CN104805819A - Folding method of cantilever beam - Google Patents
Folding method of cantilever beam Download PDFInfo
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- CN104805819A CN104805819A CN201510115665.1A CN201510115665A CN104805819A CN 104805819 A CN104805819 A CN 104805819A CN 201510115665 A CN201510115665 A CN 201510115665A CN 104805819 A CN104805819 A CN 104805819A
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- main hull
- semi girder
- dock
- slippage
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
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Abstract
The invention provides a folding method of a cantilever beam. The folding method comprises the following steps of performing ballast adjustment on a main hull which floats in the water so as to enable the gravity of the main hull to adapt to the gravity of the main hull after the cantilever beam to be assembled is folded in place; dragging the main hull after the ballast adjustment into a dock to be near a vertical wall of the dock; adjusting the water level in the dock so as to enable the main hull which floats in the static water of the dock to be aligned to the vertical direction of the cantilever beam, adjusting the lateral direction of the main hull so as to perform the lateral alignment on the main hull and the cantilever beam and fixing the main hull; enabling the cantilever beam to slide towards the main hull which is fixed at the position of the dock and performing the ballast adjustment on the main hull along with the sliding of the cantilever beam until the cantilever beam slides to a set position in the main hull. According to the folding method of the cantilever beam, the folding accuracy can be improved and the friction damage to the cantilever beam in the sliding process is greatly reduced.
Description
Technical field
The present invention relates to ocean engineering field, particularly a kind of semi girder folding method.
Background technology
The component number of marine engineering equipment is numerous, bulky, it is high that it closes up assembly precision requirement, general vertical error requires to be no more than several millimeters, horizontal direction error is no more than twenties millimeters, and then makes the more and more difficult development adapting to existing marine engineering equipment of traditional assembling mode of closing up.
For closing up of semi girder in self-elevating drilling platform and main hull, need semi girder and main hull to close up in the construction of existing self-elevating drilling platform, the construction of whole ship can be completed.The mode of closing up of existing semi girder and main hull mostly adopts segmental hoisting to close up method, is divided into several segmentation by semi girder, and each segmentation lifts in certain sequence and is brought together on main hull to complete closing up of semi girder and main hull.
But segmental hoisting closes up method and greatly elongated construction period, therefore existing other two kinds are closed up method and are also applied in closing up of semi girder and main hull, with shortening production cycle.Wherein, one is pitching pile sliding method, namely the jacking system of self-elevating drilling platform is utilized to make spud leg stand on harbour marine site, pre-ballast ensures that spud leg is stood firm, and regulates main hull height, corresponding with semi girder, slippage semi girder realizes closing up, but this mode of closing up is easy to the interference being subject to extraneous factor, in the slipping of semi girder, there is a large amount of friction damage.Another kind adopts floating rendezvous method slippage semi girder on barge, then docked with floating main hull by barge, and will semi girder slippage to main hull be closed up in realization, it is many that this method closes up step, also exists and close up the low defect of precision.
Summary of the invention
One object of the present invention to be to solve in prior art semi girder and main hull in self-elevating drilling platform to close up precision low and in the slipping of semi girder, there is the defect of a large amount of friction damage;
Another object of the present invention be to provide a kind of can improve close up precision and reduce greatly the semi girder of the friction damage occurred in the slipping of semi girder folding method.
For solving the problems of the technologies described above, the present invention adopts following technical scheme:
According to an aspect of the present invention, the invention provides a kind of folding method of semi girder, comprise the steps:
Adjust and carry the main hull that floats in water, after the center of gravity of described main hull and semi girder to be assembled being closed up put in place, the center of gravity of main hull adapts;
Main hull after being carried by described tune is dragged in dock, other by dock wall;
Regulate water level in dock, make to float on the vertical contraposition of main hull in the hydrostatic of dock and semi girder, then adjust orientation, main hull left and right, to carry out left and right contraposition with semi girder, and fixing described main hull;
Make described semi girder to the main hull slippage of being fixed on dock, and carry the center of gravity of described main hull, until described semi girder slides onto the desired location in main hull along with the slippage of described semi girder is adjusted.
Preferably, described tune carries the main hull floated in water, and the step that after the center of gravity of described main hull and semi girder to be assembled being closed up put in place, the center of gravity of main hull adapts comprises:
Ballast adjustment is carried out to the main hull floated in water, makes the ballast water capacity that in described main hull, semi girder place rigging position is corresponding corresponding with default ballast water capacity;
Main hull after ballast described in leveling regulates.
Preferably, water level in described adjustment dock, make to float on the vertical contraposition of main hull in the hydrostatic of dock and semi girder, then adjust orientation, main hull left and right, to carry out left and right contraposition with semi girder, and the step of fixing described main hull comprises:
Obtain the overhead height of semi girder assembling stand in described main hull;
The waterline in described dock is regulated according to the overhead height of described semi girder assembling stand, to carry out vertical contraposition, make described cantilever beam base plate to be assembled and described semi girder assembling stand be in same level, and left and right contraposition is carried out to described main hull and semi girder;
Same level is in and the main hull of left and right contraposition with described semi girder described in fixing.
Preferably, described in make described semi girder to the main hull slippage of being fixed on dock, and carry the center of gravity of described main hull along with the slippage of described semi girder is adjusted, until described semi girder slides onto the step of the desired location in main hull, described method also comprises:
Semi girder described in ground grading integral constructing around dock;
Build the semi girder obtained described in jacking, under described semi girder, lay slide rail, slide rail is laid and is extended to dock limit.
Preferably, described in make described semi girder to the main hull slippage of being fixed on dock, and carry the center of gravity of described main hull along with the slippage of described semi girder is adjusted, until the step of desired location that described semi girder slides onto in main hull body comprises:
Determine the substep transfer weight of described semi girder according to the center of gravity of described semi girder, the substep transfer weight of described semi girder is multiple;
The slippage of semi girder to main hull is carried out respectively according to multiple substep transfer weight of described semi girder, and when described semi girder slippage reaches substep transfer weight to the weight of main hull, corresponding ballast water is discharged, until semi girder slides onto the desired location in described main hull according to the part moment of flexure of described substep transfer weight and setting.
Preferably, between described main hull and dock wall, Anti-collision fender is set.
Preferably, described method also comprises:
When described semi girder is to described main hull slippage, finely tune the ballast water capacity of described main hull, to make flush with semi girder assembling stand top in main hull or be in preset height scope higher than the height at semi girder assembling stand top in described main hull bottom described semi girder bottom described semi girder.
Preferably, described semi girder carries out thrusting slip or traction slippage by the sliding control assembly arranged.
Preferably, described sliding control assembly comprises and is wound around the winch of described semi girder, the running block being installed on semi girder front end and the fixed pulley group be fixed in described main hull by twisted rope.
Preferably, described in make described semi girder to the main hull slippage of being fixed on dock, and carry the center of gravity of described main hull along with the slippage of described semi girder is adjusted, until described semi girder slides onto the step of the desired location in main hull, described method also comprises:
Slide onto the semi girder of desired location described in fixing in described main hull, and described main hull is hauled out described dock.
As shown from the above technical solution, advantage of the present invention and good effect are:
In the present invention, first the main hull floated in water is carried out tune to carry, center of gravity after closing up with it to make the center of gravity of main hull adapts, for closing up between semi girder and main hull lays the foundation, pull into in dock by adjusting the main hull after carrying, by the exactitude position that dock carries out between main hull and semi girder to the Lentic environment that the controllability of height of water level and its provide, and then effectively ensured and close up precision, and because in the process of closing up, main hull floats in water all the time, greatly reduce semi girder and slide onto the friction damage occurred in the process of main hull, make closing up of semi girder and main hull safer, controlled.
Accompanying drawing explanation
Fig. 1 is the flow chart of the folding method of semi girder in an embodiment;
Fig. 2 adjusts in Fig. 1 to carry the main hull that floats in water, the method flow diagram that after the center of gravity of described main hull and semi girder to be assembled being closed up put in place, the center of gravity of main hull adapts;
Fig. 3 floats on main hull in the hydrostatic of dock and semi girder carries out contraposition in Fig. 1, and the method flow diagram of fixing main hull;
Fig. 4 is the flow chart closing up front preparation of semi girder in another embodiment;
The center of gravity schematic diagram of semi girder when Fig. 5 is semi girder substep slippage in an embodiment;
Fig. 6 is the schematic diagram that in Fig. 5, the Part I of semi girder slides onto main hull;
Fig. 7 is the schematic diagram that in Fig. 6, the Part II of semi girder slides onto main hull;
Fig. 8 is the schematic diagram that in Fig. 6, the Part III of semi girder slides onto main hull;
Fig. 9 is the schematic diagram that in Fig. 6, the Part IV of semi girder slides onto main hull;
Figure 10 is the dock at semi girder place and the top view of main hull in an embodiment;
Figure 11 is the dock at semi girder place and the lateral view of main hull in Figure 10;
Figure 12 is the top view in the semi girder slipping in Figure 10;
Figure 13 is the lateral view of semi girder slipping in Figure 12;
Figure 14 is the top view that semi girder slides onto main hull;
Figure 15 is the lateral view that in Figure 14, semi girder slides onto main hull;
Figure 16 is the partial enlarged drawing of Figure 11;
Figure 17 is the top view of semi girder build the side in an embodiment.
Detailed description of the invention
The exemplary embodiment embodying feature & benefits of the present invention will describe in detail in the following description.Be understood that the present invention can have various changes on different embodiments, it neither departs from the scope of the present invention, and explanation wherein and to be shown in be use when explain in essence, and be not used to limit the present invention.
The invention provides a kind of folding method of semi girder, wherein, it should be noted that, the maritime platform that semi girder is applied can be self-elevating drilling platform.Concrete, self-elevating drilling platform includes main hull, semi girder, rig floor, derrick, spud leg and shoe, wherein, in drilling well duty, the semi girder one end closed up with main hull will be closed up to be arranged on main hull, the other end is unsettled, rig floor is arranged on the free end of semi girder, derrick installation is on rig floor, and spud leg top is through main hull, and shoe is installed in bottom, be connected by lifting gear between spud leg with main hull, therefore, as shown in Figure 1, the folding method of semi girder provided by the invention comprises the steps:
Step 110, adjusts and carries the main hull that floats in water, and after the center of gravity of main hull and semi girder to be assembled being closed up put in place, the center of gravity of main hull adapts.
In the present embodiment, the tune carrying out the center of gravity of main hull by loading ballast water carries, and makes the center of gravity of the main hull being loaded with ballast water and semi girder close up the center of gravity being assembled to main hull consistent or close, and then ensure that the stability of main hull.
In self-elevating drilling platform, by floating for lower water after main hull integral constructing completes, according to semi girder close up put in place after main hull center of gravity to the main hull floated in water carry out tune carry, main hull center of gravity after tune is carried and semi girder close up put in place after main hull center of gravity consistent or close, and then it is less to ensure that semi girder slides onto main hull centre-of gravity shift in the process of main hull by dock, for the slippage of semi girder provides stable environment.
Further, in the construction of self-elevating drilling platform, main hull complete integral constructing after by floating for lower water, carry out closing up of main hull and semi girder to facilitate.
Step 130, will adjust the main hull after carrying to be dragged in dock, other by dock wall.
In the present embodiment, complete center of gravity and adjust the main hull carried to be pulled in dock, and be in floating state all the time.Because the water environment in dock can not be subject to the impact of the external factor such as tide, sea bed planeness, therefore for main hull provides Lentic environment, and then eliminate the external factor such as tide, sea bed planeness caused risk and restriction are closed up to semi girder and main hull.
Step 150, regulates water level in dock, makes to float on the main hull in the hydrostatic of dock and the vertical contraposition of semi girder, then adjust orientation, main hull left and right, and semi girder carries out left and right contraposition, and fixing main hull.
In the present embodiment, semi girder is that integral constructing obtains, and therefore, can carry out the integral constructing of semi girder and main hull body simultaneously, and then while improve integrality, also substantially reduce the construction period of maritime platform in maritime platform.
Dock is fixing, actionless, main hull is arranged in the Lentic environment that dock provides, semi girder is then placed on dock, therefore, need to carry out contraposition to main hull and fixing, with make main hull is arranged be in same plane for the desired location placing semi girder with current semi girder position and align in left and right, and then be convenient to semi girder to slide onto desired location swimmingly.
By the controllability of dock water level, will precisely achieve the vertical contraposition of dock internal cantilever beam.
In a preferred embodiment, the bollard utilized on dock limit is fixed main hull.
Step 170, makes semi girder to the main hull slippage of being fixed on dock, and carries the center of gravity of main hull, until semi girder slides onto the desired location in main hull along with the slippage of semi girder is adjusted.
In the present embodiment, semi girder is slid onto the desired location in main hull by dock, and this desired location is the installation site of semi girder on main hull.Along with the slippage of semi girder on main hull, will the center of gravity of semi girder constantly be changed, therefore, will constantly adjust the center of gravity of carrying main hull, and then ensure the steadiness of main hull.
In one embodiment, as shown in Figure 2, step 110 as above comprises:
Step 111, carries out ballast adjustment to the main hull floated in water, makes the ballast water capacity that the rigging position at semi girder place in main hull is corresponding corresponding with default ballast water capacity.
In the present embodiment, choose according to the Calculating Torque during Rotary of ballast water capacity in main hull the loading that ballast compartment that in main hull, semi girder place rigging position is corresponding carries out ballast water, make the ballast water capacity in this ballast compartment reach default ballast water capacity.Such as, default ballast water capacity can be 3000 tons, and the ballast water capacity of main hull stern at least reaches default ballast water capacity.
In a preferred embodiment, rigging position is positioned at the stern of main hull, therefore, the ballast compartment of main hull stern will be carried out to the loading of ballast water.
Regulated by the ballast in main hull, after making horizontal, the longitudinal center of gravity of main hull and semi girder close up under the effect of ballast water to put in place, the center of gravity of main hull adapts, such as, in main hull, after ballast regulates horizontal, the longitudinal center of gravity of main hull be equal to semi girder close up put in place after the center of gravity of main hull, or compared with closing up the center of gravity after putting in place with semi girder, be slightly partial to main hull stern.
Step 113, the main hull after trimming ballast regulates.
In the present embodiment, the ballast water of other ballast compartment in main hull is regulated, with by main hull leveling, ensure the smooth and easy slippage of semi girder on main hull further.
In one embodiment, as shown in Figure 3, the detailed process of step 150 as above is:
Step 151, obtains the overhead height of semi girder assembling stand in main hull.
In the present embodiment, in main hull semi girder assembling stand be semi girder close up put in place after the holder of semi girder on main hull, the difference in height therefore between semi girder assembling stand and dock place plane will determine semi girder assembling stand whether swimmingly by dock place planar slip to main hull.
Concrete, obtain the overhead height of semi girder assembling stand in main hull according to main hull moldeed depth, draft and semi girder assembling stand height, namely
Overhead height=main hull moldeed depth-draft+semi girder the assembling stand of semi girder assembling stand.
Step 153, regulates the waterline in dock, to carry out vertical contraposition, makes cantilever beam base plate to be assembled and semi girder assembling stand be in same level, and carry out left and right contraposition to main hull and semi girder to be assembled according to the overhead height of semi girder assembling stand.
In the present embodiment, water filling in dock, makes the waterline in dock rise, until the overhead height of distance and semi girder assembling stand between the waterline risen and cantilever beam base plate quite, now, in main hull, semi girder assembling stand flushes with cantilever beam base plate.
In addition, also utilize the mooring cable on dock to regulate the orientation of main hull, make main hull and semi girder left and right directions exactitude position, thus complete the contraposition between dock internal cantilever beam and main hull.
Step 155, fixing and semi girder is in same level and the main hull of left and right contraposition.
In the present embodiment, the main hull completing contraposition utilizes mooring cable to be fixed by the bollard on bollard on dock and main hull.
As shown in Figure 4, in one embodiment, before step 170, method as above also comprises:
Step 410, the ground grading integral constructing semi girder around dock.
Step 430, the semi girder obtained is built in jacking, under semi girder, lay slide rail, and slide rail is laid and extended to dock limit.
In the present embodiment, the semi girder slid onto on main hull is as a whole, to substantially increase the integrality that semi girder is built.The semi girder completing construction, by Lifting Equipment jackings such as jack, lays slide rail below semi girder, and slide rail is laid and extended to dock limit, thinks that the slippage of semi girder lays the foundation.
In one embodiment, the detailed process of step 170 as above is: by slide rail by semi girder to being fixed on the other main hull slippage of dock, and the ballast water discharged according to the position of semi girder in main hull of slippage in main hull, in the process shifted to main hull by slide rail to keep semi girder, the stability of main hull is until semi girder slides onto the desired location in main hull.
In the present embodiment, this desired location is semi girder assembling stand, and slide rail is initially extend to dock limit with semi girder position in dock, makes semi girder to main hull slippage under the effect of slide rail.
In the process of semi girder slippage, along with the continuous change of semi girder position in dock, constantly regulate the center of gravity of main hull, to keep the steady of main hull.
In one embodiment, for jack up drilling platform, semi girder closes up complete, and whole ship top-ups after having built substantially.So when semi girder does not close up, because stern lacks semi girder, so have very large trim by head, need to load a large amount of ballast water to balance at stern.
So suitable cabin can be selected to load the ballast water being equivalent to semi girder weight, realize main ship and top-up.Discharge when semi girder closes up.If semi girder weight to be closed up is 3000 tons, relative to the relevant position of main hull center of gravity after closing up with semi girder, load ballast water 3000 tons.
In the slipping of semi girder to main hull, in order to reduce operating procedure, reducing operational risk, generally semi girder slippage substep being carried out.Semi girder stern has rig floor, in slippage, with weight transfer for substep foundation, not with skidding distance substep.
When carrying out step by step, first determine the center of gravity of semi girder.If semi girder length is 56 meters, semi girder slippage can be divided into four parts.
Concrete, by the substep transfer weight of the center of gravity determination semi girder according to semi girder, the substep transfer weight of this semi girder is multiple.
The slippage of semi girder to main hull is carried out respectively according to multiple substep transfer weight of semi girder, and when semi girder slippage reaches substep transfer weight to the weight of main hull, corresponding ballast water is discharged, until semi girder slides onto the desired location in main hull according to the part moment of flexure of substep transfer weight and setting.
That is, as shown in Figures 5 to 9, when in the 1000 tons of slippages to main hull 630 of semi girder 501 Part I, main hull 630 is discharged 1000 tons of ballast waters and is provided corresponding buoyancy, discharges ballast water center of gravity and semi girder 501 slippage part center of gravity of going on board and adapts; When in Part II 500 tons of slippages to main hull 630, main hull 630 is discharged 1000 tons of ballast waters and is provided corresponding buoyancy and part moment of flexure, and moment of flexure is enough to tilt the semi girder 501 also do not slided on main hull 630 and amounts to 500 tons of weight; By in Part III 1000 tons of slippages to main hull 630 time, main hull 630 is discharged 1000 tons of ballast waters and is provided corresponding buoyancy and part moment of flexure, and moment of flexure is enough to tilt the semi girder 501 also do not slided on main hull 630 and amounts to 500 tons of weight; Finally by Part IV 500 tons of slippages on main hull 630 relevant position.In the process, main hull 630 has trim by head a little, to prevent dock wall to the concentrated stress of semi girder 501 base plate, meanwhile, is also beneficial to the bow slippage to main hull 630.
In one embodiment, between the stern of main hull and dock wall, Anti-collision fender is set, to make main hull and dock elasticity abut, and then effectively can avoids the direct collision of main hull and dock, greatly improve safety.
In one embodiment, method as above also comprises the steps:
When semi girder is to main hull slippage, the ballast water capacity of fine setting main hull, to make flush with semi girder assembling stand top in main hull or be in preset height scope higher than the height at semi girder assembling stand top in main hull bottom component bottom semi girder.
In the present embodiment, to carry out in the process of closing up to main hull slippage at semi girder, if in height occur misplacing between semi girder assembling stand top bottom the semi girder on dock and in main hull, be not in same level, then need to finely tune the ballast water capacity of main hull, to guarantee that semi girder slides onto semi girder assembling stand smoothly.
In preferred embodiment, main hull is also provided with the screens that matches with component supporting seat with securing part, and therefore, the position according to screens arranges by preset height scope.
After the semi girder that dock limit is vertical, orientation, left and right is all fixed and the main hull floated in water overlap, both just become to be integrated, and follow-up slippage is easy to control, and greatly improves the controllability of closing up process.
In one embodiment, main hull carries out thrusting slip or traction slippage by the sliding control assembly arranged.This sliding control assembly comprises by the winch of twisted rope winding component, the running block being installed on semi girder front end and the fixed pulley group be fixed in main hull.Concrete, as shown in Figure 10, in self-elevating drilling platform, sliding control assembly comprise by twisted rope be wound around semi girder 501 winch 510, be installed on semi girder 501 front end and the slide running block 530 that is arranged in slide rail 503 and the fixed pulley group 550 be fixed in main hull.
In one embodiment, after above-mentioned steps 170, method as above also comprises:
In main hull, fixedly slide onto the semi girder of desired location, and main hull is hauled out dock, complete closing up between semi girder and main hull.
The folding method of semi girder as above is set forth, for self-elevating drilling platform below in conjunction with a specific embodiment.In self-elevating drilling platform, the original state of semi girder 501 as shown in Figure 10 and Figure 11, and that is, the semi girder 501 of integral constructing is placed on the slide rail 505 of dock 610.
Adjust and carry the main hull 630 that do not close up with semi girder 501, after the center of gravity of main hull 630 and semi girder 501 being closed up put in place, the center of gravity of main hull 630 adapts, and pulls main hull 630 into dock 610, as shown in Figure 10 and Figure 11.
In the Lentic environment that dock 610 provides, main hull 630 and semi girder 501 carry out contraposition, and fixing main hull 630, as shown in Figure 12 and Figure 13, semi girder 501 is to main hull 630 slippage, the center of gravity of carrying main hull is constantly adjusted in slippage along with semi girder 501, until semi girder 501 slides onto the desired location in main hull 630, namely as shown in Figure 14 and Figure 15.
As shown in figure 16, close up in process at main hull 630 and semi girder 501, maintenance a point and b point are flushed or a point a little more than b point preset height scope, and under the effect of Anti-collision fender 650, make main hull 630 and dock 610 elasticity abut.
In addition, as shown in figure 17, in self-elevating drilling platform as above, semi girder 501 and closing up of main hull 630 can be applicable to closing up of multiple semi girder 501.
That is, can walk abreast and build multiple semi girder 501, such as semi girder A, semi girder B, semi girder C, semi girder D, semi girder E etc., to arrange closing up of multiple semi girders 501 and corresponding main hull 630 according to the difference of closure time.
First, semi girder A, semi girder B, the semi girder C of parallel construction close up in advance, and corresponding main hull A, main hull B, main hull C are dragged to relevant position in dock 610 in order successively, after closing up, haul out dock 610 successively.
Semi girder D, semi girder E etc. that disembark depressed place 610 is slightly far away, close up after having closed up hauling-out dock 610 at semi girder A, semi girder B, semi girder C.
And then the mass construction of self-elevating drilling platform is achieved by said process.
In the folding method of semi girder as above, owing to belonging to shaded areas in dock, its water surface is comparatively tranquil, is not vulnerable to the impact of external environment condition, therefore, will greatly improve stability and controllability that component close up, and then is conducive to raising and closes up precision.
In addition, due to dock regulating level, therefore external environment condition is shielded further, the impact of such as tide, greatly reduces the risk of closing up and existing in process, simultaneously, make main hull not be subject to the restriction of self moldeed depth and drinking water, require also relatively low to the ballast ability of main hull.
Although describe the present invention with reference to several exemplary embodiment, should be appreciated that term used illustrates and exemplary and nonrestrictive term.Spirit or the essence of invention is not departed from because the present invention can specifically implement in a variety of forms, so be to be understood that, above-mentioned embodiment is not limited to any aforesaid details, and explain widely in the spirit and scope that should limit in claim of enclosing, therefore fall into whole change in claim or its equivalent scope and remodeling and all should be claim of enclosing and contained.
Claims (10)
1. a folding method for semi girder, is characterized in that, comprises the steps:
Adjust and carry the main hull that floats in water, after the center of gravity of described main hull and semi girder to be assembled being closed up put in place, the center of gravity of main hull adapts;
Main hull after being carried by described tune is dragged in dock, other by dock wall;
Regulate water level in dock, make to float on the vertical contraposition of main hull in the hydrostatic of dock and semi girder, then adjust orientation, main hull left and right, to carry out left and right contraposition with semi girder, and fixing described main hull;
Make described semi girder to the main hull slippage of being fixed on dock, and carry the center of gravity of described main hull, until described semi girder slides onto the desired location in main hull along with the slippage of described semi girder is adjusted.
2. method according to claim 1, is characterized in that, described tune carries the main hull floated in water, and the step that after the center of gravity of described main hull and semi girder to be assembled being closed up put in place, the center of gravity of main hull adapts comprises:
Ballast adjustment is carried out to the main hull floated in water, makes the ballast water capacity that in described main hull, semi girder place rigging position is corresponding corresponding with default ballast water capacity;
Main hull after ballast described in leveling regulates.
3. method according to claim 2, is characterized in that, water level in described adjustment dock, make to float on the vertical contraposition of main hull in the hydrostatic of dock and semi girder, then adjust orientation, main hull left and right, to carry out left and right contraposition with semi girder, and the step of fixing described main hull comprises:
Obtain the overhead height of semi girder assembling stand in described main hull;
The waterline in described dock is regulated according to the overhead height of described semi girder assembling stand, to carry out vertical contraposition, make described cantilever beam base plate to be assembled and described semi girder assembling stand be in same level, and left and right contraposition is carried out to described main hull and semi girder;
Same level is in and the main hull of left and right contraposition with described semi girder described in fixing.
4. method according to claim 1, it is characterized in that, describedly make described semi girder to the main hull slippage of being fixed on dock, and carry the center of gravity of described main hull along with the slippage of described semi girder is adjusted, until described semi girder slides onto the step of the desired location in main hull, described method also comprises:
Semi girder described in ground grading integral constructing around dock;
Build the semi girder obtained described in jacking, under described semi girder, lay slide rail, slide rail is laid and is extended to dock limit.
5. method according to claim 4, it is characterized in that, describedly make described semi girder to the main hull slippage of being fixed on dock, and adjust the center of gravity of carrying described main hull along with the slippage of described semi girder, until the step of desired location that described semi girder slides onto in main hull body comprises:
Determine the substep transfer weight of described semi girder according to the center of gravity of described semi girder, the substep transfer weight of described semi girder is multiple;
The slippage of semi girder to main hull is carried out respectively according to multiple substep transfer weight of described semi girder, and when described semi girder slippage reaches substep transfer weight to the weight of main hull, corresponding ballast water is discharged, until semi girder slides onto the desired location in described main hull according to the part moment of flexure of described substep transfer weight and setting.
6. method according to claim 1, is characterized in that, arranges Anti-collision fender between described main hull and dock wall.
7. method according to claim 3, other are characterised in that, described method also comprises:
When described semi girder is to described main hull slippage, finely tune the ballast water capacity of described main hull, to make flush with semi girder assembling stand top in main hull or be in preset height scope higher than the height at semi girder assembling stand top in described main hull bottom described semi girder bottom described semi girder.
8. method according to claim 4, is characterized in that, described semi girder carries out thrusting slip or traction slippage by the sliding control assembly arranged.
9. method according to claim 8, is characterized in that, described sliding control assembly comprises and is wound around the winch of described semi girder, the running block being installed on semi girder front end and the fixed pulley group be fixed in described main hull by twisted rope.
10. method according to claim 1, it is characterized in that, describedly make described semi girder to the main hull slippage of being fixed on dock, and carry the center of gravity of described main hull along with the slippage of described semi girder is adjusted, until described semi girder slides onto the step of the desired location in main hull, described method also comprises:
Slide onto the semi girder of desired location described in fixing in described main hull, and described main hull is hauled out described dock.
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| CN108008732A (en) * | 2017-11-28 | 2018-05-08 | 海洋石油工程（青岛）有限公司 | The method adjusted and carried is loaded onto ship for large structure trolley |
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| CN104805819B (en) | 2017-03-08 |
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