CN108086358A - Heavy caliber long range multitube is the same as ditch Immersed tunnel method - Google Patents
Heavy caliber long range multitube is the same as ditch Immersed tunnel method Download PDFInfo
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- CN108086358A CN108086358A CN201711330230.4A CN201711330230A CN108086358A CN 108086358 A CN108086358 A CN 108086358A CN 201711330230 A CN201711330230 A CN 201711330230A CN 108086358 A CN108086358 A CN 108086358A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/063—Tunnels submerged into, or built in, open water
- E02D29/073—Tunnels or shuttering therefor assembled from sections individually sunk onto, or laid on, the water-bed, e.g. in a preformed trench
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- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
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- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Pipeline Systems (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The invention discloses a kind of heavy caliber long range multitubes with ditch Immersed tunnel method, and during pipe canal digging, individual layer cutting depth is less than pipeline maximum flying height；Under immersed tube during ditch operation, the pipeline after welding is slowly sunk to bottom of trench using the dead weight and elasticity of pipeline, invests pipe trench bottom, pipeline is made to reach the design depth of burying by pipeline under the action of gravity.Present invention efficiently solves the problems in the regional pipe canal digging such as the network of rivers, marsh, wetland and descending pipelines into ditch.
Description
Technical field
The present invention relates to a kind of construction methods, specifically, are related to a kind of heavy caliber long range multitube with ditch Immersed tunnel side
Method.
Background technology
In long range oil and gas pipeline engineering construction, pipe canal digging and lower ditch are very important working procedure, relation
It can reach design requirement to buried depth of pipeline, and affect the operational safety after in-pipe inspection robot.
In the network of rivers, marsh, wetland when area carries out heavy caliber Construction of Long-distance Pipelines, due to by earth's surface low bearing capacity, pipe
The influence for the factors such as ditch easily caves in, is difficult to be molded, carries out descending pipelines into ditch operation using conventional method and faces great difficulty.It is special
It is not when pipe trench is by way of paddy field, mire, marsh landforms, since river embankment, the network of rivers are gathered, irrigation canals and ditches are crisscross, and earth's surface is accumulated throughout the year
Water, level of ground water is high, and operation belt surface is muddy, and large scale equipment walking and lifting operation are difficult.During lower ditch, crane, sideboom tractor are certainly
Again plus the weight for hanging steel pipe, ground bearing pressure is difficult to meet ditch job requirements under normal pipeline.
The content of the invention
Technical problem solved by the invention is to provide a kind of heavy caliber long range multitube with ditch Immersed tunnel method, effectively
Ground is solved the problems, such as in the regional pipe canal digging such as the network of rivers, marsh, wetland and descending pipelines into ditch.
Technical solution is as follows：
A kind of heavy caliber long range multitube is with ditch Immersed tunnel method, and during pipe canal digging, individual layer cutting depth is less than pipeline
Maximum flying height；Under immersed tube during ditch operation, pipeline, will be after welding using the dead weight of pipeline and elasticity under the action of gravity
Pipeline slowly sink to bottom of trench, invest pipe trench bottom, pipeline made to reach the design depth of burying.
Further, under pipe canal digging and immersed tube before ditch, according to construction drawing, projected depth, elevation are labeled in pipeline
On；Before pipe canal digging, welding and the anticorrosive construction of pipeline cathode protection wiring are carried out by design position, and reserves sufficient length
Cable；Pipe end is blocked using steel plate, full weld, and outside is sealed with shrinkage band；More pipelines are swung into precalculated position, with tying up
Band fixes more pipelines simultaneously；Pipe canal digging, individual layer cutting depth are less than pipeline maximum flying height.
Further：The maximal bending moment that pipeline allows：Mmax≤[σ]/X1, in formula：X1For constant, [σ] is tubing allowable stress；
By formula Mmax=L2X2Draw individual layer maximum cutting depth L, pipeline maximum flying height H=L4X3, X2、X3Respectively constant.
Further：It, should be in pipe trench end excavated slope changeover portion to prevent pipeline stress is excessive from deforming.
Further：Under immersed tube rubber slab is wound in pipeline external anti-corrosion layer during ditch.
Further：Step before pipe canal digging includes preparation of construction, surveying setting-out, the build of operation band, transport stringing, pipeline
The step of welding, non-destructive testing, corrosion-resistanting interpolating port mend wound and pipeline backfill and land restoration.
Further：During surveying setting-out, repetition measurement is carried out to each corner pile with position indicator, releases pipe trench center line, operation band
And land for roads boundary line of marching into the arena；When transporting stringing, in tube wall away from pipe trench center line one side stringing, bilateral sinks in unilateral immersed tube location
Pipe location is by the direct cloth of pipeline on pipe trench center line；Under immersed tube before ditch, electric spark leak detection is carried out to erosion resistant coating, to what is checked
Dew point carries out anti-corrosion and mends wound in time, after rechecking qualification, carries out ditch operation under immersed tube.
Compared with prior art, the technology of the present invention effect includes：
1st, present invention efficiently solves the problem in the regional pipe canal digging such as the network of rivers, marsh, wetland and descending pipelines into ditch, sink
Method is simple for pipe construction, compared with conventional construction method is in similar area construction, relatively reduces heavy construction equipment
Quantity and scene resettlement number, working security is high, reduces construction cost, improves construction benefit.
2nd, the present invention has the characteristics that compared with ditch construction method under conventional pipelines：
(1) construction technology is simple and practical, with strong points, easy to operation；
(2) reduce the input of working sources, reduce construction cost；
(3) construction period is effectively shortened；
(4) quality is guaranteed, and security performance is high, reduces construction risk.
3rd, using this method, have many advantages, such as that construction technology is simple, construction quality and safe can be better ensured that, at this
Class area is that ditch can not be compared under conventional construction method using Immersed tunnel method.This engineering method equipment investment amount is few, construction party
Method is simple and easy to do, saves operating expenses, achieves good economic benefit, be heavy caliber multi-pipeline laying in one ditch from now in class
As area's construction provide references, while to desert area descending pipelines into ditch similarly with popularizing application prospect.
Description of the drawings
Fig. 1 is the construction schematic diagram of unilateral immersed tube in the present invention；
Fig. 2 is the construction schematic diagram of bilateral immersed tube in the present invention.
Specific embodiment
It elaborates below with reference to example embodiment to technical solution of the present invention.However, example embodiment can
Implement in a variety of forms, and be not understood as limited to embodiment set forth herein；On the contrary, it theses embodiments are provided so that
The design of example embodiment more comprehensively and completely, and is comprehensively communicated to those skilled in the art by the present invention.
The present invention is suitable for the features as poor geologic condition such as the heavy caliber long distance pipeline network of rivers, marsh, wetland, level of ground water height, earth's surface
Low bearing capacity, pipe trench difficult forming, common swing pipe equipment are difficult to the Special section construction of normally lower ditch operation.
Heavy caliber long range multitube is as follows with ditch Immersed tunnel method：
Step 1：Preparation of construction；
The underground structure situation of job location is understood in detail, and original to drawing and newfound underground structure is adjusted
It looks into, survey, clear and definite position.Prepare the materials such as steel pipe framed bent, steel plate, culvert pipe, for soft geological section strengthening construction sidewalk and guarantee
Irrigation canals and ditches are unimpeded.Prepare anti-corrosion benefit and hinder material and the woven bag for pipeline ballast, load sand pocket in advance, be placed in operation belt edge not
Influence the position of construction.
Step 2：Surveying setting-out；
Repetition measurement is carried out to each corner pile with GPS, releases pipe trench center line, operation band and land for roads boundary line of marching into the arena.
Eye-catching warning mark is set at underground obstacle, to ensure the safety of underground obstacle in constructing.
Step 3：Operation band is built；
Since level of ground water is high and belongs to seawater property, soil improvement is very difficult, and earth's surface plantation soil need to be removed to place and made
The measure of covering simultaneously is taken in industry band one side, realizes raw mellow soil separation.By irrigation canals and ditches when, using added water culvert pipe or set up pipe row
Method ensures that water system is unimpeded, and meets construction equipment and pass through needs.
Step 4：Transport and stringing；
In tube wall after pipe trench center line one side stringing, raw mellow soil separation, pipeline is moved on on pipe trench center line.It is unilateral
Immersed tube location, in tube wall away from stringing at the about 2m of pipe trench center line one side；Bilateral immersed tube location, by the direct cloth of pipeline at pipe trench center
On line.
For having the location of preferable ground bearing pressure, transported and managed using gun carriage, stringing is carried out with sideboom tractor.For bearing capacity
Excavator traction ship shape sledge fortune pipe can be used in the location of difference.
Step 5：Tube group butt welding, non-destructive testing, corrosion-resistanting interpolating port mend wound；
Pipeline is grouped on ditch, welds, and weld bond carries out corrosion-resistanting interpolating port operation, apply immediately after non-destructive testing qualification
Work method and quality requirement are the same as general location.
Under immersed tube before ditch, electric spark leak detection is carried out to erosion resistant coating in advance, anti-corrosion is carried out in time to the dew point checked and mends wound,
After rechecking qualification, ditch operation under immersed tube is carried out.
Step 6：Ditch under pipe canal digging and immersed tube；
It cannot meet immersed tube requirement for pipeline location.Pipeline location is re-started into levelling before immersed tube.
Step 61：According to construction drawing, projected depth, elevation are labeled on pipeline, carried for manipulator and inspection personnel
For site technology data, the particularly Special zones such as abrupt slope, low-lying, irrigation canals and ditches answer emphasis to mark；
Step 62：Before pipe canal digging, welding and the anticorrosive construction of pipeline cathode protection wiring are carried out by design position, and it is pre-
Stay the cable of sufficient length；
Step 63：Pipe end is blocked using steel plate, full weld, and outside is sealed with shrinkage band；
Step 64：3 pipes are swung into precalculated position, are fixed 3 pipelines simultaneously with strapping；
For there is the through section of underground obstacle, its interim disconnection, immersed tube are connected again after finishing during immersed tube
It connects；If barrier cannot disconnect temporarily, reserved a certain distance pipeline does not weld before and after barrier, treats two side ducts immersed tube
After finishing, crossing construction is carried out.When finding unknown barrier during immersed tube, immersed tube operation should be stopped immediately, find out barrier
Specific location and classification carry out further work after arrangement and method for construction to be determined.
Step 65：Pipe canal digging, individual layer cutting depth are less than pipeline maximum flying height；
Pipeline maximum stress calculates in immersed tube：
Below only Stress calculation is carried out by taking Φ 711 × 10.3mm tubing as an example
1) it is known：
Pipeline substance：Q=3.024kg/m；The tubing allowable stress of L450 materials is：[σ]=5500kg/cm2；Pipeline
Elasticity modulus：Ε=2.1 × 106kg/cm2。
2) maximal bending moment that pipeline allows：
By formula：σmax=MmaxX1≤[σ]
：Mmax≤[σ]/X1=1.13 × 108kgcm
In formula：X1For constant.
3) individual layer maximum cutting depth is adjusted：
By formula：Mmax=L2X2
Obtain pipeline maximum pendulous tank：L=64.4m
According to formula：H=L4X3
Draw pipeline maximum flying height：H=4.59m
In formula：X2、X3Respectively constant.
It is learnt by calculating, individual layer cutting depth is less than 4.59m with regard to that can meet the intensity requirement of pipeline during immersed tube, works as pipe trench
Depth should carry out immersed tube operation when being more than 4.59m by the way of stage excavation, to prevent pipeline stress is excessive from deforming,
It should be in pipe trench end excavated slope changeover portion.
For the erosion resistant coating leak source occurred in digging process, immersed tube should be stopped and excavate operation, carried out anti-corrosion in time and mend wound, warp
Immersed tube operation is further continued for after electric spark leak detection is qualified.
Since the bearing capacity of soil is poor, mound should be maintained at more than 1.5m away from pipe trench edge.Immersed tube is from one end of pipeline section
Start, excavation starting point will be no less than 3m more than pipe end to be advisable.
Step 66：Ditch operation under immersed tube；Pipeline, will be after welding using the dead weight of pipeline and elasticity under the action of gravity
Pipeline slowly sink to bottom of trench, invest pipe trench bottom, pipeline made to reach the design depth of burying, complete the process of lower ditch.
After pipe canal digging is to certain length, pipe end starts to sink under gravity, continues to excavate, pipe end is attached at
Bottom of trench.With the progress of excavation, pipeline relies on own wt nature, is steadily settled down to pipe trench bottom, and near bottom of trench is completed every time
Length can remove strapping when being more than 100 meters, be separated 3 pipelines by design requirement spacing successively using sideboom tractor, complete
Immersed tunnel.
The rubber slab of certain length, thickness for 10mm is wound in pipeline external anti-corrosion layer during ditch under immersed tube, according to the position of immersed tube
It puts and moves at any time, prevent damage during excavator operation erosion resistant coating and pipeline.
As shown in Figure 1, it is the construction schematic diagram of unilateral immersed tube in the present invention.
1st, unilateral immersed tube.
When by operation bandwidth when factors restrict, using unilateral immersed tube, i.e., using excavator heart line in the duct
One side carries out ditch under pipe canal digging immersed tube.
(1) during unilateral immersed tube, steel pipe tube wall is no more than 2m away from pipe trench center, and mechanical equipment track (shoe) is away from tube wall distance
1m, i.e., close to buttress outside, it is ensured that counter weight of excavator revolution space avoids bringing damage to pipeline outer wall erosion resistant coating, returns the earthwork
To can be determined according to landform and construction operation band.
(2) during pipe canal digging, the method for excavation section by section can be taken to carry out ditching, to reduce pipeline because self gravitation produces
Raw stress.
(3) accommodation of unilateral immersed tube：Unilateral immersed tube is limited the lower ditch in location suitable for narrow field, operation bandwidth
Operation, in the case of normal construction operation band than design width along immersed tube one side about 2 meters of ultra-wide.
2nd, bilateral immersed tube；
As shown in Fig. 2, it is the construction schematic diagram of bilateral immersed tube in the present invention.
Excavation operation is respectively carried out at the same time using an excavator in the both sides of pipeline, it is slow using the dead weight and elasticity of steel pipe
Ground sinks to bottom of trench, completes Immersed tunnel.
It is required that two excavators, in same position, equidirectional while operation, a rate of advance will be unanimously.
The scope of application of bilateral immersed tube：Suitable for place is wider, physical features is flat paddy field, marsh, wetland, quicksand, mud
Wait the lower ditch operation in locations, in the case of normal construction operation band than design width per side about 3 meters of ultra-wide.
Step 7：Buried depth of pipeline detects；
Under pipeline immersed tube after ditch, after pipeline is separated with excavator, buried depth of pipeline inspection and pipeline digitlization are carried out in time
The collecting work of information, buried depth of pipeline should meet design requirement, and bottom of trench width should meet laying silicone tube requirement.
Under immersed tube during ditch, it is desirable that buried depth detection work is synchronous with ditching immersed tube to be carried out, general location per pass weld bond measurement one
It is secondary；Chuan He, Chuan Lu, longitudinal key areas such as elbow and bend pipe, knick point increase measurement frequency, the position inadequate to checking depth
It puts and is rectified and improved immediately, ensure that buried depth of pipeline meets the requirements.
Step 8：Pipeline backfills and land restoration.
Immersed tube in place after, backfilling of pipe canal should be carried out in time.The moon is protected into cable one end before backfilling of pipe canal and leads to earth's surface, and is done
Good mark, facilitates the construction of follow-up cathodic protection test pile.
To prevent soil from back-silting, cause pipe trench depth inadequate, general location requirement is backbreak 200mm than design ditch depth；On ground
The location that lower water level is high, water percolating capacity is big, to prevent from floating pipe, should carry out draining in time, use sand at the top of pipeline if necessary
Bag carry out ballast processing.
After descending pipelines into ditch backfill, ground audio leak detection is carried out, carries out excavating in time if any leak source mending wound.
Term used herein is explanation and term exemplary, and not restrictive.Since the present invention can be with a variety of
Form specific implementation without departing from the spiritual or substantive of invention, it should therefore be appreciated that above-described embodiment be not limited to it is any foregoing
Details, and should widely being explained in the spirit and scope that appended claims are limited, thus fall into claim or its etc.
Whole variations and remodeling in the range of effect all should be appended claims and covered.
Claims (7)
1. a kind of heavy caliber long range multitube is the same as ditch Immersed tunnel method, it is characterised in that：During pipe canal digging, individual layer cutting depth
Less than pipeline maximum flying height；Under immersed tube during ditch operation, pipeline is under the action of gravity, dead weight and elasticity using pipeline
Pipeline after welding is slowly sunk into bottom of trench, invests pipe trench bottom, pipeline is made to reach the design depth of burying.
2. heavy caliber long range multitube as described in claim 1 is the same as ditch Immersed tunnel method, which is characterized in that pipe canal digging and heavy
Before the lower ditch of pipe, according to construction drawing, projected depth, elevation are labeled on pipeline；Before pipe canal digging, carried out by design position
The welding of pipeline cathode protection wiring and anticorrosive construction, and the cable of reserved sufficient length；Pipe end is blocked using steel plate, is full
Weldering, outside are sealed with shrinkage band；More pipelines are swung into precalculated position, are fixed more pipelines simultaneously with strapping；Pipe trench
It excavates, individual layer cutting depth is less than pipeline maximum flying height.
3. heavy caliber long range multitube as described in claim 1 is the same as ditch Immersed tunnel method, it is characterised in that：Pipeline allows most
Big moment of flexure：Mmax≤[σ]/X1, in formula：X1For constant, [σ] is tubing allowable stress；By formula Mmax=L2X2Draw individual layer maximum
Cutting depth L, pipeline maximum flying height H=L4X3, X2、X3Respectively constant.
4. heavy caliber long range multitube as described in claim 1 is the same as ditch Immersed tunnel method, it is characterised in that：For prevent pipeline because
Stress is excessive to deform, should be in pipe trench end excavated slope changeover portion.
5. heavy caliber long range multitube as described in claim 1 is the same as ditch Immersed tunnel method, it is characterised in that：Under immersed tube during ditch
Pipeline external anti-corrosion layer winds rubber slab.
6. heavy caliber long range multitube as described in claim 1 is the same as ditch Immersed tunnel method, it is characterised in that：Before pipe canal digging
Step includes preparation of construction, surveying setting-out, the build of operation band, transport stringing, tube group butt welding, non-destructive testing, corrosion-resistanting interpolating port
The step of mending wound and pipeline backfill and land restoration.
7. heavy caliber long range multitube as claimed in claim 6 is the same as ditch Immersed tunnel method, it is characterised in that：During surveying setting-out,
Repetition measurement is carried out to each corner pile with position indicator, releases pipe trench center line, operation band and land for roads boundary line of marching into the arena；Transport cloth
Guan Shi, unilateral immersed tube location is in tube wall away from pipe trench center line one side stringing, and bilateral immersed tube location is by the direct cloth of pipeline in pipe trench
On heart line；Under immersed tube before ditch, electric spark leak detection is carried out to erosion resistant coating, anti-corrosion is carried out in time to the dew point checked and mends wound, through multiple
After inspection is qualified, ditch operation under immersed tube is carried out.
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| CN201711330230.4A CN108086358B (en) | 2017-12-13 | 2017-12-13 | Large-caliber long-distance multi-pipe same-ditch immersed pipe construction method |
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|---|---|---|---|
| CN201711330230.4A CN108086358B (en) | 2017-12-13 | 2017-12-13 | Large-caliber long-distance multi-pipe same-ditch immersed pipe construction method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109507287A (en) * | 2018-11-12 | 2019-03-22 | 中国二冶集团有限公司 | Pipeline non-destructive testing construction method |
| CN110611286A (en) * | 2019-10-30 | 2019-12-24 | 海风电气(江苏)有限公司 | Ocean engineering power cable system and arrangement method thereof |
| CN110688719A (en) * | 2019-10-10 | 2020-01-14 | 中国人民解放军63926部队 | Method for calculating maximum length of right-angle pipe trench passing through pipeline |
| CN112253847A (en) * | 2020-10-17 | 2021-01-22 | 中石化石油工程技术服务有限公司 | Pipeline construction method for sand geological water network area |
| CN115544702A (en) * | 2022-10-25 | 2022-12-30 | 中国石油大学(北京) | Method, device and equipment for checking stress of oil-gas pipeline immersed tube construction and storage medium |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1558130A (en) * | 2004-01-30 | 2004-12-29 | 胜利油田胜利石油化工建设有限责任公 | Down-ditch construction method for laying heavy caliber pipeline |
| CN105626963A (en) * | 2016-04-11 | 2016-06-01 | 中国石油大学(华东) | Channel-type hanging submarine pipeline slinging treatment device and construction method thereof |
| CN106120859A (en) * | 2016-07-02 | 2016-11-16 | 天鸿建设集团有限公司 | A kind of construction method of many pipeline sections immersed tube river crossing |
| CN106247007A (en) * | 2016-08-22 | 2016-12-21 | 中煤建安第七工程有限公司 | Remote major diameter industrial pipeline deadweight conjugates underlying laying direct-burried construction method |
-
2017
- 2017-12-13 CN CN201711330230.4A patent/CN108086358B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1558130A (en) * | 2004-01-30 | 2004-12-29 | 胜利油田胜利石油化工建设有限责任公 | Down-ditch construction method for laying heavy caliber pipeline |
| CN105626963A (en) * | 2016-04-11 | 2016-06-01 | 中国石油大学(华东) | Channel-type hanging submarine pipeline slinging treatment device and construction method thereof |
| CN106120859A (en) * | 2016-07-02 | 2016-11-16 | 天鸿建设集团有限公司 | A kind of construction method of many pipeline sections immersed tube river crossing |
| CN106247007A (en) * | 2016-08-22 | 2016-12-21 | 中煤建安第七工程有限公司 | Remote major diameter industrial pipeline deadweight conjugates underlying laying direct-burried construction method |
Non-Patent Citations (1)
| Title |
|---|
| 吴建中: "《油气管道工程监理实用手册》", 31 January 2006, 中国计量出版社 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109507287A (en) * | 2018-11-12 | 2019-03-22 | 中国二冶集团有限公司 | Pipeline non-destructive testing construction method |
| CN110688719A (en) * | 2019-10-10 | 2020-01-14 | 中国人民解放军63926部队 | Method for calculating maximum length of right-angle pipe trench passing through pipeline |
| CN110611286A (en) * | 2019-10-30 | 2019-12-24 | 海风电气(江苏)有限公司 | Ocean engineering power cable system and arrangement method thereof |
| CN112253847A (en) * | 2020-10-17 | 2021-01-22 | 中石化石油工程技术服务有限公司 | Pipeline construction method for sand geological water network area |
| CN112253847B (en) * | 2020-10-17 | 2022-04-26 | 中石化石油工程技术服务有限公司 | Pipeline construction method for sand geological water network area |
| CN115544702A (en) * | 2022-10-25 | 2022-12-30 | 中国石油大学(北京) | Method, device and equipment for checking stress of oil-gas pipeline immersed tube construction and storage medium |
| CN115544702B (en) * | 2022-10-25 | 2023-05-02 | 中国石油大学(北京) | Oil-gas pipeline immersed tube construction stress checking method, device, equipment and storage medium |
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| CN108086358B (en) | 2020-08-11 |
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