JP2012517545A - Installation of submerged support structure - Google Patents

Abstract

In the method of installing the support structure (2) that is required to be installed on the seabed or riverbed (SB), work required to permanently fix the support structure on the seabed or riverbed (SB) Before and during these operations, the support structure is constructed so that it can temporarily stand upright on the seabed or riverbed (SB).

Description

  The present invention relates generally to installing a support structure on the seabed (or riverbed) that is mounted to project above the surface of the sea (or river).

  A possible application of such a support structure is to support a turbine driven by wind or water flow or a device driven by wave energy.

  More particularly, the present invention relates to a method of installing a support structure regardless of their purpose and the structure of the support structure.

  Although the support structure is generally installed to protrude above the surface of the sea or river, the upper parts of the support structure can be removed after installation of the support structure is complete if desired, and therefore In such a case, the remaining parts of the support structure, i.e. so-called fixed parts, remain completely submerged.

  For example, when installing a support structure to submerge the support structure to which the turbine equipment is attached to the offshore seafloor, a major problem associated with such installation is necessary to install the support structure. Is in time to be. That is, current installation methods use large installation vessels such as crane barges or jack-up barges to be on site to complete the foundation work. In fact, such an installation ship is necessary to place the support structure in place during a long installation period, and such an installation ship does not only make the cost per installation of a support structure very high. In addition, the number of installations of the support structure that can be completed in a predetermined period by a predetermined installation ship is reduced.

  It is an object of the present invention to provide a support structure, regardless of their purpose (but generally aimed at supporting turbines driven by wind or water currents or devices driven by wave energy). Another object of the present invention is to provide a method of installing on the seabed or riverbed so as to protrude above the water surface of the river and a structure of the support structure.

  Another object of the present invention is to provide a means by which the support structure can be installed even in bad conditions, for example in strong water currents or waves, thereby reducing the required follow-up of the installed ship. Can do.

  According to one aspect of the present invention, in a method for installing a support structure that is required to be installed on the seabed or riverbed, work required to permanently fix the support structure on the seabed or riverbed. Before and during these operations, a method is provided that includes constructing the support structure such that it can temporarily stand upright on the seabed or riverbed.

  Preferably, the support structure is in the form of elongated struts for supporting a submersible water driven turbine and / or a wind driven turbine.

  Preferably, the method for installing the support structure includes the step of fixing the support structure to the seabed or riverbed by a pile or similar anchoring means.

  Preferably, the support structure includes a plurality of anchor positions cooperating with a plurality of support structure support leg units, each of the support leg units receiving and installing a support structure anchor pile or similar means. The anchor pile or similar means is submerged on the seabed or riverbed by means supported by the support structure and capable of handling the anchor pile or similar means and submerging.

  Preferably, the support structure, such as the elongate strut, is designed to be lowered to the seabed or riverbed and leveled by adjusting means, the adjusting means having its respective independent seabed or riverbed connection. By adjusting the position of the landing gear before submergence of the associated anchor pile, it is possible to adapt to the uneven shape of the seabed or riverbed.

  If deemed necessary, the method of installing the support structure is such that the support structure is being installed while the support structure is being moved by water currents, waves or winds to maintain the installation period of the installation. Adding an additional weight to the support structure when there is a risk of insufficient frictional contact with the seabed or riverbed at

  According to another aspect of the present invention, in a support structure that can be installed on the seabed or riverbed, the support structure is on the seabed or riverbed with sufficient weight to hold it in place by frictional contact with the seabed or riverbed. A plurality of anchor positions configured to be sufficiently heavy to temporarily stand upright and cooperating with a plurality of adjustable seabed or riverbed engaging support leg units, said support leg unit; Each of which receives and installs an anchor pile for a support structure, and the anchor pile is supported by the support structure and is submerged on the seabed or riverbed by means for handling and submerging the anchor pile. A support structure is provided.

  In a preferred configuration, a temporary additional structure can be provided on top of the support structure, the temporary additional structure submerging the pile used to anchor the support structure to the seabed or riverbed. It is a structure for mounting / housing equipment that performs the work required to do it.

  According to yet another aspect of the present invention, there is a support structure that can be installed on the seabed or riverbed, temporarily during the work required to permanently fix the support structure on the seabed or riverbed. A support structure is provided that is constructed in a self-installable configuration so as to be self-standing.

  According to still another aspect of the present invention, there are a plurality of anchor positions provided with a plurality of support structure support leg units and a predetermined number of support structure anchors installed on the seabed or riverbed. Means for receiving and installing a pile, and means for handling the pile and submerging so that the pile is supported by the support structure and the pile serves to anchor the support structure to the seabed or riverbed. An enclosing support structure is provided.

  In a preferred configuration, each of the support leg units is associated with an adjustment means that can be selectively adjusted to position the pile at a fixed position of the pile.

  In a preferred configuration, the support structure leaves the support structure installation area as soon as the support structure is accurately positioned with the required pile handling equipment attached to the support structure. In order to be able to do so, it includes equipment capable of installing piles that serve to permanently fix the support structure to the seabed or riverbed. Preferably, the required equipment can be provided on land so that the entire self-standing support structure can be quickly lowered to the desired position, thereby allowing the delivery ship to leave the site.

  According to still another aspect of the present invention, there is provided a jacket-type support structure having at least one leg assembly, and the jacket-type support structure can stand firmly on a seabed or a riverbed with the leg assembly. And a jacket-type support structure having a height sufficient for an upper portion of the jacket-type support structure to protrude above the water surface.

  Preferably, when it is desired to finally submerge the support structure, a removable upper part can be attached, which can be attached to the support structure at the stage of installation of the support structure. It projects above the water surface for installation and can be removed following the stage of installation.

  Preferably, the upper part is removed using a crane attached to the boat.

  In a preferred configuration, the support structure is provided with three or four of the leg assemblies.

  Preferably, the support structure lowers the support structure onto the seabed or riverbed, then pierces through each of the leg assemblies, inserts pin piles, and grouts the pin piles in place. Designed to allow the support structure to be leveled to fit the uneven shape of the seabed or riverbed so that each of the leg assemblies can be secured to the seabed or riverbed. Yes.

  Preferably, the drilling operation is performed from a temporary structure attached to the top of the jacket-type support structure.

  If the support structure is at risk of being moved by water currents, waves or winds during the installation period of the installation, an additional weight can be added to the temporary structure, thereby supporting the support structure during the installation operation. It is possible to maintain sufficient friction with the seabed or riverbed. This additional weight can then be removed along with the installation equipment after the anchor pin pile has been installed and the support structure can no longer move with respect to the seabed or riverbed.

  From the above description, the present invention is a structure that can be installed in the sea (or in the river) and designed to be able to stand up temporarily with sufficient weight to hold it in place by friction with the seabed. And is permanently fixed to the seabed (or river bed) by using pin piles or other fastening means that can be pushed into the sea bed (river bed) through a tubular permanent footing integrally attached to the jacket structure It will be appreciated that it provides a structure having equipment to support the equipment that is needed. If necessary, an additional weight that creates enough friction to prevent movement can be temporarily provided as additional ballast to the structure, which is removed after the pin pile installation operation is completed.

  Therefore, according to the present invention, there is one or more tubular permanent footings capable of drilling a seabed or riverbed from a platform mounted above the water surface, and a pin pile is inserted into the permanent footings. A structure with a jacketed base that can be grouted in place is provided.

  More particularly, the structure includes a temporary footing that can be adjusted in height and alignment so that the structure can be leveled before the structure is secured to the seabed. The force to make such adjustments is provided by a hydraulic jack, screw jack or any other suitable device.

  Preferably, the temporarily adjustable footing can be attached inside or outside the permanent footing of the jacket or concentrically with the permanent footing.

  Preferably, the structure comprises means for positioning the conductor tube between a platform above the water surface or upper structure and a tubular permanent footing approaching the seabed, thereby providing a foundation pin pile. A drill string can be placed through the conductor tube and the tubular permanent footing from a drilling rig mounted on the upper structure for drilling a pin pile or alternatively for hitting a pin pile to the seabed.

  For a better understanding of the present invention and how to actually implement the present invention, reference will now be made to the accompanying drawings.

It is a figure which shows schematically the whole structure of the support jacket structure which includes the concept of this invention. FIG. 2 is an enlarged view showing the characteristics of the structure of the support legs included in the structure shown in FIG. 1. It is a figure which shows roughly an example of the position regarding the seabed or the riverbed of the support leg of the structure shown by FIG. FIG. 2 schematically shows further possible positions of the support legs of the structure shown in FIG. 1 with respect to the seabed or riverbed. FIG. 2 schematically illustrates a first stage of fixing the support jacket structure shown in FIG. 1 to the seabed or riverbed using a pin pile. Similarly, it is a figure which shows a 2nd step roughly. Similarly, it is a figure which shows a 3rd step roughly. Similarly, it is a figure which shows a 4th step roughly. Similarly, it is a figure which shows a 5th step roughly. Similarly, it is a figure which shows a 6th step schematically. Similarly, it is a figure which shows a 7th step schematically.

  Referring to FIG. 1, the support structure 1 shown in FIG. The jacket assembly 2 includes a main body 3 such as an upright monolithic post supported by a support leg assembly 4. The support leg assembly 4 is formed by four identical support leg units 5 that are disposed equiangularly around the main body (post) 3. Each of the supporting leg units 5 includes a central tubular structure 6 formed by an inner tube 5A and an outer tube 5B (which will be described in detail later), and a seabed or riverbed connected to the outer tube 5B. Engaging legs 7. The outer tube 5B is connected to a portion of the support leg assembly 4, ie, the lower end area 9 of the main body 3 of the structure 2, and the structure at a position above the associated horizontal member 8. A part of the supporting leg assembly 4, which is itself connected to the main body 3 of the assembly 2, is formed by an inclined member 10 connected to the two main bodies 3.

  Each of the seabed or riverbed engaging legs 7 is attached to the lower end of the outer pipe 5B by means of a pivotal connection device 11. The pivotal connection device 11 is required to bring the engagement leg 7 stationary with respect to the outer tube 5B when the engagement leg 7 is required to conform to the shape of a section of the seabed or riverbed. It can be raised or lowered. Concentric tube configurations can be considered as anchor legs for the jacket structure.

  The connecting device 11 can be tilted with respect to the inner tube 5A in order to allow the engaging leg 7 to move angularly with respect to the vertical axis of the central structure 6 of the associated support leg unit 5. The engagement leg 7 is also movable up and down in the axial direction with respect to the support leg assembly 4, so that a support adjustment can be made to ensure that the main body 3 of the jacket assembly 2 remains vertical. It facilitates an acceptable fit between the engagement leg 7 and the seabed or riverbed SB adjacent to this engagement leg as possible.

  Since the purpose is to firmly fix the jacket structure 2 to the seabed or riverbed SB, the support leg assembly 4 and the support structure 6 are fixed to the seabed or riverbed.

  In the illustrated embodiment, the jacket structure 2 is fixed to the seabed or riverbed by a plurality of pin piles (not shown in FIG. 1) positioned and installed by a plurality of support leg units 5.

  In other words, the support leg unit 5 essentially provides a firm support for the jacket structure 2 for two purposes, ie during the initial installation of the jacket structure 2, ie during its positioning and fixing operations. The first purpose is to play the role of the second, and the second purpose is to facilitate the insertion of the pin pile.

  For the purpose of positioning and fixing the jacket structure 2 in the installation operation, the upper part of the jacket structure is attached to the temporary upper structure 12 and the upper structure 12 is positioned above the water level WL.

  The upper structure 12 can carry lifting and positioning means, such as a crane 13 or the like, for handling pin piles and other elements required during the positioning and fixing phase of the support structure 2. The other elements mentioned above are the various elements of the device associated with drilling rigs, pile drives, drilling and pin pile positioning and lowering.

  The upper structure 12 can also hold any additional weights 14, which are considered necessary to hold the jacket structure 2 in its required position during its installation. This ensures that the friction of the jacket structure 2 with the seabed or riverbed SB during installation is effectively maintained to prevent the jacket structure from moving under the influence of water currents, waves and / or winds.

  With regard to the positioning and fixing of the jacket structure 2, a further important feature shown in FIG. FIG. 1 shows a working conductor tube 15, which is positioned by a crane 13 to engage the top of the inner tube 5 </ b> A of one support leg unit 5. This conductor tube 15 is clamped or held in place at the top of the inner tube 5A to provide guidance and protection during drill pin pile installation and grouting as will be described later with the help of the other figures of the drawing. Has been to be.

  Generally, in practice, a wire attached to the top of the inner tube 5A of the support leg unit 5 of the jacket assembly 2 and screwed through a pair of “eyebolts” (not shown) near the base of the conductor tube 15. It is important to note that the conductor tube 15 is lowered and guided in place by a cable (not shown). In this way, the wire cable guides the conductor tube 15 precisely in place.

  The mechanism for making such adjustments will be described in more detail later, but is not necessarily located as shown in the drawings of the present application. It should be noted that the jacket structure 2 can attach or carry other forms of structures different from the structure shown. For example, a lattice frame or multiple vertical struts.

  Reference is now made to FIGS. 2a-2d. These FIGS. 2a to 2d show the construction of the support leg unit 5 in greater detail.

  More specifically, these FIGS. 2a-2d show that after the jacket structure 2 (support structure 1) has been lowered to the seabed (or riverbed) SB by a crane-barge or other transport vessel, as described above, It is shown that an adjustable support leg unit 5 can be used to level this jacket structure 2. In the embodiment used to illustrate the principle implemented, it can be seen that two hydraulic rams or jacks 16 are provided on each support leg unit 5, these rams or jacks 16 being engaged legs. It can be actuated together or separately from above the water surface to raise or lower 7 or to tilt the engagement leg 7 at a predetermined angle.

  Figures 2a-2d show how both vertical and angular adjustments can be made and then these adjustments can be fixed by pressurizing the ram or jack 16. The upper end 17 of the ram or jack 16 is pivotally connected to a bracket 18 attached to the outer tube 5B of the associated support leg unit 5 and the lower end 19 of the ram or jack 16 is associated with the associated support leg unit 5. It is pivotally connected to the engaging leg 7 connected to the inner pipe 5A.

  As can be seen from FIGS. 2a and 2b, different actuations of the ram or jack 16 cause the engagement legs 7 of the associated support leg unit 5 to be tilted appropriately. This inclination is indicated by an inclination angle display arrow TA.

  As can be seen from FIGS. 2 c and 2 d, the ram or jack 16 can be actuated to raise or lower the engagement leg 7 of the support leg unit 5 with respect to the rest of the support leg unit 5. This vertical adjustment is indicated by the arrow VA.

  Tilt can be combined with height adjustment, which is possible due to the configuration of the support leg assembly.

  In practice, other forms of adjustment devices can be used, such as screw jacks (actuated by electricity or hydraulic pressure), inflatable bags (inflated by liquid or gas), and the like. That is, any appropriate device that can actually apply the necessary force can be used. If necessary, more than one ram or jack 16 can be provided to share the load. The lifting or jacking device is only required to function during the installation work of the support structure, after which it is left (ie, discarded) or reused in other projects. Are collected.

  Reference is now made to FIGS. 3a and 3b. These FIGS. 3a and 3b show how, unlike the case of FIGS. 2a-2d, the adjustable support leg unit 5 need not necessarily be located concentrically with the footing 5D of the jacket assembly 2. . As can be seen from FIGS. 3a and 3b, the support leg unit 5 can be attached to a footing 5D provided within the width of the support leg assembly 4 as shown in FIG. It can be attached to the outer outrigger of the support leg unit 5 as shown in 3b. The former configuration is considered more economical in terms of materials, whereas the latter configuration is perhaps more stable as a structure. By placing the adjustable support leg unit 5 away from the footing 5D of the jacket assembly 2, more space is available for drilling and pin pile installation, and this arrangement simplifies the footing configuration.

  In the embodiment shown in FIGS. 3a and 3b, the support leg unit 5 is adapted to the configuration of FIG. 1 (two tubes 5A and 5B form a footing for the support structure and receive the conductor tube 15). It will be recognized that it is more effective overall. In the case of the embodiment of FIGS. 3a and 3b, each footing 5D consists of an inner element 5E depending from the associated horizontal bar 8 and an outer tubular element 5F concentric with this inner element 5E.

  Reference is now made to FIGS. These FIGS. 4 to 10 show successive steps of fixing the jacket support structure 2 shown in FIGS. 1 to 3b described above by means of pin piles. Specifically, FIG. 4 shows the first stage of the operation of permanently fixing the jacket footing to the seabed (or riverbed) SB. FIG. 4 shows an example of an embodiment in which the adjustable support leg unit 5 is concentric with the footing 5B of the support structure 2. As mentioned above, it should be noted that the adjustable support leg unit 5 can also be used away from the jacket assembly 2.

  More specifically, FIG. 4 shows that the conductor tube 15 is lowered in the inner tube 5A of the tubular structure of the jacket leg unit 5 until the lower end of the conductor tube 15 is placed on the seabed (or riverbed) SB. Indicates. In this position, immediately the conductor tube 15 is clamped at its upper end (not shown in FIG. 4) to the temporary upper structure 12 (not shown in FIG. 4; see FIG. 1). .

  FIG. 5 shows how the drill string 21 is lowered through the conductor tube 15 positioned as described above and attached to the upper structure 12 installed above the conductor tube 15 (FIGS. 1 and (It is not shown in FIG. 5). Usually, a rotary drill 22 is used. However, if the ground condition of the seabed or riverbed is appropriate, a pile (not shown) can be driven through the conductor pipe 15 into the seabed SB. A hammer (not shown) can be lowered through the conductor tube 15. Drilling debris resulting from such operations can be flushed with water by using water sent by a pump (not shown) through the drill string.

  FIG. 6 shows how the pin pile 23 suspended on the cable 24 can be lowered through the conductor tube 15 after the drilling operation is completed. The cable 24 carries a grout hose, which is not shown, but is necessary for the next operation described later.

  The cementitious grout can be pumped through a grout hose (not shown) attached to the pin pile 23. Grout hoses are formed by drilling between the pin pile and the drilled seabed by guiding cementitious material through a plurality of holes (not shown) into the pin pile and emerging from the base of the pin pile. Fill concentric voids with grout filling. As shown at 25 in FIG. 7, a sufficient amount of grout is pumped into the cavity to completely fill the cavity to the level of the seabed SB.

  Completion of this grout filling operation can be verified using one or more sensors provided at the sea floor level, which or these sensors respond to the appearance of the grout from below.

  FIG. 8 shows that after the grout injected through the pin pile has formed the grout filling 25, the conductor tube 15 has a small amount sufficient to hold the conductor tube 15 in place regardless of water flow or waves. It shows that the conductor tube 15 has been raised a short distance until it is engaged with the inner tube 5A. In FIG. 8, the lower end of the conductor tube 15 is indicated by reference numeral 26. This small amount can be on the order of 200 or 300 mm, but other amount levels of engagement can be used to suit the situation.

  FIG. 9 shows how more grout can then be injected through a grout hose connected to a hole (not shown) in the top portion of the pin pile, or pin pile 23 and jacket leg unit. It is shown whether it can inject | pour into the annular space between the inside of 5 inner pipe | tube 5A. This annular cavity is filled with the cementitious grout 26 until the cementitious grout 26 reaches the level of the base of the conductor tube 15. This height level can be calculated from the amount of grout required to fill a space of known dimensions, or can be used to detect when the sensor has reached the correct height level. .

  The grout hose and the descending cable 24 are then separated from the pin pile 23 and raised back to the top structure or workbench 12 at the top of the support structure. The grout hose and cable can be removed by various means not shown. For example, the coupling can be split and held together by a pin, which can be pulled out by pulling the cable from above the sea level or by operating an electric solenoid by a diver. Remotely operated vehicles (ROVs) can also be used for removal. In addition, there are a number of devices that are specifically designed to allow the cables and hoses to be removed remotely, and these devices can be used for this purpose.

  FIG. 10 shows the completed footing after the conductor tube 15, all cables and hoses have been removed. It can be seen that the pin pile 23 is firmly grouted to both the ground and the footing and provides a means to support very large shear or lift pressure between the support structure and the seabed. The surface area of the pin pile is designed to be sufficient to support the load at a sufficiently low stress level to prevent grout delamination.

  At this stage, the adjustable engagement legs 7 can be left in the field or the engagement legs 7 can be removed for reuse. Finally, the temporary upper structure 12, crane 13, equipment associated with crane 13, conductor tube 15 and any other tools, together with blast 14 added for stability during drilling, are equipped with a crane. It can be removed by the ship that is. A ship that is smaller and less expensive than the ship required to install the entire jacket assembly 2 in place can be used for this purpose. This second ship may also be equipped with other equipment needed for completion of the installation, such as a wind or tidal turbine, on the surface housing or deck. Alternatively, if the entire jacket assembly 2 needs to be submerged, the removable upper portion can be removed at this stage or replaced with a specialized device.

  From the above description, an object of the present invention is a structure that can be installed in the sea (or in the river), and can be temporarily self-standing with a weight sufficient to hold it in place by friction with the seabed. Permanently on the seabed (or riverbed) by using pin piles or other fixing means that can be thrust into the seabed (or riverbed) through a tubular permanent footing that is designed to be attached integrally to the jacket structure It will be appreciated that it is to provide a structure having equipment to support the devices that are required to be secured to. If necessary, an additional weight that creates enough friction to prevent movement can be temporarily provided as an additional ballast to the structure, which is removed after the pin pile installation is complete. .

  Therefore, according to the present invention, there is one or more tubular permanent footings capable of drilling a seabed or riverbed from a platform mounted above the water surface, and a pin pile is inserted into the permanent footings. A structure with a jacketed base that can be grouted in place is provided.

  More particularly, the structure includes a temporary footing that can be adjusted in height and alignment so that the structure can be leveled before the structure is secured to the seabed. The force to make such adjustments is provided by a hydraulic jack, screw jack or any other suitable device.

Claims (15)

  In the method of installing the support structure (1) which is required to be installed on the seabed or riverbed, before performing the work required to permanently fix the support structure on the seabed or riverbed and these Building the support structure such that it can temporarily stand upright on the seabed or riverbed during the operation.   2. The method according to claim 1, wherein the support structure is in the form of an elongated strut (2) for supporting a submergible water-driven turbine and / or wind-driven turbine.   3. The method according to claim 1, further comprising the step of anchoring said support structure (1) on the seabed or riverbed by means of piles or similar anchoring means (23).   4. The method according to claim 3, wherein the support structure (1) includes a plurality of anchor positions (4) cooperating with a plurality of support structure support leg units (5), each of the support leg units (5). The anchor pile or the same kind of means (23) for the support structure is received and installed, and the anchor pile or the same kind of means (23) is supported by the support structure (1) and the anchor pile or the same kind of means ( 23) A method in which water is submerged on the seabed or riverbed by means capable of handling and submerging.   5. The method according to claim 4, wherein each of said support leg units (5) can set said support structure (1) at the height level and orientation required with respect to the seabed or riverbed (SB). A method whose position is adjustable with respect to SB).   6. The method according to claim 5, wherein the support structure (1) is designed to be lowered to the seabed or riverbed (SB) and leveled by adjusting means (7, 16). Means (7, 16) adjust the position of each independent seabed or riverbed engaging leg (7) before submergence of the associated anchor pile (23), resulting in an uneven shape of the seabed or riverbed (SB). A method that can be adapted.   The method according to claim 5 or 6, wherein each independent anchor pile (23) is grouted with cementitious material at a position where each independent anchor pile (23) is inserted into the seabed or riverbed (SB). A method comprising the step of fixing.   The method according to any one of claims 4 to 7, comprising the step of providing a temporary structure (12) on top of the support structure (1), wherein the anchor is at the temporary structure (12). A method in which the work required to submerge the pile (23) is performed.   2. The method according to claim 1, wherein the support structure (1) is being installed while the support structure (1) is being moved by water flow, waves or wind to maintain the installation period of its installation. Adding an additional weight to the support structure (1) when there is a risk of insufficient frictional contact with the seabed or riverbed (SB) at   10. The method according to claim 9, comprising the step of removing said additional weight together with a device attached for installation of said support structure (1) after fixing said anchor pile (23). A method in which the support structure can no longer move with respect to the seabed or riverbed (SB).   In the support structure (1) that can be installed on the seabed or riverbed (SB), the seabed or riverbed is sufficiently heavy to hold the support structure (1) in place by frictional contact with the seabed or riverbed (SB) (SB) a plurality of anchor positions configured to be sufficiently heavy to temporarily stand on top and cooperate with a plurality of position adjustable seabed or riverbed engaging support leg units (15) (4), wherein each of the support leg units (5) receives and installs an anchor pile (23) for a support structure, and the anchor pile (23) is supported by the support structure and the anchor pile. A support structure characterized in that it is submerged on the seabed or riverbed (SB) by means of handling and submerging (23).   12. Support structure (1) according to claim 11, characterized in that it is in the form of elongated struts (2) for supporting a submergible turbine.   13. Support structure (1) according to claim 11 or 12, comprising a temporary additional structure (12) provided on top of the support structure (1) for submerging said pile (23). A support structure characterized in that the temporary additional structure (12) is provided with equipment for performing the required work.   14. The support structure (1) according to claim 13, wherein the temporary structure (12) can carry an additional weight, whereby the support structure (1) during installation is installed. In order to maintain sufficient friction with the seabed or riverbed (SB) during operation, an appropriate additional weight is placed on the temporary structure (12) if it is dangerous to be moved by water currents, waves or winds. In addition to the above, it is possible to maintain the allowable friction with the seabed or the riverbed (SB) of the support structure.   12. Support structure (1) according to claim 11, comprising a temporary footing (7, 16), wherein said temporary footing (7, 16) brings said support structure (1) to the seabed or riverbed (SB). The height and alignment can be adjusted so that the support structure (1) can be leveled before fixing, and the force to make such adjustment is hydraulic jack, screw jack or any A support structure characterized by being provided by other similar means.

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