CN114808897B - Method for installing pile legs of wind power installation platform by gantry crane bearing crane - Google Patents
Method for installing pile legs of wind power installation platform by gantry crane bearing crane Download PDFInfo
- Publication number
- CN114808897B CN114808897B CN202210369650.8A CN202210369650A CN114808897B CN 114808897 B CN114808897 B CN 114808897B CN 202210369650 A CN202210369650 A CN 202210369650A CN 114808897 B CN114808897 B CN 114808897B
- Authority
- CN
- China
- Prior art keywords
- pile
- lifting
- leg
- pile leg
- lug
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000009434 installation Methods 0.000 title claims abstract description 41
- 238000000034 method Methods 0.000 title claims abstract description 38
- 238000004519 manufacturing process Methods 0.000 claims abstract description 7
- 229910000831 Steel Inorganic materials 0.000 claims description 30
- 239000010959 steel Substances 0.000 claims description 30
- 238000003466 welding Methods 0.000 claims description 18
- 230000003014 reinforcing effect Effects 0.000 claims description 13
- 238000007789 sealing Methods 0.000 claims description 13
- 230000001154 acute effect Effects 0.000 claims description 11
- 238000004080 punching Methods 0.000 claims description 3
- 230000011218 segmentation Effects 0.000 claims description 2
- 239000002023 wood Substances 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract description 9
- 230000008901 benefit Effects 0.000 abstract description 3
- 238000011900 installation process Methods 0.000 abstract description 2
- 238000012545 processing Methods 0.000 abstract description 2
- 238000007667 floating Methods 0.000 description 6
- 230000002159 abnormal effect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- FGUUSXIOTUKUDN-IBGZPJMESA-N C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 Chemical compound C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 FGUUSXIOTUKUDN-IBGZPJMESA-N 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
Abstract
A method for installing pile legs of a wind power installation platform by a gantry crane in a bearing manner, wherein 600 tons of gantry is used as hoisting equipment, the pile legs with the total length of 82.6 meters are divided into a lower pile leg and an upper pile leg, and the two parts are sequentially hoisted and installed, and the method comprises the following steps: a. manufacturing pile legs; b. transporting pile legs; c. unloading the spud leg; d. hoisting and installing the lower pile leg; e. lifting the pile shoe; f. and hoisting and installing the upper pile leg. The method utilizes general equipment of a general assembly shipyard, namely 600 tons of gantry cranes, to install the spud legs with the height of 82.6 meters, fully utilizes the existing equipment and facilities in the installation process, comprehensively considers the hoisting and transportation capacities of a construction site, and divides the spud legs into two parts for processing and installation. Through statistics, the purchasing cost of the manufacturing tool and the sling tool required by the method is about 3 ten thousand yuan, the period of sectionally turning over and installing the single upper pile leg is about 0.5 day, the economic benefit is greatly improved, and the construction period is shortened.
Description
Technical Field
The invention relates to a method for installing pile legs of an ultra-high wind power installation platform by using a general 600-ton gantry crane, belonging to the technical field of ships and ocean engineering equipment.
Background art
The offshore wind energy resource is rich, compared with the onshore wind power, the offshore wind power has the advantages of stable wind power, high utilization rate of the fan, no occupation of land and the like, and the offshore wind power development is positively promoted. The spud leg is one of the most important and critical structures of the self-elevating wind power installation platform, and is large in size and complex in structure. The self-elevating wind power installation platform is generally provided with 4 pile legs, and the lower part of each pile leg is provided with a pile shoe. The pile leg of the self-elevating wind power installation platform of the cylindrical pile leg is matched with the hydraulic pin type lifting system to realize lifting of the platform, pin holes matched with the lifting system are formed in the side wall of the pile leg, the pile leg is of a hollow structure, the lower end of the pile leg is fixed on a pile shoe with the hollow inside, and the inner cavity of the pile leg is communicated with the inner cavity of the pile shoe. The pile leg is used for supporting the weight of the main hull at the upper part of the wind power installation platform and bearing environmental loads such as wind, waves and currents, when the self-elevating wind power installation platform is operated, the platform needs to be lifted to a safe height above the sea surface through the lifting mechanism, pile insertion of the pile leg is carried out, and the pile shoe is used for supporting the whole platform. The pile leg construction and installation technology is the core of the self-elevating wind power installation platform construction. The total height of the pile shoe and the pile leg of the large wind power installation platform exceeds 85m, the weight of the steel structure of the pile shoe and the pile leg is 760 tons, and the weight of outfitting is 20 tons, and the pile shoe and the pile leg are usually constructed by welding steel plates. Because the pile leg length is ultrahigh, the pile leg needs to be built in sections and then assembled, the crane lifting capacity of a general assembly shipyard is fully considered when the pile leg is segmented, the number of pile leg lengthening and folding joints is reduced by adopting the minimum number of segments, the work of pile leg overhead operation and the like is reduced, the building period of the whole platform is shortened, and the precision in the assembly process is ensured. At present, the conventional practice of the mainstream marine shipyard is that when a wind power platform is built in land or dock, the maximum pile leg can be lengthened by 2-3 sections based on the crane capacity limit, and the height is usually about 60 m; extension of subsequent spud legs is carried out in the wharf construction process, large floating cranes are needed to be rented for installation, and the large floating cranes are adopted for turning over and installing the upper spud leg sections in place. The conventional method has the problems of high cost and long installation time, and the period of turning over and installing the upper pile leg of the floating crane is about 4 days. The 600-ton gantry crane is general equipment of a final assembly shipyard, the existing equipment resources of the final assembly shipyard are utilized, the lifting and transportation capacity of a construction site is comprehensively considered, and the method for installing the ultra-high pile leg of the wind power installation platform by using the 600-ton gantry crane is very necessary under the conditions of short time and low cost.
Disclosure of Invention
The invention provides a method for installing a pile leg of a wind power installation platform by a gantry crane, which uses a 600 ton gantry as basic hoisting equipment, divides the pile leg into two sections of hoisting, and realizes the installation of the ultra-high pile leg with low cost and short time by matching with the design of a reinforced lifting lug structure and the improvement of a hoisting method.
The invention is realized by the following technical scheme:
a method for installing pile legs of a wind power installation platform by a gantry crane in a bearing manner, wherein 600 tons of gantry is used as hoisting equipment, the pile legs with the total length of 82.6 meters are divided into a lower pile leg and an upper pile leg, and the two parts are sequentially hoisted and installed, and the method comprises the following steps:
a. Pile leg manufacturing: the lower pile leg and the upper pile leg manufactured in a segmentation way are transported into a small harbor pool of a final assembly shipyard through a large transport ship, two sets of lower lifting lugs are symmetrically arranged at the lower parts of the upper pile leg and the lower pile leg respectively, an X-shaped reinforcing lifting lug structure is arranged at the upper end of the lower pile leg, and an I-shaped reinforcing lifting lug structure is arranged at the upper end of the upper pile leg;
b. And (3) pile leg transportation: transporting the lower spud leg and the upper spud leg into a small harbor pool of a final assembly shipyard by adopting a large transport ship;
c. Pile leg ship unloading: the lower pile leg and the upper pile leg are dismounted by using a 600 ton gantry crane and placed on a bracket in a dock, and the long direction of the pile leg is parallel to a main beam of the gantry crane;
d. Hoisting and installing the lower pile leg: the steel wire ropes on the 3# lifting hooks of the 600 ton gantry crane are connected with shackles of the X-shaped reinforced lifting lug structures of the lower pile legs, the steel wire ropes of the 1# lifting hooks and the 2# lifting hooks are respectively connected with shackles of two sets of lower lifting lugs of the lower pile legs, the 1# lifting hooks and the 2# lifting hooks slowly descend after the lower pile legs are lifted to be more than 40 meters away from the ground, the lower pile legs slowly stand upright, the lower pile legs stand on a square, shackles on the lower lifting lugs are removed, the 1# lifting hooks and the 2# lifting hooks are removed, and the lower lifting lugs are manually cut off; lifting a 3# lifting hook, lifting a lower pile leg to a pile shoe position, enabling the length direction of the pile shoe to be perpendicular to a gantry crane girder, and after the lower end of the lower pile leg is completely aligned with the pile shoe, enabling constructors to start fine adjustment and alignment, sealing and fixing the upper part and the lower bevel positions of a pile fixing chamber by using a wooden wedge, ensuring that the pile leg is in a sealing state before welding, confirming that the lower end of the lower pile leg is completely aligned with the pile shoe, and welding the lower pile leg and the pile shoe;
e. lifting the pile shoe: after the lower pile leg and the pile shoe are welded, two upper trolley 1# lifting hooks and 2# lifting hooks of a 600-ton gantry crane are connected with a first lifting lug at the upper end of the lower pile leg, and after the pile shoe and the lower pile leg are integrally lifted to a specified height, nine high supporting structures are adopted to be laid on the lower plane of the pile shoe;
f. Hoisting and installing the upper pile leg: a 500-ton-loaded 6-meter-long steel wire rope sleeve is adopted, two 500-ton shackles are connected with a straight-shaped reinforcing lifting lug structure at the top end of an upper pile leg, a small hanging row at the lower part of a 3# hook is detached, a 3# hook is used for hooking the middle part of the 500-ton 6-meter steel wire rope sleeve respectively; the steel wire ropes of the 1# lifting hook and the 2# lifting hook are respectively connected with two sets of lower lifting lugs at the lower end of the upper pile leg by shackles, when the upper pile leg rises to 5 meters away from the ground, the 1# lifting hook and the 2# lifting hook stop lifting, the 3# lifting hook continues lifting, the pile leg is enabled to slowly stand upright, the upper pile leg stands on a wood, the shackles on the lower lifting lugs are removed, the 1# lifting hook and the 2# lifting hook are removed, and the lower lifting lug is manually cut off; the 3# lifting hook stably lifts the whole pile leg, the upper pile leg is lifted to the position corresponding to the angle of the lower pile leg, the pile leg is lifted to the position with the height of 1 meter at the top of the lower pile leg, the pile leg is translated to the top of the lower pile leg, and the pile leg is slowly lowered; and (3) position adjustment is performed by constructors, so that all the accuracy of verticality, welding ports, internal pile punching pipelines and the like are ensured to be in a qualified range, and the constructors start to weld the upper pile leg and the lower pile leg.
According to the method for installing the pile leg of the wind power installation platform by the portal crane, the X-shaped reinforcing lifting lug structure comprises two bearing rods which are distributed in an X-shaped manner in a crossing manner, an acute angle clamped by the two bearing rods is smaller than 30 degrees, two ends of each bearing rod are respectively welded with the inner wall of the lower pile leg, two ends of each bearing rod are respectively welded with the first lifting lug, the first lifting lug penetrates through the bearing rod, and the lower part of the first lifting lug is welded with the inner wall of the lower pile leg.
According to the method for installing the wind power installation platform pile leg by the portal crane, the sealing plate is arranged at the top of the upper pile leg, the in-line reinforced lifting lug structure comprises two sets of second lifting lugs, a cross main support, a supporting arm and a lifting lug bottom supporting plate, wherein the cross main support, the supporting arm and the lifting lug bottom supporting plate are arranged at the lower part of the sealing plate, four end points of the cross support are welded with the inner wall of the upper pile leg, two sets of second lifting lug webs are arranged at two ends of one supporting arm of the cross main support, the two sets of second lifting lug webs are coplanar, the middle parts of the supporting arms are respectively welded with the cross main support, the directions of the supporting arms are perpendicular to the webs of the second lifting lugs, the two ends of each supporting arm are respectively welded with the inner wall of the upper pile leg, the lower part of each second lifting lug is respectively welded with the lifting lug bottom supporting plate, and the outer side edge of the lifting lug bottom supporting plate is welded with the inner wall of the upper pile leg; the lug structure is strengthened to I shape still includes lug limit backup pad and lug side support plate that is located shrouding upper portion, lug limit backup pad bottom and shrouding welding, lug limit backup pad middle part and the outside welding of second lug, and each lug limit side fagging bottom and shrouding welding, the side of every two lug limit fagging and the inboard welding of one set of second lug.
In the step d, the center line of the acute angle between the two bearing rods after the lower pile leg is installed is parallel to the length direction of the pile shoe.
According to the method for installing the pile legs of the wind power installation platform by the portal crane, the connecting lines of the two sets of in-line reinforcing lifting lugs are parallel to the length direction of the pile shoe after the upper pile legs are installed in the step f.
In the step c, the center line of an acute angle clamped by two bearing rods of the pile leg positioned at the lower part of the bracket is vertical to the dock bottom; the connecting line of the two sets of second lifting lugs positioned on the upper pile leg of the bracket is parallel to the dock bottom.
According to the method for installing the pile legs of the wind power installation platform by the gantry crane, the pile legs at the lower part and the pile legs at the upper part are equal in length.
The method utilizes general equipment of a general assembly shipyard, namely 600 tons of gantry cranes, to install the spud legs with the height of 82.6 meters, fully utilizes the existing equipment and facilities in the installation process, comprehensively considers the hoisting and transportation capacities of a construction site, and divides the spud legs into two parts for processing and installation. The upper end of the lower pile leg adopts an X-shaped reinforced lifting lug structure, and a hoisting rigging of 2 pulleys and 2 steel wire ropes is adopted, so that the X-shaped reinforced structure at the upper end of the lower pile leg and 4 lifting lugs are uniformly stressed in the whole hoisting process, and the lower pile leg and pile shoe are integrally lifted after being welded; the lifting lug structure is reinforced in a straight shape and is arranged on the upper pile leg, a lifting appliance of a 600-ton gantry crane is flexibly applied, and the lifting appliance is matched with a 500-ton 6-meter steel wire rope ring and a matched shackle to meet the lifting requirements of height and weight, so that the lifting installation of the upper pile leg is realized. Through statistics, the purchasing cost of the manufacturing tool and the sling tool required by the method is about 3 ten thousand yuan, the period of sectionally turning over and installing the single upper pile leg is about 0.5 day, the economic benefit is greatly improved, and the construction period is shortened.
Drawings
FIG. 1 is a position profile of a shoe;
FIG. 2 is a schematic view of a lower leg;
FIG. 3 is a top view of FIG. 2;
FIG. 4 is a perspective view of an X-shaped reinforcing shackle structure;
FIG. 5 is a cross-sectional view of an X-shaped reinforcing shackle structure;
FIG. 6 is a schematic view of an upper leg;
FIG. 7 is a top view of FIG. 6;
FIG. 8 is a schematic view of the distribution of the second lifting lugs on the top of the upper leg;
FIG. 9 is a perspective view of the in-line reinforcement tab structure with the closure plate removed;
FIG. 10 is a schematic view of the leg offloaded in a dock;
FIG. 11 is a schematic illustration of the placement of the lower leg on the bracket;
FIG. 12 is a schematic illustration of the placement of the upper leg on the bracket;
FIG. 13 is a lower leg lifting schematic;
FIG. 14 is a schematic view of the lower leg and shoe installation;
FIG. 15 is a schematic view of the lower leg relative to the shoe orientation;
FIG. 16 is a schematic view of the lower leg installation completed;
FIG. 17 is a schematic view of an upper leg lifting;
FIG. 18 is a schematic view of the upper leg relative to the shoe orientation;
Fig. 19 is a schematic view of the upper leg and lower leg hoisting connection.
The reference numerals in the figures are: 1. the pile shoe, 2, lower pile leg, 3, bearing rod, 4, first lifting lug, 5, lower lifting lug, 6, upper pile leg, 7, second lifting lug, 8, 600 ton gantry crane, 9, small harbor basin, 10, dock, 11, 1# lifting hook, 12, 2# lifting hook, 13, 3# lifting hook, 14, pile fixing chamber, 15, main hull pile leg surrounding well region, 16, wooden wedge, 17, high supporting structure, 18, wire rope sleeve, 19, mountain-shaped hook head, 20, sealing plate, 21, cross main support, 22, supporting arm, 23, lifting lug bottom support plate, 24, lifting lug side support plate, 25, lifting lug side support plate.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
The method of the invention uses a 600 ton gantry crane which is universal in a general assembly shipyard as hoisting equipment, and the pile leg with the total length of 82.6 meters is arranged on the pile shoe with the height of 2.4 meters. The pile leg is assembled and lengthened by two sections, and the diameter of the pile leg is 4 meters. The upper leg and the lower leg are substantially equal in length, each weighing about 320 tons and the shoe weighing about 120 tons. After the upper pile leg is installed in place, the distance between the top surface and the ground of the dock is about 85 meters, and the existing lifting appliance of the 600-ton gantry crane equipped in the dock cannot meet the requirement of the lifting height. Conventionally, after the platform is undocked at a wharf station for piling and ship lifting, a large-scale floating crane is adopted for hoisting the upper pile leg. However, if the traditional scheme is adopted, the integrity of the whole platform after undocking is affected, the cost of renting the large floating crane is high, and the ship-to-ship period and cost control are affected.
The upper trolley of the 600 ton gantry crane is provided with a 1# lifting hook and a 2# lifting hook, the lifting weight SWL2X300t, the lifting height of the pin hook of the upper trolley is about 88.5m to land, the maximum lifting weight difference of the two lifting hooks is 150t, and the transverse moving distance of the two lifting hooks is 13m to 17m; the lower trolley of the 600 ton gantry crane is provided with a 3# lifting hook, a main lifting weight SWL400t and an auxiliary lifting weight SWL20t, and the lifting height of the pin hook of the lower trolley is about 80.5m to land.
Referring to FIG. 1, the position distribution of pile shoes in the main hull of the wind power installation platform is shown, each pile shoe 1 defines an installation angle of 0 degree, 90 degrees, 180 degrees and 270 degrees relative to the installation direction of the main hull, and the length direction of the pile shoe is 0-180 degrees.
The method is implemented according to the following steps:
a. Pile leg manufacturing: because the upper pile leg and the lower pile leg adopt different hoisting methods, lifting lug structures with different structures are required to be manufactured on the upper pile leg and the lower pile leg which are processed. Referring to fig. 2-5, two sets of lower lifting lugs 5 are symmetrically arranged at the lower part of the lower pile leg 2 respectively, and the arc length distance between the two sets of lower lifting lugs is 1-1.3 meters. And manufacturing an X-shaped reinforced lifting lug structure at the top end of the upper pile leg. The X-shaped reinforced lifting lug structure comprises two bearing rods 3 which are distributed in an X-shaped manner in a crossing manner, an acute angle clamped by the two bearing rods is smaller than 30 degrees, two ends of each bearing rod are respectively welded with the inner wall of the lower pile leg, two ends of each bearing rod are respectively welded with a first lifting lug 4, and webs of the first lifting lugs at two ends of the same bearing rod are coplanar. The first lifting lug penetrates through the bearing rod, the lower portion of the first lifting lug is triangular, and the straight edge of the triangle is welded with the inner wall of the lower pile leg. The two sets of lower lifting lugs 5 are symmetrically distributed on two sides of a bus of the lower pile leg, and the bus corresponds to the center line of an acute angle clamped by the two bearing rods. The design that the acute angle clamped by two bearing rods is smaller than 30 degrees firstly avoids the pile leg pin hole protection cover, and secondly is favorable for the steel wire rope to be vertical to the pulley in the hoisting process. In consideration of the fact that the lower pile leg and the pile shoe need to be lifted together after being welded, the four sets of first lifting lugs are arranged by adopting the bearing rod reinforcing structure, and therefore bearing levels of a single set of steel wire ropes and the first lifting lugs are reduced.
Referring to fig. 6-9, two sets of lower lifting lugs 5 are symmetrically arranged at the lower part of the upper pile leg respectively, and the arc length distance between the two sets of lower lifting lugs is 1-1.3 meters. The upper end of upper portion spud leg is equipped with shrouding 20, has still set up the I-shaped and has strengthened lug structure. When the upper pile leg is hoisted, based on the consideration of the hoisting height of the 600-ton gantry crane, the two lifting lugs bear large weight respectively in a mode of combining the steel wire rope sleeve and the two lifting lugs, so that the in-line reinforced lifting lug structure is specially designed. The straight-line-shaped reinforced lifting lug structure comprises two sets of second lifting lugs 7, a cross main support 21, a support arm 22 and a lifting lug bottom support plate 23, wherein the cross main support 21, the support arm 22 and the lifting lug bottom support plate 23 are arranged at the lower part of the sealing plate. The four endpoints of the cross main support are respectively welded with the inner wall of the upper pile leg, and the two sets of second lifting lugs are positioned at the two ends of one supporting arm of the cross main support, and the webs of the two sets of second lifting lugs are coplanar. The middle parts of the plurality of support arms are respectively welded with the cross main support, the directions of the plurality of support arms are perpendicular to the plate surface of the web plate of the second lifting lug, and the two ends of each support arm are respectively welded with the inner wall of the upper pile leg. The cross main support and the support arms serve as main support structures for the second lifting lugs, so that on one hand, the weight of the upper pile leg after being lifted is born, and on the other hand, the dynamic lifting bearing of the upper pile leg in the process of horizontally placing the upper pile leg to a vertical state is born. The lower part of each second lifting lug is welded with a lifting lug bottom supporting plate 23, and the outer side edge of the lifting lug bottom supporting plate is welded with the inner wall of the upper pile leg. The in-line reinforcing lifting lug structure further comprises two lifting lug side support plates 24 and four lifting lug side support plates 25 which are positioned at the upper part of the sealing plate. The bottom of each lifting lug side support plate is welded with the side part of the upper pile leg, the middle part of each lifting lug side support plate is welded with the outer side part of the second lifting lug respectively, and the outer side of the second lifting lug close to the side part of the upper pile leg is supported. The bottoms of the side support plates of the lifting lugs are welded with the sealing plates, the side edges of the side support plates of the lifting lugs which are symmetrically arranged are welded with the inner side parts of the second lifting lugs, which are close to the center positions of the upper pile legs, are supported, and the positions of the side support plates of the lifting lugs correspond to the supporting arms up and down. The two sets of lower lifting lugs are symmetrically distributed on two sides of a bus of the upper pile leg, and the bus corresponds to the central lines of the two sets of second lifting lugs.
B. and (3) pile leg transportation: and transporting the lower spud leg and the upper spud leg into a small harbor pool of a final assembly shipyard by adopting a large transport ship.
C. Pile leg ship unloading: the lower pile leg 2 and the upper pile leg 6 are dismounted by a large transport ship entering the small harbor pool 9 by using the upper and lower trolleys of the 600 ton gantry crane 8 and are placed on the bracket positioned on the bottom surface of the dock 10, and the placing direction of the pile legs is parallel to the main beam of the gantry crane, as shown in fig. 10. The center line of the acute angle formed by the two bearing rods 3 of the lower pile leg of the bracket is vertical to the dock bottom, as shown in fig. 11. By adopting the placement state, the whole turning and erecting process of the lower pile leg is mainly considered, the web plate of the first lifting lug 4 and the steel wire rope are positioned close to a plumb position, namely, when the lower pile leg is lifted horizontally, the four sets of first lifting lugs 4 bear the weight of the pile leg with the downward gravity, and after the turning and erecting process, the four sets of first lifting lugs 4 bear the weight of the whole pile leg. The connecting line of the two sets of second lifting lugs 7 positioned on the upper pile leg of the bracket is parallel to the dock bottom, namely, the two sets of second lifting lugs are in a horizontal state, as shown in fig. 12, by adopting the placement state, when the upper pile leg is lifted horizontally, the two sets of second lifting lugs 7 bear the weight of 1/2 pile leg downwards by gravity, after the upper pile leg is turned over and erected, the two sets of second lifting lugs 7 bear the weight of the whole pile leg, in addition, because of the lifting hook height limit of the lower trolley 3# lifting hook 13 of the 600-ton gantry crane, the 3# lifting hook is hooked in the middle of the steel wire rope sleeve 18, and the lifting appliance height of nearly half of the steel wire rope sleeve can be shortened.
D. hoisting and installing the lower pile leg:
(1) Referring to fig. 13, the steel wire ropes on the 3# lifting hook 13 of the 600 ton gantry crane are respectively connected with two groups of first lifting lugs 4 at the upper end of the lower pile leg by shackle, and the steel wire ropes of the 1# lifting hook 11 and the 2# lifting hook 12 of the 600 ton gantry crane are respectively connected with the lower lifting lug 5 of the lower pile leg by shackle. When the 3# lifting hook of the 600 ton portal crane is connected with the first lifting lug at the upper end of the lower pile leg, two pulleys and two steel wire ropes are needed, and a method of two pulleys and 2 steel wire ropes is adopted, so that the X-shaped reinforced lifting lug structure at the upper end of the lower pile leg and each first lifting lug are uniformly stressed in the whole lifting process, and the risk that a single lifting lug is insufficient in strength due to uneven stress is avoided. And when the distance between the whole pile leg lifted by the 600-ton gantry crane upper and lower trolleys and the bracket is about 100mm, a brake test is performed. After stopping for 5-10 minutes, the stress is balanced, the hoisting is stable, and the hoisting is carried out after the positions of the steel wire rope and the shackle are checked to be abnormal. The angle between the steel wires cannot be larger than 60 degrees.
(2) When the lower leg is lifted up to about 40 meters from the ground, the 1# hooks and the 2# hooks slowly descend, so that the lower leg slowly stands up. The on-site operator removes the shackle on the lower lifting lug, the lifting hooks 1# and 2# of the 600-ton gantry crane are removed, and manpower or traction force is adopted (the lower pile leg is driven to rotate for 90 degrees in a segmented mode and then moves to a placement position, slowly descends, and falls to the ground again.
(3) And arranging the battens in advance at the upright position of the pile leg, ensuring that the lower pile leg is erected above the battens, preventing the structure below the pile leg from being damaged, and stably arranging the pile leg above the battens. The worker begins to cut off the lower shackle and polishes the fairing.
(4) Referring to fig. 14, a 600 ton gantry crane 3# lifting hook 13 is lifted, a lower pile leg 2 is lifted to an installation position, the installation angle is adjusted, the 3# lifting hook slowly descends simultaneously, passes through a pile fixing chamber 14 and a main hull pile leg surrounding area 15 and falls into an installation hole of a pile shoe 1, and when the lower end of the pile leg is completely aligned with the pile shoe, an operator starts fine adjustment and alignment. According to the gap between the inner wall of the pile fixing chamber and the pile leg, the upper part and the lower part bevel connection positions of the pile fixing chamber are sealed by adopting the wooden wedges 16, so that the pile leg is in a sealing state before welding. And (5) after checking and confirming, the quality personnel weld the lower pile leg and the pile shoe. The lower leg is oriented with respect to the shoe as shown in fig. 15, i.e. the centre line of the acute angle between the two load-bearing bars 3 of the lower leg is parallel to the long direction of the shoe. In this state, the lower part of the pile shoe is supported by the low support structure.
E. Lifting the pile shoe: referring to fig. 16, after the welding of the lower pile leg and the pile shoe is completed, two lifting hooks 1# and 2# of the upper trolley of the 600-ton gantry crane are connected with a first lifting lug at the upper end of the lower pile leg, after the pile shoe and the lower pile leg are integrally lifted to a designated height, nine high supporting structures 17 are laid on the lower plane of the pile shoe, and the high supporting structures are 1.8 m high steel structure supports, so that the bottom plane of the pile shoe and the bottom plane of the main hull are at the same height, and the safety of floating and undocking after the construction in the platform dock is completed is ensured.
F. hoisting and installing the upper pile leg:
(1) Referring to fig. 17, based on the ultra-high size of the spud leg, in order to reduce the height of the lifting appliance as much as possible, to meet the requirement of lifting the upper spud leg, a 500-ton-load 6-meter-long wire rope sleeve 18 is adopted when lifting the upper spud leg, two 500-ton shackles are connected with two second lifting lugs 7 at the top end of the upper spud leg, a small lifting row at the lower part of a lower trolley 3# hook 13 of a 600-ton gantry crane is removed, and mountain-shaped hook heads 19 are used for respectively hooking the middle parts of the 500-ton 6-meter wire rope sleeves. The steel wire ropes of the 1# lifting hook 11 and the 2# lifting hook 12 are respectively connected with two groups of lower lifting lugs at the lower ends of the pile legs by shackles. And when the distance between the whole pile leg lifted by the 600-ton gantry crane upper and lower trolleys and the bracket is about 100mm, a brake test is performed. After stopping for 5-10 minutes, the stress is balanced, the hoisting is stable, and the hoisting is carried out after the positions of the steel wire rope and the shackle are checked to be abnormal. The angle between the steel wires cannot be larger than 60 degrees.
(2) When the upper pile leg rises to about 5 meters from the ground, the lifting of the 1# lifting hook and the 2# lifting hook is stopped, and the 3# lifting hook continues to lift, so that the pile leg is slowly erected. And arranging the battens in advance at the upright position of the pile legs, ensuring that the pile legs are erected above the battens, preventing the structures below the pile legs from being damaged, and stably arranging the pile legs above the battens. The on-site staff removes the shackle on the lower lifting lug, and the lifting hooks 1# and 2# of the 600 ton gantry crane are removed, and the worker starts to cut off the lower lifting lug and polishes and smooths.
(3) Referring to fig. 19, the whole upper pile leg 6 is stably lifted by adopting a 3# lifting hook 13 of the 600-ton gantry crane 8, lifted to a position with the height of 1 meter at the top of the lower pile leg, and translated to the top of the pile leg. The upper leg is shown in figure 18 in the relative position to the shoe, i.e. the connecting line between the two sets of second lifting lugs 7 of the upper leg is parallel to the longitudinal direction of the shoe, and slowly descends after the substantial alignment is confirmed. And 3, fine adjustment is performed by constructors, so that all the accuracy of verticality, welding ports, internal pile punching pipelines and the like are ensured to be in a qualified range, quality staff detects, and after the constructors are ensured to be error-free, the constructors start to weld the upper pile leg and the lower pile leg. Thus, the installation of one pile leg is completed.
And (5) hoisting and installing all the pile legs sequentially according to the steps, and finally, installing all the ultra-high pile legs.
Claims (7)
1. The method for installing the pile leg of the wind power installation platform by using the gantry crane is characterized by taking a 600 ton gantry as hoisting equipment, and sequentially hoisting and installing the pile leg with the total length of 82.6 meters into a lower pile leg and an upper pile leg, wherein the method comprises the following steps:
a. Pile leg manufacturing: the lower pile leg and the upper pile leg manufactured in a segmentation way are transported into a small harbor pool of a final assembly shipyard through a large transport ship, two sets of lower lifting lugs are symmetrically arranged at the lower parts of the upper pile leg and the lower pile leg respectively, an X-shaped reinforcing lifting lug structure is arranged at the upper end of the lower pile leg, and an I-shaped reinforcing lifting lug structure is arranged at the upper end of the upper pile leg;
b. And (3) pile leg transportation: transporting the lower spud leg and the upper spud leg into a small harbor pool of a final assembly shipyard by adopting a large transport ship;
c. Pile leg ship unloading: the lower pile leg and the upper pile leg are dismounted by using a 600 ton gantry crane and placed on a bracket in a dock, and the long direction of the pile leg is parallel to a main beam of the gantry crane;
d. Hoisting and installing the lower pile leg: the steel wire ropes on the 3# lifting hooks of the 600 ton gantry crane are connected with shackles of the X-shaped reinforced lifting lug structures of the lower pile legs, the steel wire ropes of the 1# lifting hooks and the 2# lifting hooks are respectively connected with shackles of two sets of lower lifting lugs of the lower pile legs, the 1# lifting hooks and the 2# lifting hooks slowly descend after the lower pile legs are lifted to be more than 40 meters away from the ground, the lower pile legs slowly stand upright, the lower pile legs stand on a square, shackles on the lower lifting lugs are removed, the 1# lifting hooks and the 2# lifting hooks are removed, and the lower lifting lugs are manually cut off; lifting a 3# lifting hook, lifting a lower pile leg to a pile shoe position, enabling the length direction of the pile shoe to be perpendicular to a gantry crane girder, and after the lower end of the lower pile leg is completely aligned with the pile shoe, enabling constructors to start fine adjustment and alignment, sealing and fixing the upper part and the lower bevel positions of a pile fixing chamber by using a wooden wedge, ensuring that the pile leg is in a sealing state before welding, confirming that the lower end of the lower pile leg is completely aligned with the pile shoe, and welding the lower pile leg and the pile shoe;
e. lifting the pile shoe: after the lower pile leg and the pile shoe are welded, two upper trolley 1# lifting hooks and 2# lifting hooks of a 600-ton gantry crane are connected with a first lifting lug at the upper end of the lower pile leg, and after the pile shoe and the lower pile leg are integrally lifted to a specified height, nine high supporting structures are adopted to be laid on the lower plane of the pile shoe;
f. Hoisting and installing the upper pile leg: a 500-ton-loaded 6-meter-long steel wire rope sleeve is adopted, two 500-ton shackles are connected with a straight-shaped reinforcing lifting lug structure at the top end of an upper pile leg, a small hanging row at the lower part of a 3# hook is detached, a 3# hook is used for hooking the middle part of the 500-ton 6-meter steel wire rope sleeve respectively; the steel wire ropes of the 1# lifting hook and the 2# lifting hook are respectively connected with two sets of lower lifting lugs at the lower end of the upper pile leg by shackles, when the upper pile leg rises to 5 meters away from the ground, the 1# lifting hook and the 2# lifting hook stop lifting, the 3# lifting hook continues lifting, the pile leg is enabled to slowly stand upright, the upper pile leg stands on a wood, the shackles on the lower lifting lugs are removed, the 1# lifting hook and the 2# lifting hook are removed, and the lower lifting lug is manually cut off; the 3# lifting hook stably lifts the whole pile leg, the upper pile leg is lifted to the position corresponding to the angle of the lower pile leg, the pile leg is lifted to the position with the height of 1 meter at the top of the lower pile leg, the pile leg is translated to the top of the lower pile leg, and the pile leg is slowly lowered; and (3) position adjustment is carried out by constructors, so that the perpendicularity, the welding ports and all the precision of the internal pile punching pipelines are ensured to be in a qualified range, and the constructors start to weld the upper pile leg and the lower pile leg.
2. The method for installing the pile leg of the wind power installation platform by the gantry crane in a bearing manner, according to claim 1, is characterized in that: the X-shaped reinforced lifting lug structure comprises two bearing rods which are distributed in an X-shaped manner in a crossing manner, an acute angle clamped by the two bearing rods is smaller than 30 degrees, two ends of each bearing rod are respectively welded with the inner wall of the lower pile leg, two ends of each bearing rod are respectively welded with a first lifting lug, the first lifting lug penetrates through the bearing rods, and the lower part of the first lifting lug is welded with the inner wall of the lower pile leg.
3. The method for installing the pile leg of the wind power installation platform by the gantry crane carrier according to claim 1, which is characterized in that: the top of the upper pile leg is provided with a sealing plate, the in-line reinforced lifting lug structure comprises two sets of second lifting lugs, a cross main support, supporting arms and lifting lug bottom supporting plates, wherein the cross main support, the supporting arms and the lifting lug bottom supporting plates are arranged at the lower part of the sealing plate; the lug structure is strengthened to I shape still includes lug limit backup pad and lug side support plate that is located shrouding upper portion, lug limit backup pad bottom and shrouding welding, lug limit backup pad middle part and the outside welding of second lug, and each lug limit side fagging bottom and shrouding welding, the side of every two lug limit fagging and the inboard welding of one set of second lug.
4. A method of installing a wind power installation platform spud leg by a gantry crane according to claim 2 or 3, characterized in that: in the step d, the center line of the acute angle between the two bearing rods after the lower pile leg is installed is parallel to the length direction of the pile shoe.
5. The method for installing the pile leg of the wind power installation platform by the gantry crane in a bearing manner, according to claim 4, is characterized in that: and f, connecting lines of the two sets of in-line reinforcing lifting lugs after the upper pile leg is installed in the step are parallel to the length direction of the pile shoe.
6. The method for installing the pile leg of the wind power installation platform by the gantry crane in a hanging manner, according to claim 5, is characterized in that: in the step c, the center line of the acute angle clamped by the two bearing rods of the pile leg positioned at the lower part of the bracket is vertical to the dock bottom; the connecting line of the two sets of second lifting lugs positioned on the upper pile leg of the bracket is parallel to the dock bottom.
7. The method for installing the pile leg of the wind power installation platform by the gantry crane in a bearing manner, according to claim 6, is characterized in that: the lower leg and the upper leg are equal in length.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210369650.8A CN114808897B (en) | 2022-04-08 | Method for installing pile legs of wind power installation platform by gantry crane bearing crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210369650.8A CN114808897B (en) | 2022-04-08 | Method for installing pile legs of wind power installation platform by gantry crane bearing crane |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114808897A CN114808897A (en) | 2022-07-29 |
| CN114808897B true CN114808897B (en) | 2024-05-31 |
Family
ID=
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104805814A (en) * | 2014-05-13 | 2015-07-29 | 烟台中集来福士海洋工程有限公司 | Self-elevating platform pile leg mounting method |
| CN104878733A (en) * | 2015-04-21 | 2015-09-02 | 南通蓝岛海洋工程有限公司 | Drilling platform pile leg segmented closing technology |
| CN105692449A (en) * | 2016-03-22 | 2016-06-22 | 中交第二航务工程勘察设计院有限公司 | Method for spud leg lengthening and folding of self-elevating drilling platform |
| CN106351197A (en) * | 2015-07-13 | 2017-01-25 | 烟台中集来福士海洋工程有限公司 | Pile leg folding method of hydraulic bolt type self-lifting platform |
| CN114059530A (en) * | 2021-12-17 | 2022-02-18 | 山海关船舶重工有限责任公司 | Method for disassembling pile shoe of self-elevating wind power installation platform |
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104805814A (en) * | 2014-05-13 | 2015-07-29 | 烟台中集来福士海洋工程有限公司 | Self-elevating platform pile leg mounting method |
| CN104878733A (en) * | 2015-04-21 | 2015-09-02 | 南通蓝岛海洋工程有限公司 | Drilling platform pile leg segmented closing technology |
| CN106351197A (en) * | 2015-07-13 | 2017-01-25 | 烟台中集来福士海洋工程有限公司 | Pile leg folding method of hydraulic bolt type self-lifting platform |
| CN105692449A (en) * | 2016-03-22 | 2016-06-22 | 中交第二航务工程勘察设计院有限公司 | Method for spud leg lengthening and folding of self-elevating drilling platform |
| CN114059530A (en) * | 2021-12-17 | 2022-02-18 | 山海关船舶重工有限责任公司 | Method for disassembling pile shoe of self-elevating wind power installation platform |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100537348C (en) | Offshore platform integral constructing and hoisting method and special-purpose hoisting machine for the same | |
| EP1021624B1 (en) | Method and apparatus for the offshore installation of multi-ton packages such as deck packages and jackets | |
| CN100522793C (en) | Installing method of portal crane | |
| CN108455451B (en) | A kind of 600 tons of gantry cranes hold the method for hanging installation superelevation flare tower | |
| CN108678388B (en) | Short mast multi-point integral lifting construction method for large-capacity circular storage tank | |
| CN111039194A (en) | Super-large crane final assembly process | |
| CN102936899A (en) | Method for installing steel cofferdam by the aid of pier supporting frame | |
| CN103967284A (en) | Method for installing steel column in butt joint with reserved column head | |
| CN105523477A (en) | Method for carrying out pile leg connection by utilizing 3000t floating crane | |
| CN114808897B (en) | Method for installing pile legs of wind power installation platform by gantry crane bearing crane | |
| CN103171976A (en) | Hoisting method for shipyard gantry crane | |
| CN109537466B (en) | Positioning method for suspending steel structure beam in air | |
| CN206986872U (en) | A kind of monoblock type job platform for offshore wind farm construction | |
| CN114592438B (en) | Construction method of space main cable suspension bridge | |
| CN107487724B (en) | Non-crane-assisted large floating crane arm support mounting device and mounting method | |
| CN114808897A (en) | Method for installing pile leg of wind power installation platform by using gantry crane bearing crane | |
| CN110593111B (en) | Method for installing beam section of cable tower area | |
| CN111894341A (en) | Centering method for back-twist tower crane | |
| KR100465882B1 (en) | On-ground Deck Mating Method of Rig Structure by Jack System | |
| CN219098539U (en) | Hoisting device for large ship lift platform | |
| CN114132830B (en) | Pile leg section deflection lifting construction method | |
| CN110255359B (en) | Lifting appliance for lifting segmental steel beams | |
| CN210162437U (en) | Special-shaped steel pipe arch section bearing device | |
| CN216194717U (en) | Single barge type pile planting system | |
| CN216474531U (en) | Water steel box girder lifting, sliding and installing system with existing bridge penetrating downwards |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant |