A pore pressure static penetration probe capable of reducing uplift force

Abstract

The present invention relates to a pore pressure static penetration probe capable of reducing upward pulling force, comprising a probe rod and a cone tip, a cavity being provided inside the probe rod, a pore pressure filter ring being provided between the probe rod and the cone tip, an air supply pipe, a waterproof ring, a detection device, a one-way valve and a controller being provided in the cavity, the waterproof ring being provided at the upper end of the cavity, the air supply pipe passing through the waterproof ring being connected to an air source at one end and an exhaust pipe and an air vent at the other end, the exhaust pipe being connected to the air vent, and the air vent being provided at an annular position of the pore pressure filter ring; the detection device comprising an electronic vacuum gauge, the electronic vacuum gauge being electrically connected to the controller, the controller being electrically connected to the one-way valve, and the one-way valve being provided between the exhaust pipe and the air supply pipe. The present invention provides an air supply pipe, a detection device, a one-way valve and a controller, and when a negative pressure situation occurs when the probe rod is pulled up, the air supply pipe, the detection device, the one-way valve and the controller are automatically supplied with air into the hole through the air vent to destroy the negative pressure environment of the hole, thereby eliminating the suction force of the negative pressure on the cone tip, and achieving the effect of easily pulling out the probe rod.

Description

Technical Field

[0001] The invention relates to the technical field of soil layer detection, in particular to a piezocone penetration probe capable of reducing upward pulling force. Background Art

[0002] Clay is widely distributed across China, including in the Yangtze River Basin, the coastal areas of South China, and the Central Plains. With the economic development of these regions and the increasing number of construction projects, various indicators of clay layers are becoming increasingly important. In geotechnical engineering, the CPTu (Pipeline Test) technique is often used to assess the mechanical properties, soil type, and interfacial structures of soil layers. When the CPTu test is completed in clay, a near-vacuum zone is formed below the cone tip, generating negative pressure. This results in a significant pullout force required to remove the drill rod, which is not efficient and effective.

[0003] Therefore, there is an urgent need for a structure that can break the negative pressure and quickly pull out the detection rod. Summary of the Invention

[0004] In order to solve the problem that the existing CPTu detection rod is difficult to pull out, the present invention provides a borehole pressure static penetration probe that can reduce the pulling force. A gas supply pipe, an exhaust pipe and an air vent are provided for connecting to an external gas source, and a one-way valve is provided for controlling the opening and closing of the gas supply pipe and the exhaust pipe. A detection device for detecting a negative pressure environment is provided, and a controller is provided to realize automatic control. When negative pressure (hole pressure is less than atmospheric pressure) occurs when the detection rod is pulled out, gas is supplied into the hole through the air vent to destroy the negative pressure environment of the hole, thereby eliminating the suction of the negative pressure on the cone tip, so that the detection rod can be easily pulled out.

[0005] In order to achieve the above-mentioned purpose, the present invention proposes a pore pressure static penetration probe capable of reducing the upward pulling force, comprising a detection rod and a cone tip, wherein the cone tip is arranged at the lower part of the detection rod, the detection rod is a cylindrical structure, and a side wall friction cylinder is arranged near the cone tip, the side wall friction cylinder is fixed to the outer ring surface of the detection rod, a cavity is opened inside the detection rod, a pore pressure filter ring is arranged between the detection rod and the cone tip, an air supply pipe, a waterproof ring, a detection device, a one-way valve and a controller are arranged in the cavity, the waterproof ring is arranged at the upper end of the cavity, the air supply pipe passes through the waterproof ring and is connected to an air source at one end, and is connected to an exhaust pipe and an air vent at the other end, the exhaust pipe is communicated with the air vent, and the air vent is opened at the annular surface position of the pore pressure filter ring;

[0006] The detection device includes an electronic vacuum gauge, the electronic vacuum gauge is electrically connected to a controller, the controller is electrically connected to a one-way valve, and the one-way valve is arranged between the exhaust pipe and the gas supply pipe.

[0007] Working principle: When the detection rod is pulled up, the structure of the hole, the detection rod and the cone tip is similar to that of a syringe. Unlike a normal syringe, the bottom surface of the hole is a sealing surface, so it is very laborious to pull up the detection rod and the cone tip. Similar to a vacuum state, a negative pressure environment is generated in the hole. In the invention, the detection rod is provided with a cavity, an air supply pipe and an exhaust pipe are arranged in the cavity, and an air vent is provided at the position of the hole pressure filter ring where the detection rod and the cone tip are combined. The number of air vents can be multiple. When the detection rod is pulled up, the lower end of the cavity is gradually in a vacuum state, and the electronic vacuum gauge performs vacuum detection. The one-way valve is opened by the controller, and the external gas is discharged into the hole from the air supply pipe through the exhaust pipe at the air vent position, thereby destroying the negative pressure environment of the hole. After the negative pressure environment disappears, the detection rod can be easily pulled out.

[0008] Furthermore, the cavity includes a first cavity, a second cavity and a third cavity, the first cavity is a cylindrical structure, the second cavity is a combined structure with a truncated cone at the upper end and a cylindrical lower end, and the third cavity is a cylindrical structure;

[0009] The gas pipe passes through the small-diameter end of the second cavity, the small-diameter end of the second cavity is closed, the first cavity, the second cavity and the third cavity are an integrated structure, and the first cavity, the second cavity and the third cavity are connected.

[0010] The first cavity, the second cavity and the third cavity are provided to facilitate installation of the detection device.

[0011] Furthermore, a one-way valve is provided at the connection position between the second cavity and the third cavity, and the one-way valve includes a limit plate, a baffle, a first bracket, a second bracket, a sealing ring, a spring, a travel switch and an electromagnet, wherein the first bracket is T-shaped, one side of the first bracket is a curved surface fixed to the inner annular surface of the lower end of the second cavity, and the other side of the first bracket is parallel to the frustum-shaped large diameter end of the second cavity, and the spring is fixedly provided in the vertical direction;

[0012] The other end of the spring is fixedly connected to a baffle, which is a disc-shaped plate made of ferromagnetic material. The baffle is arranged below the limit plate, which is a circular ring structure. The limit plate is arranged at the connection position of the second cavity and the third cavity and is fixed to the third cavity;

[0013] A sealing ring is provided at the contact position between the limit plate and the baffle, an electromagnet is provided at the lower part of the baffle, a second bracket is provided at the lower part of the electromagnet, the second bracket is T-shaped, one side of the second bracket is a curved surface fixed to the inner ring surface of the third cavity, and the other side is fixed with the electromagnet and is parallel to the baffle, and a travel switch is fixed at the upper end of the electromagnet.

[0014] Due to the long length of the probe rod, a gas pipe is installed in the first cavity to ensure that the gas reaches the vent quickly. The gas directly enters the second and third cavities. A one-way valve is installed between the second and third cavities. The one-way valve has an automatic reset function and a simple structure for easy operation.

[0015] Furthermore, the controller includes an MCU chip and a driving module, the ADC input end of the MCU chip is connected to the output end of the electronic vacuum gauge, the IO end of the MCU chip is connected to the input end of the driving module, the driving module is electrically connected to the electromagnet, and after the electromagnet is connected to the driving module, the travel switch is connected in series to the power supply to form a loop.

[0016] The control part adopts an embedded system with a simple circuit structure, providing a hardware foundation for realizing closed-loop control based on vacuum degree.

[0017] Furthermore, the detection device also includes a pore water pressure sensor and a cone tip resistance sensor. The pore water pressure sensor, cone tip resistance sensor and electronic vacuum gauge are arranged in the third cavity. An exhaust pipe is opened at the lower part of the third cavity, and the third cavity is connected to the pore pressure filter ring through the exhaust pipe.

[0018] The pore water pressure sensor measures the pore water pressure at that location through a pore pressure filter ring. By measuring the rate of change of the pore water pressure and combining it with Darcy's law and the permeability equation for pore water pressure, the soil's permeability coefficient is calculated. The cone tip resistance sensor measures the penetration resistance experienced by the cone tip.

[0019] Furthermore, the detection device further includes a side wall friction resistance sensor, wherein an irregular notch is provided at the connection portion between the surface of the detection rod and the side wall friction cylinder, and a protrusion is provided on the side wall friction cylinder corresponding to the notch, and the side wall friction resistance sensor is provided at the junction position between the notch of the detection rod and the protrusion of the side wall friction cylinder;

[0020] The sidewall friction sensor, pore water pressure sensor and cone tip resistance sensor are all pressure sensors, and the sidewall friction sensor, pore water pressure sensor and cone tip resistance sensor are electrically connected to the controller.

[0021] The sidewall friction sensor measures the friction force exerted on the sidewall friction cylinder.

[0022] Furthermore, the detection device further includes a gyroscope, which is disposed in the first cavity and is electrically connected to the controller.

[0023] According to the Code for Geotechnical Engineering Investigation (GB 50021), the maximum inclination angle of the CPT / CPTu probe rod should not exceed 1°, otherwise it will cause measurement errors. Therefore, a gyroscope is set to detect the inclination angle of the probe rod.

[0024] Furthermore, the detection device also includes a positioning module, which is arranged inside the cone tip and is electrically connected to the controller.

[0025] The positioning module uses a Beidou satellite navigation receiver to record the measured position and elevation.

[0026] Furthermore, the controller is electrically connected to a wireless transmission module, and the wireless transmission module includes one or more combinations of a Bluetooth module, a 5G module, and a WiFi module;

[0027] The wireless transmission module is disposed in the first cavity.

[0028] A wireless transmission module is set up to facilitate communication between the controller and external host equipment.

[0029] Furthermore, a waterproof and breathable membrane is provided on the outside of the vent hole.

[0030] The waterproof and breathable membrane effectively prevents water and sediment from entering the exhaust pipe through the air holes.

[0031] Through the above technical solution, the beneficial effects of the present invention are:

[0032] (1) The present invention has the advantage of being easy to pull out. The probe rod of the present invention is provided with a cavity. A pore pressure filter ring is provided between the probe rod and the cone tip. An air supply pipe is provided in the cavity. One end of the air supply pipe is connected to an air source, and the other end is connected to an exhaust pipe and an air vent. The exhaust pipe is connected to the air vent, and the air vent is provided on the annular surface of the pore pressure filter ring. When pulling out, the air source is opened to allow the gas to pass through the air supply pipe and the exhaust pipe and be discharged at the air vent, entering the hole at the cone tip, thereby destroying the negative pressure environment in the hole, thereby facilitating the easy pulling out of the probe rod.

[0033] (2) The opening and closing of the gas supply pipe and the exhaust pipe of the present invention are controllable and are controlled by the vacuum level. The present invention provides a detection device, a one-way valve, and a controller between the gas supply pipe and the exhaust pipe. The detection device is disposed within the cavity and is located near the pore pressure filter ring to detect the vacuum level. The controller adjusts the opening and closing state of the one-way valve based on the vacuum level detection value. The one-way valve has an automatic reset function.

[0034] The present invention injects compressed air to break the negative pressure environment around the cone tip, thereby reducing the negative tension when the probe rod is lifted, improving operation efficiency, reducing the wear of the probe rod during the lifting process, and also reducing the disturbance to the soil layer, further ensuring the accuracy of the measurement data, making CPTu operations more economical and quick. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1This is a schematic diagram of the structure of a piezocone penetration probe capable of reducing the upward pull-out force according to the present invention;

[0036] Figure 2 This is a second structural schematic diagram of a pore pressure static penetration probe capable of reducing the pull-out force of the present invention;

[0037] Figure 3 The electrical principle diagram of a pore pressure static penetration probe capable of reducing the upward pull-out force of the present invention is shown.

[0038] Figure numbers: 1 is the detection rod, 2 is the cone tip, 3 is the side wall friction cylinder, 4 is the pore pressure filter ring, 5 is the air supply pipe, 6 is the waterproof ring, 7 is the controller, 8 is the exhaust pipe, 9 is the air vent, 10 is the electronic vacuum gauge, 11 is the first cavity, 12 is the second cavity, 13 is the third cavity, 14 is the limit plate, 15 is the baffle, 16 is the first bracket, 17 is the second bracket, 18 is the sealing ring, 19 is the spring, 20 is the travel switch, 21 is the electromagnet, 22 is the pore water pressure sensor, 23 is the cone tip resistance sensor, 24 is the side wall friction resistance sensor, 25 is the gyroscope, 26 is the positioning module, and 27 is the wireless transmission module. DETAILED DESCRIPTION

[0039] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0040] Example 1

[0041] like Figures 1-3 As shown, a pore pressure static penetration probe capable of reducing the upward pulling force comprises a probe rod 1 and a cone tip 2, wherein the cone tip 2 is arranged at the lower part of the probe rod 1, the probe rod 1 is a cylindrical structure, and a side wall friction cylinder 3 is arranged near the cone tip 2, the side wall friction cylinder 3 is fixed to the outer ring surface of the probe rod 1, a cavity is provided inside the probe rod 1, a pore pressure filter ring 4 is provided between the probe rod 1 and the cone tip 2, an air supply pipe 5, a waterproof ring 6, a detection device, a one-way valve and a controller 7 are provided in the cavity, the waterproof ring 6 is provided at the upper end of the cavity, the air supply pipe 5 passes through the waterproof ring 6 at one end and is connected to the air source, and the other end is connected to the exhaust pipe 8 and the air vent 9, the exhaust pipe 8 is communicated with the air vent 9, and the air vent 9 is provided at the annular position of the pore pressure filter ring 4;

[0042] The detection device includes an electronic vacuum gauge 10 , which is electrically connected to a controller 7 , and the controller 7 is electrically connected to a one-way valve, which is provided between the exhaust pipe 8 and the gas supply pipe 5 .

[0043] Preferably, the cavity includes a first cavity 11, a second cavity 12 and a third cavity 13, the first cavity 11 is a cylindrical structure, the second cavity 12 is a combined structure with a truncated cone at the upper end and a cylindrical lower end, and the third cavity 13 is a cylindrical structure;

[0044] The gas pipe 5 passes through the small diameter end of the second cavity 12, and the small diameter end of the second cavity 12 is closed. The first cavity 11, the second cavity 12 and the third cavity 13 are an integrated structure, and the first cavity 11, the second cavity 12 and the third cavity 13 are connected.

[0045] like Figure 2 As shown preferably, a one-way valve is provided at the connection position of the second cavity 12 and the third cavity 13, and the one-way valve includes a limit plate 14, a baffle 15, a first bracket 16, a second bracket 17, a sealing ring 18, a spring 19, a travel switch 20 and an electromagnet 21. The first bracket 16 is T-shaped, one side of the first bracket 16 is a curved surface fixed to the inner annular surface of the lower end of the second cavity 12, and the other side of the first bracket 16 is parallel to the truncated cone-shaped large diameter end of the second cavity 12, and the spring 19 is fixedly provided in the vertical direction;

[0046] The other end of the spring 19 is fixedly connected to the baffle 15. The baffle 15 is a disc-shaped plate made of ferromagnetic material. The baffle 15 is arranged below the limit plate 14. The limit plate 14 is a circular ring structure. The limit plate 14 is arranged at the connection position of the second cavity 12 and the third cavity 13 and is fixed to the third cavity 13.

[0047] A sealing ring 18 is provided at the contact position between the limit plate 14 and the baffle 15, and an electromagnet 21 is provided at the lower part of the baffle 15. A second bracket 17 is provided at the lower part of the electromagnet 21. The second bracket 17 is T-shaped, and one side of the second bracket 17 is a curved surface fixed to the inner annular surface of the third cavity 13. The electromagnet 21 is fixedly provided on the other side and is parallel to the baffle 15. A travel switch 20 is fixedly provided at the upper end of the electromagnet 21.

[0048] Preferably, the controller 7 includes an MCU chip and a driving module, the ADC input end of the MCU chip is connected to the output end of the electronic vacuum gauge 10, the IO end of the MCU chip is connected to the input end of the driving module, the driving module is electrically connected to the electromagnet 21, and after the electromagnet 21 is connected to the driving module, the travel switch 20 is connected in series to the power supply to form a loop.

[0049] like Figure 3 As shown in this embodiment, the MCU chip is an STM32 single-chip microcomputer, and the driving module is a transistor driving circuit.

[0050] Preferably, the detection device also includes a pore water pressure sensor 22 and a cone tip resistance sensor 23. The pore water pressure sensor 22, the cone tip resistance sensor 23 and the electronic vacuum gauge 10 are arranged in the third cavity 13. An exhaust pipe 8 is opened at the lower part of the third cavity 13, and the third cavity 13 is connected to the pore pressure filter ring 4 through the exhaust pipe 8.

[0051] Preferably, the detection device further includes a side wall friction resistance sensor 24, an irregular notch is provided at the connection portion between the surface of the detection rod 1 and the side wall friction cylinder 3, and a protrusion is provided on the side wall friction cylinder 3 corresponding to the notch, and the side wall friction resistance sensor 24 is provided at the junction position between the notch of the detection rod 1 and the protrusion of the side wall friction cylinder 3;

[0052] The sidewall friction sensor 24 , the pore water pressure sensor 22 and the cone tip resistance sensor 23 are all pressure sensors, and the sidewall friction sensor 24 , the pore water pressure sensor 22 and the cone tip resistance sensor 23 are electrically connected to the controller 7 .

[0053] like Figure 3 As shown, the output ends of the pore water pressure sensor 22, the cone tip resistance sensor 23 and the side wall friction resistance sensor 24 are connected to the ADC input end of the MCU chip.

[0054] Preferably, the detection device further includes a gyroscope 25 , which is disposed in the first cavity 11 and is electrically connected to the controller 7 .

[0055] like Figure 3 As shown, the output end of the gyroscope 25 is connected to the ADC input end of the MCU chip.

[0056] Preferably, the detection device further includes a positioning module 26 , which is disposed inside the cone tip 2 and is electrically connected to the controller 7 .

[0057] like Figure 3 As shown, the output end of the positioning module 26 is connected to the MCU chip via the SPI serial port.

[0058] Preferably, the controller 7 is electrically connected to a wireless transmission module 27, and the wireless transmission module 27 includes one or more combinations of a Bluetooth module, a 5G module, and a WiFi module;

[0059] The wireless transmission module 27 is disposed in the first cavity 11 .

[0060] like Figure 3 As shown, the wireless transmission module 27 is connected to the MCU chip via a UART serial port. In this embodiment, the wireless transmission module 27 adopts a 5G module.

[0061] Preferably, a waterproof breathable membrane is provided outside the vent hole 9 .

[0062] The use of the probe rod and the pulling operation are described in conjunction with the above embodiment:

[0063] Before penetration, the positioning module 26 is used to determine and record the measurement position and elevation.

[0064] Under the penetration system settings (the drive control device for probe rod 1), cone tip 2 penetrates the clay at a constant rate of 2 cm / s. Sidewall friction sensor 24 measures the frictional resistance experienced by sidewall friction cylinder 3, pore water pressure sensor 22 measures the pore water pressure experienced by pore pressure filter ring 4, and cone tip resistance sensor 23 measures the penetration resistance experienced by cone tip 2.

[0065] During upward movement, when the electronic vacuum gauge 10 detects a vacuum exceeding 80%, the MCU chip controls the transistor drive circuit to conduct, energizing the electromagnet 21 to generate a strong magnetism that attracts the baffle 15 (made of ferromagnetic material) and moves it toward the electromagnet 21. This connects the second and third cavities 12, allowing air from the upper portion of the second cavity 12 to flow into the third cavity 13 and escape through the exhaust pipe 8 and vent 9, thus eliminating the negative pressure within the cavity. This reduces the pullout resistance of the probe rod 1, allowing it to be smoothly lifted.

[0066] When the baffle 15 moves to the position of the limit switch 20, the baffle 15 is attracted by the magnetic force and contacts the limit switch 20, causing the limit switch 20 to be disconnected. At this time, the electromagnet 21 loses power, and the attraction of the electromagnet 21 to the baffle 15 disappears. Since the first bracket 16 is fixed, the spring 19 pulls the baffle 15 back toward the limit plate 14 until the baffle 15 and the limit plate 14 are in contact.

[0067] The second cavity 12 and the third cavity 13 are in a closed state.

[0068] The embodiments described above are only preferred embodiments of the present invention and do not limit the scope of implementation of the present invention. Therefore, any equivalent changes or modifications made according to the structure, characteristics and principles described in the patent scope of the present invention should be included in the scope of the patent application of the present invention.

Claims

1. A pore pressure static penetration probe capable of reducing pull-out force, comprising a probe rod (1) and a cone tip (2), wherein the cone tip (2) is arranged at the lower part of the probe rod (1), the probe rod (1) is a cylindrical structure, and a side wall friction cylinder (3) is arranged near the cone tip (2), and the side wall friction cylinder (3) is fixed to the outer ring surface of the probe rod (1), characterized in that: A cavity is provided inside the detection rod (1), and a pore pressure filter ring (4) is provided between the detection rod (1) and the cone tip (2). An air supply pipe (5), a waterproof ring (6), a detection device, a one-way valve and a controller (7) are provided in the cavity. The waterproof ring (6) is provided at the upper end of the cavity. The air supply pipe (5) passes through the waterproof ring (6) and is connected to an air source at one end, and is connected to an exhaust pipe (8) and an air vent (9) at the other end. The exhaust pipe (8) is communicated with the air vent (9), and the air vent (9) is provided at the annular surface position of the pore pressure filter ring (4); The detection device comprises an electronic vacuum gauge (10), the electronic vacuum gauge (10) is electrically connected to a controller (7), the controller (7) is electrically connected to a one-way valve, and the one-way valve is arranged between the exhaust pipe (8) and the gas supply pipe (5); The cavity comprises a first cavity (11), a second cavity (12) and a third cavity (13); the first cavity (11) is a cylindrical structure; the second cavity (12) is a combined structure with a truncated cone at the upper end and a cylindrical shape at the lower end; and the third cavity (13) is a cylindrical structure; The gas delivery pipe (5) passes through the small-diameter end of the second cavity (12), and the small-diameter end of the second cavity (12) is closed; The first cavity (11), the second cavity (12), and the third cavity (13) are an integrated structure, and the first cavity (11), the second cavity (12), and the third cavity (13) are in communication; A one-way valve is provided at the connection position of the second cavity (12) and the third cavity (13), and the one-way valve comprises a limit plate (14), a baffle (15), a first bracket (16), a second bracket (17), a sealing ring (18), a spring (19), a travel switch (20) and an electromagnet (21), wherein the first bracket (16) is T-shaped, one side of the first bracket (16) is a curved surface fixed to the inner annular surface of the lower end of the second cavity (12), and the other side of the first bracket (16) is parallel to the truncated cone-shaped large diameter end of the second cavity (12), and the spring (19) is fixedly provided in the vertical direction; The other end of the spring (19) is fixedly connected to the baffle (15), the baffle (15) is a disc-shaped plate made of ferromagnetic material, the baffle (15) is arranged below the limit plate (14), the limit plate (14) is a circular ring structure, the limit plate (14) is arranged at the connection position of the second cavity (12) and the third cavity (13), and is fixed to the third cavity (13); A sealing ring (18) is provided at the contact position between the limit plate (14) and the baffle (15), an electromagnet (21) is provided at the lower part of the baffle (15), a second bracket (17) is provided at the lower part of the electromagnet (21), the second bracket (17) is T-shaped, one side of the second bracket (17) is a curved surface fixed to the inner annular surface of the third cavity (13), and the other side is fixed with the electromagnet (21) and is parallel to the baffle (15), and a travel switch (20) is fixed at the upper end of the electromagnet (21).

2. The pore pressure static penetration probe capable of reducing the pull-out force according to claim 1, characterized in that: The controller (7) includes an MCU chip and a drive module, the ADC input end of the MCU chip is connected to the output end of the electronic vacuum gauge (10), the IO end of the MCU chip is connected to the input end of the drive module, the drive module is electrically connected to the electromagnet (21), and the electromagnet (21) is connected to the drive module in series with the travel switch (20) and connected to the power supply to form a loop.

3. The pore pressure static penetration probe capable of reducing the pull-out force according to claim 1, characterized in that: The detection device further comprises a pore water pressure sensor (22) and a cone tip resistance sensor (23); the pore water pressure sensor (22), the cone tip resistance sensor (23) and the electronic vacuum gauge (10) are arranged in the third cavity (13); an exhaust pipe (8) is provided at the lower portion of the third cavity (13); and the third cavity (13) is communicated with the pore pressure filter ring (4) via the exhaust pipe (8).

4. The pore pressure static penetration probe capable of reducing the pull-out force according to claim 3, characterized in that: The detection device further comprises a side wall friction resistance sensor (24); an irregular notch is provided on the surface of the detection rod (1) at the connection portion with the side wall friction cylinder (3); the side wall friction cylinder (3) is provided with a protrusion corresponding to the notch; and the side wall friction resistance sensor (24) is provided at the junction position between the notch of the detection rod (1) and the protrusion of the side wall friction cylinder (3); The sidewall friction resistance sensor (24), the pore water pressure sensor (22), and the cone tip resistance sensor (23) are all pressure sensors, and the sidewall friction resistance sensor (24), the pore water pressure sensor (22), and the cone tip resistance sensor (23) are electrically connected to the controller (7).

5. The pore pressure static penetration probe capable of reducing the pull-out force according to claim 1, characterized in that: The detection device further comprises a gyroscope (25), wherein the gyroscope (25) is disposed in the first cavity (11), and the gyroscope (25) is electrically connected to the controller (7).

6. The pore pressure static penetration probe capable of reducing the pull-out force according to claim 1, characterized in that: The detection device further comprises a positioning module (26), wherein the positioning module (26) is arranged inside the cone tip (2), and the positioning module (26) is electrically connected to the controller (7).

7. The pore pressure static penetration probe capable of reducing the pull-out force according to claim 1, characterized in that: The controller (7) is electrically connected to a wireless transmission module (27), and the wireless transmission module (27) includes one or more combinations of a Bluetooth module, a 5G module, and a WiFi module; The wireless transmission module (27) is arranged in the first cavity (11).

8. The pore pressure static penetration probe capable of reducing the pull-out force according to claim 1, characterized in that: A waterproof and breathable membrane is provided on the outside of the vent hole (9).

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