CN113777023A - Multi-tube sampler-based mud-water interface acoustic testing device and method - Google Patents
Multi-tube sampler-based mud-water interface acoustic testing device and method Download PDFInfo
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N19/00—Investigating materials by mechanical methods
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/04—Devices for withdrawing samples in the solid state, e.g. by cutting
- G01N1/08—Devices for withdrawing samples in the solid state, e.g. by cutting involving an extracting tool, e.g. core bit
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/04—Analysing solids
- G01N29/045—Analysing solids by imparting shocks to the workpiece and detecting the vibrations or the acoustic waves caused by the shocks
Abstract
The invention discloses a mud-water interface acoustic testing device and method based on a multi-tube sampler, wherein the device comprises a sampling mechanism, an acoustic testing mechanism, a penetration testing mechanism, a system frame and an electronic cabin, the sampling mechanism, the acoustic testing mechanism and the penetration testing mechanism are all connected with one end of the system frame, the electronic cabin is connected with the other end of the system frame, the acoustic testing mechanism and the penetration testing mechanism are all connected with the electronic cabin, and an umbilical cable is connected outside the electronic cabin. In the invention, the geomechanics test is carried out on the area to be tested through the penetration test mechanism, the acoustic test is carried out on the area to be tested through the acoustic test mechanism, and the sampling mechanism is used for sampling the area to be tested so as to verify the test result.
Description
Technical Field
The invention relates to the field of marine environment and engineering exploration, in particular to a multi-tube sampler-based mud-water interface acoustic testing device and method.
Background
The total ocean area on earth is about 3.6 hundred million square kilometers, which accounts for about 71% of the earth's surface area, and the ocean has abundant resources and great research value, so people usually explore the ocean in various ways, among which are more common: detection is performed using acoustic techniques and detection is performed using static sounding techniques. However, in practical applications, the sonar technology and the static sounding technology are generally used separately, an operator on a working ship needs to perform operations of lowering and recovering equipment for many times, and environmental conditions of equipment lowered into the sea at different times may be different, that is, positions where the equipment finally falls to the sea bottom for detection may be different, and the operation of lowering and recovering the equipment for many times aggravates the working strength of the operator; in addition, data obtained by sound wave technology detection and data obtained by static sounding technology detection cannot be verified repeatedly, so that the confidence of the data obtained by detection is not high.
Disclosure of Invention
In order to overcome the defects of the prior art, one of the purposes of the invention is to provide a mud-water interface acoustic testing device based on a multi-tube sampler, which can solve the problems that the working strength of operators on a deck is high and the obtained data cannot be verified repeatedly in the prior art, so that the confidence of the detected data is not high.
The invention also aims to provide a multi-tube sampler-based mud-water interface acoustic testing method, which can solve the problems that in the prior art, the working strength of operators on a deck is high, the obtained data cannot be repeatedly verified, and the confidence of the detected data is not high
In order to achieve one of the above purposes, the technical scheme adopted by the invention is as follows:
a mud-water interface acoustic testing device based on a multi-tube sampler comprises a sampling mechanism, an acoustic testing mechanism, a penetration testing mechanism, a system frame and an electronic cabin, wherein the sampling mechanism, the acoustic testing mechanism and the penetration testing mechanism are all connected with one end of the system frame;
the electronic cabin is used for storing and transmitting test data;
the penetration test mechanism is used for performing geomechanical test on an area to be tested;
the acoustic testing mechanism is used for performing acoustic testing on the area to be tested;
the sampling mechanism is used for sampling the area to be detected.
Preferably, the system frame includes axial connecting rod and a plurality of axial branch that encircle the peripheral setting of axial connecting rod, sampling mechanism and acoustics accredited testing organization all with the one end of axial connecting rod, the one end and the penetration test mechanism of axial branch are connected, the other end of axial connecting rod and the other end of axial branch all are connected with the electron cabin.
Preferably, the penetration test mechanism comprises a plurality of geomechanical probes arranged around the acoustic test mechanism, the geomechanical probes are connected with one end of the axial supporting rod, and the electronic cabin is connected with the geomechanical probes.
Preferably, the soil engineering mechanical probe also comprises a plurality of probe protection cylinders in a hollow structure, and the probe protection cylinders are movably sleeved on the soil engineering mechanical probe.
Preferably, acoustics accredited testing organization includes acoustics exciter and a plurality of sound wave receiver, the sound wave receiver is connected with geotechnics mechanics probe, draw together acoustics exciter and include that the sound source arouses motor and sound source excitation board, the sound source arouses the motor to be connected with axial connecting rod, the sound source arouses the output of board and sound source excitation motor to be connected.
Preferably, still include the compensation module of being connected with the axial connecting rod, the inside compensation cavity that is provided with and fills with hydraulic oil of compensation module, the one end that the compensation cavity is close to the acoustics energizer is provided with an opening, opening swing joint has a buffer board, the buffer board stimulates the motor with the sound source and is connected.
Preferably, the sampling mechanism comprises a plurality of sampling cartridges disposed around the acoustic exciter, the sampling cartridges being disposed between the acoustic exciter and the geomechanical probe via the system frame.
In order to achieve the second purpose, the technical scheme adopted by the invention is as follows:
a mud-water interface acoustic testing method based on a multi-tube sampler comprises the following steps:
s1: hoisting a mud-water interface acoustic testing device based on a multi-tube sampler to a mud-water interface through an umbilical cable;
s2: driving the penetration testing mechanism to penetrate into the area to be tested to carry out geotechnical testing so as to obtain geotechnical parameters;
s3: driving the sampling mechanism to penetrate into the area to be detected, and sampling the area to be detected to obtain a stratum sample of the area to be detected;
s4: driving an acoustic testing mechanism to perform acoustic testing on the area to be tested so as to acquire the stratum condition;
s5: and the mud-water interface acoustic testing device based on the multi-tube sampler is recovered through the umbilical cable.
Preferably, acoustics accredited testing organization includes acoustics exciter, a plurality of sound wave receiver and the compensation module who is connected with the axial connecting rod, the sound wave receiver is connected with geotechnics mechanical probe, including acoustics exciter including sound source excitation motor and sound source excitation board, the sound source excitation board is connected with the output that the sound source excited the motor, the inside compensation cavity that is filled with hydraulic oil that is provided with of compensation module, the one end that the compensation cavity is close to acoustics exciter is provided with an opening, opening swing joint has a buffer board, the buffer board stimulates the motor with the sound source and is connected.
Preferably, the step S4 is specifically implemented by the following steps:
s41: the buffer plate moves towards the direction close to the stratum or away from the stratum so as to balance the internal pressure of the compensation cavity;
s42: the sound source excitation motor drives the sound source excitation plate to emit sound waves, so that the sound wave receiver obtains the sound waves reflected by the stratum.
Compared with the prior art, the invention has the beneficial effects that: the geomechanical test is carried out on the area to be tested through a plurality of geomechanical probes in the penetration test mechanism, so as to obtain the geomechanical parameters of the area to be tested, and then the acoustic testing mechanism arranged among the plurality of geomechanical probes is used for carrying out acoustic testing on the area to be tested to obtain the stratum condition, so that the acoustic testing and the geomechanical testing are mutually verified, meanwhile, a sampling mechanism is arranged between the penetration testing mechanism and the acoustic testing mechanism, the sampling mechanism is utilized to carry out region processing on the region to be tested, so that scientific researchers can repeatedly verify the analysis conditions of the geomechanical test and the acoustic test by using the samples, and the data of the geomechanical test, the data of the acoustic test and the stratum sample in the sampling cylinder are combined for mutual verification and correlation interpretation, so that the geological condition of the area to be detected is known in a three-dimensional manner, and the detection of the shallow surface geology is realized.
Drawings
Fig. 1 is a schematic structural diagram of a multi-tube sampler-based mud-water interface acoustic testing device in the invention.
Fig. 2 is a partial sectional view in the direction a-a of fig. 1.
Fig. 3 is an enlarged schematic view of the area B in fig. 2.
Fig. 4 is an enlarged schematic view of the region C in fig. 2.
FIG. 5 is a flow chart of a multi-tube sampler based mud-water interface acoustic testing method in the invention.
In the figure: 1-a sampling mechanism; 2-an acoustic testing mechanism; 21-an acoustic exciter; 211-sound source excitation motor; 212-sound source excitation plate; 22-an acoustic receiver; 3-a penetration test mechanism; 31-a geomechanical probe; 32-a probe protection cartridge; 4-a system framework; 41-axial link; 42-axial struts; 5-a compensation module; 51-compensation chamber.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The invention will be further described with reference to the accompanying drawings and the detailed description below:
in the invention, the muddy water interface refers to an interface (called sea bottom for short) where a sediment layer at the sea bottom is mixed with sea water, the umbilical cable is connected between the electronic cabin and a working ship and belongs to the combination of a cable (a power cable or a signal cable), an optical cable (a single-mode or multi-mode optical cable) and a hydraulic or chemical agent pipe (a steel pipe or a hose), the electronic cabin can be an underwater data processing center formed by an MCU (microprogrammed control unit), a singlechip and the like, and all parts of the system frame 4 are made of corrosion-resistant and pressure-resistant materials suitable for the sea bottom environment.
The first embodiment is as follows:
as shown in fig. 1-4, a mud-water interface acoustic testing device based on a multi-tube sampler comprises a sampling mechanism 1, an acoustic testing mechanism 2, a penetration testing mechanism 3, a system frame 4 and an electronic cabin, wherein the sampling mechanism 1, the acoustic testing mechanism 2 and the penetration testing mechanism 3 are all connected with one end of the system frame 4, the electronic cabin is connected with the other end of the system frame 4, the acoustic testing mechanism 2 and the penetration testing mechanism 3 are all connected with the electronic cabin, and an umbilical cable is externally connected with the electronic cabin;
the electronic cabin is used for storing and transmitting test data;
the penetration test mechanism 3 is used for performing geomechanical test on an area to be tested;
the acoustic testing mechanism 2 is used for performing acoustic testing on a region to be tested;
the sampling mechanism 1 is used for sampling the area to be detected.
Preferably, the system frame 4 includes an axial connecting rod 41 and a plurality of axial struts 42 surrounding the periphery of the axial connecting rod 41, the sampling mechanism 1 and the acoustic testing mechanism 2 are both connected with one end of the axial connecting rod 41, one end of the axial strut 42 is connected with the penetration testing mechanism 3, and the other end of the axial connecting rod 41 and the other end of the axial strut 42 are both connected with the electronic cabin.
In this embodiment, transfer whole testing arrangement to the seabed, it is connected with the external world through the umbilical cable, and is concrete, when testing the region that awaits measuring, utilizes the gravity that self receives to order about penetration test mechanism 3 and await measuring the region, perhaps, is equipped with ballast configuration mechanism and hydraulic buffer mechanism on system frame 4, ballast configuration mechanism includes load support and a plurality of lead, the lead can be dismantled with the load support and be connected, and axial connecting rod 41 is connected with hydraulic buffer mechanism through the load support. Specifically, the penetration testing mechanism 3 and the sampling mechanism 1 are driven to penetrate into the stratum through the gravity of the lead block, so that the geotechnical testing and sample acquisition are carried out on the area to be tested, the low-interference operation is realized, the disturbance to the marine environment is reduced, and the original marine ecological environment is protected as much as possible; preferably, the hydraulic buffer mechanism comprises a piston block, a hydraulic buffer cylinder connected to the lower end of the piston block, a compression spring sleeved in the hydraulic buffer cylinder, and a piston rod penetrating in the compression spring, and the lower end of the piston block is connected with the ballast configuration mechanism through the piston rod. When the equipment is bottomed, the umbilical cable is converted into a loose state, the buffer type static pressure mechanism is triggered, the injection mechanism can descend under the action of the gravity of the counterweight lead block, the buffer oil cylinder plays a role at the same time, the penetration testing mechanism 3 and the sampling mechanism 1 are ensured to slowly and stably penetrate into the stratum, specifically, the top end of the hydraulic buffer mechanism is connected with a system frame 4 for supporting and protecting the equipment, the piston block, the hydraulic buffer oil cylinder, the compression spring and the piston rod are all arranged in the hydraulic buffer mechanism, when the ballast configuration mechanism exerts downward pressure to drive the penetration testing mechanism 3 and the sampling mechanism 1 to vertically penetrate into the stratum, the piston rod drives the piston block to exert downward pressure under the action of the ballast configuration mechanism, then the hydraulic buffer oil cylinder exerts upward force on the piston rod through the piston block to offset the huge pressure outside (the ballast configuration mechanism 3), and finally the compression spring bears and buffers the pressure brought in the whole hydraulic buffer mechanism 4, the safety and reliability of the penetration into the formation are improved.
Preferably, the sounding test mechanism 3 includes a plurality of geomechanical probes 31 arranged around the acoustic test mechanism 2, the geomechanical probes 31 are connected with one end of the axial strut 42, and the electronic cabin is connected with the geomechanical probes 31. Specifically, the geomechanical probe 31 is connected to one end of the axial strut 42 away from the electronic compartment, and since the axial strut 42 is disposed around the periphery of the axial link 41, the geomechanical probe 31 is also disposed around the acoustic testing mechanism 2, and in this embodiment, the distances from any two geomechanical probes 31 to the acoustic exciter 21 are the same.
Furthermore, each geomechanical probe 31 is embedded with a probe protection cylinder 32 in a movable sleeve manner, and the probe protection cylinder 32 is of a hollow structure; in this embodiment, the number of the sliding grooves is one or more than one, the inner wall of the probe protection cylinder 32 corresponds to the sliding grooves and extends to the geomechanical probe 31 to form sliding blocks, the sliding blocks are in sliding connection with the sliding grooves, when the device, the recovery device and the transportation device are arranged, the probe protection cylinder 32 wraps the geomechanical probe 31 therein all the time, the geomechanical probe 31 is protected from being damaged by external force, and the problems that the geomechanical probe 31 is calibrated to fail under the action of external force for a long time, so that test data is inaccurate, and the calibration is needed to be performed again are solved. When the geomechanical probe 31 penetrates into the stratum, the probe protection cylinder 32 is automatically lifted upwards under the action of ground reaction force; when the probe protection cylinder 32 is recovered, the ground does not provide reaction force to the probe protection cylinder 32 any more, and at the moment, the probe protection cylinder 32 automatically falls under the action of gravity.
Specifically, acoustics accredited testing organization 2 includes acoustics exciter 21 and a plurality of sound wave receiver 22, sound wave receiver 22 is connected with geotechnics mechanical probe 31, draw together acoustics exciter 21 and include that sound source arouses motor 211 and sound source excitation board 212, sound source arouses motor 211 and is connected with axial connecting rod 41, sound source excitation board 212 is connected with the output that sound source arouses motor 211. Preferably, the sound wave receiver 22 is disposed in the geomechanical probe 31, and the geomechanical probe 31 is disposed around the acoustic testing mechanism 2, and distances from any two geomechanical probes 31 to the acoustic exciter 21 are the same, that is, sound waves emitted by the acoustic exciter 21 are diffused from the center to the periphery, and then are acquired by the sound wave receiver 22 disposed in the geomechanical probe 31 through the same distances, so that errors are reduced, and the testing effect is improved. In this embodiment, the sound source excitation motor 211 drives the sound source excitation plate 212 to reciprocate up and down, the sound source excitation plate 212 hammers the ground (the frequency of the sound source excitation plate is adjustable) at a certain frequency, so as to excite sound waves, the emitted sound waves pass through the ground layer and return to the sound wave receiver 22 of each geomechanical probe 31, and the sound wave test data are transmitted back to the deck of the working vessel through the electronic cabin and the umbilical cable.
Preferably, still be provided with compensation module 5 between sound source excitation motor 211 and the axial connecting rod 41, the inside compensation cavity 51 that is full of hydraulic oil that is provided with of compensation module 5, the one end that compensation cavity 51 is close to acoustics energizer 21 is provided with an opening, opening swing joint has a buffer board, the buffer board stimulates motor 211 with the sound source and is connected. After falling to the ocean, maintain compensation cavity 51 unanimous with external water pressure through adjustment buffer board to open-ended distance, adjust the oil pressure in the compensation cavity 51 through adjustment buffer board to open-ended distance promptly to realize pressure compensation, make it be applicable to the deep sea environment, and then incite somebody to action the sound source motor 211 fixed, avoid using heavy equipment to realize sealed and protection, lead to with high costs, the operation difficulty.
Specifically, the sampling mechanism 1 includes a plurality of sampling cartridges disposed around the acoustic exciter 21, the sampling cartridges being disposed between the acoustic exciter 21 and the geomechanical probe 31 via the system frame 4. Preferably, the sampling cartridges are arranged on the outer wall of the sound source excitation motor 211 at equal intervals along the circumferential direction, and in this embodiment, the sampling cartridges adopt the same structure as that of an electromagnetic multi-tube sampler disclosed in chinese patent CN207396091U, so as to ensure the sampling quality.
Further, in this embodiment, the hydraulic compensation device further comprises an axial adjustment mechanism, the axial adjustment mechanism comprises a square sleeve and a support rod, an upper through hole with a diameter larger than the outer diameter of the support rod is formed in the upper end surface of the square sleeve, a lower through hole with a diameter larger than the outer diameter of the axial connecting rod 41 is formed in the lower end surface of the square sleeve, the lower end of the support rod is movably connected with the upper through hole, the upper end of the axial connecting rod 41 is movably connected with the lower through hole, the lower end of the axial connecting rod 41 is connected with one end, far away from the opening, of the compensation module 5, and the upper end of the support rod is connected with the hydraulic buffer mechanism through a ballast configuration mechanism; preferably, the lower end of the support rod and the upper end of the axial connecting rod 41 may both be connected with a universal ball, that is, the support rod and the axial connecting rod 41 may both be clamped in the square sleeve through the universal ball at the end thereof, and swing at a certain amplitude under the limitation of the upper through hole or the lower through hole, and under the action of gravity of the sampling mechanism 1 and the acoustic testing mechanism 2, the support rod and the axial connecting rod 41 may both rotate around the universal ball at the end thereof, so that the sampling mechanism 1 and the acoustic testing mechanism 2 maintain a vertical state; in this embodiment, the axial adjustment mechanism further includes an upper shaft pin and a lower shaft pin, the lower end of the support rod is movably connected to the upper through hole through the upper shaft pin, the upper end of the axial link 41 is movably connected to the lower through hole through the lower shaft pin, the aperture of the upper through hole is larger than the outer diameter of the support rod, and the aperture of the lower through hole is larger than the outer diameter of the axial link 41. The support rod is rotatably connected to the upper through hole through the upper pivot pin so that the support rod can rotate around the upper pivot pin within a range defined by the upper through hole, the axial link 41 is rotatably connected to the lower through hole through the lower pivot pin so that the axial link 41 can rotate around the lower pivot pin within a range defined by the lower through hole, and further, the projection of the upper pivot pin and the projection of the lower pivot pin on the horizontal plane form an included angle larger than 0. That is, the rotating amplitude of the support rod around the upper shaft pin and the rotating amplitude of the axial link rod 41 around the lower shaft pin do not overlap with each other in the projection on the horizontal plane, so that under the action of gravity of the sampling mechanism 1 and the acoustic testing mechanism 2, the corresponding penetration angle adjustment can be performed around one of the upper shaft pin and the lower shaft pin, so as to realize self-adjustment and multi-angle of the sampling mechanism 1 and the acoustic testing mechanism 2 under the action of gravity, so that the sampling mechanism 1 and the acoustic testing mechanism 2 can be kept vertically penetrated into the stratum as much as possible, thereby ensuring that the sound source excitation plate 212 can be kept parallel to the surface layer of the area to be tested (the sound source excitation plate 212 is parallel to the surface layer, which means that the sound source excitation plate 212 can hammer the ground more efficiently) and the verticality and the stability of the sampling process.
In this embodiment, the mud-water interface acoustic testing device based on the multi-tube sampler is hung and placed on the to-be-tested area of the mud-water interface through the umbilical cable, and due to the loose and soft soil layer of the mud-water interface, the geomechanics probe 31 can directly penetrate downwards into the to-be-tested area under the action of the gravity of the mud-water interface acoustic testing device based on the multi-tube sampler to perform geomechanics test, so that the electronic cabin obtains data such as cone tip resistance, side wall friction force, pore water pressure and the like through the geomechanics probe 31, namely test data, and transmits the test data to a working ship through the umbilical cable to calculate the type and the layering condition of sediments in the to-be-tested area; while the geomechanical probe 31 is inserted into the area to be tested, the sampling mechanism 1 synchronously performs surface layer sampling, that is, the sampling cylinder is inserted into the area to be tested for sampling; then, an acoustic test is performed, specifically, the sound source excitation motor 211 drives the sound source excitation plate 212 to reciprocate up and down, the sound source excitation plate 212 hammers the ground/seabed (the frequency of which is adjustable) at a certain frequency, further exciting the sound waves, returning the emitted sound waves to the sound wave receiver 22 of each geomechanical probe 31 after the sound waves pass through the stratum, analyzing the condition of the sediment stratum according to the sound waves received by the sound wave receiver 22, then, a multi-tube sampler-based mud-water interface acoustic testing device is recovered through an umbilical cable, a seabed surface layer sample in a sampling cylinder is extracted for verifying the analysis conditions of geomechanics test and acoustic test, and the data of the geomechanical test, the data of the acoustic test and the stratum sample in the sampling cylinder are combined for mutual verification and correlation interpretation, so that the geological condition of the area to be detected is known in a three-dimensional manner, and the detection of the shallow surface geology is realized.
Example two:
as shown in fig. 5, a mud-water interface acoustic testing method based on a multi-tube sampler comprises the following steps:
s1: hoisting a mud-water interface acoustic testing device based on a multi-tube sampler to a mud-water interface through an umbilical cable;
specifically, will hang through the umbilical cable and put to the muddy water interface that awaits measuring in the region based on the muddy water interface acoustic testing device of multi-tube sampler, at this in-process, geotechnological probe 31 is wrapped up in probe protection section of thick bamboo 32 always, when carrying out geotechnological mechanical test, under the reaction in stratum, probe protection section of thick bamboo 32 just can upwards move for geotechnological mechanical probe 31 can penetrate the stratum, when retrieving, the stratum no longer exerts reaction force to probe protection section of thick bamboo 32, probe protection section of thick bamboo 32 moves down, wrap up geotechnological mechanical probe 31 again.
S2: driving the penetration testing mechanism 3 to penetrate into the area to be tested to carry out geotechnical testing so as to obtain geotechnical parameters;
specifically, when the geomechanical test is performed, the geomechanical probe 31 of the penetration test mechanism 3 is driven to penetrate into the area to be tested by using the gravity of the mud-water interface acoustic test device based on the multi-tube sampler, the soil layer of the mud-water interface is loose and soft, the geomechanical probe 31 can penetrate into the area to be tested under the action of the gravity of the geomechanical probe 31, so that the electronic cabin obtains the cone tip resistance, the side wall friction force and the pore water pressure (namely, the geomechanical test data) through the geomechanical probe 31, and transmits the cone tip resistance, the side wall friction force and the pore water pressure (namely, the geomechanical test data) to a working ship through an umbilical cable, and the types and the layering conditions of the sediments in the area to be tested are calculated.
Further, when the geomechanical probe 31 penetrates into the ground, the probe protection cylinder 32 is automatically lifted upwards under the action of ground reaction force, so that the geomechanical probe 31 penetrates into the area to be measured.
S3: driving the sampling mechanism 1 to penetrate into the area to be tested, and sampling the area to be tested to obtain a stratum sample of the area to be tested;
specifically, while the geomechanical probe 31 penetrates into the area to be tested, the sampling mechanism 1 synchronously performs acoustic testing, and the sampling cylinder penetrates into the area to be tested to perform sampling; in the implementation, a seabed surface layer sample is collected from an area to be detected through the sampling cylinder and is stored so as to be convenient for recovery.
S4: driving the acoustic testing mechanism 2 to perform acoustic testing on the area to be tested so as to acquire the stratum condition;
concretely, acoustics accredited testing organization 2 includes acoustics exciter 21, a plurality of sound wave receiver 22 and the compensation module 5 of being connected with axial connecting rod 41, sound wave receiver 22 is connected with geotechnical probe 31, draw together acoustics exciter 21 and include that sound source arouses motor 211 and sound source excitation board 212, sound source excitation board 212 is connected with the output of sound source excitation motor 211, the inside compensation cavity 51 that is filled with hydraulic oil that is provided with of compensation module 5, the one end that compensation cavity 51 is close to acoustics exciter 21 is provided with an opening, opening swing joint has a buffer board, the buffer board excites motor 211 with the sound source and is connected. In this embodiment, the step S4 is specifically implemented by the following steps:
s41: the buffer plate moves towards the direction close to the stratum or away from the stratum so as to balance the internal pressure of the compensation cavity 51;
in this embodiment, after falling to the ocean, maintain the compensation cavity 51 unanimously with external water pressure through adjustment buffer board to open-ended distance (to being close to the stratum direction or keeping away from the stratum direction removal), adjust the oil pressure in the compensation cavity 51 through adjustment buffer board to open-ended distance promptly, in order to realize pressure compensation, make it be applicable to the deep sea environment, and then arouse motor 211 with the sound source and fix, avoid using heavy equipment to realize sealed and protection, lead to with high costs, the operation difficulty.
S42: the acoustic source excitation plate 212 is driven by the acoustic source excitation motor 211 to emit acoustic waves so that the acoustic receiver 22 captures the acoustic waves reflected by the formation.
Specifically, the sound source excitation motor 211 drives the sound source excitation plate 212 to reciprocate up and down, the sound source excitation plate 212 hammers the ground (the frequency of the sound source excitation plate is adjustable) with a certain frequency, and then excites the sound wave, the emitted sound wave returns to the sound wave receiver 22 of each geomechanical probe 31 after passing through the stratum, and thus the sediment stratum condition S5 is analyzed according to the sound wave received by the sound wave receiver 22: and the mud-water interface acoustic testing device based on the multi-tube sampler is recovered through the umbilical cable.
The device comprises a sampling barrel, a multi-pipe sampler, an umbilical cable, a mud-water interface acoustic testing device, a working ship, a seabed surface layer sample extracting device, a soil mechanics testing device, an acoustic testing device and a stratum sample analyzing device, wherein the mud-water interface acoustic testing device based on the multi-pipe sampler is recovered to the working ship through the umbilical cable, the seabed surface layer sample in the sampling barrel is extracted, the seabed surface layer sample is used for verifying the analysis conditions of data obtained by soil mechanics testing and acoustic testing, and further, the data obtained by soil mechanics testing and the data obtained by acoustic testing are combined to analyze the data obtained by soil mechanics testing, the data obtained by acoustic testing and the stratum sample in the sampling barrel, so that the three are verified and interpreted in a correlation mode, and the geological conditions of an area to be tested are known in a three-dimensional mode, and therefore detection of shallow surface geology is achieved.
Various other modifications and changes may be made by those skilled in the art based on the above-described technical solutions and concepts, and all such modifications and changes should fall within the scope of the claims of the present invention.
Claims (10)
1. The utility model provides a muddy water interface acoustics testing arrangement based on multitube sampler which characterized in that: the system comprises a sampling mechanism, an acoustic testing mechanism, a penetration testing mechanism, a system frame and an electronic cabin, wherein the sampling mechanism, the acoustic testing mechanism and the penetration testing mechanism are all connected with one end of the system frame;
the electronic cabin is used for storing and transmitting test data;
the penetration test mechanism is used for performing geomechanical test on an area to be tested;
the acoustic testing mechanism is used for performing acoustic testing on the area to be tested;
the sampling mechanism is used for sampling the area to be detected.
2. The multi-tube sampler based mud-water interface acoustic testing device of claim 1, wherein: the system frame includes axial connecting rod and a plurality of axial branch that encircle the peripheral setting of axial connecting rod, sampling mechanism and acoustics accredited testing organization all with the one end of axial connecting rod, the one end and the penetration test mechanism of axial branch are connected, the other end of axial connecting rod and the other end of axial branch all are connected with the electron cabin.
3. The multi-tube sampler based mud-water interface acoustic testing device of claim 2, wherein: the penetration test mechanism comprises a plurality of geomechanical probes arranged around the acoustic test mechanism, the geomechanical probes are connected with one end of the axial supporting rod, and the electronic cabin is connected with the geomechanical probes.
4. The multi-tube sampler based mud-water interface acoustic testing device of claim 3, wherein: the soil engineering mechanical probe also comprises a plurality of probe protection cylinders in a hollow structure, wherein the probe protection cylinders are movably sleeved on the soil engineering mechanical probe.
5. The multi-tube sampler based mud-water interface acoustic testing device of claim 3, wherein: the acoustics test mechanism includes acoustics exciter and a plurality of sound wave receiver, the sound wave receiver is connected with geotechnical probe, draw together acoustics exciter and include that the sound source arouses motor and sound source excitation board, the sound source arouses the motor and is connected with the axial connecting rod, the sound source arouses the output of board and sound source excitation motor and is connected.
6. The multi-tube sampler based mud-water interface acoustic testing device of claim 5, wherein: the acoustic excitation device is characterized by further comprising a compensation module connected with the axial connecting rod, a compensation cavity filled with hydraulic oil is arranged inside the compensation module, an opening is formed in one end, close to the acoustic excitation device, of the compensation cavity, the opening is movably connected with a buffer plate, and the buffer plate is connected with a sound source excitation motor.
7. The multi-tube sampler based mud-water interface acoustic testing device of claim 5, wherein: the sampling mechanism comprises a plurality of sampling cartridges arranged around the acoustic exciter, and the sampling cartridges are arranged between the acoustic exciter and the geomechanical probe through a system frame.
8. A mud-water interface acoustic testing method based on a multi-tube sampler is characterized by comprising the following steps:
s1: hoisting a mud-water interface acoustic testing device based on a multi-tube sampler to a mud-water interface through an umbilical cable;
s2: driving the penetration testing mechanism to penetrate into the area to be tested to carry out geotechnical testing so as to obtain geotechnical parameters;
s3: driving the sampling mechanism to penetrate into the area to be detected, and sampling the area to be detected to obtain a stratum sample of the area to be detected;
s4: driving an acoustic testing mechanism to perform acoustic testing on the area to be tested so as to acquire the stratum condition;
s5: and the mud-water interface acoustic testing device based on the multi-tube sampler is recovered through the umbilical cable.
9. The multi-tube sampler based mud-water interface acoustic testing method as claimed in claim 8, wherein the acoustic testing mechanism comprises an acoustic exciter, a plurality of acoustic receivers and a compensation module connected with the axial connecting rod, the acoustic receivers are connected with the geomechanical probe, the acoustic exciter comprises an acoustic source exciting motor and an acoustic source exciting plate, the acoustic source exciting plate is connected with an output end of the acoustic source exciting motor, a compensation cavity filled with hydraulic oil is arranged inside the compensation module, an opening is arranged at one end of the compensation cavity close to the acoustic exciter, the opening is movably connected with a buffer plate, and the buffer plate is connected with the acoustic source exciting motor.
10. The multi-tube sampler-based mud-water interface acoustic testing method according to claim 9, wherein the step S4 is implemented by the following steps:
s41: the buffer plate moves towards the direction close to the stratum or away from the stratum so as to balance the internal pressure of the compensation cavity;
s42: the sound source excitation motor drives the sound source excitation plate to emit sound waves, so that the sound wave receiver obtains the sound waves reflected by the stratum.
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