CN114132830A - Pile leg section displacement lifting construction method - Google Patents
Pile leg section displacement lifting construction method Download PDFInfo
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- CN114132830A CN114132830A CN202111516713.XA CN202111516713A CN114132830A CN 114132830 A CN114132830 A CN 114132830A CN 202111516713 A CN202111516713 A CN 202111516713A CN 114132830 A CN114132830 A CN 114132830A
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- pile leg
- hoisting
- leg section
- lifting
- pile
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C1/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles
- B66C1/10—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means
- B66C1/12—Slings comprising chains, wires, ropes, or bands; Nets
- B66C1/14—Slings with hooks
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C13/00—Other constructional features or details
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C13/00—Other constructional features or details
- B66C13/04—Auxiliary devices for controlling movements of suspended loads, or preventing cable slack
- B66C13/08—Auxiliary devices for controlling movements of suspended loads, or preventing cable slack for depositing loads in desired attitudes or positions
Abstract
The invention discloses a pile leg section deflection lifting construction method, and relates to the technical field of pile leg construction of ocean platforms. The method specifically comprises the following steps: pile leg segmentation: determining the position of a pile leg section closure opening according to the capacity of hoisting equipment, the structural strength of a pile leg and a hoisting process; constructing pile legs in sections; pile leg section displacement lifting and hoisting preparation; and (3) hoisting the pile leg section, inserting a hoisting tool into the hole at one end of the pile leg section, hoisting one end of the pile leg section through the matching of the hoisting beam and the hoisting tool, landing a single point at the other end of the pile leg section, and turning the pile leg section from a horizontal state to a vertical state. The invention has the advantages that: the pile leg section is lifted by the horizontal state and overturns to the vertical state, and the deflection of the pile leg section is lifted to pass through the opening and is matched with the hanging beam through the hanging rod, so that the pile leg section is lifted by the gantry crane, the assembly and disassembly work of a plurality of lifting lugs is avoided, the construction process is simple, the project construction period is shortened, the construction quality is guaranteed, and the construction cost is saved.
Description
Technical Field
The invention relates to the technical field of construction of pile legs of ocean platforms, in particular to a pile leg section displacement lifting construction method.
Background
The pile inserting type emergency rescue salvage engineering ship can serve offshore shallow water areas of the country for emergency obstacle removal and emergency rescue salvage operation, has emergency rescue salvage operation support functions of lifting, transporting, storing, supplying and the like, has the maximum operation water depth of 55 meters, and can sail in an unlimited navigation area. The ship design gives consideration to the operation economy, can finish the work of equipment lifting, small-sized sunken ship integral salvage, large-sized sunken ship auxiliary salvage, the discharge of sunken ship goods, particularly dangerous goods, the discharge of oil stored in a cabin, the life support of field operation personnel and the like on a salvage operation site, can also be used for the transportation and the lifting of a fan base, a support tower, a cabin and blades of an offshore wind farm, and gives consideration to the work of submarine pipeline maintenance, platform life support, the lifting of various structures on the near shore and the like.
In order to adapt to the work in various complex environments, 4 cylindrical spud legs are arranged on the ship shape and used for lifting the main ship body and providing a stable operation environment for the operation of the offshore platform, and the length of each spud leg is 90 meters, the diameter of each spud leg is 4.8 meters, and E690 steel plates with the thickness of 88mm are used for rolling, splicing and forming.
The pile leg construction is limited by the field, and ships of the same type at home and abroad are built in a dock and a wharf in a segmented manner. The conventional construction process is to weld lifting lugs on the pile leg sections to perform turning and hoisting operations. However, if the welding type lifting lugs are adopted for turning over and hoisting of the pile leg steel cylinder wall material E690, a series of processes of preheating, welding monitoring and heat preservation after welding are strictly performed according to WPS, the construction process is complicated, the difficulty coefficient of construction quality guarantee is large, a large amount of manpower and time cost are consumed to process the assembly and disassembly work of the lifting lugs, and the risk that welding cracks are generated at the welding positions of the parent metal and the lifting lugs is faced. In order to improve the product quality and shorten the construction period, a set of pile leg section lifting construction method suitable for the product needs to be involved and researched.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a pile leg section deflection lifting construction method, which can solve the problems that in the prior art, the turning and lifting of the pile leg section adopt a welding form, the lifting lug construction process is complex, the difficulty coefficient of construction quality guarantee is large, a large amount of manpower and time cost are consumed to process the assembly and disassembly work of the lifting lug, and the risk of welding cracks at the welding position of a base metal and the lifting lug is faced.
In order to solve the technical problems, the technical scheme of the invention is as follows: the method comprises the following steps:
s1, pile leg segmentation: determining the position of a pile leg section closure opening according to the capacity of hoisting equipment, the structural strength of a pile leg and a hoisting process:
s1.1, selecting the length of sectional division of the pile leg: analyzing the field hoisting capacity, determining the length of the corresponding weight pile leg section, segmenting the pile leg, and determining the position of a closure opening of the segmented pile leg section;
s1.2, calculating the strength of the pile leg, analyzing the strength and the rigidity of the pile leg section according to the length of the pile leg section and a primary hoisting process, and keeping the strength and the rigidity within a stress allowable range;
s1.3, determining the number of sections of the segmented spud legs, limiting according to the lifting height of a gantry crane, hoisting the spud leg sections which cannot be hoisted after undocking, and installing the spud leg sections meeting hoisting conditions in a dock stage;
s2, pile leg subsection construction:
s2.1, completing construction of a pile leg segmented structure according to the division of the pile leg segments and a pile leg construction process;
s2.2, hole opening and outfitting installation of the pile leg sections are completed;
s2.3, finishing the sectional coating of the pile leg;
s3, pile leg section displacement lifting and hoisting preparation:
s3.1, analyzing the structural strength of the pile leg section, formulating a hoisting process that a hoisting tool is arranged in a hole at one end of the pile leg section in a penetrating mode, hoisting one end of the pile leg section through the matching of a hoisting beam and the hoisting tool, landing a single point at the other end of the pile leg section, turning over the pile leg section from a horizontal state to a vertical state, manufacturing the hoisting tool according to the hoisting process, wherein the hoisting tool is a hoisting bar and the hoisting bar is recycled;
s3.2, designing the hoisting weight of the hoisting beam according to the weight of the pile leg section, and carrying out a hoisting test on the hoisting beam before hoisting application;
s3.3, preparing and arranging a heavy block on the site before hoisting, and installing a sling: laying a steel plate on a hoisting site to reduce the influence of turning over operation on a foundation, arranging a left stop block and a right stop block on the steel plate to limit the left and right directions of a pile leg section, arranging a front cushion block and a rear stop block on the steel plate, wherein the front cushion block is used for supporting the bottom end of the pile leg section in the hoisting process of the pile leg section, the rear stop block is used for tightly supporting the inclined pile leg section in the hoisting process of the pile leg section, and the front stop block and the rear stop block are respectively arranged in the directions of two ends of the pile leg section;
s3.4, arranging sleepers on the steel plates, horizontally hoisting the pile leg sections to the position above the steel plates, horizontally placing the pile leg sections on the arranged sleepers, laying the lower openings of the pile leg sections through sleepers, and removing lifting hooks after the pile leg sections are laid stably;
s4, pile leg section hoisting implementation:
s4.1, installing a lifting lever in an opening at one end of the pile leg section, connecting a lifting lug at the top of the lifting beam with a main hook of a gantry crane through a lifting hook and a steel wire lifting rope, and connecting the lifting lug at the bottom of the lifting beam with two ends of the lifting lever through the lifting hook and the steel wire lifting rope;
s4.2, slowly hoisting one end of the pile leg section by the aid of the gantry crane through matching of the hoisting beam and the hoisting bar, hoisting the upper end of the pile leg section, pressing a sleeper by a lower opening of the pile leg section, landing a single point at the bottom end of the pile leg section, and slowly turning over the pile leg section from a horizontal state to an inclined state;
and S4.3, when the pile leg section is turned over to the state that the angle between the pile leg section and the horizontal plane is 77 degrees, stopping the lifting of the gantry crane, stabilizing the lifting hook, transferring a bottom supporting point of the pile leg section to a front cushion block, shifting and lifting the pile leg section to the front cushion block to bear force, abutting the pile leg section with a rear stop block, preparing a toggle plate for welding and stopping, continuing lifting until all the parts are finished, continuing the lifting motion of the lifting hook of the gantry crane, finishing the lifting shifting of the pile leg section until the pile leg section is upright, and sequentially performing turnover operation and lifting and folding operation on the pile leg section meeting the lifting condition.
Further, in the step S3.2, the hoisting beam is subjected to a 1.5-time hoisting test before hoisting application, MT detection is performed on all welding seams of the hoisting beam after the test hoisting is finished, and two hoisting beams are manufactured.
Furthermore, in the step S3.3, the steel plate laid on the hoisting site is 25 mm.
Further, in step S3.1, the hanging bar structure is: including the hanger body, the both ends of hanger body are equipped with the baffle that two intervals set up respectively, and the space between two baffles is used for the cover to establish the steel wire lifting rope.
Further, in step S3.2, the suspension beam structure is: the lifting device comprises a lifting beam body, lifting lugs are arranged on two sides of the top of the lifting beam body respectively, and lifting lugs are arranged on two sides of the bottom of the lifting beam body respectively.
The invention has the advantages that: the pile leg is firstly segmented, then the pile leg sections are lifted and turned to be in a vertical state respectively in a horizontal state, the segmented butt joint work of the pile leg is carried out, the deflection of the pile leg sections is lifted to pass through the opening through the lifting lever and is matched with the lifting beam, the lifting operation of the gantry crane is realized, lifting lugs do not need to be welded on the pile leg sections, the assembly and disassembly work of a plurality of lifting lugs is avoided, the construction process is simple, the project construction period is shortened, the risk that welding cracks are generated on the pile leg sections and the welding positions of the lifting lugs is avoided, the construction quality is guaranteed, and the construction cost is saved.
Drawings
Fig. 1 is a schematic view of a leg structure segment of the present invention;
FIG. 2 is a schematic illustration of the field preparation and placement of the leg sections of the pile of the present invention prior to hoisting;
fig. 3 is a schematic view of the leg segment of the present invention laid flat;
fig. 4 is a schematic view of the leg segment of the present invention during upending;
fig. 5 is a schematic view of the pile leg segment of the present invention after completion of deflection and lifting;
FIG. 6 is a schematic structural view of a hoisting tool lifting bar of the present invention;
fig. 7 is a schematic structural view of the suspension beam of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings and the detailed description. The following examples are presented to enable one of ordinary skill in the art to more fully understand the present invention and are not intended to limit the scope of the embodiments described herein.
Taking 1200T pile inserting type rescue salvage engineering ship as an example, the pile leg structure is a cylindrical steel leg surrounding wall structure, the diameter of the pile leg is 4.8 meters, the length of the pile leg is 90 meters, the construction precision of the pile leg requires that the straightness of the pile leg is 5 mm/any 20m, the ovality is less than 6mm, the diameter deviation of the opening of the bolt is +/-1 mm, the position deviation of the opening of the bolt is +/-1 mm, and the angle deviation of the opening of the bolt is 90 +/-0.05 degrees. The pile leg of the embodiment has large size and high material welding requirement, and is constructed by the following pile leg section hoisting process in order to shorten the construction period and save the cost.
The construction method comprises the following steps:
s1, pile leg segmentation: determining the position of a pile leg section closure opening according to the capacity of hoisting equipment, the structural strength of a pile leg and a hoisting process:
s1.1, selecting the length of sectional division of the pile leg: analyzing the field hoisting capacity, wherein the maximum hoisting capacity of a single hook of the conventional gantry crane is 300 tons, the length of the pile leg section corresponding to the weight is 24 meters, the pile leg is segmented, and the position of a folding opening of the segmented pile leg section is determined;
s1.2, calculating the strength of the pile leg, analyzing the strength and the rigidity of the pile leg section according to the length of the pile leg section and a primary hoisting process, and keeping the strength and the rigidity within a stress allowable range;
s1.3, determining that the spud leg sections are divided into three sections of 23 meters/24 meters/39 meters for construction, and the other sections are 4 meters as base sections, as shown in figure 1, according to the lifting height limitation of a gantry crane, the spud leg section of the last section of 39 meters cannot be lifted due to the lifting height limitation of the gantry crane, lifting is carried out after undocking, and the other two sections of spud leg sections of 23 meters/24 meters meet the lifting condition, and are installed in a dock stage.
S2, pile leg subsection construction:
s2.1, according to the division of the pile leg sections and the pile leg construction process, completing construction of a pile leg section structure, wherein the weight of the pile leg section structure is 240 tons/250 tons/400 tons respectively;
s2.2, completing the hole opening and outfitting installation of the pile leg segments, wherein the weight of the pile leg segments after installation is 250 tons/420 tons respectively,
and S2.3, finishing the sectional coating of the pile leg.
S3, pile leg section displacement lifting and hoisting preparation:
s3.1, analyzing the structural strength of the pile leg section, formulating a hoisting process that a hoisting tool is arranged in a hole at one end of the pile leg section in a penetrating mode, hoisting one end of the pile leg section through the matching of a hoisting beam and the hoisting tool, landing a single point at the other end of the pile leg section, turning over the pile leg section from a horizontal state to a vertical state, and manufacturing the hoisting tool according to the hoisting process, wherein the hoisting tool is a hoisting bar.
Make one set of frock davit according to hoisting process, davit reuse accomplishes the hoist and mount of 8 spud leg sections of 4 spud legs in the dock stage in proper order, as shown in fig. 6, the davit structure is: including the lifting bar body 50, the both ends of lifting bar body 50 are equipped with the baffle 51 that two intervals set up respectively, and the space between two baffles 51 is used for the cover to establish the steel wire lifting rope, as shown in fig. 7, and the hanging beam structure is: the lifting beam comprises a lifting beam body 60, lifting lugs are respectively arranged on two sides of the top of the lifting beam body 60, and lifting lugs are respectively arranged on two sides of the bottom of the lifting beam body 60.
S3.2, designing the hoisting weight of the hoisting beam to be 300 tons according to the weight of the pile leg section, carrying out 1.5 times of hoisting test on the hoisting beam before hoisting application, carrying out MT detection on all welding lines of the hoisting beam after the test hoisting is finished, and manufacturing two hoisting beams, wherein the weight of a single hoisting beam is about 2 tons.
S3.3, preparing and arranging a heavy block on the site before hoisting, and installing a sling: lay 25 mm's steel sheet at the hoist and mount place to reduce the influence of standing up the operation to the ground, dog 10 carries on spacingly to the left and right directions of spud leg section about setting up on the steel sheet, set up preceding cushion 20 and backstop 30 on the steel sheet, preceding cushion 20 is used for the spud leg section to rise the bottom that the in-process rises to the spud leg section and supports the spud leg section of slope, backstop 30 is used for the spud leg section to rise the in-process and supports the spud leg section of slope tightly, preceding dog 20 and backstop 30 locate the both ends direction of spud leg section respectively, arrange as shown in fig. 2.
And S3.4, arranging sleepers 40 on the steel plates, horizontally hoisting the pile leg sections above the steel plates, horizontally placing the pile leg sections on the arranged sleepers 40, laying the pile leg sections at the lower openings of the pile leg sections through the sleepers 40, removing the lifting hooks after the pile leg sections are laid stably, and showing a schematic diagram of the pile leg section laying as shown in FIG 3.
S4, pile leg section hoisting implementation:
s4.1, installing a lifting lever in a first opening at one end of the pile leg section, connecting a lifting lug at the top of the lifting beam with a main hook of the gantry crane through a lifting hook and a steel wire lifting rope, and connecting a lifting lug at the bottom of the lifting beam with two ends of the lifting lever through the lifting hook and the steel wire lifting rope;
s4.2, slowly hoisting one end of the pile leg section by the aid of the gantry crane through matching of the hoisting beam and the hoisting bar, hoisting the upper end of the pile leg section, pressing a sleeper 40 by a lower opening of the pile leg section, landing a single point at the bottom end of the pile leg section, and slowly turning over the pile leg section from a horizontal state to an inclined state;
s4.3, when the pile leg section is turned over to the state that the angle between the pile leg section and the horizontal plane is 77 degrees, stopping the lifting of the gantry crane, stabilizing the lifting hook, transferring a bottom supporting point of the pile leg section to a front cushion block 20, shifting and lifting the pile leg section to the front cushion block 20 to bear force, abutting the pile leg section by a 10T rear stop block 30, preparing a toggle plate for welding and stopping, continuing the lifting until the pile leg section is upright, and finishing the shifting and lifting of the pile leg section, wherein the lifting hook of the gantry crane can be lifted continuously until the pile leg section is upright, and the lifting hook is lifted as shown in figure 5.
Pile leg sections meeting hoisting conditions are respectively subjected to turning-over operation in the mode, the pile leg sections are folded after hoisting and turning over, and the 1200T pile inserting type rescue and salvage engineering ship is provided with 4 pile legs, and the pile leg sections are hoisted, turned over and folded respectively.
The construction period of the embodiment is shortened, the time is controlled within an allowable range, a hanging bar and single-point landing and turning-over process is used in the dock construction stage, eight pile leg sections of four pile legs are hoisted in the dock for 16 days, the dock construction period is saved, a foundation is laid for the implementation of subsequent project pilot-run large nodes, and the total cost is saved by 44 ten thousand yuan.
(1) The cost for assembling and disassembling the lifting lug is saved by about 16 ten thousand: eight sections spud legs weld 32 lugs altogether, and single lug expense is about 0.5 ten thousand, and single lug design bearing 150 tons, 0.5 day, 2 people, expense are installed and removed to a lug: 2 people 0.5 days 32 x 245 yuan/person =7840 yuan;
(2) 8 sections of piles are connected in a dock, the butt joint work is completed in 16 days, 14 days of construction in the dock (2 thousands of dock cost per day) is saved, the cost is saved by 28 thousands, the original welding lug scheme needs to carry out the work of lug installation, disassembly, coating and the like, the time period of waiting for the lower part to turn over the lug to cut off and carbon plane and polish and coat is about 14 days after the pile leg sections are turned over, and in addition, the cost of influence on other work types and the like during the process of cutting off the lug is saved.
According to the embodiment, the pile legs are segmented firstly, then the pile leg sections are lifted and turned to the vertical state respectively from the horizontal state, the butt joint work of the pile leg segments is carried out, the deflection of the pile leg sections is lifted to pass through the opening through the lifting lever and is matched with the lifting beam, the lifting is realized under the lifting of the gantry crane, lifting lugs do not need to be welded on the pile leg sections, the assembly and disassembly work of a plurality of lifting lugs is avoided, the construction process is simple, the project construction period is shortened, the risk that welding cracks are generated on the welding positions of the pile leg sections and the lifting lugs is avoided, the construction quality is guaranteed, and the construction cost is saved.
The foregoing shows and describes the general principles and features of the present invention, together with the advantages thereof. 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 (5)
1. A pile leg section deflection lifting construction method is characterized in that: the method comprises the following steps:
s1, pile leg segmentation: determining the position of a pile leg section closure opening according to the capacity of hoisting equipment, the structural strength of a pile leg and a hoisting process:
s1.1, selecting the length of sectional division of the pile leg: analyzing the field hoisting capacity, determining the length of the corresponding weight pile leg section, segmenting the pile leg, and determining the position of a closure opening of the segmented pile leg section;
s1.2, calculating the strength of the pile leg, analyzing the strength and the rigidity of the pile leg section according to the length of the pile leg section and a primary hoisting process, and keeping the strength and the rigidity within a stress allowable range;
s1.3, determining the number of sections of the segmented spud legs, limiting according to the lifting height of a gantry crane, hoisting the spud leg sections which cannot be hoisted after undocking, and installing the spud leg sections meeting hoisting conditions in a dock stage;
s2, pile leg subsection construction:
s2.1, completing construction of a pile leg segmented structure according to the division of the pile leg segments and a pile leg construction process;
s2.2, hole opening and outfitting installation of the pile leg sections are completed;
s2.3, finishing the sectional coating of the pile leg;
s3, pile leg section displacement lifting and hoisting preparation:
s3.1, analyzing the structural strength of the pile leg section, formulating a hoisting process that a hoisting tool is arranged in a hole at one end of the pile leg section in a penetrating mode, hoisting one end of the pile leg section through the matching of a hoisting beam and the hoisting tool, landing a single point at the other end of the pile leg section, turning over the pile leg section from a horizontal state to a vertical state, manufacturing the hoisting tool according to the hoisting process, wherein the hoisting tool is a hoisting bar and the hoisting bar is recycled;
s3.2, designing the hoisting weight of the hoisting beam according to the weight of the pile leg section, and carrying out a hoisting test on the hoisting beam before hoisting application;
s3.3, preparing and arranging a heavy block on the site before hoisting, and installing a sling: laying a steel plate on a hoisting site to reduce the influence of turning over operation on a foundation, arranging a left stop block and a right stop block on the steel plate to limit the left and right directions of a pile leg section, arranging a front cushion block and a rear stop block on the steel plate, wherein the front cushion block is used for supporting the bottom end of the pile leg section in the hoisting process of the pile leg section, the rear stop block is used for tightly supporting the inclined pile leg section in the hoisting process of the pile leg section, and the front stop block and the rear stop block are respectively arranged in the directions of two ends of the pile leg section;
s3.4, arranging sleepers on the steel plates, horizontally hoisting the pile leg sections to the position above the steel plates, horizontally placing the pile leg sections on the arranged sleepers, laying the lower openings of the pile leg sections through sleepers, and removing lifting hooks after the pile leg sections are laid stably;
s4, pile leg section hoisting implementation:
s4.1, installing a lifting lever in an opening at one end of the pile leg section, connecting a lifting lug at the top of the lifting beam with a main hook of a gantry crane through a lifting hook and a steel wire lifting rope, and connecting the lifting lug at the bottom of the lifting beam with two ends of the lifting lever through the lifting hook and the steel wire lifting rope;
s4.2, slowly hoisting one end of the pile leg section by the aid of the gantry crane through matching of the hoisting beam and the hoisting bar, hoisting the upper end of the pile leg section, pressing a sleeper by a lower opening of the pile leg section, landing a single point at the bottom end of the pile leg section, and slowly turning over the pile leg section from a horizontal state to an inclined state;
and S4.3, when the pile leg section is turned over to the state that the angle between the pile leg section and the horizontal plane is 77 degrees, stopping the lifting of the gantry crane, stabilizing the lifting hook, transferring a bottom supporting point of the pile leg section to a front cushion block, shifting and lifting the pile leg section to the front cushion block to bear force, abutting the pile leg section with a rear stop block, preparing a toggle plate for welding and stopping, continuing lifting until all the parts are finished, continuing the lifting motion of the lifting hook of the gantry crane, finishing the lifting shifting of the pile leg section until the pile leg section is upright, and sequentially performing turnover operation and lifting and folding operation on the pile leg section meeting the lifting condition.
2. The pile leg segment deflection and lifting construction method according to claim 1, characterized in that: in the step S3.2, the hoisting beam is subjected to a 1.5-time hoisting test before hoisting application, MT detection is performed on all welding seams of the hoisting beam after the trial hoisting is finished, and two hoisting beams are manufactured.
3. The pile leg segment deflection and lifting construction method according to claim 1, characterized in that: in the step S3.3, the steel plate paved on the hoisting site is 25 mm.
4. The pile leg segment deflection and lifting construction method according to claim 1, characterized in that: in step S3.1, the hanging bar structure is: including the hanger body, the both ends of hanger body are equipped with the baffle that two intervals set up respectively, and the space between two baffles is used for the cover to establish the steel wire lifting rope.
5. The pile leg segment deflection and lifting construction method according to claim 1, characterized in that: in the step S3.2, the hanging beam structure is: the lifting device comprises a lifting beam body, lifting lugs are arranged on two sides of the top of the lifting beam body respectively, and lifting lugs are arranged on two sides of the bottom of the lifting beam body respectively.
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| 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 |
| CN105152040A (en) * | 2015-09-08 | 2015-12-16 | 山东海湾吊装工程股份有限公司 | Process for sectionally closing and hoisting pile legs of self-elevating offshore oil platform through crawler crane |
| CN105417403A (en) * | 2016-01-08 | 2016-03-23 | 招商局重工（江苏）有限公司 | Method for installing ultrahigh ultra-large type floating crane in dock |
| CN106149724A (en) * | 2016-06-20 | 2016-11-23 | 上海振华重工集团（南通）有限公司 | Technique is stood up in the spud leg pile pulling of a kind of heavy lifting mechanism |
| CN106638525A (en) * | 2016-10-20 | 2017-05-10 | 南通振华重型装备制造有限公司 | Mounting technology for pile legs and pile shoes of JU2000E type self-elevating drilling platform |
| CN112359804A (en) * | 2020-11-04 | 2021-02-12 | 福建省马尾造船股份有限公司 | Hoisting and mounting method for bolt type pile leg |
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| CN114132830B (en) | 2023-08-29 |
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