CN112411603A - Installation and construction process of offshore wind power booster station - Google Patents
Installation and construction process of offshore wind power booster station Download PDFInfo
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- CN112411603A CN112411603A CN202011315423.4A CN202011315423A CN112411603A CN 112411603 A CN112411603 A CN 112411603A CN 202011315423 A CN202011315423 A CN 202011315423A CN 112411603 A CN112411603 A CN 112411603A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
- E02D27/42—Foundations for poles, masts or chimneys
- E02D27/425—Foundations for poles, masts or chimneys specially adapted for wind motors masts
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
- E02D27/44—Foundations for machines, engines or ordnance
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
- E02D27/52—Submerged foundations, i.e. submerged in open water
- E02D27/525—Submerged foundations, i.e. submerged in open water using elements penetrating the underwater ground
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D33/00—Testing foundations or foundation structures
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/24—Prefabricated piles
- E02D5/28—Prefabricated piles made of steel or other metals
- E02D5/285—Prefabricated piles made of steel or other metals tubular, e.g. prefabricated from sheet pile elements
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/88—Dredgers; Soil-shifting machines mechanically-driven with arrangements acting by a sucking or forcing effect, e.g. suction dredgers
- E02F3/8808—Stationary installations, e.g. installations using spuds or other stationary supports
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- Mining & Mineral Resources (AREA)
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- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Mechanical Engineering (AREA)
- Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
Abstract
The invention relates to an installation construction process of an offshore wind power booster station, wherein the offshore wind power booster station comprises a pile foundation, a jacket and an upper assembly which are sequentially connected from bottom to top, the pile foundation consists of four steel pipe piles, and the installation construction process comprises the steps of preparing a ship, anchoring and taking place, pre-surveying, installing and positioning a formwork device, inserting and driving the steel pipe piles, cleaning soil in the steel pipe piles, repeatedly driving the steel pipe piles and measuring, installing the jacket, grouting underwater, cutting a non-slip block, installing and welding the upper assembly. The invention has the following advantages: the positioning accuracy and the bearing capacity of the steel pile are guaranteed, and the installation stability of the wind power booster station is guaranteed.
Description
The technical field is as follows:
the invention relates to the field of offshore wind power installation, in particular to an installation and construction process of an offshore wind power booster station.
Background art:
the offshore booster station comprises a pile foundation, a jacket and an upper assembly, wherein the pile foundation, the jacket and the upper assembly are sequentially arranged from bottom to top, the pile foundation is vertically driven into a seabed mud surface, and the pile foundation of the offshore booster station consists of four steel piles. At present marine wind power booster station when the installation construction, insert into seabed mud face with the pile foundation usually, correspond the supporting leg below the jacket and insert the steel-pipe pile in, at last with upper portion subassembly and jacket welded fastening, in the installation work progress, have following defect:
patent No. 201810622174.X an offshore wind turbine generator system pile foundation cushion cap foundation and a construction method thereof, disclosing a pile foundation piling process, and by means of a positioning die carrier facilitating pile sinking of a steel pile (steel pipe pile), as shown in fig. 6, the pile foundation piling process is composed of a truss support pile 10, a positioning truss 11 and a double-layer steel sleeve 24 surrounding the exterior of the truss support pile 10, when the positioning die carrier is installed and used, the truss support pile 10 is vertically driven into the sea bottom, then the positioning truss 11 and the double-layer steel sleeve 24 are inserted into the truss support pile 10 after being hoisted by an overwater hoisting platform, and are locked by locking bolts, then the steel pile (steel pipe pile) is driven, after the steel pile is driven, the positioning truss 11 and the double-layer steel sleeve 24 of the positioning die carrier are removed, and then the truss support pile 10 is removed;
firstly, the truss support pile 10 is of a single pile body structure, and for supporting the inserted and driven steel pile, the length of the truss support pile 10 is required to be longer, so that the hoisting and inserting driving of the truss support pile in offshore operation cannot be guaranteed in the aspect of verticality, an effective positioning function cannot be provided for the inserted and driven steel pile, the verticality of the steel pile is determined by the levelness of a positioning mould frame, then the positioning truss 11 and the double-layer steel sleeve 24 are locked and fixed with the truss support pile 10 through locking bolts, and on the premise that the verticality of the truss support pile 10 cannot be accurately guaranteed, the structural accuracy of manual locking is poorer, and the positioning accuracy cannot be guaranteed;
secondly, the structure of the positioning die carrier device of the truss support pile 10 is adopted, the vibration hammer and the winch are required to be started to pull up the truss support pile 10 during dismantling, as the length of the truss support pile 10 is longer, once shaking occurs during dismantling, the verticality of the steel pile which is already inserted and beaten around is influenced, the truss support pile 10 generates certain fluctuation to the seabed mud surface during the upward pulling process, the inserting and beating stability of the steel pile is influenced, and when the stability and the vertical precision of the steel pile cannot be accurately guaranteed, the stability of the whole wind power booster station cannot be guaranteed.
The invention content is as follows:
the invention aims to overcome the defects and provide an installation and construction process of an offshore wind power booster station, so that the positioning accuracy and the bearing capacity of a steel pile are ensured, and the installation stability of the wind power booster station is ensured.
The purpose of the invention is realized by the following technical scheme: an installation construction process of an offshore wind power booster station comprises a pile foundation, a jacket and an upper assembly which are sequentially connected from bottom to top, wherein the pile foundation consists of four steel pipe piles, and comprises the steps of preparing a ship, anchoring and taking place, pre-surveying, installing and positioning a formwork device, inserting and driving the steel pipe piles, cleaning soil in the steel pipe piles, repeatedly driving the steel pipe piles and measuring, installing the jacket, grouting underwater, cutting a non-slip block, installing and welding the upper assembly; the method comprises the following specific steps:
s1, preparing a ship: preparing a 1500t lifting engineering ship and a 4000t full-rotation lifting ship on a working site;
s2, anchoring in place: carrying out anchoring operation according to an anchoring operation program, carrying out anchoring in place by adopting an eight-point anchoring mode, and leading a 1500t lifting engineering ship to reach a designed installation position by tightly stranding anchor cables;
s3, pre-investigation: arranging a diver to launch to carry out pre-investigation on the sea bed surface of the designed installation area;
s4, installing and positioning the die carrier device: the positioning die carrier device comprises a plurality of cylinders and a plurality of piling sleeves, the upper end of each cylinder is fixedly connected with a mud pump, the upper end of each cylinder is also provided with a water injection mechanism, the outer side wall of the upper side of each cylinder is provided with a posture sensor, the outer side wall of any piling sleeve is bent upwards to be provided with an L-shaped measuring column, the upper end of each measuring column is provided with a prism, the prism is connected with a total station, and the total station, the water injection mechanism and the mud pump are controlled by a PLC system; during installation, the levelness of the positioning die carrier device is monitored in real time through the attitude sensor on the outer side wall of the cylinder, the elevation data of each pile driving sleeve is calculated through the total station measuring prism and the data of the attitude sensor, signals are fed back to the PLC control system, the PLC control system sends instructions to the mud pump at the top end of the cylinder so as to control the mud pumping speed of the mud pump, and the final levelness and elevation of the positioning die carrier device are controlled through the mud pumping speed of the mud pump;
s5, inserting and driving the steel pipe pile: welding a lifting lug for pile lifting in the head area of the steel pipe pile, lifting the pile by using a main hook of a floating crane, hanging a lifting rigging on a lifting lug of the pile lifting, lifting the hook of the crane to enable the steel pipe pile to be erected, then lifting the steel pipe pile into water, sleeving the steel pipe pile into a pile driving sleeve on a positioning formwork device, driving the steel pipe pile into a corresponding pile driving sleeve by using a pile driving hammer, injecting water into the bottom of a cylinder by using a water injection mechanism after the pile driving of four steel pipe piles is finished, and then lifting the positioning formwork device away by using the floating crane;
s6, cleaning soil in the steel pipe pile: the method comprises the following steps that soil in the steel pipe pile is removed by using an airlift mud pump, the airlift mud pump is designed to be of a specified length according to the mud pumping depth, the airlift mud pump is manufactured in advance, the airlift mud pump is hung into the steel pipe pile by using a lifting hook of a crane ship, the mud pumping end of the airlift mud pump is arranged in an inclined mode in the extending direction of the steel pipe pile, compressed air is supplied to the mud pump by an air compressor to pump mud, and after mud pumping is completed, a diver is arranged to launch the steel pipe pile by carrying a high-pressure water gun, and further washes the soil in the steel pipe pile;
s7, repeatedly driving the steel pipe pile and measuring: after 7-14 days of the steel pipe pile driving operation, performing repeated driving operation on one steel pipe pile and arranging a measurer to measure the top elevation of the steel pipe pile;
s8, jacket installation: adjusting the height of a base plate at the bottom of a jacket according to the data measured by the top elevation of the steel pipe pile, after soil in the steel pipe pile is cleaned, a diver underwater installs a 25cm-30cm concrete interlayer into the steel pipe pile, the jacket is hoisted by a 1500t floating crane, the 1500t floating crane hoists the jacket into water and then inserts the jacket into the steel pipe pile, the diver is arranged to launch for observation, and a commander adjusts the direction and the span of the crane according to the underwater cleaning to insert supporting legs at the lower end of the jacket into the corresponding steel pipe pile;
s9, underwater grouting: grouting through a grouting machine in an annular space formed between the support legs at the lower end of the jacket and the corresponding steel pipe piles, and pressing grouting materials into the annular space by the grouting machine until the top of the annular space is at a grout overflow position;
s10, cutting the anti-slip blocks: arranging a diver to launch water to cut the anti-slip blocks at the bottom of the jacket after the slurry is solidified;
s11, mounting and welding an upper assembly: the upper assembly is hoisted by adopting a 4000t full-circle slewing crane ship, four-point vertical hoisting is realized by the upper assembly through a hoisting rigging of the crane ship, and the included angle between a hoisting rope and a plumb line is not more than 5 degrees; and hoisting the upper part assembly, and arranging a welder to weld the upper part assembly and the jacket after the upright column on the upper part assembly is completely placed on the jacket.
The invention is further improved in that: in step S4, the multiple pile driving sleeves are disposed outside the multiple cylinders, centers formed by the multiple cylinders and centers formed by the multiple pile driving sleeves are concentrically disposed, the multiple cylinders and the multiple pile driving sleeves are fixedly connected by a support frame set, and upper end surfaces of the cylinders protrude out of upper end surfaces of the pile driving sleeves; the outlet end of the mud pump is communicated with a pipeline, and the pipeline penetrates through the cylinder from top to bottom.
The invention is further improved in that: the water injection mechanism comprises a centrifugal pump, a pressure gauge and a water injection pipe, wherein the centrifugal pump, the pressure gauge and the water injection pipe are arranged at the upper end of the cylinder, and the water injection pipe penetrates through the cylinder from top to bottom.
The invention is further improved in that: the support frame group comprises a first support rod connected with two adjacent cylinders and a second support rod connected with the two cylinders at opposite angles, the first support rod and the second support rod are horizontally arranged, and the first support rod and the second support rod are arranged at the upper side positions of the cylinders;
the support frame group also comprises a third support rod connected with two adjacent piling sleeves, the outer side wall of each cylinder obliquely extends towards the corresponding piling sleeve to form a first inclined rod, and the center of each first support rod obliquely extends towards the corresponding piling sleeves on two sides to form a second inclined rod.
The invention is further improved in that: the cylinder comprises an upper cylinder body and a lower cylinder body which are vertically embedded, the upper end of the lower cylinder body is convexly arranged in the direction of the upper cylinder body, the lower end surface of the upper cylinder body is provided with a notch for accommodating the upper end of the lower cylinder body to be embedded, two sides of the lower cylinder body are respectively provided with a vertically arranged hydraulic cylinder, the driving end of the hydraulic cylinder is fixedly connected with the lower end surface of the upper cylinder body, and meanwhile, the upper cylinder body is fixedly connected with the support frame group;
when the final levelness and the elevation of the positioning die carrier device are not within the preset values, the PLC control system sends a signal instruction to the hydraulic cylinder to drive the hydraulic cylinder to lift, so that the levelness and the elevation of each position of the piling sleeves are within the preset values.
The invention is further improved in that: the upper end of the piling sleeve is provided with a guide port which spreads outwards.
The invention is further improved in that: in step S1, the 1500t crane ship is used for construction and installation of on-site jacket and pile foundation, grouting construction, material equipment, and the 4000t full-circle crane ship is used for installation of upper assembly.
The invention is further improved in that: in step S3, the pre-survey content includes survey of the flatness of the surface of the sea bed in the installation area and the presence of sea pipes, sea cables, and anchor cables.
The invention is further improved in that: in step S11, the hoist rigging of the crane ship includes two horizontally corresponding suspension beams, the upper end of the suspension beam is provided with a first shackle, the lower end of the suspension beam is provided with a second shackle, the first shackle and the lifting hook of the crane ship are connected by a first wire rope loop, the upper end of the upper assembly is provided with four third shackles, the third shackles form a rectangular structure, the third shackles and the corresponding second shackles are connected by a second wire rope loop, and the second wire rope loop is vertically arranged.
The invention is further improved in that: the rated load of the first shackle is 1250T, the rated loads of the second shackle and the third shackle are both 1000T, the specification of the first steel wire rope ring is phi 282mm multiplied by 15m, the specification of the second steel wire rope ring is phi 258mm multiplied by 10m, the included angle between the first steel wire rope ring and the hanging beam is 65 degrees, and the included angle between the second steel wire rope ring and the upper assembly is 77 degrees.
Compared with the prior art, the invention has the following advantages:
1. the invention changes the traditional positioning formwork device, adopts a plurality of interconnected cylinder structures to replace truss support piles with longer length, can ensure the horizontal stability of the positioning formwork device, can greatly shorten the longitudinal length of the cylinder, is convenient for the positioning formwork device to be quickly positioned to a seabed mud surface layer, controls the elevation of the positioning formwork device by pumping mud of the seabed mud surface layer at a preset position by a mud pump and the speed of the mud pump when the positioning formwork device is positioned and installed, and realizes quick disassembly by injecting water into the seabed mud surface layer by a water injection mechanism and hoisting when the positioning formwork device is disassembled; the total station accurately measures the prism, combines attitude data of the attitude sensors, calculates elevation data of each piling sleeve, monitors the levelness of the positioning formwork device in real time through the attitude sensors on the circumference of the cylinder, controls the mud entering speed of each cylinder by controlling the speed of a mud pump at the upper end of the cylinder so as to control the levelness and the final elevation of the whole positioning formwork device, and finely levels the height of the piling sleeve by the hydraulic cylinder, so that the levelness and the stroke height of the positioning formwork device are ensured, and the positioning accuracy of the steel pipe pile in the piling sleeve of the positioning formwork device is ensured.
2. The steel pipe pile after insertion is subjected to mud pumping work through the obliquely arranged air-lift mud pumping device, and the obliquely arranged mud pumping device has a certain guiding effect on mud at a mud pumping end, so that the mud pumping efficiency is improved; the mixed density of the water and the air in the mud pump is lower than the density of the water around the mud pump, so that pressure difference is generated, and lifting force is generated on the mud in the mud pump.
Description of the drawings:
fig. 1 is a schematic structural diagram of a positioning formwork device of the present invention.
Fig. 2 is a sectional view taken along line a-a of fig. 1.
Figure 3 is a schematic view of the connection of the lifting rigging of the invention to the upper assembly.
Figure 4 is a side view of the connection of the hoisting rigging of the invention to the upper assembly.
Fig. 5 is a schematic view of the position of the upper assembly of the present invention hoisted over the jacket.
Fig. 6 is a schematic structural view of a positioning jig according to the prior art of the present invention.
Reference numbers in the figures:
1-cylinder, 2-piling sleeve, 3-support frame group, 4-mud pump, 5-water injection mechanism, 6-pipeline, 7-attitude sensor, 8-measuring column, 9-prism, 10-guide opening, 11-upper cylinder, 12-lower cylinder, 13-notch, 14-hydraulic cylinder, 15-steel pipe pile, 16-hanging beam, 17-first shackle, 18-second shackle, 19-first steel wire rope loop, 20-second steel wire rope loop, 21-third shackle, 22-guide frame, 23-upper component and 24-hook;
31-a first support bar, 32-a second support bar, 33-a third support bar, 34-a first tilting bar, 35-a second tilting bar;
51-centrifugal pump, 52-pressure gauge, 53-water injection pipe;
60-hoisting component, 601-first lifting lug, 602-second lifting lug, 603-third lifting lug, 604-fourth lifting lug, 605-lifting rope group, 6051-shackle a, 6052-first steel wire rope, 6053-shackle b, 6054-second steel wire rope and 6055-third steel wire rope.
The specific implementation mode is as follows:
for the purpose of enhancing the understanding of the present invention, the present invention will be further described in detail with reference to the following examples and the accompanying drawings, which are only used for explaining the present invention and are not to be construed as limiting the scope of the present invention.
The installation and construction process of the offshore wind power booster station comprises a pile foundation, a jacket 22 and an upper assembly 23 which are sequentially connected from bottom to top, wherein the pile foundation consists of four steel pipe piles 15, and comprises the steps of preparing a ship, anchoring and taking place, pre-surveying, installing a positioning formwork device, inserting and driving the steel pipe piles, cleaning soil in the steel pipe piles, repeatedly driving the steel pipe piles and measuring, installing the jacket, grouting underwater, cutting a slip-resistant block, installing and welding the upper assembly; the method comprises the following specific steps:
s1, preparing a ship: preparing a 1500t lifting engineering ship and a 4000t full-rotation lifting ship on a working site;
s2, anchoring in place: carrying out anchoring operation according to an anchoring operation program, carrying out anchoring in place by adopting an eight-point anchoring mode, and leading a 1500t lifting engineering ship to reach a designed installation position by tightly stranding anchor cables;
s3, pre-investigation: arranging a diver to launch to carry out pre-investigation on the sea bed surface of the designed installation area;
s4, installing and positioning the die carrier device: the positioning die carrier device comprises a plurality of cylinders 1 and a plurality of piling sleeves 2, the upper end of each cylinder 1 is fixedly connected with a mud pump 4, the upper end of each cylinder 1 is also provided with a water injection mechanism 5, the outer side wall of the upper side of each cylinder 1 is provided with a posture sensor 7, the outer side wall of any piling sleeve 2 is bent upwards to be provided with an L-shaped measuring column 8, the upper end of each measuring column 8 is provided with a prism 9, the prism 9 is connected with a total station, and the total station, the water injection mechanism 5 and the mud pump 4 are controlled by a PLC system; during installation, the levelness of the positioning die carrier device is monitored in real time through the attitude sensor 7 on the outer side wall of the cylinder 1, the elevation data of each pile driving sleeve 2 is calculated through the total station measuring prism 9 and combined with the data of the attitude sensor 7, signals are fed back to the PLC control system, the PLC control system sends instructions to the mud pump 4 at the top end of the cylinder 1 so as to control the mud pumping speed of the mud pump 4, and the final levelness and elevation of the positioning die carrier device are controlled through the mud pumping speed of the mud pump 4;
s5, inserting and driving the steel pipe pile: welding a lifting lug for pile lifting in the head area of the steel pipe pile 15, lifting the pile by using a main hook of a floating crane, hanging a lifting rigging on a lifting lug of the pile lifting, lifting the hook of the crane to enable the steel pipe pile 15 to be erected, then lifting the steel pipe pile 15 into water, sleeving the steel pipe pile 15 into a pile driving sleeve 2 on a positioning formwork device, driving the steel pipe pile 15 into the corresponding pile driving sleeve 2 by using a pile driving hammer, injecting water into the bottom of a cylinder 1 through a water injection mechanism 5 after the pile driving of four steel pipe piles 15 is finished, and then lifting the positioning formwork device away by using the floating crane;
s6, cleaning soil in the steel pipe pile: the method comprises the following steps that soil in a steel pipe pile 15 is removed through an airlift mud pump, the airlift mud pump is designed to be of a specified length according to mud pumping depth, the airlift mud pump is manufactured in advance, the airlift mud pump is hung into the steel pipe pile 15 through a lifting hook of a crane ship, a mud pumping end of the airlift mud pump is arranged in an inclined mode in the extending direction of the steel pipe pile 15, compressed air is supplied to the mud pump through an air compressor to pump mud, after mud pumping is completed, a diver is arranged to launch, a high-pressure water gun is carried into the steel pipe pile 15, and the soil in the steel pipe pile 15 is further flushed;
s7, repeatedly driving the steel pipe pile and measuring: after 7-14 days of the piling operation of the steel pipe piles 15, performing repeated piling operation on one steel pipe pile 15 and arranging a measurer to measure the top elevation of the steel pipe pile 15;
s8, jacket installation: according to the data measured by the top elevation of the steel pipe pile 15, the height of a base plate at the bottom of a jacket 22 is adjusted, after soil in the steel pipe pile 15 is cleaned, a diver installs a 25cm-30cm concrete interlayer into the steel pipe pile 15 under water, the jacket 22 is hoisted by a 1500t floating crane, the 1500t floating crane hoists the jacket 22 into water and inserts the jacket into the steel pipe pile 15 for operation, the diver is arranged to observe the underwater, and a commander adjusts the crane direction and span according to the underwater cleaning to insert supporting legs at the lower end of the jacket 22 into the corresponding steel pipe pile 15;
s9, underwater grouting: grouting is carried out in an annular space formed between the supporting legs at the lower end of the jacket 22 and the corresponding steel pipe piles 15 through a grouting machine, and grouting materials are pressed into the annular space by the grouting machine until the top of the annular space is at a grout overflow position;
s10, cutting the anti-slip blocks: after the slurry is solidified, arranging a diver to launch to cut the anti-slip blocks at the bottom of the jacket 22;
s11, mounting and welding an upper assembly: the upper assembly 23 is hoisted by adopting a 4000t full-circle slewing crane ship, four-point vertical hoisting is realized on the upper assembly 23 through a hoisting rigging of the crane ship, and the included angle between a hoisting rope and a plumb line is not more than 5 degrees; as shown in fig. 5, the upper assembly 23 is lifted, and after the upright posts on the upper assembly 23 are completely placed on the jacket 22, a welder is arranged to weld the upper assembly 23 to the jacket 22.
Further, in step S4, as shown in fig. 1 and 2, the multiple piling sleeves 2 are disposed outside the multiple cylinders 1, a center formed by the multiple cylinders 1 and a center formed by the multiple piling sleeves 2 are concentrically disposed, the multiple cylinders 1 and the multiple piling sleeves 2 are fixedly connected by the support frame set 3, and an upper end surface of each cylinder 1 is disposed to protrude beyond an upper end surface of each piling sleeve 2; the outlet end of the dredge pump 4 is communicated with the pipeline 6, the pipeline 6 penetrates through the cylinder 1 from top to bottom, the water injection mechanism 5 comprises a centrifugal pump 51, a pressure gauge 52 and a water injection pipe 53, the centrifugal pump is arranged at the upper end of the cylinder 1, and the water injection pipe 53 penetrates through the cylinder 1 from top to bottom.
Further, the support frame group 3 comprises a first support rod 31 connecting two adjacent cylinders 1 and a second support rod 32 connecting two cylinders 1 at opposite angles, the first support rod 31 and the second support rod 32 are horizontally arranged, and the first support rod 31 and the second support rod 32 are arranged at the upper side positions of the cylinders 1;
the support frame set 3 further comprises a third support bar 33 connecting two adjacent piling sleeves 2, the outer side wall of the cylinder 1 extends obliquely towards the corresponding piling sleeve 2 to form a first inclined bar 34, and the central position of the first support bar 31 extends obliquely towards the corresponding piling sleeve 2 on both sides to form a second inclined bar 32.
Further, the cylinder 1 comprises an upper cylinder body 11 and a lower cylinder body 12 which are vertically embedded, the upper end of the lower cylinder body 12 protrudes towards the upper cylinder body 11, the lower end face of the upper cylinder body 11 is provided with a notch 13 for accommodating the upper end of the lower cylinder body 12, two sides of the lower cylinder body 12 are respectively provided with a hydraulic cylinder 14 which is vertically arranged, the driving end of the hydraulic cylinder 14 is fixedly connected with the lower end face of the upper cylinder body 11, and meanwhile, the upper cylinder body 11 is fixedly connected with the support frame group 3;
when the final levelness and the elevation of the positioning formwork device are not within the preset values, the PLC control system sends a signal command to the hydraulic cylinder 14 to drive the hydraulic cylinder 14 to lift, so that the levelness and the elevation of each position of the piling sleeves 2 are within the preset values.
The invention changes the traditional positioning formwork device, adopts a plurality of interconnected cylinder structures to replace truss support piles with longer length, can ensure the horizontal stability of the positioning formwork device, can greatly shorten the longitudinal length of the cylinder, is convenient for the positioning formwork device to be quickly positioned to a seabed mud surface layer, controls the elevation of the positioning formwork device by pumping mud of the seabed mud surface layer at a preset position by a mud pump 4 and the speed of the mud pump when the positioning formwork device is positioned and installed, and realizes quick removal by injecting water into the seabed mud surface layer by a water injection mechanism 5 and hoisting when the positioning formwork device is removed; the total station accurately measures the prism 9, combines attitude data of the attitude sensor 7, calculates elevation data of each pile driving sleeve 2, monitors the levelness of the positioning formwork device in real time through the attitude sensor 7 on the circumference of the cylinder 1, controls the mud entering speed of each cylinder 1 by controlling the speed of the mud pump 4 at the upper end of the cylinder 1 so as to control the levelness and the final elevation of the whole positioning formwork device, and finely levels the height of the pile driving sleeve 2 through the hydraulic cylinder 14, so that the levelness and the height of the positioning formwork device are ensured, and the positioning accuracy of inserting the steel pipe pile 15 into the pile driving sleeve 2 of the positioning formwork device is ensured.
The steel pipe pile after insertion is subjected to mud pumping work through the obliquely arranged air-lift mud pumping device, and the obliquely arranged mud pumping device has a certain guiding effect on mud at a mud pumping end, so that the mud pumping efficiency is improved; the mixed density of the water and the air in the mud pump is lower than the density of the water around the mud pump, so that pressure difference is generated, and lifting force is generated on the mud in the mud pump.
Further, the upper end of the piling sleeve 2 has a divergent guide opening 10.
Further, in step S1, the 1500t crane ship is used for construction and installation of the on-site jacket 22 and pile foundation, grouting construction, material equipment, and the 4000t full circle crane ship is used for installation of the upper assembly 23.
Further, in step S3, the pre-survey content includes survey of the flatness of the surface of the sea bed in the installation area and the presence of sea pipes, sea cables, and anchor cables.
Further, in step S11, as shown in fig. 3 and 4, the hoisting rigging of the crane ship includes two horizontally disposed corresponding hoisting beams 16, the upper end of the hoisting beam 16 is provided with a first shackle 17, the lower end of the hoisting beam 16 is provided with a second shackle 18, the first shackle 17 is connected to the hook 24 of the crane ship through a first wire loop 19, the upper end of the upper assembly 23 is provided with four third shackles 21, the third shackles 21 form a rectangular structure, the third shackles 21 are connected to the corresponding second shackles 18 through a second wire loop 20, and the second wire loop 20 is vertically disposed;
the rated load of the first shackle 17 is 1250T, the rated loads of the second shackle 18 and the third shackle 21 are both 1000T, the specification of the first wire rope loop 19 is phi 282mm multiplied by 15m, the specification of the second wire rope loop 20 is phi 258mm multiplied by 10m, the included angle between the first wire rope loop 19 and the hanging beam 16 is 65 degrees, and the included angle between the second wire rope loop 20 and the upper component 23 is 77 degrees.
The upper assembly 23 realizes four-point vertical hoisting through a hoisting rigging of the crane ship, and the stability of the upper assembly 23 in the hoisting process is ensured.
It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. An installation construction process of an offshore wind power booster station comprises a pile foundation, a jacket (22) and an upper assembly (23) which are sequentially connected from bottom to top, wherein the pile foundation consists of four steel pipe piles (15), and is characterized by comprising the steps of preparing a ship, anchoring and taking place, pre-surveying, installing and positioning a formwork device, inserting and driving the steel pipe piles, cleaning soil in the steel pipe piles, re-driving the steel pipe piles and measuring, installing the jacket, grouting underwater, cutting a slip-proof block, installing and welding the upper assembly; the method comprises the following specific steps:
s1, preparing a ship: preparing a 1500t lifting engineering ship and a 4000t full-rotation lifting ship on a working site;
s2, anchoring in place: carrying out anchoring operation according to an anchoring operation program, carrying out anchoring in place by adopting an eight-point anchoring mode, and leading a 1500t lifting engineering ship to reach a designed installation position by tightly stranding anchor cables;
s3, pre-investigation: arranging a diver to launch to carry out pre-investigation on the sea bed surface of the designed installation area;
s4, installing and positioning the die carrier device: the positioning die carrier device comprises a plurality of cylinders (1) and a plurality of piling sleeves (2), the upper end of each cylinder (1) is fixedly connected with a mud pump (4), the upper end of each cylinder (1) is also provided with a water injection mechanism (5), the outer side wall of the upper side of each cylinder (1) is provided with a posture sensor (7), the outer side wall of any piling sleeve (2) is bent upwards to be provided with an L-shaped measuring column (8), the upper end of each measuring column (8) is provided with a prism (9), the prism (9) is connected with a total station, and the total station, the water injection mechanisms (5) and the mud pumps (4) are controlled by a PLC system; during installation, real-time monitoring is carried out on the levelness of the positioning formwork device through an attitude sensor (7) on the outer side wall of the cylinder (1), elevation data of each pile driving sleeve (2) is calculated through a total station measuring prism (9) and by combining data of the attitude sensor (7), signals are fed back to a PLC control system, the PLC control system sends an instruction to a mud pump (4) at the top end of the cylinder (1) so as to control the mud pumping speed of the mud pump (4), and the final levelness and elevation of the positioning formwork device are controlled through the mud pumping speed of the mud pump (4);
s5, inserting and driving the steel pipe pile: welding lifting lugs for pile lifting in the head area of the steel pipe pile (15), lifting the pile by using a main hook of a floating crane, hanging a lifting rigging on a lifting lug of the pile, lifting the hook by using the crane to enable the steel pipe pile (15) to be vertical, then lifting the steel pipe pile (15) into water, sleeving the steel pipe pile into a pile driving sleeve (2) on a positioning formwork device, driving the steel pipe pile (15) into the corresponding pile driving sleeve (2) by using a pile driving hammer, injecting water into the bottom of a cylinder (1) through a water injection mechanism (5) after the pile driving of the four steel pipe piles (15) is finished, and then lifting the positioning formwork device away by using the floating crane;
s6, cleaning soil in the steel pipe pile: mud in the steel pipe pile (15) is cleared by using an airlift mud pump, the airlift mud pump is designed into a specified length according to the mud pumping depth, the airlift mud pump is manufactured in advance, the airlift mud pump is hung into the steel pipe pile (15) by using a lifting hook of a crane ship, the mud pumping end of the airlift mud pump is arranged in an inclined manner in the extending direction of the steel pipe pile (15), compressed air is supplied to the mud pump by an air compressor for mud pumping operation, after mud pumping is finished, a diver is arranged to launch, a high-pressure water gun is carried into the steel pipe pile (15), and the mud in the steel pipe pile (15) is further flushed;
s7, repeatedly driving the steel pipe pile and measuring: after 7-14 days of the steel pipe pile driving operation, performing repeat driving operation on one steel pipe pile (15) and arranging a measurer to measure the top elevation of the steel pipe pile (15);
s8, jacket installation: according to the data measured by the top elevation of the steel pipe pile (15), the height of a base plate at the bottom of a jacket (22) is adjusted, after soil in the steel pipe pile (15) is cleaned, a diver installs a 25cm-30cm concrete interlayer into the steel pipe pile (15) underwater, the jacket (22) is hoisted through a 1500t floating crane, after the jacket (22) is hoisted into water by the 1500t floating crane, the diver inserts the jacket into the steel pipe pile (15) to operate, arranges the diver to observe the underwater condition, and a commander adjusts the direction and the span of the crane according to the underwater cleaning so that support legs at the lower end of the jacket (22) are inserted into the corresponding steel pipe pile (15);
s9, underwater grouting: grouting is carried out in an annular space formed between the supporting legs at the lower end of the jacket (22) and the corresponding steel pipe piles (15) through a grouting machine, and grouting materials are pressed into the annular space by the grouting machine until the top of the annular space is at a grout overflow position;
s10, cutting the anti-slip blocks: arranging a diver to launch water to cut the anti-slip blocks at the bottom of the jacket (22) after the slurry is solidified;
s11, mounting and welding an upper assembly: the upper assembly (23) is hoisted by adopting a 4000t full-circle-turning hoisting vessel, four-point vertical hoisting is realized on the upper assembly (23) through a hoisting rigging of the hoisting vessel, and the included angle between a hoisting rope and a plumb line is not more than 5 degrees; and hoisting the upper assembly (23), and arranging a welder to weld the upper assembly (23) and the jacket (22) after the upright column on the upper assembly (23) is completely placed on the jacket (22).
2. The offshore wind power booster station installation and construction process according to claim 1, wherein in the step S4, the multiple piling sleeves (2) are arranged outside the multiple cylinders (1), the centers formed by the multiple cylinders (1) and the multiple piling sleeves (2) are concentrically arranged, the multiple cylinders (1) and the multiple piling sleeves (2) are fixedly connected through the support frame set (3), and the upper end faces of the cylinders (1) are arranged to protrude out of the upper end faces of the piling sleeves (2); the outlet end of the mud pump (4) is communicated with a pipeline (6), and the pipeline (6) penetrates through the cylinder (1) from top to bottom.
3. The installation and construction process of the offshore wind power booster station according to claim 2, characterized in that the water injection mechanism (5) comprises a centrifugal pump (51) arranged at the upper end of the cylinder (1), a pressure gauge (52) and a water injection pipe (53), and the water injection pipe (53) penetrates through the cylinder (1) from top to bottom.
4. The installation and construction process of an offshore wind power booster station according to claim 2, characterized in that the support frame set (3) comprises a first support rod (31) connecting two adjacent cylinders (1) and a second support rod (32) connecting two cylinders (1) at opposite angular positions, the first support rod (31) and the second support rod (32) are horizontally arranged, and the first support rod (31) and the second support rod (32) are arranged at the upper side positions of the cylinders (1);
the supporting frame group (3) further comprises a third supporting rod (33) connected with two adjacent piling sleeves (2), the outer side wall of each cylinder (1) obliquely extends towards the corresponding piling sleeve (2) to form a first inclined rod (34), and the center position of each first supporting rod (31) obliquely extends towards the corresponding piling sleeves (2) on two sides to form second inclined rods (32).
5. The mounting construction process of the offshore wind power booster station according to claim 4, characterized in that the cylinder (1) comprises an upper cylinder body (11) and a lower cylinder body (12) which are vertically embedded, the upper end of the lower cylinder body (12) is convexly arranged towards the upper cylinder body (11), the lower end surface of the upper cylinder body (11) is provided with a notch (13) for accommodating the upper end of the lower cylinder body (12), two sides of the lower cylinder body (12) are respectively provided with a vertically arranged hydraulic cylinder (14), the driving end of the hydraulic cylinder (14) is fixedly connected with the lower end surface of the upper cylinder body (11), and meanwhile, the upper cylinder body (11) is fixedly connected with the support frame group (3);
when the final levelness and the elevation of the positioning formwork device are not within the preset values, the PLC control system sends a signal command to the hydraulic cylinder (14) to drive the hydraulic cylinder (14) to lift, so that the levelness and the elevation of each position of the piling sleeves (2) are within the preset values.
6. Process for the installation and construction of an offshore wind power booster station according to any of the claims 1 to 5, characterized in that the upper end of the piling sleeve (2) has an outwardly diverging pilot opening (10).
7. The process of claim 1, wherein in step S1, the 1500t lifting engineering vessel is used for construction and installation of the on-site jacket (22) and pile foundation, grouting construction and material equipment, and the 4000t full-circle lifting vessel is used for installation of the upper assembly (23).
8. The installation and construction process of an offshore wind power booster station according to claim 1, wherein in step S3, the pre-survey content includes survey of flatness of the sea floor surface of the installation area and the existence of sea pipes, sea cables and anchor cables.
9. The installation and construction process of an offshore wind power booster station according to claim 1, characterized in that in step S11, the hoisting rigging of the crane ship comprises two horizontally correspondingly arranged hoisting beams (16), the upper end of each hoisting beam (16) is provided with a first shackle (17), the lower end of each hoisting beam (16) is provided with a second shackle (18), the first shackles (17) are connected with the lifting hooks (24) of the crane ship through first steel wire rope loops (19), the upper end of each upper assembly (23) is provided with four third shackles (21), the third shackles (21) form a rectangular structure, the third shackles (21) are connected with the corresponding second shackles (18) through second steel wire rope loops (20), and the second steel wire rope loops (20) are vertically arranged.
10. The mounting construction process of the offshore wind power booster station according to claim 9, characterized in that the rated load of the first shackle (17) is 1250T, the rated loads of the second shackle (18) and the third shackle (21) are both 1000T, the first wire rope loop (19) has a specification of phi 282mm x 15m, the second wire rope loop (20) has a specification of phi 258mm x 10m, the included angle between the first wire rope loop (19) and the lifting beam (16) is 65 degrees, and the included angle between the second wire rope loop (20) and the upper component (23) is 77 degrees.
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| CN202011315423.4A CN112411603A (en) | 2020-11-21 | 2020-11-21 | Installation and construction process of offshore wind power booster station |
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| CN115198788A (en) * | 2022-09-13 | 2022-10-18 | 南通泰胜蓝岛海洋工程有限公司 | Jacket hoisting construction process |
| CN115467365A (en) * | 2022-09-30 | 2022-12-13 | 华电重工股份有限公司 | Installation method of overwater booster station foundation |
| CN116038315A (en) * | 2022-09-13 | 2023-05-02 | 中国铁建港航局集团有限公司 | Marine docking method for ultra-large components |
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| CN115467365A (en) * | 2022-09-30 | 2022-12-13 | 华电重工股份有限公司 | Installation method of overwater booster station foundation |
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