CN108560595A - A kind of pre- tensioning system of immersed tube mooring installation anchor system and immersed tube sinking interconnection method - Google Patents
A kind of pre- tensioning system of immersed tube mooring installation anchor system and immersed tube sinking interconnection method Download PDFInfo
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- CN108560595A CN108560595A CN201810700505.7A CN201810700505A CN108560595A CN 108560595 A CN108560595 A CN 108560595A CN 201810700505 A CN201810700505 A CN 201810700505A CN 108560595 A CN108560595 A CN 108560595A
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- 238000009434 installation Methods 0.000 title claims abstract description 109
- 238000000034 method Methods 0.000 title claims abstract description 26
- 230000008878 coupling Effects 0.000 claims abstract description 67
- 238000010168 coupling process Methods 0.000 claims abstract description 67
- 238000005859 coupling reaction Methods 0.000 claims abstract description 67
- 230000001105 regulatory effect Effects 0.000 claims abstract description 5
- 238000004891 communication Methods 0.000 claims description 11
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- 238000005259 measurement Methods 0.000 claims 1
- 238000003032 molecular docking Methods 0.000 abstract description 8
- 238000010276 construction Methods 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 description 2
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Classifications
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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
- E02D29/07—Tunnels or shuttering therefor preconstructed as a whole or continuously made, and moved into place on the water-bed, e.g. into a preformed trench
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D25/00—Joining caissons, sinkers, or other units to each other under water
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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
- E02D29/06—Constructions, or methods of constructing, in water
Abstract
The invention discloses a kind of pre- tensioning systems of immersed tube mooring installation anchor system and immersed tube sinking interconnection method to further include wherein pre- tensioning system includes installation ship：Mooring anchor system, including at least three mooring lines for being connected on installation ship；Tensioning equipment, including it is set to installation ship and winch identical with mooring line number amount, hawser connects a mooring line on each winch；Regulating device is respectively arranged on the hawser of each winch, prestretching angle, stress size, cable length and cable releasing speed parameter for detecting and adjusting hawser；Display device and the control device to work for controling adjustment device.The pre- tensioning system can accurately adjust the position of the installation ship, make its position corresponding with tube coupling to be pacified, simple in structure, easy for installation, precision is higher；Overall operation time and the operating personnel of immersed tube tunnel is greatly reduced in immersed tube sinking interconnection method high degree of automation, is particularly suitable for off-lying sea immersed tube tunnel ultra-large type tube coupling sinking docking construction.
Description
Technical field
The present invention relates to Tunnel Engineering technical field, more particularly to a kind of immersed tube mooring installs the pre- tensioning system of anchor system and sinks
Pipe sinking interconnection method.
Background technology
During the underwater installation of existing immersed tube tunnel more particularly to the installation of off-lying sea immersed tube tunnel tube coupling,
It needs that anchor system is installed using mooring to control the sinking docking of tube coupling.
Existing anchor system usually directly utilizes the mooring anchor system of installation ship, when mounted, the laying side of the mooring anchor system
Method is usually to first pass through surveying vessel positioning anchor point, then casts anchor, uses high-power tugboat to mooring anchor again after casting anchor
System carries out prestretching and is tensioned, and so that installation ship is kept after stablizing, transfers tube coupling to be pacified, then docked with tube coupling has been installed.
The problem of this method is brought is to carry out prestretching just with mooring anchor system and be tensioned, prestretching result can be brought to deposit
Uncertainty, which includes that anchor system pretension size deviation is excessive, position deviation is excessive after anchor system prestretching, anchor system
Angular deviation is excessive after prestretching, directly results in the bigger than normal excessive of the precision of immersed tube sinking docking, influences the peace of immersed tube sinking docking
Fill efficiency.
Invention content
When it is an object of the invention to overcome the existing immersed tube tunnel tube coupling construction in the presence of the prior art, mooring is utilized
Anchor system carries out prestretching and is tensioned, and brings uncertainty existing for prestretching result, including anchor system pretension size deviation is excessive, anchor system
Position deviation is excessive after prestretching, angular deviation is excessive after anchor system prestretching, directly results in the mistake bigger than normal of the precision of immersed tube sinking docking
Big above-mentioned deficiency provides a kind of immersed tube mooring installation anchor system pre- tensioning system, while also providing a kind of immersed tube sinking docking side
Method.
In order to achieve the above-mentioned object of the invention, the present invention provides following technical schemes：
A kind of pre- tensioning system of immersed tube mooring installation anchor system, includes the installation ship for connecting tube coupling to be pacified, further includes：
Mooring anchor system, including at least three mooring lines for being connected on the installation ship；
Tensioning equipment, including it is set to the installation ship and winch identical with the mooring line number amount, each winch
Upper hawser connects a mooring line；
Regulating device is respectively arranged on the hawser of each winch, for detect and adjust hawser prestretching angle, by
Power size, cable length and cable releasing speed parameter；
Display device, prestretching angle, the stress for showing each of the detection device detection winch hawser are big
Small, cable length and cable releasing speed parameter；
Control device works for controling adjustment device.
The immersed tube mooring installs the pre- tensioning system of anchor system other than using the mooring anchor system being arranged on installation ship, also uses
Mooring anchor system is at least three mooring lines, and cooperation tensioning equipment, detection device and display device open installation ship in advance
It draws, since the prestressing force of mooring line on installation ship, prestretching angle and prestretching position can be accurately controlled, can be accurate
Adjusting the installation ship position, make its position corresponding with tube coupling to be pacified, simple in structure, easy for installation, precision is higher, especially
Suitable in off-lying sea immersed tube tunnel ultra-large type tube coupling anchor system prestretching.
Preferably, the pre- tensioning system of immersed tube mooring installation anchor system includes two peaces for being connected to the tube coupling both ends to be pacified
Shipment.
Preferably, the mooring anchor system on each installation ship includes four mooring lines, is connected to the installation ship
Quadrangle.
Preferably, the tube coupling to be pacified is connected with installation anchor system, and the installation anchor system includes being set to around tube coupling to be pacified
At least three mooring anchor points.
Preferably, each mooring line is correspondingly provided with anchor ship, for the anchor of mooring line described in every and casts anchor.
Preferably, immersed tube mooring installation anchor system pre- tensioning system further includes communication device, the communication device with it is described
Display device communication connection, the communication device is used to detect the coordinate information of the anchor ship, anchor system prestretching status information is sent
To the display device and shown.
Preferably, the pre- tensioning system of immersed tube mooring installation anchor system further includes navigation positional device, the navigator fix dress
It sets and measures tower system method TT＆C system, main interface real-time display tube coupling to be pacified comprising transportation by driving navigation software, deep water TT＆C system, stern end
With pacified tube coupling information.
The present invention also provides a kind of immersed tube sinking interconnection methods, pre- using a kind of such as above-mentioned immersed tube mooring installation anchor system
Tensioning system, immersed tube sinking interconnection method include the following steps；
Step 1: according to tube coupling co-ordinate position information to be pacified, installation ship moored position coordinate information is calculated, and then be
Moor the location information that casts anchor of each mooring line in anchor system；
Step 2: each mooring line is unmoored again, the installation ship is sat according to moored position in step 1
Information is marked, is cast anchor respectively to each mooring line；
Step 3: hawser on the winch on each mooring line and installation ship in tensioning apparatus is connected, until that will own
Mooring line is finished with the connection of corresponding winch；
Step 4: after peace tube coupling is moved to immersed tube position, installation ship is connected with each other with tube coupling to be pacified；
Step 5: the hawser of each winch of tightening；
Step 6: pre- tensioning is carried out to the hawser on all winches, each winch above shown according to the display device
Prestressing force where hawser, control device controling adjustment device, prestretching angle, the stress for adjusting hawser on each winch are big
Small, cable length and cable releasing speed parameter, until the co-ordinate position information of installation ship and tube coupling coordinate to be pacified in the step 1
Location information matches, and the tube coupling to be pacified is adjusted to the coordinate position for waiting for sinking at this time；
Step 7: starting tube coupling sinking to be pacified, completing tube coupling sinking to be pacified and being docked with tube coupling has been pacified.
The immersed tube sinking interconnection method uses the immersed tube mooring installation pre- tensioning system of anchor system and carries out pre- tensioning, can
It realizes the prestretching digitlization of immersed tube anchor system, accurately controls anchor system pretension, prestretching angle and prestretching position, improve immersed tube sinking
Dock efficiency；Overall operation time and the operating personnel of immersed tube tunnel is greatly reduced in this method high degree of automation, especially suitable
It docks and constructs for off-lying sea immersed tube tunnel ultra-large type tube coupling sinking.
Preferably, it includes being connected to around it four that two installation ships, each installation ship are used in the step 1
Mooring line.
Preferably, four mooring lines that each installation ship includes, are arranged two-by-two respectively in the left and right sides of installation ship.
Preferably, all winches in the step 6 on installation ship are using successively one by one to corresponding mooring line progress
The adjusting of prestretching angle, stress size, cable length and cable releasing speed parameter, when the prestressing force of the mooring line reaches requirement
When, then carry out the pre- tensioning of second mooring line.
Preferably, tube coupling coordinate position to be pacified in the co-ordinate position information Yu the step 1 of installation ship in the step 6
After information matches, the tube coupling to be pacified is connected with installation anchor system, and the mooring anchor system includes four mooring anchor points, by adjusting four
Tube coupling to be pacified, is finally adjusted to the coordinate position for waiting for sinking by the position of a mooring anchor point.
Compared with prior art, beneficial effects of the present invention：
1, the pre- tensioning system of a kind of immersed tube mooring installation anchor system of the present invention, in addition to using the mooring being arranged on installation ship
Except anchor system, installation anchor system i.e. at least three mooring lines are additionally used, cooperation tensioning equipment, detection device and display device are right
Installation ship carries out pre- tensioning, since the prestressing force of mooring line on installation ship, prestretching angle and prestretching position can be accurately controlled,
Therefore, the position that can accurately adjust the installation ship makes its position corresponding with tube coupling to be pacified, simple in structure, easy for installation,
Precision is higher, is particularly suitable in off-lying sea immersed tube tunnel ultra-large type tube coupling anchor system prestretching；
2, a kind of immersed tube sinking interconnection method of the present invention uses the pre- tensioning system of immersed tube mooring installation anchor system and comes
Pre- tensioning is carried out, the prestretching digitlization of immersed tube anchor system can be realized, accurately control anchor system pretension, prestretching angle and prestretching position
It sets, improves immersed tube sinking docking efficiency；The overall operation time of immersed tube tunnel is greatly reduced in this method high degree of automation
And operating personnel, it is particularly suitable for off-lying sea immersed tube tunnel ultra-large type tube coupling sinking docking construction.
Description of the drawings：
Fig. 1 is the structure composition figure that the pre- tensioning system of anchor system is installed in a kind of immersed tube mooring of the present invention；
Fig. 2 is the signal for the anchor system prestretching tube coupling to be pacified that the pre- tensioning system of anchor system is installed in a kind of immersed tube mooring of the present invention
Figure；
Fig. 3 is the structural schematic diagram for the installation ship that the pre- tensioning system of anchor system is installed in a kind of immersed tube mooring of the present invention.
It is marked in figure：
1, pacified tube coupling, 2, tube coupling to be pacified, 3, installation ship, 4, mooring anchor system, 5, installation anchor system, 6, tensioning equipment, 7, adjust
Regulating device, 8, display device, 9, control device.
Specific implementation mode
With reference to test example and specific implementation mode, the present invention is described in further detail.But this should not be understood
It is only limitted to embodiment below for the range of the above-mentioned theme of the present invention, it is all that this is belonged to based on the technology that the content of present invention is realized
The range of invention.
Embodiment 1
As shown in Figs. 1-3, the pre- tensioning system of a kind of immersed tube mooring installation anchor system, includes the peace for connecting tube coupling 2 to be pacified
It loads 3 onto ship, further includes：
Mooring anchor system 4, including at least three mooring lines for being connected on the installation ship 3；
Tensioning equipment 6, including it is set to the installation ship 3 and winch identical with the mooring line number amount, each strand
Hawser connects a mooring line on vehicle；
Regulating device 7 is respectively arranged on the hawser of each winch, for detect and adjust hawser prestretching angle,
Stress size, cable length and cable releasing speed parameter；
Display device 8, prestretching angle, the stress for showing each of the detection device detection winch hawser are big
Small, cable length and cable releasing speed parameter；
Control device 9 works for controling adjustment device 7.
5 pre- tensioning system of above-mentioned immersed tube mooring installation anchor system includes two installations for being connected to 2 both ends of tube coupling to be pacified
Ship 3.Installation anchor system 5 on each installation ship 3 includes four mooring lines, is connected to the quadrangle of the installation ship 3.Separately
Outside, which is connected with installation anchor system 5, and installation anchor system 5 includes at least three mooring anchors being set to around tube coupling 2 to be pacified
Point.Each mooring line is correspondingly provided with anchor ship, for every mooring line anchor and cast anchor.Further, the immersed tube mooring
It further includes communication device to install 5 pre- tensioning system of anchor system, and the communication device is connected with the communication of the display device 8, described logical
News device is used to detect the coordinate information of the anchor ship, anchor system prestretching status information is sent to the display device 8 and is shown
Show.5 pre- tensioning system of anchor system is installed in immersed tube mooring, can also include navigation positional device, and the navigation positional device includes floating
Transport navigation software, deep water TT＆C system, stern end measure tower system method TT＆C system, main interface real-time display tube coupling 2 to be pacified with pacified
1 information of tube coupling.
The course of work of 5 pre- tensioning system of immersed tube mooring installation anchor system is：After the anchor of anchor ship, navigation positioning system is utilized
Be accurately positioned, cast anchor again to anchor system；Anchor system and 3 winch hawser of installation ship are connected, the essence of navigation positioning system is utilized
Determine that winch hawser is tightened in position, adjustment installation ship 3 to 2 corresponding position of tube coupling to be pacified.Using 3 windlass of installation ship to each anchor system into
Row prestretching one by one, when prestretching the moment observe winch hawser display system, accurate perception anchor system pretension.
The immersed tube mooring installs the pre- tensioning system of anchor system other than using the mooring anchor system 4 being arranged on installation ship 3, also adopts
With the installation anchor system 5 for being set to tube coupling 2 pacify, which uses at least three mooring lines, common cooperation tensioning equipment 6,
Detection device and display device 8 carry out pre- tensioning to installation ship 3, due to that can accurately control pre- of mooring line on installation ship 3
Therefore pulling force, prestretching angle and prestretching position can accurately adjust the position of the installation ship 3, make itself and 2 phase of tube coupling to be pacified
The position answered, simple in structure, easy for installation, precision is higher, is particularly suitable for pre- in off-lying sea immersed tube tunnel ultra-large type tube coupling anchor system
It draws.
Embodiment 2
As shown in Figure 2,3, the present invention also provides a kind of immersed tube sinking interconnection methods, using a kind of such as above-mentioned immersed tube system
The pre- tensioning system of pool installation anchor system, immersed tube sinking interconnection method include the following steps；
Step 1: according to 2 co-ordinate position information of tube coupling to be pacified, 3 moored position coordinate information of installation ship is calculated, and then obtain
The location information that casts anchor of each mooring line in mooring anchor system 4；
Step 2: each mooring line is unmoored again, the installation ship 3 is sat according to moored position in step 1
Information is marked, is cast anchor respectively to each mooring line；
Step 3: hawser on the winch on each mooring line and installation ship 3 in tensioning apparatus is connected, until that will own
Mooring line is finished with the connection of corresponding winch；
Step 4: after peace tube coupling 2 is moved to immersed tube position, installation ship 3 is connected with each other with tube coupling 2 to be pacified；
Step 5: the hawser of each winch of tightening；
Step 6: carry out pre- tensioning to the hawser on all winches, each winch for showing on 8 according to the display device
Prestressing force where hawser, 9 controling adjustment device 7 of control device, prestretching angle, the stress for adjusting hawser on each winch are big
Small, cable length and cable releasing speed parameter, until the co-ordinate position information of installation ship 3 is sat with tube coupling 2 to be pacified in the step 1
Cursor position information matches, at this time the tube coupling 2 to be pacified be adjusted to the coordinate position for waiting for sinking；
Step 7: starting 2 sinking of tube coupling to be pacified, completing 2 sinking of tube coupling to be pacified and being docked with tube coupling 1 has been pacified.
Above-mentioned steps one include four mooring lines being connected to around the installation ship 3.It further, will be in step 1
All mooring lines are symmetrically distributed in around the installation ship 3.In addition, all winches in above-mentioned steps six on installation ship 3
Using the adjusting for successively carrying out prestretching angle, stress size, cable length and cable releasing speed parameter to corresponding mooring line one by one, when
When the prestressing force of the mooring line reaches requirement, then carry out the pre- tensioning of second mooring line.Meanwhile the installation ship in step 6
3 co-ordinate position information in the step 1 after peace 2 co-ordinate position information of tube coupling match after, the tube coupling 2 to be pacified is connected with
Anchor system 5 is installed, the installation anchor system 5 includes four mooring anchor points will finally wait pacifying by adjusting the position of four mooring anchor points
Tube coupling 2 is adjusted to the coordinate position for waiting for sinking.
The immersed tube sinking interconnection method uses the immersed tube mooring installation pre- tensioning system of anchor system and carries out pre- tensioning, can
It realizes the prestretching digitlization of immersed tube anchor system, accurately controls anchor system pretension, prestretching angle and prestretching position, improve immersed tube sinking
Dock efficiency；Overall operation time and the operating personnel of immersed tube tunnel is greatly reduced in this method high degree of automation, especially suitable
It docks and constructs for off-lying sea immersed tube tunnel ultra-large type tube coupling sinking.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
All any modification, equivalent and improvement etc., should all be included in the protection scope of the present invention made by within refreshing and principle.
Claims (10)
1. a kind of pre- tensioning system of immersed tube mooring installation anchor system, which is characterized in that include the installation ship for connecting tube coupling to be pacified,
Further include：
Mooring anchor system, including at least three mooring lines for being connected on the installation ship；
Tensioning equipment, including it is set to the installation ship and winch identical with the mooring line number amount, cable on each winch
Rope one mooring line of connection；
Regulating device is respectively arranged on the hawser of each winch, and prestretching angle, the stress for detecting and adjusting hawser are big
Small, cable length and cable releasing speed parameter；
Display device, prestretching angle, stress size, cable for showing each of the detection device detection winch hawser
Rope length degree and cable releasing speed parameter；
Control device works for controling adjustment device.
2. a kind of pre- tensioning system of immersed tube mooring installation anchor system according to claim 1, which is characterized in that including being connected to
Two installation ships at the tube coupling both ends to be pacified.
3. a kind of pre- tensioning system of immersed tube mooring installation anchor system according to claim 1, which is characterized in that each peace
Mooring anchor system in shipment includes four mooring lines, is connected to the quadrangle of the installation ship.
4. a kind of pre- tensioning system of immersed tube mooring installation anchor system according to claim 1, which is characterized in that described to wait for peace pipe
Section is connected with installation anchor system, and the installation anchor system includes at least three mooring anchor points being set to around tube coupling to be pacified.
5. a kind of pre- tensioning system of immersed tube mooring installation anchor system according to claim 1, which is characterized in that further include communication
Device, the communication device are connected with display device communication, and the communication device is for detecting corresponding to every mooring line
The coordinate information of anchor ship, anchor system prestretching status information are sent to the display device and are shown.
6. according to a kind of any pre- tensioning systems of immersed tube mooring installation anchor system of claim 1-5, which is characterized in that also wrap
Navigation positional device is included, the navigation positional device includes transportation by driving navigation software, deep water TT＆C system, the method survey of stern end measurement tower system
Control system, main interface real-time display tube coupling to be pacified and has pacified tube coupling information.
7. a kind of immersed tube sinking interconnection method, which is characterized in that using a kind of immersed tube mooring as described in claim 1-6 is any
The pre- tensioning system of anchor system is installed, immersed tube sinking interconnection method includes the following steps；
Step 1: according to tube coupling co-ordinate position information to be pacified, installation ship moored position coordinate information is calculated, and then obtain mooring anchor
The location information that casts anchor of each mooring line in system；
Step 2: each mooring line is unmoored again, the installation ship is believed according to moored position coordinate in step 1
Breath, casts anchor respectively to each mooring line；
Step 3: hawser on winch on each mooring line of connection and installation ship in tensioning apparatus, until by all moorings
Line is finished with the connection of corresponding winch；
Step 4: after peace tube coupling is moved to immersed tube position, installation ship is connected with each other with tube coupling to be pacified；
Step 5: the hawser of each winch of tightening；
Step 6: pre- tensioning is carried out to the hawser on all winches, each winch hawser above shown according to the display device
The prestressing force at place, control device controling adjustment device adjust the prestretching angle, stress size, cable of hawser on each winch
Rope length degree and cable releasing speed parameter, until the co-ordinate position information of installation ship and tube coupling coordinate bit confidence to be pacified in the step 1
Breath matches, and the tube coupling to be pacified is adjusted to the coordinate position for waiting for sinking at this time；
Step 7: starting tube coupling sinking to be pacified, completing tube coupling sinking to be pacified and being docked with tube coupling has been pacified.
8. a kind of immersed tube sinking interconnection method according to claim 7, which is characterized in that use two in the step 1
Installation ship, each installation ship include being connected to four mooring lines around it.
9. a kind of immersed tube sinking interconnection method according to claim 8, which is characterized in that each the installation ship includes
Four mooring lines are arranged two-by-two respectively in the left and right sides of installation ship.
10. a kind of immersed tube sinking interconnection method according to claim 7, which is characterized in that installation ship in the step 6
On all winches using successively carrying out prestretching angle, stress size, cable length and cable laying to corresponding mooring line one by one
The adjusting of speed parameter when the prestressing force of the mooring line reaches requirement, then carries out the pre- tensioning of second mooring line.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109930618A (en) * | 2019-01-28 | 2019-06-25 | 中建地下空间有限公司 | Pipe-sinking device is determined in a kind of fixed anchoring |
| CN110588889A (en) * | 2019-08-09 | 2019-12-20 | 中交天和机械设备制造有限公司 | Anchoring and positioning system and method for deep mixing vessel |
| CN113338338A (en) * | 2021-06-18 | 2021-09-03 | 中交四航局第二工程有限公司 | Steel shell immersed tube floating pouring method |
| CN114281117A (en) * | 2022-03-04 | 2022-04-05 | 交通运输部天津水运工程科学研究所 | Anchoring device and method capable of finely regulating initial tension of mooring rope for mooring test |
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| CN208815567U (en) * | 2018-06-29 | 2019-05-03 | 中交第一航务工程局有限公司 | A kind of immersed tube mooring installation pre- tensioning system of anchor system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103898923A (en) * | 2012-12-31 | 2014-07-02 | 中交第一航务工程局有限公司 | Pipe joint lifting immersed system and method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109930618A (en) * | 2019-01-28 | 2019-06-25 | 中建地下空间有限公司 | Pipe-sinking device is determined in a kind of fixed anchoring |
| CN109930618B (en) * | 2019-01-28 | 2024-03-12 | 中建地下空间有限公司 | Fixed immersed tube device of anchor |
| CN110588889A (en) * | 2019-08-09 | 2019-12-20 | 中交天和机械设备制造有限公司 | Anchoring and positioning system and method for deep mixing vessel |
| CN113338338A (en) * | 2021-06-18 | 2021-09-03 | 中交四航局第二工程有限公司 | Steel shell immersed tube floating pouring method |
| CN114281117A (en) * | 2022-03-04 | 2022-04-05 | 交通运输部天津水运工程科学研究所 | Anchoring device and method capable of finely regulating initial tension of mooring rope for mooring test |
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