A geotechnical dynamic direct shear test device

Abstract

The invention relates to the technical field of direct shear instruments, and discloses a geotechnical dynamic direct shear test device, comprising: a base, a translation mechanism is arranged on the top surface of the base, a moving seat is slidably matched on the translation mechanism, a plurality of shear boxes are arranged in parallel from top to bottom, the shear boxes comprise an upper sample box, a lower sample box and a pressure transmission plate, a positioning mechanism is arranged on the upper sample box, the lowest lower sample box is detachably connected to the moving seat, the lower sample box is also detachably connected to the pressure transmission plate in another shear box, a weight plate is arranged above the plurality of shear boxes through a lifting mechanism, a pressure sensor is arranged on the bottom surface of the weight plate, the pressure sensor is abutted against the highest pressure transmission plate, a support frame is arranged on one side of the translation mechanism, a force measuring mechanism is slidably matched on the support frame, when facing the test of a plurality of soil samples, the invention only needs to install all the soil samples and then test them step by step, and there is no need to frequently change the soil samples in the same shear box, the operation is simple and convenient, and the work efficiency can be effectively improved.

Description

Technical Field

[0001] The invention relates to the technical field of direct shear instruments, in particular to a geotechnical dynamic direct shear test device. Background Art

[0002] In geotechnical tests, three to four identical specimens are generally taken, different vertical pressures are applied to them in a direct shear apparatus for geotechnical tests, and then shear forces are applied to them separately until they are destroyed, in order to directly measure the shear strength of the soil on the fixed shear plane.

[0003] When using the direct shear apparatus, the soil sample needs to be placed in the shear box and subjected to a shear test under vertical pressure. Then, based on the dynamometer readings during the shear process, the shear strength indicators of the soil sample are calculated and determined: internal friction angle and cohesion.

[0004] The existing direct shear apparatus usually has only one shear box, and when performing a shear test, three to four identical soil samples are generally taken and the shear tests are performed under different vertical pressures. Therefore, when the existing direct shear apparatus is actually used, it is necessary to load and unload and replace the soil samples many times, which makes the manual operation cumbersome and inefficient. Summary of the invention

[0005] The object of the present invention is to provide a geotechnical dynamic direct shear test device, aiming to solve or improve at least one of the above-mentioned technical problems.

[0006] To achieve the above object, the present invention provides the following solution: The present invention provides a geotechnical dynamic direct shear test device, comprising:

[0007] A base, wherein a translation mechanism is disposed on the top surface of the base, and a moving seat is slidably matched on the translation mechanism;

[0008] A plurality of shear boxes, wherein the plurality of shear boxes are arranged in parallel from top to bottom, the shear boxes include an upper sample box, a lower sample box and a pressure transmission plate, the upper sample box is provided with a positioning mechanism, the positioning mechanism is detachably connected to the lower sample box and the pressure transmission plate respectively, the lower sample box at the bottom is detachably connected to the movable seat, and the lower sample box is also detachably connected to the pressure transmission plate in another shear box;

[0009] A weight plate, the weight plate is arranged above the plurality of shear boxes through a lifting mechanism, a pressure sensor is arranged on the bottom surface of the weight plate, and the pressure sensor abuts against the uppermost pressure transmission plate;

[0010] A support frame is arranged on one side of the translation mechanism, and a force measuring mechanism is slidably matched on the support frame, and the force measuring mechanism is used to detect the shear stress of the multiple upper sample boxes.

[0011] Optionally, the translation mechanism includes a first motor, a lead screw, a lead screw nut and a pair of optical rods, the first motor, the lead screw and the pair of optical rods are all arranged on the base, the lead screw nut is arranged on the moving seat, and the lead screw nut is threadedly connected to the lead screw, the pair of optical rods pass through the moving seat and slideably cooperate with the moving seat, and the lead screw is connected to the output shaft of the first motor.

[0012] Optionally, the positioning mechanism includes a second motor, which is arranged on the side wall of the upper sample box, the output shaft of the second motor is drivingly connected to a main transmission assembly, the main transmission assembly is drivingly connected to a plurality of auxiliary transmission assemblies, the auxiliary transmission assembly is drivingly connected to a plurality of rotating rods, the lower sample box is provided with a plurality of through holes for accommodating the rotating rods, the rotating rods are rotatably connected in the through holes, the two ends of the rotating rod are respectively facing the pressure transmission plate and the lower sample box, the two ends of the rotating rod are respectively threaded with insert sleeves, the side walls of the insert sleeves are fixedly connected to a plurality of clamping strips, the side walls of the through holes begin to have clamping grooves that slidably cooperate with the clamping strips, the pressure transmission plate and the lower sample box are respectively provided with insert holes that correspond one-to-one and are plugged in with the plurality of insert sleeves.

[0013] Optionally, the auxiliary transmission assembly includes an auxiliary transmission rod, the upper sample box is provided with a groove for accommodating the auxiliary transmission rod, the groove is communicated with the corresponding through hole, the auxiliary transmission rod is rotatably connected in the groove, and one end of the auxiliary transmission rod is transmission-connected to the main transmission assembly, the auxiliary transmission rod is provided with multiple coaxial worm sections, the worm is meshed with a worm wheel, the multiple worm wheels correspond one-to-one to the multiple rotating rods, and the worm wheel is sleeved on the rotating rod.

[0014] Optionally, the main transmission assembly includes a main bevel gear, which is fixedly connected to the output shaft of the second motor, the main bevel gear is meshedly connected to a plurality of first sub-bevel gears, the first sub-bevel gears are fixedly connected to a main transmission rod, the end of the main transmission rod away from the first sub-bevel gear is fixedly connected to the second sub-bevel gear, the second sub-bevel gear is meshedly connected to a third sub-bevel gear, the plurality of third sub-bevel gears correspond one-to-one to the plurality of sub-bevel gears, and the third sub-bevel gear is fixedly connected to the sub-transmission rod.

[0015] Optionally, the side wall of the lower sample box is fixedly connected with a plurality of first connecting plates, the first connecting plates are threadedly connected with first fixing bolts, the pressure transmission plate is fixedly connected with a plurality of second connecting plates, the second connecting plates are provided with first bolt holes, and the plurality of first fixing bolts correspond one-to-one to the plurality of first bolt holes and are threadedly connected.

[0016] Optionally, a plurality of second bolt holes are formed on the movable seat, and the plurality of second bolt holes correspond one-to-one to the plurality of first fixing bolts and are threadedly connected.

[0017] Optionally, the lifting mechanism includes a pair of lifting cylinders, which are fixedly mounted on the base and respectively located on both sides of the movable seat. A support plate is fixedly connected between the output ends of the pair of lifting cylinders, a telescopic rod is fixedly connected to the support plate, and one end of the telescopic rod away from the support plate is fixedly connected to the weight plate.

[0018] Optionally, the force measuring mechanism includes a sliding seat, which is slidably connected to the support frame, and a pair of support rods slide through the sliding seat, a connecting plate is fixedly connected between one end of the pair of support rods close to the movable seat, a force gauge is arranged between the connecting plate and the sliding seat, and a contact rod is fixedly connected to the end face of the connecting plate away from the support rod, and the contact rod is used to abut against the multiple upper sample boxes.

[0019] Optionally, a sliding groove is provided on the support frame, the sliding seat is slidably connected in the sliding groove, two rows of third bolt holes are provided on the sliding groove, a pair of fourth bolt holes is provided on the sliding seat, and the pair of fourth bolt holes are threadedly connected to the two rows of third bolt holes through second fixing bolts.

[0020] The present invention discloses the following technical effects: it is only necessary to use a positioning mechanism in the shear box to be tested to cancel the limit of the upper sample box, the lower sample box and the pressure transmission plate in the shear box, and then place a weight of the pressure required for the test on the weight plate above the pressure transmission plate, and drive the remaining shear boxes and the lower sample box to move synchronously through a translation mechanism, so as to perform a shear test on the soil sample between the upper sample box and the lower sample box, and at the same time obtain data through a force measuring mechanism, and then reset the shear box and reconnect and fix the upper sample box, the lower sample box and the pressure transmission plate through the positioning mechanism, and repeat the above steps to perform the next shear box test, so that when facing multiple soil sample tests, it is only necessary to install all the soil samples and then test them step by step, without frequently changing the soil samples in the same shear box, the operation is simple and convenient, and the work efficiency can be effectively improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings constituting a part of the present application are used to provide a further understanding of the present application. The illustrative embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 An exploded view of the shear box of the present invention;

[0024] Figure 3 for Figure 2 A partial enlarged view of middle A;

[0025] Figure 4 A bottom view of an extruded plate of the present invention;

[0026] Figure 5 It is a schematic structural diagram of the force measuring mechanism of the present invention;

[0027] Figure 6 It is a schematic diagram of the structure of the mobile seat of the present invention.

[0028] In the figure: 1, base; 2, moving seat; 3, upper sample box; 4, lower sample box; 5, pressure transmission plate; 6, weight plate; 7, pressure sensor; 8, support frame; 9, first motor; 10, lead screw; 11, lead screw nut; 12, light rod; 13, second motor; 14, rotating rod; 15, through hole; 16, insert cylinder; 17, clamping strip; 18, clamping slot; 19, plug hole; 20, auxiliary transmission rod; 21, groove; 22, worm; 23, worm wheel; 24, main bevel gear; 25, first auxiliary bevel gear; 26. Main transmission rod; 27. Second secondary bevel gear; 28. Third secondary bevel gear; 29. ​​First connecting plate; 30. First fixing bolt; 31. Second connecting plate; 32. First bolt hole; 33. Second bolt hole; 34. Lifting cylinder; 35. Support plate; 36. Telescopic rod; 37. Sliding seat; 38. Support rod; 39. Connecting plate; 40. Dynamometer; 40. Dynamometer; 41. Contact rod; 42. Slide groove; 43. Third bolt hole; 44. Fourth bolt hole; 45. Second fixing bolt. DETAILED DESCRIPTION

[0029] 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.

[0030] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0031] Reference Figure 1-Figure 6 The present invention provides a geotechnical dynamic direct shear test device, comprising:

[0032] A base 1, a top surface of the base 1 is provided with a translation mechanism, and a moving seat 2 is slidably matched on the translation mechanism;

[0033] A plurality of shear boxes, the plurality of shear boxes are arranged in parallel from top to bottom, the shear boxes include an upper sample box 3, a lower sample box 4 and a pressure transmission plate 5, a positioning mechanism is arranged on the upper sample box 3, the positioning mechanism is detachably connected to the lower sample box 4 and the pressure transmission plate 5 respectively, the lower sample box 4 at the bottom is detachably connected to the movable seat 2, and the lower sample box 4 is also detachably connected to the pressure transmission plate 5 in another shear box;

[0034] A weight plate 6, which is arranged above the plurality of shear boxes through a lifting mechanism, and a pressure sensor 7 is arranged on the bottom surface of the weight plate 6, and the pressure sensor 7 abuts against the uppermost pressure transmission plate 5;

[0035] The support frame 8 is arranged on one side of the translation mechanism. A force measuring mechanism is slidably fitted on the support frame 8 . The force measuring mechanism is used to detect the shear stress of the multiple upper sample boxes 3 .

[0036] By stacking a plurality of shear boxes on the movable seat 2 from bottom to top in sequence, when stacking the shear boxes, a plurality of soil samples to be tested are placed one by one from bottom to top into the plurality of shear boxes, and at the same time, when stacking the shear boxes, the upper sample box 3, the lower sample box 4 and the pressure transmission plate 5 are connected and fixed by the positioning mechanism, and two adjacent shear boxes are connected and fixed. When testing, it is only necessary to cancel the limit of the upper sample box 3, the lower sample box 4 and the pressure transmission plate 5 in the shear box to be tested by the positioning mechanism in the shear box to be tested, and the pressure required for the test can be placed on the weight plate 6 above the pressure transmission plate 5. The weight is used, and the remaining shear boxes and the lower sample box 4 are driven to move synchronously through the translation mechanism, and the soil sample between the upper sample box 3 and the lower sample box 4 is subjected to a shear test. At the same time, data is obtained through the force measuring mechanism, and then the shear box is reset and the upper sample box 3, the lower sample box 4 and the pressure transmission plate 5 are reconnected and fixed through the positioning mechanism, and the above steps can be repeated to carry out the next shear box test. Therefore, when facing multiple soil sample tests, it is only necessary to install all the soil samples and then test them step by step. There is no need to frequently change the soil samples in the same shear box. The operation is simple and convenient, and can effectively improve the work efficiency.

[0037] Furthermore, the upper sample box 3 and the lower sample box 4 are both of outer square and inner circular structure, and the pressure transmission plate 5 has a boss that can be inserted into the inner circular holes of the upper sample box 3 and the lower sample box 4. The boss cooperates with the inner circular hole gap of the upper sample box 3 and the lower sample box 4 and is used to press the soil sample.

[0038] A further optimized solution is that the translation mechanism includes a first motor 9, a lead screw 10, a lead screw nut 11 and a pair of light rods 12. The first motor 9, the lead screw 10 and the pair of light rods 12 are all arranged on the base 1, the lead screw nut 11 is arranged on the moving seat 2, and the lead screw nut 11 is threadedly connected to the lead screw 10, the pair of light rods 12 penetrate the moving seat 2 and slide with the moving seat 2, and the lead screw 10 is connected to the output shaft of the first motor 9.

[0039] By driving the lead screw 10 to rotate through the first motor 9, the lead screw 10 and the lead screw nut 11 can drive the moving seat 2 to slide parallel to the light rod 12, thereby driving the shear box on the moving seat 2 to slide synchronously, forming a horizontal displacement of the shear box.

[0040] A further optimized solution is that the positioning mechanism includes a second motor 13, which is arranged on the side wall of the upper sample box 3. The output shaft of the second motor 13 is transmission-connected with a main transmission assembly, which is transmission-connected with multiple auxiliary transmission assemblies, and the auxiliary transmission assembly is transmission-connected with multiple rotating rods 14. The lower sample box 4 is provided with multiple through holes 15 for accommodating the rotating rods. The rotating rod 14 is rotationally connected in the through holes 15. The two ends of the rotating rod 14 are respectively facing the pressure transmission plate 5 and the lower sample box 4. The two ends of the rotating rod 14 are respectively threaded with inserts 16, and the side walls of the inserts 16 are fixedly connected with multiple clamping strips 17. The side walls of the through holes 15 begin to have clamping grooves 18 that slide with the clamping strips 17. The pressure transmission plate 5 and the lower sample box 4 are respectively provided with plug holes 19 that correspond to and are plugged into the multiple plug tubes 16 one by one.

[0041] A further optimized solution is that the auxiliary transmission assembly includes an auxiliary transmission rod 20, and a groove 21 for accommodating the auxiliary transmission rod 20 is opened on the upper sample box 3, the groove 21 is communicated with the corresponding through hole 15, the auxiliary transmission rod 20 is rotatably connected in the groove 21, and one end of the auxiliary transmission rod 20 is transmission-connected to the main transmission assembly, and a plurality of coaxial worms 22 are arranged on the auxiliary transmission rod 20, and the worm 22 is meshed with a worm wheel 23, and the plurality of worm wheels 23 correspond one-to-one to the plurality of rotating rods 14, and the worm wheel 23 is sleeved on the rotating rod 14.

[0042] A further optimized solution is that the main transmission assembly includes a main bevel gear 24, which is fixedly connected to the output shaft of the second motor 13, and the main bevel gear 24 is meshedly connected to multiple first sub-bevel gears 25, and the first sub-bevel gears 25 are fixedly connected to the main transmission rod 26, and the end of the main transmission rod 26 away from the first sub-bevel gear 25 is fixedly connected to the second sub-bevel gear 27, and the second sub-bevel gear 27 is meshedly connected to the third sub-bevel gear 28, and the multiple third sub-bevel gears 28 correspond one-to-one to the multiple sub-transmission rods 20, and the third sub-bevel gear 28 is fixedly connected to the sub-transmission rod 20.

[0043] The main bevel gear 24 is driven to rotate by the second motor 13, and the main bevel gear 24 drives multiple first sub-bevel gears 25 to rotate, so that the main transmission rod 26 rotates, and then the third sub-bevel gear 28 and the sub-transmission rod 20 are driven to rotate by the second sub-bevel gear 27, and then the worm gear 23 is driven to rotate by the worm 22 on the sub-transmission rod 20, so that the rotating rod 14 rotates. When the rotating rod 14 rotates, the insert tube 16 can be displaced through the limiting cooperation between the card strip 17 and the card slot 18, and the thread cooperation between the insert tube 16 and the rotating rod 14, so that the insert tube 16 at both ends of the rotating rod 14 are respectively inserted into the pressure transmission plate 5 and the lower sample box 4 plug hole 19 plug hole, so that the upper sample box 3, the lower sample box 4 and the pressure transmission plate 5 form an overall displacement in the horizontal direction. In this way, when a single shear box is sheared, the lower sample box 4 of the shear box and the shear box connected thereto can be moved synchronously.

[0044] Furthermore, the insert tube 16 is inserted into the insertion hole 19 on the pressure transmission plate 5 and abuts against the insertion hole 19 to support the pressure transmission plate 5, thereby preventing the soil sample in the shear box from being subjected to stress during the test.

[0045] A further optimized solution is that a plurality of first connecting plates 29 are fixedly connected to the side wall of the lower sample box 4, and a first fixing bolt 30 is threadedly connected to the first connecting plate 29; a plurality of second connecting plates 31 are fixedly connected to the pressure transmission plate 5, and a first bolt hole 32 is opened on the second connecting plate 31; the plurality of first fixing bolts 30 correspond one-to-one to the plurality of first bolt holes 32 and are threadedly connected.

[0046] The first fixing bolt 30 is threadedly connected to the first bolt hole 32 , so that the first connecting plate 29 is connected and fixed to the second connecting plate 31 , thereby connecting and fixing the pressure transmission plate 5 to the lower sample box 4 above it.

[0047] According to a further optimized solution, a plurality of second bolt holes 33 are provided on the movable seat 2 , and the plurality of second bolt holes 33 correspond one-to-one to the plurality of first fixing bolts 30 and are threadedly connected.

[0048] The lower sample box 4 at the bottom can be connected and fixed to the movable seat 2 by threading the first fixing bolt 30 with the second bolt hole 33 .

[0049] A further optimized solution is that the lifting mechanism includes a pair of lifting cylinders 34, which are fixedly mounted on the base 1. The pair of lifting cylinders 34 are respectively located on both sides of the movable seat 2. A support plate 35 is fixedly connected between the output ends of the pair of lifting cylinders 34. A telescopic rod 36 is fixedly connected to the support plate 35. The end of the telescopic rod 36 away from the support plate 35 is fixedly connected to the weight plate 6.

[0050] By raising the cylinder 34 to adjust the height of the telescopic rod 36 , the space between the telescopic rod 36 and the movable seat 2 can be increased, so that a plurality of shear boxes can be placed according to the test requirements.

[0051] A further optimized solution is that the force measuring mechanism includes a sliding seat 37, which is slidably connected to the support frame 8, and a pair of support rods 38 slide through the sliding seat 37, a connecting plate 39 is fixedly connected between one end of the pair of support rods 38 close to the movable seat 2, a force gauge 40 is arranged between the connecting plate 39 and the sliding seat 37, and a contact rod 41 is fixedly connected to the end face of the connecting plate 39 away from the support rod 38, and the contact rod 41 is used to abut against the multiple upper sample boxes 3.

[0052] By abutting the contact rod 41 against the upper sample box 3 to be tested, when a shear test is performed, the moment can be transmitted to the dynamometer 40 through the contact rod 41 and the sliding seat 37 to obtain the shear stress.

[0053] A further optimized solution is that a slide groove 42 is provided on the support frame 8, the sliding seat 37 is slidably connected in the slide groove 42, two rows of third bolt holes 43 are provided on the slide groove 42, and a pair of fourth bolt holes 44 is provided on the sliding seat 37. The pair of fourth bolt holes 44 are threadedly connected to the two rows of third bolt holes 43 through second fixing bolts 45.

[0054] By adjusting the position of the sliding seat 37 , the contact rod 41 can be made to correspond to the upper sample box 3 to be tested, and fixed via the second fixing bolt 45 , the third bolt hole 43 and the fourth bolt hole 44 .

[0055] Directions:

[0056] First, multiple shear boxes are stacked on top of the movable seat 2, and soil samples are placed in each shear box. At the same time, the positioning mechanism limits the upper sample box 3, the lower sample box 4 and the pressure transmission plate 5 in the horizontal direction, and the two adjacent shear boxes are connected and fixed, and the lowest shear box is connected and fixed to the movable seat 2.

[0057] Then, the force measuring mechanism is slid to make the contact rod 41 abut against the side wall of the upper sample box 3 at the top, and a shear test of the soil sample in the upper shear box is carried out. The upper sample box 3, the lower sample box 4 and the pressure transmission plate 5 are canceled from the horizontal limit through the positioning mechanism, and the pressure value data is monitored by the pressure sensor 7, which is abutted against the upper pressure transmission plate 5, and a weight of the required pressure value is placed on the weight plate 6. The moving seat 2 is driven to translate horizontally through the translation mechanism, and the dynamometer 40 obtains the shear stress. After the test is completed, the translation mechanism drives the moving seat 2 back to the initial position, and the upper sample box 3, the lower sample box 4 and the pressure transmission plate 5 in the shear box are limited in the horizontal direction through the positioning mechanism.

[0058] Then, the force measuring mechanism is slid to make the contact rod 41 abut against the side wall of the upper sample box 3 being tested, and the upper sample box 3, the lower sample box 4 and the pressure transmission plate 5 are cancelled in the horizontal direction through the positioning mechanism, and the weight on the weight plate 6 is replaced (while considering the weight of the shear box above the pressure transmission plate 5), and the moving seat 2 is driven to translate horizontally through the translation mechanism again, and the force gauge 40 obtains the shear stress. After the test is completed, the translation mechanism drives the moving seat 2 back to the initial position, and the upper sample box 3, the lower sample box 4 and the pressure transmission plate 5 in the shear box are limited in the horizontal direction through the positioning mechanism.

[0059] Repeat the above steps for subsequent soil sample shear tests.

[0060] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0061] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A geotechnical dynamic direct shear test device, characterized in that: include: A base (1), wherein a translation mechanism is disposed on the top surface of the base (1), and a moving seat (2) is slidably engaged with the translation mechanism; A plurality of shear boxes, wherein the plurality of shear boxes are arranged in parallel from top to bottom, the shear boxes comprising an upper sample box (3), a lower sample box (4) and a pressure transmission plate (5), the upper sample box (3) being provided with a positioning mechanism, the positioning mechanism being detachably connected to the lower sample box (4) and the pressure transmission plate (5), respectively, the lower sample box (4) at the bottom being detachably connected to the movable seat (2), and the lower sample box (4) being further detachably connected to the pressure transmission plate (5) in another of the shear boxes; A weight plate (6), the weight plate (6) being arranged above the plurality of shear boxes through a lifting mechanism, a pressure sensor (7) being arranged on the bottom surface of the weight plate (6), the pressure sensor (7) being in contact with the uppermost pressure transmission plate (5); A support frame (8), the support frame (8) being arranged on one side of the translation mechanism, and a force measuring mechanism being slidably matched on the support frame (8), the force measuring mechanism being used to detect the shear stress of the plurality of upper sample boxes (3); The positioning mechanism comprises a second motor (13), the second motor (13) is arranged on the side wall of the upper sample box (3), the output shaft of the second motor (13) is drivingly connected to a main transmission component, the main transmission component is drivingly connected to a plurality of auxiliary transmission components, the auxiliary transmission components are drivingly connected to a plurality of rotating rods (14), the lower sample box (4) is provided with a plurality of through holes (15) for accommodating the rotating rods, the rotating rods (14) are rotatably connected in the through holes (15), The two ends of the rotating rod (14) are respectively oriented toward the pressure transmission plate (5) and the lower sample box (4); the two ends of the rotating rod (14) are respectively provided with inserting tubes (16) threadedly sleeved thereon; the side wall of the inserting tube (16) is fixedly connected with a plurality of clamping strips (17); the side wall of the through hole (15) begins to have a clamping groove (18) which is slidably matched with the clamping strip (17); the pressure transmission plate (5) and the lower sample box (4) are respectively provided with plugging holes (19) which correspond to and are plugged into the plurality of inserting tubes (16) one by one; The auxiliary transmission assembly comprises an auxiliary transmission rod (20), a groove (21) for accommodating the auxiliary transmission rod (20) is provided on the upper sample box (3), the groove (21) is communicated with the corresponding through hole (15), the auxiliary transmission rod (20) is rotatably connected in the groove (21), and one end of the auxiliary transmission rod (20) is transmission-connected to the main transmission assembly, the auxiliary transmission rod (20) is provided with a plurality of coaxial worms (22), the worms (22) are meshed with a worm wheel (23), the plurality of worm wheels (23) correspond to the plurality of rotating rods (14) one by one, and the worm wheel (23) is sleeved on the rotating rod (14); The main transmission assembly comprises a main bevel gear (24), the main bevel gear (24) is fixedly connected to the output shaft of the second motor (13), the main bevel gear (24) is meshedly connected to a plurality of first sub-bevel gears (25), the first sub-bevel gears (25) are fixedly connected to a main transmission rod (26), one end of the main transmission rod (26) away from the first sub-bevel gear (25) is fixedly connected to a second sub-bevel gear (27), the second sub-bevel gear (27) is meshedly connected to a third sub-bevel gear (28), the plurality of third sub-bevel gears (28) correspond one-to-one to the plurality of sub-transmission rods (20), and the third sub-bevel gear (28) is fixedly connected to the sub-transmission rod (20).

2. A geotechnical dynamic direct shear test device according to claim 1, characterized in that: The translation mechanism comprises a first motor (9), a lead screw (10), a lead screw nut (11) and a pair of smooth rods (12); the first motor (9), the lead screw (10) and the pair of smooth rods (12) are all arranged on the base (1); the lead screw nut (11) is arranged on the moving seat (2), and the lead screw nut (11) is threadedly connected to the lead screw (10); the pair of smooth rods (12) penetrate the moving seat (2) and slide with the moving seat (2); the lead screw (10) is connected to the output shaft of the first motor (9).

3. A geotechnical dynamic direct shear test device according to claim 1, characterized in that: The side wall of the lower sample box (4) is fixedly connected with a plurality of first connecting plates (29), and the first connecting plates (29) are threadedly connected with a first fixing bolt (30). The pressure transmission plate (5) is fixedly connected with a plurality of second connecting plates (31), and the second connecting plates (31) are provided with a first bolt hole (32). The plurality of first fixing bolts (30) correspond one-to-one to the plurality of first bolt holes (32) and are threadedly connected.

4. A geotechnical dynamic direct shear test device according to claim 3, characterized in that: The movable seat (2) is provided with a plurality of second bolt holes (33), and the plurality of second bolt holes (33) correspond one-to-one to the plurality of first fixing bolts (30) and are threadedly connected.

5. A geotechnical dynamic direct shear test device according to claim 1, characterized in that: The lifting mechanism comprises a pair of lifting cylinders (34), the lifting cylinders (34) are fixedly mounted on the base (1), the pair of lifting cylinders (34) are respectively located on both sides of the movable seat (2), a support plate (35) is fixedly connected between the output ends of the pair of lifting cylinders (34), a telescopic rod (36) is fixedly connected to the support plate (35), and one end of the telescopic rod (36) away from the support plate (35) is fixedly connected to the weight plate (6).

6. A geotechnical dynamic direct shear test device according to claim 1, characterized in that: The force measuring mechanism comprises a sliding seat (37), the sliding seat (37) is slidably connected to the supporting frame (8), a pair of supporting rods (38) are slidably passed through the sliding seat (37), a connecting plate (39) is fixedly connected between one end of the pair of supporting rods (38) close to the movable seat (2), a force gauge (40) is arranged between the connecting plate (39) and the sliding seat (37), and a contact rod (41) is fixedly connected to the end surface of the connecting plate (39) away from the supporting rod (38), and the contact rod (41) is used to abut against the plurality of upper sample boxes (3).

7. A geotechnical dynamic direct shear test device according to claim 6, characterized in that: The support frame (8) is provided with a slide groove (42), the sliding seat (37) is slidably connected in the slide groove (42), the slide groove (42) is provided with two rows of third bolt holes (43), the sliding seat (37) is provided with a pair of fourth bolt holes (44), and the pair of fourth bolt holes (44) are threadedly connected to the two rows of third bolt holes (43) through second fixing bolts (45).

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