CN1587771A - Construction method for polyvinyl plastic pipeline long distance deep water crossing river - Google Patents
Construction method for polyvinyl plastic pipeline long distance deep water crossing river Download PDFInfo
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- CN1587771A CN1587771A CN 200410054203 CN200410054203A CN1587771A CN 1587771 A CN1587771 A CN 1587771A CN 200410054203 CN200410054203 CN 200410054203 CN 200410054203 A CN200410054203 A CN 200410054203A CN 1587771 A CN1587771 A CN 1587771A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 61
- 238000010276 construction Methods 0.000 title claims abstract description 49
- 229920003023 plastic Polymers 0.000 title claims abstract description 25
- 239000004033 plastic Substances 0.000 title claims abstract description 25
- 229920002554 vinyl polymer Polymers 0.000 title claims description 20
- 238000000034 method Methods 0.000 claims abstract description 35
- 238000012544 monitoring process Methods 0.000 claims abstract description 8
- 238000004659 sterilization and disinfection Methods 0.000 claims abstract description 4
- 238000012360 testing method Methods 0.000 claims description 18
- 238000005259 measurement Methods 0.000 claims description 12
- 238000003466 welding Methods 0.000 claims description 8
- 229910000831 Steel Inorganic materials 0.000 claims description 7
- 238000009412 basement excavation Methods 0.000 claims description 7
- 239000010959 steel Substances 0.000 claims description 7
- 239000004576 sand Substances 0.000 claims description 5
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 230000002262 irrigation Effects 0.000 claims description 3
- 238000003973 irrigation Methods 0.000 claims description 3
- 230000000630 rising effect Effects 0.000 claims description 3
- 238000011144 upstream manufacturing Methods 0.000 claims description 3
- 230000007423 decrease Effects 0.000 claims description 2
- 238000012545 processing Methods 0.000 claims description 2
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 239000004568 cement Substances 0.000 abstract 1
- 238000001514 detection method Methods 0.000 abstract 1
- 230000004807 localization Effects 0.000 abstract 1
- 229920000573 polyethylene Polymers 0.000 abstract 1
- 238000005070 sampling Methods 0.000 abstract 1
- 230000001954 sterilising effect Effects 0.000 abstract 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 4
- 239000002184 metal Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 241001236644 Lavinia Species 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 230000004308 accommodation Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000003034 coal gas Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
Abstract
The invention relates to long distance and deep water construction method of polythene plastic pipes. The method includes following steps: pipe position measuring and sampling, embeds wire protecting piles, forms construction control wire; the localization of constructing ship; groove digging; underwater monitoring and groove amendment; pipes connecting; arranges weight cement and floating ball on the pipe; the pipe arrives the position and is fixed; pipe detection and process underwater; groove filling; pipe pressure detecting; pipe rinsing and sterilization. The invention uses the beneficial character of the plastic pipe effectively, thus the quality of the project is more reliable.
Description
Technical field
The present invention relates to pipeline and get over the river method of construction, particularly relate to polyvinyl plastics pipeline length and get over the river method of construction apart from deep water.
Background technique
The laying of pipeline is mostly in land construction, and longly gets over the river construction because river feature, geological condition, hydrometeorology vary apart from deep water, and its difficulty of construction is much larger than constructing on land.The river pipeline construction should be taked suitable mutually method according to the actual conditions of job site more.
The general metal tubes that adopt of existing river water supply line more seldom use plastic tube more, especially still less use plastic pipe in the big rivers of the wide degree of depth of river surface.Vinyl tube is a kind of emerging water-feeding pipes, has corrosion-resistant, long service life, an advantage such as cost is low, water resistance is little.Though vinyl tube has above-mentioned advantage, but because the material behavior and the metal tube of plastic tube have very big difference, therefore existing river is more laid the method for construction of metal tube and is not suitable for vinyl tube and lays, a kind of very ripe, high quality is not in fact arranged so far as yet, high efficiencyly get over the method for construction that plastic pipe is laid in the river, greatly limited the application of this outstanding tubing of vinyl tube thus in the big occasion of the wide degree of depth of river surface.
Summary of the invention
The purpose of this invention is to provide a kind of efficient, reliable, practical polyvinyl plastics pipeline length and get over the river method of construction apart from deep water.
Polyvinyl plastics pipeline length provided by the invention is got over the river method of construction apart from deep water, is characterized in, comprises following method and step:
A. adopt GPS navigation system, electronic tachometer and sounding machine that primary terrain land and process place under water is checked measurement, manage a position measurement setting-out, bury the wire-protecting stake underground, form the construction control lead according to measurement situation and designing requirement;
B. by the monitoring of GPS navigation system and electronic tachometer, will inhale large junk and accurately be positioned in time dowel pile to be squeezed in the water on the construction pipe position, the dowel pile front and back on every ship are no less than 4;
C. adopt towards suction formula trench digging unit and carry out channel excavation;
D. by the monitoring of GPS navigation system and electronic tachometer, the float platform that will be used for pipeline splicing and loading counterweight accurately is positioned construction pipe position, and float platform is equipped with 5 anchors, and both sides respectively are 2, and platform moves 1 in the place ahead;
E. use the degree of depth of sounding machine tracking measurement groove; Cooperate inspecting of underwater operation by the diver, and adopt high pressure water gun under water out-of-flatness place to be filled up or washed away by it;
F. by pipe supply barge pipeline is lightered construction area, pipeline is moved to the position that overlaps with the groove that has excavated at the bottom of the river on the float platform with crane;
G. at a pipe end welding flange of first pipeline, with its shutoff, one of welding has the steel pipe of valve control on the vexed plate of flange, between valve and the vexed plate blow-off tee is installed with the vexed plate of flange;
H. in fused conduit on the river surface to being about about 200 meters, counterweight concrete piece and ball float are installed on pipeline, subsequently the pipeline that welding is good is moved on the groove position of having excavated, utilize the rising tide time in stage, an end that pipeline is equipped with the vexed plate of flange is moved the bank to, the place firmly hitches it with rope at tube head, is an anchor at a certain distance on 200 meters floating pipelines, guarantees that pipeline keeps straight line in current;
I. be positioned at water intake on the vexed plate of shutoff of bank one end to the pipeline water filling by pipeline, begin to sink until pipeline; Begin progressively to remove ball float on the pipeline from the water filling end of pipeline, still swim on the water surface to the pipeline of a suitable segment distance that links to each other with float platform till;
J. by control, make float platform to moving ahead and locating to the float platform anchor position; Continue fused conduit, counterweight concrete piece and ball float are installed on pipeline; Repeat the i step then; This construction sequence is gone round and begun again, and arrives the precalculated position until pipeline;
K. in-water survey and processing;
L. backfill pipe trench;
M. whole pipe is carried out water-filling and soak, then the pressure testing pipeline section is carried out the water filling applied voltage test;
N. pipeline is carried out irrigation and disinfection.
Above-mentioned polyvinyl plastics pipeline length is got over the river method of construction apart from deep water, and wherein step a is described buries the wire-protecting stake underground, and its method is: insert in the water with the DN40 Coating Steel Pipe of the respective length segment distance of being separated by.
Above-mentioned polyvinyl plastics pipeline length is got over the river method of construction apart from deep water, the described channel excavation of step c wherein, its method is: at first adopt high-power strand to inhale the formula dredge boat mud in each 30 meters scope of whole groove axis upstream and downstream and sand heap head part are dug clearly, excavate out a basic working platform, excavate groove then, simultaneously with sounding machine and GPS navigation system control groove depth and ship position.
Above-mentioned polyvinyl plastics pipeline length is got over the river method of construction apart from deep water, wherein step m is described to water filling of pressure testing pipeline section and applied voltage test, and its method is: the baffle plate of pressure testing pipeline section adopts the vexed plate of steel, supports and adopts steel sheet pile, integrally welded, outlet valve and pressure gauge are installed in pipeline two; The air in the pipeline is got rid of in water filling in the pressure testing pipe slowly simultaneously, slowly is forced into 0.8Mpa; Keep after 10 minutes, it is qualified that pressure value decline is no more than 0.05Mpa.
Technological scheme of the present invention has effectively been utilized the beneficial characteristics of plastic tube, has evaded plastic tube to the adverse effect that construction brings, and the construction quality that makes polyvinyl plastics pipeline length get over Jiang'an dress apart from deep water is guaranteed that reliably efficiency of construction is improved; Adopt technological scheme of the present invention, only need utilization to get over the required common equipment of river tubing and get final product, needn't specially acquire special device for engineering.
Description of drawings
Fig. 1 is a method of construction floor map of the present invention;
Fig. 2 is a method of construction elevational schematic view of the present invention.
Embodiment
Further specify method of construction of the present invention below in conjunction with drawings and Examples.
Embodiment constructs and a little is located in tideway, wind is anxious, and the wave is high that current are fast, and landform is changeable, river feature: width is 1200 meters, the minimum absolute altitude in riverbed is-9.11m, the mean high tide absolute altitude is 4.81m, and mean low-water is 1.01m, 3.8 meters of fluctuation tide mean range of tide, maximum water depth reaches 14 meters, flood strength is 0.8 meter per second, and the ebb flow velocity reaches 1.3 meter per seconds, and geology is mainly medium sand.The pipeline of required laying is the polyvinyl plastics feedwater piping of diameter 630mm.
The method of construction and the step of present embodiment are as follows.
A. at first adopt GPS navigation system, electronic tachometer and sounding machine that land and submarine pipeline are checked measurement through the primary terrain at place according to designing requirement; manage position measurement setting-out according to measurement situation and designing requirement; bury the wire-protecting stake underground, form the construction control lead.Because that measures that the correctness of setting-out directly has influence on engineering carries out quality with engineering smoothly,, all there is the supervising engineer to check so whenever finish a step; Consider that in the waters construction conventional wires protection stake is difficult for burying underground and protecting, a segment distance inserts in the water, as the pipeline reference line so the DN40 Coating Steel Pipe of employing respective length is separated by.
B. as shown in Figure 1, by the monitoring of GPS navigation system and electronic tachometer, dredger 2 accurately being positioned in time dowel pile 3 to be squeezed in the water on the construction pipe position 1, is to guarantee 2 stable, the accurate location of ship, and dowel pile 3 front and back on every ship 2 have four.
C. by the design working drawing requirement, the pipeline groove section is: the wide 5.63m of channel bottom, and the slope is the characteristics of medium sand than being 1: 5 according to top layer, navigation channel geology, adopts towards suction formula trench digging unit and carries out channel excavation; In order to guarantee that pipeline has enough landfill degree of depth, reduce of the influence of pipe trench axis shift to the pipe laying position accuracy, adopt the stage excavation method, the cycle of back-silting and producing with shortening, concrete grammar is: adopt high-power strand suction formula dredge boat interior mud of each 30 meters scope of 2 pairs of whole groove axis upstream and downstream and sand heap head to dig clearly earlier, excavate out a basic working platform, riverbed in the pipe laying axis scope is tended towards stability, inhale formula dredge boat 2 excavation grooves by another high-power strand following closely, be equipped with sounding machine and GPS navigation system simultaneously and control groove depth and ship position at any time, so that in time adjust the accommodation skew and the groove depth of construction ship.
D. see also Fig. 1.Monitoring by GPS navigation system and electronic tachometer, the float platform 4 that will be used for pipeline splicing and loading counterweight accurately is positioned construction pipe position 1, because construction is the process of working continuously, for guaranteeing the safety of pipeline, must guarantee that pipeline float platform 4 when splicing and loading is steady, the steady and may command in the time of also will guaranteeing float platform 4 displacements subsequently, float platform 4 is equipped with 5 anchors 7, the both sides of platform 4 respectively are 2,1 in mobile the place ahead; Moving ahead without power equipment of float platform 4 is all by traction or shrink the anchor line that float platform 4 moves the anchor 7 in the place ahead and realize.
E. because be underwater operation, can't carry out directly effectively monitoring, so with the degree of depth of sounding machine tracking measurement groove to groove; Cooperate inspecting of underwater operation by the diver again, and adopt high pressure water gun under water out-of-flatness place to be filled up or washed away by it.
F. by pipe supply barge 6 pipeline 5 is lightered construction area, pipeline 5 is moved to the position that overlaps with the groove that has excavated at the bottom of the river on the float platform 4 with crane.
G. at a pipe end welding flange of first pipeline, with its shutoff, steel pipe that has the inflow control valve of welding on the vexed plate of flange is provided with three exhausts when being common to into water between valve and the vexed plate with the vexed plate of flange.
H. see also Fig. 2.In fused conduit on the river surface 5 to being about about 200 meters; In pipeline 5 peripheries an amount of ball float 8 is installed then, and every 4 meters counterweight concrete pieces 9 that load constant weight, the configuration of ball float 8 and concrete piece 9 is unlikely too big and cause pipeline 5 jackknifings to be as the criterion with the pipeline that places water 5 and the angle of horizontal plane of the end that can guarantee in the pipeline after the water filling to be connected with float platform; Pipeline 5 is aimed at the groove position of having excavated, utilize the rising tide time in stage, move an end of the good tube head of shutoff to bank, 3 Vertical direction it is firmly hitched respectively with 3 nylon ropes at the tube head place, on 200 meters floating pipelines, be an anchor, guarantee that pipeline 5 keeps straight line in current every 12 meters distances.
I. select low tide watermark level time of tide section, be positioned at water intake on the vexed plate of shutoff of bank one end by pipeline, begin to sink until pipeline to the pipeline water filling; Begin progressively to remove ball float on the pipeline from the water filling end of pipeline, still swim on the water surface to the pipeline of a suitable segment distance that links to each other with float platform till;
J. the move forward anchor position of float platform 4 makes float platform 4 to moving ahead and locating; Continue fused conduit 5, ball float 8 and counterweight concrete piece 9 are installed; Pipeline 5 accurately repeats the i step behind the location on the groove position; This construction sequence is gone round and begun again, and arrives the precalculated position until pipeline.
K. near the foundation trench the pipeline is checked at following water by the diver, the location that is uneven around the pipeline is washed away and filled up with high pressure water gun.
L. in the level tide, with two barge hoppers arranged side by side, open the bilge simultaneously above pipe trench, it is heavy to the bottom that packed yellow ground is taken advantage of a situation.
M. whole pipe is carried out water-filling and soak, pipeline soak time under working pressure is no less than 24 hours; Then water filling is forced into test pressure to the pressure testing pipeline section.
N. pipeline is carried out irrigation and disinfection.
Technical order:
Strength test: test pressure is 0.8Mpa, and the time is 10 minutes, falls and presses 0.01Mpa;
Leak test: test pressure is 0.7Mpa, and the time is 15 minutes, falls to press to be no more than 0.01Mpa.
The present invention has taken into full account the material behavior of plastic tube, and high efficiency has solved polyvinyl plastics pipeline length in high quality and got over the river construction apart from deep water under the condition of not acquiring any special device.Method of construction of the present invention is not only applicable to water supply line, also can widen the construction of pipelines such as being applied to rock gas, coal gas and sewage, polyvinyl plastics tubing was applied to the river engineering has very big promoting effect.
Claims (4)
1, a kind of polyvinyl plastics pipeline length is got over the river method of construction apart from deep water, it is characterized in that, comprises following method and step:
A. adopt GPS navigation system, electronic tachometer and sounding machine that primary terrain land and process place under water is checked measurement, manage a position measurement setting-out, bury the wire-protecting stake underground, form the construction control lead according to measurement situation and designing requirement;
B. by the monitoring of GPS navigation system and electronic tachometer, will inhale large junk and accurately be positioned in time dowel pile to be squeezed in the water on the construction pipe position, the dowel pile front and back on every ship are no less than 4;
C. adopt towards suction formula trench digging unit and carry out channel excavation;
D. by the monitoring of GPS navigation system and electronic tachometer, the float platform that will be used for pipeline splicing and loading counterweight accurately is positioned construction pipe position, and float platform is equipped with 5 anchors, and both sides respectively are 2, and platform moves 1 in the place ahead;
E. use the degree of depth of sounding machine tracking measurement groove; Cooperate inspecting of underwater operation by the diver, and adopt high pressure water gun under water out-of-flatness place to be filled up or washed away by it;
F. by pipe supply barge pipeline is lightered construction area, pipeline is moved to the position that overlaps with the groove that has excavated at the bottom of the river on the float platform with crane;
G. at a pipe end welding flange of first pipeline, with its shutoff, one of welding has the steel pipe of valve control on the vexed plate of flange, leaves blow-off tee between valve and the vexed plate with the vexed plate of flange;
H. in fused conduit on the river surface to being about about 200 meters, counterweight concrete piece and ball float are installed on pipeline; Subsequently the pipeline that welding is good is moved on the groove position of having excavated, utilize the rising tide time in stage, an end that pipeline is equipped with the vexed plate of flange is moved the bank to, it is firmly hitched with rope at the tube head place; Be an anchor at a certain distance on 200 meters floating pipelines, guarantee that pipeline keeps straight line in current;
I. be positioned at water intake on the vexed plate of shutoff of bank one end to the pipeline water filling by pipeline, begin to sink until pipeline; Begin progressively to remove ball float on the pipeline from the water filling end of pipeline, still swim on the water surface to the pipeline of a suitable segment distance that links to each other with float platform till;
J. by control, make float platform to moving ahead and locating to the float platform anchor position; Continue fused conduit, counterweight concrete piece and ball float are installed on pipeline; When pipeline is accurately repeating the i step behind the location on the groove position; This construction sequence is gone round and begun again, and arrives the precalculated position until pipeline;
K. carry out in-water survey and processing;
L. backfill pipe trench;
M. whole pipe is carried out water-filling and soak, then the pressure testing pipeline section is carried out the water filling applied voltage test;
N. pipeline is carried out irrigation and disinfection.
2, polyvinyl plastics pipeline length according to claim 1 is got over the river method of construction apart from deep water, it is characterized in that, step a is described to bury the wire-protecting stake underground, and its method is: insert in the water with the DN40 Coating Steel Pipe of the respective length segment distance of being separated by.
3, polyvinyl plastics pipeline length according to claim 1 is got over the river method of construction apart from deep water, it is characterized in that, the described channel excavation of step c, its method is: at first adopt high-power strand to inhale the formula dredge boat mud in each 30 meters scope of whole groove axis upstream and downstream and sand heap head are dug clearly, excavate out a basic working platform, excavate groove then, simultaneously with sounding machine and GPS navigation system control groove depth and ship position.
4, polyvinyl plastics pipeline length according to claim 1 is got over the river method of construction apart from deep water, it is characterized in that, step m is described to water filling of pressure testing pipeline section and applied voltage test, its method is: the baffle plate of pressure testing pipeline section adopts the vexed plate of steel, support and adopt steel sheet pile, integrally welded, outlet valve and pressure gauge are installed in pipeline two; The air in the pipeline is got rid of in water filling in the pressure testing pipe slowly simultaneously, slowly is forced into 0.8Mpa; Keep after 10 minutes, it is qualified that pressure value decline is no more than 0.05Mpa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410054203 CN1262780C (en) | 2004-09-02 | 2004-09-02 | Construction method for polyvinyl plastic pipeline long distance deep water crossing river |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410054203 CN1262780C (en) | 2004-09-02 | 2004-09-02 | Construction method for polyvinyl plastic pipeline long distance deep water crossing river |
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| Publication Number | Publication Date |
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| CN1587771A true CN1587771A (en) | 2005-03-02 |
| CN1262780C CN1262780C (en) | 2006-07-05 |
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| CN 200410054203 Active CN1262780C (en) | 2004-09-02 | 2004-09-02 | Construction method for polyvinyl plastic pipeline long distance deep water crossing river |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103899842A (en) * | 2014-04-23 | 2014-07-02 | 中国海洋石油总公司 | Method for installing deepwater online tee joint |
| 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 |
| CN106704705A (en) * | 2017-01-12 | 2017-05-24 | 中交天航南方交通建设有限公司 | Water pipeline assembly operation method and system |
| CN107763307A (en) * | 2017-09-27 | 2018-03-06 | 广西建工集团第五建筑工程有限责任公司 | A kind of water filling nature immersed tube crosses the installation method of river pipeline |
| CN107965616A (en) * | 2017-11-21 | 2018-04-27 | 中交二航局第三工程有限公司 | The underwater aqueduct transportation by driving device and method of major diameter |
| CN111691481A (en) * | 2020-06-17 | 2020-09-22 | 无锡市航道工程有限公司 | Immersed tube construction process for laying sewage interception main pipe |
| CN112814118A (en) * | 2020-12-29 | 2021-05-18 | 中交第三航务工程局有限公司江苏分公司 | Connection construction method for turning section of sea pipeline |
| CN113175017A (en) * | 2021-04-22 | 2021-07-27 | 浙江科欣工程设计咨询有限公司 | Construction process for sinking pipe of large-depth underwater water supply pipe |
| CN113531210A (en) * | 2021-07-06 | 2021-10-22 | 广西华硕建设工程有限公司 | Method for underwater immersed tube construction |
-
2004
- 2004-09-02 CN CN 200410054203 patent/CN1262780C/en active Active
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103899842B (en) * | 2014-04-23 | 2017-01-11 | 中国海洋石油总公司 | Method for installing deepwater online tee joint |
| CN103899842A (en) * | 2014-04-23 | 2014-07-02 | 中国海洋石油总公司 | Method for installing deepwater online tee joint |
| CN106120859B (en) * | 2016-07-02 | 2021-07-16 | 天鸿建设集团有限公司 | Construction method for river crossing by multi-pipe-section immersed tube |
| 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 |
| CN106704705A (en) * | 2017-01-12 | 2017-05-24 | 中交天航南方交通建设有限公司 | Water pipeline assembly operation method and system |
| CN107763307A (en) * | 2017-09-27 | 2018-03-06 | 广西建工集团第五建筑工程有限责任公司 | A kind of water filling nature immersed tube crosses the installation method of river pipeline |
| CN107965616A (en) * | 2017-11-21 | 2018-04-27 | 中交二航局第三工程有限公司 | The underwater aqueduct transportation by driving device and method of major diameter |
| CN107965616B (en) * | 2017-11-21 | 2019-08-13 | 中交二航局第三工程有限公司 | The underwater aqueduct transportation by driving device and method of major diameter |
| CN111691481A (en) * | 2020-06-17 | 2020-09-22 | 无锡市航道工程有限公司 | Immersed tube construction process for laying sewage interception main pipe |
| CN112814118A (en) * | 2020-12-29 | 2021-05-18 | 中交第三航务工程局有限公司江苏分公司 | Connection construction method for turning section of sea pipeline |
| CN113175017A (en) * | 2021-04-22 | 2021-07-27 | 浙江科欣工程设计咨询有限公司 | Construction process for sinking pipe of large-depth underwater water supply pipe |
| CN113531210A (en) * | 2021-07-06 | 2021-10-22 | 广西华硕建设工程有限公司 | Method for underwater immersed tube construction |
| CN113531210B (en) * | 2021-07-06 | 2022-06-21 | 广西华硕建设工程有限公司 | Method for underwater immersed tube construction |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1262780C (en) | 2006-07-05 |
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