CN114809063A - A kind of multi-division composite cylindrical foundation and its construction method - Google Patents

Abstract

The invention discloses a multi-compartment composite barrel type foundation and a construction method thereof in the technical field of composite barrel type foundations for offshore wind power. According to the invention, the inner ring cabin plates and the outer ring cabin plates are arranged in the barrel, so that the number of the ring cabin plates is increased, the inner cavity of the barrel can be divided into more cabin structures, and the increased cabin structures can increase the contact area between the cabin plates and the foundation, thereby improving the side friction resistance of the cabin plates, enhancing the bearing capacity of the upper soft soil foundation and expanding the application range of the barrel type foundation.

Description

A kind of multi-division composite cylindrical foundation and its construction method

technical field

The invention relates to the technical field of composite cylindrical foundations for offshore wind power, in particular to a multi-division composite cylindrical foundation and a construction method thereof.

Background technique

With the gradual development of offshore wind power technology, a variety of offshore wind turbine foundations have been put into use, such as gravity foundations, tubular foundations and pile foundations, each of which has its own scope of application. Among them, the cylindrical foundation has been widely used in the field of shallow sea wind power foundation due to its simple structure, easy construction and recovery, and high anti-slip stability.

The geological conditions in our country are very complex. It is a very common situation in practical engineering that the upper foundation has soft soil and the lower foundation soil is hard or even bedrock. The limited height and diameter of the cylinder will cause the traditional suction cylinder foundation to fail to meet the bearing requirements, which will lead to greater risks in the operation of offshore wind power.

SUMMARY OF THE INVENTION

In view of this, the purpose of the present invention is to provide a multi-division composite cylindrical foundation to solve the technical problem of insufficient bearing capacity of the existing cylindrical foundation on the upper soft soil foundation.

The technical scheme adopted in the present invention is: a multi-division composite cylindrical foundation, comprising:

a cylinder body, the cylinder body comprises a cylinder cover and a cylinder wall, and the cylinder cover is fixedly arranged on the top end of the cylinder wall to form the cylinder body with a closed top and an open bottom;

a radial hatch plate, the radial hatch plate is arranged in the cylindrical body along the radial direction of the cylindrical body, and is fixedly connected with the cylindrical cover;

The inner ring deck and the outer ring deck are coaxially arranged in the cylinder, and the inner ring deck and the outer ring deck are respectively fixedly connected with the cylinder cover and the radial deck, so that the A plurality of inner ring sub-chambers are formed between the inner ring tank plate, the outer ring tank plate, the cylinder cover and the radial tank plate, the outer ring tank plate, the cylinder cover, the cylinder A plurality of outer ring compartments are formed between the walls and said radial compartments.

Preferably, the lower surface of the outer ring deck is disposed above the lower surface of the inner ring deck, so that the bottom of the inner ring sub-chamber communicates with the bottom of the outer ring sub-chamber.

Preferably, the radial dimension of the cylinder is D1=30m～55m, the height of the cylinder is H1=5m～20m; the radial dimension of the outer ring deck is D2=12m～25m; The radial dimension of the annular bulkhead is D3=5m-15m, and the height H3 of the inner annular bulkhead and the height H4 of the radial bulkhead are the same as the height H1 of the cylinder.

Preferably, the inner ring deck and the outer ring deck are circular or regular polygons.

Preferably, a ballast plate for improving the bearing capacity of the cylindrical foundation is installed on the cylinder cover.

Preferably, the ballast plate is provided with a positioning groove, and the upper surface of the cylinder cover is provided with a positioning protrusion matched with the positioning groove.

Preferably, the positioning protrusions are concrete columns and are arranged on the cylinder covers above the inner ring sub-divisions in a one-to-one correspondence.

Preferably, a pump port, a grouting port and a grout outlet are provided on the cylinder cover at positions corresponding to the outer ring sub-division, and the outer ring tank is provided with a flow-through hole in a connected state and an isolated state , the communication state is used for the flow of fluid between the adjacent inner ring subdivisions and the outer ring subdivisions, and the isolation state is used to isolate the fluid between the adjacent inner ring subdivisions and the outer ring subdivisions Flow between ring subdivisions.

Another object of the present invention is to provide a construction method for a multi-division composite cylindrical foundation, the construction method comprising the following steps:

S10: Onshore prefabricated multi-subdivision composite tubular foundation and ballast plate;

S20: Hoist into the water and check the air tightness of the middle subdivision, inner ring subdivision and outer ring subdivision;

S30: Adjust the water-air ratio to the middle subdivision, the outer ring subdivision, and the inner ring subdivision;

S40: haul to a predetermined sea area and sink through self-weight sinking and negative pressure sinking;

S50: grouting the middle sub-chamber, the inner ring sub-chamber and the outer ring sub-chamber;

S60: Install the ballast plate on the multi-division composite cylindrical foundation.

Preferably, a construction method for a multi-subdivision composite cylindrical foundation is characterized in that, the S40 includes: S41: when the self-weight sinks, firstly discharge the gas from the outer ring compartment, and then divide the inner ring into the outer ring. The gas of the cabin and the middle sub-chamber is discharged out; S42: when the negative pressure sinks, first perform negative pressure extraction on the outer ring sub-chamber, and then perform negative pressure extraction on the inner ring sub-chamber and the middle sub-chamber .

Beneficial effects of the present invention:

1. The present invention is provided with a coaxial inner ring bulkhead and an outer bulkhead in the cylindrical body of the cylindrical foundation, which increases the number of annular bulkheads, which not only improves the structural strength of the top of the cylindrical body of the cylindrical foundation, but also facilitates loading It can also divide the cylindrical cavity of the cylindrical foundation into more subdivision structures. The increased subdivision structures can increase the contact area between the deck and the foundation, thereby improving the side friction resistance of the deck and enhancing the upper layer. The bearing capacity of weak soil foundations expands the scope of application of cylindrical foundations.

2. The present invention is provided with coaxial inner ring bulkhead and outer ring bulkhead in the cylindrical body of the cylindrical foundation, so that the cylindrical cavity of the cylindrical foundation forms the outer ring compartment and the inner ring compartment which are arranged sequentially from outside to inside. The multi-subdivision structure of the cabin and the middle subdivision, the multi-subdivision structure not only facilitates the smooth towing of the tubular foundation, but also facilitates the stable sinking of the tubular foundation.

3. In the present invention, the lower surface of the outer ring deck is arranged above the lower surface of the inner ring deck, which can not only reduce the amount of steel and reduce the construction cost, but also connect the bottom of the inner ring sub-chamber and the outer ring sub-chamber. , and make the inner ring subdivision and the outer ring subdivision connected as a whole, which is beneficial to improve the stability and anti-slip ability of the cylindrical foundation.

4. In the present invention, a ballast plate is installed on the top of the cylinder body. After the cylinder foundation is grouted, the ballast plate is installed on the top of the cylinder body. The internal soft soil is compacted to further improve the bearing capacity of the cylindrical foundation.

5. The present invention is provided with a flow hole on the outer ring tank plate, and the flow hole can connect the outer ring sub-chamber and the inner ring sub-chamber on both sides of the outer ring tank plate, so as to facilitate sinking under self-weight and negative pressure. When sinking, the gas and liquid in the inner ring sub-chamber are extracted separately through the outer ring sub-chamber, thereby reducing the setting of the pump port, grouting port, grout outlet and related equipment on the cylinder cover, and further reducing the construction cost of the cylindrical foundation.

Description of drawings

Fig. 1 is the first perspective perspective view of the multi-division composite cylindrical foundation of the present invention;

FIG. 2 is a perspective view of the multi-division composite cylindrical foundation of the present invention from a second perspective.

Fig. 3 is the top view of the multi-division composite cylindrical foundation of the present invention;

Fig. 4 is the bottom view of the multi-division composite cylindrical foundation of the present invention;

Figure 5 is a schematic structural diagram of a ballast plate;

FIG. 6 is a schematic diagram of the towing state of the multi-subdivision composite tubular foundation of the present invention;

7 is a schematic diagram of the sinking state of the multi-subdivision composite cylindrical foundation of the present invention.

Description of the reference numbers in the figure:

10. Cylinder body;

11, cylinder cover; 12, cylinder wall; 13, positioning protrusion; 14, pump port; 15, grouting port; 16, slurry outlet; 17, spare pump port;

20. Radial deck;

30. Inner ring deck;

40. Outer ring deck;

50. Inner ring subdivision;

60. Outer ring subdivision;

70. Intermediate compartment;

80. Ballast plate;

81. Positioning groove;

90. Overflow hole.

Detailed ways

The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. These embodiments are only used to illustrate the present invention, but not to limit the present invention.

In the description of the present invention, it should be noted that the terms "center", "portrait", "horizontal", "top", "bottom", "front", "rear", "left", "right", " The orientations or positional relationships indicated by vertical, horizontal, top, bottom, inside, and outside are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying It is described, rather than indicated or implied, that the device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as limiting the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed to indicate or imply relative importance.

In the description of the present invention, it should be noted that the terms "installed", "connected" and "connected" should be understood in a broad sense, unless otherwise expressly specified and limited, for example, it may be a fixed connection or a detachable connection Connection, or integral connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

Also, in the description of the present invention, unless otherwise specified, "plurality" means two or more.

Example, as shown in Figures 1-7, a multi-subdivision composite cylindrical foundation, the cylindrical foundation is used to fix the tower of offshore wind power in the sea, and provide sufficient bearing for the tower and wind turbine of offshore wind power force; the barrel foundation includes:

The cylinder body 10, the cylinder body 10 comprises a cylinder cover 11 and a cylinder wall 12 made of steel, the cylinder cover 11 is fixedly arranged on the top of the cylinder wall 12 by welding, so as to form a closed top, Cylinder 10 with an open bottom.

The radial bulkhead 20 is disposed in the cylindrical body 10 along the radial direction of the cylindrical body 10 , and a plurality of radial bulkheads 20 are evenly distributed in the cylindrical body 10 and are fixedly connected to the cylindrical cover 11 .

The inner ring tank plate 30 is coaxially arranged in the cylinder body 10 and is fixedly connected with the cylinder cover 11 and the radial tank plate 20 respectively, so that a space is formed between the inner ring tank plate 30 and the cylinder cover 11 . An intermediate compartment 70 with an open bottom.

The outer ring tank plate 40 is arranged between the cylinder body 10 and the inner ring tank plate 30, and is fixedly connected with the cylinder cover 11 and the radial tank plate 20 respectively, so that the inner ring tank plate 30, the cylinder A plurality of inner ring sub-chambers 50 with an evenly distributed circumference and an open bottom end are formed between the cover 11, the radial tank plate 20 and the outer ring tank plate 40, the outer ring tank plate 40, the cylinder cover 11, the radial tank plate 20 and the cylinder Between the walls 12 are formed a plurality of outer ring sub-chambers 60 with a uniform circumference and an open bottom end.

In the present application, by arranging coaxial inner ring bulkheads 30 and outer circumferential bulkheads 40 in the cylindrical body 10 of the cylindrical foundation, the number of annular bulkheads is increased, which can not only improve the structural strength of the top of the cylindrical body 10 of the cylindrical foundation , to facilitate the downward transfer of the load, and the inner cavity of the cylindrical body 10 of the cylindrical foundation can also be divided into more subdivision structures, and the increased subdivision structures can increase the contact area between the deck and the foundation, thereby increasing the side friction resistance, enhance the bearing capacity of the upper soft soil foundation, and expand the scope of application of the cylindrical foundation. At the same time, the inner ring tank plate 30 and the outer ring tank plate 40 in the present application can make the inner cavity of the cylindrical body 10 of the cylindrical foundation form the outer ring sub-chamber 60, the inner ring sub-chamber 50 and the middle sub-chamber which are sequentially arranged from the outside to the inside. 70's multi-subdivision structure, the multi-subdivision structure is not only convenient to control the smooth towing of the tubular foundation, but also to control the stable sinking of the tubular foundation.

In a specific embodiment, as shown in FIG. 2 and FIG. 6 , in the vertical direction, the lower surface of the outer ring deck 40 is set above the lower surface of the inner ring The bottom communicates with the bottom of the outer ring compartment 60 . In this way, by arranging the lower surface of the outer ring deck 40 above the lower surface of the inner ring deck 30, the top of the inner ring sub-chamber 50 and the top of the outer ring sub-chamber 60 can be in a disconnected state, and at the same time, the The bottoms of the outer ring sub-chambers 60 of the inner ring sub-chambers 50 are in a connected state, so that the number of top sub-chambers in the inner cavity of the cylinder body 10 is greater than that of the bottom sub-chambers. For example, when the outer ring bulkhead 40 is a regular hexagonal tube with a height of 8m, and the inner ring bulkhead 30 and the cylinder wall 12 are circular tubes with a height of 8m, the inner cavity of the cylinder body 10 is 0-6m from the cylinder cover 11 downward. The 13-division structure includes 1 middle sub-chamber + 6 inner ring sub-chambers 50 + 6 outer ring sub-chambers 60, while the inner cavity of the tube body 10 with the cover 11 down 6m to 8m only includes 1 middle sub-chamber Cabin + 7 sub-cabin structure with 6 connecting cavities. In this way, not only can the amount of steel material be reduced, the construction cost of the cylindrical foundation can be reduced, but also the bottoms of the inner ring sub-chamber 50 and the outer ring sub-chamber 60 can be connected, so that the inner ring sub-chamber 50 and the outer ring sub-chamber 60 are connected as It is integrated, which is beneficial to improve the overall stability and anti-slip ability of the cylindrical foundation.

Specifically, the radial dimension of the cylinder body 10 is D1=30m～55m, the height H1=5m～20m of the cylinder body 10; the thickness of the cylinder cover 11 is 0.01m～0.1m, and the thickness of the cylinder wall 12 is 0.01m～0.06m The radial dimension of the outer ring tank plate 40 is D2=12m～25m; the radial dimension of the inner ring tank plate 30 is D3=5m～15m, and the height H3 of the inner ring tank plate 30 and the height H4 of the radial tank plate 20 All are the same as the height H1 of the cylinder body 10; the thicknesses of the outer ring bulkhead 40, the inner circumferential bulkhead 30 and the radial bulkhead 20 are all 0.01m-0.06m.

Wherein, both the inner ring deck 30 and the outer ring deck 40 can be circular or regular polygons.

In a specific implementation, as shown in FIG. 1 , FIG. 2 , FIG. 3 and FIG. 5 , a ballast plate 80 for improving the bearing capacity of the cylindrical foundation is installed on the cylinder cover 11 . In this way, a detachable ballast plate 80 is arranged on the drum cover 11, and the weight of the drum foundation can be reduced when the drum foundation is towing and sinking, so as to control the stable towing and sinking of the drum foundation; After the cylindrical foundation is grouted, the weight of the cylindrical foundation can be increased by installing a plurality of ballast plates 80 on the cylindrical cover 11 of the cylindrical foundation evenly distributed around the circumference, and the foundation under the cylindrical foundation can be further compacted, so as to increase the weight of the cylindrical foundation. bearing capacity of the foundation.

Preferably, the ballast plate 80 is a fan-shaped concrete ballast plate, and a plurality of concrete ballast plates are installed on the cylinder cover 11 of the cylindrical foundation evenly distributed around the circumference to form an annular shape and are ballasted on the bearing area of the cylinder cover 11 ( Mainly on the cylinder cover 11 relative to the inner ring sub-chamber 50 and the outer ring sub-chamber 60), the middle of the cylinder cover 11 is the connection area (tube) for connecting with the upper structure (jacket or single-column transition section). The cover 11 corresponds to the position of the intermediate compartment 70).

Specifically, a positioning groove 81 is provided on the lower surface of the concrete ballast plate, and a plurality of positioning protrusions 13 that are matched with the positioning groove 81 are evenly distributed around the circumference of the bearing area of the cylinder cover 11, and the positioning The protrusions 13 are in a one-to-one correspondence with the positioning grooves 81 , and are located just above the inner ring sub-chamber 50 , and are used to quickly locate the correct installation of the ballast plate 80 . The positioning protrusion 13 is a cylinder or a polygonal prism formed by pouring concrete, and its size is 1.5m-2.5m in diameter and 0.3m-1.0m in height.

In a specific embodiment, as shown in FIG. 1 , FIG. 3 and FIG. 4 , the cylinder cover 11 is provided with a pump port 14 , a grouting port 15 , an outlet port 14 , a pump port 14 , a grouting port 15 , an outlet port 14 , and a pump port 14 . Slurry port 16 and spare pump port 17. Among them, the pump port 14 and the spare pump port 17 are used for the pump system. During the negative pressure sinking process, the pump system can form a negative pressure in the cabin by pumping water to ensure the sinking of the cylindrical foundation. Each pump port 14 and a spare pump Port 17 is connected with a pressure regulating pipeline. During the negative pressure sinking process, the air pressure of each sub-chamber can be independently adjusted through the pressure regulating pipeline to achieve fine leveling of the negative pressure sinking of the cylindrical foundation; the cylindrical foundation sinks in place Afterwards, the unevenness of the foundation at the lower part of the cylinder cover 11 will affect the supporting effect of the cylinder foundation. At this time, it is necessary to grouting into the cylinder to avoid the existence of a gap between the cylinder cover 11 and the foundation soil, so as to ensure that the cylinder cover 11 can give full play to the jacking effect. effect. In this way, the pump port 14 and the spare pump port 17 are used for the gas filling of each sub-chamber of the cylindrical foundation, and the external discharge is discharged with sea water; pulp.

Preferably, the inner ring sub-chambers 50 and the outer ring sub-chambers 60 are in a one-to-one correspondence, and the outer ring compartment plate 40 is provided with a flow hole 90 having a connected state and an isolated state, and the connected state is used for fluids (gas and The flow of seawater) between the adjacent inner ring sub-chambers 50 and the outer ring sub-chambers 60, the isolation state is used to isolate the fluid flow between the adjacent inner ring sub-chambers 50 and the outer ring sub-chambers 60. In this way, when the flow hole 90 is in an isolated state, the flow of gas and seawater between the inner ring sub-chamber 50 and the outer ring sub-chamber 60 can be isolated, so that the inner ring sub-chamber 50 and the outer ring sub-chamber 60 are mutually Disconnected independent state; when the flow hole 90 is in the connected state, the gas and seawater can flow between the inner ring sub-chamber 50 and the outer ring sub-chamber 60, so that the gas and seawater in the inner ring sub-chamber 50 can pass through each other. The outer ring sub-chamber 60 enters and exits the cylindrical foundation, and reduces the arrangement of the pump port 14, the grouting port 15, the grouting port 16 and the auxiliary equipment on the cylindrical cover 11, so as to reduce the construction cost of the cylindrical foundation.

More preferably, three flow holes 90 are provided at the connection between the outer ring tank plate 40 and the radial tank plate 20, and the three flow holes 90 can divide the two inner rings on both sides of the radial tank plate 20. The cabin 50 and the two outer ring sub-chambers 60 are communicated into an independent sub-chamber, that is, by setting the flow holes 90 on the three radial cabin plates 20 and the outer ring cabin plate 40, so as to separate the six inner ring sub-chambers 50 It is connected with 6 outer ring sub-chambers 60 to form 3 independent sub-chambers of equal volume.

Specifically, the flow-through hole 90 includes a communication hole disposed on the top of the outer ring bulkhead 40 and the radial bulkhead 20, and a valve fixedly disposed in the communication hole. The valve in the flow-through hole 90 can be opened and closed as required.

Embodiment: the construction method of the above-mentioned multi-division composite cylindrical foundation, as shown in Figure 6, Figure 7, the construction method comprises the following steps:

S10: Prefabricating a multi-division composite cylindrical foundation and ballast plate 80 on land.

S20: After assembling and debugging the multi-division composite cylindrical foundation and the superstructure, tower and fan, hoist it into the water, and check the middle subdivision 70, inner ring subdivision 50 and outer ring subdivision 60 of the multi-division composite cylindrical foundation air tightness.

S30 : Adjust the water-air ratio of the middle sub-chamber 70 , the inner ring sub-chamber 50 and the outer ring sub-chamber 60 to be the middle sub-chamber 70 , the outer ring sub-chamber 60 , and the inner ring sub-chamber 50 .

Specifically: as shown in Figure 6 (the dotted line in the figure is the liquid level position), adjust the water in the middle sub-chamber 70, the inner ring sub-chamber 50 and the outer ring sub-chamber 60 of the multi-sub-chamber composite cylindrical foundation that meets the air tightness requirements Air ratio; wherein, all the seawater in the middle sub-chamber 70 can be discharged and filled with air by means of pumping and pumping, so that the middle sub-chamber 70 can form an air cushion effect, which can better provide buoyancy for the cylindrical foundation; at the same time Adjust the draught of the cylindrical foundation, and make the water-air ratio in the outer ring sub-chamber 60 < the water-air ratio in the inner ring sub-chamber 50, where the water-air ratio refers to the ratio of seawater volume to air volume in each sub-chamber, That is, the liquid level in the outer ring sub-chamber 60 is below the liquid level in the inner ring sub-chamber 50 .

S40: After being hauled to the predetermined sea area, the multi-division composite cylindrical foundation is sunk successively through self-weight sinking and negative pressure sinking.

Specifically, S41: when the self-weight sinks, first open the valve of the pump port 14 on the cylinder cover 11 corresponding to the outer ring sub-compartment 60, and make the cylinder-shaped foundation begin to sink by its own weight through the deflation of the outer ring sub-compartment 60. During the sinking process, it is necessary to observe the sinking posture of the cylindrical foundation in real time. If it is inclined, it can be leveled by adjusting the valve of the pump port 14 of different subdivisions (when the cylindrical foundation is inclined downward in a certain direction, it can be adjusted smaller in this direction). The pump port valve of the cabin can be adjusted to slow down the exhaust speed; or the pump port valve of the sub-chamber in the opposite direction can be increased to increase the exhaust speed; the two can also be carried out at the same time, and the specific leveling strategy can be determined according to the actual situation). In order to control the sinking speed, the valve size of each subdivision can be adjusted at the same time. After the basic posture of the cylinder is adjusted to the level and the sinking process is stable, the valve of the pump port 14 of the middle sub-compartment 70 and all the valves of the flow holes 90 on the outer ring deck 40 can be fully opened, and the size of the valve of the pump port 14 can be adjusted by adjusting the size of the valve. Continue to control the sinking attitude and sinking speed of the cylindrical foundation until the self-weight of the cylindrical foundation sinks into the seabed mud surface (as shown in Figure 7, the dotted line in the figure is the position of the liquid level, which is realized as the upper surface of the foundation), and the The force balance of the type foundation no longer sinks.

S42: When the negative pressure sinks, the method of pumping the negative pressure through the pump system is used to provide sinking power. First open the valve of the pump port 14 of the outer ring compartment 60, the valve of the flow hole 90 on the outer ring compartment plate 40 is kept closed, and use the submersible pump to pump the negative pressure to the outer ring compartment 60. When the negative pressure is pumped to the cylindrical foundation When it does not continue to sink or the inclination angle is too large and it is difficult to level, then open the valve of the pump port 14 of the intermediate compartment 70 and the valve of the flow hole 90 on the outer ring tank plate 40 to continue to pump negative pressure or level, so that the cylindrical foundation Continue to sink until it is in place. In the process of negative pressure sinking, it is also necessary to control the posture of the cylindrical foundation. If it slopes downward in a certain direction, it can be leveled by subdividing water in the opposite direction or subdividing air in the direction.

S50: After the subsidence is completed, grouting is carried out to each cabin in the cylinder body 10 through the grouting port 15 until the slurry overflows from the grouting outlet 16, indicating that the grouting material has filled the foundation and the cylinder in each sub-cabin of the cylinder foundation at this time. Cover the gap at 11 and stop the grout.

S60: After the grouting is completed, install the ballast plate 80 on the multi-division composite cylindrical foundation.

Specifically: use a floating crane to lower the ballast plate 80 above the cylinder cover 11, and continue to lower it until the positioning protrusion 13 on the cylinder-shaped base cylinder cover 11 enters the positioning groove 81 of the ballast plate 80, and the ballast plate 80 is installed On the cylindrical foundation, it is used to compact and strengthen the soil inside the cylindrical foundation.

Compared with the prior art, the present application at least has the following beneficial technical effects:

The application solves the problem of insufficient bearing capacity caused by the existence of soft soil in the upper foundation, and the barrel-type foundation in this application has a wide range of applications, convenient transportation and installation, recyclability, and high bearing capacity, which can not only convert the upper fan load into a barrel-type foundation The controllable tensile and compressive stress of the foundation structure can also be used as a gravity structure to resist the upper load through its own gravity and ballast plate. operational risk.

The above are only the preferred embodiments of the present invention. It should be pointed out that for those skilled in the art, without departing from the technical principles of the present invention, several improvements and replacements can be made. These improvements and replacements It should also be regarded as the protection scope of the present invention.

Claims (10)

1. A multi-compartmental composite tubular foundation comprising:

the cylinder body (10), the cylinder body (10) comprises a cylinder cover (11) and a cylinder wall (12), the cylinder cover (11) is fixedly arranged at the top end of the cylinder wall (12) to form the cylinder body (10) with a closed top end and an open bottom;

the radial cabin plate (20) is arranged in the cylinder body (10) along the radial direction of the cylinder body (10) and is fixedly connected with the cylinder cover (11);

the inner ring cabin plate and the outer ring cabin plate are coaxially arranged in the barrel (10), the inner ring cabin plate (30) and the outer ring cabin plate (40) are fixedly connected with the barrel cover (11) and the radial cabin plate (20) respectively, so that a plurality of inner ring sub-cabins (50) are formed among the inner ring cabin plate (30), the outer ring cabin plate (40), the barrel cover (11) and the radial cabin plate (20), and a plurality of outer ring sub-cabins (60) are formed among the outer ring cabin plate (40), the barrel cover (11), the barrel wall (12) and the radial cabin plate (20).

2. A multi-compartment composite barrel type foundation according to claim 1, wherein the lower surface of the outer ring deck (40) is disposed above the lower surface of the inner ring deck (30) so that the bottom of the inner ring compartment (50) communicates with the bottom of the outer ring compartment (60).

3. A multi-compartment composite barrel type foundation according to claim 1, wherein the radial dimension D1 of the barrel (10) is 30-55 m, and the height H1 of the barrel (10) is 5-20 m; the radial size of the outer ring cabin plate (40) is 12-25 m when D2 is equal to D2; the radial dimension of the inner ring cabin plate (30) is D3 which is 5-15 m, and the height H3 of the inner ring cabin plate (30) and the height H4 of the radial cabin plate (20) are the same as the height H1 of the cylinder (10).

4. A multi-compartmental composite tubular foundation as claimed in claim 1 wherein said inner and outer annular panels (30, 40) are circular or regular polygonal.

5. A multi-compartment composite bucket foundation according to claim 1 in which a ballast plate (80) is mounted to the bucket cover (11) to increase the load bearing capacity of the bucket foundation.

6. A multi-compartment composite barrel type foundation according to claim 5, wherein the pressure-carrying plate (80) is provided with a positioning groove (81), and the upper surface of the barrel cover (11) is provided with a positioning protrusion (13) matched with the positioning groove (81).

7. A multi-compartment composite bucket foundation according to claim 6 in which the locating projections (13) are concrete columns and are located one to one on the bucket covers (11) above the inner ring compartments (50).

8. The multi-compartment composite bucket type foundation according to claim 1, wherein the bucket cover (11) is provided with a pump port (14), a grouting port (15) and a grout outlet (16) at positions corresponding to the outer ring compartment (60), and the outer ring compartment plate (40) is provided with an overflowing hole (90) having a communication state and an isolation state, wherein the communication state is used for fluid flowing between the adjacent inner ring compartment (50) and the outer ring compartment (60), and the isolation state is used for isolating fluid flowing between the adjacent inner ring compartment (50) and the outer ring compartment (60).

9. The method for constructing a multi-compartment composite barrel type foundation according to any one of claims 1 to 8, wherein the construction method comprises the steps of:

s10: prefabricating a multi-compartment composite cylindrical foundation and a pressure-carrying plate (80) on land;

s20: hoisting the outer ring subdivision into water and checking the air tightness of the middle subdivision (70), the inner ring subdivision (50) and the outer ring subdivision (60);

s30: the water-air ratio is adjusted to be that the middle subdivision (70) is smaller than the outer ring subdivision (60) is smaller than the inner ring subdivision (50);

s40: hauling to a preset sea area and sinking through self-weight sinking and negative pressure sinking;

s50: -grouting the intermediate subdivision (70), the inner ring subdivision (50) and the outer ring subdivision (60);

s60: and mounting the pressure-bearing plate (80) on the multi-compartment composite cylindrical foundation.

10. The method for constructing a multi-compartment composite barrel type foundation as claimed in claim 9, wherein said S40 comprises:

s41: when the self weight sinks, the gas of the outer ring subdivision (60) is discharged, and then the gas of the inner ring subdivision (50) and the gas of the middle subdivision (70) are discharged;

s42: when the negative pressure sinks, the outer ring sub-chamber (60) is firstly pumped with negative pressure, and then the inner ring sub-chamber (50) and the middle sub-chamber (70) are pumped with negative pressure.

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