Device and method for measuring frost heaving property of frozen soil

Abstract

The present invention discloses a frozen soil frost heaving property measuring device and method, comprising: a lower plate, the lower plate is connected to an upper plate through a displacement side rod 1 and a displacement side rod 2, the displacement side rod 1 and the displacement side rod 2 are connected to a reading instrument arranged outside the fill above the upper plate through a transmission cable; a sleeve block, the displacement side rod 2 is fixed with a sleeve block through a connecting piece, and the two sleeve blocks surround the displacement side rod 1 at the connection with the displacement side rod 2, and the sleeve block is provided with a slide groove 1 and a slide groove 2. In the present invention, warm grease is wrapped at the connection between the displacement side rod 1 and the displacement side rod 2, and the low-temperature grease can isolate the displacement side rod 1 from the environment, thereby preventing water molecules on the displacement side rod 1 from aggregating to form fine crystal nuclei, and the water molecules outside the displacement side rod 1 are frozen, which further affects the displacement side rod 1 and the displacement side rod 2 to be blocked when relative sliding occurs, thereby causing deviation in the measurement result of the frost heaving property of the frozen soil.

Description

Technical Field

[0001] The invention relates to the technical field of frost heave measurement, and in particular to a device and method for measuring frost heave of frozen soil. Background Art

[0002] Soil whose surface is frozen in winter and completely melts in summer is called seasonally frozen ground.

[0003] The traditional frozen soil frost heave measurement uses a frost heave meter, which is an embedded inductive frequency modulation displacement meter consisting of a displacement measuring rod, large and small flanges, etc. It is suitable for measuring the compression or tensile deformation of the soil between the large and small flanges, and is suitable for long-term monitoring and automated measurement.

[0004] After the frost heave meter is buried in the soil, the soil is affected by environmental changes. The soil temperature gradually decreases as the ambient temperature decreases. When the temperature drops to a certain value, some water molecules in the soil gather to form tiny crystal nuclei, and then more water molecules are arranged around the crystal nuclei. The crystal nuclei grow steadily and the water begins to freeze.

[0005] When the water in the soil sticks to the displacement side rod of the frost heave meter, it will affect the normal displacement of the displacement side rod, resulting in a decrease in measurement accuracy.

[0006] By searching: Application number: CN201510174071.8 A method and device for on-site observation of soil frost heave of high-speed railway in seasonal frozen soil area, which avoids the above-mentioned problems by using plastic pipes and filling with low-temperature grease;

[0007] Application number: CN201811537454.7 The device and burial method for monitoring the frost heave, thaw and sink deformation of the soil around the freezing method construction, by filling antifreeze and lubricating liquid between the measuring rod and the casing, not only plays a lubricating role to ensure the sensitivity of the measuring rod moving up and down, but also ensures that the device will not be frozen in a low temperature environment and can work normally;

[0008] Through searching, it was found that an article published by the Chinese Academy of Sciences titled "Progress in the Study of Frost Heave Theory" mentioned: During the freezing process of fine-grained soil, the water in the unfrozen soil migrates into the frozen soil under the action of "freezing suction" and freezes, causing the frozen soil to expand in volume. Frost heave may affect the deformation of roads, pipelines and other projects in seasonally frozen soil areas, and may also cause deformation of frozen walls of tunnels and mines constructed using artificial freezing methods. It can be inferred that the water in the soil will reach the surface of the side rod during migration, and once the position of the side rod reaches the freezing temperature, the migrated water will freeze on the side rod.

[0009] By searching the existing frost heave meter products: such as the frost heave meter with product model YHX-0210, the product consists of a displacement sensor body, large and small flanges, an extended measuring rod, an installation protective tube, and an instrument wire.

[0010] The installation protective sleeve is installed between the side rods between the large and small flanges to protect the side rods:

[0011] If the size of the installation sleeve is fixed and cannot be expanded or changed, the displacement of the large and small flanges will be found during the frost heave test. Once the distance between the large and small flanges increases, the pipe mouth of the installation sleeve will be exposed, and soil particles or water molecules will fall into the side rod through the pipe mouth. Once too many water molecules accumulate and freeze as the temperature drops, they will directly affect the displacement of the side rods of the large and small flanges, thereby affecting the detection accuracy.

[0012] If the installation sleeve of the product is made of elastic material, and the upper and lower ends of the installation sleeve are respectively fixed to the large and small flanges, then when the installation sleeve is stored in the soil for a long time, it is necessary to consider whether the installation sleeve can always remain intact in the frozen soil, and whether the elastic force of the installation sleeve will affect the displacement of the large and small flanges, thereby affecting the accuracy. That is, the structures used in the application number: CN201510174071.8 Method and device for on-site observation of frost heave of high-speed railway soil in seasonal frozen soil areas and the application number: CN201811537454.7 Device and burial method for monitoring frost heave, thaw and settlement deformation of soil around freezing method construction, cannot solve the problem of excessive accumulation of water molecules and freezing at the side rods as the temperature drops, affecting the measurement accuracy.

[0013] Therefore, the traditional frost heave meter can be improved so that it can avoid the above-mentioned problems. Summary of the invention

[0014] The purpose of the present invention is to provide a device and method for measuring the frost heave of frozen soil in order to solve the above-mentioned problem.

[0015] In order to achieve the above object, the present invention adopts the following technical solutions:

[0016] The frozen soil frost heaving measuring device comprises:

[0017] The lower plate is connected to the upper plate through a displacement side rod 1 and a displacement side rod 2, and the displacement side rod 1 and the displacement side rod 2 are connected to a reading instrument arranged outside the filling soil above the upper plate through a transmission cable;

[0018] A sleeve block, wherein the displacement side rod 2 is fixed with the sleeve block through a connecting piece, and the two sleeve blocks surround the displacement side rod 1 at the connection with the displacement side rod 2, and the sleeve block is provided with a slide groove 1 and a slide groove 2, and the slide groove 1 and the slide groove 2 are both slidably connected with the displacement side rod 1;

[0019] A storage cavity is provided in the sleeve block, and the storage cavity cooperates with the matching piece to fill the storage cavity with low-temperature grease, resulting in the warm grease being wrapped around the connection between the displacement side rod one and the displacement side rod two.

[0020] Preferably, the connecting member includes a fixed plate fixedly connected to the outer wall of the second displacement side rod, and a vertical hole is provided on the fixed plate, the second displacement side rod is slidably connected to the circular hole provided on the circular sleeve, and the circular sleeve is rotatably connected with a rotating block 1 and a rotating block 2, a blocking block 1 is fixed to the bottom of the rotating block 1, a fixed rod is fixed to the sleeve block, the blocking block 1 is threadedly connected to the injection hole on one of the fixed rods, the blocking block 2 at the bottom of the rotating block 2 is slidably connected to the injection hole on the other fixed rod, a card slot is provided on the sleeve block, a card block is also fixed on the sleeve block, and the card block cooperates with the card slot to make the two sleeve blocks dock.

[0021] Preferably, the mating part includes a protrusion fixed on the sleeve block, and the protrusion abuts against the fixed disk, and there is a gap between the upper surface of the sleeve block and the lower surface of the fixed disk. The sleeve block is provided with a vent hole connected to the storage cavity, and the sleeve block is also provided with a connecting groove, and the connecting groove is connected to the second slide groove. The low-temperature grease can be injected into the storage cavity from the injection hole using a syringe, and the lower end of the sleeve block is provided with a pointed nozzle.

[0022] Preferably, the edge of the pointed mouth is sharp, so when the displacement side rod 1 and the displacement side rod 2 slide relative to each other, the pointed mouth can scrape off impurities adhered to the surface of the displacement side rod 1 to prevent the impurities from affecting the relative sliding of the displacement side rod 1 and the displacement side rod 2.

[0023] Preferably, a rubber ring is fixed on the sleeve block, and when the protrusion abuts against the bottom of the fixed disk, the rubber ring also abuts against the bottom of the fixed disk.

[0024] Preferably, a spring is sleeved on the second displacement side rod, one end of the spring abuts against the bottom of the upper plate, and the other end abuts against the circular sleeve, and an antifreeze layer is provided on the outside of the spring.

[0025] The method for using the frozen soil frost heave measuring device comprises the following steps:

[0026] S1: Test of frost heave meter: Press the upper and lower plates of the frost heave meter to observe whether the reading of the reading instrument connected to the cable is normal. If it is correct, proceed to the next step;

[0027] S2: Setting of low temperature grease: the low temperature grease can be directly injected into the storage chambers of the two sets, or after the two sets are connected to the displacement side rod 1 and the displacement side rod 2, the low temperature grease can be injected into the storage chamber using a syringe;

[0028] S3: Preliminary installation of the sleeve blocks: put the two sleeve blocks on the displacement side rod 1, and the block on one sleeve block is engaged with the slot on the other sleeve block, and the angles of the two sleeve blocks are rotated so that the fixing rods on the sleeve blocks are aligned with the vertical holes, and then the two sleeve blocks can be moved up until the protrusions on the sleeve blocks abut against the bottom of the fixing plate, and the fixing rods also extend into the vertical holes. At this time, a syringe can be used to inject low-temperature grease into the storage cavity through the injection hole until the low-temperature grease leaks slightly through the connecting groove and the air vent, and the surface storage cavity is filled with low-temperature grease;

[0029] S4: Fixing of the sleeve block: Under the elastic force of the spring, the circular sleeve moves downward until the first block is aligned with the injection hole of the fixed rod on one of the sleeve blocks, and the second block is aligned with the injection hole of the fixed rod on the other sleeve block. Rotating the first block can cause the first block to be connected with the injection hole through a thread during rotation, and the other injection hole is blocked by the second block. At this time, the installation of the sleeve block and the first displacement side rod and the second displacement side rod is completed;

[0030] S5: Placement of frost heave meters: Dig multiple holes of different depths in the frozen soil layer, place the lower plates of multiple frost heave meters of different sizes in the holes, manually tamp the lower plates and the bottom of the holes, then backfill with original soil and tamp it layer by layer. When the frozen soil shows frost heave deformation, the amount of frost heave deformation can be directly checked through the readout instrument.

[0031] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0032] 1. In the present application, warm grease is wrapped around the connection between the displacement side rod 1 and the displacement side rod 2. The low-temperature grease can isolate the displacement side rod 1 from the environment, thereby preventing water molecules on the displacement side rod 1 from aggregating to form tiny crystal nuclei. The water molecules outside the displacement side rod 1 freeze, further affecting the displacement side rod 1 and the displacement side rod 2 from sliding relative to each other, thereby causing deviations in the frost heave measurement results of the frozen soil.

[0033] 2. The connection method between the two sets of blocks and the displacement side rod one in the present application is relatively simple, and the connection method between the sets of blocks and the displacement side rods one and two is also simple. Therefore, the operator can quickly get started and perform the operation to measure the frost heave of frozen soil. The use of this device can avoid the influence of moisture in the soil on the measurement results of the frost heave meter, so the measurement results are more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 A schematic diagram of the overall structure of a frost heave meter provided according to an embodiment of the present invention is shown;

[0035] Figure 2 A partial structural schematic diagram of a frost heave meter provided according to an embodiment of the present invention is shown;

[0036] Figure 3 It shows a schematic diagram of a partial cross-sectional structure of a set block provided in an embodiment of the present invention;

[0037] Figure 4 It shows a schematic diagram of a circular sleeve structure provided in an embodiment of the present invention;

[0038] Figure 5 It shows a schematic diagram of the internal structure of the set block provided in an embodiment of the present invention;

[0039] Legend:

[0040] 1. Lower plate; 2. Upper plate; 3. Displacement side rod 1; 4. Displacement side rod 2; 5. Cable; 6. Fixed plate; 7. Vertical hole; 8. Spring; 9. Bushing block; 10. Fixed rod; 11. Injection hole; 12. Storage chamber; 13. Slide slot 1; 14. Slide slot 2; 15. Connecting slot; 16. Pointed mouth; 17. Slot; 18. Block; 19. Bump; 20. Air vent; 21. Round sleeve; 22. Round hole; 23. Rotating block 1; 24. Blocking block 1; 25. Rotating block 2; 26. Blocking block 2; 27. Reading instrument; 28. Rubber ring. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] See also Figure 1-Figure 5 , the present invention provides a technical solution:

[0043] The frozen soil frost heaving measuring device comprises:

[0044] The lower plate 1 is connected to the upper plate 2 through the displacement side rod 1 3 and the displacement side rod 2 4. The displacement side rod 1 3 and the displacement side rod 2 4 are connected to the reading instrument 27 set outside the fill above the upper plate 2 through the transmission cable 5. The frost heave meter is a direct reference to the prior art and will not be described in detail here.

[0045] The sleeve block 9 is fixed with the displacement side rod 2 4 by a connecting piece, and the two sleeve blocks 9 surround the displacement side rod 1 3 at the connection with the displacement side rod 2 4. The sleeve block 9 is provided with a slide groove 13 and a slide groove 2 14, and the slide groove 13 and the slide groove 2 14 are both slidably connected with the displacement side rod 1 3. Therefore, the displacement side rod 1 3 can maintain its own stability under the cooperation of the slide groove 1 13 and the slide groove 2 14 during movement, and there will be no shaking or other situations that are not conducive to the measurement of the device;

[0046] The storage cavity 12 is provided in the sleeve block 9, and the storage cavity 12 is matched with the matching piece to fill the storage cavity 12 with low-temperature grease, so that the warm grease is wrapped in the connection between the displacement side rod 1 3 and the displacement side rod 2 4. The low-temperature grease can isolate the displacement side rod 1 3 from the environment, thereby preventing the water molecules on the displacement side rod 1 3 from aggregating to form fine crystal nuclei, and the water molecules outside the displacement side rod 1 3 from freezing, further affecting the displacement side rod 1 3 and the displacement side rod 2 4 when relative sliding occurs, resulting in a hindrance, thereby causing a deviation in the measurement results of the frost heave of frozen soil.

[0047] Specifically, Figure 1 As shown, the connecting member includes a fixed plate 6 fixedly connected to the outer wall of the displacement side rod 24, and a vertical hole 7 is opened on the fixed plate 6, the displacement side rod 24 is slidably connected to the circular hole 22 opened on the round sleeve 21, and the round sleeve 21 is rotatably connected with a rotating block 1 23 and a rotating block 2 25, a blocking block 1 24 is fixed to the bottom of the rotating block 1 23, a fixed rod 10 is fixed to the sleeve block 9, the blocking block 1 24 is threadedly connected to the injection hole 11 on one of the fixed rods 10, and the blocking block 26 at the bottom of the rotating block 25 is slidably connected to the injection hole 11 on the other fixed rod 10, a slot 17 is opened on the sleeve block 9, and a clamping block 18 is also fixed on the sleeve block 9, and the clamping block 18 cooperates with the slot 17 to make the two sleeve blocks 9 dock.

[0048] A spring 8 is sleeved on the displacement side rod 24, and one end of the spring 8 abuts against the bottom of the upper plate 2, and the other end abuts against the circular sleeve 21, and an antifreeze layer is provided on the outside of the spring 8. Under the elastic force of the spring 8, the circular sleeve 21 can move downward and abut against the fixed plate 6, thereby playing a limiting effect on the circular sleeve 21.

[0049] Specifically, Figure 3 As shown, the matching part includes a protrusion 19 fixed on the sleeve block 9, and the protrusion 19 abuts against the fixed disk 6, and there is a gap between the upper surface of the sleeve block 9 and the lower surface of the fixed disk 6. The sleeve block 9 is provided with a vent hole 20 connected to the storage chamber 12. The sleeve block 9 is also provided with a connecting groove 15, and the connecting groove 15 is connected to the second slide groove 14. The low-temperature grease can be injected into the storage chamber 12 from the injection hole 11 using a syringe. The lower end of the sleeve block 9 is provided with a pointed mouth 16. The second slide groove 14 is connected to the connecting groove 15, and the connecting groove 15 increases the size of the second slide groove 14, and the connecting groove 15 does not affect the sliding of the second slide groove 14 and the displacement side rod 1 3. Since the connecting groove 15 increases the size of the second slide groove 14, the low-temperature grease in the storage chamber 12 can leak from the connecting groove 15 under the action of pressure, that is, when the low-temperature grease in the storage chamber 12 is full, continuing to inject low-temperature grease into the connecting groove 15 will cause the low-temperature grease to leak from the connecting groove 15.

[0050] The staff can judge whether the low-temperature grease in the connection groove 15 is filled according to the leakage of the low-temperature grease at the connection groove 15. Since the low-temperature grease is a solid uniform paste, or a substance in a fluid or semi-fluid state, it is used to seal the storage cavity 12 and prevent freezing in a low-temperature environment. Therefore, the displacement side rod 13 is affected by the low-temperature grease in the storage cavity 12, and the water molecules in the soil will not reach the displacement side rod 13 in the storage cavity 12, but form ice crystals and other substances on the displacement side rod 13, thereby affecting the normal extension and contraction of the displacement side rod 13 and the displacement side rod 24.

[0051] The edge of the beak 16 is sharp, so when the displacement side rod 1 3 and the displacement side rod 2 4 slide relative to each other, the beak 16 can scrape off the impurities adhering to the surface of the displacement side rod 1 3 to prevent the impurities from affecting the relative sliding of the displacement side rod 1 3 and the displacement side rod 2 4. A rubber ring 28 is fixed to the sleeve block 9, and when the protrusion 19 abuts against the bottom of the fixed plate 6, the rubber ring 28 also abuts against the bottom of the fixed plate 6.

[0052] The method for using the frozen soil frost heave measuring device comprises the following steps:

[0053] S1: Testing of the frost heave meter: Press the upper plate 2 and the lower plate 1 of the frost heave meter to observe whether the reading of the reading instrument 27 connected to the cable 5 is normal. After confirming that it is correct, proceed to the next step;

[0054] S2: Setting of low temperature grease: the low temperature grease can be directly injected into the storage chamber 12 of the two sets 9, or after the two sets 9 are connected with the displacement side rod 1 3 and the displacement side rod 2 4, the low temperature grease can be injected into the storage chamber 12 using a syringe;

[0055] S3: Preliminary installation of the sleeve block 9: The two sleeve blocks 9 are sleeved on the displacement side rod 1 3, and the clamping block 18 on one sleeve block 9 is clamped with the clamping groove 17 on the other sleeve block 9, and the angles of the two sleeve blocks 9 are rotated so that the fixing rod 10 on the sleeve block 9 is aligned with the vertical hole 7, and then the two sleeve blocks 9 can be moved up until the protrusion 19 on the sleeve block 9 abuts against the bottom of the fixing plate 6, and the fixing rod 10 also extends into the vertical hole 7, at this time, a syringe can be used to inject low-temperature grease into the storage chamber 12 through the injection hole 11, until the low-temperature grease leaks a little through the connecting groove 15 and the air vent 20, indicating that the storage chamber 12 is filled with low-temperature grease, so the displacement side rod 1 3 and the displacement side rod 2 4 will be protected by the low-temperature grease during the process of mutual extension and contraction, so the displacement side rod 1 3 and the displacement side rod 2 4 can remain smooth during the extension and contraction process;

[0056] S4: Fixing of the sleeve block 9: Under the elastic force of the spring 8, the circular sleeve 21 moves downward until the blocking block 1 24 is aligned with the injection hole 11 of the fixed rod 10 on one of the sleeve blocks 9, and the blocking block 2 26 is aligned with the injection hole 11 of the fixed rod 10 on the other sleeve block 9. The rotating block 1 23 is rotated, so that the blocking block 1 24 is connected with the injection hole 11 through a thread during rotation, and the other injection hole 11 is blocked by the blocking block 2 26. At this time, the installation of the sleeve block 9 and the displacement side rod 1 3 and the displacement side rod 2 4 is completed;

[0057] S5: Placement of frost heave meter: dig multiple holes of different depths in the frozen soil layer, place multiple frost heave meter lower plates 1 of different sizes in the holes respectively, manually compact the lower plate 1 and the bottom of the hole, backfill the original soil and compact it layer by layer. When the frozen soil frost heaves and deforms, the amount of frost heave deformation can be directly checked through the reading instrument 27. It is necessary to ensure that the cable 5 has a sufficient length when it is pre-buried in the soil, that is, when the device moves with the movement of the soil, the cable 5 will not be pulled and damaged, and the outside of the cable 5 needs to be covered with a protective cover to prevent the cable 5 from being damaged in harsh environments and affecting the normal use of the reading instrument 27.

[0058] The above description of the embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A frozen soil frost heave measuring device, characterized in that: include: A lower plate (1), the lower plate (1) being connected to an upper plate (2) via a first displacement side rod (3) and a second displacement side rod (4), wherein the first displacement side rod (3) and the second displacement side rod (4) are connected to a reading instrument (27) disposed outside the fill above the upper plate (2) via a transmission cable (5); A sleeve block (9), wherein the displacement side rod 2 (4) is fixed with the sleeve block (9) via a connecting piece, and the two sleeve blocks (9) surround the displacement side rod 1 (3) at the connection with the displacement side rod 2 (4), and the sleeve block (9) is provided with a slide groove 1 (13) and a slide groove 2 (14), and the slide groove 1 (13) and the slide groove 2 (14) are both slidably connected with the displacement side rod 1 (3); A storage cavity (12), wherein the sleeve block (9) is provided with a storage cavity (12), and the storage cavity (12) cooperates with the matching piece so that the low-temperature lubricating grease fills the storage cavity (12), resulting in the warm lubricating grease being wrapped around the connection between the displacement side rod 1 (3) and the displacement side rod 2 (4); The matching part comprises a protrusion (19) fixed on the sleeve block (9), and the protrusion (19) abuts against the fixed disk (6), and a gap exists between the upper surface of the sleeve block (9) and the lower surface of the fixed disk (6). The sleeve block (9) is provided with a vent hole (20) connected to the storage chamber (12). The sleeve block (9) is also provided with a connecting groove (15), and the connecting groove (15) is connected to the second slide groove (14). The low-temperature grease can be injected into the storage chamber (12) from the injection hole (11) using a syringe. The lower end of the sleeve block (9) is provided with a pointed nozzle (16); The edge of the pointed mouth (16) is sharp, so when the displacement side rod (3) and the displacement side rod (4) slide relative to each other, the pointed mouth (16) can scrape off impurities adhering to the surface of the displacement side rod (3), thereby preventing the impurities from affecting the relative sliding of the displacement side rod (3) and the displacement side rod (4); A rubber ring (28) is fixed on the sleeve block (9), and when the protrusion (19) abuts against the bottom of the fixed disk (6), the rubber ring (28) also abuts against the bottom of the fixed disk (6).

2. The frozen soil frost heave measuring device according to claim 1, characterized in that: The connecting member comprises a fixing plate (6) fixedly connected to the outer wall of the second displacement side rod (4), and a vertical hole (7) is provided on the fixing plate (6). The second displacement side rod (4) is slidably connected to a circular hole (22) provided on a circular sleeve (21), and a rotating block (23) and a second rotating block (25) are rotatably connected to the circular sleeve (21). A blocking block (24) is fixed to the bottom of the first rotating block (23), a fixing rod (10) is fixed to the sleeve block (9), the blocking block (24) is connected to an injection hole (11) on one of the fixing rods (10) by threading, and a blocking block (26) at the bottom of the second rotating block (25) is slidably connected to an injection hole (11) on the other fixing rod (10), and a clamping groove (17) is provided on the sleeve block (9). A clamping block (18) is also fixed to the sleeve block (9), and the clamping block (18) cooperates with the clamping groove (17) so that the two sleeve blocks (9) are butt-jointed.

3. The frozen soil frost heave measuring device according to claim 2, characterized in that: A spring (8) is sleeved on the second displacement side rod (4), one end of the spring (8) abuts against the bottom of the upper plate (2), and the other end abuts against the circular sleeve (21), and an antifreeze layer is provided on the outside of the spring (8).

4. A method for using the frozen soil frost heaving property measuring device according to any one of claims 1 to 3, characterized in that: The following steps are involved: S1: Testing of the frost heave meter: Press the upper plate (2) and the lower plate (1) of the frost heave meter to observe whether the reading of the reading instrument (27) connected to the cable (5) is normal. After confirming that it is correct, proceed to the next step; S2: Setting of low-temperature lubricating grease: the low-temperature lubricating grease may be directly injected into the storage chamber (12) of the two sleeve blocks (9), or the low-temperature lubricating grease may be injected into the storage chamber (12) using a syringe after the two sleeve blocks (9) are connected to the displacement side rod 1 (3) and the displacement side rod 2 (4); S3: Preliminary installation of the sleeve block (9): The two sleeve blocks (9) are sleeved on the displacement side rod (3), and the clamping block (18) on one sleeve block (9) is engaged with the clamping groove (17) on the other sleeve block (9), and the angles of the two sleeve blocks (9) are rotated so that the fixing rod (10) on the sleeve block (9) is aligned with the vertical hole (7), and then the two sleeve blocks (9) can be moved up until the protrusion (19) on the sleeve block (9) abuts against the bottom of the fixing plate (6), and the fixing rod (10) also extends into the vertical hole (7). At this time, a syringe can be used to inject low-temperature grease into the storage chamber (12) through the injection hole (11) until the low-temperature grease leaks slightly through the connecting groove (15) and the air vent (20), and the surface storage chamber (12) is filled with low-temperature grease; S4: Fixing of the sleeve block (9): Under the elastic force of the spring (8), the circular sleeve (21) moves downward until the first blocking block (24) is aligned with the injection hole (11) of the fixed rod (10) on one of the sleeve blocks (9), and the second blocking block (26) is aligned with the injection hole (11) of the fixed rod (10) on the other sleeve block (9). The first rotating block (23) is rotated, so that the first blocking block (24) is connected to the injection hole (11) through a thread during rotation, and the other injection hole (11) is blocked by the second blocking block (26). At this time, the installation of the sleeve block (9) and the first displacement side rod (3) and the second displacement side rod (4) is completed; S5: Placement of frost heave meters: A plurality of holes of different depths are excavated in the frozen soil layer, and a plurality of frost heave meter lower plates (1) of different sizes are respectively placed in the holes. After the lower plates (1) and the bottom of the holes are manually compacted, the original soil is backfilled and compacted layer by layer. When the frozen soil shows frost heave deformation, the frost heave deformation amount can be directly checked through the reading instrument (27).

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