CN106337971B - A kind of buoyancy can be changed buoyancy tank and its application - Google Patents
A kind of buoyancy can be changed buoyancy tank and its application Download PDFInfo
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- CN106337971B CN106337971B CN201610882128.4A CN201610882128A CN106337971B CN 106337971 B CN106337971 B CN 106337971B CN 201610882128 A CN201610882128 A CN 201610882128A CN 106337971 B CN106337971 B CN 106337971B
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- 238000000034 method Methods 0.000 claims abstract description 27
- 238000007654 immersion Methods 0.000 claims abstract description 15
- 229910000831 Steel Inorganic materials 0.000 claims description 45
- 239000010959 steel Substances 0.000 claims description 45
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 30
- 238000003466 welding Methods 0.000 claims description 25
- 238000007667 floating Methods 0.000 claims description 13
- 230000009467 reduction Effects 0.000 claims description 5
- 238000005253 cladding Methods 0.000 claims description 3
- 230000005484 gravity Effects 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 3
- 230000003014 reinforcing effect Effects 0.000 claims description 3
- 238000009412 basement excavation Methods 0.000 claims description 2
- 230000003247 decreasing effect Effects 0.000 claims 1
- 238000010276 construction Methods 0.000 abstract description 9
- 230000008569 process Effects 0.000 description 9
- 238000011065 in-situ storage Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 208000020442 loss of weight Diseases 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L1/00—Laying or reclaiming pipes; Repairing or joining pipes on or under water
- F16L1/12—Laying or reclaiming pipes on or under water
- F16L1/20—Accessories therefor, e.g. floats, weights
- F16L1/24—Floats; Weights
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
- Underground Or Underwater Handling Of Building Materials (AREA)
Abstract
The present invention relates to a kind of buoyancy can be changed buoyancy tank and its application, and it includes: shell, exhaust valve, inlet valve which, which can be changed buoyancy tank, and is equipped with a main storehouse, two the first hydraulic pressure storehouses and two the second hydraulic pressure storehouses, adjusts buoyancy tank natural buoyancy by exhaust valve, inlet valve；It can be changed the splicing and sinking that buoyancy tank completes long-distance pipe using buoyancy.The present invention realizes the real-time controllable of buoyancy tank buoyancy size, and widely used, especially suitable for the construction of the pipeline in hydraulic engineering, using pipeline immersion method of the invention, work progress is simple, security performance is high, required ship is less, and adjustability is high, facilitates control.
Description
Technical field
The present invention relates to buoyancy tank and pipeline sinking technical fields more particularly to a kind of buoyancy can be changed buoyancy tank and its application.
Background technique
With the development of technology and the improvement of people ' s living standards, the more and more great rush of the construction of various favorable to the people engineerings
People's lives are facilitated into expanding economy.In the prior art, more river pipeline construction overall plan and process system design
Scheme will ensure that the control of the piling in work progress precision, underwater steel construction part installation accuracy, pipeline integral hoisting precision etc. are more
Require, the construction of the laying especially water-supply-pipe of major diameter long range of Ha Noi water-supply-pipe to consume a large amount of human and material resources,
Financial resources will meet the standard of zero tolerance in each process of construction.
In the prior art, the cross a river immersed tube of major diameter long range requires overall time sinking in sinking, in order to be formed
The steel pipe of whole water-supply-pipe, segmentation will be welded in land, then transport on river surface, and integral solder is long after completing to be compared
Long (several hundred rice even several kms) and its bad transport, will be transported, and be directed to the water-based item in inland river using more steamers
Part limitation, large-scale crane ship is marched into the arena difficulty, and the ships quantity required in integrated piping sinking is also more, water delivery pipe range
Degree is long, weight is big, the bad control of precision during integral hoisting, bad adjusting, integral construction difficulty, low efficiency, consuming
Time is longer.
Summary of the invention
In view of above-mentioned analysis, the present invention is intended to provide a kind of buoyancy can be changed buoyancy tank and its application, to solve buoyancy tank
The real-time control of buoyancy, and due to the water-based condition limitation in inland river, large-scale crane ship is marched into the arena, and difficult, required ship is more, long
The pipeline of distance whole welding difficulty waterborne is big, and the precision of plan-position and elevation requires high difficulty when integral hoisting is constructed
Topic.
The purpose of the present invention is mainly achieved through the following technical solutions:
A kind of variable buoyancy tank of buoyancy, it includes: shell, exhaust valve, inlet valve which, which can be changed buoyancy tank,；
The main body of shell is steel pipe, and the both ends of shell are that hemispherical head, cylindrical drum and hemispherical head are close by welding
Envelope connection；
Interior of shell is axially divided into five warehouses sealed to each other along shell by compartment steel plate: based on intermediate warehouse
Storehouse, two warehouses at both ends are the first hydraulic pressure storehouse, and remaining two warehouses are the second hydraulic pressure storehouse；
Interior of shell is equipped at least three reinforcing ring, and is arranged at the Along ent of shell；
Main storehouse is set there are two exhaust valve, each first hydraulic pressure storehouse and the second hydraulic pressure storehouse be equipped with an exhaust valve and one into
Water valve；
Buoyancy can be changed one group of buoyancy tank every two, be connected by three pairs of H profile steels；Each pair of H profile steel can be changed buoyancy tank in buoyancy respectively
The connection buoyancy of two sides up and down can be changed buoyancy tank, and be equipped with set square supporting bracket, it is floating for support and limit same group two
Power can be changed the relative position of buoyancy tank.
Set square supporting bracket is made of thick triangular steel plate, can be changed the side that buoyancy tank contacts with buoyancy and is equipped with steel cladding plate.
Buoyancy can be changed buoyancy tank diameter D=2m, set square supporting bracket with a thickness of 0.12m, the thickness of compartment steel plateThe length L that buoyancy can be changed buoyancy tank meets:
GAlways=GWeight+GCounterweight
(FIt is floating-GIt is floating)×N-GAlways>=[permissible value] × N
Wherein:
GWeightIt can be changed the total weight that buoyancy tank carries weight for buoyancy；
GCounterweightFor set square supporting bracket, the total weight of H profile steel；
GIt is floatingIt can be changed the total weight of buoyancy tank for each buoyancy；
GAlwaysIt can be changed the buoyancy tank total weight to be carried for buoyancy；
FIt is floatingFor the weight of the gravity object equal with the variable buoyancy of buoyancy tank of each buoyancy；
N is that the buoyancy used can be changed the number of buoyancy tank；
Permissible value is greater than or equal to 1 ton.
Buoyancy can be changed buoyancy tank by the respective inlet valve in the first hydraulic pressure storehouse and the second hydraulic pressure storehouse and exhaust valve, adjust the first water
Respectively internal water increases or reduces for pressure storehouse and the second hydraulic pressure storehouse, and then adjusts reduction or increasing that buoyancy can be changed the buoyancy of buoyancy tank
Greatly.
A kind of pipeline immersion method that can be changed buoyancy tank using the buoyancy, the step of the pipeline immersion method are as follows:
S1, underwater groove is excavated, builds job platform waterborne；
S2, the pipeline that short-range pipeline is welded into long range on riverbank；
S3, buoyancy tank and towboat be can be changed using buoyancy, the pipeline of long range is transported to job platform；
S4, the pipeline of multistage long range is spliced into a complete pipeline on job platform；
S5, it can be changed buoyancy tank by buoyancy whole pipeline be subjected to coordination sinking；
S6, job platform is removed, backfills groove.
Specific step is as follows by step S1:
S1.1, using dredger, hopper barge to needing the position of sinking pipeline to carry out the excavation of underwater groove in river；
S1.2, steel pipe is squeezed into river at groove under water, and job platform is built on the steel pipe, and in job platform
Upper installation auxiliary hoist and the pulley blocks being used together with auxiliary hoist；Welding chamber is set below job platform, and
It is connect with pulley blocks, allows auxiliary hoist that welding chamber is sling or be put down by pulley blocks.
Specific step is as follows by step S3:
S3.1, the group number and length that the variable buoyancy tank of buoyancy needed is determined according to the weight of the pipeline of long range；
S3.2, buoyancy be can be changed into buoyancy tank connection using H profile steel, and every two is one group；
S3.3, the pipeline of long range is placed in the H profile steel that buoyancy can be changed on the upside of buoyancy tank using crane ship, and keeps long
The pipeline of distance will not immerse the water surface；
S3.4, the pipeline of long range is pulled using towboat to below job platform, using crane ship by the pipeline of long range
It is placed in welding chamber, removing all buoyancy can be changed buoyancy tank, reuses auxiliary hoist and slings welding chamber to job platform.
The specific steps of step S5 are as follows:
S5.1, welding chamber is lowered into the water surface or more using auxiliary hoist, connecting all buoyancy can be changed buoyancy tank, and will weldering
Whole pipeline after connecing is placed in the centre that buoyancy can be changed each pair of H profile steel of buoyancy tank, i.e., each pair of H profile steel is from the upper side and lower side, simultaneously
It connects and fixes whole pipeline and buoyancy can be changed buoyancy tank；
S5.2, it can be changed at all buoyancy and sensor be installed on buoyancy tank, monitoring buoyancy can be changed liquid level and buoyancy in buoyancy tank
The submergence depth of variable buoyancy tank；
S5.3, the buoyancy of buoyancy tank can be changed by auxiliary hoist, and reduction buoyancy, guarantees that whole pipeline is not bent
In the case where, by whole pipeline submerged, until removing all buoyancy can be changed buoyancy tank, and adjust at the underwater groove dug
Its whole buoyancy, makes it emerge, and completes the sinking of pipeline.
The present invention has the beneficial effect that:
1, exhaust valve and inlet valve is arranged in each warehouse by the way that buoyancy tank is divided into multiple warehouses, and respectively in the present invention,
The buoyancy of buoyancy tank can simply be controlled.
2, method of the invention does not need to put into a large amount of large-scale crane ship, only needs riverbank tubulation place will be under lifting pipeline
Two, river large-scale crane ship is needing the position of sinking pipeline to weld two large-scale crane ships to pipeline assembly；
3, due to carrying out the welding and sinking of pipeline on the water surface in situ, contrast locating is more accurate, and the plan-position of pipeline is
Auxiliary lifting devices through being supported on platform are fixed, and what the sinking process of pipeline was done is only by pipeline by production elevation
Become the movement of design altitude by auxiliary hoist, lifting is very convenient, and precision is higher, can be readily implemented micro- up and down
It adjusts；
4, buoyancy be can be changed into the carrying platform waterborne that buoyancy tank splices as pipeline, passes through the flat of auxiliary hoist fixed -piping
Face position reaches the length that pipeline is spliced into design drawing requirement in situ on the water surface, and can prevent pipeline from soaking before welding
Enter in water, ensure that welding quality when pipeline splicing；
5, it in sinking pipeline, can be changed the relative position of buoyancy tank and pipeline by changing buoyancy, so that buoyancy is can be changed buoyancy tank and rise
To balanced action, the pipeline of long range when filling the water sinking, due in the injecting process water body in the duct can play, be easy to lead
Cause entire lifting or sinking system stress can disequilibrium and extremely difficult control, be that the most complicated and risk is most during entire sinking
Big process.The present invention can be changed buoyancy tank using buoyancy and keep after balancing, regardless of the water body left and right in the injecting process in pipeline
Play can be changed the automatic balance function of buoyancy tank by buoyancy, finally can pipeline be made to reach self-balancing, be effectively controlled sinking
The risk of process, reduces difficulty of construction；It is filled the water by can be changed in each warehouse of buoyancy tank in buoyancy, buoyancy can be changed buoyancy tank buoyancy and subtract
It is small, so that pipeline is slowly sunk, and play the role of loss of weight, the weight overwhelming majority of whole pipeline can be changed buoyancy tank by buoyancy and undertake, branch
Support platform and auxiliary lifting devices only undertake small part weight, increase stability, the safety of entire sinking system
Property and operability；
6, the present invention has invertibity, just in case breaking down during sinking, can be changed adding for buoyancy tank by buoyancy
Gas draining movement realize buoyancy can be changed buoyancy tank buoyancy change and easily by Pipeline lift to the water surface.
Other features and advantages of the present invention will illustrate in the following description, also, partial feature and advantage from
It is become apparent in specification, or understand through the implementation of the invention.The objectives and other advantages of the invention can by
Specifically noted structure is achieved and obtained in written specification, claims and attached drawing.
Detailed description of the invention
Attached drawing is only used for showing the purpose of specific embodiment, and is not to be construed as limiting the invention, in entire attached drawing
In, identical reference symbol indicates identical component.
Fig. 1 is the schematic diagram that a kind of buoyancy can be changed buoyancy tank.
Fig. 2 is schematic diagram when a kind of variable buoyancy tank of buoyancy uses in groups.
Fig. 3 is a kind of schematic diagram for the application that buoyancy can be changed buoyancy tank.
Fig. 4 is that can be changed in a kind of pipeline immersion method of buoyancy tank to weld the variable buoyancy tank of preceding buoyancy and pipeline using a kind of buoyancy
Position view.
Fig. 5 is that buoyancy can be changed buoyancy tank and pipeline after welding in a kind of pipeline immersion method using a kind of variable buoyancy tank of buoyancy
Position view.
In figure: 1. shells, 2. exhaust valves, 3. inlet valves, 4. main storehouses, 5. second hydraulic pressure storehouses, 6. first hydraulic pressure storehouses, 7. buoyancy
Variable buoyancy tank, 8.H fashioned iron, 9. set square supporting brackets, 10. pulley blocks, 11. auxiliary hoists, 12. pipelines, 13. job platforms.
Specific embodiment
Specifically describing the preferred embodiment of the present invention with reference to the accompanying drawing, wherein attached drawing constitutes the application a part, and
Together with embodiments of the present invention for illustrating the principle of the present invention.
A kind of variable buoyancy tank of buoyancy, it includes: shell 1, exhaust valve 2, inlet valve 3 which, which can be changed buoyancy tank,；
The main body of shell 1 is steel pipe, and the both ends of shell 1 are hemispherical head, and cylindrical drum and hemispherical head pass through welding
It is tightly connected；
Be divided into five warehouses sealed to each other along shell 1 is axial by compartment steel plate inside shell 1: intermediate warehouse is
Main storehouse 4, two warehouses at both ends are the second hydraulic pressure storehouse 6, and remaining two warehouses are the second hydraulic pressure storehouse 5；
It is equipped at least three reinforcing ring inside shell 1, and is arranged at the Along ent of shell 1；
Main storehouse 4 is set there are two exhaust valve 2, and each second hydraulic pressure storehouse 6 and the second hydraulic pressure storehouse 5 are equipped with 2 He of exhaust valve
One inlet valve 3；
Buoyancy can be changed one group of 7 every two of buoyancy tank, be connected by three pairs of H profile steels 8；Each pair of H profile steel 8 is variable floating in buoyancy respectively
The connection buoyancy of two sides up and down of case 7 can be changed buoyancy tank 7, and be equipped with set square supporting bracket 9, for supporting and limiting the two of same group
A buoyancy can be changed the relative position of buoyancy tank 7.
Set square supporting bracket 9 is made of thick triangular steel plate, can be changed the side that buoyancy tank 7 contacts with buoyancy and is equipped with steel cladding plate.
Buoyancy can be changed buoyancy tank 7 diameter D=2m, set square supporting bracket 9 with a thickness of 0.12m, the thickness of compartment steel plateThe length L that buoyancy can be changed buoyancy tank 7 meets:
GAlways=GWeight+GCounterweight
(FIt is floating-GIt is floating)×N-GAlways>=[permissible value] × N
Wherein:
GWeightIt can be changed the total weight that buoyancy tank 7 carries weight for buoyancy；
GCounterweightFor set square supporting bracket 8, the total weight of H profile steel 8；
GIt is floatingIt can be changed the total weight of buoyancy tank 7 for each buoyancy；
GAlwaysIt can be changed the total weight to be carried of buoyancy tank 7 for buoyancy；
FIt is floatingFor the weight of the gravity object equal with the variable buoyancy of buoyancy tank 7 of each buoyancy；
N is that the buoyancy used can be changed the number of buoyancy tank 7；
Permissible value is greater than or equal to 1 ton.
In the present embodiment, permissible value is set as 1 ton, and the weight of the pipeline 12 for the long range to be carried is 236.2 tons, set square
The weight of the accessories such as supporting bracket 9 is 19.2 tons, and buoyancy can be obtained by, which being computed, can be changed the length of buoyancy tank 7 as 13.12m.
Buoyancy can be changed buoyancy tank by the second hydraulic pressure storehouse 6 and the respective inlet valve 3 in the second hydraulic pressure storehouse 5 and exhaust valve 2, adjustment the
The respective internal water in two hydraulic pressure storehouses 6 and the second hydraulic pressure storehouse 5 increases or reduces, and then adjusts the reduction that buoyancy can be changed the buoyancy of buoyancy tank
Or increase.
A kind of pipeline immersion method that can be changed buoyancy tank using the buoyancy, the step of the pipeline immersion method are as follows:
S1, underwater groove is excavated, builds job platform 13 waterborne；
S2, the pipeline 12 that short-range pipeline 12 is welded into long range on riverbank；
S3, buoyancy tank 7 and towboat be can be changed using buoyancy, the pipeline 12 of long range is transported to job platform 13；
S4, the pipeline 12 of multistage long range is spliced into a complete pipeline 12 on job platform 13；
S5, it can be changed buoyancy tank 7 by buoyancy whole pipeline 12 be subjected to coordination sinking；
S6, job platform 13 is removed, backfills groove.
Specific step is as follows by step S1:
S1.1, using dredger, hopper barge to needing the position of sinking pipeline 12 to carry out the digging of underwater groove in river
Pick；
S1.2, steel pipe is squeezed into river at groove under water, and job platform 13 is built on the steel pipe, and in operation horizontal
The pulley blocks 10 installing auxiliary hoist 11 on platform 13 and being used together with auxiliary hoist 11；It is arranged below job platform 13
Welding chamber, and connect with pulley blocks 10, allow auxiliary hoist 11 that welding chamber is sling or be put down by pulley blocks 10.
Specific step is as follows by step S3:
S3.1, the group number and length that the variable buoyancy tank 7 of buoyancy needed is determined according to the weight of the pipeline 12 of long range；
S3.2, it buoyancy be can be changed into buoyancy tank 7 using H profile steel 8 connects, and every two is one group；
S3.3, the pipeline 12 of long range is placed in the H profile steel 8 that buoyancy can be changed on the upside of buoyancy tank 7 using crane ship, and protected
The pipeline 12 for holding long range will not immerse the water surface；
S3.4, the pipeline 12 of long range is pulled using towboat to the lower section of job platform 13, using crane ship by long range
Pipeline 12 is placed in welding chamber, and removing all buoyancy can be changed buoyancy tank 7, is reused auxiliary hoist 11 and is sling welding chamber to operation
Platform 13.
The specific steps of step S5 are as follows:
S5.1, welding chamber is lowered into the water surface or more using auxiliary hoist 11, connecting all buoyancy can be changed buoyancy tank 7, and
Whole pipeline 12 after welding is placed in the centre that buoyancy can be changed each pair of H profile steel 8 of buoyancy tank 7, i.e., each pair of H profile steel 8 from upside and
Downside, while connecting and fixing whole pipeline 12 and the variable buoyancy tank 7 of buoyancy；
S5.2, it can be changed at all buoyancy and sensor be installed on buoyancy tank, monitoring buoyancy can be changed liquid level and buoyancy in buoyancy tank
The submergence depth of variable buoyancy tank；
S5.3, the buoyancy of buoyancy tank can be changed by auxiliary hoist 11, and reduction buoyancy, guarantees that whole pipeline 12 does not occur
In the case where bending, by whole 12 submerged of pipeline, until it is variable floating to remove all buoyancy at the underwater groove dug
Case, and its buoyancy is adjusted, so that it is emerged, completes the sinking of pipeline 12.
In conclusion the embodiment of the invention provides a kind of variable buoyancy tanks of buoyancy and its application, method of the invention to be not required to
Put into a large amount of large-scale crane ship；Due to carrying out the welding and sinking of water-supply-pipe on the water surface in situ, contrast locating is more accurate, pipe
The plan-position in road has been supported the auxiliary lifting devices on platform and has been fixed, and what the sinking process of pipeline was done only will
Pipeline is become the movement of design altitude from production elevation by auxiliary lifting devices, and the lifting of elevation is completely by assisting up and down
Control is set in refitting, and lifting is very convenient, and precision is higher, can be readily implemented fine tuning up and down；Splice the stage in pipeline, buoyancy can
Becoming floating box device can be used as the carrying platform waterborne of pipeline splicing, by the plan-position of auxiliary lifting devices fixed -piping,
Reach the length that pipeline is spliced into design drawing requirement in situ on the water surface；The stage is filled the water in pipeline, it can by changing buoyancy
The relative position for becoming buoyancy tank and pipeline makes buoyancy can be changed buoyancy tank and plays balanced action, is effectively controlled the risk of sinking process,
Reduce difficulty of construction；In the pipeline commissioning stage, by filling the water in the cabin that buoyancy can be changed buoyancy tank, buoyancy, which can be changed buoyancy tank and play, to be subtracted
Recast is used, and stability, safety and the operability of entire sinking system are increased；System of the invention is mainly by support platform
Constituted with the auxiliary lifting devices that are mounted in support platform, the lifting power which provides be it is controllable, pacify in this system
Equipped with instrumentation mechanism, instrumentation mechanism is by the real-time data transmission monitored to command centre, and it is hereby ensured that per pass system lists
The lifting power and real-time elevation of member are completely controllable in real time, are the synchronism between the safety and Ge Dao system unit of pipeline sinking
Provide good guarantee；The stroke of system of the invention freely can be changed, and operation is also very simple；The present invention has invertibity,
Just in case breaking down during sinking, the aerating draining movement that can be changed buoyancy tank by buoyancy realizes that buoyancy can be changed buoyancy tank and float
The change of power and easily by Pipeline lift to the water surface.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
In the technical scope disclosed by the present invention, any changes or substitutions that can be easily thought of by anyone skilled in the art,
It should be covered by the protection scope of the present invention.
Claims (7)
1. a kind of pipeline immersion method, which is characterized in that the step of the pipeline immersion method are as follows:
S1, underwater groove is excavated, builds job platform waterborne；
S2, the pipeline that short-range pipeline is welded into long range on riverbank；
S3, buoyancy tank and towboat be can be changed using buoyancy, the pipeline of long range is transported to job platform；
S3.1, the group number and length that the variable buoyancy tank of buoyancy needed is determined according to the weight of the pipeline of long range；
S3.2, the buoyancy be can be changed into buoyancy tank connection using H profile steel, and every two is one group；
S3.3, the pipeline of long range is placed in the H profile steel that the buoyancy can be changed on the upside of buoyancy tank using crane ship, and keeps long
The pipeline of distance will not immerse the water surface；
S3.4, it is pulled below pipeline to the job platform of long range using towboat, is placed in the pipeline of long range using crane ship
In welding chamber, removing all buoyancy can be changed buoyancy tank, reuses auxiliary hoist and slings welding chamber to job platform；
S4, the pipeline of multistage long range is spliced into a complete pipeline on job platform；
S5, it can be changed buoyancy tank by buoyancy whole pipeline be subjected to coordination sinking；
S6, job platform is removed, backfills groove；
It includes: shell, exhaust valve, inlet valve that the buoyancy, which can be changed buoyancy tank,；
The main body of the shell is steel pipe, and the both ends of the shell are hemispherical head, the cylindrical drum and hemispherical that steel pipe is formed
End socket is connected by welded seal；
The interior of shell is axially divided into five warehouses sealed to each other along shell by compartment steel plate: based on intermediate warehouse
Storehouse, two warehouses at both ends are the first hydraulic pressure storehouse, and remaining two warehouses are the second hydraulic pressure storehouse；
The interior of shell is equipped at least three reinforcing ring, and is arranged at the Along ent of the shell；
The main storehouse is set there are two exhaust valve, and each first hydraulic pressure storehouse and the second hydraulic pressure storehouse are equipped with an exhaust valve and one
A inlet valve.
2. pipeline immersion method according to claim 1, which is characterized in that the buoyancy can be changed one group of buoyancy tank every two,
It is connected by three pairs of H profile steels；Each pair of H profile steel connects the buoyancy in the two sides up and down that the buoyancy can be changed buoyancy tank respectively can
Become buoyancy tank, and be equipped with set square supporting bracket, two buoyancy for supporting and limiting same group can be changed the relative position of buoyancy tank.
3. pipeline immersion method according to claim 2, which is characterized in that the set square supporting bracket is thick triangular steel plate
It is made, can be changed the side that buoyancy tank contacts with the buoyancy and be equipped with steel cladding plate.
4. pipeline immersion method according to claim 3, which is characterized in that the buoyancy can be changed the diameter D=2m of buoyancy tank,
The set square supporting bracket with a thickness of 0.12m, the thickness of the compartment steel plateThe buoyancy can be changed the length of buoyancy tank
L is spent to meet:
GAlways=GWeight+GCounterweight
(FIt is floating-GIt is floating)×N-GAlways>=[permissible value] × N
Wherein:
GWeightIt can be changed the total weight that buoyancy tank carries weight for the buoyancy；
GCounterweightFor the set square supporting bracket, the total weight of H profile steel；
GIt is floatingIt can be changed the total weight of buoyancy tank for each buoyancy；
GAlwaysIt can be changed the buoyancy tank total weight to be carried for the buoyancy；
FIt is floatingFor the weight of the gravity object equal with the variable buoyancy of buoyancy tank of each buoyancy；
N is that the buoyancy used can be changed the number of buoyancy tank；
The permissible value is greater than or equal to 1 ton.
5. pipeline immersion method according to claim 1, which is characterized in that the buoyancy can be changed buoyancy tank and pass through described first
It is respectively internal to adjust first hydraulic pressure storehouse and the second hydraulic pressure storehouse for the respective inlet valve in hydraulic pressure storehouse and the second hydraulic pressure storehouse and exhaust valve
Water increases or reduces, and then adjusts buoyancy and can be changed the buoyancy of buoyancy tank and be decreased or increased.
6. pipeline immersion method according to claim 1, which is characterized in that specific step is as follows by the step S1:
S1.1, using dredger, hopper barge to needing the position of sinking pipeline to carry out the excavation of underwater groove in river；
S1.2, steel pipe is squeezed into river at groove under water, and job platform is built on the steel pipe, and pacify on job platform
Dress auxiliary hoist and the pulley blocks being used together with auxiliary hoist；Welding chamber is set below job platform, and with cunning
The connection of wheel group, allows auxiliary hoist that welding chamber is sling or be put down by pulley blocks.
7. pipeline immersion method according to claim 1, which is characterized in that the specific steps of the step S5 are as follows:
S5.1, welding chamber is lowered into the water surface or more using auxiliary hoist, connecting all buoyancy can be changed buoyancy tank, and will be after welding
Whole pipeline be placed in the centre that buoyancy can be changed each pair of H profile steel of buoyancy tank, i.e., each pair of H profile steel connects simultaneously from the upper side and lower side
And fixed whole pipeline and buoyancy can be changed buoyancy tank；
S5.2, it can be changed at all buoyancy and sensor be installed on buoyancy tank, the liquid level and buoyancy in the variable buoyancy tank of monitoring buoyancy are variable
The submergence depth of buoyancy tank；
S5.3, the buoyancy of buoyancy tank can be changed by auxiliary hoist, and reduction buoyancy, guarantees the feelings that whole pipeline is not bent
Under condition, by whole pipeline submerged, until removing all buoyancy can be changed buoyancy tank, and adjust it at the underwater groove dug
Buoyancy makes it emerge, and completes the sinking of pipeline.
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| CN110644534B (en) * | 2019-10-25 | 2024-07-09 | 鲁东大学 | Buoyancy-variable suspension tunnel |
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| CN113915409B (en) * | 2021-09-20 | 2022-12-02 | 山西二建集团有限公司 | Pipeline lifting control device |
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