CN102575450A

CN102575450A - Supporting foundation for a marine current turbine, and related underwater device and installation method

Info

Publication number: CN102575450A
Application number: CN2010800461328A
Authority: CN
Inventors: A·吕皮
Original assignee: Technip France SAS
Current assignee: Technip Energies France SAS
Priority date: 2009-08-28
Filing date: 2010-08-26
Publication date: 2012-07-11
Anticipated expiration: 2030-08-26
Also published as: WO2011023907A1; CN102575450B; FR2949482A1; US20120282037A1; EP2470723A1; BR112012004336A2; KR20120092564A; FR2949482B1

Abstract

The invention relates to a supporting foundation (20) including a base (50), a marine current turbine carrier (54) supported by the base (50), and at least three legs (52) for bearing on the floor of the body of water (14), connected together by means of the base (50). Each bearing leg (52) comprises a hollow casing (70), and a rigid member (72) for adjusting the vertical position of the hollow casing (70) relative to the floor (12) of the body of water. The rigid adjustment member (72) is immobilized so as to vertically project under the casing (70). Each bearing leg (52) further includes a member (74) for engaging with the floor of the body of water (14) and rigidly connected to the lower end of the rigid adjustment member (72).

Description

Be used for the brace foundation of hydroelectric generator, relevant underwater units and with regard to method for position

Technical field

The present invention relates to a kind of brace foundation that is used for hydroelectric generator, be used to be placed on the bottom of water body, said brace foundation comprises:

-base;

-hydroelectric generator the bearing that carries by base;

-being supported at least three spikes on the bottom of water body, said at least three spikes connect mutually through base, and each supports spike and comprises a hollow caisson.

Background technology

This type brace foundation is used to place the bottom that is supported on water body, in said water body, has current or ocean current.

For example this water body can be deep-sea or shallow sea, and in this case, current or ocean current result from morning and evening tides or wave especially.As modification, water body is river or water channel, in this water body, and mobile current or the ocean current of causing between water body source and the river mouth particularly.

Brace foundation carries and is fixed on the bottom of water body, and hydroelectric generator comprises turbine and generator.Hydroelectric generator can be accepted to produce the water ability from current, and can convert water into rotating mechanical energy by turbine, converts mechanical energy into electric energy by generator then.

Because can be applied to the potent of current on the hydroelectric generator, it is very important that brace foundation is held in place hydroelectric generator very securely, keep the direction of hydroelectric generator as far as possible simultaneously, so that optimize its generating on the bottom of water body.

In order to guarantee the good stability of hydroelectric generator, known use tripod type brace foundation is for example described in WO 2008/110811 and EP 1992741.

These brace foundations comprise that center base and three of a carrying hydroelectric generator are used for being deep into the vertical spike of the bottom of water body.

Each spike comprises the caisson that opens wide downwards, in case brace foundation is placed on this bottom, caisson just is deep in the bottom of water body.

In WO 2008/110811, caisson is in addition by ballast, so that brace foundation is stabilized on the bottom of water body.

The bottom that this type brace foundation is suitable for substantially flat well and has enough hardness, too big to prevent that brace foundation from going deep into the bottom of water body.

If the bottom of water body is not smooth, then need prepare the bottom of water body, guarantee certain planeness simultaneously, and guarantee that the bottom is not too loose.

This is avoided brace foundation to be deep into underground with uncontrollable mode and guarantees the direction of hydroelectric generator in horizontal plane and perpendicular.

This ready-to-consume time and the jumbo of the bottom of water body are because need employ specially ground works ship under water.

The objective of the invention is to obtain especially to have with the seabed simple, that inexpensive manner is arranged in any kind convexity and/the hydroelectric generator brace foundation in the seabed in loose zone.

Goal of the invention

For this reason, the objective of the invention is to a kind of brace foundation of the above-mentioned type, it is characterized in that each supports spike and comprises in addition:

* regulate the rigidity of vertical position of the bottom of the relative water body of caisson and regulate parts, it is vertically fixed highlightedly under caisson that said rigidity is regulated parts;

* the cooperation parts that cooperate with the bottom of water body, said cooperation parts are connected with the lower end that rigidity is regulated parts.

Can comprise following one or several independent employing or the characteristic that adopts according to any possibility technical combinations according to brace foundation of the present invention:

-at least two regulate parts have caisson and join and parts between the differing heights that adopts;

-each regulates parts and comprises an extensible element, and caisson is deployable to the bottom of water body relatively said deployable elements is installed on the bottom of water body at brace foundation before;

-each regulates the retaining element that parts comprise that relative caisson is fixing, be installed on the bottom of water body at brace foundation before, deployable elements relative fixed element is movable to be installed, retaining element and deployable elements are particularly formed by telescoping tube;

-each caisson comprises a diapire and a sidewall at least, and said diapire and sidewall limit space in, and said interior space can filling be used to guarantee that brace foundation can float over the gas on the water body;

-caisson comprises the upper wall in space in the upwards shutoff, caisson comprise fluid injected in space/or at least one hole that fluid is discharged from interior space;

The sidewall top is for good and all upwards led in-Nei space;

-cooperate one of parts to limit the cavity that opens wide downwards, be used for being inserted into the bottom of water body;

-cavity is limited a hollow body, and said hollow body opens wide and have the upper wall of the shutoff cavity that makes progress downwards;

-cooperate one of parts to comprise solid fully particularly protruding soffit, cooperate parts to enter into the bottom of water body so that stop.

The present invention also aims to a kind of underwater power generation device, it is characterized in that, said underwater power generation device comprises:

-as above defined brace foundation;

-be installed in the hydroelectric generator on the hydroelectric generator bearing.

Target of the present invention also is a kind of as above brace foundation method in place of definition that makes, and this method may further comprise the steps:

-will at least partially in the brace foundation on the surface of water body transportation up to the bottom of brace foundation at water body on the relative place of put area;

-all be immersed in brace foundation in the water body;

-arrange that the spike of brace foundation is supported on the put area, each cooperates parts to contact with water bottom.

Method of the present invention can comprise following one or several independent employing or the characteristic that adopts according to any possibility technical combinations:

-this method comprises regulates the regulating step that each rigidity is regulated parts outstanding height under caisson, is to make each rigidity regulate the fixed fixing step of the relative caisson of parts then.

The regulating step that each rigidity of-adjusting is regulated parts outstanding height under caisson carried out before brace foundation is immersed in water body fully.

-through being immersed in, brace foundation retaining part under it self buoyancy function realizes transporting step in the water body.

Description of drawings

Below reading, provide as an example and will understand the present invention better with reference to the description that accompanying drawing carries out, in the accompanying drawing:

-Fig. 1 is the part exploded top perspective view that comprises first TRT of the brace foundation of the present invention that is placed on water bottom;

-Fig. 2 is the lateral view of the device of Fig. 1;

-Fig. 3 similarly schemes with Fig. 2 before device is installed in water bottom;

-Fig. 4 is the sectional drawing along the middle perpendicular of a spike of the brace foundation of Fig. 1;

-Fig. 5-the 9th, similarly the scheming of the modification of the spike of brace foundation of the present invention with Fig. 4;

-Figure 10 is can be by the elevation of the hydroelectric generator of the brace foundation of Fig. 1 carrying;

-Figure 11 is can be by 3/4ths phantom drawing of another hydroelectric generator of the brace foundation of Fig. 1 carrying;

-Figure 12 is that ship and brace foundation of the present invention first the lateral view during with regard to the first step of method for position at brace foundation of the present invention is placed in expression;

-Figure 13 is at first similarly the scheming with Figure 12 during with regard to second step of method for position;

-Figure 14 places ship and brace foundation at of the present invention second the lateral view during with regard to the first step of method for position;

-Figure 15 is at second similarly the scheming with Figure 14 during with regard to second step of method for position; With

-Figure 16 is at second similarly the scheming with Figure 14 during with regard to the third step of method for position.

The specific embodiment

The first underwater power generation device 10 according to the present invention is shown in Fig. 1-4.

This device 10 is used to be placed on the bottom 12 of water body 14, so that current that from water body 14, exist or ocean current produce electric energy.

Water body 14 for example is the salt solution water body with current or ocean current, like deep-sea or shallow sea, or the fresh water water body that flows, like river or river.

The minimum-depth of water body 14 in the zone of apparatus for placing 10 be greater than 5m, and generally at 20m between the 60m.

The bottom 12 of water body is limited solid material such as rock or deposit.The bottom has upper surface, and in instance shown in Figure 2, upper surface is furnished with scraggly surface, as extends to step (marche) 16A, 16B, 16C apart from the surperficial different depth of water body 14.

The bottom 12 of water body 14 can have the zone of comparing harder relatively zone and relatively loosening with underwater units 10 in addition.

Underwater units 10 is immersed in below the surface of water body 14 fully.Underwater units comprises that the brace foundation 20 on the bottom 12 that is fixedly supported on water body 14 is installed in the hydroelectric generator 22 on the brace foundation 20 with outstanding, is called " hydroelectric turbine " sometimes.

Known ground, hydroelectric generator 22 comprise through fixed terminal 26 and are fixed on the Base body 24 on the brace foundation 20.

Hydroelectric generator comprises water turbine 28, and turbine is around the axis A-A of basic horizontal ' be rotatably installed on the Base body 24, so that be converted into rotating mechanical energy to the hydraulic energy that has in the water body 14.

Hydroelectric generator 22 comprises the generator 30 that can convert the mechanical energy that turbine 28 rotations produce into electric energy in addition.

In the instance of hydroelectric generator shown in Figure 10 22, Base body 24 comprises and can guide current the radome fairing 32 of turbine 28 into and be arranged in the turbine bearing 34 in the radome fairing 32 along its rotation A-A '.

Turbine 28 comprises around axis A-A ' be rotatably installed in the wheel hub 36 in the turbine bearing 34 and radially be projected into a plurality of blades 38 the radome fairing 24 from wheel hub 36.

In the modification of hydroelectric generator shown in Figure 11 22, Base body 24 does not have radome fairing, and turbine 28 is installed in an end of turbine bearing 34.

Still in modification, the rotation A-A ' of turbine 28 is vertical.

In instance shown in Figure 1, fixed terminal 26 comprises the middle leader 42 of the top 40 of the basic cylindricality of bearing base main body (corps de base) 24, downward contraction shape and is used for being inserted in the bottom 44 of the basic cylindricality of brace foundation 20.

Bottom 44 lateral dimension vertical with vertical axis is less than the lateral dimension on top 40.

44 bus comprises vertical guiding rib 46 to fixed terminal 26 along the bottom, like what below will see, is used for hydroelectric generator 22 angled ground marks at brace foundation 20.

In the instance shown in the figure, hydroelectric generator 22 is installed on the brace foundation 20 removably, so that can rise to the surface of water body 14 again, regularly safeguarding, and brace foundation 20 is risen again.As modification, hydroelectric generator 22 for good and all is fixed on the brace foundation 20.

With reference to Fig. 1-4; Brace foundation 20 comprises a hollow out base 50, at least three basic vertical spikes 52 and the hydroelectric generator bearing 54 that is carried by base 50; Said at least three basic vertical spikes are supported on the bottom 12 of water body 14, connect mutually through base 50.

In instance shown in Figure 1, the exterior contour of base 50 is polygon basically, and spike 52 is positioned at place, polygonal summit.

Or rather, the shape of base 50 advantageously is equilateral triangle or isosceles triangle, and brace foundation 20 has three spikes that are positioned at the summit of base 50.

As modification, the quantity of spike 52 is greater than three, with the stability of further increase brace foundation 20.

Base 50 by a plurality of framework 60A that hydroelectric generator bearing (support d ' hydrolienne) 54 is connected with each spike 52 with each spike 52 is formed with a plurality of framework 60B that two adjacent spikes 52 are connected.

Therefore, in instance shown in Figure 1, base 50 comprises that at least two make tilt frame 60A that bearing 54 is connected with each spike 52 and at least two framework 60B that make the basic horizontal that a spike 52 is connected with adjacent spike 52.

Form some water flow space between framework 60A, the 60B, to minimize the resistance of 20 pairs of current of brace foundation or ocean current.

According to the present invention; Each spike 52 comprises hollow caisson 70, regulate caisson 70 relative water bodys bottom 12 vertical position adjusting parts 72 be positioned at regulate parts 72 lower ends and with the bottom 12 cooperation parts 74 that cooperate with the bottom 12 of water body 14 that contact, the adjusting parts are attached on the caisson 70 so that under caisson 70, vertically give prominence to.

Each spike 52 comprises being articulated in addition to be dropped to brace foundation 20 to articulate element 76 on the decline hawser in the water body 14.

As shown in Figure 4; In limiting, each caisson 70 floats and ballast space 78; Be used for by the filling of gas-selectively ground; So that when it transports, guarantee the floatability of brace foundation 20 and by solid or the optionally filling of liquid ballast thing, to guarantee the stability on the bottom 12 of brace foundation 20 at water body 14 after placing brace foundation.

Each caisson 70 be shaped as basic cylindricality with vertical axis B-B '.Therefore caisson comprises diapire 80, circumferential side wall 82 and upper wall 84, and

wall

80,82,84 is at inner restriceted envelope 78.

For example, the interior space of each caisson 70 is at 300m ³To 500m ³Between.

Caisson 70 comprises in addition liquid or solid is injected into injection hole (piquage) 85A and the drain 85B in the space 78 in space 78 in leading on injection hole 85A in the space 78.

Hole

85A, 85B have valve, are used for selective blocking and fill between clearancen 78.

Regulating parts 72 is fixed on the caisson 70.

Maximum size on the horizontal direction of adjusting parts in Fig. 2 is less than the smallest lateral dimension of caisson 70.

In this example; Space 78 was fixedly mounted on first tubular element 86 and following tubular element 88 in the caisson 70 in parts 72 were included in and pass between lower wall 80 and the upper wall 84; Install before the brace foundation 20 or when installing; Following tubular element can launch from retaining element 86, to regulate the vertical position of caisson 70 on water bottom 12.

In this example, retaining element 86 is formed by the telescoping tube of installing that slides over each other along vertical axis with moving element 88.

Deployable elements 88 can relative fixed element 86 in caisson 70 shown in Figure 3 punctured position and between a plurality of expanded positions on the selected height under the caisson 70, move so that be projected into downwards beyond the caisson 70.

When brace foundation 20 is installed, deployable elements 88 at the selected expanded position of relative fixed element 86 and caisson 70 relatively temporarily or for good and all fixed so that caisson 70 remained on the selected vertical position of the bottom 12 of relative water body.

For example, this vertical position at 0.5m on the bottom 12 between the 5m.

For example through weld, screw, riveted joint or plastic strain guarantee that retaining element 86 relative deployable elements 88 are fixed.

On different spikes 52, exist to regulate parts 72 can be according to the relative depth adjustment of bottom 12 and spike 52 each regulate parts 72 lower wall 80 with cooperate the height of under caisson 70, giving prominence between the parts 74.

Therefore, regardless of the landform of the bottom 12 of water body 14, caisson 70 can remain on selected vertical position basically with their diapire 80, makes base 50 and bearing 56 in horizontal plane and perpendicular, have definite direction.

In instance shown in the drawings, base 50 basic maintenance levels, caisson 70 all is positioned at the surperficial identical degree of depth of relative water body 14 basically.

For this reason, as shown in Figure 2, it is can a spike 52 different with another spike to regulate the projecting height of parts 72 between caisson 70 and cooperation parts 74.For example this highly can be 1/10 to 1 times of height of caisson 70.

Therefore, brace foundation 20 comprises that at least two are regulated parts 72, and said at least two adjusting parts have different height under their caisson 70.

Cooperate parts 74 to regulate the maximum transverse size of parts 72 greater than rigidity in the maximum transverse size of the horizontal direction of Fig. 2.

In the instance shown in Fig. 1-4, cooperate parts 74 to form by the backing plate 90 that is fixed on the lower end of regulating parts 72.

Backing plate 90 is arranged and is supported on the water bottom 12.Backing plate has the solid and protruding soffit 92 to lower convexity, is deep in the bottom 12, if especially loosen in this bottom 12 so that stop or limit spike 52 at least.

In modification shown in Figure 5, backing plate 90 is formed by the cone of pointed end, and cone limits solid soffit 92.This taper backing plate 90 is particularly suited for the bottom 12 that a large amount of rocks 94 constitute or comprise a large amount of rocks.

In the modification shown in Fig. 6 and 7, cooperate parts 74 to form by the hollow body under turning to 94, this hollow body limits the cavity 96 of accepting bottom 12.

Cavity 96 is opened downwards, and container 94 can be deep in the bottom 12.In instance shown in Figure 6, container 94 highly advantageous less relatively is for example less than the height of caisson 70.

In addition, the opposite position that limits the space 98 that the hollow wall of container 94 limits between container 94 and bottom 12 in cavity 96 is solid.

In modification shown in Figure 7, container 94 comprises hole 100, and the upper area that the hollow wall that forms container 94 is passed in the hole leads to space 98.Hole 100 is used for being connected with pump, so that the fluid that exists in the suction space 98 and container 94 is deep in the bottom 12, this forms suction anchor.

Container 94 then highly advantageous greater than the height of caisson 70.

In modification shown in Figure 8, cooperate parts 74 to form by cement block 102, cement passes tubular element 86 and injects with following tubular element 88, and the end of following tubular element 88 enters into the bottom 12 of water body 14 in advance through boring.Cement block 102 is extending around the tubular element 88 down between its lower end and water body 14.

Therefore, according to the heterogeneity that forms the soil relative, use with spike 52 following soil properties adapt to cooperate parts 74 with spike 52.

Therefore, brace foundation 20 can comprise spike 52, and said spike has the cooperation parts 74 of different structure.Can guarantee the stability of good stability, the especially level of brace foundation 20 on the bottom 12 of water body 14 like this.

In modification shown in Figure 9, caisson 70 is open upwards along the top edge of sidewall 82.Therefore there is not the upper wall 84 on sidewall 82.Interior space 78 can be through opening fill liquid or the Solid Ballast thing that is positioned at the caisson 70 on the sidewall 82.

With reference to Fig. 1, hydroelectric generator bearing 54 comprises basic hood 110 for cylindricality and is inserted into being used in the hood 110 and guides the guide sleeve 112 of fixed terminal 26.

Hood 110 is formed by the hollow wall of upwards opening.Hollow wall extends along hood axis C-C ', and in this instance, axis C-C ' is vertical and near the center of gravity of base 50, passes through basically.

The framework 60A that connects bearing 54 and each spike 52 is fixed on the external surface of hood 110, around the hood axis, distributes simultaneously angledly.

Guide sleeve 112 is arranged in the hood 110.It comprises the lower area 114 and upper area 116 of the bottom 44 that is used to accept terminal 26, and upper area upwards disperses so that the middle contraction section of the terminal 26 that reclines.

Sleeve 112 limits the vertical slit 118 of accepting mark rib (nervure d ' indexation) 46 in addition, and upwards open through the cavity 120 of dispersing of rib 46 being guided into slit 118 in slit 118.

The cylindricality center cavity that the cross section that lower area 114 limits cross section and bottom 44 matches basically.

Upper area 116 also limits the center cavity of upwards dispersing, and the shape complementarity of shape and mid portion 42.

Lower area 114 is passed in slit 118 and part is passed upper area 116 extensions.The width of the width in slit and rib 46 matches so that when rib 46 is received in the slit 118, stop terminal 26 to rotate around axis C-C '.

Dispersing cavity 120 is located in the upper area 116 in the upper end in slit 118.

When hydroelectric generator 22 is fixed on 20 last times of brace foundation, terminal 26 part has entered into hood 110.Bottom 44 is contained in the lower area 114 and mid portion 42 is placed on the upper area 116.

Rib 46 is fixed angledly in slit 118, guarantees that simultaneously hydroelectric generator 22 is centering on the axis C-C ' angle mark of allocation really.

Make according in place first the illustrating by Figure 12 and 13 of TRT of the present invention 10 with regard to method for position.

Implement this method by having crane gear 132 like the placement ship 130 of crane.Crane 132 has can make device 10 drop to the deployable hawser 133 in the water body 14.

This method comprises the transportation step, this transportation step on the surface of water body 14 with brace foundation 20 transportations up to the place relative with the put area of the bottom 12 that this basis is placed into water body 14 134.

This method comprises and being used for brace foundation 20 from placing ship 130 and be immersed in the step of water body 14 fully and being used to make brace foundation 20 to be supported on the step on the bottom 12 of water body 14 then.

During beginning,, brace foundation 20 is loaded on the ship 130 in the transportation step.As shown in Figure 3, the adjusting parts 72 of spike 52 are retracted in the caisson 70, make that the vertical space of brace foundation 20 is minimum.

For this reason, following tubular element 88 remains on the punctured position in the tubular element 86.Cooperate parts 74 to remain close to caisson 70.

In first modification of this method, before brace foundation 20 is in place, confirm the landform of put area 134.

Therefore, each regulates the height that parts 72 are given prominence under caisson 70 to each spike calculating according to the landform of confirming, so that base 50 is remained on the bottom 12 of water body 14 in the direction that relative perpendicular and relative horizontal plane are confirmed.

Then, launch to regulate parts 72 at the water surface, regulate their height according to the height value that each spike 52 is calculated for each spike 52.

Then, through tubular element 88 being fixed on the tubular element 86 really on the take the altitude for example placing welding or plastic strain on the ship 130 on the surface of water body.

Then, make to activate hawser 133 and be fixed on and articulate on the parts 76, and handle crane 132,, and relatively be placed on brace foundation on the water body 14 with put area 134 or part is immersed in the water body so that take out brace foundation 20 outside ship 130.

Make a selected amount of solid and/or liquid ballast thing enter into the interior space 78 of each caisson 70 then and make brace foundation 20 drop to water body 14.

In instance shown in Figure 12, hydroelectric generator 22 is installed on its bearing 54 in advance, makes fixed terminal 26 enter into hood 110 as previously mentioned simultaneously.

As modification, brace foundation 20 descends and is placed on the bottom 12 before hydroelectric generator 22, and hydroelectric generator 22 drops in the water body 14 after brace foundation 20 has been arranged on the bottom 12 then.

Then, immersing step, brace foundation 20 is immersed in the water body 14 fully, drops to zone 134 then, is suspended on simultaneously on the hawser 133, cooperates parts 74 to contact with the bottom 12 of water body so that make.

Since to each spike 52 exist the adjusting parts 72 of enough height and the cooperation parts of selecting in advance 74 with adapt to constitute bottom the character of 12 soil, brace foundation 20 is positioned on the bottom 12 of water body 14 with very accurate and firm mode.

Need not carry out big ground works and just can obtain this point through implementing very simple laying method.

Therefore place the cost reduction of brace foundation 20 and device 10 and be convenient to place operation.

Then hawser 133 with articulate that parts 76 break away from and rise again to placing ship 130.Then hydroelectric generator 22 can move and under the effect of the rotation of turbine 28, produce electric energy through generator 30.

In the modification of this method, brace foundation 20 descends, and keeps regulating parts 72 simultaneously and shrinks.

Then, when brace foundation 20 arrived select locations and at least one spike 52 and leaves bottom 12 certain distances of water body, following tubular element 88 discharged, so that launch to the bottom 12 of water body, up to cooperating parts 74 to begin to contact with bottom 12.

When the location of brace foundation 20 is satisfactory, for example lower element 88 relative upper elements 86 are fixed, and hawser 133 rise again through plastic strain.

Be shown in Figure 14-16 according to of the present invention second with regard to method for position.

Different with first method shown in Figure 12 and 13, the interior space filling of the caisson 70 that floats is a certain amount of to be enough to the gas that guarantees that brace foundation 20 is enough unsteady, so that brace foundation retaining part under it self buoyancy is immersed on the surface of water body 14.

Shown in figure 14, when hydroelectric generator 22 initial supported basic 20 carried, this self buoyancy also was enough to make hydroelectric generator 22 to remain on the surface of water body.

In transportation step shown in Figure 14, place 130 in ships by towing cable 140 and part is immersed in brace foundation 20 in the water body 14 is dragged to the place relative with put area 134.

Therefore need not make ship 130 have the powerful crane gear 132 that can promote brace foundation 20.

Then, when brace foundation 20 arrived the aforementioned place relative with rest area 134, the unsteady hawser 142 that has the floating drum on the length that is distributed in them was articulated in each and articulates on the element 74, so that brace foundation 20 keeps horizontal level when it immerses beginning.

Open the fluid injecting hole 85A of each caisson 70,, replace at least a portion of the gas that exists in this space 78 simultaneously so that the liquid or solid ballast is injected in the interior space 78.

The buoyancy of brace foundation 20 reduces, and this causes it to be immersed near surface fully.

Shown in figure 16,130 of ships are positioned on the brace foundation 20.To be connected by the decline hawser 146 that winch launches from ship 130 then and articulate on the parts 76, and unsteady hawser 142 can with articulate parts 76 and break away from.

Then, brace foundation 20 drops to zone 134 gradually through decline hawser 146, is supported on the bottom 12 of water body so that spike 52 is arranged.

In a modification, the immersion of brace foundation 20 is only undertaken by unsteady hawser 142 with its layout on bottom 12, does not use the decline hawser 146 from ship 130.

Then, floating drum 144 immersion of control brace foundation 20 automatically through existing on the hawser 142 that floats.

Under any circumstance; As previously mentioned; If the landform in zone 134 is in advance through research; Regulating parts 72 can launch before brace foundation 20 drops in the water body 14, perhaps as modification, launched in 12 o'clock bottom also at least one spike leaves near brace foundation 120 is arranged in the zone 134 in the water body 14.

Claims

1. the brace foundation (20) that is used for hydroelectric generator (22), it is used to be placed on the bottom (12) of water body (14), and said brace foundation (20) comprising:

-base (50);

-hydroelectric generator the bearing (54) that carries by said base (50);

-being supported at least three spikes (52) on the bottom (12) of said water body, said at least three spikes connect mutually through said base (50), and each supports spike (52) and comprises a hollow caisson (70);

It is characterized in that each supports spike (52) and comprises in addition:

* regulate the rigidity of vertical position of the bottom (12) of the said relatively water body of said caisson (70) and regulate parts (72), it is vertically fixed highlightedly under said caisson that said rigidity is regulated parts (72);

* the cooperation parts (74) that cooperate with the bottom (12) of said water body, said cooperation parts are connected with the lower end that said rigidity is regulated parts (72).

2. brace foundation as claimed in claim 1 (20) is characterized in that, regulates parts (72) at least two and has at said caisson and the said differing heights that adopts between the parts (74) that cooperates.

3. according to claim 1 or claim 2 brace foundation (20); It is characterized in that; Each is regulated parts (72) and comprises a deployable elements (88), and this deployable elements said relatively caisson (70) before go up the bottom (12) that said brace foundation (20) is installed in said water body is deployable to the bottom (12) of said water body.

4. brace foundation as claimed in claim 3 (20); It is characterized in that; Each regulates the retaining element (86) that parts (72) comprise that said relatively caisson (70) is fixing; The movable installation of the said relatively retaining element of said deployable elements (88) (70) is before gone up in the bottom (12) that is installed in said water body at said brace foundation (20), and said retaining element (86) and said deployable elements (88) are particularly formed by telescoping tube.

5. like each described brace foundation (20) in the above-mentioned claim; It is characterized in that; Each caisson (70) comprises a diapire (80) and a sidewall (82) at least; Said diapire and sidewall limit space (78) in, and said interior space can filling be used to guarantee that said brace foundation (20) can float over the gas on the said water body (14).

6. brace foundation as claimed in claim 5 (20); It is characterized in that; Said caisson (70) comprises a upwards upper wall (84) in the said interior space (78) of shutoff, and said caisson (70) comprises at least one hole (85A, 85B) that fluid is injected said interior space (78) and/or said fluid is discharged from said interior space.

7. brace foundation as claimed in claim 5 (20) is characterized in that, said sidewall (82) top is for good and all upwards led in said interior space (78).

8. like each described brace foundation (20) in the above-mentioned claim, it is characterized in that at least one of said cooperation parts limits the cavity (96) that opens wide downwards, be used for being inserted in the bottom (12) of said water body.

9. brace foundation as claimed in claim 8 (20) is characterized in that, said cavity (96) is limited hollow body (94), and said hollow body opens wide downwards and has a upper wall that upwards stops up said cavity (96).

10. like each described brace foundation (20) in the above-mentioned claim; It is characterized in that; At least one of said cooperation parts (74) comprises solid fully particularly protruding soffit (92), is used for stoping said cooperation parts (74) to enter into the bottom (12) of said water body (14).

11. underwater power generation device (10) is characterized in that, said underwater power generation device comprises:

-like each described brace foundation (20) in the above-mentioned claim;

-be installed in the hydroelectric generator (22) on the hydroelectric generator bearing (54).

12. be used for making like each described brace foundation (20) of claim 1-10 method in place, it is characterized in that, said method comprising the steps of:

-will at least partially in the brace foundation on the surface of water body (14) (20) transportation up to the bottom (12) of said brace foundation (20) at water body on the relative place of put area (134);

-said brace foundation is immersed in the said water body (14) fully;

-arrange that the spike (52) of said brace foundation (20) is supported on the said put area (134), each cooperates parts (74) to contact with the bottom (12) of said water body.

13. method as claimed in claim 12; It is characterized in that; Said method comprises regulates the regulating step that each rigidity is regulated parts (72) outstanding height under caisson, is to make each rigidity regulate the fixed fixing step of parts (72) said relatively caissons (70) then.

14. method as claimed in claim 13 is characterized in that, regulates each rigidity adjusting parts (72) and carries out before said brace foundation (20) is immersed in the said water body (14) fully at the said regulating step of height outstanding under the said caisson (70).

15. like each described method among the claim 12-14, it is characterized in that, realize said transportation step in the said water body (14) through said brace foundation (20) retaining part under it self buoyancy function is immersed in.