CN107034931A - Steel-pipe pile testing apparatus for verticality and deep water steel pipe pile construction method - Google Patents
Steel-pipe pile testing apparatus for verticality and deep water steel pipe pile construction method Download PDFInfo
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- CN107034931A CN107034931A CN201710311703.XA CN201710311703A CN107034931A CN 107034931 A CN107034931 A CN 107034931A CN 201710311703 A CN201710311703 A CN 201710311703A CN 107034931 A CN107034931 A CN 107034931A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D33/00—Testing foundations or foundation structures
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2600/00—Miscellaneous
- E02D2600/10—Miscellaneous comprising sensor means
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- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
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- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
Abstract
The present invention provides a kind of steel-pipe pile testing apparatus for verticality, and it includes locating rack, lining rope and ball float, and locating rack is fixedly connected with one end of lining rope, and the other end of lining rope is fixedly connected with ball float.Construction method, comprises the following steps：Floating platform is set up, steel-pipe pile is installed using leading truck, multiple bolt cable rings are circumferentially installed in outer wall of the steel-pipe pile close to bottom；Steel-pipe pile testing apparatus for verticality is put into steel-pipe pile；The perpendicularity information returned according to steel-pipe pile testing apparatus for verticality, the perpendicularity of steel-pipe pile is adjusted with steel-pipe pile hawser；Steel-pipe pile is set under the constraint of steel-pipe pile hawser, until reaching projected depth；By above step, on the basis of steel pipe pile verticality is ensured, complete steel-pipe pile sets construction.Scheme more than, testing apparatus for verticality can not be influenceed by the depth of water, Real-time Feedback perpendicularity information, to help steel-pipe pile during setting, it can be ensured that perpendicularity meets the requirements, and improve construction precision.
Description
Technical field
The present invention relates to steel-pipe pile construction field, particularly a kind of steel-pipe pile testing apparatus for verticality and using this steel pipe
The steel pipe pile construction method of pile verticality detection means.
Background technology
The selection of pile foundation construction process directly determines duration and the cost of bridge construction, whole project is played conclusive
Effect.The depth of water is larger in current science of bridge building, shallow overburden pile foundation construction considers that fixed platform sets up difficulty greatly, cost
Height, general use is floating platform+impact drill construction method.
For example in Chinese patent literature, CN 102312442 described in, a kind of construction method of trestle steel pipe pile foundation,
Anchoring for carrying out trestle steel pipe pile foundation on rivers, lake or the inclined uncovered rock of ocean face, shallow overburden inclined rock base
Construction, comprises the following steps：A10, floating pilot hole platform is accurately positioned using anchorage system after, pass through floating respectively
Each predetermined hole position on pilot hole platform will drop down onto riverbed scar under every trestle steel pipe pile, but consolidate without entering rock anchor；
A20, be slightly less than using diameter the drill hammer of trestle steel pipe pile internal diameter in trestle steel pipe pile to bedding scar impact holing extremely
After projected depth, by trestle steel pipe pile vibration-sunk with proceeding to bottom hole, armored concrete is irrigated, trestle steel pipe pile is consolidated with basement rock
Knot；A30, welding trestle steel pipe pile connection system complete steel pipe pile foundation construction.The present invention, is applied using " drilled pile+steel-pipe pile "
Work, can effectively resist the effect of current, stormy waves and wind load, it is ensured that stabilization and the structure safety of trestle.But actually applying
During work, the scheme of steel pipe pile verticality is controlled using leading truck, with the increase of the depth of water its precision worse and worse, such as water
After deeply more than 10 meters, existing leading truck is then difficult to meet requirement of the construction quality to perpendicularity, particularly to prefabricated cushion cap
Or high stake box bed die is installed to form big interference, be this at this stage general high stake box larger opening has been reserved in stake week,
Blocked after in place using geomembrane enveloped concrete.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of steel-pipe pile testing apparatus for verticality, can be sufficiently long
In the range of the perpendicularity of steel-pipe pile is detected, so as to provide perpendicularity correction nuclear information, side preferably for the construction of steel-pipe pile
In case, the acquisition perpendicularity information that can be automated.
Another technical problem to be solved by this invention is to provide a kind of deep water steel pipe pile construction method, can make deep water bar
Steel pipe pile driving construction under part, it is ensured that perpendicularity meets construction requirement, and it is more convenient to construct.
In order to solve the above technical problems, the technical solution adopted in the present invention is：A kind of steel-pipe pile testing apparatus for verticality,
It includes locating rack, lining rope and ball float, and locating rack is fixedly connected with one end of lining rope, and the other end of lining rope is fixed with ball float to be connected
Connect.
It is preferred that scheme in, the inwall of locating rack and steel-pipe pile is slidably matched, the position that locating rack is connected with lining rope, is located at
The central point of locating rack end face.
It is preferred that scheme in, the top of ball float be provided with vertical measuring staff.
It is preferred that scheme in, be additionally provided with positioning rope, positioning rope is fixedly connected with locating rack, the placement for limiting locating rack
Depth；
Locating rack subtracts the weight after buoyancy, more than or equal to the buoyancy of ball float.
It is preferred that scheme in, stopping means is provided with positioning rope, stopping means is fixed on the suitable for reading or ground of steel-pipe pile.
It is preferred that scheme in, described stopping means includes the body of rod, and one end of the body of rod is provided with guide ring, and the other end is provided with lock
Determine ring, locking ring is provided with hold-down bolt；
Body of rod two ends are provided with the fixing device suitable for reading or ground for being used for being fixed on steel-pipe pile；
Positioning rope passes through guide ring, and with passing through locking ring after the circle of body of rod winding at least one.
It is preferred that scheme in, in ball float be provided with angular transducer；
Battery, master control set and wireless base station apparatus are provided with locating rack；
Angular transducer is electrically connected with the input of master control set, and the output end of master control set is electrically connected with wireless base station apparatus,
Battery is electrically connected with master control set.
It is preferred that scheme in, described angular transducer is obliquity sensor or gyroscope.
It is preferred that scheme in, in described locating rack, the two ends of cylinder are provided with end plate, in the outer wall at cylinder two ends provided with leading
Xiang Huan.
A kind of steel pipe pile construction method using above-mentioned steel-pipe pile testing apparatus for verticality, comprises the following steps：
S1, floating platform is set up, by floating platform anchor and position；
S2, the plan-position in floating platform measurement and positioning steel tube stake, install leading truck；
S3, using leading truck install steel-pipe pile, multiple bolt cable rings, steel-pipe pile are circumferentially installed in outer wall of the steel-pipe pile close to bottom
Hawser is connected with bolt cable ring, assembled spreading steel-pipe pile, until the bottom contact ground of steel-pipe pile；
S4, steel-pipe pile testing apparatus for verticality is put into steel-pipe pile；
S5, the perpendicularity information returned according to steel-pipe pile testing apparatus for verticality, the vertical of steel-pipe pile is adjusted with steel-pipe pile hawser
Degree；
S6, under the constraint of steel-pipe pile hawser steel-pipe pile is set, until reaching projected depth；
By above step, on the basis of steel pipe pile verticality is ensured, complete steel-pipe pile sets construction.
Steel-pipe pile testing apparatus for verticality and deep water steel pipe pile construction method that the present invention is provided, the side more than
Case, testing apparatus for verticality can not be influenceed by the depth of water, Real-time Feedback perpendicularity information, to help steel-pipe pile setting process
In, it can be ensured that perpendicularity meets the requirements, and improves construction precision, and the apparatus structure of the present invention is simple, operation facility, safely may be used
Lean on.
Brief description of the drawings
The invention will be further described with reference to the accompanying drawings and examples：
Fig. 1 is the structural representation of apparatus of the present invention.
Fig. 2 is Fig. 1 overlooking the structure diagram.
Fig. 3 is the structural representation of floating platform in the present invention.
Fig. 4 is the structural representation of floating platform and leading truck in the present invention.
Fig. 5 sets structural representation during construction for steel-pipe pile in the present invention.
Fig. 6 is the cross-sectional view of the bolt cable ring position of steel-pipe pile in the present invention.
Fig. 7 sets construction process schematic diagram for steel-pipe pile in the present invention.
Fig. 8 is the preferred structure schematic diagram of apparatus of the present invention.
Fig. 9 is the close-up schematic view of apparatus of the present invention.
Figure 10 is the structural representation of stopping means in the present invention.
In figure：Locating rack 1, cylinder 101, locating ring 102, end plate 103, lining rope 2, ball float 3, steel-pipe pile 4, positioning rope 5, limit
Position device 6, fixing device 61, the body of rod 62, guide ring 63, locking ring 64, hold-down bolt 65, tabletting 66, angular transducer 7 is surveyed
Bar 8, battery 9, master control set 10, wireless base station apparatus 11, wire 12, floating platform 13, platform hawser 14, leading truck 15,
Bolt cable ring 16, steel-pipe pile hawser 17.
Embodiment
Embodiment 1：
As in Fig. 1 ~ 10, a kind of steel-pipe pile testing apparatus for verticality, it includes locating rack 1, lining rope 2 and ball float 3, locating rack 1 with
One end of lining rope 2 is fixedly connected, and the other end of lining rope 2 is fixedly connected with ball float 3.Thus structure, is needing to detect perpendicularity
When, testing apparatus for verticality is lifted in steel-pipe pile 4, the submerged of locating rack 1, ball float 3 is floated by the buoyancy of water, will
Lining rope 2 is stretched, due to buoyancy and gravity reaction force each other, when steel-pipe pile 4 is heeling condition, the position where ball float 3
The center line of steel-pipe pile 4 can be deviateed, so as to draw the heeling error of steel-pipe pile 4.As shown in Figure 8.According to bank error, apply
Workman person can be conveniently adjusted the plumbness of steel-pipe pile 4.
It is preferred that scheme in, the inwall of locating rack 1 and steel-pipe pile 4 is slidably matched, the position that locating rack 1 is connected with lining rope 2,
Positioned at the central point of the end face of locating rack 1.Thus structure, further improves accuracy of detection of the ball float 3 for the error of perpendicularity.It is preferred that
, mark is set at the top of ball float 3, in order to compare.
In further preferred scheme such as Fig. 9, in described locating rack 1, the two ends of cylinder 101 are provided with end plate 103, in cylinder
The outer wall at the two ends of body 101 is provided with guide ring 102.The material of guide ring 102 uses polytetrafluoroethylene (PTFE) material, and thus structure, is easy to
Ensure that locating rack 1 is located at the position of central point, improve positioning precision, while also allowing for sliding up and down locating rack 1 smooth.
Further preferred scheme is provided with vertical measuring staff 8 as shown in Fig. 8,9 at the top of ball float 3.When ball float is located at
When on the water surface, it is easy to observation, but ball float is easily influenceed on the water surface by the component that horizontal plane applies, and ball float is had drive
Neutrality, influences measurement accuracy, and ball float 3 is entirely located in underwater with higher measurement accuracy, but exists and be not easy to see
The problem of examining, by setting vertical measuring staff 8 at the top of ball float 3, makes exposing outside the water surface for the part of measuring staff 8, can solve
Never it is easy to the defect of observation.It is preferred that, ball float 3 and measuring staff 8 use blown polyurethane materials.
It is preferred that scheme such as Fig. 8,9 in, be additionally provided with positioning rope 5, positioning rope 5 is fixedly connected with locating rack 1, it is fixed for limiting
The placement depth of position frame 1；
Locating rack 1 subtracts the weight after buoyancy, more than or equal to the buoyancy of ball float 3.Thus structure, is easy to control locating rack 1 to exist
Submergence depth in steel-pipe pile 4.It is preferred that scheme such as Fig. 9 in, positioning rope 5 is fixedly mounted on the position close to the edge of locating rack 1,
In case positioning rope 5 causes interference to lining rope 2 and ball float 3.In further preferred scheme, positioning rope 5 has many, circumferentially
Cloth, thus structure, makes the holding level in detection process of locating rack 1.
It is preferred that scheme in, on positioning rope 5 be provided with stopping means 6, stopping means 6 be fixed on the suitable for reading of steel-pipe pile 4 or
Ground.Thus structure, is easy to control the length of positioning rope 5, so that locating rack 1 sinks in place.Stopping means 6 can be with
Conventional fixture, such as spring clip, or similar hoist engine rod member.
It is preferred that scheme such as Figure 10 in, described stopping means 6 includes the body of rod 62, and one end of the body of rod 62 is provided with guide ring
63, the other end is provided with locking ring 64, and locking ring 64 is provided with hold-down bolt 65；
The two ends of the body of rod 62 are provided with the fixing device 61 suitable for reading or ground for being used for being fixed on steel-pipe pile 4；Fixing device 61 can be
Hook structure is used in the structures such as hook, screw base, this example.
Positioning rope 5 passes through guide ring 63, and with passing through locking ring 64 after the body of rod 62 winds at least one circle, and it is compacted spiral shell
Bolt 65 is locked, and the tabletting 66 of arc is provided with the termination of hold-down bolt 65, to avoid damaging by pressure positioning rope 5.Thus structure, Neng Goufang
Just reliably limit positioning rope 5 and broadcast length.
It is preferred that scheme such as Fig. 9 in, angular transducer 7 is provided with the ball float 3；It is preferred that scheme in, described angle is passed
Sensor 7 is obliquity sensor or gyroscope.In the scheme of obliquity sensor, obliquity sensor is two groups, orthogonal arrangement,
X, the inclination angle of Y-axis are detected respectively, it is preferred that the setting angle of obliquity sensor and the installation such as the steel-pipe pile hawser 17 in Fig. 6
Direction is consistent.Gyroscope, which only needs one group, can obtain obliquity information.Selected according to the demand of engineering, generally in equal fee condition
Under, the precision of obliquity sensor is higher.
Battery 9, master control set 10 and wireless base station apparatus 11 are provided with locating rack 1；
Angular transducer 7 is electrically connected with the input of master control set 10, output end and the wireless base station apparatus 11 of master control set 10
Electrical connection, battery 9 is electrically connected with master control set 10.The signal that angular transducer 7 is obtained is sent after amplification to master control dress
Put in 10, master control set 10 is sent to the workmen on ground after being converted into data signal by wireless base station apparatus 11, from
And obtain the detection data of testing apparatus for verticality.Using the program, measurement error can be reduced, workmen is reduced and frequently sees
The step of examining ball float position, and it is also convenient for the length of workmen's synergic adjustment steel-pipe pile hawser 17.
Embodiment 2：
Such as scheme a kind of steel pipe pile construction method using above-mentioned steel-pipe pile testing apparatus for verticality, comprise the following steps：
S1, floating platform 13 is set up, by platform hawser 14 by the anchor and position of floating platform 13；
S2, the plan-position in the measurement of floating platform 13 and positioning steel tube stake 4, install leading truck 15；
S3, using leading truck 15 install steel-pipe pile 4, multiple bolt cable rings 16 are circumferentially installed in outer wall of the steel-pipe pile 4 close to bottom,
As shown in Figure 6, in this example by the way of circumferentially uniform four bolt cables ring 16, at a distance of 90 between each bolt cable ring 16
Degree.Correspondingly, four steel-pipe pile hawsers 17 are connected with bolt cable ring 16, assembled spreading steel-pipe pile 4, until the bottom of steel-pipe pile 4 connects
Tread surface；It is preferred that, the distance from bottom a of bolt cable ring 16 and steel-pipe pile 4 is 3 ~ 10 meters, preferably 5 meters.
S4, it is put into steel-pipe pile 4 steel-pipe pile testing apparatus for verticality as described in example 1 above；By measuring for verticality
Device transfers to suitable position, and is fixed with stopping means 6.The side of data is sent using artificial observation or remote auto
Formula, workmen obtains the data of perpendicularity in real time.
S5, the perpendicularity information returned according to steel-pipe pile testing apparatus for verticality, with loosening or tighten up steel in all directions
The mode of the length of pile tube hawser 17 adjusts the perpendicularity of steel-pipe pile 4；
S6, steel-pipe pile 4 is set under the constraint of steel-pipe pile hawser 17, when steel-pipe pile 4 squeezes into ground one end distance, such as 5cm ~
20cm, now the bottom mouth of pipe of steel-pipe pile 4 is spacing by ground, suitably loosens the length of steel-pipe pile hawser 17, until steel-pipe pile 4 dozens
Enter to reach projected depth；
By above step, on the basis of steel pipe pile verticality is ensured, complete steel-pipe pile 4 sets construction.
It is preferred that scheme such as Fig. 7 in, the ball float 3 of steel-pipe pile testing apparatus for verticality, below the water surface, to improve measurement
Precision, locating rack 1 transfers depth close to the bottom of steel-pipe pile 4, and thus structure, further improves measurement accuracy.
The above embodiments are only the preferred technical solution of the present invention, and are not construed as the limitation for the present invention, this Shen
Please in technical characteristic in the case where not conflicting, can mutually be combined.Protection scope of the present invention should be with claim
The equivalents of technical characteristic are protection domain in the technical scheme of record, including the technical scheme of claim record.
Equivalent substitution i.e. within this range is improved, also within protection scope of the present invention.
Claims (10)
1. a kind of steel-pipe pile testing apparatus for verticality, it is characterized in that：It includes locating rack（1）, lining rope（2）And ball float（3）, positioning
Frame（1）With lining rope（2）One end be fixedly connected, lining rope（2）The other end and ball float（3）It is fixedly connected.
2. a kind of steel-pipe pile testing apparatus for verticality according to claim 1, it is characterized in that：Locating rack（1）With steel-pipe pile
（4）Inwall be slidably matched, locating rack（1）With lining rope（2）The position of connection, positioned at locating rack（1）The central point of end face.
3. a kind of steel-pipe pile testing apparatus for verticality according to claim 1, it is characterized in that：In ball float（3）Top set
There is vertical measuring staff（8）.
4. a kind of steel-pipe pile testing apparatus for verticality according to any one of claim 1 ~ 3, it is characterized in that：It is additionally provided with positioning
Rope（5）, positioning rope（5）With locating rack（1）It is fixedly connected, for limiting locating rack（1）Placement depth；
Locating rack（1）The weight after buoyancy is subtracted, more than or equal to ball float（3）Buoyancy.
5. a kind of steel-pipe pile testing apparatus for verticality according to claim 4, it is characterized in that：In positioning rope（5）It is provided with
Stopping means（6）, stopping means（6）It is fixed on steel-pipe pile（4）Suitable for reading or ground.
6. a kind of steel-pipe pile testing apparatus for verticality according to claim 5, it is characterized in that：Described stopping means（6）
Including the body of rod（62）, the body of rod（62）One end be provided with guide ring（63）, the other end is provided with locking ring（64）, locking ring（64）On set
There is hold-down bolt（65）；
The body of rod（62）Two ends, which are provided with, to be used to be fixed on steel-pipe pile（4）Fixing device suitable for reading or ground（61）；
Positioning rope（5）Through guide ring（63）, and in the body of rod（62）With passing through locking ring after the circle of winding at least one（64）.
7. a kind of steel-pipe pile testing apparatus for verticality according to claim 1 ~ 3,5 ~ 6 any one, it is characterized in that：In ball float
（3）It is interior to be provided with angular transducer（7）；
In locating rack（1）It is interior to be provided with battery（9）, master control set（10）And wireless base station apparatus（11）；
Angular transducer（7）With master control set（10）Input electrical connection, master control set（10）Output end and wireless transmission
Device（11）Electrical connection, battery（9）With master control set（10）Electrical connection.
8. a kind of steel-pipe pile testing apparatus for verticality according to claim 1 or 2, it is characterized in that：Described angle sensor
Device（7）For obliquity sensor or gyroscope.
9. a kind of steel-pipe pile testing apparatus for verticality according to claim 1 or 2, it is characterized in that：Described locating rack（1）
In, cylinder（101）Two ends be provided with end plate（103）, in cylinder（101）The outer wall at two ends is provided with guide ring（102）.
10. one kind uses the steel pipe pile construction method of the steel-pipe pile testing apparatus for verticality described in any one of claim 1 ~ 9, its
It is characterized in comprise the following steps：
S1, set up floating platform（13）, by floating platform（13）Anchor and position；
S2, in floating platform（13）Measure and positioning steel tube stake（4）Plan-position, install leading truck（15）；
S3, utilize leading truck（15）Steel-pipe pile is installed（4）, in steel-pipe pile（4）Outer wall close to bottom circumferentially installs multiple bolts
Cable ring（16）, steel-pipe pile hawser（17）With bolt cable ring（16）Connection, assembled spreading steel-pipe pile（4）, until steel-pipe pile（4）Bottom
Contact ground；
S4, in steel-pipe pile（4）Inside it is put into steel-pipe pile testing apparatus for verticality；
S5, the perpendicularity information returned according to steel-pipe pile testing apparatus for verticality, use steel-pipe pile hawser（17）Adjust steel-pipe pile（4）
Perpendicularity；
S6, in steel-pipe pile hawser（17）Constraint under set steel-pipe pile（4）, until reaching projected depth；
By above step, on the basis of steel pipe pile verticality is ensured, steel-pipe pile is completed（4）Set construction.
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|---|---|---|---|
| CN201710311703.XA CN107034931B (en) | 2017-05-05 | 2017-05-05 | Steel pipe pile verticality detection device and deepwater steel pipe pile construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710311703.XA CN107034931B (en) | 2017-05-05 | 2017-05-05 | Steel pipe pile verticality detection device and deepwater steel pipe pile construction method |
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| CN107034931B CN107034931B (en) | 2023-07-14 |
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| CN108344407A (en) * | 2018-04-25 | 2018-07-31 | 中铁大桥局第七工程有限公司 | A kind of deep water steel pile casting testing apparatus for verticality |
| CN108756850A (en) * | 2018-05-23 | 2018-11-06 | 中国电建集团中南勘测设计研究院有限公司 | A kind of device and localization method for Underwater Navigation |
| CN110172972A (en) * | 2019-05-13 | 2019-08-27 | 中国建筑第六工程局有限公司 | A kind of steel-pipe pile construction guiding device |
| CN110593337A (en) * | 2019-10-14 | 2019-12-20 | 中铁第四勘察设计院集团有限公司 | Underwater milling groove guiding and positioning device suitable for deepwater embedded foundation |
| CN112144562A (en) * | 2020-04-22 | 2020-12-29 | 中国海洋大学 | Pile foundation monitoring device for offshore operation platform |
| CN112253092A (en) * | 2020-09-18 | 2021-01-22 | 中国电建集团中南勘测设计研究院有限公司 | Deepwater drilling riser inclination measuring device and measuring method thereof |
| CN113945135A (en) * | 2021-09-30 | 2022-01-18 | 中国一冶集团有限公司 | Multifunctional pile hole measuring device and measuring method thereof |
| CN114059535A (en) * | 2021-11-27 | 2022-02-18 | 湖南省第二工程有限公司 | Construction method for sinking overweight steel casing in deep water area based on buoyancy effect |
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| CN110593337A (en) * | 2019-10-14 | 2019-12-20 | 中铁第四勘察设计院集团有限公司 | Underwater milling groove guiding and positioning device suitable for deepwater embedded foundation |
| CN112144562A (en) * | 2020-04-22 | 2020-12-29 | 中国海洋大学 | Pile foundation monitoring device for offshore operation platform |
| CN112253092A (en) * | 2020-09-18 | 2021-01-22 | 中国电建集团中南勘测设计研究院有限公司 | Deepwater drilling riser inclination measuring device and measuring method thereof |
| CN112253092B (en) * | 2020-09-18 | 2023-11-07 | 中国电建集团中南勘测设计研究院有限公司 | Device and method for measuring gradient of deepwater drilling riser |
| CN113945135A (en) * | 2021-09-30 | 2022-01-18 | 中国一冶集团有限公司 | Multifunctional pile hole measuring device and measuring method thereof |
| CN114059535A (en) * | 2021-11-27 | 2022-02-18 | 湖南省第二工程有限公司 | Construction method for sinking overweight steel casing in deep water area based on buoyancy effect |
| CN115182347A (en) * | 2022-08-16 | 2022-10-14 | 中建港航局集团有限公司 | Pile sinking auxiliary positioning device |
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