Ultra-large type offshore platform upper chunk circulation synchronous hydraulic promotes technology
Technical field
The present invention relates to a kind of lifting technology of large structure, relate in particular to ultra-large type offshore platform upper chunk circulation synchronous hydraulic and promote technology, belong to the ocean engineering field.
Background technology
The exploitation of marine oil and gas resource need be arranged the offshore platform of some at sea.Offshore platform mainly contains two types: fixed platform, floating platform.
The offshore oil fixed platform generally comprises: upper chunk and fixed support structure under water.This type of offshore platform generally be with upper chunk and under water fixed support structure build separately on land, and adopt floating holder method to carry out marine installation exercise.In the shipping process of large-scale upper chunk, need between its underpart and ship deck, arrange the lower support structure usually.For floating platform, it generally is made up of upper chunk and bottom buoyancy aid, before Qi Xiashui, usually needs in the place or dock is finished the group of its upper chunk and bottom buoyancy aid to work.
For the construction of offshore platform, traditional handicraft generally is that earlier substructure is prefabricated finishes with lower support structure, bottom buoyancy aid etc., then, proceeds the construction of upper chunk again.In the building course, need usually to adopt loop wheel machine to finish lifting operation.Along with continuous the striding forward to the deep water field of marine petroleum development, the volume and weight of offshore platform is also in continuous increase, when adopting existing technology to carry out the construction of ultra-large type offshore platform upper chunk, can make it in whole building course, be in the higher position always, mainly have the following disadvantages:
1, increases construction plant loop wheel machine use amount and loop wheel machine task difficulty, particularly needed to increase the access times of large-scale loop wheel machine;
2, overall dimension and the precision control difficulty of upper chunk have been increased;
3, increased construction plant scaffold building workload;
4, increased the consumption of the interim supporting member in the upper chunk building course;
5, the construction of upper chunk need be treated can carry out after substructure is finished, and is unfavorable for the control of duration.
The content of invention
Main purpose of the present invention is to overcome the above-mentioned shortcoming that existing technology exists, and providing a kind of ultra-large type offshore platform upper chunk circulation synchronous hydraulic to promote technology, it can with ultra-large type offshore platform upper chunk and its underpart structure be separated and place lower position prefabricated separately; Reduced monomer lifting operation workload and monomer hoisting height during ultra-large type offshore platform upper chunk is built effectively, reduced the place resources such as loop wheel machine of building the place and be equipped with requirement; Simultaneously, adopt hydraulic rockshaft to promote operation, can realize the effective control to hoisting velocity, displacement accuracy; And adopt the remote central control system to control promoting operation process, can realize that the multiple spot of upper chunk promotes synchronously.
The objective of the invention is to be realized by following technical scheme:
A kind of ultra-large type offshore platform upper chunk circulation synchronous hydraulic promotes technology, it is characterized in that: following steps are adopted in the lifting of upper chunk and the installation of substructure:
The first step is arranged the installation lifting appliance and is promoted bracing or strutting arrangement at each supporting leg place of upper chunk;
Second step rose to setting place of upper chunk supporting leg with lifting appliance, and clamped the supporting leg of upper chunk;
The 3rd step: the control lifting appliance applies lifting force, and corresponding upper chunk supporting leg is promoted a setting height stroke;
The 4th step: will support pipeline section temporarily and place on the temporary support of bottom, the readjustment lifting appliance docks the upper chunk supporting leg to setting height with the interim pipeline section that supports;
The 5th step: the lifting appliance unloading is reduced to the bottom of interim support pipeline section with the lifting appliance height, and clamps the interim pipeline section that supports;
The 6th step: lifting appliance continues to promote a setting height stroke with the upper chunk supporting leg;
The 7th step: repeat above-mentioned the 4th step to the 6th step, upper chunk is carried out the circularly enhancing operation, upper chunk is risen to predetermined altitude;
The 8th step: substructure is transported to precalculated position, upper chunk bottom;
The 9th step: turn down lifting appliance, upper chunk is docked with substructure;
The tenth step: the lifting appliance unloading, remove lifting appliance and promote bracing or strutting arrangement.
Described upper chunk and its underpart structure are separated and are placed lower position prefabricated separately, during construction, arrange several interim supports in the bottom of upper chunk.
Described lifting appliance comprises: hydraulic rockshaft, lift frame and hydraulic clamp, hydraulic rockshaft are installed in and promote on the bracing or strutting arrangement, and are connected with lift frame, pumping plant and remote central control device, and hydraulic clamp is installed on the lift frame; Hydraulic rockshaft is to carry out synchronization job by the remote central control device by hydraulic power unit control, when promoting operation, hydraulic rockshaft rises to lift frame setting place of upper chunk supporting leg, and make lift frame clamp the supporting leg of upper chunk by hydraulic clamp, the upper chunk supporting leg is promoted a setting height stroke; Then, by adjusting back, the upper chunk supporting leg being promoted after pipeline section docks with interim the support again, the multiple spot of realization upper chunk circulates and promotes synchronously.
Described remote central control device is computer.
Described lifting bracing or strutting arrangement is the frame type braced structures, is connected with the reinforcement diagonal brace on the frame type braced structures.
Beneficial effect of the present invention:
1, can be with ultra-large type offshore platform upper chunk and its underpart structure separately and place lower position prefabricated separately, reduced monomer lifting operation workload and monomer hoisting height during ultra-large type offshore platform upper chunk is built effectively, reduced the place resources such as loop wheel machine of building the place and be equipped with requirement.
2, adopt hydraulic rockshaft to promote operation, can realize the effective control to hoisting velocity, displacement accuracy;
3, adopt the remote central control system to control promoting operation process, can realize that the multiple spot of upper chunk promotes synchronously;
4, be primarily aimed at the original design supporting leg of upper chunk and promote operation, need not that chunk is promoted operating mode and carry out extra intensity, rigidity check;
5, its support system height that adopts is less, and the stability of whole lifting process is convenient to control;
6, weight and the scale error to ultra-large type offshore platform upper chunk control effectively.
7, country is carried out the deep water hydrocarbon development of resources important technology support is provided; And, have important reference meanings for the construction of the large structure of other types.
Description of drawings:
Fig. 1 arranges schematic diagram for lifting appliance of the present invention.
Fig. 2 is the local enlarged diagram of supporting leg of the present invention.
Fig. 3 be among Fig. 2 A-A to schematic diagram.
Fig. 4 be among Fig. 3 B-B to schematic diagram.
Fig. 5 be among Fig. 2 C-C to schematic diagram.
Fig. 6 be among Fig. 2 D-D to schematic diagram.
Fig. 7 clamps chunk supporting leg schematic diagram for lift frame of the present invention.
Fig. 8 promotes first height stroke schematic diagram of upper chunk supporting leg for the present invention.
Fig. 9 is first height stroke general illustration of the present invention.
Figure 10 supports pipeline section schematic diagram in place for the present invention temporarily.
Figure 11 is supporting leg of the present invention and the interim pipeline section connection diagram that supports.
Figure 12 is the interim pipeline section schematic diagram that supports for lift frame of the present invention clamps.
Figure 13 is a height of interim support pipeline section stroke schematic diagram for the present invention promotes.
Figure 14 promotes second height of upper chunk stroke general illustration for the present invention.
Figure 15 promotes upper chunk to the predetermined altitude general illustration for the present invention.
Figure 16 transports substructure to chunk bottom schematic diagram for the present invention.
Figure 17 is upper chunk of the present invention and its underpart structure scheme of installation.
Figure 18 promotes and installs the completion schematic diagram for upper chunk of the present invention.
Major label description in figure:
1 support temporarily, 2 promotes bracing or strutting arrangements, 3 and strengthens diagonal braces, 4 hydraulic rockshafts, 5 steel strand, 6 lift frames, 7 hydraulic clamps, 8 bottom temporary supports, 9 interim pipeline sections, 10 substructures, 11 upper chunk of supporting.
The specific embodiment
As Fig. 1, Figure 16, Figure 17, shown in Figure 180, upper chunk 11 of the present invention and its underpart structure 10 are separated and are placed lower position prefabricated separately.As shown in Figure 1, when upper chunk 11 is built, several interim supports 1 are arranged in the bottom of upper chunk 11, has the certain altitude space to guarantee upper chunk 11 and to build between the ground, place, make upper chunk 11 after construction is finished, promote bracing or strutting arrangement 2 and lifting appliance and can enter the bottom of upper chunk 11 smoothly.
Following steps are adopted in the installation of upper chunk 11 and its underpart structure 10:
The first step as Fig. 2-shown in Figure 6, is 1. arranged lifting appliances, is promoted bracing or strutting arrangement 2 and bottom temporary support 8 at upper chunk 11 each supporting leg place; 2. lifting appliance comprises: hydraulic rockshaft 4, lift frame 6 and hydraulic clamp 7, hydraulic rockshaft 4 is installed on the lifting bracing or strutting arrangement 2, and hydraulic clamp 7 is installed on the lift frame 6; The steel strand 5 of hydraulic rockshaft 4 are connected with lift frame 6, and simultaneously, hydraulic rockshaft 4 is connected with pumping plant and remote central control device; 3. finish the debugging work of whole hydraulic control device.
Above-mentioned lifting bracing or strutting arrangement 2 is the frame type braced structures, is connected with on the frame type braced structures to strengthen diagonal brace 3; The remote central control device is computer.
Second step: as shown in Figure 7, by hydraulic rockshaft 4 lift frame 6 is risen to setting place of supporting leg bottom, by the hydraulic clamp 7 on the lift frame 6, make lift frame 6 clamp the supporting leg of upper chunk 11.
The 3rd step: as Fig. 8, shown in Figure 9, send the lifting job command by the remote central control device, hydraulic rockshaft 4 transmits pulling force by steel strand 5, lift frame 6 is applied lifting force, corresponding upper chunk supporting leg is promoted a height stroke, and this hoisting depth stroke is greater than hydraulic rockshaft 4 self stroke, hydraulic rockshaft 4 has continuous lifting work capacity, so for single height stroke, can realize promoting continuously operation.In this process, central control unit is controlled the fuel delivery of each hydraulic rockshaft 4 by hydraulic power unit, can realize the synchronization job of all hydraulic lifter 4, thereby speed and the precision of whole lifting operation control effectively.Simultaneously, realize the multiple spot circulation lifting synchronously of upper chunk 11.
The 4th step: as Figure 10, shown in Figure 11, on-the-spot haulage devices such as employing fork truck will support pipeline section 9 temporarily and place on the temporary support 8 of bottom, and fuel delivery readjustment lift frame 6 certain altitudes of control pumping plant make the upper chunk supporting leg dock with interim support pipeline section 9.Then, carry out upper chunk supporting leg and the interim work that is connected of supporting pipeline section 9.
The 5th step: as shown in figure 12, hydraulic rockshaft 4 unloadings highly are reduced to the bottom of interim support pipeline section 9 with lift frame 6, and the hydraulic clamp of regulating on the lift frame 67 makes lift frame 6 clamp the interim pipeline section 9 that supports.
The 6th step: shown in Figure 13,14, by hydraulic rockshaft 4 upper chunk 11 is promoted a height stroke.
The 7th step: as shown in figure 15, repeat above-mentioned the 4th step to the 6th step, upper chunk 11 is carried out the circularly enhancing operation, thereby upper chunk 11 is risen to predetermined altitude.In this process, each hydraulic rockshaft 4 is by central control unit the hoisting velocity of upper chunk to be controlled, and promotes synchronously with the multiple spot circulation that realizes upper chunk 11.
The 8th step: as shown in figure 16, substructure 10 is transported to the precalculated position, and ready work.
The 9th step: as shown in figure 17, turn down lift frame 6 by the fuel delivery of control hydraulic rockshaft 4, thereby make upper chunk 11 dock with substructure 10, and the group of finishing upper chunk 11 and substructure 10 is to working.
The tenth step: as shown in figure 18, hydraulic rockshaft 4 unloadings promote operation and finish, and remove and promote operation device therefor and support.
Hydraulic rockshaft, lift frame, hydraulic clamp, computer are existing product.
The above, it only is preferred embodiment of the present invention, be not that the present invention is done any pro forma restriction, every foundation technical spirit of the present invention all still belongs in the scope of technical solution of the present invention any simple modification, equivalent variations and modification that above embodiment does.