Soil capillary rising height testing device and use method thereof

Abstract

The invention discloses a soil capillary rising height testing device, and relates to the technical field of soil capillary rising height testing, the soil capillary rising height testing device comprises a positioning mechanism, and the positioning mechanism is connected to the upper end of a vertical frame through a second lifting rope and a first lifting rope; a detection rod is mounted in the middle of the positioning mechanism; the positioning mechanism comprises a frame, a first driving assembly and a second driving assembly are arranged on the two sides of the frame correspondingly, and a rotating assembly is arranged on the bottom face of the frame. One side of the frame is connected with a vertical frame through a fixing assembly. The device has the beneficial effects that when the positioning mechanism is in the state of being perpendicular to the horizontal plane, the fixing assembly fixes the position of the positioning mechanism, then the detection rod is installed in the positioning mechanism, and then the detection rod is inserted into the ground through the second driving assembly for detection work; according to the device, the water content distribution of the soil in the vertical direction can be rapidly obtained in situ, the capillary rise height of the soil is rapidly obtained by adopting a plastic limit and water content curve intersection method, and meanwhile, the device can ensure that a detection result is accurate.

Description

Technical Field

[0001] The present invention relates to the technical fields of water conservancy and hydropower engineering and geotechnical mechanics, and in particular to a device for testing the capillary rise height of soil. Background Art

[0002] In plain areas or mountain basins, the groundwater level is buried relatively shallow along the banks of rivers, lakes or reservoirs. When the water level of rivers and reservoirs rises during the construction and operation of water conservancy projects, the groundwater level along the banks rises accordingly, which is likely to cause soil immersion, resulting in damage to building foundations, waterlogging of farmland and even flooding. To study and evaluate the degree of immersion disasters, it is necessary to study the capillary rise height of the soil along the banks.

[0003] Traditional methods for measuring the capillary rise height mainly include: capillary tube method, soil column method, intact specimen method, soil profile observation method, air-dried soil profile method, etc. These methods all require taking soil samples or digging deep pits on site, with large test workload, long working hours and large errors.

[0004] Secondly, when the test rod is inserted into the ground manually for testing, it is very easy to cause the rod to tilt below the ground, resulting in deviation of the test results. Summary of the Invention

[0005] In this part, as well as in the abstract and title of the specification of the present application, some simplifications or omissions may be made to avoid obscuring the purpose of this part, the abstract and the title of the specification, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0006] In view of the above problems existing in the above or prior art, the present invention is proposed.

[0007] Therefore, the purpose of the present invention is to provide a device for testing the capillary rise height of soil, which can quickly and accurately measure the capillary rise height of soil in-situ.

[0008] To solve the above technical problems, the present invention provides the following technical solution: A device for testing the capillary rise height of soil, which includes a positioning mechanism. The positioning mechanism is connected to the upper end of a vertical frame through a second suspension rope and a first suspension rope; a detection rod is installed in the middle of the positioning mechanism;

[0009] The positioning mechanism includes a frame. A first driving component and a second driving component are respectively arranged on both sides of the frame. A rotating component is arranged on the bottom surface of the frame; one side of the frame is connected to the vertical frame through a fixing component;

[0010] The detection rod includes a test main pipe. A number of electrodes are arranged on the test main pipe, and the distance between each electrode is the same; a data box is arranged at the upper end of the test main pipe, and a cone head is arranged at the lower end of the test main pipe;

[0011] The first driving component includes a first motor, the output end of the first motor is connected to a long shaft, a driving gear is provided at the other end of the long shaft, a first movable block is slidably sleeved on the long shaft, an infrared emitter is provided on one side of the first movable block, and an infrared receiver is provided on one side of the infrared emitter;

[0012] The rotating component includes a toothed ring, which meshes with the driving gear; the bottom surface of the toothed ring is connected to a first connecting collar through a second connecting rod, a telescopic rod is provided on the first connecting collar, and a pressing head is provided at the movable end of the telescopic rod, and the pressing head is close to the detection rod.

[0013] As a preferred solution of the soil capillary rise height testing device of the present invention, wherein: the frame includes a sleeve, an activity connection port is provided on the sleeve, one end of a first connecting rod is connected to the bottom surface of the sleeve, and the other end of the first connecting rod is connected to a bottom ring; a limiting protrusion is provided at the upper end of the sleeve; two side frames are provided at the edge of the bottom ring, and the first driving component and the second driving component are respectively provided on the two side frames;

[0014] A limiting protrusion is provided at the upper end of the sleeve.

[0015] As a preferred solution of the soil capillary rise height testing device of the present invention, wherein: the fixing component includes a housing, a side groove is provided on one side of the housing, a sliding rod is provided inside the housing, one end of the sliding rod is connected to the frame, and the other end of the sliding rod is placed inside the vertical frame; one end of the housing is connected to the vertical frame;

[0016] A first fixing port and a second fixing port are provided on the sliding rod, and balls are provided between the sliding rod and the inner wall of the housing.

[0017] As a preferred solution of the soil capillary rise height testing device of the present invention, wherein: the second driving component includes a second motor, the output end of the second motor is connected to a lead screw, a second movable block is provided on the lead screw, and the other end of the lead screw is movably connected to the bottom surface of the frame.

[0018] As a preferred solution of the soil capillary rise height testing device of the present invention, wherein: the connecting component is placed at the upper end of the frame;

[0019] The connecting component includes a second connecting collar, side connecting blocks are provided on both sides of the second connecting collar, and the inner wall of the second connecting collar is connected to the detection rod through a fixing head.

[0020] As a preferred embodiment of the soil capillary rise height testing device of the present invention, the following is provided: a groove is provided on the side surface of the lower end of the vertical frame, an adjusting frame is provided in the groove, the upper end of the adjusting frame is movably connected to the inner wall of the groove, and a foot pad is provided at the other end of the adjusting frame; a horizontal detector is further provided on the bottom surface of the vertical frame;

[0021] One end of the first suspension rope is movably connected to the vertical frame, the other end is connected to a plurality of the second suspension ropes, and the other ends of the second suspension ropes are movably connected to the upper end of the positioning mechanism.

[0022] As a preferred embodiment of the soil capillary rise height testing device of the present invention, the following is provided: data is transmitted between the electrode and the data box through a wire.

[0023] A method for using a soil capillary rise height testing device includes,

[0024] Step S1, assemble the equipment on site, install the vertical frame at a specific location, adjust the position of the positioning mechanism, and then install the detection rod inside the positioning mechanism;

[0025] Step S2, at the selected test site, use the second driving component to press the test rod into the ground;

[0026] Step S3, toggle the switch to energize the test rod electrode. After the data displayed on the panel is normal, use the host computer software to record the test data;

[0027] Step S4, draw a curve graph of the soil moisture content data obtained from the test in the depth direction, and at the same time draw the plastic limit moisture content and saturated moisture content of the soil, and calculate the capillary rise height according to the following formula

[0028] H = H C -H q :

[0029] In the formula, H is the capillary rise height, H c is the depth corresponding to the saturated moisture content, H q is the depth corresponding to the plastic limit moisture content.

[0030] The beneficial effects of the present invention: In the present invention, the positioning mechanism is used to position the detection location. Under the action of the first suspension rope and the self - gravity of the positioning mechanism, it is in a state perpendicular to the horizontal plane. The position of the positioning mechanism is fixed by the fixing component. Then, the detection rod for detection is installed inside the positioning mechanism. Then, the detection rod is inserted into the ground through the second driving component to carry out the detection work;

[0031] The device can quickly obtain the moisture content distribution in the vertical direction of the soil in situ, quickly obtain the soil capillary rise height by using the intersection method of the plastic limit and moisture content curve. At the same time, the device can ensure that the detection results are accurate and error - free. Brief Description of the Drawings

[0032] To more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings. Among them:

[0033] Figure 1 is the overall schematic diagram of the soil capillary rise height test device;

[0034] Figure 2 is one of the schematic diagrams of the positioning mechanism of the soil capillary rise height test device;

[0035] Figure 3 is another schematic diagram of the positioning mechanism of the soil capillary rise height test device;

[0036] Figure 4 is the schematic diagram of the sleeve of the soil capillary rise height test device;

[0037] Figure 5 is the partial structural schematic diagram of the soil capillary rise height test device;

[0038] Figure 6 is the internal structural schematic diagram of the detection rod of the soil capillary rise height test device;

[0039] Figure 7 is the structural schematic diagram of the fixing component of the soil capillary rise height test device;

[0040] Figure 8 is the schematic diagram of the calculation of the capillary rise height of the soil capillary rise height test device.

[0041] Reference Signs in the Drawings:

[0042] 100, Positioning mechanism; 101, Frame; 102, Rotating assembly; 103, Fixing assembly; 104, First driving assembly; 105, Second driving assembly; 106, Connecting assembly; 200, Upright frame; 201, Adjusting frame; 202, First suspension rope; 203, Second suspension rope; 204, Horizontal detector; 205, Foot pad; 101a, Sleeve; 101b, Movable connection port; 101c, First connecting rod; 101d, Bottom ring; 101e, Limit protrusion; 101f, Side frame; 102a, Toothed ring; 102b, Second connecting rod; 102c, First connecting collar; 102d, Telescopic rod; 102e, Extrusion head; 103a, Sheath; 103b, Sliding rod; 103c, Side groove; 103d, First fixing port; 103e, Second fixing port; 103f, Ball; 104a, First motor; 104b, Long shaft; 104c, Driving gear; 104d, Infrared emitter; 104e, Infrared receiver; 104f, First movable block; 105a, Second motor; 105b, Lead screw; 105c, Second movable block; 106a, Second connecting collar; 106b, Side connecting block; 106c, Fixed head; 300, Detection rod; 301, Test main pipe; 302, Electrode; 303, Taper head; 304, Data box; 305, Conducting wire. Detailed implementation manners

[0043] To make the above objects, features, and advantages of the present invention more apparent and understandable, the following will describe the detailed implementation manners of the present invention with reference to the accompanying drawings of the specification.

[0044] In the following description, many specific details are set forth to fully understand the present invention. However, the present invention can also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0045] Secondly, the so-called "one embodiment" or "embodiment" herein refers to specific features, structures, or characteristics that can be included in at least one implementation manner of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it an individual or selectively exclusive embodiment with other embodiments.

[0046] Embodiment 1

[0047] Referring to Figures 1 to 8 , this is the first embodiment of the present invention. This embodiment provides a device for testing the capillary rise height of soil, which includes a positioning mechanism 100. The positioning mechanism 100 is connected to the upper end of the upright frame 200 through the second suspension rope 203 and the first suspension rope 202; a detection rod 300 is installed in the middle of the positioning mechanism 100;

[0048] The positioning mechanism 100 includes a frame 101. On both sides of the frame 101, a first driving component 104 and a second driving component 105 are respectively provided. A rotating component 102 is provided on the bottom surface of the frame 101. One side of the frame 101 is connected to the vertical frame 200 through a fixing component 103;

[0049] Preferably, the test main rod is a thick-walled hollow stainless steel pipe, 1500 mm long, with an inner diameter of Ф30 mm and an outer diameter of Ф60 mm. On one side of the test rod, holes are respectively opened at 50 mm, 150 mm, 250 mm, 350 mm, 450 mm, 550 mm, 650 mm, 750 mm, 850 mm, 950 mm, 1050 mm, 1150 mm, 1250 mm, 1350 mm, and 1450 mm to install sensors. The holes are arranged with through-thread, and the pitch is 2 mm. Four circles of threads with a pitch of 4 mm are arranged in the inner holes at both ends of the test main rod.

[0050] The detection rod 300 includes a test main pipe 301. A number of electrodes 302 are provided on the test main pipe 301, and the distance between each electrode 302 is the same. A data box 304 is provided at the upper end of the test main pipe 301, and a cone head 303 is provided at the lower end of the test main pipe 301;

[0051] Preferably, the drill bit is a solid stainless steel workpiece. The length of the cone head is 90 mm, the cone angle is 18.4°, the tail is a bolt connected fixedly, the diameter of the bolt is Ф30 mm, the length is 10 mm, the bolt is an external thread, the pitch is 4 mm, the number of turns is 4 turns, and a spiral groove is provided on the outside. The cone head is connected to the head of the test main rod.

[0052] Preferably, the electrode is a copper column buried in insulating resin. The tail of the copper column is connected to a wire, and the wire is led to the data box at the tail through the central hole of the test main rod. The diameter of the copper column is Ф8 mm, the height is 10 mm, and it is embedded in the center of the insulating resin. The diameter of the insulating resin cylinder is Ф15 mm, the height is 15 mm, and the surface is provided with through-thread, and the pitch is 2 mm. The insulating resin cylinder with the buried copper column is fixedly installed in the hole of the test main rod. The copper column, the wire, and the stainless steel test main rod form a test circuit.

[0053] Preferably, the data box is a stainless steel workpiece, with an outer diameter of Ф60 mm, a wall thickness of 5 mm, and a stud fixedly connected at the bottom. The diameter of the stud is Ф30 mm, the pitch is 4 mm, and the length is 10 mm. 2.5 turns of threads with a pitch of 2 mm are arranged at the upper opening of the data box. A data acquisition chip is arranged in the data box. The input side of the chip is connected to the wires of all 15 electrodes, and the output side is a 485 signal, which is connected to the display and USB interface on the cover plate; a 5V rechargeable battery and an acquisition chip are installed in the data box, and the acquisition chip is connected to the wires of the 15 electrodes on the test main rod.

[0054] The first driving component 104 includes a first motor 104a. The output end of the first motor 104a is connected to a long shaft 104b. A driving gear 104c is provided at the other end of the long shaft 104b. A first movable block 104f is slidably sleeved on the long shaft 104b. An infrared transmitter 104d is provided on one side of the first movable block 104f. An infrared receiver 104e is provided on one side of the infrared transmitter 104d.

[0055] Preferably, the infrared transmitter 104d and the infrared receiver 104e are in a state of mutually transmitting data during the insertion process of the detection rod 300. The position of the infrared transmitter 104d is detected. When the position of the infrared transmitter 104d stagnates, the first motor 104a will start. At the same time, the fixing head 106c releases the detection rod 300, the pressing head 102e is fixed to the detection rod 300, and the second motor 105a stops working. The rotating conical head 303 is used to break through hard objects.

[0056] When the position of the infrared transmitter 104d continues to change, the device resumes the state when detecting the insertion of the detection rod 300.

[0057] The rotating component 102 includes a toothed ring 102a, and the toothed ring 102a meshes with the driving gear 104c; the bottom surface of the toothed ring 102a is connected to a first connecting collar 102c through a second connecting rod 102b. A telescopic rod 102d is provided on the first connecting collar 102c. A pressing head 102e is provided at the movable end of the telescopic rod 102d, and the pressing head 102e is close to the detection rod 300.

[0058] Preferably, the upper end of the toothed ring 102a is movably connected to the bottom surface of the bottom ring 101d; the driving gear 104c drives the toothed ring 102a to rotate by a multiple value of 180 degrees.

[0059] The frame 101 includes a sleeve 101a. An activity connection port 101b is provided on the sleeve 101a. One end of a first connecting rod 101c is connected to the bottom surface of the sleeve 101a, and the other end of the first connecting rod 101c is connected to a bottom ring 101d; a limit protrusion 101e is provided at the upper end of the sleeve 101a; two side frames 101f are provided at the edge of the bottom ring 101d, and the first driving component 104 and the second driving component 105 are respectively provided on the two side frames 101f.

[0060] A limit protrusion 101e is provided at the upper end of the sleeve 101a.

[0061] Preferably, when the detection rod 300 is installed in the sleeve 101a, the limit protrusion 101e can ensure that the detection rod 300 is in a neutral position in the sleeve 101a.

[0062] The fixing component 103 includes a housing 103a. One side of the housing 103a is provided with a side groove 103c. Inside the housing 103a, there is a sliding rod 103b. One end of the sliding rod 103b is connected to the frame 101, and the other end of the sliding rod 103b is placed inside the vertical frame 200. One end of the housing 103a is connected to the vertical frame 200.

[0063] The sliding rod 103b is provided with a first fixing port 103d and a second fixing port 103e. There are balls 103f between the sliding rod 103b and the inner wall of the housing 103a.

[0064] The second driving component 105 includes a second motor 105a. The output end of the second motor 105a is connected to a lead screw 105b. The lead screw 105b is provided with a second movable block 105c. The other end of the lead screw 105b is movably connected to the bottom surface of the frame 101.

[0065] The connecting component 106 is placed at the upper end of the frame 101.

[0066] The connecting component 106 includes a second connecting collar 106a. Both sides of the second connecting collar 106a are provided with side connecting blocks 106b. The inner wall of the second connecting collar 106a is connected to the detection rod 300 through a fixing head 106c.

[0067] On the side surface of the lower end of the vertical frame 200, there is a groove. Inside the groove, there is an adjusting frame 201. The upper end of the adjusting frame 201 is movably connected to the inner wall of the groove. The other end of the adjusting frame 201 is provided with a foot pad 205. On the bottom surface of the vertical frame 200, there is also a horizontal detector 204.

[0068] Preferably, adjusting frames 201 are provided on both sides of the vertical frame 200. When installing the vertical frame 200, the position of the vertical frame 200 is adjusted by using the adjusting frames 201 so that one of the two horizontal detectors 204 showing the front-back horizontal state is in a horizontal state.

[0069] One end of the first lifting rope 202 is movably connected to the vertical frame 200, and the other end is connected to a plurality of second lifting ropes 203. The other ends of the second lifting ropes 203 are movably connected to the upper end of the positioning mechanism 100.

[0070] Data is transmitted between the electrode 302 and the data box 304 through a wire 305.

[0071] Preferably, when the positioning mechanism 100 is in a stable state, the sliding rod 103b may be in a pulled state. At this time, it is fixed by using a bolt between the first fixing port 103d or the second fixing port 103e and the side groove 103c.

[0072] Preferably, a controller is provided inside the device, and the model of the controller is GPU222XP.

[0073] Preferably, the frame 101 has a symmetrical structure, and the first driving component 104 and the second driving component 105 have the same weight.

[0074] A method for using a soil capillary rise height testing device includes:

[0075] Step S1: Assemble the device on-site. Install the vertical frame 200 at a specific location, adjust the position of the positioning mechanism 100, and then install the detection rod 300 inside the positioning mechanism 100.

[0076] Step S2: At the selected test site, use the second driving component 105 to press the test rod into the ground.

[0077] Step S3: Toggle the switch to energize the test rod electrode. After the data displayed on the panel is normal, use the host computer software to record the test data.

[0078] Step S4: Plot a curve of the soil moisture content data obtained from the test in the depth direction. At the same time, plot the plastic limit moisture content and the saturated moisture content of the soil, and calculate the capillary rise height according to the following formula

[0079] H = H C -H q :

[0080] In the formula, H is the capillary rise height, H c is the depth corresponding to the saturated moisture content, and H q is the depth corresponding to the plastic limit moisture content.

[0081] Before use, select typical soils such as clay, loam, sandy loam, etc., and set a group of

[0082] known moisture contents to calibrate the test rod and obtain the calibration curve for the corresponding soil type.

[0083] During operation, the test main rod, soil, electrode, and wire form a circuit as shown in the following figure. Measure the voltage of the soil at a specific length between the test main rod and the electrode, convert it into conductivity using the internal circuit, and then convert it into the soil moisture content.

[0084] In summary, in the device, the positioning mechanism 100 is used to position the detection location. Under the action of the first lifting rope 202 and the gravity of the positioning mechanism 100 itself, it is in a state perpendicular to the horizontal plane. The fixed component 103 is used to fix the position of the positioning mechanism 100. Then, the detection rod 300 for detection is installed inside the positioning mechanism 100. After that, the detection rod 300 is inserted into the ground through the second driving component 105 to perform the detection work;

[0085] The device can quickly obtain the water content distribution in the vertical direction of the soil in-situ, and adopt the intersection method of the plastic limit and the water content curve to quickly obtain the capillary rise height of the soil. At the same time, the device can ensure the accuracy of the detection results.

[0086] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered by the scope of the claims of the present invention.

Claims

1. A soil capillary rise height testing device, characterized in that: including, a positioning mechanism (100), the positioning mechanism (100) is connected to the upper end of the vertical frame (200) through a second lifting rope (203) and a first lifting rope (202); a detection rod (300) is installed in the middle of the positioning mechanism (100); the positioning mechanism (100) includes a frame (101), a first driving component (104) and a second driving component (105) are respectively arranged on both sides of the frame (101), and a rotating component (102) is arranged on the bottom surface of the frame (101); one side of the frame (101) is connected to the vertical frame (200) through a fixing component (103); the detection rod (300) includes a test main pipe (301), a plurality of electrodes (302) are arranged on the test main pipe (301), and the distance between each electrode (302) is the same; a data box (304) is arranged at the upper end of the test main pipe (301), and a cone head (303) is arranged at the lower end of the test main pipe (301); the first driving component (104) includes a first motor (104a), the output end of the first motor (104a) is connected to a long shaft (104b), a driving gear (104c) is arranged at the other end of the long shaft (104b), a first movable block (104f) is slidably sleeved on the long shaft (104b), an infrared transmitting head (104d) is arranged on one side of the first movable block (104f), and an infrared receiving head (104e) is arranged on one side of the infrared transmitting head (104d); the rotating component (102) includes a toothed ring (102a), and the toothed ring (102a) meshes with the driving gear (104c); the bottom surface of the toothed ring (102a) is connected to a first connecting collar (102c) through a second connecting rod (102b), a telescopic rod (102d) is arranged on the first connecting collar (102c), and an extrusion head (102e) is arranged at the movable end of the telescopic rod (102d), and the extrusion head (102e) is close to the detection rod (300).

2. The soil capillary rise height testing device according to claim 1, wherein: the frame (101) includes a sleeve (101a), a movable connection port (101b) is arranged on the sleeve (101a), one end of a first connecting rod (101c) is connected to the bottom surface of the sleeve (101a), and the other end of the first connecting rod (101c) is connected to a bottom ring (101d); a limiting protrusion (101e) is arranged at the upper end of the sleeve (101a); two side frames (101f) are arranged at the edge of the bottom ring (101d), and the first driving component (104) and the second driving component (105) are respectively arranged on the two side frames (101f); a limiting protrusion (101e) is arranged at the upper end of the sleeve (101a).

3. The soil capillary rise height testing device according to claim 1, characterized in that: The fixed component (103) includes a housing (103a). One side of the housing (103a) is provided with a side groove (103c). Inside the housing (103a), there is a sliding rod (103b). One end of the sliding rod (103b) is connected to the frame (101), and the other end of the sliding rod (103b) is placed inside the vertical frame (200). One end of the housing (103a) is connected to the vertical frame (200). The sliding rod (103b) is provided with a first fixing port (103d) and a second fixing port (103e). There are balls (103f) between the sliding rod (103b) and the inner wall of the housing (103a).

4. The soil capillary rise height testing device according to claim 1, characterized in that: The second driving component (105) includes a second motor (105a). The output end of the second motor (105a) is connected to a lead screw (105b). A second movable block (105c) is provided on the lead screw (105b). The other end of the lead screw (105b) is movably connected to the bottom surface of the frame (101).

5. The soil capillary rise height testing device according to claim 1, characterized in that: The connecting component (106) is placed at the upper end of the frame (101). The connecting component (106) includes a second connecting collar (106a). Side connecting blocks (106b) are provided on both sides of the second connecting collar (106a). The inner wall of the second connecting collar (106a) is connected to the detection rod (300) through a fixing head (106c).

6. The soil capillary rise height testing device according to claim 1, characterized in that: On the side surface at the lower end of the vertical frame (200), there is a groove. An adjusting frame (201) is provided in the groove. The upper end of the adjusting frame (201) is movably connected to the inner wall of the groove. The other end of the adjusting frame (201) is provided with a foot pad (205). A horizontal detector (204) is also provided on the bottom surface of the vertical frame (200). One end of the first lifting rope (202) is movably connected to the vertical frame (200), and the other end is connected to a plurality of the second lifting ropes (203). The other ends of the second lifting ropes (203) are movably connected to the upper end of the positioning mechanism (100).

7. The soil capillary rise height test device according to claim 1, characterized in that: Data is transmitted between the electrode (302) and the data box (304) through a wire (305).

8. The soil capillary rise height testing device according to claim 1, characterized in that: The fixed component (103) is integrally arc-shaped. The fixed component (103) is located on an annular track with the connection point between the first lifting rope (202) and the vertical frame (200) as the center of the circle.

9. A method for using a soil capillary rise height testing device, characterized in that: Including Step S1: Assemble the equipment on-site. Install the vertical frame (200) at a specific location, adjust the position of the positioning mechanism (100), and then install the detection rod (300) inside the positioning mechanism (100). Step S2: At the selected test location, use the second driving component (105) to press the test rod into the ground. Step S3: Toggle the switch to energize the electrode of the test rod. After the data displayed on the panel is normal, use the upper computer software to record the test data. Step S4: Draw a curve graph of the soil moisture content data obtained from the test in the depth direction. At the same time, draw the plastic limit moisture content and saturated moisture content of the soil, and calculate the capillary rise height according to the following formula H = H C -H q : where H is the capillary rise height, H c is the depth corresponding to the saturated water content, H q is the depth corresponding to the plastic limit water content.

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