Spiral plate load test probe for comprehensive test of soil pressure and pore water pressure

Abstract

The utility model discloses a spiral plate load test probe for comprehensive testing of soil pressure and pore water pressure, which comprises a torsion sleeve serving as an outer shell, the top of the torsion sleeve is coaxially and fixedly connected with an upper joint, a soil pressure detection unit is axially limited in the torsion sleeve, and the lower part of the torsion sleeve coaxially slides and is circumferentially limited and inserted with a lower joint; the lower portion of the lower connector coaxially slides and is sleeved with a spiral plate head in a limiting mode in the circumferential direction, and the bottom of the lower connector axially penetrates through the spiral plate head and is fixedly connected with a water pressure detection unit. The probe integrates soil pressure and water pressure testing functions, can effectively test the pressure borne by the spiral plate and the change of pore water pressure below the spiral plate, is compact, exquisite and stable in structure and convenient to transmit torsion and pressure, and the spiral plate head is easy to assemble and disassemble, so that the test requirement is met.

Description

Technical Field

[0001] This utility model relates to the field of geological exploration technology, and in particular to a spiral plate load test probe for comprehensive testing of earth pressure and pore water pressure. Background Technology

[0002] The spiral plate load test is a commonly used in-situ testing method for determining the bearing capacity and deformation modulus of deep foundation soil. It involves applying a load to a spiral bearing plate using sequentially connected probes as force transmission rods, observing and recording the settlement displacement of the foundation soil beneath the plate after compression, thus obtaining the load-settlement-time relationship curve for the foundation soil. This allows for the acquisition of design parameters such as bearing capacity and deformation modulus of foundation soil at different depths. For saturated soil, this method does not consider the influence of pore water pressure. In fact, the load applied at each stage of the load test is the sum of pore water pressure and effective stress. Consolidation of saturated soil is the process of pore water pressure dissipation and the corresponding increase in effective stress. Measuring the dissipation process of pore water pressure can also allow for the calculation of parameters such as the soil consolidation coefficient. The effective and accurate acquisition of the consolidation coefficient is of great significance for the correct prediction of foundation settlement.

[0003] The spiral plate load test involves connecting a spiral plate pressure sensor to a force transmission rod. The pressure sensor is connected to the spiral plate head via a square plug. The spiral plate head is screwed into the ground to the test depth manually or mechanically. After the test, the force transmission rod is pulled out, separating the spiral plate head from the pressure sensor, leaving the spiral plate head in the hole. Due to the square plug-in structure of the spiral plate head and pressure sensor, it is inconvenient to install a pore water pressure sensor on the shaft of the spiral plate head. Therefore, there is currently no soil pressure and pore water pressure probe for spiral plate load testing.

[0004] Patent document CN 218757385U discloses a spiral plate load test probe with built-in pore pressure monitoring. It has a groove on the main shaft at the upper and lower ends of the spiral bearing plate, and two miniature pore pressure gauges are installed in one groove. The transmission line is connected to a data acquisition instrument to transmit the pore pressure gauge voltage signal. A protective steel plate is installed on the outside of the miniature pore pressure gauge. The circular protective plate has multiple holes evenly distributed on it. The protective steel plate is embedded in the main shaft. The pore pressure change around the probe is tested by the two miniature pore pressure gauges.

[0005] The aforementioned patent theoretically allows for the measurement of pore water pressure changes around a spiral plate, but it fails to provide solutions for how to connect the spiral plate to the pressure sensor, how to seal it, and how to connect the pore water pressure transmission line to the data acquisition instrument. Furthermore, after the experiment, it is difficult to remove the spiral plate head from the ground, resulting in the waste of the pore water pressure sensor. Therefore, this patented solution is difficult to implement effectively in practical engineering and requires further improvement.

[0006] Based on the above situation, there is an urgent need to develop a spiral plate load test probe for comprehensive testing of earth pressure and pore water pressure. Utility Model Content

[0007] The purpose of this invention is to overcome the shortcomings of existing technologies and propose a spiral plate load test probe for integrated earth pressure and pore water pressure testing. First, the probe can transmit the torque of the force transmission rod, screwing the spiral plate head into the stratum at a predetermined test depth. Second, during the load test, the probe can accurately measure the pressure on the spiral plate and the changes in pore water pressure beneath it. Third, after the test, when the force transmission rod is lifted, the probe sensor can be ensured to detach from the spiral plate head, allowing the sensor to be easily removed from the ground for the next test. This probe integrates water pressure testing and earth pressure testing functions, effectively combining a pressure sensor and a water pressure sensor while ensuring the existing spiral plate head and sensor remain detached underground. It optimizes wiring and waterproof sealing, and has a simple, stable, and easily implemented structure.

[0008] A spiral plate load test probe for integrated earth pressure and pore water pressure testing includes a torsion sleeve as the outer shell. An upper connector is coaxially fixed to the top of the torsion sleeve. An earth pressure detection unit is axially limited and overlapped inside the torsion sleeve. A lower connector is coaxially slidable and circumferentially limited and inserted into the lower part of the torsion sleeve. A spiral plate head is coaxially slidable and circumferentially limited and fitted onto the lower part of the lower connector. The bottom of the lower connector axially penetrates the spiral plate head and is fixedly connected to a water pressure detection unit.

[0009] Preferably, the upper connector is threaded to the top of the torque sleeve, the top of which is fixed with an aviation plug, and the bottom of the upper connector extends axially into the interior of the torque sleeve to provide upward deformation space for the earth pressure detection unit.

[0010] Preferably, the upper connector, the earth pressure detection unit, and the lower connector are all provided with axially connected cable passage holes, in which water pressure cables and earth pressure cables are laid. The water pressure cables pass through the lower connector, the earth pressure detection unit, and the upper connector from bottom to top and are connected to the aviation plug. The earth pressure cables pass through the upper connector from bottom to top and are connected to the aviation plug.

[0011] Preferably, the earth pressure testing unit includes a connector, a blind tube, a tightening ring, and a resistance strain gauge. The upper part of the connector is axially inserted into and abuts against the inside of the blind tube, and a tightening ring is sleeved on the outside of the blind tube. The bottom of the tightening ring abuts against the boss at the bottom of the blind tube. The tightening ring is threadedly connected to the torsion sleeve to limit the blind tube. The resistance strain gauge is fixed on the outer wall of the blind tube.

[0012] Preferably, the connector slides axially and is limited inside the torque sleeve. The bottom thread of the connector is connected to the top end of the lower connector that extends axially into the torque sleeve, and the connector provides downward limit for the lower connector. The top of the connector has an integrally formed top post that axially supports the insertion into the blind tube.

[0013] A radially protruding retaining ring is integrally formed on the circumferential outer wall at the bottom of the blind tube, which supports the tight ring upwards;

[0014] The lower part of the inner wall of the torque sleeve has a radially convex ring platform integrally formed, and a spline groove integrally formed on the ring platform. The bottom end face of the connector is axially overlapped on the ring platform, and the connector is provided with downward limit.

[0015] Preferably, the upper spline of the lower connector mates with the inner spline groove of the torque sleeve, and the lower spline of the lower connector is connected to the spiral plate head; the spiral plate head includes an inner spline sleeve of the spiral plate and spiral plate blades, wherein the spiral plate blades are fixedly connected to the circumferential outer wall of the inner spline sleeve of the spiral plate, and the inner spline sleeve of the inner spline sleeve of the spiral plate is fitted onto the circumferential outer wall of the lower part of the lower connector.

[0016] Preferably, the water pressure detection unit includes a cone and a water pressure sensor, wherein the water pressure sensor is fixedly embedded in the bottom end of the lower connector, and the cone is coaxially fixed to the bottom end of the lower connector; a water passage is opened inside the cone, the inlet of the water passage is radially arranged on the circumferential outer wall of the cone, and the outlet of the water passage is axially arranged on the top end face of the cone and connected to the water pressure sensor; a filter ring is embedded on the circumferential outer wall of the cone to block the water inlet of the water passage.

[0017] Preferably, a radially concave annular platform is formed on the circumferential outer wall at the upper part of the cone head. The annular platform has multiple radial water inlet holes connected to water channels, and a filter ring is coaxially fitted inside the annular platform. The outer diameter of the filter ring is equal to the outer diameter of the cone head.

[0018] Preferably, the test probe is provided with multiple sealing rings, which are respectively located at: the threaded connection between the upper connector and the torque sleeve, the spline connection between the torque sleeve and the lower connector, and the connection between the pore water pressure sensor and the lower connector; the lower part of the lower connector is provided with multiple damping rings, which are radially elastically supported and axially damped by the spiral plate head.

[0019] The advantages and technical effects of this utility model are as follows:

[0020] This invention relates to a spiral plate load test probe for integrated earth pressure and pore water pressure testing. While ensuring that the spiral plate head is detached from the underground sensor, it simultaneously possesses the functions of water pressure testing and earth pressure testing. Furthermore, it optimizes the wiring and waterproof sealing of the resistance strain gauge and water pressure sensor, solving the problem in the prior art where the spiral plate head structure limits the wiring, installation, and effective detachment of the water pressure sensor and earth pressure sensor.

[0021] This utility model discloses a spiral plate load test probe for comprehensive earth pressure and pore water pressure testing. Through the upper connector, the torsion sleeve is threadedly fixed to the upper probe rod. The electrical signal connection between the resistance strain gauge and the water pressure sensor is achieved through the aviation plug fixed on the upper connector. Finally, the wiring of the resistance strain gauge and the water pressure sensor is achieved through multiple wire holes.

[0022] This utility model discloses a spiral plate load test probe for comprehensive earth pressure and pore water pressure testing. In the earth pressure detection unit, a connector serves as a connecting component to fix the lower joint and transmits the load reaction force transmitted upward from the lower joint to the blind tube. A resistance strain gauge is attached to the outside of the blind tube, and a tight ring cooperates with a torque sleeve to constrain and position the blind tube with an upward limiting space. The bottom of the connector cooperates with the ring platform inside the torque sleeve to lower the connector and the lower joint.

[0023] This utility model discloses a spiral plate load test probe for comprehensive testing of earth pressure and pore water pressure. The upper and lower parts of the lower connector are provided with spline grooves, which can realize circumferential power transmission with the torsion sleeve and the spiral plate head and can be axially slidably connected. On the one hand, it ensures that the downward pressure and rotational digging force of the torsion sleeve are transmitted to the spiral plate head through the lower connector. On the other hand, it also facilitates the lifting of the torsion sleeve to realize the underground separation of the lower connector and the spiral plate head.

[0024] This utility model discloses a spiral plate load test probe for comprehensive testing of earth pressure and pore water pressure. In the water pressure detection unit, water pressure is transmitted to the water pressure sensor through the water passage on the cone head, and the filter ring filters the slag to prevent the water passage from being blocked. Attached Figure Description

[0025] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0026] Figure 2 This is a three-dimensional structural diagram of the present invention (the torque sleeve and spiral plate head are not shown).

[0027] Figure 3 This is a half-sectional view of the present invention;

[0028] Figure 4 for Figure 3 A magnified view of a section at point A in the middle;

[0029] Figure 5 for Figure 3 A magnified view of a section at point B in the middle;

[0030] Figure 6 This is a flowchart illustrating the force transmission process of this utility model (the force transmission method of the probe during the rotation and downward pressing process);

[0031] Figure 7This is a flowchart illustrating the force transmission process of this utility model (the force distribution method of the earth pressure testing unit during load testing);

[0032] In the diagram: 1-Aviation plug; 2-Upper connector; 3-Torque sleeve; 4-Lower connector; 5-Spiral plate head; 6-Tightening ring; 7-Connector; 8-Cone; 9-Filter ring; 10-Spline; 11-Wire hole; 12-Earth pressure cable; 13-Blind tube; 14-Resistance strain gauge; 15-Retaining ring; 16-Water passage; 17-Water pressure cable; 18-Inner spline sleeve of spiral plate; 19-Water pressure sensor; 20-Spiral plate blade; 21-Ring platform; 22-Top column; 23-Sealing ring; 24-Damping ring; 25-Concave ring platform. Detailed Implementation

[0033] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0034] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0035] Please see Figures 1 to 5 The present invention discloses a spiral plate load test probe for integrated earth pressure and pore water pressure testing, comprising a torsion sleeve 3 as the outer shell, an upper connector 2 coaxially fixed to the top of the torsion sleeve, an earth pressure detection unit axially limited and overlapped inside the torsion sleeve, a lower connector 4 coaxially sliding and circumferentially limited and inserted into the lower part of the torsion sleeve; a spiral plate head 5 coaxially sliding and circumferentially limited and fitted on the lower part of the lower connector, and a water pressure detection unit axially penetrating the spiral plate head at the bottom of the lower connector.

[0036] Preferably, the upper connector is threaded to the top of the torque sleeve, and the top of the upper connector is fixed with an aviation plug 1. The bottom of the upper connector extends axially into the inside of the torque sleeve, and its interior and the interior of the torque sleeve together form the earth pressure detection unit cavity.

[0037] Preferably, the earth pressure testing unit includes a connector 7, a blind tube 13, a tightening ring 6, and a resistance strain gauge 14. A radially protruding retaining ring 15 is integrally formed on the circumferential outer wall at the bottom end of the blind tube. The tightening ring 6 is sleeved on the outside of the blind tube and is threadedly connected to the torsion sleeve 3. The bottom of the tightening ring abuts against the upper surface of the retaining ring 15 to provide upward deformation space for the blind tube. The resistance strain gauge 14 is fixed on the outer surface of the blind tube 13 and is used to test the voltage change of the Huygens bridge formed by the resistance strain gauge due to the deformation of the blind tube under force, and then calculate the force.

[0038] Preferably, the upper part of the connector 7 has a top post 22 that is axially supported and inserted into the blind tube 13, and the bottom of the connector 7 is threadedly connected to the top of the lower connector 4 that extends axially into the torsion sleeve, forming a load transmission rod.

[0039] Preferably, a radially convex annular platform 21 is integrally formed on the lower inner wall of the torque sleeve 3. A spline groove is formed on the annular platform. The upper end face of the annular platform axially overlaps the bottom end face of the connector and provides a downward limit for the connector, as well as a downward limit for the lower connector. The upper spline of the lower connector mates with the spline groove inside the torque sleeve to transmit the torque of the upper force transmission rod to the lower connector through the upper connector and the torque sleeve.

[0040] Preferably, the lower connector has an annular boss in the middle for easy installation. The upper edge of the boss has a certain gap (1-2mm) with the bottom end face of the torque sleeve, which is used to transfer all the force on the spiral bearing plate to the earth pressure detection unit through the lower connector. The outer diameter of the annular boss is the same as the outer diameter of the torque sleeve.

[0041] Preferably, the lower spline 10 of the lower connector mates with the inner spline sleeve 18 of the spiral plate head, and the inner spline sleeve of the spiral plate is fitted onto the outer spline wall of the lower part of the lower connector. The spiral plate head includes the inner spline sleeve 18 and the spiral plate blade 20, wherein the spiral plate blade is fixedly connected to the circumferential outer wall of the inner spline sleeve, and the upper end face of the inner spline sleeve abuts against the lower end face of the annular boss in the middle of the lower connector, for transmitting the force received by the spiral plate head to the lower connector 4.

[0042] Preferably, the water pressure detection unit includes a cone head 8 and a water pressure sensor 19, wherein the water pressure sensor is fixedly embedded in the bottom end of the lower connector, and the cone head 8 is coaxially fixed to the bottom end of the lower connector; a radially concave annular platform 25 is formed on the circumferential outer wall of the upper part of the cone head, and a water passage 16 is arranged in the middle of the annular platform. The water inlet of the water passage is radially arranged on the circumferential outer wall of the cone head, and the water outlet of the water passage is axially arranged on the top end face of the cone head and connected to the water pressure sensor 19; and a porous pore pressure filter ring 9 is coaxially fitted on the annular platform 25; the outer diameter of the pore pressure filter ring is equal to the outer diameter of the cone head.

[0043] Preferably, the upper connector, the earth pressure detection unit, and the lower connector are all provided with axially connected cable passage holes 11, in which pore water pressure cables 17 and earth pressure cables 12 are laid. The pore water pressure cables pass through the lower connector, the earth pressure detection unit, and the upper connector from bottom to top and are connected to the aviation plug 1. The earth pressure cables pass through the upper connector from bottom to top and are connected to the aviation plug.

[0044] Preferably, the test probe is provided with multiple sealing rings 23, which are respectively located at: the threaded connection between the upper connector and the torque sleeve, the bottom connection between the bottom of the torque sleeve and the bottom of the upper spline of the lower connector, and inside the water pressure sensor 19 and the bottom end of the lower connector, to prevent water from entering the test probe and to ensure the normal operation of the internal pressure and pore pressure sensors of the test probe; multiple damping rings 24 are provided at both ends of the lower spline of the lower connector. The outer periphery of the damping ring elastically supports and axially dampens the inner spline sleeve of the spiral plate, to prevent the spiral plate head from detaching from the spiral plate test probe during installation before the spiral plate load test, and at the same time, after the test, the spiral plate head is easy to detach from the sensor when the probe is lifted.

[0045] In addition, the preferred embodiment of this utility model is that the aviation plug, resistance strain gauge, pore water pressure sensor, pore water pressure cable and earth pressure cable are all mature products in the prior art, and their electrical connection methods all adopt mature technical means in the prior art.

[0046] In addition, the spiral plate load test probe for comprehensive earth pressure and pore water pressure testing of this utility model transmits force in the rotational downward pressing process as follows: Figure 6 As shown.

[0047] This utility model discloses a spiral plate load test probe for comprehensive earth pressure and pore water pressure testing. During the load test, the earth pressure detection unit is subjected to force as follows: Figure 7 As shown.

[0048] Thus, the magnitude of the force can be sensed by observing the change in resistance of the strain gauge attached to the blind tube due to the deformation caused by the force.

[0049] To more clearly describe the specific embodiments of this utility model, an example is provided below:

[0050] The implementation steps of this utility model are as follows:

[0051] 1. During the test, the cable needs to be connected to the aviation plug of the test probe, and the cable should be passed through the probe rod coaxially connected to the upper end of the upper connector. At the same time, the probe rod should be manually or mechanically used to rotate and press the probe down to the predetermined test depth of the formation.

[0052] 2. Install reaction force and pressurization devices and settlement monitoring devices;

[0053] 3. Connect the test pressure and pore water pressure cables to the test control instrument, and at the same time connect the sedimentation meter to the test control instrument via cable or wirelessly, and check whether the test data is normal;

[0054] 4. Load the spiral bearing plate with a probe according to the expected loading level and loading standard, and maintain the loading amount at each level. At the same time, record the sinking displacement and pore water pressure value of the spiral bearing plate under the load according to the measurement and recording time standard.

[0055] 5. Apply the next level of load in a timely manner according to the settlement stability standard or observation time standard, and continue to measure and record the settlement displacement and pore water pressure values ​​according to the standard.

[0056] 6. Once all levels of load tests are completed and soil failure is reached, the load test at that depth can be terminated.

[0057] 7. If you want to continue the load test at the next depth of the hole, disconnect the cable connecting the test control instrument, add the probe rod again, and repeat steps 1-6 above;

[0058] 8. To conclude the spiral plate load test for this borehole, disconnect the cable connecting the main control instrument, as well as the reaction force, pressurization, and settlement observation devices. Then, sequentially lift and disassemble the probe rod until the probe is removed. Initially, when lifting the probe rod, the spiral plate head (inner spline sleeve + spiral plate blades) will detach from the probe and remain in the formation at the test depth.

[0059] 9. Remove the cone of the test probe, clean the water passage and pore pressure filter ring, and reinstall it. If the damping ring is damaged, replace it in time. Then, put a new spiral plate head (spiral plate inner spline sleeve + spiral plate blade) on the lower connector, and lubricate the entire probe for maintenance, ready for the next test.

[0060] Finally, any aspects of this utility model not fully described herein utilize existing mature products and technologies.

[0061] In the description of this specification, references to the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example that are included in the embodiments or examples of this utility model.

[0062] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A spiral plate load test probe for integrated earth pressure and pore water pressure testing, characterized in that: The device includes a torsion sleeve as its outer shell, with an upper connector coaxially fixed to its top. An earth pressure testing unit is axially limited and overlapped inside the torsion sleeve. A lower connector is coaxially slidably inserted into the lower part of the torsion sleeve. A spiral plate head that rotates synchronously with the lower connector is coaxially slidably fitted onto the lower part of the lower connector, and a water pressure testing unit is axially fixed to the bottom of the lower connector through the spiral plate head.

2. The spiral plate load test probe for comprehensive earth pressure and pore water pressure testing according to claim 1, characterized in that: The upper connector is threaded to the top of the torque sleeve. An aviation plug is fixed to the top of the upper connector, and the bottom of the upper connector extends axially into the interior of the torque sleeve to provide upward deformation space for the earth pressure detection unit.

3. The spiral plate load test probe for comprehensive earth pressure and pore water pressure testing according to claim 2, characterized in that: The upper connector, earth pressure detection unit, and lower connector are all provided with axially connected cable passage holes, in which water pressure cables and earth pressure cables are laid. The water pressure cables pass through the lower connector, earth pressure detection unit, and upper connector from bottom to top and are connected to the aviation plug. The earth pressure cables pass through the upper connector from bottom to top and are connected to the aviation plug.

4. The spiral plate load test probe for comprehensive earth pressure and pore water pressure testing according to claim 1, characterized in that: The earth pressure testing unit includes a connector, a blind tube, a tightening ring, and a resistance strain gauge. The upper part of the connector is axially inserted into and abuts against the inside of the blind tube, and a tightening ring is sleeved on the outside of the blind tube. The bottom of the tightening ring abuts against the boss at the bottom of the blind tube. The tightening ring is threadedly connected to a torque sleeve to limit the blind tube. The resistance strain gauge is fixed on the outer wall of the blind tube.

5. The spiral plate load test probe for comprehensive earth pressure and pore water pressure testing according to claim 4, characterized in that: The connector slides axially and is limited inside the torque sleeve. The bottom thread of the connector is connected to the top end of the lower connector that extends axially into the torque sleeve. The connector provides downward limit for the lower connector. The top of the connector has an integrally formed top post that axially supports the insertion into the blind tube. A radially protruding retaining ring is integrally formed on the circumferential outer wall at the bottom end of the blind tube, and the retaining ring abuts against the tight ring upward. The inner wall of the torque sleeve has a radially convex annular platform formed thereon, which axially overlaps the bottom end face of the connector and provides downward limit for the connector.

6. The spiral plate load test probe for comprehensive earth pressure and pore water pressure testing according to claim 1, characterized in that: The upper spline of the lower connector is connected to the torque sleeve, and the lower spline of the lower connector is connected to the spiral plate head; the spiral plate head includes an inner spline sleeve of the spiral plate and spiral plate blades, wherein the spiral plate blades are fixed on the circumferential outer wall of the inner spline sleeve of the spiral plate, and the inner circumferential spline sleeve of the inner spline sleeve of the spiral plate is fitted on the circumferential outer wall of the lower part of the lower connector.

7. The spiral plate load test probe for integrated earth pressure and pore water pressure testing according to claim 1, characterized in that: The water pressure detection unit includes a cone and a water pressure sensor. The water pressure sensor is fixedly embedded in the bottom end of the lower connector, and the cone is coaxially fixed to the bottom end of the lower connector. A water passage is opened inside the cone. The inlet of the water passage is radially arranged on the outer circumferential wall of the cone, and the outlet of the water passage is axially arranged on the top end face of the cone and connected to the water pressure sensor. A filter ring that blocks the water inlet of the water passage is fitted on the outer circumferential wall of the cone.

8. The spiral plate load test probe for integrated earth pressure and pore water pressure testing according to claim 7, characterized in that: A radially concave annular platform is formed on the circumferential outer wall at the upper part of the cone head. Multiple radial water inlet holes connected to water channels are opened inside the annular platform, and a filter ring is coaxially fitted inside the annular platform; the outer diameter of the filter ring is equal to the outer diameter of the cone head.

9. The spiral plate load test probe for comprehensive earth pressure and pore water pressure testing according to claim 1, characterized in that: The test probe is equipped with multiple sealing rings, which are respectively located at: the threaded connection between the upper connector and the torque sleeve, the spline connection between the torque sleeve and the lower connector, and the connection between the pore water pressure sensor and the lower connector; the lower part of the lower connector is equipped with multiple damping rings, which are radially elastically supported and axially damped by the spiral plate head.

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