CN106394810A - Dynamic penetration anchor plate-based ultimate penetration depth determination device - Google Patents
Dynamic penetration anchor plate-based ultimate penetration depth determination device Download PDFInfo
- Publication number
- CN106394810A CN106394810A CN201610919888.8A CN201610919888A CN106394810A CN 106394810 A CN106394810 A CN 106394810A CN 201610919888 A CN201610919888 A CN 201610919888A CN 106394810 A CN106394810 A CN 106394810A
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- China
- Prior art keywords
- anchor slab
- anchor plate
- anchor
- feeler lever
- dynamic driving
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B21/00—Tying-up; Shifting, towing, or pushing equipment; Anchoring
- B63B21/24—Anchors
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Geophysics And Detection Of Objects (AREA)
Abstract
The invention discloses a dynamic penetration anchor plate-based ultimate penetration depth determination device. The device comprises two parts. One part refers to a dynamic penetration anchor plate feeler lever (1) and the other part comprises shear pins (2), an anchor plate sleeve (3) and an anchor plate suction claw (4). The upper part of the anchor plate feeler lever (1) is connected with a termination cap (7) used for installing and probing a searching rope (8), the anchor plate sleeve (3) is positioned in the middle of the anchor plate suction claw (4), the anchor plate sleeve (3) and the anchor plate suction claw (4) are fixed through welding to form a deck, the shear pins (2) are positioned at the two ends of the anchor plate sleeve (3) and used for connecting and fixing the feeler lever (1) to the anchor plate sleeve (3), and the anchor plate feeler lever (1) penetrates the anchor plate sleeve (3). The correlation is more reliable. By applying the method, the dynamic penetration anchor plate-based ultimate penetration depth determination device has the characteristics of being in situ, rapid, accurate, economical and the like. Fast and effective test parameters are provided for survey design and construction of marine geotechnical engineering.
Description
Technical field
The present invention relates to a kind of method that final insert depth is determined based on dynamic driving anchor slab, belong to ocean Geotechnical Engineering
In field, a kind of new anchor slab is finally dynamically embedded into depth test method.
Background technology
Need anchor system in the oil and natural gas facility of deep water float, do not require nothing more than and can bear very high load,
And want economy, install convenient, deep-water installations use typically berths or (dragging embedded) Vertical loading anchor slab or suction
Power caisson, the appearance of Floating Liquefied Natural Gas facility will make the related line load that berths increase, and this is accomplished by higher-quality
Anchor technology, such as suction caisson and some efficient anchor concepts.Dynamic installation is as shorter, in this respect in the torpedo stake set-up time
There is advantage, but they provide relatively low carryings and weight ratio, this mean that they must improve required for
Bearing capacity, but affected with operation by cost.Vertical load plate anchor is installed by dragging, drives, or uses suction caisson,
There is provided a big carrying-weight ratio, these are all effective ground treatment technologies, but have individual shortcoming to be exactly to be difficult to install, especially
When it is that they pull embedded.
Prediction certain depth plate anchor bearing capacity be relatively simple because it be this place undrained shear strength,
Plate projected area and the function of a nondimensional bod -ng faCW, but for anchor installation path and last insert depth be
It is difficult to determine, challenge is higher, need to determine accurate shear strength data in extensive seabed footprint.The installation operation of anchor becomes
Must become increasingly complex, time-consuming, increase with depth in injection water, cost also increases.
One relatively new anchor concept, abbreviation dynamic driving anchor slab (DEPLA), excellent in conjunction with the installation of the dynamic anchor installed
Gesture and the advantage with Vertical loading plate anchor bearer cap.This DEPLA includes a moveable central shaft or " feeler lever ", and one
Four, set is arranged on cylindrical sleeves, and is connected with follower with shear pin.DEPLA is arranged on other dynamic installation anchors, passes through
Certain altitude release anchor above sea level, by with the velocity shock sea bed close to its terminal velocity, subsequent injection seabed sinks anchor
Long-pending thing.When DEPLA is static in seabed, feeler lever retrieval line is strained.This will lead to shear pin separation (not have in knockout process
In the case of being damaged), feeler lever leaves the anchor fluke being vertically embedded in seabed, and next installation is found in retrieval.These embedded anchor fluke structures
Become the bearing unit of plate anchor.When enough loads are in mooring, the direction of the rotation of this plate or " key " is approximately perpendicular to loading direction
Eyelet, makes the load-carrying properties of plate all call, and bearing capacity increases.
The present invention is based on dynamic driving anchor slab (DEPLA), and proposing final insert depth Forecasting Methodology is significantly,
So that exploration process easily and fast, accurately, economical, provide effective and rapid low cost for the design of ocean exploration of geotechnical engineering, construction
Honest and clean test parameter.
Content of the invention
Technical problem：The technical problem to be solved in the present invention is the oil and natural gas facility for floating in ocean deepwater
Anchor system time-consuming, high cost, the problems such as test is inaccurate, propose a kind of embed based on dynamic driving anchor slab and its finally
Depth determines device.The collection of data, process, storage work can voluntarily be carried out using this test device.Can also quickly have
Effect ground determines final insert depth, and the construction for the anchor system of marine resource production facility provides convenient, favourable Yu Haiyang money
The development in source and the development of ocean Geotechnical Engineering.
Technical scheme：The invention discloses a kind of determine device based on dynamic driving anchor slab and its final insert depth, should
Device includes two parts,
A part is dynamic driving anchor slab feeler lever, anchor slab feeler lever top and installation and probe into the termination cap of retrieval rope and connect
Connect；
Another part deck includes shear pin, anchor slab set, anchor slab suction pawl；Anchor slab set is located at anchor slab and inhales in the middle of pawl, they it
Between by being welded and fixed, form deck；Shear pin is located at anchor slab and covers two ends, for feeler lever and the anchor slab set of being connected；
Anchor slab feeler lever is from anchor slab set through the anchor slab feeler lever probe other end is connected with anchor slab set, and anchor slab is inhaled pawl and is provided with
Eyelet, mooring rope and anchor slab are inhaled ZHUANLIAN and are connect by eyelet.
Preferably, anchor slab feeler lever is solid waterproof aluminium-alloy pipe, a length of 185mm, a diameter of 42mm.
Preferably, anchor slab feeler lever top is empty, is provided with six degree of freedom inertia test cell (IMU).
Preferably, six degree of freedom inertia test cell includes the rate gyro unit of one 16 section three part MEMS assemblies
With the 3 axis MEMS accelerometer of 13 and the card of data record.
Preferably, in six degree of freedom inertia test cell (IMU), gyroscope resolution is 0.07 °/s., and measuring range is
+/-2000°/s；Accelerometer resolution is 0.04m/s2, test scope is +/- 16g.
Preferably, mooring rope and retrieval rope are Di Nima rope, and diameter range is in 10-18mm.
Beneficial effect：The present invention solves the existing anchor system consumption of the oil and natural gas facility of floating in ocean deepwater
Duration, high cost, the problems such as test is inaccurate, have easily and fast, accurately, low cost the features such as, and voluntarily carry out data
Collect, process, store work.There is provided effective and rapid economic test parameter for the design of coastal waters exploration of geotechnical engineering, construction, favorably
The development of Yu Haiyang resource and the development of ocean Geotechnical Engineering.
Brief description
Fig. 1 is the dynamic driving plate anchor device figure of the present invention；
Wherein have：Dynamic driving anchor slab feeler lever 1, shear pin 2, anchor slab set 3, anchor slab inhales pawl 4, eyelet 5, mooring rope
6, termination cap 7, install and probe into retrieval rope 8.
Fig. 2 is dynamic driving single unit system figure of the present invention；
Wherein have：Crane 9, barge 10, plate line 11, winch 12, pulley 13, high-speed camera 14, follow line
15.
Specific embodiment
One kind of the present invention is based on dynamic driving anchor slab and its final insert depth determines device, and this device includes two
Point,
A part is dynamic driving anchor slab feeler lever 1, anchor slab feeler lever 1 top and installation and the termination cap 7 probeing into retrieval rope 8
Connect；
Another part deck includes shear pin 2, anchor slab set 3, anchor slab suction pawl 4；Anchor slab set 3 is located at anchor slab and inhales in the middle of pawl 4, it
Between by being welded and fixed, form deck；Shear pin 2 is located at anchor slab and covers 3 two ends, for feeler lever 1 and the anchor slab set of being connected
3；
Anchor slab feeler lever 1 passes through from anchor slab set 3, and the anchor slab feeler lever 1 probe other end is connected with anchor slab set 3, and anchor slab is inhaled on pawl 4
It is provided with eyelet 5, mooring rope 6 and anchor slab are inhaled pawl 4 and be connected by eyelet 5.
Anchor slab feeler lever 1 is solid waterproof aluminium-alloy pipe, a length of 185mm, a diameter of 42mm.
Anchor slab feeler lever 1 top is empty, is provided with six degree of freedom inertia test cell (IMU).
Six degree of freedom inertia test cell includes one 16 rate gyro unit saving three part MEMS assemblies and one
The 3 axis MEMS accelerometer of 13 and the card of data record.
In six degree of freedom inertia test cell (IMU) gyroscope resolution be 0.07 °/s., measuring range be 2000 ° of +/-/
s；Accelerometer resolution is 0.04m/s2, test scope is +/- 16g.
Mooring rope 6 and retrieval rope 8 are Di Nima rope, and diameter range is in 10-18mm.
The final insert depth of anchor slab is according to law of conservation of energy, analyzes process of dynamic penetration based on actual measureed value of acceleration, false
Determine anchor point insert depth zE, tip, by iterative method inverse close to reference value.Dependency relation is more reliable, using the method, has
In situ, quickly the features such as, accurate, economical.There is provided efficiently and effectively test parameter for the design of ocean exploration of geotechnical engineering, construction.
It is arranged on after six degree of freedom inertia test cell (IMU) charging in dynamic driving anchor slab feeler lever during test, then
Dynamic driving anchor slab is installed above deck, passes through anchor slab to inhale pawl by reducing anchor slab feeler lever, with shearing pin connection feeler lever and suction
Pawl.Anchor is reduced in water to required falling height, is then released through and opens the fast rapid release connecting feeler lever retrieval rope and winch
Put lock so that anchor free-falling, injection seabed.Anchor point insert depth, zE, tipBy sending a remote control high-speed camera
Machine to detect the labelling on feeler lever retrieval rope to sea bed.With dynamic injection, load cell and a series of capstan winch line and feeler lever
Retrieval rope connects, and the lifting speed of winch is 30mm/s.The motion of feeler lever inhales, with respect to plate anchor, the destruction that pawl causes shear pin, this
Sample allows feeler lever to be retrieved on boat deck.Plate anchor mooring line is then attached to cable reel with draught line sensor parallel in electricity
Cable winch is monitoring the displacement of rope.Enter the vertical loading of andante using winch, cause mooring line movement to move with the speed of 30m/s
Dynamic, until dynamic driving anchor slab is retrieved from seabed, again recover on a ship 's.
Anchor slab feeler lever is solid waterproof aluminium-alloy pipe, a length of 185mm, a diameter of 42mm.
Anchor slab feeler lever top is empty, is provided with six degree of freedom inertia test cell (IMU).
Six degree of freedom inertia test cell (IMU) includes the speed of one 16 section three part MEMS (MEMS) assemblies
Gyro (ITG 3200) and the 3 axis MEMS accelerometer (ADXL 345) of 13 and (SD) card of data record.
In six degree of freedom inertia test cell (IMU) gyroscope resolution be 0.07 °/s, measuring range be 2000 ° of +/-/
S. accelerometer resolution is 0.04m/s2, test scope is +/- 16g.
Mooring rope 6 and retrieval rope 8 are Di Nima rope, and diameter range is in 10-18mm.
Using law of conservation of energy it is assumed that anchor point insert depth zE, tip, by iteration inverse close to reference value, it is then determined that
Final insert depth, by integrated acceleration numerical computations, its gross energy relational expression is expressed as speed：
The relational expression of reference value is as follows：
In formula, m is the gross mass of anchor, and m ' is the effective mass (in embedded soil) of anchor；deff=(4Af/π)0.5；AfFor always just
Face area (anchor axle and anchor fluke)；K is the impact coefficient of native intensity gradient.
In the case of given design load, dynamic driving anchor slab is predicted to the alternative manner of insert depth is specific as follows：
1st, suppose the size of an overall anchor, given anchor quality is m and geometry, the impact velocity of anchor can calculate logical
Cross the given anchor release altitude of anchor and use following equations：
md2s/dt2=Ws-Fd
WsIt is submerged in the weight in water, F for anchordFor drag force, it is calculated as follows：
Wherein CdFor the dragging coefficient of anchor, typically take 0.7, ρsFor native density, AfFor the front face area of anchor, v is the conjunction of anchor
Speed,
2nd, suppose that anchor point insert depth is zE, tip, total energy balane following relationship, impact velocity can be by acceleration
Numerical integration obtains, and its relational expression is expressed as：
3rd, the size of adjustment anchor and anchor point depth of penetration are until zE, tip/deffWith Etotal/kdeff 4Composition of relations is located at prediction
K and α required for solving on line.Wherein α is the friction ratio at interface.
4th, use following equations computing board anchor to embed due to artificial manipulation loss, to determine final plate insert depth
zE, plate
5th, select a bearing capacity factor N from following relationshipc：
Work as zE, platDuring e/D >=2.5, Nc=14.9；
Work as zE, plateDuring/D≤2.5,Su is undrained shear strength, and γ ' is having of soil
Effect severe,
6th, calculate what till soleplate buried depth anchor force was flooded in soil using bearing capacity factor fixed in step 5 and anchor
Weight.
7th, repeat step 1-6 is until that anchor bearing capacity is at least worth with required design load is equal.
The present invention solves in ocean deepwater the existing anchor system of the oil and natural gas facility of floating, and time-consuming, cost
Height, the problems such as test is inaccurate, can easily and fast, accurately, measure the engineering mechanics property of seabed ultra-soft soil at low cost,
And voluntarily carry out the collection of data, process, storage work.There is provided effective and rapid warp for the design of coastal waters exploration of geotechnical engineering, construction
The test parameter of Ji.
Claims (6)
1. based on dynamic driving anchor slab and its final insert depth determines device it is characterised in that this device includes two for one kind
Point,
A part is dynamic driving anchor slab feeler lever (1), anchor slab feeler lever (1) top and installation and the termination probeing into retrieval rope (8)
Cap (7) connects；
Another part deck includes shear pin (2), anchor slab set (3), anchor slab suction pawl (4)；Anchor slab set (3) is located at anchor slab and inhales pawl (4)
Centre, passes through between them to be welded and fixed, forms deck；Shear pin (2) is located at anchor slab set (3) two ends, for the spy that is connected
Bar (1) and anchor slab set (3)；
Anchor slab feeler lever (1) passes through from anchor slab set (3), and anchor slab feeler lever (1) the probe other end is connected with anchor slab set (3), and anchor slab is inhaled
Pawl (4) is provided with eyelet (5), and mooring rope (6) and anchor slab are inhaled pawl (4) and be connected by eyelet (5).
2. according to claim 1 device is determined based on dynamic driving anchor slab and its final insert depth it is characterised in that
Anchor slab feeler lever (1) is solid waterproof aluminium-alloy pipe, a length of 185mm, a diameter of 42mm.
3. according to claim 1 and 2 device is determined based on dynamic driving anchor slab and its final insert depth, its feature exists
In anchor slab feeler lever (1) top is empty, is provided with six degree of freedom inertia test cell.
4. according to claim 1 and 2 device is determined based on dynamic driving anchor slab and its final insert depth, its feature exists
Include the rate gyro unit of one 16 section three part MEMS assemblies and one 13 in, six degree of freedom inertia test cell
3 axis MEMS accelerometer and the card of data record.
5. according to claim 1 or 2 or 3, device is determined based on dynamic driving anchor slab and its final insert depth, it is special
Levy and be, in six degree of freedom inertia test cell, gyroscope resolution is 0.07 °/s., measuring range is 2000 °/s of +/-；Accelerate
Degree score resolution is 0.04m/s2, test scope is +/- 16g.
6. according to claim 1 device is determined based on dynamic driving anchor slab and its final insert depth it is characterised in that
Mooring rope (6) and retrieval rope (8) are restricted for Di Nima, and diameter range is in 10-18mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610919888.8A CN106394810A (en) | 2016-10-21 | 2016-10-21 | Dynamic penetration anchor plate-based ultimate penetration depth determination device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610919888.8A CN106394810A (en) | 2016-10-21 | 2016-10-21 | Dynamic penetration anchor plate-based ultimate penetration depth determination device |
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| Publication Number | Publication Date |
|---|---|
| CN106394810A true CN106394810A (en) | 2017-02-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610919888.8A Pending CN106394810A (en) | 2016-10-21 | 2016-10-21 | Dynamic penetration anchor plate-based ultimate penetration depth determination device |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107985516A (en) * | 2017-12-15 | 2018-05-04 | 重庆大学 | A kind of flank extension type dynamic driving anchor |
| CN108677986A (en) * | 2018-05-16 | 2018-10-19 | 福州大学 | Technology of Deepwater Mooring System body and its construction technology |
| CN108891533A (en) * | 2018-06-29 | 2018-11-27 | 合肥学院 | A kind of rotatable torpedo anchor of empennage |
| CN110595918A (en) * | 2019-10-25 | 2019-12-20 | 安徽理工大学 | Dynamic and static coupling loading anchoring body test device |
| CN111055969A (en) * | 2019-12-05 | 2020-04-24 | 天津大学前沿技术研究院有限公司 | Power injection anchor with punching semicircular anchor wing and capable of enhancing in-place bearing capacity |
| CN113026707A (en) * | 2021-03-22 | 2021-06-25 | 浙江大学 | Power penetration flat plate anchor test device for hypergravity centrifugal machine |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107985516A (en) * | 2017-12-15 | 2018-05-04 | 重庆大学 | A kind of flank extension type dynamic driving anchor |
| CN108677986A (en) * | 2018-05-16 | 2018-10-19 | 福州大学 | Technology of Deepwater Mooring System body and its construction technology |
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| CN108891533A (en) * | 2018-06-29 | 2018-11-27 | 合肥学院 | A kind of rotatable torpedo anchor of empennage |
| CN110595918A (en) * | 2019-10-25 | 2019-12-20 | 安徽理工大学 | Dynamic and static coupling loading anchoring body test device |
| CN110595918B (en) * | 2019-10-25 | 2024-03-29 | 安徽理工大学 | Dynamic and static coupling loading anchor body test device |
| CN111055969A (en) * | 2019-12-05 | 2020-04-24 | 天津大学前沿技术研究院有限公司 | Power injection anchor with punching semicircular anchor wing and capable of enhancing in-place bearing capacity |
| CN113026707A (en) * | 2021-03-22 | 2021-06-25 | 浙江大学 | Power penetration flat plate anchor test device for hypergravity centrifugal machine |
| CN113026707B (en) * | 2021-03-22 | 2022-04-01 | 浙江大学 | Power penetration flat plate anchor test device for hypergravity centrifugal machine |
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Application publication date: 20170215 |