A self-expanding seismic wave static penetration testing system and method based on bionic design

Abstract

The present invention relates to a self-retractable seismic wave static penetration test system and method based on a biomimetic design. The test system includes: a self-retractable seismic wave static penetration probe, which includes a probe front end, a probe tail, and an umbilical cable connecting the probe front end and the probe tail, the probe tail being movable up and down along the umbilical cable; the probe front end including a probe cone tip, a friction sleeve, and a seismic wave detector, a force sensor, and a pore pressure sensor connected to the umbilical cable signal; the tail end being provided with a seismic wave detector; and a control and data acquisition system including an acquisition instrument and a data display and processing terminal. The present invention overcomes the difficulty of deep soil source excitation in complex geological environments such as oceans, rivers, and other water bodies or frozen soil areas caused by seismic wave static penetration testing through a flexible umbilical cable connection. Relying on its own seismic wave excitation-receiving system, the present invention achieves a combined survey of wave velocity testing and static penetration testing, greatly improving survey efficiency.

Description

Technical Field

[0001] The present invention belongs to the technical field of geotechnical engineering in-situ investigation, and relates to a self-expanding seismic wave static penetration testing system and method based on bionic design. Background Art

[0002] Shear wave velocity is a key parameter in site investigation. It has a clear physical meaning and provides crucial information on underground medium properties, earthquake impacts, geological hazard risks, and geotechnical structural stability. Shear wave velocity can be obtained through both laboratory and in-situ testing. Laboratory testing, using methods such as bending elements and resonant columns, significantly impacts sampling accuracy. Furthermore, for cohesionless soils, sampling requires costly methods such as liquid nitrogen freezing, making accurate results difficult to obtain. Furthermore, size effects, laboratory testing methods, and operational procedures can significantly deviate test results from their true values. Shear wave velocity can also be obtained through in-situ testing methods such as seismic cone penetration, seismic piezometers, downhole velocity testing, and multi-channel transient surface wave methods. Seismic cone penetration is widely used due to its high accuracy, continuous data, and good repeatability. Compared with conventional wave velocity testing devices, seismic wave static penetration can also realize functions such as fine soil stratification, geotechnical parameter prediction, and liquefaction identification. It integrates the advantages of shear wave velocity and static penetration tests, and its functionality and usage scenarios are also richer.

[0003] Seismic wave static penetration test (SCPTU) has been used in a relatively mature manner on land, but it cannot be applied in water areas or deep soils with complex geological environments. The percussion method is often used on land to excite shear waves. However, in land areas, the shear wave transmission distance of this method is relatively shallow (within 10-20m below the ground), and it is easily interfered by environmental noise in complex environments. The test results are inaccurate when the geological environment is complex, such as permafrost. At the same time, in water tests, due to the difficulty in exciting shear waves on the riverbed or seabed, the shear waves cannot be propagated underwater to the probe sensor, resulting in the inability to carry out joint testing of shear wave velocity and static penetration test in water areas. Therefore, there is an urgent need to develop a static penetration test probe test system that can integrate seismic wave excitation and reception. Summary of the Invention

[0004] The purpose of the present invention is to provide a self-retractable seismic wave static penetration test system and method based on bionic design. By integrating the excitation source on the probe, high-precision and stable shear wave velocity and static penetration testing can be achieved simultaneously, so as to expand the application scenarios of seismic wave static penetration in complex environments such as water areas or deep land areas.

[0005] The purpose of the present invention can be achieved by the following technical solutions:

[0006] In one aspect, the present invention provides a self-retractable seismic wave static penetration testing system based on bionic design, comprising:

[0007] A self-retractable seismic wave static penetration probe based on a bionic design includes a probe front end, a probe tail, and an umbilical cable connecting the probe front end and the probe tail. The probe tail can move up and down along the umbilical cable. The probe front end includes a probe cone tip, a friction sleeve with the lower end connected to the probe cone tip, and a seismic wave detector, a force sensor, and a pore pressure sensor arranged in the friction sleeve and connected to the umbilical cable signal. The probe tail is provided with a seismic wave exciter.

[0008] The control and data acquisition system includes a data acquisition instrument connected in sequence to the upper end of the umbilical cable and a data display and processing terminal.

[0009] Reptiles (such as earthworms and snakes) can expand and contract their size during their peristalsis, allowing them to explore different environments. Inspired by this biological characteristic and the requirement for a certain distance between the excitation and receiving devices (i.e., the seismic wave exciter and seismic wave detector) during seismic wave testing, the present invention adds a seismic wave exciter to the upper part of a traditional seismic wave probe (i.e., the probe tail) and adopts a retractable structure to achieve the integration of the excitation device and the seismic wave probe.

[0010] Furthermore, the tail of the probe is slidably mounted on the umbilical cable. Specifically, the sliding travel range of the tail of the probe on the umbilical cable is 30 cm, that is, the lifting distance threshold is 30 cm.

[0011] Furthermore, a probe internal limiter is provided between the front end and the rear end of the probe to control the connection and fixation or relative separation between the front end and the rear end of the probe.

[0012] Specifically, the probe's internal stopper consists of two magnetic blocks, one of which is fixed to the probe's tail and the other connected to the probe's front end via a spring. A magnetic block, which can be opened and closed, is located near the base of the spring. The magnetic block is responsible for separating and closing the upper and lower parts of the probe (i.e., the probe's tail and front end). The spring, etc., can drive the magnetic block to move to ensure that the interior of the stopper is protected from water and soil intrusion. When the data display and processing terminal issues a seismic wave test command, the magnetic force of the magnetic block disappears, and the probe rod is lifted, separating the upper and lower parts of the probe until the seismic wave test distance is reached. The spring drives the magnetic block located below to move upward along with the lifting probe rod until it fills the groove vacated by the upward movement of the probe's tail, preventing water and soil intrusion into the stopper and affecting probe closure. After the test is completed, the probe is pressed down until the magnetic block located below and the spring are compressed to the specified position. The magnetic block then regains its magnetic force, securing the two magnetic blocks. At this point, the magnetically closed state allows the probe to be pulled out as a whole, preventing damage to the connecting umbilical cable caused by the lifting and separation. This allows the entire test system to telescope along the umbilical cable, enabling static penetration testing in the retracted state and shear wave testing in the extended state. Furthermore, a sealing ring is used at the connection between the probe's internal stopper and the probe's front end for waterproofing.

[0013] Furthermore, the umbilical cable is composed of a rubber isolation membrane, a supporting steel column and a signal line, wherein the signal line is used to connect the acquisition instrument with the seismic wave detector, the force sensor and the pore pressure sensor. Specifically, the rubber isolation membrane is used to isolate the direct contact between the earthquake source excited by the seismic wave exciter and the seismic wave detector, thereby eliminating the influence of the tube wave on the test. For example, its thickness can be 5mm; the supporting steel column provides support for the umbilical cable to ensure the stiffness of the retractable probe when scaling; and the signal line is used for signal transmission between the probe and the acquisition equipment. The rubber isolation membrane is wrapped around the outermost periphery, the signal line is located in the center of the umbilical cable, and the supporting steel column is located between the rubber isolation membrane and the signal line. The outer rubber isolation membrane can isolate the direct contact between the earthquake source and the seismic wave detector, thereby eliminating the influence of the tube wave on the test.

[0014] Furthermore, the seismic wave exciter is a single pulse generator with a frequency of 1-1000 Hz. Furthermore, the seismic wave detector is a high-precision three-axis accelerometer, which can be a MEMS accelerometer with a bandwidth of 1.8 Hz.

[0015] Furthermore, a filter ring is provided between the probe cone tip and the friction sleeve.

[0016] In another aspect, the present invention provides a biomimetic design-based self-expanding seismic wave static penetration test method, which is implemented based on any of the biomimetic design-based self-expanding seismic wave static penetration test systems described above, and the test method comprises the following steps:

[0017] (1) Relying on the static cone penetration equipment, the self-retractable seismic wave static cone penetration probe based on bionic design is connected to the end of the probe rod to penetrate into the soil and record the penetration depth;

[0018] (2) During the penetration process of static penetration, the mechanical response of the soil layer is transmitted to the force sensor and pore water stress sensor through the probe cone tip, friction sleeve, and filter ring respectively, and then transmitted to the acquisition instrument by the umbilical cable to draw the implementation curve at the data display and processing terminal;

[0019] (3) During the seismic wave test, the penetration of the probe rod is suspended, and the data display and processing terminal issues a wave velocity test instruction. The static penetration equipment lifts the probe rod, driving the tail of the probe to move up along the umbilical cable to the specified height. The data display and processing terminal issues an instruction to stop lifting the probe rod;

[0020] (4) The data display and processing terminal issues a start command for the wave velocity test, controls the seismic wave exciter to emit a seismic wave signal, and the seismic wave signal is transmitted to the seismic wave detector through the soil. After the seismic wave detector receives the signal, it is transmitted to the acquisition instrument through the signal line in the umbilical cable to record the response depth seismic wave waveform. The obtained seismic wave signal is subjected to noise reduction and calculation by the data display and processing terminal to obtain the time difference ΔT of the seismic wave arrival, and finally a complete static penetration test and seismic wave data profile of the water section are obtained, completing the test of soil layer properties.

[0021] Compared with the prior art, the present invention has the following advantages:

[0022] 1. A self-retractable seismic wave static penetration test system based on bionic design is proposed. Based on the mechanism of the ribs of reptiles such as snakes driving the back-and-forth movement of the rigid-flexible system of ventral scales, the probe's excitation and receiving parts (i.e., the seismic wave exciter and seismic wave detector, respectively) can be relatively displaced over a limited distance when connected by an umbilical cable. Seismic wave testing is achieved in the extended state, and static penetration testing is achieved in the retracted state. The present invention does not require a ground source, which can overcome the problem of seismic wave excitation in water areas. It can realize integrated seismic wave and static penetration surveys in land (water) areas, greatly reducing survey time and costs.

[0023] 2. It innovatively solves the difficulty of conducting SCPT seismic wave testing in deep soil. By using a retractable excitation device to provide a seismic wave excitation source deep in the soil, there is no need to worry about energy attenuation caused by the ground source being too far away from the sensor. At the same time, the system stiffness and penetration capacity of conventional CPT penetration are guaranteed.

[0024] 3. The static penetration hole expansion process can always maintain close contact with the hole wall, without the need for grouting or air filling of the borehole as in the suspended wave velocity test method, thus improving the convenience and accuracy of the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 Schematic diagram of the self-retractable seismic wave static penetration test system based on bionic design;

[0026] Figure 2 Schematic diagram of the self-retractable seismic wave probe based on biomimetic design in the contracted state (penetrated state) of the present invention;

[0027] Figure 3 Schematic diagram of the self-retractable seismic wave probe based on biomimetic design in the extended state (wave velocity testing state) of the present invention;

[0028] Figure 4 Schematic diagram of the cross section of the umbilical cable;

[0029] Figure 5 Schematic diagram of the longitudinal section of the limiter structure;

[0030] Description of the marks in the figure:

[0031] 1- friction sleeve, 2- filter ring, 3- probe cone tip, 4- umbilical cable, 41- signal line, 42- rubber isolation membrane, 43- supporting steel column, 5- seismic wave exciter, 6- probe internal limiter, 61- magnetic block, 62- spring, 63- magnetic material block, 64- limiter cavity, 7- sealing ring, 8- seismic wave detector, 9- force sensor, 10- pore pressure sensor, 11- acquisition instrument, 12- data display and processing terminal. DETAILED DESCRIPTION

[0032] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0033] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0034] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0035] In the following implementation manners or examples, unless otherwise specified, functional components or structures are conventional components or conventional structures used in the art to achieve corresponding functions.

[0036] In order to achieve high-precision and stable simultaneous testing of shear wave velocity and static penetration, and to expand the use of seismic wave static penetration in complex environments such as water or deep land, the present invention provides a self-retractable seismic wave static penetration test system based on bionic design, see Figures 1 to 4 Shown, including:

[0037] A self-retractable seismic wave static penetration probe based on a bionic design includes a probe front end, a probe tail, and an umbilical cable 4 connecting the probe front end and the probe tail. The probe tail can move up and down along the umbilical cable 4. The probe front end includes a probe cone tip 3, a friction sleeve 1 connected to the probe cone tip 3 at its lower end, and a seismic wave detector 8, a force sensor 9, and a pore pressure sensor 10 arranged in the friction sleeve 1 and connected to the umbilical cable 4 signal. The probe tail is provided with a seismic wave exciter 5;

[0038] The control and data acquisition system includes a data acquisition instrument 11 connected in sequence to the upper end of the umbilical cable 4 and a data display and processing terminal 12 .

[0039] In some specific embodiments, the probe tail is slidably sleeved on the umbilical cable 4. Specifically, the sliding travel range of the probe tail on the umbilical cable 4 is 30 cm, that is, the lifting distance threshold is 30 cm.

[0040] In some specific embodiments, a probe internal stopper 6 is further provided between the front end and the rear end of the probe to control the connection, fixation or relative separation between the front end and the rear end of the probe. Figure 5As shown in the figure, the internal limiter 6 of the probe includes a limiter cavity 64 located at the upper end of the friction sleeve 1 at the front end of the probe and surrounding the umbilical cable 4, two magnetic material blocks 63 (which can be made of magnetic materials such as iron and nickel), a spring 62, and a magnetic block 61. One of the two magnetic material blocks 63 is fixed to the tail of the probe, and the other is connected to the front end of the probe through the spring 62. A magnetic block 61 that can be opened and closed is provided in the area near the bottom of the spring 62 in the limiter cavity 64. The magnetic block 61 can be controlled by a form similar to an electromagnet. When the data display and processing terminal 12 issues a seismic wave test instruction, the magnetic force disappears, the probe rod is lifted, and the upper and lower parts of the probe are separated until the seismic wave test distance is reached. The spring 62 pushes the magnetic material block 63 below to move upward along with the lifting probe rod until it fills the groove in the limiter cavity 64 vacated by the upward movement of the probe tail, preventing water and soil intrusion and affecting the closure of the probe. After the test is completed, press the probe down until the magnetic material block 63 and the spring 62 located below are compressed to the specified position, and the magnetic block 61 restores the magnetic force and fixes the two magnetic material blocks 63. At this time, the magnetic block 61 restores the magnetic force and fixes the two magnetic material blocks 63. At this time, the magnetic closed state can make the upper and lower parts of the probe pulled out as a whole, avoiding damage to the umbilical cable 4 due to lifting and separation. In this way, the entire test system realizes static probing in the retracted state and shear wave testing in the extended state. In a more specific embodiment, the connection between the internal limiter 6 of the probe and the front end of the probe is waterproofed with a sealing ring 7.

[0041] In some specific embodiments, the umbilical cable 4 is composed of a signal line 41, a rubber isolation membrane 42 and a signal line support steel column 43, wherein the signal line 41 is used to connect the collector with the seismic wave detector 8, the force sensor 9 and the pore pressure sensor 10. Specifically, the rubber isolation membrane 42 is used to eliminate the influence of tube waves on the test. For example, its thickness can be 5mm; the support steel column 43 provides support for the umbilical cable 4 to ensure the stiffness of the retractable probe when scaling; and the signal line 41 is used for signal transmission between the probe and the acquisition device. It should be pointed out here that the process of collecting, transmitting, and processing data signals through the collector 11, the signal line 41 and the data display and processing terminal 12 are all conventional technologies in this field and do not involve the innovative invention of the present invention, so they will not be repeated here.

[0042] In some specific implementations, the seismic wave exciter 5 is a single pulse generator with a frequency of 1-1000 Hz.

[0043] In some specific implementations, the seismic wave detector 8 uses a MEMS accelerometer with a bandwidth of 1.8 Hz.

[0044] In some specific embodiments, a filter ring 2 is further provided between the probe cone tip 3 and the friction sleeve 1. The above embodiments can be implemented individually or in any combination of two or more.

[0045] The above implementation is described in more detail below with reference to specific examples.

[0046] Example 1:

[0047] To achieve high-precision, stable shear wave velocity and static penetration testing simultaneously, and to expand the use of seismic wave static penetration testing in complex environments such as water or deep land, this embodiment provides a self-retractable seismic wave static penetration testing system based on bionic design. Figures 1 to 4 As shown, including:

[0048] A self-retractable seismic wave static penetration probe based on a bionic design includes a probe front end, a probe tail, and an umbilical cable 4 connecting the probe front end and the probe tail. The probe tail can move up and down along the umbilical cable 4. The probe front end includes a probe cone tip 3, a friction sleeve 1 connected to the probe cone tip 3 at its lower end, and a seismic wave detector 8, a force sensor 9, and a pore pressure sensor 10 arranged in the friction sleeve 1 and connected to the umbilical cable 4 signal. The probe tail is provided with a seismic wave exciter 5;

[0049] The control and data acquisition system includes a data acquisition instrument 11 connected in sequence to the upper end of the umbilical cable 4 and a data display and processing terminal 12 .

[0050] The probe tail is slidably sleeved on the umbilical cable 4. Specifically, the sliding travel range of the probe tail on the umbilical cable 4 is 30 cm, that is, the lifting distance threshold is 30 cm.

[0051] A probe internal stopper 6 is also provided between the front end and the rear end of the probe to control the connection, fixation or relative separation between the front end and the rear end of the probe. Figure 5As shown in the figure, the internal limiter 6 of the probe includes a limiter cavity 64 located at the upper end of the friction sleeve 1 at the front end of the probe and surrounding the umbilical cable 4, two magnetic material blocks 63 (which can be made of magnetic materials such as iron and nickel), a spring 62, and a magnetic block 61. One of the two magnetic material blocks 63 is fixed to the tail of the probe, and the other is connected to the front end of the probe through the spring 62. A magnetic block 61 that can be opened and closed is provided in the area near the bottom of the spring 62 in the limiter cavity 64. The magnetic block 61 can be controlled by a form similar to an electromagnet. When the data display and processing terminal 12 issues a seismic wave test instruction, the magnetic force disappears, the probe rod is lifted, and the upper and lower parts of the probe are separated until the seismic wave test distance is reached. The spring 62 pushes the magnetic material block 63 below to move upward along with the lifting probe rod until it fills the groove in the limiter cavity 64 vacated by the upward movement of the probe tail, preventing water and soil intrusion and affecting the closure of the probe. After the test is completed, the probe is pressed down until the magnetic material block 63 and spring 62 located below are compressed to the specified position. The magnetic block 61 restores its magnetic force and fixes the two magnetic material blocks 63. At this time, the magnetic block 61 restores its magnetic force and fixes the two magnetic material blocks 63. At this time, the magnetic attraction is closed and the upper and lower parts of the probe can be pulled out as a whole, avoiding damage to the umbilical cable 4 caused by lifting and separation. In this way, the entire test system can realize static penetration testing in the retracted state and shear wave testing in the extended state.

[0052] The connection between the probe's internal stopper 6 and the front end of the probe is waterproofed with a sealing ring 7.

[0053] Please see again Figure 4 As shown, the umbilical cable 4 consists of a signal line 41, a rubber isolation membrane 42, and a supporting steel column 43. The signal line 41 is used to connect the collector to the seismic wave detector 8, force sensor 9, and pore pressure sensor 10. Specifically, the rubber isolation membrane 42 is used to eliminate the impact of tube waves on the test. For example, its thickness can be 5mm. The supporting steel column 43 provides support for the umbilical cable 4, ensuring the rigidity of the retractable probe during expansion and contraction. The signal line 41 is used for signal transmission between the probe and the collection equipment.

[0054] In this embodiment, the seismic wave exciter 5 adopts a single pulse generator with a frequency of 1-1000Hz; the seismic wave detector 8 adopts a MEMS accelerometer with a bandwidth of 1.8Hz; a filter ring 2 is also provided between the probe cone tip 3 and the friction sleeve 1. The filter ring 2 is a soil-proof and water-permeable module for pore pressure measurement and is arranged at the tail of the probe cone tip.

[0055] Relying on a platform-type penetration device for water (land), a probe rod is connected to a biomimetic self-retractable seismic wave probe to penetrate the soil. During penetration, a depth gauge simultaneously records the penetration depth. During the static penetration test, the mechanical response of the soil layer is transmitted to the force sensor 9 and pore water stress sensor 9 respectively through the probe cone tip 3, friction sleeve 1, and filter ring 2. The response is then transmitted to the data acquisition instrument 11 via the umbilical cable 4, and the implementation curve is then plotted on the data display and processing terminal 12. The data display and processing terminal 12 can execute test commands such as dissipation. During the seismic wave test, the probe rod penetration is paused, and the data display and processing terminal 12 issues a wave velocity test command. The magnetic block 61 is demagnetized and unlocked. The static penetration test device raises the probe rod, and the probe is connected via the umbilical cable 4 to separate the end and tail. At this time, the spring 62 rebounds to prevent water and soil from affecting the closure of the component. After reaching the specified length (30 cm), the data display and processing terminal 12 issues a command to stop lifting the probe rod. It is worth noting that the lifting action does not change the absolute position of the end part of the probe, but only changes the relative position of the probe tail structure and the soil, and has no effect on the subsequent penetration of the static penetration. Subsequently, the data acquisition terminal sends a wave velocity test start instruction through the seismic wave excitation module. At this time, the seismic wave exciter 5 sends a seismic wave signal, and the emitted seismic wave is transmitted along the hole wall to the seismic wave detector 8. The rubber isolation membrane 42 of the umbilical cable 4 can effectively prevent the transmission of tube waves and prevent tube waves from interfering with the interpretation of the results. After receiving the signal, the seismic wave detector 8 passes it to the acquisition instrument 11 to record the response depth seismic wave waveform. The obtained seismic wave signal is denoised and calculated by the data display and processing terminal 12, and the cross-correlation method is used to obtain the time difference ΔT of the arrival of the seismic wave. The calculation of the shear wave velocity can be achieved by the following formula:

[0056]

[0057] Among them, ΔH is the distance from the seismic wave exciter to the seismic wave detector after the self-retractable shear wave velocity probe based on bionic design is lifted, which is 30cm in this embodiment; ΔT is the time difference of the arrival of the seismic wave. The shear wave velocity test process may be affected by random noise, resulting in misjudgment of the wave arrival time. Therefore, the data display and processing terminal can further use the existing deep learning algorithm to reduce the noise of the seismic wave, and use the cross-correlation method to extract the wave velocity arrival time to eliminate the error caused by human judgment. The static penetration data recording interval is 0.05m, and the seismic wave profile interval depth is related to the engineering requirements, and 1m is recommended. After the test is set to a specified depth, the complete static penetration and seismic wave data profile of the water area profile can be obtained, and the soil layer properties can be further obtained.

[0058] The above description of the embodiments is intended to facilitate understanding and use of the invention by those skilled in the art. It will be apparent that those skilled in the art can readily make various modifications to these embodiments and apply the general principles described herein to other embodiments without requiring inventive effort. Therefore, the present invention is not limited to the above-described embodiments. Improvements and modifications made by those skilled in the art based on the disclosure of the present invention, without departing from the scope of the present invention, should be within the scope of protection of the present invention.

Claims

1. A self-expanding seismic wave static penetration test system based on bionic design, characterized in that: include: A self-retractable seismic wave static penetration probe comprises a probe front end, a probe tail, and an umbilical cable connecting the probe front end and the probe tail. The probe tail is configured to move up and down along the umbilical cable. The probe front end comprises a probe cone tip, a friction sleeve with a lower end connected to the probe cone tip, and a seismic wave detector, a force sensor, and a pore pressure sensor arranged in the friction sleeve and connected to the umbilical cable signal. The probe tail is provided with a seismic wave exciter. A control and data acquisition system comprising a data acquisition instrument connected in sequence to the upper end of the umbilical cable, and a data display and processing terminal; The tail of the probe is slidably sleeved on the umbilical cable; A probe internal stopper is provided between the front end and the rear end of the probe, which is configured to control the connection, fixation or relative separation between the front end and the rear end of the probe; a magnetic block is provided on the top of the internal stopper of the probe to achieve magnetic fixation between the front end and the rear end of the probe; when the data display and processing terminal issues a seismic wave test instruction, the magnetic force disappears, and the front end and the rear end of the probe are released; The umbilical cable consists of a rubber isolation membrane, a supporting steel column and a signal line, wherein the signal line is located in the center position, the rubber isolation membrane wraps the signal line and is located at the outermost side, the supporting steel column is located between the rubber isolation membrane and the signal line, and the signal line is used to connect the collector with the seismic wave detector, force sensor, and pore pressure sensor.

2. The self-expanding seismic wave static penetration testing system based on bionic design according to claim 1 is characterized in that: The connection between the internal stopper of the probe and the front end of the probe is waterproofed by a sealing ring.

3. The self-expanding seismic wave static penetration testing system based on bionic design according to claim 1 is characterized in that: The seismic wave exciter adopts a single pulse generator with a frequency of 1-1000 Hz.

4. The self-expanding seismic wave static penetration testing system based on bionic design according to claim 1 is characterized in that: The seismic wave detector adopts a MEMS accelerometer with a bandwidth of 1.8 Hz.

5. The self-expanding seismic wave static penetration testing system based on bionic design according to claim 1 is characterized in that: A filter ring is further provided between the probe cone tip and the friction sleeve.

6. A biomimetic design-based self-expanding seismic wave static penetration test method, which is implemented based on the biomimetic design-based self-expanding seismic wave static penetration test system according to any one of claims 1 to 5, characterized in that: The test methods include static penetration and seismic wave testing; The static penetration test comprises the following steps: (A) Relying on a static cone penetration device, the self-retractable seismic wave static cone probe is connected to the end of the probe rod to penetrate into the soil and record the penetration depth; (B) During the penetration process of static cone penetration, the mechanical response of the soil layer is transmitted to the force sensor and pore water stress sensor through the probe cone tip, friction sleeve, and filter ring, respectively. The response is then transmitted to the data acquisition instrument via the umbilical cable, and the implementation curve is then plotted on the data display and processing terminal. The seismic wave test comprises the following steps: (a) During the seismic wave test, after the self-retractable seismic wave static cone penetration probe is penetrated into the soil to a specified depth by means of a static cone penetration device, the penetration of the probe rod is suspended; the depth of the front end of the probe in the soil is maintained constant, the static cone penetration device is controlled to lift the probe rod, and the tail of the probe is driven to move up along the umbilical cable to a specified height, and the data display and processing terminal issues a command to stop lifting the probe rod; (b) The data display and processing terminal issues a command to start the wave velocity test, controlling the seismic wave exciter to emit a seismic wave signal. The seismic wave signal is transmitted through the soil to the seismic wave detector. After the seismic wave detector receives the signal, it is transmitted to the acquisition instrument via the signal line in the umbilical cable to record the seismic wave waveform at the response depth. The obtained seismic wave signal is subjected to noise reduction and calculation by the data display and processing terminal to obtain the time difference ΔT of the seismic wave arrival. Finally, a complete static penetration test and seismic wave data profile of the deep soil layer are obtained, completing the test of the soil layer properties.

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