CN111780710A - Seabed surface layer deformation sliding long-term observation device and method - Google Patents
Seabed surface layer deformation sliding long-term observation device and method Download PDFInfo
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- CN111780710A CN111780710A CN202010703538.4A CN202010703538A CN111780710A CN 111780710 A CN111780710 A CN 111780710A CN 202010703538 A CN202010703538 A CN 202010703538A CN 111780710 A CN111780710 A CN 111780710A
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Abstract
The invention discloses a long-term observation device and method for deformation and sliding of a seabed surface layer, and belongs to the technical field of seabed observation. The device comprises a central measuring unit and a plurality of auxiliary measuring units, and quantitative data of deformation sliding displacement and sliding direction of the seabed surface layer in a certain area range can be measured through the cooperation of the central measuring unit and the auxiliary measuring units; the method can realize the in-situ long-term observation of the deformation sliding displacement and the direction of the seabed surface sediment, has the characteristics of large-scale measurement, and can measure the regional deformation sliding process of the seabed surface sediment.
Description
Technical Field
The invention relates to the technical field of seabed observation, in particular to a seabed surface layer deformation sliding long-term observation device and method.
Background
The deformation and sliding of the surface layer of the seabed are intuitive phenomena of series of marine geological disasters such as seabed creep, seabed landslide and the like, and can reflect the stable state of seabed slope sediments. However, the stability of the seabed slope sediment is directly related to the safe development of seabed oil and gas resources, and the instability can cause a series of marine geological disaster chains, thereby bringing huge dangers and losses to seabed engineering facilities, particularly important engineering facilities such as oil and gas development platforms, seabed oil and gas pipelines, seabed cables and the like.
The reason for the deformation and sliding of the seabed surface layer is due to the effects of the internal structure and dynamic conditions of the sediment, such as the water content and the clay content of the soft sediment on the seabed or overpressure fluid generated by the decomposition of natural gas hydrate; another aspect is the effect of external conditions such as ergonomic activity, earthquakes, internal waves, etc.
Marine geological disasters such as submarine creep, submarine landslide and the like generally occur with slopes of less than 1 °, and the deformation sliding process of surface sediments of the marine geological disasters can be fine and slow. At present, the sliding observation technology for lateral deformation of seabed sediment of shoal shallow sea is relatively mature at home and abroad, and the sliding observation technology for deformation of seabed surface sediment of an area is rarely researched. The sliding observation of the surface deposit deformation is mostly a qualitative analysis after the occurrence, and is short of quantitative observation of the sliding distance and the sliding direction. At present, no ideal observation method is available for directly acquiring the evolution process of seabed surface sediment deformation and sliding, and the research of disaster mechanisms and the development of monitoring and early warning technologies are severely restricted.
Disclosure of Invention
In order to make up for the defects of the prior art, the invention provides a long-term observation device and method for deformation and sliding of a seabed surface layer.
The technical scheme of the invention is as follows:
a seabed surface layer deformation sliding long-term observation device comprises an indwelling part and a recovery part;
the indwelling part comprises a central measuring unit and a plurality of auxiliary measuring units;
the central measuring unit comprises a suction anchor, a support frame fixed on the suction anchor and a support panel fixed on the support frame from bottom to top, and a stop disc is fixed on the support frame; a plurality of main measuring columns are fixed on the supporting panel and correspond to the auxiliary measuring units one by one;
the main measuring column is internally provided with a measuring rope disc capable of automatically retracting, a measuring opening is formed in the main measuring column, and a displacement measuring unit capable of measuring the moving displacement of the measuring rope and an azimuth measuring unit capable of measuring the moving angle of the measuring rope are arranged at the measuring opening;
the auxiliary measuring unit comprises a gravity anchor and an auxiliary supporting frame fixed on the gravity anchor from bottom to top; an auxiliary stop disc is fixed on the auxiliary support frame; the tail end of the measuring rope in the main measuring column penetrates out of the measuring opening and then is fixed on the auxiliary supporting frame;
the recovery part comprises a floating body material and a main control cabin, the main control cabin penetrates through the floating body material, and a water sound locator and a beacon machine are fixed at the top of the main control cabin; grooves matched with the main measuring columns are formed in the lower portion of the floating body material, and the tops of the main measuring columns are inserted into the grooves in the lower portion of the floating body material; and a connecting unit capable of being separated through electric control is arranged between the main control cabin and the central measuring unit.
As a preferred scheme, a vertical shaft is fixedly arranged at the measuring opening; the vertical shaft is respectively provided with an azimuth sensor mounting plate and a displacement sensor mounting plate;
the displacement sensor mounting disc is rotatably connected with the vertical shaft, and a displacement sensor is fixedly mounted at the edge of the displacement sensor mounting disc; a spiral groove is formed in the side edge of the displacement sensor mounting disc;
the azimuth sensor mounting plate is fixedly connected with the vertical shaft, and the azimuth sensor is rotatably mounted on the azimuth sensor mounting plate through a rotating shaft;
an indicating rod is fixedly arranged on the rotating shaft and horizontally arranged; the indicating rod is fixedly connected with a restraint piece, and a through hole allowing the measuring rope to pass through is formed in the restraint piece;
the measuring rope passes through the through hole on the restraint piece after bypassing the groove on the side edge of the displacement sensor mounting disc, and then passes through the measuring opening.
Preferably, the measuring opening has a certain opening degree.
Further, the sum of the opening degrees of the measuring openings on the main measuring columns is 360 degrees.
As the preferred scheme, set up 3~5 main measurement post.
As a preferred scheme, an auxiliary measuring column is fixedly arranged on the auxiliary supporting frame, and the tail end of the measuring rope is fixed on the auxiliary measuring column.
Preferably, the connecting unit is a watertight connector and/or an underwater sound release system;
the watertight connector comprises a male connector fixed on the main measuring column and a female connector fixed at the bottom of the main control cabin;
the underwater sound release system comprises an underwater sound releaser, an underwater sound releaser hook lock and a spring fastener; the spring fastener is fixed on the support panel; the underwater sound releaser is fixed at the bottom of the main control cabin, the upper part of the hook lock of the underwater sound releaser is connected with the underwater sound releaser, and the lower part of the hook lock of the underwater sound releaser is connected with the spring fastener.
As a preferred scheme, a main control system, a data acquisition system, a data storage system, a state monitoring system and a power supply system are arranged in the main control cabin; the master control system is respectively connected with the data acquisition system, the data storage system, the state monitoring system and the power supply system; the data acquisition system is in communication connection with each azimuth measuring unit and each displacement measuring unit in the central measuring unit.
The underwater acoustic locator is characterized by further comprising a deck control unit, wherein the deck control unit is in communication connection with the underwater acoustic locator, the beacon machine and the underwater acoustic releaser; and the beacon machine and the underwater sound locator are in communication connection with the master control system.
The method for observing deformation and sliding of the seabed surface layer for a long time by adopting the device comprises the following steps:
1) cloth is put
Respectively arranging the central measuring unit connected with the recovery part and each auxiliary measuring unit to a target point position through a main survey ship and an auxiliary survey ship; the initial distance between each auxiliary measuring unit and the central measuring unit is more than 1 km;
2) long term observation
The gravity anchors on each auxiliary measuring unit slide along with the surface sediment, the sliding direction is measured by the direction measuring unit, and the sliding displacement is measured by the displacement measuring unit; the sliding direction and the sliding displacement data are collected by a data acquisition system in the main control cabin and stored by a data storage system;
3) recovering
The survey vessel is driven to a recovery and arrangement point, the connection unit is controlled to disconnect the connection between the main control cabin and the central measuring unit, the recovery part floats to the sea surface under the action of floating body materials, and the device is salvaged and recovered;
4) and reading the analysis data, and determining the deformation sliding distance and the deformation sliding direction of the seabed surface layer.
The invention has the beneficial effects that:
1. the device can realize the in-situ long-term observation of the deformation sliding displacement and the direction of the seabed surface sediment, and can quantitatively measure the deformation degree and the sliding direction of the seabed surface sediment within a certain range.
2. The device has the characteristics of large-scale measurement, and can measure the deformation sliding process of regional seabed sediments.
3. The recycling part in the device can be recycled, so that the device has good reutilization property, and the observation cost can be greatly saved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a seabed surface layer deformation sliding long-term observation device;
FIG. 2 is a schematic structural diagram of a indwelling part in the sliding long-term observation device for deformation of the surface layer of the seabed in accordance with the present invention;
FIG. 3 is a schematic structural diagram of a recovery part in the seabed surface layer deformation sliding long-term observation device of the invention;
FIG. 4 is a schematic view of a measuring column; (in the figure, a is a schematic external structure of the measuring column; b is a schematic cross-sectional structure of A-A' in a);
FIG. 5 is a schematic view of a portion of the front view of FIG. 4 b;
FIG. 6 is a schematic view of the displacement sensor mounting plate of FIG. 5;
FIG. 7 is a schematic structural view of the orientation sensor mounting plate and the orientation sensor of FIG. 5;
FIG. 8 is a schematic structural diagram of a corresponding portion of FIG. 5;
FIG. 9 is a block diagram of the control structure of the apparatus of the present invention;
FIG. 10 is a flow chart of a long-term observation method of seabed surface deformation sliding;
FIG. 11 is a schematic diagram of the arrangement of the seabed surface layer deformation sliding long-term observation device;
FIG. 12 is a schematic view of the recovery of the seabed surface layer deformation sliding long-term observation device;
FIG. 13 is a schematic diagram of determining the sliding distance and orientation of deformation of the seabed surface.
Detailed Description
In the description of the present invention, the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "vertical", "horizontal", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for the purpose of describing the present invention but do not require that the present invention must be constructed or operated in a specific orientation, and thus, should not be construed as limiting the present invention. The terms "connected" and "connected" in the present invention should be interpreted broadly, and may be connected or disconnected, for example; the terms may be directly connected or indirectly connected through intermediate components, and specific meanings of the terms may be understood as specific conditions by those skilled in the art.
Example 1
As shown in figures 1-8, the long-term observation device for the deformation and sliding of the seabed surface layer comprises a retention part (figure 2) and a recovery part (figure 3).
As shown in fig. 2 (only one auxiliary measuring unit is shown in fig. 2, and the remaining three auxiliary measuring units are omitted in order to more clearly show the structure of the apparatus of the present invention in the drawing), the indwelling portion includes one central measuring unit and four auxiliary measuring units.
The bottommost part of the central measuring unit is provided with a suction anchor 16, the upper part of the suction anchor 16 is fixedly connected with a support frame 14, and the middle part of the support frame 14 is fixed with a stop disc 15. A support panel 13 is fixedly arranged above the support frame 14. The support panel 13 is rectangular, one main measuring column 11 is arranged near each corner of the support panel 13, and the four main measuring columns 11 are identical in structure. The main measuring column 11 is fixedly provided with an inserting male head 10 through a bracket; the middle part of the supporting panel 13 is fixed with a spring buckle 8. The structure of one of the main measuring columns 11 will be described below.
The main measuring column 11 is provided with a measuring rope disc through a measuring shaft and a coil spring, and the measuring rope 18 can automatically retract, which is similar to the automatic retraction of a measuring tape or a telescopic isolation belt. The main measuring columns 11 are provided with measuring openings 12, as shown in fig. 4, the opening degree of the measuring openings 12 is 90 °, and the measuring openings 12 on the four main measuring columns 11 are all 90 °, which is equivalent to that the measured areas are all within 360 ° around the center.
As shown in fig. 4, 5, 6, 7, and 8, a vertical shaft 26 is fixed to the measurement opening 12, and an orientation sensor mounting plate 27 and a displacement sensor mounting plate 28 are provided on the vertical shaft 26. The orientation sensor mounting plate 27 is fixed, i.e. non-rotatable, to the vertical shaft 26. And the displacement sensor mounting plate 28 is rotatably mounted on the vertical shaft 26 by bearings, i.e., the displacement sensor mounting plate 28 is rotatable about the vertical shaft 26.
The azimuth sensor mounting plate 27 is provided with a bearing mounting hole, the bearing mounting hole is provided with a rotating shaft 32 through a bearing, and the axis of the rotating shaft 32 is parallel to the axis of the vertical shaft 26; the orientation sensor 31 is fixedly mounted on the rotary shaft 32. The rotating shaft 32 is fixedly connected with the indicating rod 24, and the indicating rod 24 is horizontally arranged. A restraint piece 25 is fixed on the indicating rod 24, and the restraint piece 25 is vertically arranged; a measuring string perforation 33 is provided below the restraint 25.
A displacement sensor 29 is fixed to the outermost edge of the displacement sensor mounting plate 28. The side of the displacement sensor mounting disc 28 is provided with a spiral groove 30, and the free end of the measuring rope 18 is wound around the spiral groove 30, passes through the measuring rope through hole 33 on the restraint member 25, and finally passes out of the main measuring column 11 through the measuring opening 12.
The four auxiliary measuring units have the same structure, and the structure of one of the auxiliary measuring units is described below as an example.
The bottom of the auxiliary measuring unit is a gravity anchor 23, the gravity anchor 23 is fixedly connected with an auxiliary supporting frame 21, and an auxiliary stop disc 22 is arranged in the middle of the auxiliary supporting frame 21. An auxiliary measuring column 20 is fixed at the top of the auxiliary supporting frame 21, and an auxiliary hoisting ring 19 is fixed at the top of the auxiliary measuring column 20. The end of the measuring string 18 that exits from the main measuring column 11 is fixed to an auxiliary measuring column 20.
As shown in fig. 3, the recovery part comprises a floating body material 5 and a main control cabin 4, the main control cabin 4 penetrates through the floating body material 5, and a water sound locator 2, a beacon machine 3 and a hanging ring 1 are fixed at the top of the main control cabin 4; grooves matched with the main measuring columns 11 are formed in the lower portion of the floating body material 5, and the tops of the main measuring columns 11 are inserted into the grooves in the lower portion of the floating body material 5.
The bottom of the main control cabin 4 is provided with an underwater sound releaser 6, and the underwater sound releaser 6 is connected with an underwater sound releaser hook lock 7. The underwater sound releaser catch 7 is connected to a snap catch 8 on the support panel 13.
In addition, four inserting female heads 9 are arranged at the bottom of the main control cabin 4, and each inserting female head 9 is respectively inserted with an inserting male head 10 on each main measuring column 11; the female plug-in head 9 and the male plug-in head 10 are a set of watertight plug-in components.
A main control system, a data acquisition system, a data storage system, a state monitoring system and a power supply system are arranged in the main control cabin 4; and the attitude sensor and the water depth sensor which are arranged in the main control cabin 4 are connected with the state monitoring system.
As shown in fig. 9, the data acquisition system is connected to each orientation sensor and each displacement sensor in the central measurement unit; the master control system is respectively connected with the data acquisition system, the data storage system, the state monitoring system and the power supply system. In addition, the master control system is also in communication connection with the beacon machine, the underwater sound locator and the underwater sound releaser.
The underwater sound positioner, the beacon machine and the underwater sound releaser are in wireless connection with the deck control unit.
As shown in fig. 10, the method for long-term observation of deformation and sliding of the surface layer of the seabed by using the device comprises the following steps:
1) cloth is put
As shown in fig. 11, the main survey vessel and the auxiliary survey vessel arrive at the distribution station, and the central measuring unit connected with the recovery part and the free falling bodies of the auxiliary measuring units are respectively lowered to the target point position by the main survey vessel and the auxiliary survey vessel; the initial distance between each auxiliary measuring unit and the central measuring unit is more than 1 km; the observation device itself adjusts the overall attitude sufficiently under the action of the suction anchor 16, the gravity anchor 23 and the floating body material 5. Under the action of the gravity anchor and the suction anchor, each auxiliary measuring unit and the central measuring unit sink into the sediment to a certain depth, so that the measuring scale is approximately parallel to the seabed.
In the process of arranging the observation device, the external force applied to the observation device comprises gravity, buoyancy and seawater resistance in the process of descending. Wherein, gravity is downward, buoyancy is upward, and seawater resistance is opposite to the motion direction. According to Bernoulli' S equation, seawater resistance is related to the descending speed and the stress action cross-sectional area S (vertical projection area) of the device, and the faster the descending speed of the device, the larger the stress action cross-sectional area S, the larger the seawater resistance.
In order to realize the automatic arrangement, each part of the observation device needs to satisfy the following relational expression:
(m1+m2)g＝ρg(V1+V2)+0.5Cρv1 2S (1)
in the formula (1), the reaction mixture is,
m1the recovery section being wholly in airMass in (1), unit kg;
m2-mass in air of the main observation device of the indwelling part, in kg;
g-acceleration of gravity in m/s2；
Rho-sea water density, unit kg/m3；
V1Overall volume of the recovery section in m3；
V2Subjective measurement of the overall volume of the device's retention, in m3；
c-resistance coefficient of seawater, dimensionless;
v1-measuring the constant descent speed of the device in steady state in units of m/s;
s-area of stress action cross section (area of vertical projection) of the observation device, unit m2。
2) Long term observation
When the seabed surface layer deforms and slides due to creep deformation, landslide and the like, the central measuring unit does not move under the action of the suction anchor (realized through the suction anchor 16), and the auxiliary measuring unit slowly slides along with surface sediment under the action of the gravity anchor, so that a stable seabed surface layer deformation sliding observation system is formed. Measuring a sliding direction by a direction sensor, and measuring a sliding displacement by a displacement sensor; the length change data of the measuring rope 18 and the azimuth change data of the auxiliary measuring unit are collected by the data acquisition system of the main control cabin 4 and stored in the data storage system to be recovered.
3) Recovering
The recovery method is shown in fig. 12, and specifically comprises the following steps:
the survey ship arrives and lays the station position, obtains the specific position of main observation device under water through the underwater sound location, then sends the signal through underwater sound releaser deck unit, opens this observation device's underwater sound releaser hook lock 7 for spring catch 8 drops from underwater sound releaser hook lock 7.
After the spring fastener 8 is separated from the underwater sound releaser hook lock 7, the recovery device floats upwards under the action of the floating body material 5, and meanwhile, the watertight connector inserting female head 9 and the inserting male head 10 are naturally separated, and at the moment, the remaining part of the observation device is separated from the recovery part;
after the recovery device floats to the sea level, the beacon machine 3 sends a positioning signal to adjust the position of the survey ship, and the salvage work of the recovery device is completed.
In the recovery process of the observation device, the external force applied to the observation device comprises gravity, buoyancy and seawater resistance in the descending process. Wherein, gravity is downward, buoyancy is upward, and seawater resistance is opposite to the motion direction. In order to realize the automatic arrangement and recovery, all parts of the observation device need to satisfy the following relational expression:
m1g+0.5Cρv2 2S＝ρgV1(2)
in the formula (2), the reaction mixture is,
m1the mass of the recovery section as a whole in air, in kg;
g-acceleration of gravity in m/s2；
C-resistance coefficient of seawater, dimensionless;
rho-sea water density, unit kg/m3；
v2-the recovery part floats upwards at a constant speed in m/s during the recovery process;
s-area of stress action cross section (vertical projection area) of the observation device, unit m2；
V1Overall volume of the recovery section in m3。
4) And reading the analysis data, and determining the deformation sliding distance and the deformation sliding direction of the seabed surface layer.
As shown in fig. 13, taking the central measurement unit O and one auxiliary measurement unit a as an example, the central measurement unit is regarded as being stationary at the point O under the action of the suction anchor, the auxiliary measurement unit a slides along with the deformation of the surface sediments of the seabed under the action of the gravity anchor, and after a moves to the point a ', the sizes of the distance a-a' and the angle θ can be known through the obtained telescopic distance of the measuring rope and the azimuth angle data of the auxiliary measurement unit.
Using the cosine theorem c of triangles2＝a2+b2And 2abcos theta, wherein a and b are the known side lengths, and the angle theta is the included angle between the known side lengths a and b, so that the length of c can be calculated.
Namely:
in the formula (3), the reaction mixture is,
measuring the length of the rope when the OA is in an initial state;
OA' is the length of the measuring rope after deformation;
the angle theta is the angle measured by the orientation sensor.
Example 2
The difference from the embodiment 1 is that: three main measuring columns and three auxiliary measuring units are provided, and the opening degree of the measuring opening on each main measuring column is 120 degrees.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description.
Claims (10)
1. A seabed surface layer deformation sliding long-term observation device is characterized in that: comprises a retention part and a recovery part;
the indwelling part comprises a central measuring unit and a plurality of auxiliary measuring units;
the central measuring unit comprises a suction anchor, a support frame fixed on the suction anchor and a support panel fixed on the support frame from bottom to top, and a stop disc is fixed on the support frame; a plurality of main measuring columns are fixed on the supporting panel and correspond to the auxiliary measuring units one by one;
the main measuring column is internally provided with a measuring rope disc capable of automatically retracting, a measuring opening is formed in the main measuring column, and a displacement measuring unit capable of measuring the moving displacement of the measuring rope and an azimuth measuring unit capable of measuring the moving angle of the measuring rope are arranged at the measuring opening;
the auxiliary measuring unit comprises a gravity anchor and an auxiliary supporting frame fixed on the gravity anchor from bottom to top; an auxiliary stop disc is fixed on the auxiliary support frame; the tail end of the measuring rope in the main measuring column penetrates out of the measuring opening and then is fixed on the auxiliary supporting frame;
the recovery part comprises a floating body material and a main control cabin, the main control cabin penetrates through the floating body material, and a water sound locator and a beacon machine are fixed at the top of the main control cabin; grooves matched with the main measuring columns are formed in the lower portion of the floating body material, and the tops of the main measuring columns are inserted into the grooves in the lower portion of the floating body material; and a connecting unit capable of being separated through electric control is arranged between the main control cabin and the central measuring unit.
2. The seabed surface layer deformation sliding long-term observation device as claimed in claim 1, wherein: a vertical shaft is fixedly arranged at the measuring opening; the vertical shaft is respectively provided with an azimuth sensor mounting plate and a displacement sensor mounting plate;
the displacement sensor mounting disc is rotatably connected with the vertical shaft, and a displacement sensor is fixedly mounted at the edge of the displacement sensor mounting disc; a spiral groove is formed in the side edge of the displacement sensor mounting disc;
the azimuth sensor mounting plate is fixedly connected with the vertical shaft, and the azimuth sensor is rotatably mounted on the azimuth sensor mounting plate through a rotating shaft;
an indicating rod is fixedly arranged on the rotating shaft and horizontally arranged; the indicating rod is fixedly connected with a restraint piece, and a through hole allowing the measuring rope to pass through is formed in the restraint piece;
the measuring rope passes through the through hole on the restraint piece after bypassing the groove on the side edge of the displacement sensor mounting disc, and then passes through the measuring opening.
3. The seabed surface layer deformation sliding long-term observation device as claimed in claim 1 or 2, wherein: the measuring opening has an opening.
4. The seabed surface layer deformation sliding long-term observation device as claimed in claim 3, wherein: the sum of the opening degrees of the measuring openings on the main measuring columns is 360 degrees.
5. The seabed surface layer deformation sliding long-term observation device as claimed in claim 1 or 2, wherein: 3-5 main measuring columns are arranged.
6. The seabed surface layer deformation sliding long-term observation device as claimed in claim 1 or 2, wherein: an auxiliary measuring column is fixedly arranged on the auxiliary supporting frame, and the tail end of the measuring rope is fixed on the auxiliary measuring column.
7. The seabed surface layer deformation sliding long-term observation device as claimed in claim 1 or 2, wherein: the connecting unit is a watertight connector and/or an underwater sound release system;
the watertight connector comprises a male connector fixed on the main measuring column and a female connector fixed at the bottom of the main control cabin;
the underwater sound release system comprises an underwater sound releaser, an underwater sound releaser hook lock and a spring fastener; the spring fastener is fixed on the support panel; the underwater sound releaser is fixed at the bottom of the main control cabin, the upper part of the hook lock of the underwater sound releaser is connected with the underwater sound releaser, and the lower part of the hook lock of the underwater sound releaser is connected with the spring fastener.
8. The seabed surface layer deformation sliding long-term observation device as claimed in claim 1 or 2, wherein: a master control system, a data acquisition system, a data storage system, a state monitoring system and a power supply system are arranged in the master control cabin; the master control system is respectively connected with the data acquisition system, the data storage system, the state monitoring system and the power supply system; the data acquisition system is in communication connection with each azimuth measuring unit and each displacement measuring unit in the central measuring unit.
9. The seabed surface layer deformation sliding long-term observation device as claimed in claim 8, wherein: the system also comprises a deck control unit which is in communication connection with the underwater sound positioner, the beacon machine and the underwater sound releaser; and the beacon machine and the underwater sound locator are in communication connection with the master control system.
10. A method for long term observation of deformation and slippage of the surface of the seabed using the apparatus of claim 1, comprising the steps of:
1) cloth is put
Respectively arranging the central measuring unit connected with the recovery part and each auxiliary measuring unit to a target point position through a main survey ship and an auxiliary survey ship; the initial distance between each auxiliary measuring unit and the central measuring unit is more than 1 km;
2) long term observation
The gravity anchors on each auxiliary measuring unit slide along with the surface sediment, the sliding direction is measured by the direction measuring unit, and the sliding displacement is measured by the displacement measuring unit; the sliding direction and the sliding displacement data are collected by a data acquisition system in the main control cabin and stored by a data storage system;
3) recovering
The survey vessel is driven to a recovery and arrangement point, the connection unit is controlled to disconnect the connection between the main control cabin and the central measuring unit, the recovery part floats to the sea surface under the action of floating body materials, and the device is salvaged and recovered;
4) and reading the analysis data, and determining the deformation sliding distance and the deformation sliding direction of the seabed surface layer.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112302626A (en) * | 2020-10-29 | 2021-02-02 | 中国华能集团有限公司 | Seabed natural gas hydrate exploitation monitoring system |
| CN113432648A (en) * | 2021-07-01 | 2021-09-24 | 中国海洋大学 | System and method for long-term observation of seabed soft clay deformation and sliding induced by deep-sea internal waves |
| CN117288155A (en) * | 2023-10-11 | 2023-12-26 | 中国海洋大学 | Working method of in-situ observation equipment based on seabed sliding process |
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| CN117288155B (en) * | 2023-10-11 | 2024-04-26 | 中国海洋大学 | Working method of in-situ observation equipment based on seabed sliding process |
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