Self-telescopic seismic wave static sounding test system and method based on bionic design

Abstract

The invention relates to a self-telescopic seismic wave static sounding test system and method based on bionic design, the test system comprises a self-telescopic seismic wave static sounding probe, the self-telescopic seismic wave static sounding probe comprises a probe front end, a probe tail part and an umbilical cable connecting the probe front end and the probe tail part, the probe tail part can move up and down along the umbilical cable, and the self-telescopic seismic wave static sounding probe is connected with the umbilical cable; the probe front end comprises a probe conical tip, a friction sleeve, and a seismic wave detector, a force sensor and a pore pressure sensor which are in signal connection with the umbilical cable, and the tail part is provided with a seismic wave detector; and the control and data acquisition system comprises an acquisition instrument and a data display and processing terminal. Through connection of the flexible umbilical cable, the problem that a deep soil mass seismic source is difficult to excite in seismic wave static sounding in water areas such as oceans and rivers or complex geological environments such as frozen earth areas can be solved, common investigation of wave velocity testing and static sounding testing is achieved by means of a seismic wave excitation-receiving system, and the investigation efficiency is greatly improved.

Description

Technical Field

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

[0002] Shear wave velocity is one of the important parameters for site investigation. It has a clear physical meaning and can provide important information about underground medium characteristics, earthquake impact, geological disaster risk and geotechnical structure stability. Shear wave velocity can be obtained through indoor tests and in-situ tests. Indoor tests are obtained through indoor test methods such as bending elements and resonant columns, but the test accuracy is significantly affected by the sampling quality. For cohesive soil, sampling requires high-cost methods such as liquid nitrogen freezing, making it difficult to obtain accurate results. At the same time, size effects, indoor test methods and operating procedures will cause the test results to deviate seriously from their true values. Shear wave velocity can also be obtained through in-situ test methods, such as seismic wave static penetration, seismic wave lateral pressure meter, downhole wave velocity test, multi-channel transient surface wave method and other methods. Among them, seismic wave static penetration is widely used due to its high precision, continuous data and good repeatability. Compared with conventional wave velocity testing devices, seismic wave static penetration testing can also realize functions such as fine stratification of soil, prediction of geotechnical parameters, and liquefaction identification. It integrates the advantages of shear wave velocity and static penetration testing, and its functionality and usage scenarios are also richer.

[0003] Seismic wave static penetration test (SCPTU) has been used relatively maturely 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 disturbed by environmental noise in complex environments. The test results are inaccurate when the geological environment is complex, such as frozen soil. 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, stable shear wave velocity and static penetration testing can be achieved simultaneously, so as to expand the use 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 test system based on bionic design, comprising:

[0007] A self-retractable seismic wave static penetration probe based on bionic design, comprising a probe front end, a probe tail, and an umbilical cable connecting the probe front end and the probe tail, wherein the probe tail can move up and down along the umbilical cable, the probe front end comprises a probe cone tip, a friction sleeve connected to the probe cone tip at the lower end, 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, and the probe tail is provided with a seismic wave exciter;

[0008] The control and data acquisition system comprises 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, snakes, etc.) can expand and contract their own size during the process of crawling to explore different environments. Inspired by this biological characteristic, combined with the requirement that the excitation and receiving devices (i.e., the seismic wave exciter and the seismic wave detector) must be at a certain distance during the seismic wave test, the present invention adds a seismic wave exciter to the upper part of the traditional seismic wave probe (i.e., the tail of the probe), and adopts a retractable structure to realize 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 of the probe and the rear end of the probe to control the connection and fixation or relative separation between the front end of the probe and the rear end of the probe.

[0012] Specifically, the internal stopper of the probe includes two magnetic material blocks, one of which is fixed to the tail of the probe, and the other is connected to the front end of the probe through a spring. A magnetic suction block that can be opened and closed is provided in the area near the bottom of the spring. The magnetic suction block is responsible for the separation and closure of the upper and lower parts of the probe (i.e., the tail of the probe and the front end of the probe), and the spring can drive the magnetic material block to move to ensure that the inside of the stopper is not invaded by water and soil. When the data display and processing terminal issues a seismic wave test instruction, the magnetic force of the magnetic suction block disappears, and the probe rod is lifted up, so that the upper and lower parts of the probe are separated until the seismic wave test distance is reached. The spring drives the magnetic material block located below to move up with the lifting probe rod until the groove vacated by the upward movement of the tail of the probe is filled, preventing water and soil from invading the inside of the stopper and affecting the closure of the probe. After the test is completed, the probe is pressed down until the magnetic material block and the spring located below are compressed to the specified position, and the magnetic suction block restores the magnetic force and fixes the two magnetic material blocks. At this time, the magnetic suction closed state can pull out the probe as a whole, avoiding damage to the connecting umbilical cable due to lifting and separation. In this way, the entire test system can complete the telescopic action along the umbilical cable, realize static penetration in the retracted state, and realize shear wave testing in the extended state. Furthermore, the connection between the internal stopper of the probe and the front end of the probe is waterproofed with a sealing ring.

[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 source excited by the seismic wave exciter and the seismic wave detector, thereby eliminating the influence of the tube wave on the test. Exemplarily, 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 part, 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 source and the seismic wave detector, thereby eliminating the influence of the tube wave on the test.

[0014] Further, the seismic wave exciter adopts a single pulse generator with a frequency of 1-1000 Hz. Further, 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] On the other hand, the present invention provides a self-expanding seismic wave static penetration test method based on bionic design, which is implemented based on any of the self-expanding seismic wave static penetration test systems based on bionic design as 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 data 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 command. The static penetration equipment lifts the probe rod, driving the tail of the probe to move up along the umbilical cable to a specified height. The data display and processing terminal issues a command to stop lifting the probe rod;

[0020] (4) 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 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 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, and finally the complete static penetration test and seismic wave data profile of the water area section are obtained to complete 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. The system is designed based on the mechanism that the ribs of reptiles such as snakes drive the rigid-flexible system of the ventral scales to move forward and backward, so that the excitation part and the receiving part of the probe (i.e., the seismic wave exciter and the seismic wave detector, respectively) can be relatively displaced over a limited distance under the connection of the umbilical cable, and the seismic wave test can be realized in the extended state, and the static penetration test can be realized in the retracted state; the present invention does not require a ground source, can overcome the problem that seismic waves cannot be excited in water areas, can realize the integrated survey of seismic waves and static penetration in land (water areas), and greatly shorten the survey time and cost;

[0023] 2. The problem of SCPT seismic wave testing in deep soil is innovatively solved. The retractable excitation device provides a seismic wave excitation source deep in the soil, so 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 bionic 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 bionic design in the extended state (wave velocity test state) of the present invention;

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

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

[0030] Description of the markings in the figure:

[0031] 1-friction sleeve, 2-filter ring, 3-probe cone tip, 4-umbilical cable, 41-signal line, 42-rubber seismic isolation membrane, 43-support steel column, 5-seismic wave exciter, 6-probe internal limiter, 61-magnetic suction 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-collector, 12-data display and processing terminal. DETAILED DESCRIPTION

[0032] The present invention is described in detail below in conjunction with 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", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0034] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to 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, stable shear wave velocity and static penetration testing at the same time, and to expand the use of seismic wave static penetration testing in complex environments such as water or deep land, the present invention provides a self-retractable seismic wave static penetration testing system based on bionic design, please refer to Figures 1 to 4 As shown, including:

[0037] A self-retractable seismic wave static penetration probe based on bionic design, comprising a probe front end, a probe tail, and an umbilical cable 4 connecting the probe front end and the probe tail, wherein the probe tail can move up and down along the umbilical cable 4, the probe front end comprises a probe cone tip 3, a friction sleeve 1 connected to the probe cone tip 3 at the 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, and a seismic wave exciter 5 is provided at the probe tail;

[0038] The control and data acquisition system comprises 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 implementations, 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 implementations, a probe internal stopper 6 is further provided between the front end of the probe and the rear end of the probe to control the connection, fixation or relative separation between the front end of the probe and the rear end of the probe. Figure 5As shown in the figure, the internal stopper 6 of the probe includes a stopper 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 stopper 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 with the lifting probe rod until the groove in the stopper cavity 64 that is vacated due to the upward movement of the tail of the probe is filled to prevent water and soil intrusion and affect the closure of the probe. After the test is completed, press the probe downward 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 to fix the two magnetic material blocks 63. At this time, the magnetic block 61 restores the magnetic force to fix 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 implementation, 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, and its thickness can be 5mm by way of example; 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 the field, and do not involve the innovative invention of the present invention, and will not be repeated here.

[0042] In some specific implementations, the seismic wave exciter 5 uses 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 implementations, a filter ring 2 is further provided between the probe cone tip 3 and the friction sleeve 1. The above implementations may be implemented individually or in any combination of two or more.

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

[0046] Embodiment 1:

[0047] In order to achieve high-precision, stable shear wave velocity and static penetration testing at the same time, 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, see Figures 1 to 4 As shown, including:

[0048] A self-retractable seismic wave static penetration probe based on bionic design, comprising a probe front end, a probe tail, and an umbilical cable 4 connecting the probe front end and the probe tail, wherein the probe tail can move up and down along the umbilical cable 4, the probe front end comprises a probe cone tip 3, a friction sleeve 1 connected to the probe cone tip 3 at the 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, and a seismic wave exciter 5 is provided at the probe tail;

[0049] The control and data acquisition system comprises 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 tail of the probe is slidably sleeved on the umbilical cable 4. Specifically, the sliding travel range of the tail of the probe 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 of the probe and the rear end of the probe to control the connection, fixation or relative separation between the front end of the probe and the rear end of the probe. Figure 5As shown in the figure, the internal stopper 6 of the probe includes a stopper 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 stopper 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 with the lifting probe rod until the groove in the stopper cavity 64 that is vacated due to the upward movement of the tail of the probe is filled to prevent water and soil intrusion and affect the closure of the probe. After the test is completed, the probe is pressed down until the magnetic material block 63 and the spring 62 at the bottom are compressed to the specified position, and the magnetic block 61 restores the magnetic force to fix the two magnetic material blocks 63. At this time, the magnetic block 61 restores the magnetic force to fix the two magnetic material blocks 63. At this time, the magnetic closed state can make the upper and lower parts of the probe 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 realizes static penetration in the retracted state and shear wave testing in the extended state.

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

[0053] Please see again Figure 4 As shown, the umbilical cable 4 is composed of a signal line 41, a rubber seismic isolation membrane 42 and a supporting 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 seismic isolation membrane 42 is used to eliminate the influence of the tube wave on the test, and its thickness can be 5mm by way of example; the supporting steel column 43 provides support for the umbilical cable 4 to ensure the rigidity of the retractable probe when scaling; and the signal line 41 is used for signal transmission between the probe and the acquisition device.

[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, and the filter ring 2 is a soil-isolating and water-permeable module for pore pressure measurement, which is arranged at the tail of the probe cone tip.

[0055] Relying on the platform-type penetration equipment in the water area (land area), the self-retractable seismic wave probe based on bionic design is connected to the probe rod to implement penetration into the soil. While penetrating, the depth gauge also records the penetration depth. During the static penetration, the mechanical response of the soil layer is transmitted to the force sensor 9 and the pore water stress sensor 9 respectively through the probe cone tip 3, the friction sleeve 1 and the filter ring 2, and then transmitted to the acquisition instrument 11 by the umbilical cable 4, and then the implementation curve is drawn 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 penetration of the probe rod is suspended, and the data display and processing terminal 12 issues a wave velocity test instruction, the magnetic suction block 61 is demagnetized and unlocked, and the static penetration equipment lifts the probe rod, and the probe is connected through the umbilical cable 4 to achieve the separation of the end and the 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 (30cm), the data display and processing terminal 12 issues an instruction to stop lifting the probe rod at this moment. 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 tail structure of the probe 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 seismic 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 transmits 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 waves, and use the cross-correlation method to extract the wave velocity arrival time to eliminate the errors caused by human judgment. The static penetration data recording interval is 0.05m, and the seismic wave profile interval depth is related to 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 to facilitate the understanding and use of the invention by those skilled in the art. It is obvious that those skilled in the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative work. Therefore, the present invention is not limited to the above embodiments, and 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-retractable seismic wave static penetration test system based on bionic design, characterized in that: include: A self-retractable seismic wave static penetration probe, comprising a probe front end, a probe tail, and an umbilical cable connecting the probe front end and the probe tail, wherein the probe tail is configured to be movable up and down along the umbilical cable, the probe front end comprises a probe cone tip, a friction sleeve connected to the probe cone tip at the lower end, 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, and the probe tail is provided with a seismic wave exciter; The control and data acquisition system comprises a data acquisition instrument connected in sequence to the upper end of the umbilical cable and a data display and processing terminal.

2. The self-retractable seismic wave static penetration test system based on bionic design according to claim 1 is characterized in that: The tail of the probe is slidably sleeved on the umbilical cable.

3. The self-retractable seismic wave static penetration test system based on bionic design according to claim 1 is characterized in that: A probe internal stopper is also provided between the front end of the probe and the rear end of the probe, and is configured to control the connection and fixation or relative separation between the front end of the probe and the rear end of the probe.

4. The self-retractable seismic wave static penetration test system based on bionic design according to claim 3 is characterized in that: A magnetic block is also provided on the top of the internal limiter of the probe to realize magnetic fixation between the front end and the tail end of the probe; when the data display and processing terminal issues a seismic wave test instruction, the magnetic force disappears, and the fixation between the front end and the tail end of the probe is released.

5. The self-retractable seismic wave static penetration test system based on bionic design according to claim 3 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.

6. The self-retractable seismic wave static penetration test system based on bionic design according to claim 1 is characterized in that: The umbilical cable consists of a rubber isolation membrane, a supporting steel column and a signal line, wherein the signal line is located at the center, 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.

7. The self-retractable seismic wave static penetration test 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.

8. The self-retractable seismic wave static penetration test system based on bionic design according to claim 1 is characterized in that: The seismic wave detector adopts a MEMS accelerometer, and its bandwidth is 1.8 Hz.

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

10. A self-expanding seismic wave static penetration test method based on bionic design, which is implemented based on the self-expanding seismic wave static penetration test system based on bionic design as claimed in any one of claims 1 to 9, characterized in that: The test methods include static penetration and seismic wave testing: Wherein, the static penetration test comprises the following steps: (A) Relying on the static cone penetration equipment, 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 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 data acquisition instrument by the umbilical cable to draw the implementation curve at 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 penetration probe is penetrated into the soil to a specified depth by means of the static penetration device, the penetration of the probe rod is suspended; the depth of the front end of the probe in the soil is maintained unchanged, the static 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 an instruction 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 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 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, and finally a complete static penetration test and seismic wave data profile of the deep soil layer are obtained to complete the test of the soil layer properties.

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