Lever type hard soil uniaxial compression deformation test device

Abstract

The invention relates to the technical field of geotechnical testing, and discloses a lever type hard soil uniaxial compression deformation testing device which comprises a supporting mechanism, a sealed type bearing mechanism and a lever type static pressure mechanism. The lever type static pressure mechanism comprises a lever type pressurizing assembly and a sample loading assembly, and the lever type pressurizing assembly comprises a lever part and a weight part; the weight stabilizing mechanism is used for limiting the central axis of the weight part to be always perpendicular to the horizontal plane; the sealed solution chamber is formed outside the sample, the sample is subjected to dead weight pressurization through the lever type static pressure mechanism, so that the volume change of the sample is obtained through the volume change in the solution chamber, and the weight stabilizing mechanism is additionally arranged, so that the stability of the weight loading table can be kept in the weight adding process; therefore, pressure fluctuation data generated when the weights are additionally arranged are completely eradicated, and the accuracy of experimental data can be effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of geotechnical testing, and more specifically, it relates to a lever-type uniaxial compression deformation test device for hard soil. Background Art

[0002] Scholars at home and abroad divide geological bodies into rock masses (rocks) and soil masses (soils), which have become the respective independent research objects of rock mechanics and soil mechanics. Under the guidance of this trend of thought, the research on swelling rocks and swelling soils is carried out separately. However, with the in-depth research, countries have encountered a large number of geological bodies that are "neither rock nor soil" and "seemingly rock but not rock, seemingly soil but not soil".

[0003] The long-term uniaxial compressive strength of geotechnical specimens is replaced by the short-term compressive strength value. However, the short-term compressive strength value does not conform to the compressive process in the actual environment. Moreover, the test period for the long-term uniaxial compressive strength is relatively long, and it is not stable enough to manually control the instrument. For example, when adding weights, it may cause the weight loading platform to vibrate and other influencing factors, resulting in large discreteness and large errors in the test data. Summary of the Invention

[0004] The purpose of the present invention is to provide a lever-type uniaxial compression deformation test device for hard soil to solve the above problems.

[0005] The present invention provides a lever-type uniaxial compression deformation test device for hard soil, including: A support mechanism, on which a sealed bearing mechanism and a lever-type static pressure mechanism are fixedly arranged. The sealed bearing mechanism is used to form a sealed environment outside the specimen, and the lever-type static pressure mechanism is used to apply a set pressure to the specimen in the sealed bearing mechanism; The lever-type static pressure mechanism includes a lever-type pressurizing component connected to the support mechanism and a specimen loading component slidably connected to the support mechanism. The lever-type pressurizing component is used to apply a set pressure to the specimen loading component, and the specimen loading component is used to transfer the pressure applied by the lever-type pressurizing component to the specimen in the sealed bearing mechanism. The lever-type pressurizing component includes a lever part and a weight part. The lever part is hinged to the specimen loading component, and the weight part is movably connected to a position of the lever part far from the specimen loading component; A weight stabilizing mechanism, which is connected to the support mechanism and is arranged directly below the weight part. The weight stabilizing mechanism is used to limit the central axis of the weight part to be always perpendicular to the horizontal plane.

[0006] As a further optimized solution of the present invention, the support mechanism includes a support platform, a hollow guide tube connected to the middle position of the support platform, and an annular connection platform connected to the upper end of the hollow guide tube. The lever part is connected to the annular connection platform, and the specimen loading assembly is slidably connected to the annular connection platform.

[0007] As a further optimized solution of the present invention, the lever part includes a hinge frame connected to the annular connection platform, a lever hinged to the hinge frame, and a limit frame connected to the annular connection platform. The limit frame and the hinge frame are symmetrically arranged on the annular connection platform, and a slideway for cooperating with the specimen loading assembly is provided on the lever.

[0008] As a further optimized solution of the present invention, the weight part includes a weight loading platform and a plurality of weight blocks detachably connected to the weight loading platform. The weight loading platform is movably connected to the lever.

[0009] As a further optimized solution of the present invention, the specimen loading assembly includes a pressure transmission frame slidably connected to the lever, a limit rod and a pressure application rod connected to the pressure transmission frame, and a micrometer connected between the pressure transmission frame and the sealed bearing mechanism. The micrometer is used to obtain the distance change data between the pressure transmission frame and the upper end of the sealed bearing mechanism. The limit rod is slidably connected to the annular connection platform, and the pressure application rod and the limit rod are coaxially arranged.

[0010] As a further optimized solution of the present invention, the sealed bearing mechanism includes an outer cylinder, an inner cylinder connected to the bottom of the outer cylinder, a cover detachably connected to the upper opening of the outer cylinder, a first permeable stone and a second permeable stone arranged inside the inner cylinder, a water inlet pipe, a first drain pipe and a second drain pipe connected to the bottom of the outer cylinder, a water measuring cylinder connected to the outer wall of the outer cylinder, and a conduit connected between the outer cylinder and the cover. The internal space of the water measuring cylinder is communicated with the internal space of the outer cylinder through the conduit. The water inlet pipe and the first drain pipe are both communicated with the space between the outer cylinder and the first permeable stone. The second drain pipe is communicated with the internal space of the first permeable stone. A through hole one for the pressure application rod to pass through is provided in the middle of the cover, and a seal matching the pressure application rod is provided at the through hole one.

[0011] As a further optimized solution of the present invention, the weight stabilizing mechanism includes a position adjusting assembly and a clamping assembly connected to the position adjusting assembly. The position adjusting assembly is used to drive the central axis of the clamping assembly to be coaxial with the central axis of the weight part, and the clamping assembly is used to clamp the weight part.

[0012] As a further optimization solution of the present invention, the position adjustment assembly includes a linear drive assembly, a sliding plate slidably connected to the linear drive assembly, an integrated motor I and a telescopic rod I fixedly connected to the sliding plate, a screw rod movably connected to the sliding plate, and a gear transmission group provided inside the sliding plate. The integrated motor I drives the screw rod to rotate through the gear transmission group. The other end of the telescopic rod I is fixedly connected to the clamping assembly. The screw rod is threadedly connected to the clamping assembly. The screw rod and the telescopic rod I are symmetrically arranged.

[0013] As a further optimization solution of the present invention, the clamping assembly includes a housing I, a housing II detachably connected to the housing I, a small bevel gear movably connected to the housing I, an integrated motor II fixedly connected to the outer wall of the housing I, a large bevel gear provided between the housing I and the housing II, a plurality of chutes provided on the housing II, and clamping blocks provided in the chutes. The large bevel gear is provided with a flat spiral thread, and the clamping blocks are provided with arc-shaped threads matching the flat spiral thread. The output shaft end of the integrated motor II is connected to the small bevel gear, and the small bevel gear meshes with the large bevel gear.

[0014] As a further optimization solution of the present invention, an adjustable backpressure mechanism is connected to the outer wall of the outer cylinder. The adjustable backpressure mechanism is used to drive the liquid in the water measuring cylinder to flow back into the outer cylinder. The adjustable backpressure mechanism includes a fitting connected to the outer wall of the outer cylinder, a telescopic rod II connected to the fitting, a fixed ring connected to the other end of the telescopic rod II, a rotating plate movably connected to the fixed ring, a through hole II provided in the middle of the fixed ring, a screw hole and a ventilation hole I provided in the middle of the rotating plate, a plastic sheet I connected to the inner wall of the screw hole, a corrugated pipe and a spring fixedly connected to the rotating plate, a pressing plate fixedly connected to the other end of the spring, a ventilation hole II provided at the middle position of the pressing plate, and a plastic sheet II connected to the lower end surface of the ventilation hole II. Only one end of the plastic sheet I and the plastic sheet II is fixedly connected to the inner wall of the screw hole and the pressing plate respectively. The plastic sheet I and the plastic sheet II respectively cover the ventilation hole I and the ventilation hole II.

[0015] The beneficial effects of the present invention are as follows: The present invention forms a sealed solution chamber with the outside of the specimen, and applies static gravity pressure to the specimen through a lever-type hydrostatic pressure mechanism, so as to obtain the volume change of the specimen through the volume change in the solution chamber, and a weight stabilizing mechanism is added, which can maintain the stability of the weight loading platform during the process of adding weights, thereby eliminating the generation of pressure fluctuation data when adding weights, and effectively improving the accuracy of experimental data. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is the overall structural schematic diagram of the present invention; Figure 2is a cross-sectional view of the sealed bearing mechanism of the present invention; Figure 3 The present invention Figure 2 A magnified view of point A in FIG; Figure 4 This is a diagram showing the cooperation between the lever-type static pressure mechanism and the support mechanism of the present invention; Figure 5 It is a structural schematic diagram of the weight stabilizing mechanism of the present invention; Figure 6 It is a partial cross-sectional view of the clamping assembly of the present invention.

[0017] In the figure: 1. Support mechanism; 101. Support platform; 102. Hollow guide tube; 103. Annular connecting platform; 2. Lever-type static pressure mechanism; 21. Lever-type pressurizing assembly; 2101. Hinge; 2102. Lever; 2103. Weight loading platform; 2104. Limiting frame; 22. Sample loading assembly; 2201. Pressure transmission frame; 2202. Pressurizing rod; 2203. Dial indicator; 2204. Limiting rod; 3. Sealed bearing mechanism; 301. Outer cylinder; 302. Cover; 303. Inner cylinder; 304. Permeable stone 1; 305. Permeable stone 2; 306. Water inlet pipe; 307. Drain pipe 1; 308. Drain pipe 2; 309. Water measuring cylinder; 310. Conduit; 4. Weight Code stabilization mechanism; 41. Position adjustment component; 4101. Linear drive component; 4102. Sliding plate; 4103. Integrated motor one; 4104. Screw; 4105. Telescopic rod one; 42. Clamping component; 4201. Housing one; 4202. Housing two; 4203. Integrated motor two; 4204. Large bevel gear; 4205. Slide; 4206. Clamping block; 4207. Small bevel gear; 5. Adjustable back pressure mechanism; 501. Telescopic rod two; 502. Fixed ring; 503. Rotating plate; 504. Bellows; 505. Spring; 506. Pressure plate; 507. Vent one; 508. Plastic sheet one; 509. Vent two; 510. Plastic sheet two. DETAILED DESCRIPTION

[0018] The subject matter described herein will now be discussed with reference to example embodiments. It should be understood that these embodiments are discussed solely to enable those skilled in the art to better understand and implement the subject matter described herein. Additionally, features described with respect to some examples may also be combined in other examples.

[0019] like Figures 1 to 6 As shown, a lever-type hard soil uniaxial compression deformation test device comprises: The support mechanism 1 is fixedly provided with a sealed bearing mechanism 3 and a lever-type hydrostatic pressure mechanism 2. The sealed bearing mechanism 3 is used to form a sealed environment outside the specimen, and the lever-type hydrostatic pressure mechanism 2 is used to apply a set pressure to the specimen in the sealed bearing mechanism 3; The lever-type hydrostatic pressure mechanism 2 includes a lever-type pressurizing component 21 connected to the support mechanism 1 and a specimen loading component 22 slidably connected to the support mechanism 1. The lever-type pressurizing component 21 is used to apply a set pressure to the specimen loading component 22, and the specimen loading component 22 is used to transfer the pressure applied by the lever-type pressurizing component 21 to the specimen in the sealed bearing mechanism 3. The lever-type pressurizing component 21 includes a lever part and a weight part. The lever part is hinged to the specimen loading component 22, and the weight part is movably connected to a position of the lever part away from the specimen loading component 22; The weight stabilizing mechanism 4 is connected to the support mechanism 1. The weight stabilizing mechanism 4 is arranged directly below the weight part, and the weight stabilizing mechanism 4 is used to limit the central axis of the weight part to be always perpendicular to the horizontal plane.

[0020] It should be noted that when performing a compression deformation test on the specimen, first evacuate and saturate the specimen or treat it by the capillary saturation method. Then, sleeve the treated specimen with a sealing sleeve and place it in the sealed bearing mechanism 3. The specimen is in a limited state in the sealed bearing mechanism 3. The specimen loading component 22 can only apply pressure from one end of the specimen, and the other positions of the specimen are in a restricted state. Then, introduce a set amount of liquid into the sealed bearing mechanism 3, then seal the sealed bearing mechanism 3, and then adjust the weight of the weight part to a set value. After a set time, record the volume change data in the sealed bearing mechanism 3. Then, limit and clamp the weight part through the weight stabilizing mechanism 4 to make the weight part in a stable state. Then, increase the weight of the weight part and release the restriction of the weight stabilizing mechanism 4 on the weight part, so that the weight part can always be in a stable loading state, preventing situations such as shaking, up and down fluctuations, and overpressure of the weight part caused by human operation. Therefore, data fluctuations and errors caused by human operation can be effectively eliminated, making the entire loading deformation data more stable and accurate.

[0021] In an alternative embodiment, as Figure 1 、 Figure 2 and Figure 4 shown, the support mechanism 1 includes a support table 101, a hollow guide tube 102 connected to the middle position of the support table 101, and an annular connection table 103 connected to the upper end of the hollow guide tube 102. The lever part is connected to the annular connection table 103, and the specimen loading component 22 is slidably connected to the annular connection table 103.

[0022] The lever part includes a hinge frame 2101 connected to the annular connection platform 103, a lever 2102 hinged to the hinge frame 2101, and a limit frame 2104 connected to the annular connection platform 103. The limit frame 2104 and the hinge frame 2101 are symmetrically arranged on the annular connection platform 103. A slideway for cooperating with the specimen loading assembly 22 is provided on the lever 2102.

[0023] The weight part includes a weight loading platform 2103 and a number of weight blocks detachably connected to the weight loading platform 2103. The weight loading platform 2103 is movably connected to the lever 2102.

[0024] The specimen loading assembly 22 includes a pressure transmission frame 2201 slidably connected to the lever 2102, a limit rod 2204 and a pressure application rod 2202 connected to the pressure transmission frame 2201, and a dial indicator 2203 connected between the pressure transmission frame 2201 and the sealed bearing mechanism 3. The dial indicator 2203 is used to obtain the distance change data between the pressure transmission frame 2201 and the upper end of the sealed bearing mechanism 3. The limit rod 2204 is slidably connected to the annular connection platform 103, and the pressure application rod 2202 and the limit rod 2204 are coaxially arranged.

[0025] It should be noted that as described above, after the specimen is limited in the sealed bearing mechanism 3 and a set amount of solution is injected into the sealed bearing mechanism 3, the weight of the weight part is changed. Specifically, after the weight loading platform 2103 is clamped by the weight stabilizing mechanism 4, the weight loading platform 2103 is in a stable state at this time. Then, weight blocks of a set weight are installed on the weight loading platform 2103. Then, the weight stabilizing mechanism 4 releases the clamping of the weight loading platform 2103. The weight loading platform 2103 starts to bear the pressure of the weight blocks in the original stable state and starts to transfer the pressure to the hinge frame 2101. The hinge frame 2101 transfers the pressure to the pressure application rod 2202 and the dial indicator 2203. The part of the pressure application rod 2202 that penetrates into the sealed bearing mechanism 3 transfers the pressure to the compression end of the specimen, thereby starting the uniaxial compression deformation test of the specimen. As the specimen deforms, the pressure application rod 2202 starts to move downward, and drives the pressure application rod 2202 to move downward. Thus, the axial strain data of the specimen can be obtained through the dial indicator 2203. When the pressure transmission frame 2201 moves downward, it drives the limit rod 2204 to move downward. The weight loading platform 2103 can move synchronously with the downward movement of the hinge frame 2101 and always conduct the pressure to the hinge frame 2101 until, under the current pressure state, after the specimen has no change, if there is no data change in the dial indicator 2203 within the set time, the application process of the next pressure value can be started.

[0026] In an alternative embodiment, as Figure 1 and Figure 2As shown in the figure, the sealed bearing mechanism 3 includes an outer cylinder 301, an inner cylinder 303 connected to the bottom of the outer cylinder 301, a cover 302 detachably connected to the upper opening of the outer cylinder 301, a first permeable stone 304 and a second permeable stone 305 disposed inside the inner cylinder 303, a water inlet pipe 306, a first drain pipe 307 and a second drain pipe 308 connected to the bottom of the outer cylinder 301, a water measuring cylinder 309 connected to the outer wall of the outer cylinder 301, and a conduit 310 connected between the outer cylinder 301 and the cover 302. The internal space of the water measuring cylinder 309 is communicated with the internal space of the outer cylinder 301 through the conduit 310. Both the water inlet pipe 306 and the first drain pipe 307 are communicated with the space between the outer cylinder 301 and the first permeable stone 304. The second drain pipe 308 is communicated with the internal space of the first permeable stone 304. A first perforation for the pressure rod 2202 to pass through is provided in the middle of the cover 302, and a seal matching the pressure rod 2202 is provided at the first perforation.

[0027] It should be noted that, as described above, when processing the specimen, the first permeable stone 304 and the second permeable stone 305 can be soaked in the solution synchronously until the first permeable stone 304 and the second permeable stone 305 are in a saturated state. Then, the first permeable stone 304 is first placed in the inner cylinder 303. There is a structural member on the inner wall of the inner cylinder 303 to restrict the downward movement of the first permeable stone 304. Then, the specimen is placed on the first permeable stone 304, and the second permeable stone 305 is pressed on the specimen. Subsequently, the cover 302 is used to seal the upper opening end of the outer cylinder 301. The pressure rod 2202 passes through the cover 302 and contacts the second permeable stone 305. At this time, liquid is introduced into the outer cylinder 301 through the water inlet pipe 306 until the liquid flows into the water measuring cylinder 309 from the conduit 310 and the liquid level in the water measuring cylinder 309 reaches the set height. Then, the water inlet pipe 306 is closed, and then the pressure loading can be started. The volume change data of the specimen can be obtained from the change of the liquid level in the water measuring cylinder 309.

[0028] In an alternative embodiment, as Figure 1 、 Figure 4 、 Figure 5 and Figure 6 shown, the weight stabilizing mechanism 4 includes a position adjusting component 41 and a clamping component 42 connected to the position adjusting component 41. The position adjusting component 41 is used to drive the central axis of the clamping component 42 to be coaxial with the central axis of the weight part. The clamping component 42 is used to clamp the weight part.

[0029] The position adjustment assembly 41 includes a linear drive assembly 4101, a sliding plate 4102 slidably connected to the linear drive assembly 4101, an integrated motor 4103 fixedly connected to the sliding plate 4102, a telescopic rod 4105, a screw rod 4104 movably connected to the sliding plate 4102, and a gear transmission group disposed inside the sliding plate 4102. The integrated motor 4103 drives the screw rod 4104 to rotate through the gear transmission group. The other end of the telescopic rod 4105 is fixedly connected to the clamping assembly 42. The screw rod 4104 is threadedly connected to the clamping assembly 42. The screw rod 4104 and the telescopic rod 4105 are symmetrically arranged.

[0030] The clamping assembly 42 includes a housing 4201, a housing 4202 detachably connected to the housing 4201, a pinion gear 4207 movably connected to the housing 4201, an integrated motor 4203 fixedly connected to the outer wall of the housing 4201, a bevel gear 4204 disposed between the housing 4201 and the housing 4202, a plurality of chutes 4205 disposed on the housing 4202, and clamping blocks 4206 disposed in the chutes 4205. The bevel gear 4204 is provided with a flat spiral thread, and the clamping blocks 4206 are provided with arc-shaped threads that cooperate with the flat spiral thread. The output shaft end of the integrated motor 4203 is connected to the pinion gear 4207, and the pinion gear 4207 meshes with the bevel gear 4204.

[0031] It should be noted that as described above, when clamping the weight loading platform 2103, the downward movement distance of the hinge bracket 2101 is obtained through the dial indicator 2203, so that the three-dimensional coordinates of the weight loading platform 2103 at this time can be calculated. Then, the linear drive assembly 4101 is used to control the sliding plate 4102 to move to a position coaxial with the housing 4201 and the weight loading platform 2103. Then, the integrated motor 4103 is used to drive the screw rod 4104 to rotate. The housing 4202 and the telescopic rod 4105 are fixedly connected, and the housing 4202 and the telescopic rod 4105 are threadedly connected. At this time, when the screw rod 4104 rotates, it can drive the housing 4202 and the housing 4201 to move synchronously towards the weight loading platform 2103. When the housing 4202 moves, it drives a plurality of clamping blocks 4206 to move synchronously until the clamping blocks 4206 move to a position that matches the weight loading platform 2103. At this time, the integrated motor 4203 is used to drive the pinion gear 4207 to rotate. When the pinion gear 4207 rotates, it can drive the bevel gear 4204 to rotate in a set direction. When the bevel gear 4204 rotates, it can drive the clamping blocks 4206 to move towards the center of the housing 4202 through the flat spiral thread, so that the plurality of clamping blocks 4206 can stably clamp the weight loading platform 2103, so that the weight loading platform 2103 will not shake when loading the weight blocks, so that the test process can always be in a stable loading state.

[0032] In an alternative embodiment, as Figures 1 to 3 shown, an adjustable backpressure mechanism 5 is connected to the outer wall of the outer cylinder body 301. The adjustable backpressure mechanism 5 is used to drive the liquid in the water measuring cylinder 309 to flow back into the outer cylinder body 301; The adjustable backpressure mechanism 5 includes a fitting connected to the outer wall of the outer cylinder body 301, a second telescopic rod 501 connected to the fitting, a fixing ring 502 connected to the other end of the second telescopic rod 501, a rotating plate 503 movably connected to the fixing ring 502, a second perforation provided in the middle of the fixing ring 502, a screw hole and a first vent hole 507 provided in the middle of the rotating plate 503, a first plastic sheet 508 connected to the inner wall of the screw hole, a corrugated pipe 504 and a spring 505 fixedly connected to the rotating plate 503, a pressure application plate 506 fixedly connected to the other end of the spring 505, a second vent hole 509 provided at the middle position of the pressure application plate 506, and a second plastic sheet 510 connected to the lower end surface of the second vent hole 509. Both the first plastic sheet 508 and the second plastic sheet 510 are fixedly connected to the inner wall of the screw hole and the pressure application plate 506 at only one end, and the first plastic sheet 508 and the second plastic sheet 510 respectively cover the first vent hole 507 and the second vent hole 509.

[0033] It should be noted that, as described above, during the loading test, the adjustable backpressure mechanism 5 and the water measuring cylinder 309 are in a separated state, which will not affect the connection of the other end of the water measuring cylinder 309 to the outside. However, when the liquid in the outer cylinder 301 and the inner cylinder 303 needs to be drained after the experiment, the liquid in the water measuring cylinder 309 cannot flow back into the outer cylinder 301. As a result, when injecting liquid next time, the remaining liquid in the water measuring cylinder 309 will spray out from the opening of the water measuring cylinder 309. Therefore, when draining the liquid, the adjustable backpressure mechanism 5 can be pressed down so that one end of the water measuring cylinder 309 passes through the second perforation on the fixed ring 502 until the screw hole on the rotating plate 503 contacts the water measuring cylinder 309. At this time, the rotating plate 503 can be rotated so that the rotating plate 503 is engaged with the thread provided on the outer wall of the water measuring cylinder 309, thereby stably thread-connecting the rotating plate 503 to the water measuring cylinder 309. At this time, the open end of the water measuring cylinder 309 is blocked. At this time, when the pressure application plate 506 is pressed, the corrugated pipe 504 and the spring 505 are compressed, and a positive pressure is formed in the space between the rotating plate 503, the corrugated pipe 504 and the pressure application plate 506. When this positive pressure acts on the second plastic sheet 510, the second plastic sheet 510 can tightly cover the second ventilation hole 509. When it acts on the first plastic sheet 508, it will drive the first plastic sheet 508 to bend towards the inside of the water measuring cylinder 309, so that the air in the space between the rotating plate 503, the corrugated pipe 504 and the pressure application plate 506 is squeezed into the water measuring cylinder 309, thereby squeezing the liquid in the water measuring cylinder 309 into the outer cylinder 301 through air pressure. When the pressure application plate 506 is released, the space between the rotating plate 503, the corrugated pipe 504 and the pressure application plate 506 becomes larger, thus generating a negative pressure. When this negative pressure acts on the first plastic sheet 508, the first plastic sheet 508 tightly covers the first ventilation hole 507 to block the water measuring cylinder 309. When it acts on the second plastic sheet 510, the second plastic sheet 510 bends towards the inside of the corrugated pipe 504, so that the second ventilation hole 509 is in a conducting state. At this time, the external air can be drawn into the space between the rotating plate 503, the corrugated pipe 504 and the pressure application plate 506, thereby providing a gas source for the next extrusion. Repeating this process can continuously pump the remaining liquid in the water measuring cylinder 309 into the outer cylinder 301.

[0034] The above describes the present embodiment, but the present embodiment is not limited to the above specific implementation manners. The above specific implementation manners are merely illustrative rather than restrictive. Under the inspiration of the present embodiment, those of ordinary skill in the art can also make many forms, all of which fall within the protection scope of the present embodiment.

Claims

1. A lever-type uniaxial compression deformation test device for hard soil, characterized in that, Comprising: A support mechanism (1), on which a sealed bearing mechanism (3) and a lever-type hydrostatic pressure mechanism (2) are fixedly arranged. The sealed bearing mechanism (3) is used to form a sealed environment outside the specimen, and the lever-type hydrostatic pressure mechanism (2) is used to apply a set pressure to the specimen in the sealed bearing mechanism (3); The lever-type hydrostatic pressure mechanism (2) includes a lever-type pressurizing assembly (21) connected to the support mechanism (1) and a specimen loading assembly (22) slidably connected to the support mechanism (1). The lever-type pressurizing assembly (21) is used to apply a set pressure to the specimen loading assembly (22), and the specimen loading assembly (22) is used to transfer the pressure applied by the lever-type pressurizing assembly (21) to the specimen in the sealed bearing mechanism (3). The lever-type pressurizing assembly (21) includes a lever part and a weight part. The lever part is hinged to the specimen loading assembly (22), and the weight part is movably connected to a position of the lever part far from the specimen loading assembly (22); A weight stabilizing mechanism (4), which is connected to the support mechanism (1), is arranged directly below the weight part, and is used to limit the central axis of the weight part to be always perpendicular to the horizontal plane.

2. The uniaxial compression deformation test device for hard soil of a lever type according to claim 1, wherein, The support mechanism (1) includes a support table (101), a hollow guide tube (102) connected to the middle position of the support table (101), and an annular connection table (103) connected to the upper end of the hollow guide tube (102). The lever part is connected to the annular connection table (103), and the specimen loading assembly (22) is slidably connected to the annular connection table (103).

3. The uniaxial compression deformation test device for hard soil of a lever type according to claim 2, characterized in that, The lever part includes a hinge frame (2101) connected to the annular connection table (103), a lever (2102) hinged to the hinge frame (2101), and a limit frame (2104) connected to the annular connection table (103). The limit frame (2104) and the hinge frame (2101) are symmetrically arranged on the annular connection table (103), and the lever (2102) is provided with a slideway for cooperating with the specimen loading assembly (22).

4. A uniaxial compression deformation test device for hard soil with a lever type, characterized in that, The weight part includes a weight loading table (2103) and a plurality of weight blocks detachably connected to the weight loading table (2103), and the weight loading table (2103) is movably connected to the lever (2102).

5. The uniaxial compression deformation test device for hard soil of a lever type according to claim 4, characterized in that, The specimen loading assembly (22) includes a pressure transmission frame (2201) slidably connected to the lever (2102), a limit rod (2204) and a pressure rod (2202) connected to the pressure transmission frame (2201), and a dial indicator (2203) connected between the pressure transmission frame (2201) and the sealed bearing mechanism (3). The dial indicator (2203) is used to obtain the distance change data between the pressure transmission frame (2201) and the upper end of the sealed bearing mechanism (3). The limit rod (2204) is slidably connected to the annular connection table (103), and the pressure rod (2202) and the limit rod (2204) are coaxially arranged.

6. The uniaxial compression deformation test device for hard soil of a lever type according to claim 5, characterized in that, The sealed bearing mechanism (3) includes an outer cylinder (301), an inner cylinder (303) connected to the bottom of the outer cylinder (301), a cover (302) detachably connected to the upper opening of the outer cylinder (301), a first permeable stone (304) and a second permeable stone (305) arranged inside the inner cylinder (303), a water inlet pipe (306), a first drain pipe (307) and a second drain pipe (308) connected to the bottom of the outer cylinder (301), a water measuring cylinder (309) connected to the outer wall of the outer cylinder (301), and a conduit (310) connected between the outer cylinder (301) and the cover (302). The internal space of the water measuring cylinder (309) is communicated with the internal space of the outer cylinder (301) through the conduit (310). The water inlet pipe (306) and the first drain pipe (307) are both communicated with the space between the outer cylinder (301) and the first permeable stone (304). The second drain pipe (308) is communicated with the internal space of the first permeable stone (304). A first perforation for the pressure rod (2202) to pass through is provided in the middle of the cover (302), and a seal matching the pressure rod (2202) is provided at the first perforation.

7. A uniaxial compression deformation test device for hard soil with a lever type, characterized in that, The weight stabilizing mechanism (4) includes a position adjusting component (41) and a clamping component (42) connected to the position adjusting component (41). The position adjusting component (41) is used to drive the central axis of the clamping component (42) to be coaxial with the central axis of the weight part. The clamping component (42) is used to clamp the weight part.

8. A lever-type uniaxial compression deformation test device for hard soil according to claim 7, characterized in that, The position adjusting component (41) includes a linear driving component (4101), a sliding plate (4102) slidably connected to the linear driving component (4101), an integrated motor one (4103) and a first telescopic rod (4105) fixedly connected to the sliding plate (4102), a screw rod (4104) movably connected to the sliding plate (4102), and a gear transmission group arranged inside the sliding plate (4102). The integrated motor one (4103) drives the screw rod (4104) to rotate through the gear transmission group. The other end of the first telescopic rod (4105) is fixedly connected to the clamping component (42). The screw rod (4104) is threadedly connected to the clamping component (42). The screw rod (4104) and the first telescopic rod (4105) are symmetrically arranged.

9. A lever-type uniaxial compression deformation test device for hard soil according to claim 8, characterized in that, The clamping assembly (42) includes a first housing (4201), a second housing (4202) detachably connected to the first housing (4201), a pinion gear (4207) movably connected to the first housing (4201), an integrated motor two (4203) fixedly connected to the outer wall of the first housing (4201), a large bevel gear (4204) disposed between the first housing (4201) and the second housing (4202), a plurality of sliding grooves (4205) disposed on the second housing (4202), and clamping blocks (4206) disposed in the sliding grooves (4205). The large bevel gear (4204) is provided with a flat spiral thread, and the clamping blocks (4206) are provided with arc-shaped threads matching the flat spiral thread. The output shaft end of the integrated motor two (4203) is connected to the pinion gear (4207), and the pinion gear (4207) meshes with the large bevel gear (4204).

10. A uniaxial compression deformation test device for hard soil with a lever type, characterized in that, An adjustable backpressure mechanism (5) is connected to the outer wall of the outer cylinder (301). The adjustable backpressure mechanism (5) is used to drive the liquid in the water measuring cylinder (309) to flow back into the outer cylinder (301). The adjustable backpressure mechanism (5) includes a fitting connected to the outer wall of the outer cylinder (301), a second telescopic rod (501) connected to the fitting, a fixed ring (502) connected to the other end of the second telescopic rod (501), a rotating plate (503) movably connected to the fixed ring (502), a second through hole disposed in the middle of the fixed ring (502), a threaded hole and a first ventilation hole (507) disposed in the middle of the rotating plate (503), a first plastic sheet (508) connected to the inner wall of the threaded hole, a bellows (504) and a spring (505) fixedly connected to the rotating plate (503), a pressure applying plate (506) fixedly connected to the other end of the spring (505), a second ventilation hole (509) disposed at the middle position of the pressure applying plate (506), and a second plastic sheet (510) connected to the lower end surface of the second ventilation hole (509). Only one end of each of the first plastic sheet (508) and the second plastic sheet (510) is fixedly connected to the inner wall of the threaded hole and the pressure applying plate (506). The first plastic sheet (508) and the second plastic sheet (510) respectively cover the first ventilation hole (507) and the second ventilation hole (509).

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