner wall 6 of thepile sleeves 3 which in this embodiment form the outer foundation member. Thegrout packer 15 is filled with a liquid or a gas or a curable elastically deformable material and maintains an active pressure and seal during horizontal displacement of theinner wall 6 of thepile sleeves 3 relative to theouter wall 10 of thepile 4. In the embodiment as shown inFigure 5 , thegrout 13 rests on thegrout packer 15, however, there may be provided an additional wiper seal above or below thegrout packer 15. - In the embodiment shown in
Figure 5 , thegrout packer 15 is attached to theinner wall 6 of thepile sleeve 3, however, thegrout packer 15 may also be attached to theouter wall 10 of thepile 4. -
- 1
- jacket foundation
- 2
- legs
- 3
- pile sleeves
- 4
- piles
- 5
- sea floor
- 6
- inner wall
- 7
- wiper seal
- 8
- annular space
- 9
- rim of wiper seal
- 10
- outer wall of pile
- 11
- secondary sealing member
- 12
- 13
- grout
- 14
- sealing pad
- 15
- grout packer
Claims (13)
- Grout seal for sealing the annular space (8) between two concentrically placed foundation members of an offshore structure including at least one sealing member extending within the annular space (8) between the foundation members in order to seal a grout (13) against the ingress of water and/or to secure said grout (13) against egress into water, comprising at least one resilient primary sealing member attached to the inner wall (6) of an outer foundation member or to the outer wall (10) of an inner foundation member and resting against the outer wall (10) of the inner foundation member or resting against the inner wall of the outer foundation member in order to seal said grout (13), characterized by comprising at least one elastically compressible secondary sealing member (11) extending within said annular space (8) and permanently providing an active pressure acting radially against horizontal or radial displacement of the foundation members relative to each other and being directly exposed to said grout (13) and being arranged in a fashion that allows said secondary sealing member (11) to be at least partially radially compressed by the pressure exerted by the grout mass.
- Grout seal according to claim 1, characterized in that the secondary sealing member (11) provides an active pressure acting radially against horizontal or radial displacement of the foundation members relative to each other.
- Grout seal according to claim 1 or 2, characterized in that the secondary sealing member (11) is directly attached to the primary sealing member.
- Grout seal according to anyone of claims 1 to 3, characterized in that the primary sealing member is diaphragm-type wiper seal (7), the lower, downwardly facing surface of which peripherally rests against the outer wall (10) of the inner foundation member.
- Grout seal according to anyone of claims 1 to 4, characterized in that the secondary sealing member (11) is at least partially attached to the upper surface of the primary sealing member.
- Grout seal according to anyone of claims 1 to 5, characterized in that the secondary sealing member (11) is at least partially attached to the inner wall (6) of the outer foundation member.
- Grout seal according to anyone of claims 1 to 4, characterized in that the secondary sealing member (11) is attached to the outer wall of the inner foundation member.
- Grout seal according to anyone of claims 1 to 7, characterized in that the secondary sealing member (11) is a compressible membrane which preferably has been glued, welded or sprayed onto the primary sealing member and/or the inner wall of the outer foundation member and/or on the outer wall of the inner foundation member.
- Grout seal according to anyone of claims 1 to 8, characterized in that the secondary sealing member (11) comprises at least one elastomeric pad (14).
- Grout seal for sealing the annular space (8) between two concentrically placed foundation members of an offshore structure including at least one resilient sealing member attached to the inner wall of the outer foundation member, said sealing member extending peripherally within the annular space between the foundation members in order to seal a grout (13) against the ingress of water and secure said grout (13) against egress into water, characterized in that the sealing member at least where exposed to said grout (13) has elastically compressible properties to such an extent that it may be compressed by the grout (13) and provides an active pressure after the grout (13) has been cured.
- Grout according to claim 10, characterized in that the sealing member is positioned and dimensioned such that it provides an active pressure acting radially against horizontal or radial displacements of the foundation members relative to each other.
- Method to grout an annular space between two foundation members of an offshore structure, the method including providing at least one elastically compressible sealing member extending within said annular space and providing an active pressure acting radially against horizontal or radial displacement of the foundation members relative to each other, the method including exposing said elastically compressible sealing member to a grout to be filled within said annular space such that the sealing member is at least partially compressed by the mass of said grout while not yet cured to such an extent that the sealing member provides an active pressure acting radially against horizontal and/or radial displacement of the foundation members relative to each other, the method furthermore including providing at least a primary and a secondary sealing member, whereas the secondary sealing member is elastically compressible.
- Method according to claim 12, characterized in that the secondary sealing member is placed above the primary sealing member.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DK12004238.7T DK2672016T3 (en) | 2012-06-04 | 2012-06-04 | Grout seal and method for grouting an annular space between two foundation elements in an offshore structure |
EP12004238.7A EP2672016B1 (en) | 2012-06-04 | 2012-06-04 | Grout seal and method to grout an annular space between two foundation members of an offshore structure |
PL12004238T PL2672016T3 (en) | 2012-06-04 | 2012-06-04 | Grout seal and method to grout an annular space between two foundation members of an offshore structure |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP12004238.7A EP2672016B1 (en) | 2012-06-04 | 2012-06-04 | Grout seal and method to grout an annular space between two foundation members of an offshore structure |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2672016A1 EP2672016A1 (en) | 2013-12-11 |
EP2672016B1 true EP2672016B1 (en) | 2018-01-03 |
Family
ID=46319512
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP12004238.7A Active EP2672016B1 (en) | 2012-06-04 | 2012-06-04 | Grout seal and method to grout an annular space between two foundation members of an offshore structure |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2672016B1 (en) |
DK (1) | DK2672016T3 (en) |
PL (1) | PL2672016T3 (en) |
Families Citing this family (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103967036B (en) * | 2014-05-07 | 2016-12-07 | 中国水电顾问集团华东勘测设计研究院有限公司 | Stake and sleeve grouting attachment structure and construction method thereof for offshore wind farm |
CN105133661B (en) * | 2015-08-11 | 2019-07-05 | 深圳市腾海油田工程技术有限公司 | A kind of inflatable packer based on seabed spud leg |
JP2019513945A (en) | 2016-04-15 | 2019-05-30 | ピーユーアール ウインド エーピーエス | Gasket for wind turbine |
CN106193096A (en) * | 2016-08-31 | 2016-12-07 | 朱荣华 | A kind of split bridging type grouting sealing ring |
WO2018227357A1 (en) * | 2017-06-13 | 2018-12-20 | 衡橡科技股份有限公司 | Packer allowing piling to be performed first |
DE102017123935A1 (en) * | 2017-10-13 | 2019-04-18 | Rosen Swiss Ag | Sealing arrangement for a connection of two fasteners of an offshore structure and method for producing the same |
CN108729873B (en) * | 2018-07-16 | 2024-04-30 | 山东南海气囊工程有限公司 | Tandem compression packer |
CN108708686A (en) * | 2018-08-21 | 2018-10-26 | 天津熙盛科技发展有限公司 | A kind of passive type has the underwater packer of diminution gap function |
CN110747885B (en) * | 2019-10-30 | 2021-02-09 | 中铁大桥勘测设计院集团有限公司 | Packer and foundation pile structure |
CN111719554B (en) * | 2020-03-21 | 2021-09-21 | 东莞市大乘建筑工程技术有限公司 | Static pressure anchor rod pile foundation reinforcing structure and construction process thereof |
NL2025813B1 (en) * | 2020-06-11 | 2022-02-16 | Trelleborg Ridderkerk B V | Method for building a sealed structure comprising two tubular members, a sealed structure, an offshore wind turbine and a sealing system |
CN111560936B (en) * | 2020-07-13 | 2020-09-25 | 东营金联建筑工程有限公司 | Umbrella-shaped self-opening type ocean engineering pile pipe packer |
CN113529818B (en) * | 2021-07-13 | 2023-05-23 | 深圳市工勘岩土集团有限公司 | Non-welding anti-pulling static load test device for prestressed pipe pile |
CN113585363B (en) * | 2021-07-13 | 2023-05-23 | 深圳市工勘岩土集团有限公司 | Connection fixing structure of core filling steel bar of counter-force steel disc and prestressed pipe pile |
CN113529817B (en) * | 2021-07-13 | 2023-05-23 | 深圳市工勘岩土集团有限公司 | Non-welding anti-pulling static load test method for prestressed pipe pile |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4552486A (en) | 1984-03-21 | 1985-11-12 | Halliburton Company | Grouting method - chemical method |
GB2433540A (en) | 2005-12-22 | 2007-06-27 | Martin Hardy | Brush seal for grouting annuli |
-
2012
- 2012-06-04 PL PL12004238T patent/PL2672016T3/en unknown
- 2012-06-04 EP EP12004238.7A patent/EP2672016B1/en active Active
- 2012-06-04 DK DK12004238.7T patent/DK2672016T3/en active
Non-Patent Citations (1)
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Also Published As
Publication number | Publication date |
---|---|
EP2672016A1 (en) | 2013-12-11 |
PL2672016T3 (en) | 2018-06-29 |
DK2672016T3 (en) | 2018-04-16 |
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