CN115837968A - Centering tool and centering installation method for triangular truss type pile leg surrounding well - Google Patents
Centering tool and centering installation method for triangular truss type pile leg surrounding well Download PDFInfo
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- CN115837968A CN115837968A CN202211557743.XA CN202211557743A CN115837968A CN 115837968 A CN115837968 A CN 115837968A CN 202211557743 A CN202211557743 A CN 202211557743A CN 115837968 A CN115837968 A CN 115837968A
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Abstract
The invention discloses a centering tool and a centering installation method for a triangular truss type pile leg surrounding well, and relates to the technical field of ship and ocean engineering. The centering tool comprises a triangular support frame and a clamping plate, a positioning frame is arranged inside the triangular support frame, and the clamping plate is arranged at three top points of the triangular support frame respectively. The centering installation method comprises the following steps: embedding the centering tool in the subsections of the surrounding well; pre-estimating the structural deformation of the surrounding well, setting the deflection distance and rib positions of the pile shoes, and arranging the pile shoes according to the setting; and positioning and welding the upper and lower layer of the surrounding well, checking the perpendicularity and the centering degree of the surrounding well in the welding process, completing the welding of the surrounding well, determining whether the position of the pile shoe needs to be adjusted and marking the center of a new surrounding well again. The invention has the advantages that: welding shrinkage can be effectively monitored during the welding of the surrounding well, the welding sequence can be adjusted through data feedback, the welding amount is more uniform, the subsection alignment is more accurate during welding, the pile leg slotting is more vertical, and the slotting deformation of the pile leg can be controlled.
Description
Technical Field
The invention relates to the technical field of ship and ocean engineering, in particular to a centering tool and a centering installation method for a triangular truss type pile leg surrounding well.
Background
The pile leg structure form of the ocean platform is divided into a truss type pile leg and a cylindrical pile leg. Truss-like spud leg is generally applied to the operation depth of water and is surpassed on the jack-up ocean platform of 60m to require truss-like spud leg can effectively reduce the ocean to the wave load of spud leg, thereby guarantee jack-up ocean platform's stability. The periphery of the triangular truss type pile leg is provided with a pile leg surrounding well, and the bottom of the pile leg is in matched butt joint with the pile shoe.
The general mode that combines together with marking off of seeking of traditional spud leg surrounding well is with total powerstation: 1. finding a ship baseline and a rib position baseline; 2. finding the projection of the pile shoe center datum line according to the offset size and the rib position number on the design drawing, and marking the ground sample of the offset datum line and the rib position datum line respectively; 3. pile shoes are arranged according to the position of the ground sample; 4. folding the surrounding of the pile shoe into sections; 5. closing the surrounding well sections, and after the surrounding well sections are closed, adjusting the position of the pile shoe due to welding shrinkage; 6. and the hoisting pile leg is butted with the pile shoe. The 5 th step is the key of the above steps, the structure of the surrounding well subsection is dense and complex, welding deformation is easy to generate during closure, and the problems possibly caused by welding deformation comprise: (1) The slotted opening of the leg rack plate is enlarged, with the consequence that the adjustable amount of wear plate thickness is reduced, resulting in a wear plate that is too thick or too thin; the wear-resistant plate is arranged on the lifting frame and is specially used for friction when the pile leg is lifted, the thinner the wear-resistant plate is processed, the shorter the subsequent available time is, and the wear-resistant plate is difficult to replace, so that a certain thickness is ensured, and the design service life of the wear-resistant plate is ensured; if the wear plate is too thick, the wear plate loses effectiveness, and the impact load of pile leg lifting is increased; when the wear-resisting plate is too thin, the abrasion allowance of the structure of the lifting frame can be accelerated, and the structural strength is influenced; (2) The lifting surrounding well is staggered up and down in sections, so that steps are left in the slots of the racks, and impact load is possibly generated; (3) The lifting surrounding well slot is not vertical, if not corrected, the whole pile leg will be inclined to one direction; if corrected, the legs will have a large internal stress during lifting and lowering. It is necessary to provide a centering tool and a centering installation method for a triangular truss type leg surrounding well to solve the above problems.
Disclosure of Invention
The invention aims to solve the technical problem of providing a centering tool and a centering installation method for a triangular truss type pile leg surrounding well, which can solve the problems that in the prior art, the lifting surrounding well is easy to misplace in an upper section and a lower section, has large welding deformation and is not perpendicular to the ground due to welding shrinkage in the folding process.
In order to solve the technical problems, the technical scheme of the invention is as follows: a centering tool for a triangular truss type pile leg surrounding well comprises a triangular support frame and a clamping plate, wherein the triangular support frame is an equilateral triangle matched with the structure of the triangular truss type pile leg, a positioning frame is arranged inside the triangular support frame, the positioning frame is vertically arranged on one side of the triangular support frame, one end of the positioning frame is fixedly connected with one vertex of the triangular support frame, and the other end of the positioning frame is fixedly connected with the midpoint of one side of the triangular support frame vertically arranged with the positioning frame;
the three vertexes of the triangular support frame are respectively provided with a clamping plate, the midpoint of the clamping plate is fixedly connected with the vertexes of the triangular support frame, and the clamping plate and the angle bisector at the corresponding vertexes of the triangular support frame are vertically arranged;
the crossing point of the central vertical lines of the three sides of the triangular support frame is a positioning center, and the positioning center is arranged on the positioning frame.
Furthermore, a position hole is formed in the position center of the positioning frame, and a downward plumb bob is hung in the position hole.
Further, the triangular support frame is made of channel steel, and the clamping plate is a steel plate.
A centering installation method for a triangular truss type pile leg surrounding well is characterized by comprising the following steps: the method comprises the following steps:
s1, pile legs, pile shoes, a surrounding well and a lifting frame are respectively manufactured, when the surrounding well is manufactured in a subsection mode, a centering tool is embedded in the subsection of the surrounding well, and the length of a clamping plate of the centering tool is ensured to be capable of being placed in a groove of the surrounding well;
s2, estimating the comprehensive deformation of the structure of the surrounding well deviating from a midship line to be m, wherein m is-20 to 20mm;
s3, well preparing a ground sample center mark on the ground or a pile shoe as (A, FR);
s4, pile shoe prearranging: setting the deviation distance of the pile shoe to be A and the rib position to be FR according to the whole ship arrangement, and arranging the pile shoe to reach the theoretical deviation distance in advance, wherein the rib position is aligned with the designed rib position;
s5, folding the peripheral structure of the surrounding well;
s6, positioning the lower layer surrounding well subsection according to the position of (A + m, FR), and repairing and cutting the structure allowance;
s7, positioning the upper-layer surrounding well to enable the center of the upper-layer surrounding well to be aligned with the lower-layer surrounding well;
s8, welding the upper and lower layers of the surrounding well, hanging a plumb bob downwards in a position hole at the positioning center of the centering tool by a person before welding, tracking the position of the plumb bob hung on the centering tool in the welding process, monitoring the welding shrinkage in the welding process, and checking the verticality and the centering degree of the surrounding well through the centering tool;
s9, welding the upper and lower surrounding wells into a whole, welding the surrounding wells and the peripheral structure together, closely checking the centering degree of the center of the surrounding well and a ground sample line in the welding process, and after the welding is finished, approaching the center of the surrounding well from (A + m, FR) to (A, FR) due to the relation of welding shrinkage;
s10, completing the welding of the surrounding well, checking the deviation between the positioning center of the pile shoe and the positioning center of the surrounding well, and if the deviation is within the range allowed by the tolerance, not adjusting the position of the pile shoe; otherwise, the position of the pile shoe needs to be adjusted;
s11, after the positioning welding of the surrounding well is finished, measuring and marking the center (A0, FR 0) of the new surrounding well again;
s12, mounting the lifting frames, wherein the finally mounted sizes of the three lifting frames are based on (A0, FR 0), and the final tolerance is ensured to be in an allowable range;
and S13, hoisting the pile leg.
Further, in the step S1, when the surrounding well segments are manufactured, if the segments are multi-layered, at least two centering tools need to be arranged to ensure that the segments are aligned and vertically downward.
Further, in the step S8, when the perpendicularity and the alignment degree of the trunk are checked by centering the tool during the welding process, the welding sequence is adjusted by the feedback of data, and the welding amount is uniform.
Further, in the step S6, when the lower surrounding well segment is positioned, the parallelism deviation between the center line and the theoretical rib position line is 1mm.
The invention has the advantages that:
1) When the surrounding well is welded, welding shrinkage in the welding process can be effectively monitored by tracking the position of a plumb bob hung on the centering tool, welding amount is more uniform by a method of adjusting the welding sequence through data feedback, so that during welding, segmentation alignment is more accurate, up-and-down segmentation dislocation is not easy to occur, slotting of pile legs is more vertical, welding stress is more uniformly released, deformation of slotting of the pile legs can be controlled, and construction quality is higher;
2) The condition of subsection centering can be observed at any time through centering tools in the construction process, so that the difficulty of site construction is greatly reduced;
3) The centering tool can play a role in reinforcing the sectional structure of the surrounding well, and the sectional hoisting deformation is reduced.
4) The centering tool can play a role as a working channel.
Drawings
FIG. 1 is a schematic structural diagram of a centering tool according to the present invention;
fig. 2 is a schematic structural view of a leg well and legs and shoes according to an embodiment of the invention;
fig. 3 is a top view of the segment-embedded centering tool for the leg surrounding well in the embodiment of the 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.
The specific implementation mode adopts the following technical scheme: as shown in fig. 1, a well finding tool for a triangular truss type pile leg surrounding well, the well finding tool comprises a triangular support frame 1 and a clamping plate 2, the triangular support frame 1 is an equilateral triangle adapted to a structure of a triangular truss type pile leg 20, the triangular support frame 1 is made of three channel steel with enough width, a positioning frame 3 is arranged inside the triangular support frame 1, the positioning frame 3 is vertically arranged on one side of the triangular support frame 1, one end of the positioning frame 3 is fixedly connected with one vertex of the triangular support frame 1, the other end of the positioning frame 3 is fixedly connected with a midpoint of one side of the triangular support frame 1 vertically arranged with the other end of the positioning frame 3, the triangular support frame 1 and the positioning frame 3 are welded into a whole, the positioning frame 3 is the channel steel with enough width, and the channel steel has enough strength, so that the well finding tool 10 can be used as a pedestrian operation channel.
Three vertexes of the triangular support frame 1 are respectively provided with a clamping plate 2, the middle point of the clamping plate 2 is fixedly connected with the vertex of the triangular support frame 1, the equal angle bisector of the clamping plate 2 and the corresponding vertex of the triangular support frame 1 is vertically arranged, and the clamping plate 3 is a steel plate.
The intersection point of the central vertical lines of the three sides of the triangular support frame 1 is a positioning center, the positioning center is arranged on the positioning frame 3, a position hole 4 is arranged at the positioning center on the positioning frame 3, and a downward plumb bob is hung in the position hole 4.
A centering installation method for a triangular truss type pile leg surrounding well comprises the following steps:
s1, pile legs 20, pile shoes 30, a surrounding well 40 and a lifting frame 50 are manufactured respectively, when the surrounding well 40 is manufactured in a segmented mode, a centering tool 10 is pre-embedded in the segments of the surrounding well 40, as shown in figure 3, the length of a clamping plate 2 of the centering tool 10 is ensured to be capable of being placed in a groove of the surrounding well 40, the centering tool 10 can also play a role in strengthening the segmented structure of the surrounding well 40, segmented hoisting deformation is reduced, when the surrounding well 40 is manufactured in a segmented mode, if the segments are of multiple layers, at least two sets of centering tools 10 need to be arranged, and therefore the segments are aligned and vertically downward.
S2, estimating the comprehensive deformation of the structure of the surrounding well 40 deviating from a midship line to be m, wherein m is-20 to 20mm.
S3, well-done ground sample center on the ground or shoe 30 is marked (a, FR).
S4, pre-arranging the pile shoe 30: with reference to the full-vessel layout, the offset distance of the shoe 30 is set to a, the rib position is set to FR, and the shoe 30 is pre-laid to the theoretical offset distance, and the rib position is aligned with the design rib position.
And S5, closing the peripheral structure of the surrounding well 40.
S6, positioning the lower-layer surrounding well 40 subsection according to the position of (A + m, FR), repairing and cutting the structural allowance, and when the lower-layer surrounding well 40 subsection is positioned, the parallelism deviation between the central line and the theoretical rib position line is 1mm.
And S7, positioning the upper-layer surrounding well 40 to enable the center of the upper-layer surrounding well 40 to be aligned with the lower-layer surrounding well 40.
S8, welding the upper and lower layers of the surrounding well 40, hanging a plumb bob downwards in a position hole 4 at the positioning center of the centering tool 10 by a person before welding, tracking the position of the plumb bob hung on the centering tool 10 in the welding process, monitoring the welding shrinkage in the welding process, checking the verticality and the centering degree of the surrounding well 40 through the centering tool 10, and adjusting the welding sequence and the welding amount through data feedback when checking the verticality and the centering degree of the surrounding well 40 through the centering tool 10 in the welding process.
S9, after the upper and lower layers of the surrounding well 40 are welded into a whole, the surrounding well 40 and the peripheral structure are welded together, the centering degree of the center of the surrounding well 40 and the ground sample line is closely checked in the welding process, and after the welding is finished, the center of the surrounding well 40 approaches from (A + m, FR) to (A, FR) due to the relation of welding shrinkage.
S10, completing welding of the surrounding well 40, checking deviation between the positioning center of the pile shoe 30 and the positioning center of the surrounding well 40, and if the deviation is within the allowable range of tolerance, adjusting the position of the pile shoe 30 is not needed, otherwise, adjusting the position of the pile shoe 30 is needed.
S11, positioning welding of the surrounding well 40 is finished, and the center (A0, FR 0) of the new surrounding well 40 is measured and marked again.
And S12, installing the lifting frame 50, wherein the finally installed sizes of the three lifting frames 50 are based on (A0, FR 0), and the final tolerance is ensured to be within an allowable range.
S13, hoisting the spud leg 20, and installing the subsequent spud leg 20, wherein a schematic installation diagram of the spud leg surrounding well 40, the spud shoe 30, and the lifting frame 50 is shown in fig. 2, the lifting frame 50 is a link connecting the offshore platform and the spud leg 20, the spud leg 20 and the lifting frame 50 realize climbing and descending of the offshore platform through engagement of a spud leg rack and a lifting gear box gear, the lifting frame 50 is arranged on the periphery of the spud leg 20, and the lifting frame 50 can also realize the function of fixing the direction of the spud leg 20, so as to ensure that the spud leg 20 is always vertically upward.
When the surrounding well is welded, the welding shrinkage in the welding process can be effectively monitored by tracking the position of the plumb bob hung on the centering tool, the welding amount can be more uniform by adjusting the welding sequence through the feedback of data, so that the alignment of the sections is more accurate during welding, the dislocation of the upper section and the lower section is not easy to occur, the slotting of the pile leg is more vertical, the welding stress is more uniformly released, the deformation of the slotting of the pile leg can be controlled, and the construction quality is higher; the condition of subsection centering can be observed at any time by finding the centering tool in the construction process, so that the difficulty of site construction is greatly reduced.
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 (6)
1. The utility model provides a frock of seeking of triangle truss-like spud leg surrounding well which characterized in that: the pile supporting frame comprises a triangular supporting frame and a clamping plate, wherein the triangular supporting frame is an equilateral triangle matched with the structure of a triangular truss type pile leg, a positioning frame is arranged inside the triangular supporting frame, the positioning frame is vertically arranged on one side of the triangular supporting frame, one end of the positioning frame is fixedly connected with one vertex of the triangular supporting frame, and the other end of the positioning frame is fixedly connected with the middle point of one side of the triangular supporting frame vertically arranged with the positioning frame;
three vertexes of the triangular support frame are respectively provided with a clamping plate, the midpoint of the clamping plate is fixedly connected with the vertexes of the triangular support frame, and the clamping plate and the angle bisector at the corresponding vertexes of the triangular support frame are vertically arranged;
the intersection point of central vertical lines of three sides of the triangular support frame is a positioning center, and the positioning center is arranged on the positioning frame;
a position hole is formed in the position center of the positioning frame, and a downward plumb bob is hung in the position hole.
2. The finding tool for the triangular truss type pile leg surrounding well according to claim 1, is characterized in that: the triangular support frame is made of channel steel, and the clamping plate is a steel plate.
3. The centering installation method for the triangular truss type pile leg surrounding well, according to claim 1, is characterized in that: the method comprises the following steps:
s1, pile legs, pile shoes, a surrounding well and a lifting frame are respectively manufactured, when the surrounding well is manufactured in a subsection mode, a centering tool is embedded in the subsection of the surrounding well, and the length of a clamping plate of the centering tool is ensured to be capable of being placed in a groove of the surrounding well;
s2, estimating the comprehensive deformation of the structure of the surrounding well deviating from a midship line to be m, wherein m is-20 to 20mm;
s3, well preparing a ground sample center mark on the ground or a pile shoe as (A, FR);
s4, pile shoe pre-arrangement: setting the deviation distance of the pile shoe to be A and the rib position to be FR according to the whole ship arrangement, and arranging the pile shoe to reach the theoretical deviation distance in advance, wherein the rib position is aligned with the designed rib position;
s5, folding the peripheral structure of the surrounding well;
s6, positioning the lower layer surrounding well subsection according to the position of (A + m, FR), and repairing and cutting the structure allowance;
s7, positioning the upper-layer surrounding well to enable the center of the upper-layer surrounding well to be aligned with the lower-layer surrounding well;
s8, welding the upper and lower layers of the surrounding well, hanging a plumb bob downwards in a position hole in the positioning center of the centering tool by a person before welding, tracking the position of the plumb bob hung on the centering tool in the welding process, monitoring the welding shrinkage in the welding process, and checking the verticality and the centering degree of the surrounding well through the centering tool;
s9, welding the upper and lower surrounding wells into a whole, welding the surrounding wells and the peripheral structure together, closely checking the centering degree of the center of the surrounding well and a ground sample line in the welding process, and after the welding is finished, approaching the center of the surrounding well from (A + m, FR) to (A, FR) due to the relation of welding shrinkage;
s10, completing the welding of the surrounding well, checking the deviation between the positioning center of the pile shoe and the positioning center of the surrounding well, and if the deviation is within the range allowed by the tolerance, not adjusting the position of the pile shoe; otherwise, the position of the pile shoe needs to be adjusted;
s11, after the positioning welding of the surrounding well is finished, measuring and marking the center (A0, FR 0) of the new surrounding well again;
s12, mounting the lifting frames, wherein the finally mounted sizes of the three lifting frames are based on (A0, FR 0), and the final tolerance is ensured to be in an allowable range;
and S13, hoisting the pile leg.
4. The centering installation method of the triangular truss type pile leg surrounding well according to claim 3, characterized in that: in the step S1, when the surrounding well is segmented, if the segments are multi-layered, at least two centering tools need to be arranged to ensure that the segments are aligned and vertically downward.
5. The centering installation method of the triangular truss type pile leg surrounding well according to claim 3, characterized in that: in the step S8, when the verticality and the alignment degree of the trunk are checked through the centering tool in the welding process, the welding sequence is adjusted through data feedback, and the welding quantity is uniform.
6. The centering installation method of the triangular truss type pile leg surrounding well according to claim 3, characterized in that: in the step S6, when the lower surrounding well section is positioned, the deviation of the parallelism between the central line and the theoretical rib position line is 1mm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211557743.XA CN115837968A (en) | 2022-12-06 | 2022-12-06 | Centering tool and centering installation method for triangular truss type pile leg surrounding well |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211557743.XA CN115837968A (en) | 2022-12-06 | 2022-12-06 | Centering tool and centering installation method for triangular truss type pile leg surrounding well |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116620515A (en) * | 2023-07-19 | 2023-08-22 | 中船黄埔文冲船舶有限公司 | Mounting, positioning and folding method for lifting foundation of self-elevating type working platform |
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2022
- 2022-12-06 CN CN202211557743.XA patent/CN115837968A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116620515A (en) * | 2023-07-19 | 2023-08-22 | 中船黄埔文冲船舶有限公司 | Mounting, positioning and folding method for lifting foundation of self-elevating type working platform |
| CN116620515B (en) * | 2023-07-19 | 2023-11-03 | 中船黄埔文冲船舶有限公司 | Mounting, positioning and folding method for lifting foundation of self-elevating type working platform |
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