Static cone penetration calibration tank device and use method thereof

Abstract

The invention relates to a static sounding calibration tank device and a using method thereof. The static sounding calibration tank device comprises a support, a probe, a movable cylinder, a connecting cylinder, a calibration tank, a high-pressure plunger pump, a vertical telescopic mechanism and a driving assembly, and the probe is provided with a sensor; at least two top penetration holes and at least two bottom penetration holes are formed in the top surface and the bottom surface of the movable cylinder; the movable cylinder, the connecting cylinder and the calibration tank are coaxially connected in sequence from top to bottom, and the calibration tank is used for containing test samples; the high-pressure plunger pump is communicated with the interiors of the movable cylinder and the connecting cylinder through pipelines; the vertical telescopic mechanism is horizontally and movably mounted on the bracket, is connected with the probe and is used for driving the probe to move vertically and horizontally; the driving assembly is connected with the movable barrel and the support and used for driving the movable barrel and the support to synchronously rotate around the axis of the movable barrel. The device is simple in structure and convenient to operate, can fully check the soil body through multiple times of penetration at different points, fully simulates the in-situ stress state of an underground soil layer, and provides indoor test evidence for analysis of static sounding in-situ test results.

Description

Technical Field

[0001] The present invention belongs to the technical field of static cone penetration testing equipment, and particularly relates to a static cone penetration calibration tank device and a using method thereof. Background Art

[0002] Static cone penetration is an in-situ testing method for measuring the variation characteristics of soil quality. The testing principle is to collect various stress data during the process of a conical probe equipped with sensors being penetrated into the soil at a quasi-static force and uniform speed, and to judge the properties of the soil by interpreting the data, such as sediment type, physical and mechanical properties of the soil, acoustic properties, etc.; it has the characteristics of reflecting the macroscopic properties of the soil in real time, continuously and truly, and by replacing or developing different probes, various detection objectives can be achieved or the purpose of long-term observation can be achieved.

[0003] As a future clean energy, natural gas hydrate, but the sediments containing natural gas hydrate may cause explosive decomposition due to certain incentives, or the properties of the sediment soil may change due to free natural gas, such as the compressibility, shear strength and permeability of the sediment, etc., thus leading to engineering geological disasters. Static cone penetration with different probes installed can detect different physical properties of the sediment and evaluate the risk of engineering geological disasters and environmental disasters; but through the interpretation of the test data, it can also be applied to the exploration of hydrates. According to different data, it can reflect sediment type, temperature gradient, acoustic characteristics, the presence of natural gas, occurrence state, influencing factors affecting seismic data discrimination, chemical anomalies, etc. These characteristics just address the problem of insufficient accuracy of the current conventional methods for hydrate exploration and identification. Static cone penetration has a very broad application prospect in the field of hydrate exploration. Static cone penetration is the main means to obtain on-site engineering geological parameters. The static cone penetration testing technology is widely used in the geological survey of hydrates in the South China Sea, and the mechanical properties of deep-sea hydrate sediments can be inverted through this technology.

[0004] The working principle of the static cone penetration calibration tank device is based on the basic principle of static cone penetration technology, that is, by simulating the penetration process of the static cone penetration probe, the mechanical parameters of the soil layer are measured. During the experiment, first, the sample is loaded into the calibration tank body, and confining pressure is provided to the sample through the confining pressure system. Then, the static cone penetration device is started, and the probe penetrates into the sample at a certain speed. During the penetration process, the data acquisition system real-time collects various data and records and analyzes them. Finally, based on the collected data, the mechanical properties of the soil layer can be evaluated, providing an important basis for geotechnical engineering investigation and design. The static cone penetration calibration tank device has been widely used in various geotechnical engineering investigations and tests. For example, in the exploration of deep-sea sediments, this device can be used to simulate the characteristics of sediments in the deep-sea environment and conduct static cone penetration experiments to evaluate the mechanical properties of the sediments. In addition, during the construction of underground projects such as underground tunnels and subway projects, this device can also be used to conduct in-situ simulation tests on the soil layer, providing an important basis for engineering design and construction.

[0005] The existing static cone penetration calibration tank devices generally can only achieve penetration detection at one point, and the penetration at the same position may not accurately reflect the soil properties in this area. In some types of seabed static cone penetration tests, it takes a lot of time to build a stable platform; and it also takes a lot of time to transfer from one measurement point to another, resulting in low work efficiency. If penetration is required at other positions, the entire device needs to be moved; it is very inconvenient to lift and move the device in the deep sea, which not only requires a large amount of manpower to re-monitor the seabed scene, but also may cause deviations between the expected position and the actual position during multiple movements, greatly increasing the labor cost and economic cost.

[0006] However, static cone penetration has a strong regional dependence, that is, the engineering static cone penetration parameters obtained in a certain area cannot be directly applied to other areas due to the influence of factors such as soil quality, pore permeability, and soil components; therefore, it is necessary to carry out static cone penetration calibration tank experiments for soil verification. Summary of the Invention

[0007] Aiming at at least one of the above problems in the prior art, the purpose of the present invention is to provide a static cone penetration calibration tank device and its use method, so that through multiple penetrations at different points, the soil can be fully verified; compared with the traditional static cone penetration calibration tank, it can fully simulate the in-situ stress state of the underground soil layer and provide indoor test evidence for the analysis of the results of static cone penetration in-situ tests.

[0008] To achieve the above purpose, the present invention adopts the following technical solutions: A static cone penetration calibration tank device, comprising: A bracket and a probe, the probe is equipped with a sensor; A movable cylinder, with a top surface and a bottom surface respectively provided at its top and bottom ends; a top penetration hole and a bottom penetration hole are respectively opened on the top surface and the bottom surface of the movable cylinder, the top penetration hole and the bottom penetration hole are respectively provided with at least two, and the numbers are equal; the top penetration hole and the bottom penetration hole are vertically distributed in a one-to-one correspondence, and an upper opening and closing member and a lower opening and closing member are respectively movably arranged thereon; the movable cylinder is connected to the bracket; A connecting cylinder, with an open top end and a baffle member movably arranged at its bottom end; the connecting cylinder is coaxially connected to the bottom of the movable cylinder; A calibration tank, with an open top end and a bottom surface provided at its bottom end; the calibration tank is coaxially connected to the bottom of the connecting cylinder, and the calibration tank is used to contain test samples; A high-pressure piston pump, which is connected to the interiors of the movable cylinder and the connecting cylinder through pipelines; A vertical telescopic mechanism, horizontally movably installed on the bracket and connected to the probe, for driving the probe to perform vertical and horizontal movements; A driving assembly, which is connected to the movable cylinder and the bracket, for driving the movable cylinder and the bracket to rotate synchronously around the axis of the movable cylinder body.

[0009] Preferably, at least two calibration tanks are provided and are arranged on a tray in a circumferential distribution; the tray is coaxially connected to a rotating member, the circumference where the multiple calibration tanks are distributed is coaxial with the rotating member, and the rotating member is used to drive the tray and the multiple calibration tanks to rotate.

[0010] Preferably, the multiple top penetration holes and the multiple bottom penetration holes are respectively distributed along the radial direction of the movable cylinder, the horizontal movement direction of the vertical telescopic mechanism is set as the radial direction of the movable cylinder, and the horizontal movement direction of the top penetration hole, the bottom penetration hole and the vertical telescopic mechanism is located in the same vertical plane.

[0011] Preferably, the vertical telescopic mechanism is provided with a vertical telescopic rod and a moving member.

[0012] Preferably, the vertical telescopic rod is connected to the bottom end of the moving member, the top end of the moving member is horizontally movably connected to the bracket, the probe is connected to the vertical telescopic rod, and the moving member is used to drive the vertical telescopic rod and the probe to move horizontally on the bracket.

[0013] Preferably, the driving assembly includes a motor and a gear, the rotating output shaft of the motor is connected to the axle of the gear; a ring gear is arranged on the outer wall of the movable cylinder and meshes with the gear.

[0014] Preferably, the vertical telescopic mechanism is connected to at least two of the probes, and the distance between adjacent probes is equal to the distance between adjacent top penetration holes.

[0015] Preferably, flexible sealing rings are provided on the inner walls of the top penetration hole and the bottom penetration hole.

[0016] The method for using the static cone penetration calibration tank device according to any one of the above includes the following steps: Step S1: Close the enclosure member, place the test sample in one of the calibration tanks, and seal the connection between the calibration tank and the connecting cylinder. Step S2: Open the pipeline for controlling the pressure in the connecting cylinder, start the high-pressure plunger pump, and after controlling the pressure in the connecting cylinder to be consistent with the pressure in the calibration tank, open the enclosure member; perform Steps S3 to S8 on one of the top penetration holes and the bottom penetration hole below it. Step S3: Open the top penetration hole by opening the upper opening and closing member, pass the probe through the top penetration hole and extend it into the movable cylinder; open the pipeline for controlling the movable cylinder, start the high-pressure plunger pump, and after controlling the pressure in the movable cylinder to be consistent with the pressure in the calibration tank, open the bottom penetration hole below the top penetration hole by opening the lower opening and closing member. Step S4: Horizontally move the vertical telescopic mechanism on the bracket to drive the probe to move above the top penetration hole. Step S5: Drive the probe to move downward through the top penetration hole by the telescopic movement of the vertical telescopic mechanism in the vertical direction. Step S6: Make the probe move downward through the bottom penetration hole and penetrate into the test sample in the calibration tank, and at the same time collect the measurement data of the sensor. Step S7: Drive the probe to move upward above the bottom penetration hole by the contraction movement of the vertical telescopic mechanism in the vertical direction, and then close the lower opening and closing member of the bottom penetration hole. Step S8: Drive the movable cylinder and the probe to rotate a preset angle around the axis of the movable cylinder by the driving component, and then perform Steps S6 and S7. Step S9: After releasing the pressure in the movable cylinder, drive the probe to move upward above the top penetration hole by the contraction movement of the vertical telescopic mechanism in the vertical direction, and perform Step S4 to make the probe reach above another top penetration hole, and then perform Steps S3 to S8 on this another top penetration hole and the bottom penetration hole below it.

[0017] Preferably, the following steps are further included: Step S10: Close the enclosure member and remove the connection between the connecting cylinder and the calibration tank. Step S11: Rotate the rotating member to drive the tray to rotate, so that another calibration tank reaches below the movable cylinder and the connecting cylinder, and perform Steps S1 to S9 on the other calibration tank.

[0018] Due to the above technical solutions adopted by the present invention, it has the following advantages: The static cone penetration calibration tank device and its usage method provided by the present invention can fully calibrate the soil through multiple penetrations at different points. Compared with the traditional static cone penetration calibration tank, it can fully simulate the in-situ stress state of the underground soil layer and provide indoor test evidence for the analysis of the results of the static cone penetration in-situ test. Description of the Drawings

[0019] Figure 1 is a schematic structural diagram of a static cone penetration calibration tank device provided by an embodiment of the present invention.

[0020] Figure 2 is a schematic structural diagram of a tray of a static cone penetration calibration tank device provided by an embodiment of the present invention.

[0021] Figure 3 is a schematic diagram of a partial connection structure of an enclosure member provided by an embodiment of the present invention.

[0022] Figure 4 is a flowchart of a usage method of a static cone penetration calibration tank device provided by an embodiment of the present invention.

[0023] Figure 5 is a flowchart of a usage method of a static cone penetration calibration tank device provided by another embodiment of the present invention.

[0024] Reference Signs in the Drawings: 1. Bracket, 2. Probe, 3. Movable Cylinder, 4. Connecting Cylinder, 5. Calibration Tank, 6. Top Penetration Hole, 7. Bottom Penetration Hole, 8. High-Pressure Plunger Pump, 9. Pipeline, 10. Tray, 11. Enclosure Member, 12. Movable Cylinder Motor System. Detailed Embodiments

[0025] To make the objectives, technical solutions, and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0026] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by terms such as "upper", "lower", "front", "rear", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the system or component referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention. The arrow direction in the figure represents the liquid flow direction.

[0027] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "assembly", "installation", "connection" 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0028] The present invention provides a static cone penetration calibration tank device and its usage method. By setting a probe that can be telescoped, horizontally moved and rotated, the probe can pass through the penetration hole of the movable cylinder and penetrate into the test sample in the calibration tank; by penetrating multiple times at different positions of the test sample, the soil body can be fully calibrated; compared with the traditional static cone penetration calibration tank, it can fully simulate the in-situ stress state of the underground soil layer and provide indoor test evidence for the analysis of the results of in-situ static cone penetration tests.

[0029] Next, the embodiments of the present invention will be described in detail with reference to the drawings.

[0030] Embodiment 1 Please refer to Figures 1 to 3, the static cone penetration calibration tank device provided in this embodiment includes a bracket 1, a probe 2, a movable cylinder 3, a connecting cylinder 4, a calibration tank 5, a high-pressure plunger pump 8, a vertical telescopic mechanism, and a driving assembly. The probe 2 is equipped with sensors; the top and bottom of the movable cylinder 3 are respectively provided with a top surface and a bottom surface; the top surface and the bottom surface of the movable cylinder 3 are respectively provided with a top penetration hole 6 and a bottom penetration hole 7. The top penetration hole 6 and the bottom penetration hole 7 are each provided with at least two, and the numbers are equal; the top penetration hole 6 and the bottom penetration hole 7 are distributed vertically in a one-to-one correspondence, and the top penetration hole 6 and the bottom penetration hole 7 are respectively provided with an upper opening and closing member and a lower opening and closing member, and the movable cylinder 3 is connected to the bracket 1; the top of the connecting cylinder 4 is open, and a retaining member 11 is movably provided at the bottom; the connecting cylinder 4 is coaxially connected to the bottom of the movable cylinder 3; the top of the calibration tank 5 is open, and the bottom is provided with a bottom surface; the calibration tank 5 is coaxially connected to the bottom of the connecting cylinder 4, and the calibration tank 5 is used to hold test samples; the high-pressure plunger pump 8 is connected to the inside of the movable cylinder 3 and the connecting cylinder 4 through a pipeline 9; the vertical telescopic mechanism is horizontally movably installed on the bracket 1 and is connected to the probe 2 for driving the probe 2 to move vertically and horizontally; the driving assembly is connected to the movable cylinder 3 and the bracket 1 for driving the movable cylinder 3 and the bracket 1 to rotate synchronously around the axis of the movable cylinder body 3.

[0031] Among them, the vertical telescopic mechanism can be fixedly connected to the probe 2. The connecting cylinder 4 is coaxially connected to the bottom of the movable cylinder 3, that is, the top of the connecting cylinder 4 is coaxially and detachably connected to the bottom of the movable cylinder 3. The calibration tank 5 is coaxially connected to the bottom of the connecting cylinder 4, that is, the top of the calibration tank 5 is coaxially and detachably connected to the top of the connecting cylinder 4. The sensors can be set as pressure sensors and can be set as at least two. The test samples can be sediment soil bodies or deep-sea sediments.

[0032] Traditional static cone penetration probes are generally fixed in one position and cannot move, and the collection of deep-sea sediment soil body parameters is completed after one penetration; however, for hard soil layers such as gravelly soil and relatively dense sandy soil layers at this location, due to their large penetration resistance, it is often difficult to effectively penetrate; a single penetration of the same part of the soil body may also lead to inaccurate judgment of the soil layer properties in some cases. The static cone penetration calibration tank device provided in this embodiment uses the calibration tank 5 as the main body to hold test samples, and realizes the pressure-holding on-line detection of sediments at multiple rotating positions of the test samples by setting the movable cylinder 3 and the vertical telescopic mechanism, improves the accuracy of sediment soil body detection, fully simulates the in-situ stress state of the underground soil layer, and provides indoor test evidence for the interpretation of the results of in-situ static cone penetration tests.

[0033] For example, the calibration tank 5 can be used to fill deep-sea sediment samples and maintain the pressure stability of the test samples at a specific pressure through a pressure maintaining device. The pressure maintaining device includes a high-pressure plunger pump 8 and a pipeline 9 connected to the calibration tank 5. The high-pressure plunger pump 8 is connected to a pressure sensor and a control system. The control system is used to control the opening and closing of the high-pressure plunger pump 8, and the pressure sensor is used to measure the pressure in the pipeline 9, that is, the pressure value received by the test sample.

[0034] In addition, as a static cone penetration probe, the probe 2 can be provided with independent sensors and data transmission units for measuring the penetration resistance and other physical and mechanical properties of the sediment, and for real-time transmission and storage. A PLC or an embedded control system can be used to control the rotation of the movable cylinder 3 and the probe 2 and the insertion or upward movement of the probe 2 into the test sample. The probe 2 can be switched between the hole positions of multiple top penetration holes 6 and bottom penetration holes 7 by lifting, moving, and lowering to obtain soil parameters of multiple parts of the sediment during penetration.

[0035] When the probe 2 is inserted into the top penetration hole 6 and the bottom penetration hole 7, there is good sealing between the holes and the probe 2 to ensure the completion of the experiment while storing the pressure-maintained sample. The number of hole positions of the top penetration hole 6 and the bottom penetration hole 7 can be designed according to actual needs, such as three, six, or nine hole positions.

[0036] The enclosure member 11 can be set as an enclosure piece with a manual rotary switch. For example, one side edge position of the enclosure member 11 is rotationally connected to the column on the side wall of the fixed connection cylinder 4 and the calibration tank 5 through a ring buckle. By pulling the outer end of the ring buckle, the enclosure member 11 can be rotated around the column to open or close the connection cylinder 4. When the manual rotary enclosure member 11 is located at the bottom of the connection cylinder 4, the bottom end of the connection cylinder 4 is closed; when the manual rotary enclosure member 11 is moved away from the bottom of the connection cylinder 4, the bottom end of the connection cylinder 4 is opened. The upper opening and closing member can be set as a rotary cover that closes and opens the top penetration hole 6 by rotation. For example, one side edge position of the upper opening and closing member is connected to the top end of the side wall of the top penetration hole 6 through a second rotating shaft, and the upper opening and closing member can be rotated around the second rotating shaft by rotation. When the upper opening and closing member is located at the top of the top penetration hole 6, the top penetration hole 6 is closed; when the upper opening and closing member is moved away from the top of the top penetration hole 6, the top penetration hole 6 is opened. Similarly, the lower opening and closing member has the same structure as the upper opening and closing member.

[0037] The upper opening and closing member and the lower opening and closing member can be manually opened and closed.

[0038] Specifically, at least two calibration tanks 5 are provided and arranged on the tray 10 in a circumferential distribution; the tray 10 is coaxially connected to the rotating member, and the circumference where the multiple calibration tanks 5 are distributed is coaxial with the rotating member, and the rotating member is used to drive the tray 10 and the multiple calibration tanks 5 to rotate; thus, the calibration tank 5 corresponding to the connecting cylinder 4 can be switched, and the penetration of the probe 2 into different soil masses can be realized.

[0039] Among them, the rotating member can drive the tray 10 and the multiple calibration tanks 5 to rotate intermittently.

[0040] In addition, the rotating member can adopt a ratchet mechanism composed of a ratchet and a pawl in the prior art. The ratchet is coaxially connected to the tray 10, and the pawl can be driven by a motor, and the ratchet is driven to rotate by the pawl, so that the tray 10 rotates.

[0041] Specifically, multiple top penetration holes 6 and multiple bottom penetration holes 7 are respectively distributed along the radial direction of the movable cylinder 3. The horizontal movement direction of the vertical telescopic mechanism is set as the radial direction of the movable cylinder 3, and the top penetration holes 6, the bottom penetration holes 7 and the horizontal movement direction of the vertical telescopic mechanism are located in the same vertical plane.

[0042] Among them, the movable cylinder 3, the connecting cylinder 4 and the calibration tank 5 can all be set as cylinders. Multiple top penetration holes 6 and multiple bottom penetration holes 7 are respectively distributed along the radial direction of the movable cylinder 3, which can make the penetration points of the probe 2 more uniform and match the shape of the calibration tank 5.

[0043] Specifically, the vertical telescopic mechanism is set as a vertical telescopic rod.

[0044] Specifically, the vertical telescopic mechanism includes a telescopic rod extending towards and a moving member. The bottom end of the telescopic rod extending towards is connected to the moving member, the probe 2 is connected to the telescopic rod extending towards, and the top end of the moving member is horizontally movably connected to the bracket 1. The moving member is used to drive the telescopic rod extending towards and the probe 2 to move horizontally on the bracket 1.

[0045] For example, a horizontal slide rail is provided on the bracket 1, the moving member is set as a slider, and the slider is slidably installed on the horizontal slide rail. The length direction of the horizontal slide rail is along the radial direction of the movable cylinder 3.

[0046] Specifically, the drive assembly includes a movable cylinder motor 12 system and a gear. The motor rotation output shaft of the movable cylinder motor system 12 is connected to the wheel shaft of the gear; an annular rack is provided on the outer wall of the movable cylinder 3 and meshes with the gear. When the movable cylinder motor system 12 drives the movable cylinder 3 to rotate, the bracket 1 and the movable cylinder 3 can be connected by a connecting rod, and the bracket 1 and the movable cylinder 3 rotate synchronously.

[0047] Specifically, the vertical telescopic mechanism is connected to at least two probes 2, and the distance between adjacent probes 2 is equal to the distance between adjacent top penetration holes 6, so as to realize the simultaneous penetration of multiple probes 2 at one time to obtain the soil parameters of multiple parts of the sediment.

[0048] Specifically, flexible sealing rings are arranged on the inner walls of the top penetration hole 6 and the bottom penetration hole 7, so that when the probe 2 contacts the top penetration hole 6 and the bottom penetration hole 7, the sealing at the top penetration hole 6 and the bottom penetration hole 7 can be realized.

[0049] Embodiment 2 Please refer to Figure 1 and Figure 4 for the usage method of the static cone penetration calibration tank device described in Embodiment 1, which includes the following steps: Step S1: Close the enclosure member 11, place the test sample in a calibration tank 5, and seal the connection between the calibration tank 5 and the connecting cylinder 4; Step S2: Open the pipeline 9 for controlling the pressure in the connecting cylinder 4, start the high-pressure plunger pump 8, and after controlling the pressure in the connecting cylinder 4 to be the same as the pressure in the calibration tank 5, open the enclosure member 11; perform Steps S3 to S8 on one of the top penetration holes 6 and the bottom penetration hole 7 below it; Step S3: Open the top penetration hole 6 by opening the upper opening and closing member, pass the probe 2 through the top penetration hole 6 and extend it into the movable cylinder 3; open the pipeline 9 for controlling the movable cylinder 3, start the high-pressure plunger pump 8, and after controlling the pressure in the movable cylinder 3 to be the same as the pressure in the calibration tank 5, open the bottom penetration hole 7 below the top penetration hole by opening the lower opening and closing member; Step S4: Horizontally move the vertical telescopic mechanism on the bracket 1 to drive the probe 2 to move above the top penetration hole 6; Step S5: Drive the probe 2 to move downward through the top penetration hole 6 by the telescopic movement of the vertical telescopic mechanism in the vertical direction; Step S6: Make the probe 2 move downward through the bottom penetration hole 7 and make the probe 2 penetrate into the test sample in the calibration tank 5, and simultaneously collect the measurement data of the sensor; Step S7: Drive the probe 2 to move upward to above the bottom penetration hole 7 by the contraction movement of the vertical telescopic mechanism in the vertical direction, and then close the lower opening and closing member of the bottom penetration hole 7; Step S8: Drive the movable cylinder 3 and the probe 2 to rotate a preset angle around the axis of the movable cylinder 3 by the driving component, and then perform Steps S6 and S7; Step S9: After releasing the pressure in the movable cylinder 3, the vertical telescopic mechanism contracts and moves in the vertical direction, driving the probe 2 to move upward to above the top penetration hole 6, and performing Step S4 to make the probe 2 reach above another top penetration hole 6, and then performing Steps S3 to S8 on this another top penetration hole 6 and the bottom penetration hole 7 below it.

[0050] It can be seen that after the probe 2 penetrates the test sample once, the probe 2 is lifted so that the probe 2 rotates following the movable cylinder 3, and then the probe 2 penetrates the test sample again, thereby realizing multiple penetrations of the probe 2 into the test sample.

[0051] Among them, in Step S1, the marine sediment sample can be collected from the seabed and first stored in the drill tool, and then the sample is transferred from the drill tool to the calibration tank 5 through the sample delivery system and waits for the static cone penetration test.

[0052] In Step S3, the top penetration hole 6 is opened, and the probe 2 is inserted into the movable cylinder 3. At this time, the top of the probe 2 is above the bottom penetration hole 7, and all the bottom penetration holes 7 are in the closed state. The movable cylinder 3 and the calibration tank 5 are in a sealed state.

[0053] In Step S6, the data acquisition system is used to record the measurement data of the collected sensors.

[0054] In Step S7, after one penetration is completed, the probe 2 is raised to the original position, the bottom penetration hole 7 is closed, and it is not necessary to release the pressure in the movable cylinder 3. The movable cylinder 3 and the probe 2 are driven to rotate by the driving component, and then the static cone penetration test at this point is completed.

[0055] In Step S4, the probe 2 is driven to move by the moving part so that the probe 2 is aligned with the adjacent top penetration hole 6 and bottom penetration hole 7.

[0056] In Step S9, Steps S3 to S8 are performed on another top penetration hole 6 and the bottom penetration hole 7 below it to realize multiple penetrations at multiple points of the deep-sea sediment, so as to obtain detailed parameters of the soil mass.

[0057] Please refer to Figure 1 、 Figure 2 and Figure 5 , the method for using the above static cone penetration calibration tank device further includes the following steps: Step S10: Close the enclosing member 11 and remove the connection between the connecting cylinder 4 and the calibration tank 5; Step S11: Rotate the rotating part to drive the tray 10 to rotate, so that another calibration tank 5 reaches below the movable cylinder 3 and the connecting cylinder 4, and perform Steps S1 to S9 on this another calibration tank 5.

[0058] The connecting cylinder 4 and the calibration tank 5 can be connected by a clamp. Therefore, in step S10, the clamp connection between the connecting cylinder 4 and the calibration tank 5 is released, and the hydraulic sealing device is released to separate the connecting cylinder 4 from the calibration tank 5.

[0059] In step S11, the next calibration tank 5 is aligned with the connecting cylinder 4 and sealed. The enclosure 11 is opened to make the movable cylinder 3, the connecting cylinder 4 and the calibration tank 5 communicate with each other, and the pressure is stabilized. The above steps S1 to S9 are repeated to complete the switching and detection of the penetrated soil sample, and then step S10 can also be carried out.

[0060] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than limiting them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A static penetration calibration tank device, characterized in that: include: A bracket (1) and a probe (2), wherein the probe (2) is equipped with a sensor; A movable cylinder (3), the top and bottom ends of which are respectively provided with a top surface and a bottom surface; the top surface and the bottom surface of the movable cylinder (3) are respectively provided with a top penetration hole (6) and a bottom penetration hole (7), and the top penetration holes (6) and the bottom penetration holes (7) are respectively provided with at least two, and the number of the top penetration holes (6) and the bottom penetration holes (7) are equal; the top penetration holes (6) and the bottom penetration holes (7) are respectively distributed above and below in a one-to-one correspondence, and an upper opening and closing member and a lower opening and closing member are respectively movably provided thereon; the movable cylinder (3) is connected to the bracket (1); A connecting tube (4) having an open top and a movably provided enclosure member (11) at the bottom; the connecting tube (4) is coaxially connected to the bottom of the movable tube (3); A calibration tank (5) having an opening at the top and a bottom surface at the bottom; the calibration tank (5) is coaxially connected to the bottom of the connecting tube (4), and the calibration tank (5) is used to contain a test sample; A high-pressure plunger pump (8) is connected to the interior of the movable cylinder (3) and the connecting cylinder (4) through a pipeline (9); A vertical telescopic mechanism, which is horizontally movably mounted on the bracket (1) and connected to the probe (2), and is used to drive the probe (2) to move vertically and horizontally; A driving assembly is connected to the movable cylinder (3) and the bracket (1), and is used to drive the movable cylinder (3) and the bracket (1) to rotate synchronously around the axis of the movable cylinder (3).

2. The static penetration calibration tank device according to claim 1 is characterized in that: The calibration tanks (5) are arranged in at least two numbers and are arranged on a tray (10) in a distributed manner along a circumference; the tray (10) is coaxially connected to a rotating member, the circumference along which the plurality of calibration tanks (5) are distributed is coaxial with the rotating member, and the rotating member is used to drive the tray (10) and the plurality of calibration tanks (5) to rotate.

3. The static penetration calibration tank device according to claim 1 is characterized in that: The plurality of top penetration holes (6) and the plurality of bottom penetration holes (7) are respectively distributed along the radial direction of the movable cylinder (3); the horizontal movement direction of the vertical telescopic mechanism is set to be the radial direction of the movable cylinder (3); and the top penetration holes (6), the bottom penetration holes (7) and the horizontal movement direction of the vertical telescopic mechanism are located in the same vertical plane.

4. The static penetration calibration tank device according to claim 1 is characterized in that: The vertical telescopic mechanism comprises a vertical telescopic rod and a moving part.

5. The static penetration calibration tank device according to claim 1 is characterized in that: The vertical telescopic rod is connected to the bottom end of the moving member, the top end of the moving member is horizontally movably connected to the bracket (1), the probe (2) is connected to the vertical telescopic rod, and the moving member is used to drive the vertical telescopic rod and the probe (2) to move horizontally on the bracket (1).

6. The static penetration calibration tank device according to claim 1, characterized in that: The driving assembly comprises a motor and a gear, wherein the rotating output shaft of the motor is connected to the axle of the gear; an annular rack is arranged on the outer wall of the movable cylinder (3) and meshes with the gear.

7. The static penetration calibration tank device according to claim 1 is characterized in that: The vertical telescopic mechanism is connected to at least two of the probes (2), and the distance between adjacent probes (2) is equal to the distance between adjacent top penetration holes (6).

8. The static penetration calibration tank device according to any one of claims 1 to 7, characterized in that: Flexible sealing rings are provided on the inner walls of the top penetration hole (6) and the bottom penetration hole (7).

9. The method for using the static penetration calibration tank device according to any one of claims 1 to 8, characterized in that: The following steps are involved: Step S1, closing the enclosure (11), placing the test sample in a calibration tank (5), and sealingly connecting the calibration tank (5) to the connecting tube (4); Step S2, opening the pipeline (9) for controlling the pressure in the connecting tube (4), starting the high-pressure plunger pump (8), controlling the pressure in the connecting tube (4) to be consistent with the pressure in the calibration tank (5), and then opening the enclosure (11); performing steps S3 to S8 on one of the top penetration holes (6) and the bottom penetration hole (7) below it; Step S3, opening the top penetration hole (6) by opening the upper opening and closing piece, passing the probe (2) through the top penetration hole (6) and extending it into the movable cylinder (3); opening the pipeline (9) for controlling the movable cylinder (3), starting the high-pressure plunger pump (8), controlling the pressure in the movable cylinder (3) to be consistent with the pressure in the calibration tank (5), and then opening the bottom penetration hole (7) below the top penetration hole by opening the lower opening and closing piece; Step S4, moving the vertical telescopic mechanism horizontally on the bracket (1) to drive the probe (2) to move above the top penetration hole (6); Step S5, the vertical telescopic mechanism is extended in the vertical direction to drive the probe (2) to move downward and pass through the top penetration hole (6); Step S6, moving the probe (2) downward through the bottom penetration hole (7), and allowing the probe (2) to penetrate the experimental sample in the calibration tank (5), while collecting measurement data of the sensor; Step S7, the vertical telescopic mechanism is retracted and moved in the vertical direction, so as to drive the probe (2) to move upward to above the bottom penetration hole (7), and then the lower opening and closing member of the bottom penetration hole (7) is closed; Step S8, after the driving assembly drives the movable cylinder (3) and the probe (2) to rotate around the axis of the movable cylinder (3) by a preset angle, steps S6 and S7 are then performed; Step S9, after the pressure in the movable cylinder (3) is released, the vertical telescopic mechanism is contracted and moved in the vertical direction, driving the probe (2) to move upward to above the top penetration hole (6), and performing step S4, so that the probe (2) reaches above another top penetration hole (6), and then performing steps S3 to S8 on the other top penetration hole (6) and the bottom penetration hole (7) below it.

10. The method for using the static penetration calibration tank device according to claim 9, characterized in that: The following steps are also included: Step S10, closing the enclosure (11) and removing the connection between the connecting tube (4) and the calibration tank (5); Step S11, rotating the rotating member to drive the tray (10) to rotate, so that the other calibration tank (5) reaches below the movable cylinder (3) and the connecting cylinder (4), and performing steps S1 to S9 on the other calibration tank (5).

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