CN218952171U - Offshore wind power steel pipe pile dismantling device under deepwater condition - Google Patents

Abstract

The utility model discloses a device for dismantling an offshore wind power steel pipe pile under a deep water condition, which comprises a supporting device and a counterforce device, wherein a hydraulic jack is arranged between the supporting device and the counterforce device, the supporting device is used for providing jacking supporting force for the hydraulic jack, and the counterforce device is fixedly connected with the steel pipe pile to be dismantled and then is used for providing jacking counterforce for the hydraulic jack. The device has the advantages that the device is simple in structure, a high-voltage system is not needed during construction, the construction difficulty is greatly reduced, the influence of the environment on the construction during the construction is small, the influence of rising and falling tide on the construction in the whole construction process is not needed to be considered, the construction progress is convenient to manage and control, and the construction period can be greatly shortened.

Description

Offshore wind power steel pipe pile dismantling device under deepwater condition

Technical Field

The utility model belongs to the technical field of offshore wind power, and particularly relates to a device for dismantling an offshore wind power steel pipe pile under a deep water condition.

Background

After the service life of the offshore wind farm is prolonged, facilities are removed, and all the navigation obstacles on the site are removed. In the traditional dismantling process, the pile foundation is dismantled generally by adopting a cutting process, namely, injection cutting equipment and pumping equipment are arranged in the pile, and slurry is pumped from the inside of the pile to the outside; then installing equipment such as energy gathering blasting, a diamond wire saw, high-pressure water abrasive cutting and the like, and cutting the pile foundation by using a hydraulic cutting knife cutting or hot melt cutting process, wherein the process has the problems that the lower part of the pile foundation still remains on the seabed and the like.

The patent with publication number CN 108797588A discloses an auxiliary tool for integrally dismantling a single pile foundation of a soft soil seabed offshore wind turbine and a dismantling process, wherein the auxiliary tool comprises a sealing device, a hydraulic pressurizing system, an auxiliary dismantling air bag, an air bag inflating device, an auxiliary dismantling air bag supporting bracket, a plurality of wall-mounted vibrators and a high-pressure side wall antifriction and water spraying system.

The main drawbacks of this patent are:

1. the implementation of the patent depends on the rising and falling tide at sea, so that not only is the uncertainty larger, but also the dismantling period is longer, and the operation cost is too high due to offshore operation.

2. The patent needs to rely on a water conservancy pressurizing system and a high-pressure side wall antifriction and resistance water spraying system, equipment is complex as a whole, and construction difficulty is high.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model provides the offshore wind power steel pipe pile dismantling device under the deep water condition, which has the advantages of simple structure, small construction difficulty, little influence of the environment on construction, effective shortening of the construction period and reduction of the construction cost.

The technical purpose of the utility model is realized by the following technical scheme: the method for dismantling the offshore wind power steel pipe pile under the deepwater condition comprises a supporting device and a counterforce device, wherein a hydraulic jack is arranged between the supporting device and the counterforce device, the supporting device is used for providing lifting supporting force for the hydraulic jack, and the counterforce device is fixedly connected with the steel pipe pile to be dismantled and then is used for providing lifting counterforce for the hydraulic jack; the buoyancy device comprises two semicircular connecting tiles, the two semicircular connecting tiles are connected through bolts, a cable rope ring is arranged on each connecting tile, and the cable rope ring is connected with an air bag through an air bag cable.

Preferably, the supporting device comprises a precast tubular pile used for driving the soil body in the steel pipe pile to be dismantled and a bottom plate fixedly connected to the top of the precast tubular pile.

Preferably, the reaction device comprises a fixing frame and an adjusting frame, wherein a plurality of bolt connecting grooves with different heights are transversely formed in the fixing frame, and the fixing frame is connected with the adjusting frame through bolts.

Preferably, the adjusting frame comprises a counter-force plate and connecting lugs connected to two sides of the counter-force plate, and the connecting lugs are connected with the fixing frame.

Preferably, a vibration exciter is arranged at the bottom of the counter-force plate, and a hollow dowel bar is further arranged between the vibration exciter and the hydraulic jack.

Compared with the prior art, the utility model has the following beneficial effects:

1. the device provided by the utility model has a simple structure, and a high-pressure system is not required during construction, so that the construction difficulty is greatly reduced.

2. The utility model has small influence on the construction due to the environment during the construction, does not need to consider the influence of rising and falling tide on the construction in the whole construction process, is convenient for the management and control of the construction progress, and can greatly shorten the construction period.

Drawings

Fig. 1 is a schematic structural view of the present utility model.

Fig. 2 is a schematic diagram of a connection structure between a fixing frame and an adjusting frame in the present utility model.

Fig. 3 is a schematic top view of the fixing frame in the present utility model.

Fig. 4 is a schematic side view of the fixing frame in the present utility model.

Fig. 5 is a schematic view of the structure of the buoyancy device according to the present utility model.

Fig. 6 is a schematic structural view of a three-terminal airbag connecting cable in the present utility model.

In the above figures: 1. a steel pipe pile; 2. a soil core; 3. a crane vessel; 4. an adjusting frame; 5. a fixing frame; 7. a hydraulic jack; 8. a top plate; 9. a bottom plate; 10. a vibration exciter; 11. prefabricating a tubular pile; 12. a hollow dowel bar; 20. an airbag protective frame; 21. an air bag; 22. an intake valve; 23. an air bag communicating column; 24. a main inflation tube; 25. a first branch inflation tube; 26. a second branch inflation tube; 27. the three-end air bag is connected with a cable; 28. an inflator pump; 29. a buoyancy device; 40. a connecting lug; 41. a reaction plate; 50. an arc-shaped end plate; 51. lifting lugs; 53. loading a reinforcing plate; 54. a support plate; 60. a connecting bolt; 70. multiple rows of bolt sliding grooves; 71. a first bolt sliding groove; 72. a second bolt sliding groove; 73. a third bolt sliding groove; 74. a vertical sliding groove of the bolt; 270. a first connection tile; 271. a second connecting tile; 272. a cable loop; 273. a bolt; 274. a first end of the cable; 275. a second end of the cable; 276. and a third end of the cable.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-5, as a preferred embodiment of the present utility model, the present embodiment provides a device for dismantling a wind power steel pipe pile at sea under a deep water condition, which comprises a supporting device and a counterforce device, wherein a hydraulic jack 7 is installed between the supporting device and the counterforce device, the counterforce device comprises an adjusting frame 4 and a fixing frame 5, the fixing frame 5 comprises a loading reinforcing plate 53, the supporting device comprises a prefabricated pipe pile 11, a hollow dowel bar 12 is also arranged between the counterforce device and the hydraulic jack 7, and the buoyancy device comprises an air bag protection frame 20, an air bag 21, a main inflation pipe 24 and an inflation pump 28; the buoyancy device 29 further comprises a first connecting shoe 270, a second connecting shoe 271, a cable ring 272 and bolts 273, wherein the first connecting shoe 270 and the second connecting shoe 271 which are semicircular are fixedly connected to the first connecting shoe 270 and the second connecting shoe 271 through the bolts 273 and fastened to the steel pipe pile 1.

In the above embodiment, referring to fig. 1, the air bag 21 is in a long cylindrical shape, the outer portion thereof is provided with the air bag protecting frame 20, the air bag 21 is composed of a plurality of sub-air bags connected through the air bag communicating column 23, one end of the air bag 21 is provided with the air inlet valve 22, the air pump 28 is used for filling air into the air bag 21 through the main air charging pipe 24, the first branch air charging pipe 25 and the second branch air charging pipe 26 for water discharging, so as to form huge buoyancy, and the air pump 28 is arranged on the crane ship 3.

The precast tubular pile 11 is positioned in the soil core 2 in the steel pipe pile 1 and mainly plays a role of supporting the hydraulic jack 7 at the end part, the precast tubular pile is connected with the hydraulic jack 7, the two ends of the hydraulic jack 7 are respectively provided with a bottom plate 9 and a top plate 8, and pile top lifting lugs 51 are arranged on two sides of the pile top of the steel pipe pile 1 to be dismantled.

After assembly, the hydraulic jack 7 is located between the bottom plate 9 and the top plate 8. The upper part of the hollow dowel bar 12 is provided with a vibration exciter 10, the adjusting frame 4 comprises a connecting lug 40 and a counter-force plate 41, and the top of the vibration exciter 10 is provided with the counter-force plate 41 of the adjusting frame.

Further, the fixing frame 5 is composed of an arc-shaped end plate 50, a loading reinforcing plate 53, a supporting plate 54 and a plurality of rows of bolt sliding grooves 70. The multi-row bolt sliding grooves 70 are composed of a first bolt sliding groove 71, a second bolt sliding groove 72, a third bolt sliding groove 73 and a bolt vertical sliding groove 74, so that the loading system of the hydraulic jack 7 is conveniently adjusted, the vertical intervals of the multi-row bolt sliding grooves 70 are larger, a higher clearance is reserved between the counter-force plate 41 and the pile top of the steel pipe pile 1, the adjusting frame 4 can be adjusted layer by layer when the hydraulic jack 7 fully reaches the maximum stroke, the clearance between the adjusting frame and the pile top of the steel pipe pile 1 is reduced, and the loading stroke distance is provided for the hydraulic jack 7.

Further, referring to fig. 6, the airbag fender 20 is connected to a three-terminal airbag connecting cable 27, and the three-terminal airbag connecting cable 27 is composed of a cable first end 274, a cable second end 275 and a cable third end 276.

The embodiment has a simple structure, does not need to adopt a high-voltage system during construction, and reduces the pipe drawing construction difficulty of the foundation steel pipe pile of offshore wind power.

When the offshore wind power steel pipe pile is dismantled under the deepwater condition, the method comprises the following steps:

s1, installing a supporting device: for the construction of dismantling an ultra-long friction pipe pile, firstly, a plurality of prefabricated pipe piles 11 are driven into a soil core 2 at the lower part of a steel pipe pile 1 to be dismantled, and a bottom plate 9 is fixedly arranged at the top of prefabricated filling, wherein the prefabricated pipe piles 11 are used for providing jacking supporting force for a hydraulic jack 7;

s2, installing a buoyancy device: the steel pipe pile 1 is connected with the first connecting tile 270 and the second connecting tile 271 by adopting bolts 273 to be pre-connected, a certain distance is kept between the connection of the first connecting tile 270 and the second connecting tile 271 and the steel pipe pile 1, two three-end air bag connecting cables 27 respectively penetrate through cable rings 272 which are symmetrical on two sides in advance, a buoyancy device 29 is lowered to a position 3m above the elevation of the mud surface of the steel pipe pile through the cables, then the bolts 273 are fastened, as shown in fig. 1 and 6, an air bag 21 with an air bag protection frame 20 is kept in an uninflated state, a first end 274 of the cable of the three-end air bag connecting cable 27 which penetrates through the cable ring 272 is connected and fixed with the air bag protection frame 20, a second end 275 of the cable is fixed on a winch of a crane ship 3, the hoisting air bag 21 is lowered into seawater, the winch is rotated, the air bag 21 is lowered to the elevation under the action of pulling force, and the winch is locked to fix the air bag 21; then the buoyancy device at the other side of the steel pipe pile 1 is put down in the same way;

s3, installing a jack, a vibration exciter and a counterforce device: the method comprises the steps of sequentially lowering and installing a hydraulic jack 7 and a vibration exciter 10 in a steel pipe pile tube 1 to be dismantled, welding a loading reinforcing plate 53 of a fixing frame 5 of a counterforce device on the outer surface of the steel pipe pile 1 to be dismantled, connecting an adjusting frame 4 with the fixing frame 5 by adopting a connecting bolt 60, wherein the connecting position of the bolt is positioned in a first bolt sliding groove 71;

s4, inflating the air bag: an inflator pump 28 is operated on the crane ship 3, so that air enters the air bags on two sides of the steel pipe pile respectively through the main air tube 24, the first branch air tube 25 and the second branch air tube 26, the sub air bags are communicated with each other through air bag communication columns, the air bags float upwards after being inflated to a preset pressure, a third end 276 of a mooring rope is fixed on the pile top lifting lug 51 of the steel pipe pile, and the buoyancy of the buoyancy device is enabled to be fully acted on the steel pipe pile 1;

s5, connecting steel pipe piles: connecting crane hooks on the crane ship 3 with lifting lugs 51 on two sides of the steel pipe pile 1;

s6 pile pulling: simultaneously starting the vibration exciter 10 and the hydraulic jack 7 to enable the steel pipe pile 1 to be dismantled to gradually move upwards under the combined action of the buoyancy device, the upward pulling force of the crane ship, the low-cycle high-frequency vibration action of the vibration exciter and the loading and the upward pulling of the jack;

s7, adjusting stroke reloading of the hydraulic jack 7: after the vertical stroke of the hydraulic jack 7 reaches the maximum stroke, the crane keeps a lifting and tensioning state, the stroke of the hydraulic jack 7 is restored to a preset position, the connecting position of the adjusting frame 4 and the fixing frame 5 is moved downwards, the adjusting frame 4 is connected to the fixing frame 5 again, the hydraulic jack 7 and the vibration exciter 10 are started to reload and excite, the pile is pulled upwards continuously, and the operation is circulated until the steel pipe pile is pulled out;

s8, recycling: the device comprises a recovery supporting device, a hydraulic jack, a vibration exciter and a counterforce device, and a buoyancy device is recovered.

In the pipe pulling process, the upward pulling resistance and the upward pulling force in the pile foundation dismantling process are respectively calculated according to the following formulas:

pull-up resistance = tubular pile outer wall friction resistance + tubular pile inner wall friction resistance + after deducting buoyancy tubular pile dead weight + pile foundation affiliated structure dead weight; pull-up force = jack loading + air bag buoyancy + exciter power action + crane pull-up force.

The environment has little influence on the construction during the construction, the influence of rising and falling tide on the construction in the whole construction process is not needed to be considered, the construction progress management and control are convenient, and the construction period can be greatly shortened.

Finally, it is noted that the above embodiments are only for illustrating the technical solution of the present utility model and not for limiting the same, and although the present utility model has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the technical solution of the present utility model, which is intended to be covered by the scope of the claims of the present utility model.

Claims (5)

1. The offshore wind power steel pipe pile dismantling device under the deepwater condition is characterized by comprising a supporting device and a counterforce device, wherein a hydraulic jack is arranged between the supporting device and the counterforce device, the supporting device is used for providing jacking supporting force for the hydraulic jack, and the counterforce device is fixedly connected with the steel pipe pile to be dismantled and then is used for providing jacking counterforce for the hydraulic jack; the buoyancy device comprises two semicircular connecting tiles, the two semicircular connecting tiles are connected through bolts, a cable rope ring is arranged on each connecting tile, and the cable rope ring is connected with an air bag through an air bag cable.

2. The offshore wind power steel pipe pile dismantling device under deep water conditions according to claim 1, wherein the supporting device comprises a precast pipe pile used for being driven into soil in the steel pipe pile to be dismantled and a bottom plate fixedly connected to the top of the precast pipe pile.

3. The offshore wind power steel pipe pile dismantling device under the deepwater condition according to claim 1, wherein the counterforce device comprises a fixing frame and an adjusting frame, a plurality of bolt connecting grooves with different heights are transversely formed in the fixing frame, and the fixing frame is connected with the adjusting frame through bolts.

4. The offshore wind power steel pipe pile dismantling device under the deepwater condition according to claim 3, wherein the adjusting frame comprises a counter-force plate and connecting lugs connected to two sides of the counter-force plate, and the connecting lugs are connected with the fixing frame.

5. The offshore wind power steel pipe pile dismantling device under the deepwater condition according to claim 4, wherein a vibration exciter is installed at the bottom of the counter-force plate, and a hollow dowel bar is further installed between the vibration exciter and the hydraulic jack.

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