A test device for the disintegration characteristics of expansive mudstone

Abstract

The present invention relates to the field of disintegration testing technology, specifically a device for testing the disintegration characteristics of expansive mudstone, comprising a flat plate, a turntable rotatably connected to the top of the flat plate, a test box mounted on the turntable, an opening on one side of the test box, a plurality of water inlet holes on the other side of the test box, the test box filled with expansive mudstone, an optical fiber sensor embedded in the expansive mudstone, a water injection device mounted on the top side of the turntable, the water injection device injecting water into the expansive mudstone through the water inlet holes, a bracket mounted on the flat plate, a pressure device slidably connected to the bracket. The present invention has the following beneficial effects: the sedimentation and disintegration performance of the expansive mudstone can be tested, and the water injection position of the expansive mudstone can be changed, thereby testing the influence of moisture at different positions on the disintegration characteristics of the expansive mudstone. At the same time, the opening on one side of the test box is provided, so that there is no restrictive force on the expansive mudstone at this location. After applying a thrust in this direction to the expansive mudstone, the unilateral disintegration of the expansive mudstone can be tested.

Description

Technical Field

[0001] The invention relates to the technical field of disintegration characteristic testing, in particular to a device for testing the disintegration characteristics of expansive mudstone. Background Art

[0002] Expansive mudstone, also known as soft rock, is a type of rock with low mechanical strength that softens easily in contact with water and easily compresses and deforms under external loads. It exhibits certain expansive, disintegrating, and wetting deformation properties. To reduce transportation costs and minimize damage to the surrounding environment, mountain highways often use locally sourced materials and excavated soil as the primary roadbed fill material.

[0003] Under years of repeated traffic loads and natural environmental conditions, most of these highway subgrades are affected by dynamic loads and moisture, resulting in serious road disease problems such as uneven subgrade settlement, slope instability and landslides.

[0004] Existing soil wetting deformation testing equipment (CN201820811032.3: An airtight pre-disintegrated mudstone wetting deformation testing device) surrounds the mudstone with a tubular inner tube. Because the lateral force of the disintegration is limited by the inner tube, it can only study the wetting subsidence of the local mudstone. Disasters such as mudstone disintegration spreading to the surrounding areas (such as landslides) cannot be studied and tested. Summary of the Invention

[0005] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a device for testing the disintegration characteristics of expansive mudstone.

[0006] In order to achieve the above objects, the technical solution adopted by the present invention is:

[0007] A device for testing the disintegration characteristics of expansive mudstone includes a flat plate, the upper side of which is rotatably connected to a turntable, the turntable being equipped with a test box, one side of which is open, and the other side of which is equipped with multiple water inlet holes, the test box being filled with expansive mudstone, and an optical fiber sensor being buried in the expansive mudstone, a water injection device being installed on the upper side of the turntable, and the water injection device injecting water into the expansive mudstone through the water inlet holes, a bracket being installed on the flat plate, and a pressure device being slidably connected to the bracket.

[0008] Preferably, the water injection device includes a first slider, which slides on the upper side of the turntable, the upper side of the first slider is fixedly connected to the vertical plate, one side of the vertical plate is slidably connected to the second slider, one side of the second slider is slidably connected to the water injection pipe, a retaining ring is sleeved on the water injection pipe, a first spring is fixedly connected between the retaining ring and the second slider, and one end of the water injection pipe is connected to the sealing box.

[0009] Preferably, the pressure-applying device includes a third slider, which is slidably connected to the bracket, one side of the third slider is slidably connected to the vertical rod, and the lower end of the vertical rod is fixedly connected to the pressure-applying contact device.

[0010] Preferably, a baffle is fixedly connected to the vertical pole, a second spring is fixedly connected between the baffle and the third slider, a touch rod is detachably connected to one side of the vertical pole, and a plurality of touch blocks are fixedly connected to the bracket, the touch blocks are triangular blocks, and the touch rod can contact the touch blocks during translation.

[0011] Preferably, the upper end of the vertical pole is detachably connected to the counterweight.

[0012] Preferably, the pressure contact device comprises a base plate, the lower side of the base plate is rotatably connected to two rotating shafts, and the rotating shafts are in contact with the upper surface of the expansive mudstone.

[0013] Preferably, a straight circular groove is provided on the upper side of the substrate, a slide seat is slidably connected in the straight circular groove, a third spring is fixedly connected between one end of the straight circular groove and the slide seat, a sliding hole is provided at the bottom of the slide seat, a sliding rod is slidably connected in the sliding hole, the lower end of the sliding rod is fixedly connected to the pressure plate, an elastic part is installed in the sliding hole, one side of the sliding rod is fixedly connected to the resistance block, the lower side of the substrate is fixedly connected to the resistance plate, and the side opposite to the resistance block of the resistance plate is an inclined surface.

[0014] Preferably, one side of the abutment plate is fixedly connected to the support plate.

[0015] Preferably, the elastic member includes a transition plate, which slides in the sliding hole. One end of the transition plate is fixedly connected to the fourth spring, and the other end of the fourth spring is fixed to the sliding rod. An adjusting threaded hole is provided on the sliding seat, and an adjusting screw is threadedly connected to the adjusting threaded hole.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The device for testing the disintegration characteristics of expansive mudstone provided by the present invention can not only test the settlement and disintegration performance of expansive mudstone, but also change the water injection position of the expansive mudstone, thereby testing the influence of moisture at different positions on the disintegration characteristics of the expansive mudstone. At the same time, an opening is set on one side of the test box, so that there is no restrictive force on the expansive mudstone here. After applying a thrust in this direction to the expansive mudstone, the unilateral disintegration of the expansive mudstone can be tested. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the present invention;

[0019] Figure 2 It is a structural schematic diagram of the pressure-applying device of the present invention;

[0020] Figure 3 It is a schematic structural diagram of the pressure contact device of the present invention;

[0021] Figure 4 For the present invention Figure 3 sectional view of

[0022] Figure 5 For the present invention Figure 4 A magnified view of point A;

[0023] Figure 6 It is a structural schematic diagram of the water injection device of the present invention;

[0024] Figure 7 For the present invention Figure 1 Another direction diagram.

[0025] In the figure: plate 1; turntable 2; first chute 21; water injection device 3; first slider 31; vertical plate 32; second chute 33; second slider 34; water injection pipe 35; retaining ring 36; first spring 37; sealing box 38; screw 39; test box 4; water inlet hole 41; expansive mudstone 42; optical fiber sensor 43; bracket 5; pressure device 6; third slider 61; vertical rod 62; baffle 63; second spring 64; touch rod 65; pressure contact device 7; base plate 70; rotating shaft 71; straight circular groove 72; slide seat 73; slide rod 74; pressure plate 75; third spring 76; adjusting screw 77; transition plate 78; fourth spring 79; contact plate 710; contact block 711; support plate 712. DETAILED DESCRIPTION

[0026] The following description is intended to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are merely examples, and those skilled in the art may conceive of other obvious variations.

[0027] like Figure 1-Figure 4 The device shown is a test device for the disintegration characteristics of expansive mudstone, comprising a flat plate 1, a rotating groove being provided on the upper side of the flat plate 1, a turntable 2 being connected and rotating in the rotating groove, and a power device being installed on the flat plate 1 for driving the turntable 2 to rotate clockwise or counterclockwise in the rotating groove. The power device is prior art and will not be described in detail here, and is not shown in the figure.

[0028] A test box 4 is mounted on the turntable 2. The top of the test box 4 is hollowed out. An opening 40 is provided on one side of the test box 4. A plurality of water inlet holes 41 are provided on the other side of the test box 4 opposite to the opening 40. The test box 4 is filled with expansive mudstone 42. An optical fiber sensor 43 is also buried in the expansive mudstone. The expansive mudstone 42 is used for testing. A water injection device 3 is mounted on the upper side of the turntable 2. The water injection device 3 injects water into the expansive mudstone 42 through the water inlet hole 41. The water injection device 3 includes a first slider 31. A first chute 21 is provided on the turntable 2. The first slider 31 reciprocates in the first chute 21. Sliding, the upper side of the first slider 31 is fixedly connected to the vertical plate 32, and a second slide groove 33 is provided on one side of the vertical plate 32. The second slide groove 33 is slidingly connected to the second slider 34. The top of the vertical plate 32 is threadedly connected to the screw 39, and the lower end of the screw 39 is rotatably connected to the second slider 34. Rotating the screw 39 clockwise or counterclockwise can make the second slider 34 move up and down. One side of the second slider 34 is slidably connected to the water injection pipe 35, and a retaining ring 36 is sleeved on the water injection pipe 35. The first spring 37 is fixedly connected between the retaining ring 36 and the second slider 34, and one end of the water injection pipe 35 is connected to the sealing box 38. When water needs to be injected into the expansive mudstone 42, the sealing box 38 is brought into contact with one side of the test box 4, and water can be injected into the expansive mudstone 42 through the water inlet hole 41. By changing the specific position of the first slider 31 in the first chute 21 and the position of the second slider 34 in the second chute 33, the specific position of the sealing box 38 can be changed. In this way, water injection tests can be performed at different positions of the test box 4, thereby testing the disintegration characteristics of the expansive mudstone 42 after water injection at different positions.

[0029] The flat panel 1 is mounted with a support 5, which is a gantry-type support. A pressure-applying device 6 is slidably connected to the support 5. The pressure-applying device 6 includes a third slider 61, which slides within a third slot 51 on the support 5. The method for driving the third slider 61 is conventional and will not be described in detail here. One side of the third slider 61 is slidably connected to a vertical rod 62, the upper end of which is detachably connected to a counterweight 66, while the lower end of the vertical rod 62 is fixedly connected to a pressure-applying contact device 7. A baffle 63 is fixedly connected to the vertical rod 62, and a second spring 64 is fixedly connected between the baffle 63 and the third slider 61. A contact rod 65 is detachably connected to one side of the vertical rod 62. Multiple triangular contact blocks 52 are fixedly connected to the support 5, and the contact rods 65 can contact the contact blocks 52 during translation.

[0030] The pressure contact device 7 includes a base plate 70, the lower side of which is rotatably connected to two rotating shafts 71. The rotating shafts 71 contact the upper surface of the expansive mudstone 42. A straight circular groove 72 is provided on the upper side of the base plate 70, into which a slide 73 is slidably connected. A third spring 76 is fixedly connected between one end of the straight circular groove 72 and the slide 73. The bottom of the slide 73 has a sliding hole, into which a slide rod 74 is slidably connected. The lower end of the slide rod 74 is fixedly connected to a pressure plate 75. The sliding hole contains an elastic member. The elastic member includes a transition plate 78, which slides within the sliding hole. One end of the transition plate 78 is fixedly connected to a fourth spring 79, and the other end of the fourth spring 79 is fixed to the slide rod 74. The slide 73 has an adjustment threaded hole, into which an adjustment screw 77 is threaded. One side of the slide rod 74 is fixedly connected to a resistance block 711. The lower side of the base plate 70 is fixedly connected to a resistance plate 710. The sides of the resistance plate 710 opposite the resistance block 711 are both inclined. In order to prevent the abutment plate 710 from being separated from the abutment block 711 , a support plate 712 is fixedly connected to one side of the abutment plate 710 .

[0031] During use, the test box 4 is filled with expansive mudstone 42. Once the expansive mudstone 42 is compacted, the touch rod 65 is removed and the third slider 61 is translated to cause the rotating shaft 71 to roll on the expansive mudstone 42, thereby generating a load on the expansive mudstone 42 and testing the sinking performance of the expansive mudstone 42 under pressure. In this test state, the control dial 2 is rotated alternately clockwise and counterclockwise within the rotation groove, with a rotation angle of 15°. As the dial 2 rotates, the test box 4 and the expansive mudstone 42 also rotate, causing the rotating shaft 71 and the expansive mudstone 42 to generate a lateral torque force, thereby testing the collapse of the expansive mudstone 42 in this state.

[0032] Water is injected into the expansive mudstone 42 through the water inlet 41, and then the third slider 61 is translated to cause the rotating shaft 71 to roll on the expansive mudstone 42, thereby generating a load force on the expansive mudstone 42, thereby testing the sinking performance of the expansive mudstone 42 under pressure in a wet state. The sinking condition can be determined by the optical fiber sensor 43, which is conventional technology and will not be described in detail here. In this test state, the control turntable 2 is rotated alternately clockwise and counterclockwise in the rotating groove, with a rotation angle of 15°. When the turntable 2 rotates, the test box 4 and the expansive mudstone 42 also rotate, causing the rotating shaft 71 and the expansive mudstone 42 to generate a lateral torque force, thereby testing the disintegration of the expansive mudstone 42 in this state. The location of water injection into the expansive mudstone 42 is changed to test the effect of different water injection locations on the disintegration of the expansive mudstone 42.

[0033] The same as the above test process, the above test process does not install the touch rod 65 on the side of the vertical pole 62. After one round of testing, the touch rod 65 is installed on the side of the vertical pole 62. The form of detachable connection between the vertical pole 62 and the touch rod 65 is the existing technology and will not be repeated here. After the touch rod 65 is installed, during the translation of the third slider 61, when the touch rod 65 contacts the touch block 52, the touch rod 65 moves upward along the touch block 52, thereby driving the vertical pole 62 to move upward. When the touch rod 65 passes over the touch block 52, under the action of gravity and the elastic force of the second spring 64, the vertical pole 62 moves downward rapidly, thereby generating a downward instantaneous impact force on the expansive mudstone 42. Under this impact force, the rotating shaft 71 will extend downward into the expansive mudstone 42. After the rotating shaft 71 extends into the expansive mudstone 42, the pressure plate 75 will contact the expansive mudstone 42. As the rotating shaft 71 continues to extend downward, due to the large force-bearing area of the pressure plate 75, it basically does not extend into the expansive mudstone 42. The pressure plate 75 will cause the slide bar 74 to overcome the elastic force of the elastic member and move upward. During the upward movement of the slide bar 74, the resistance block 711 moves upward. Under the action of the resistance plate 710, the slide seat 73 will translate in the straight circular groove 72, thereby causing the slide bar 74 and the pressure plate 75 to translate as well. The translation force acts on the expansive mudstone 42 through the pressure plate 75, generating a lateral thrust on the expansive mudstone 42, thereby testing the effect of the lateral thrust on the condition of the expansive mudstone 42.

[0034] The basic principles, main features and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only illustrate the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements fall within the scope of the present invention as claimed, and the scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for testing the disintegration characteristics of expansive mudstone, characterized by: The invention comprises a flat plate (1), wherein the upper side of the flat plate (1) is rotatably connected to a turntable (2), a test box (4) is mounted on the turntable (2), an opening (40) is provided on one side of the test box (4), and a plurality of water inlet holes (41) are provided on the other side of the test box (4), the test box (4) is filled with expansive mudstone (42), and an optical fiber sensor (43) is also buried in the expansive mudstone, a water injection device (3) is mounted on the upper side of the turntable (2), and the water injection device (3) injects water into the expansive mudstone (42) through the water inlet holes (41), a bracket (5) is mounted on the flat plate (1), and a pressure device (6) is slidably connected to the bracket (5); The pressure device (6) includes a third slider (61), the third slider (61) is slidably connected to the bracket (5), one side of the third slider (61) is slidably connected to the vertical rod (62), and the lower end of the vertical rod (62) is fixedly connected to the pressure contact device (7); The pressure contact device (7) comprises a base plate (70), the lower side of which is rotatably connected to two rotating shafts (71), and the rotating shafts (71) are in contact with the upper surface of the expansive mudstone (42).

2. The device for testing the disintegration characteristics of expansive mudstone according to claim 1, wherein: The water injection device (3) comprises a first slider (31), the first slider (31) slides on the upper side of the turntable (2), the upper side of the first slider (31) is fixedly connected to the vertical plate (32), one side of the vertical plate (32) is slidably connected to the second slider (34), one side of the second slider (34) is slidably connected to the water injection pipe (35), a retaining ring (36) is sleeved on the water injection pipe (35), a first spring (37) is fixedly connected between the retaining ring (36) and the second slider (34), and one end of the water injection pipe (35) is connected to the sealing box (38).

3. The device for testing the disintegration characteristics of expansive mudstone according to claim 1, wherein: The vertical rod (62) is fixedly connected to a baffle (63), a second spring (64) is fixedly connected between the baffle (63) and the third slider (61), a touch rod (65) is detachably connected to one side of the vertical rod (62), a plurality of touch blocks (52) are fixedly connected to the bracket (5), the touch blocks (52) are triangular blocks, and the touch rod (65) can contact the touch blocks (52) during translation.

4. The device for testing the disintegration characteristics of expansive mudstone according to claim 1, wherein: The upper end of the vertical rod (62) is detachably connected to a counterweight (66).

5. The device for testing the disintegration characteristics of expansive mudstone according to claim 1, wherein: A straight circular groove (72) is provided on the upper side of the base plate (70), and a slide seat (73) is slidably connected in the straight circular groove (72). A third spring (76) is fixedly connected between one end of the straight circular groove (72) and the slide seat (73). A sliding hole is provided at the bottom of the slide seat (73), and a sliding rod (74) is slidably connected in the sliding hole. The lower end of the sliding rod (74) is fixedly connected to the pressure plate (75). An elastic member is installed in the sliding hole. One side of the sliding rod (74) is fixedly connected to the resistance block (711). The lower side of the base plate (70) is fixedly connected to the resistance plate (710), and the sides of the resistance plate (710) opposite to the resistance block (711) are both inclined surfaces.

6. The device for testing the disintegration characteristics of expansive mudstone according to claim 5, wherein: One side of the contact plate (710) is fixedly connected to the supporting plate (712).

7. The device for testing the disintegration characteristics of expansive mudstone according to claim 5, wherein: The elastic member includes a transition plate (78), the transition plate (78) slides in the sliding hole, one end of the transition plate (78) is fixedly connected to the fourth spring (79), the other end of the fourth spring (79) is fixed to the sliding rod (74), and an adjusting threaded hole is provided on the sliding seat (73), and an adjusting screw (77) is threadedly connected to the adjusting threaded hole.

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