CN110196451B - Seabed soil body liquefaction degree of depth measuring device - Google Patents
Seabed soil body liquefaction degree of depth measuring device Download PDFInfo
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Abstract
The invention discloses a seabed soil liquefaction depth measuring device which comprises two penetration rods, N fixed electrodes, an elastic electrode, a signal transmitter and a signal receiver, wherein the N fixed electrodes are arranged on the two penetration rods; the fixed electrode is arranged on the first injection rod, the elastic electrode is arranged on the second injection rod, the elastic electrode is in contact conduction with the fixed electrode by virtue of self elasticity in a free state, and is separated from the fixed electrode by virtue of extrusion force of a seabed soil body when being injected into a seabed; the N pairs of electrodes are connected in series in the power supply loops of the N signal transmitters in a one-to-one correspondence mode, when the power supply loops of the signal transmitters are connected, the signal transmitters are powered on to operate, preset signals are transmitted to the signal receivers, and the signal receivers determine the liquefaction depth of the seabed soil body according to the received preset signals. The measuring device can effectively measure the liquefaction depth of the seabed soil body, has simple structure and convenient implementation, and can be used on seabed soil bodies of any soil quality type.
Description
Technical Field
The invention belongs to the technical field of marine engineering geological disaster prediction, and particularly relates to a device for measuring the liquefaction depth of a seabed soil body.
Background
The liquefaction of seabed soil under the action of waves is a common geological disaster at the seabed, and the liquefaction extends from the surface of the seabed all the way downwards and is finally stabilized at a certain depth or stopped because the action of waves disappears. Liquefaction of the seabed soil is generally likely to occur in loose fine silt or in silty soil with a lower content of sticky particles and lower strength. Besides causing the mud and sand to be suspended and moved, the liquefaction of the seabed soil body is also easy to induce a series of seabed engineering accidents, such as seabed pipeline subsidence, landslide possibly occurring at the position of a seabed slope and other disasters. At present, the depth of seabed liquefaction is generally calculated by adopting a theoretical formula, and a certain calculation error is inevitably generated because the theoretical formula and an actual liquefaction mechanism are often different to a certain extent.
In order to know the liquefaction depth of the seabed along with the wave action more reliably and accurately, the field actual measurement by adopting an instrument device is the most scientific means. At present, researchers adopt a mode of burying a pore water pressure gauge in a seabed, and indirectly judge the liquefaction condition of the seabed soil body by monitoring pore pressure change. For example, chinese patent No. 200510045361.9 discloses an apparatus for monitoring the liquefaction depth of the seabed using a soil mechanics probe. However, the device has a poor effect of measuring the pore pressure when the seabed soil body is fine-grained soil such as silt.
Disclosure of Invention
The invention aims to provide a seabed soil liquefaction depth measuring device which can effectively measure the liquefaction depth of seabed soil.
In order to solve the technical problems, the invention adopts the following technical scheme:
a seabed soil liquefaction depth measuring device comprises a penetration rod, a fixed electrode, an elastic electrode, a signal transmitter and a signal receiver; the device comprises a seabed soil body, a first penetration rod, a second penetration rod, a first fixing device and a second fixing device, wherein the two penetration rods are respectively a first penetration rod and a second penetration rod, the first penetration rod and the second penetration rod are vertically penetrated into the seabed soil body in parallel in the using process, and the length direction of the penetration rods is consistent with the vertical direction at the moment; the number of the fixed electrodes is N, the fixed electrodes are arranged on the first penetration rod and are sequentially arranged at intervals along the length direction of the first penetration rod, and N is more than or equal to 2; the number of the elastic electrodes is N, the elastic electrodes are arranged on the second penetration rod and are sequentially arranged at intervals along the length direction of the second penetration rod; the N fixed electrodes and the N elastic electrodes are in one-to-one correspondence to form N pairs of electrodes, and in each pair of electrodes, the elastic electrodes are in contact conduction with the fixed electrodes by virtue of self elasticity in a free state and are separated from the fixed electrodes by virtue of extrusion force of seabed soil when the elastic electrodes penetrate into a seabed; the signal transmitters comprise N pairs of electrodes which are connected with a power supply in series and are in one-to-one correspondence with power supply loops of the N signal transmitters; the signal receiver is used for communicating with the N signal transmitters, when a power supply circuit of the signal transmitter is connected, the signal transmitter is electrified to operate and transmits a preset signal to the signal receiver, and the signal receiver determines the liquefaction depth of the seabed soil body according to the received preset signal.
As a preferable design of the fixed electrode, the fixed electrode is preferably designed as a ring electrode, and is sleeved on the first penetration rod.
As a preferable design of the elastic electrode, the elastic electrode preferably includes a fixing piece and an elastic piece, the fixing piece is mounted on the second penetration rod, one end of the elastic piece is connected to the fixing piece, and the other end of the elastic piece extends in a direction away from the second penetration rod in a free state and abuts against the fixing electrode in use.
In order to realize that seabed soil body of any soil type can apply enough extrusion force on the elastic sheet to separate the elastic sheet from the fixed electrode, the invention preferably designs that the elastic sheet forms an included angle alpha with the fixed sheet in a free state, and the included angle alpha is more than 90 degrees and less than 180 degrees. The elastic sheet is preferably attached to the surface of the second penetration rod after being separated from the fixed electrode by the extrusion force of the seabed soil body when being penetrated into the seabed.
In order to ensure that the penetration depths of the two penetration rods in the seabed soil body are equal, the invention preferably arranges the limiting rods at the lower parts of the first penetration rod and the second penetration rod and at the positions with the same height from the bottoms of the penetration rods, the first penetration rod and the second penetration rod are connected together through the limiting rods, and the distance between the two penetration rods is limited to be smaller than the length of the elastic sheet, so as to ensure that the elastic sheet can be accurately abutted against the fixed electrode in a free state.
Preferably, the N fixed electrodes are arranged on the first penetration rod at equal intervals, and the spacing distance between two adjacent fixed electrodes is 0.25 m; n elastic electrodes are arranged on the second penetration rod at equal intervals, the interval distance between every two adjacent fixing pieces is 0.48m, and the length of each elastic piece is 0.38 m.
Further, it is preferable that the power supply and the signal transmitter are packaged in a buoy, and when the device is used, the device floats on the sea surface by means of the buoy, and the fixed electrode and the elastic electrode are connected with the power supply or the signal transmitter through wires.
Preferably, the positive pole of the signal emitter is preferably connected with the positive pole of a power supply, the negative pole of the signal emitter is preferably connected with the elastic electrode through a wire, and the negative pole of the power supply is preferably connected with the fixed electrode through a wire, so that a power supply loop of the signal emitter is formed.
As two preferred determination methods of the liquefaction depth of the seabed soil body:
one is that the predetermined signal is the number of the signal emitter, the number contains depth data, and the depth data is the penetration depth of the elastic electrode in the power supply loop of the signal emitter in the seabed soil body; the signal receiver analyzes the depth data from the received preset signal, and selects the depth data with the maximum value as the liquefaction depth of the seabed soil body;
secondly, the preset signal is the number of a signal transmitter, the number is consistent with the number of the elastic electrodes connected in series in a power supply loop of the signal transmitter, and the N elastic electrodes are sequentially numbered from small to large according to the sequence of the penetration depth of the elastic electrodes in the seabed soil body from shallow to deep; the signal receiver selects the number with the largest numerical value from the received preset signals, and the liquefaction depth of the seabed soil body is determined according to the depth of the elastic electrode corresponding to the number with the largest numerical value from the seabed soil body in the original state.
Compared with the prior art, the invention has the advantages and positive effects that: according to the seabed soil liquefaction depth measuring device, when the seabed soil is not liquefied, each signal transmitter is in a power-off non-working state, so that the electric energy of a power supply can be saved, and the continuous working time of the device is prolonged. When the seabed soil body is liquefied, the signal receiver can judge which signal transmitters are electrified to operate according to the received preset signals, and further judge which fixed electrode the seabed soil body has descended to, so that the liquefaction depth of the seabed soil body can be determined. The measuring result obtaining mode is simple and easy to realize, easy to program and low in software design cost. In addition, the measuring device has simple structure and convenient implementation, and can be used on seabed soil bodies of any soil quality type.
Other features and advantages of the present invention will become more apparent from the detailed description of the embodiments of the present invention when taken in conjunction with the accompanying drawings.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of a seabed soil liquefaction depth measuring device provided by the invention when seabed soil is not liquefied;
fig. 2 is a schematic structural diagram of an embodiment of the seabed soil liquefaction depth measuring device provided by the invention when the seabed soil liquefaction occurs.
Detailed Description
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
Referring to fig. 1 and 2, the seabed soil liquefaction depth measuring device of the embodiment mainly includes a penetration rod, an elastic electrode 20, a fixed electrode 30, an electric wire 40, a power supply 50, a signal transmitter 60, a signal receiver 70, and the like. Wherein, the penetrating rod includes two, is the first penetrating rod 11 and the second penetrating rod 12 respectively, is used for penetrating into the seabed soil body 1 when using. The fixed electrodes 30 are provided in plural and fixedly mounted on the first penetration rod 11. For example, N fixed electrodes 30 may be attached to the first penetration rod 11, where N ≧ 2 is arranged in the longitudinal direction L of the first penetration rod 11 at intervals in order, and N =4 is shown in fig. 1 and 2. The number of the elastic electrodes 20 is equal to the number of the fixed electrodes 30, and the elastic electrodes are installed on the second penetration rod 12 and sequentially arranged at intervals along the length direction L of the second penetration rod 12. The present embodiment forms N pairs of electrodes (i.e., N electrode pairs) with N fixed electrodes 30 and N elastic electrodes 20, and includes one dedicated fixed electrode 30 and one dedicated elastic electrode 20 in each electrode pair. When designing the elastic electrode 20, it should be ensured that after the elastic electrode 20 in each electrode pair is penetrated into the seabed soil 1 by the two penetration rods 11 and 12, if there is no soil 1 at the elastic electrode 20, the elastic electrode 20 is in a free state, and in the free state, the elastic electrode 20 can automatically abut against the fixed electrode 30 paired therewith by virtue of its own elasticity, and is in contact conduction with the fixed electrode 30, as shown in fig. 2; if the seabed soil 1 exists at the elastic electrode 20, the elastic electrode 20 can be separated from the fixed electrode 30 matched with the elastic electrode under the extrusion force of the seabed soil 1, namely, the connection between the two is broken, as shown in fig. 1. The elastic electrode 20 and the fixed electrode 30 are respectively connected with an electric wire 40, the electric wires 40 are connected with a power supply 50 or a signal emitter 60, so that the N pairs of electrodes are just connected in series in a power supply loop of the N signal emitters 60 in a one-to-one correspondence manner, and the N pairs of electrodes are switched on and off to control the power-on operation or power-off shutdown of the N signal emitters 60. In the present embodiment, each signal transmitter 60 is in wireless communication with a signal receiver 70. Predetermined information is written in each signal transmitter 60 in advance, and when the signal transmitter 60 is powered on to operate, the stored predetermined information is sent to the signal receiver 70. The signal receiver 70 determines the depth of liquefaction of the seabed soil from the predetermined information received.
In this embodiment, the two penetration rods 11, 12 are preferably made of steel pipe or high-strength PVC pipe, and the bottom is designed to be tapered to facilitate penetration into the seabed soil. The tubular penetration rods 11, 12 are preferably designed in a sealing structure such that the electric wires 40 connecting the elastic electrodes 20 and the fixed electrodes 30 are passed through the sealing cavities of the penetration rods 11, 12 and then connected to the elastic electrodes 20 and the fixed electrodes 30 mounted on the outer surfaces of the penetration rods 11, 12.
The two penetrating rods 11, 12 should penetrate in parallel and vertically when penetrating into the seabed soil mass, i.e. the length direction L of the two penetrating rods 11, 12 should be the same as the vertical direction, and the penetration depth of the two penetrating rods 11, 12 should be the same. In order to ensure that the penetration depth of the two penetration rods 11 and 12 is equal, a limiting rod 13 may be further added at the lower part of the two penetration rods 11 and 12 and at the same height from the bottom thereof, as shown in fig. 1 and 2. The limiting rod 13 connects the two penetration rods 11 and 12 together, so that the two penetration rods 11 and 12 can move together, and the distance between the two penetration rods 11 and 12 is limited to be fixed, so that the situation that the elastic electrode 20 cannot contact the fixed electrode 30 in a free state due to the fact that the distance between the two penetration rods 11 and 12 is too large, and measurement failure is caused is avoided.
In this embodiment, the fixed electrode 30 is preferably a ring electrode, and is fitted around the first penetrating rod 11. As a preferred embodiment, the fixed electrode 30 is preferably made of a copper sheet, is formed in a ring shape, is fixedly installed on the outer surface of the first penetration rod 11, and is preferably arranged at equal intervals along the length direction L of the first penetration rod 11. The distance between two adjacent fixed electrodes 30 is preferably set to about 0.25 m.
As a preferred structure design of the elastic electrode 20, the elastic electrode 20 of the present embodiment is preferably made of an elastic copper sheet, and includes a fixing sheet 21 and an elastic sheet 22. Wherein, the fixing piece 21 is used for being fixedly installed on the outer surface of the second penetration rod 12; one end of the elastic piece 22 is connected to the fixing piece 21, and the other end extends in a direction away from the second penetration rod 12 in a free state and is allowed to abut against the fixed electrode 30 mated therewith.
In this embodiment, the elastic sheet 22 preferably forms an angle α with the fixed sheet 21 in its free state, and the angle range of the angle α is preferably designed to be 90 ° < α <180 °, as shown in fig. 2, so as to ensure that the elastic sheet 22 can apply enough extrusion force to the seabed soil 1 regardless of the soil type, so that the elastic sheet 22 is separated from the fixed electrode 30, and thus the design requirement of the electrode pair for automatic disconnection under the seabed soil 1 is satisfied. As a preferred embodiment, this embodiment is designed such that the included angle α of the elastic sheet 22 is increased to 180 ° when the elastic sheet 22 is pressed by the seabed soil 1, that is, the elastic sheet 22 and the fixing sheet 21 are in the same linear position, so that the elastic sheet 22 is completely attached to the outer surface of the second penetration rod 12, as shown in fig. 1.
In this embodiment, it is preferable that the elastic electrodes 20 are arranged on the second penetration rod 12 at equal intervals, and the distance between the fixing pieces 21 of two adjacent elastic electrodes 20 is preferably set to about 0.48 m. In each of the elastic electrodes 20, the length of the fixing piece 21 is preferably designed to be about 0.1m, the length of the elastic piece 22 is preferably designed to be about 0.38m, and the distance between the first penetrating rod 11 and the second penetrating rod 12 is preferably limited to about 0.3 m. When the elastic piece 22 is completely attached to the outer surface of the second penetration rod 12, it is preferable to design the upper boundary of the elastic piece 22 to be higher than the upper boundary of the fixed electrode 30 by 3 to 5cm for each electrode pair so that the angle α between the elastic piece 22 and the fixed piece 21 can be maintained between 90 ° and 180 ° when the elastic piece 22 abuts against the fixed electrode 30 in a free state.
In the soil liquefaction depth measuring device of the present embodiment, a float 80 is further provided, as shown in fig. 1 and fig. 2, preferably, the power supply 50 and the signal transmitter 60 are packaged in the float 80, so that the power supply 50 and the signal transmitter 60 can be isolated from the outside, and the safety and reliability of the work thereof are ensured. In use, the float 80 carries the power source 50 and the signal emitter 60 to float on the sea surface 2, and the power source 50 and the signal emitter 60 are electrically connected to the elastic electrode 20 and the fixed electrode 30 on the sea bottom through the electric wires 40. As a preferred embodiment, the positive electrodes of the N signal emitters 60 may be respectively connected to the positive electrode of the power supply 50 through the N wires 40, the negative electrodes of the N signal emitters 60 are respectively connected to the N elastic electrodes 20 through the N wires 40 in a one-to-one correspondence, and the negative electrode of the power supply 50 is connected to the N fixed electrodes 30 through the N wires 40 in a one-to-one correspondence, so that N power supply loops corresponding to one of the N signal emitters 60 are formed, and each power supply loop is controlled to be turned on or off by a pair of dedicated electrodes.
In this embodiment, the electric wire 40 preferably transmits electric power by using a cable having a high tensile strength. The power source 50 preferably employs a high-energy battery or a solar battery to extend the duration of continuous operation of the measuring device. The float 80 is preferably made of a high strength plastic and is preferably designed in a spherical shape so as to provide sufficient buoyancy to the power source 50 and the signal emitter 60.
The following describes a specific use method of the measuring device of the present embodiment with reference to fig. 1 and fig. 2 as follows:
the measuring device of the embodiment is transported to a sea area to be measured by a ship, the buoy 80 is thrown into the sea surface 2, the two penetration rods 11 and 12 are driven into the seabed soil body 1 in parallel and vertically by the penetration equipment, the distance between the two penetration rods 11 and 12 is about 0.3m, the elastic sheet 22 of the elastic electrode 20 faces one side of the fixed electrode 30, all the elastic electrodes 20 and the fixed electrodes 30 are buried in the seabed soil body 1, and the distance between the pair of the shallowest electrodes penetrating into the soil body and the top surface of the soil body is known or is close to the top surface of the soil body.
When the elastic electrode 20 is penetrated into the seabed soil 1, the seabed soil 1 applies an upward pressing force to the elastic sheet 22 of the elastic electrode 20, so that the elastic sheet 22 is forced to adhere to the outer surface of the second penetration rod 12 and is separated from the fixed electrode 30, as shown in fig. 1. At this time, all the electrode pairs are in the off state, so that the power supply circuits of all the signal emitters 60 are all turned off, and all the signal emitters 60 are in the power-off and shutdown state, thereby effectively saving the electric quantity of the power supply 50 and prolonging the working time of the device. During this time, the signal receiver 70 does not receive any signal from the signal transmitter 60 and determines that the current seabed soil 1 is not liquefied.
When the sea bed soil body 1 is liquefied from the surface gradually downwards in the weather of large wind waves such as typhoon, storm surge and the like, when the soil body at the elastic electrode 20 with the shallowest penetration depth is liquefied, the extrusion force applied by the soil body to the elastic sheet 22 is lost, and the elastic sheet 22 bounces off under the action of the self elastic restoring force to enter a free state, as shown in fig. 2. At this time, the elastic piece 22 just contacts and conducts with the fixed electrode 30 paired with the elastic piece, and the power supply circuit of the signal transmitter 60 connected with the pair of electrodes is connected, so that the signal transmitter 60 is powered on to operate, a wireless signal with a certain frequency is transmitted, and a preset signal stored in advance is transmitted to the signal receiver 70. The signal receiver 70 is designed to receive a radio signal at this frequency and to determine the liquefaction depth of the seabed soil 1 from the predetermined signal received.
Based on the principle, when the seabed soil body 1 is liquefied to reach the position of the elastic electrode 20 with the second penetration depth, the elastic sheet 22 of the elastic electrode 20 with the second penetration depth restores to the free state and is in contact conduction with the fixed electrode 30 matched with the elastic sheet, so that the power supply loop of the signal transmitter 60 connected with the pair of electrodes is connected, the signal transmitter 60 is controlled to be powered on to operate, and a predetermined signal is transmitted to the signal receiver 70 to determine the current liquefaction depth of the seabed soil body 1.
And so on, until the signal receiver 70 receives the predetermined signals sent from all the signal transmitters 60, it indicates that the device can no longer continue to perform the measurement task, and the measurement device needs to be recovered.
As to how the signal receiver 70 determines the liquefaction depth of the seabed soil 1 according to the received predetermined signal, the present embodiment proposes the following two preferable designs:
in the first embodiment, the predetermined signal is designed as the number of the signal transmitter 60, and the number includes the code of the signal transmitter 60 and the depth data. The depth data is the penetration depth of the elastic electrode 20 in the seabed soil body 1, which is connected in series in the power supply circuit of the signal transmitter 60. In particular, it is possible to specify an initial position of the two penetrating rods 11, 12 when penetrating into the seabed soil 1, which initial position should be adjacent to the top of the penetrating rods 11, 12, so that the distance of each elastic electrode 20 with respect to the initial position is known. The distance of each elastic electrode 20 from the initial position is used as the depth data corresponding to the elastic electrode 20, and is written in advance into the signal transmitter 60 of the power supply circuit where the elastic electrode 20 is located. Thus, when the signal receiver 70 receives the predetermined signal transmitted by the signal transmitter 60, the depth data can be analyzed. When the signal receiver 70 receives a plurality of predetermined signals, the signal receiver 70 is designed to select the depth data with the largest value from the plurality of analyzed depth data as the current liquefaction depth of the seabed soil.
In the second scheme, the predetermined signal is designed as the number of the signal emitter 60, and the number is designed to be consistent with the number of the elastic electrode 20 connected in series in the power supply loop of the signal emitter 60. For example, the elastic electrode 20 with the number 1 has the number 1 of the signal transmitter 60 in the power supply loop in which it is located; the signal emitter 60 in the power supply loop of the elastic electrode 20 with the number N is also numbered N. The N elastic electrodes 20 are numbered from small to large in sequence according to the penetration depth of the elastic electrodes in the seabed soil body 1 from shallow to deep, namely, the more shallow the penetration depth is, the smaller the number is; the deeper the penetration depth, the larger the number of the elastic electrode. It is provided that the initial position of the two penetration rods 11, 12 when penetrating into the seabed soil 1 is fixed, so that the height of each elastic electrode 20 from the initial position is fixed. The height of each elastic electrode 20 from the initial position may be written in the signal receiver 70 in advance and saved in association with the number. After the signal receiver 70 receives the predetermined signal, if the predetermined signal includes a plurality of signals, the signal receiver 70 is designed to select the number with the largest numerical value from the signals, and the height value stored in association with the number with the largest numerical value is searched according to the number with the largest numerical value, and the height value is the current liquefaction depth of the seabed soil body 1.
It is to be understood that the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and those skilled in the art may make modifications, alterations, additions or substitutions within the spirit and scope of the present invention.
Claims (10)
1. A seabed soil liquefaction depth measuring device, comprising:
the device comprises a seabed soil body, a first penetration rod, a second penetration rod, a first sealing ring, a second sealing ring and a sealing ring, wherein the two penetration rods are respectively a first penetration rod and a second penetration rod, the first penetration rod and the second penetration rod are vertically penetrated into the seabed soil body in parallel in the using process, and the length direction of the penetration rods is consistent with the vertical direction at the moment;
the fixed electrodes comprise N fixed electrodes, are arranged on the first penetration rod and are sequentially arranged at intervals along the length direction of the first penetration rod, and N is more than or equal to 2;
the elastic electrodes comprise N elastic electrodes, are arranged on the second penetration rod and are sequentially arranged at intervals along the length direction of the second penetration rod; the N fixed electrodes and the N elastic electrodes are in one-to-one correspondence to form N pairs of electrodes, and in each pair of electrodes, the elastic electrodes are in contact conduction with the fixed electrodes by virtue of self elasticity in a free state and are separated from the fixed electrodes by virtue of extrusion force of seabed soil when the elastic electrodes penetrate into a seabed;
the signal transmitters comprise N pairs of electrodes which are connected with a power supply, and the N pairs of electrodes are connected in series in the power supply loops of the N signal transmitters in a one-to-one correspondence manner;
and the signal receiver is used for communicating with the N signal transmitters, when a power supply circuit of the signal transmitter is connected, the signal transmitter is electrified and operated to transmit a preset signal to the signal receiver, and the signal receiver determines the liquefaction depth of the seabed soil body according to the received preset signal.
2. The seabed soil liquefaction depth measurement device of claim 1, wherein the fixed electrode is a ring electrode which is sleeved on the first penetration rod.
3. The seabed soil liquefaction depth measurement device of claim 2, wherein the elastic electrode comprises a fixing plate and an elastic plate, the fixing plate is mounted on the second penetration rod, one end of the elastic plate is connected with the fixing plate, and the other end of the elastic plate extends in a direction away from the second penetration rod in a free state and abuts against the fixed electrode.
4. The seabed soil liquefaction depth measurement device of claim 3, wherein the resilient sheet forms an angle α with the securing sheet in a free state, and 90 ° < α <180 °; the elastic sheet is attached to the surface of the second penetration rod after being separated from the fixed electrode by the extrusion force of the seabed soil body when penetrating into the seabed.
5. The seabed soil liquefaction depth measurement device of claim 3, wherein a limiting rod is arranged at the lower part of the first penetration rod and the second penetration rod and at the same height from the bottom of the penetration rod, the first penetration rod and the second penetration rod are connected together by the limiting rod, and the distance between the two penetration rods is limited to be less than the length of the elastic sheet.
6. The seabed soil liquefaction depth measurement device of claim 3,
the N fixed electrodes are arranged on the first penetration rod at equal intervals, and the spacing distance between every two adjacent fixed electrodes is 0.25 m;
the N elastic electrodes are arranged on the second penetration rod at equal intervals, the spacing distance between every two adjacent fixing pieces is 0.48m, and the length of each elastic piece is 0.38 m.
7. The seabed soil liquefaction depth measurement device of any one of claims 1 to 6, wherein the power supply and signal transmitter are packaged in a buoy, and when in use, the power supply and signal transmitter float on the sea surface by means of the buoy, and the fixed electrode and the elastic electrode are connected with the power supply or signal transmitter through wires.
8. The seabed soil liquefaction depth measurement device of claim 7, wherein the positive pole of the signal transmitter is connected with the positive pole of a power supply, the negative pole of the signal transmitter is connected with the elastic electrode through a wire, and the negative pole of the power supply is connected with the fixed electrode through a wire.
9. The seabed soil liquefaction depth measurement device of any one of claims 1 to 6,
the preset signal is the number of the signal emitter, the number contains depth data, and the depth data is the penetration depth of an elastic electrode in a power supply loop of the signal emitter in the seabed soil body in series;
the signal receiver analyzes the depth data from the received preset signals, and selects the depth data with the maximum value as the liquefaction depth of the seabed soil body.
10. The seabed soil liquefaction depth measurement device of any one of claims 1 to 6,
the preset signal is the number of a signal transmitter, the number is consistent with the number of the elastic electrode connected in series in a power supply loop of the signal transmitter, and the N elastic electrodes are numbered sequentially from small to large according to the sequence of the penetration depth of the elastic electrodes in the seabed soil body from shallow to deep;
the signal receiver selects the number with the largest numerical value from the received preset signals, and the liquefaction depth of the seabed soil body is determined according to the depth of the elastic electrode corresponding to the number with the largest numerical value from the seabed soil body in the original state.
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| CN114354885B (en) * | 2021-12-20 | 2023-07-14 | 应急管理部国家自然灾害防治研究院 | Quick identification measuring device for seabed seismic liquefaction in wave flow environment |
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