Method for preparing different joint roughness class rock test pieces

Abstract

The application discloses a preparation method of different joint roughness rock-like test pieces and belongs to the technical field of rock-like test piece preparation methods. The preparation method comprises the following steps: assembling a preparation device for different joint roughness rock-like test pieces, wherein the preparation device comprises, from top to bottom, a combined mold, a joint template, a mold assembly and disassembly assembly and a joint template position adjusting assembly; and then adjusting the roughness of the joint template by the joint template position adjusting assembly to prepare the rock-like test piece. The preparation device corresponding to the preparation method realizes general prefabrication of rough joint test pieces in cylindrical and cubic shapes by designing an external circular and internal square prefabricated surface. The accurate and controllable roughness of different joints is realized by fine adjustment and control of the displacement depth of the template microelement. The free design of different types of joint surfaces is realized by free and convenient assembly of the template microelement form. Finally, the rock-like test piece joint with controllable roughness and rich forms can be manufactured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of rock-like specimen preparation methods, in particular to a rock-like specimen preparation method with different joint roughness. BACKGROUND

[0002] Due to factors such as geological tectonic movement, rock-forming material properties, and environmental external forces, a large number of complex fractures are contained in engineering rock mass, and most of the fractures are irregular structural surfaces with rough and rugged surfaces, which puts higher requirements on the true and objective analysis of the stress state of fractured rock mass in engineering activities. Therefore, it is imperative to develop experimental instruments that can process joint roughness rock-like specimens close to the actual situation.

[0003] At present, the method for processing rough joints on the surface of rock-like specimens is relatively single and has poor universality, and most of them are precast joint templates with fixed shapes that are poured and formed at specified positions of the mold, which is difficult to meet the needs of simulating a large number of complex and variable rough joints. The invention patent with application number CN202111340078.4 proposes a rock-like specimen preparation device and method containing three-dimensional natural roughness closed joints, which realizes the preparation of non-penetrating closed joint rock-like specimens with different sizes, orientations, and spacing of natural roughness, but still uses fixed shape mold precast joints with poor universality. The invention patent application file with application number CN202010684666.9 proposes a device and method for making rock joints with different roughness, which uses the same two compression strips to cooperate with the splitting rock to form fresh joint surfaces with different roughness, thereby facilitating the study of the mechanical properties of joint rock bodies with different roughness characteristics, but the device still cannot precast fractures with specified surface roughness requirements. SUMMARY

[0004] In view of the above problems, the present application aims to provide a rock-like specimen preparation method with different joint roughness, and a preparation device corresponding to the preparation method, which realizes the universal precasting of rough joint specimens in cylindrical and cubic shapes by designing external circular and internal square precast surfaces; realizes the accurate control of different roughness joints by fine-tuning the depth of the template micro-element movement; realizes the free design of different types of joint surfaces by freely and conveniently assembling the template micro-element form; and finally can manufacture roughness-controllable and form-rich rock-like specimen joints.

[0005] To achieve the above purpose, the technical solution adopted by the present application is as follows:

[0006] The rock-like specimen preparation method with different joint roughness comprises the following steps,

[0007] S1: Assemble a different joint roughness rock-like specimen preparation device, which comprises a combined mold, a joint template, a template assembly and disassembly assembly and a joint template position adjusting assembly from top to bottom;

[0008] S2: According to the joint roughness requirement of the rock-like specimen to be prepared, adjust the shape of the joint template through the joint template position adjusting assembly;

[0009] S3: Pour cement mortar into the combined mold, and take out the combined mold after the cement mortar solidifies;

[0010] S4: Seal one end of the combined mold, pour cement mortar from the other end, then seal both ends of the combined mold, and then take out the specimen from the combined mold after the cement mortar solidifies;

[0011] S5: Disassemble and clean the different joint roughness rock-like specimen preparation device.

[0012] Further, the combined mold comprises a cylindrical outer cylinder, a square inner cylinder is detachably connected in the outer cylinder, a connecting rod is fixedly arranged at the top of each corner of the inner cylinder, a limiting column is fixedly arranged at the top outside of each connecting rod, a limiting through hole matched with the limiting column is formed in the wall of the outer cylinder, and the limiting through hole penetrates the outer cylinder along the axial direction of the outer cylinder.

[0013] Further, the joint template comprises an iron ring, a plurality of cylindrical protrusions matched with the limiting through hole are fixedly arranged at the top of the iron ring, a first limiting mechanism is arranged in the cylindrical protrusion, a plurality of side holes corresponding to the first limiting mechanism are formed in the wall of the outer cylinder, and each side hole is in communication with the corresponding limiting through hole;

[0014] A plurality of connecting grooves for connecting the template assembly and disassembly assembly are formed in the bottom of the iron ring, and a plurality of template micro elements are movably connected in the iron ring, the middle part of the plurality of template micro elements forms a cylindrical structure, and the top part is an irregular surface.

[0015] Further, the first limiting mechanism comprises a first installation slot formed in the side surface of the cylindrical protrusion, a hemispherical clamping cover is slidably connected in the first installation slot, a return spring is arranged between the hemispherical clamping cover and the inner side wall of the installation slot, and the side hole is matched with the hemispherical clamping cover.

[0016] Further, each of the template micro units comprises a template micro unit upper section, a template micro unit middle section and a template micro unit lower section, the template micro unit upper section is of any shape, the template micro unit middle section is of a cubic structure, and a front-rear communicating mounting through hole is formed on the template micro unit middle section, a power-on solenoid is mounted in the mounting through hole, two front-rear adjacent power-on solenoids are in contact with each other, and the shape of the template micro unit middle section corresponding to the template micro unit located at the outermost periphery matches the shape of the inner side wall of the iron circular ring.

[0017] Further, the power-on solenoid comprises a wire tube, a wire is wound on the wire tube, both ends of the wire are connected with metal sheets, and a second mounting groove matching the metal sheets is further formed on the front side and the rear side of the template micro unit middle section, and the second mounting groove communicates with the mounting through hole.

[0018] A ring-shaped groove is formed on the inner side wall of the iron circular ring, a conductive ring is arranged in the ring-shaped groove, and the metal sheets corresponding to the template micro units located at the outermost periphery are in contact with the conductive ring; two wire rods for connecting a power supply are connected to the conductive ring, two insertion holes matching the wire rods are formed on the iron circular ring, and the insertion holes communicate with the ring-shaped groove.

[0019] Further, the template assembly and disassembly assembly comprises a ring-shaped shell, a plurality of clamping rings matching the connecting grooves are fixedly arranged on the top of the ring-shaped shell, a plurality of limiting rod members matching the template micro units are movably arranged in the ring-shaped shell, the top of each of the limiting rod members is detachably connected with the corresponding template micro unit, a thin rod through hole is formed on each of the limiting rod members along the length direction, and a thin rod is detachably connected in the thin rod through hole; two adjacent limiting rod members are in sliding connection.

[0020] Further, two second limiting mechanisms are symmetrically arranged on the template micro unit lower section corresponding to each of the template micro units, two clamping grooves matching the second limiting mechanisms are arranged on both sides of the thin rod through hole close to the top, and two yielding grooves are further arranged above the two clamping grooves.

[0021] Further, the joint template position adjusting assembly comprises a plurality of driving rod members corresponding to the limiting rod members, each of the driving rod members is located at the bottom of the corresponding limiting rod member, and two adjacent driving rod members are also in sliding connection.

[0022] A threaded through hole is formed on the center of each of the driving rod members along the vertical direction, a driving screw is threadedly connected in the threaded through hole, the driving screw penetrates through the bottom of the threaded through hole, a rotating shaft is fixedly arranged on the bottom of the driving screw, a driving gear is fixedly arranged on the bottom of the rotating shaft, and two adjacent driving gears are in meshing engagement with each other.

[0023] The joint template position adjusting assembly further comprises a driving mechanism for driving the plurality of driving rods to move up and down.

[0024] Further, the driving mechanism comprises a driving disc, the center of the driving disc is an open structure, and the inner side wall bottom of the driving disc is provided with a ring of gear grooves, and the driving gears located at the periphery are engaged with the gear grooves.

[0025] A ring of clamping plates is fixed at the middle position of the inner side wall of the driving disc, a rotating disc is clamped and rotatably arranged on the clamping plate, a plurality of rotating through holes matched with the rotating shafts are formed in the rotating disc, and each rotating shaft rotatably penetrates through the corresponding rotating through hole.

[0026] The beneficial effects of the present application are that, compared with the prior art,

[0027] 1. In the present application, the preparation method of different roughness rock-like test pieces can adjust the shape of the joint template in advance when assembling the different joint roughness rock-like test piece preparation device, so that the top surface of the joint template forms an irregular surface with different concave and convex degrees, and then different roughness rock-like test pieces can be prepared.

[0028] 2. In the present application, the joint template in the different joint roughness rock-like test piece preparation device comprises a plurality of template micro elements, the middle sections of different template micro elements are fixed by energized solenoids, thereby forming a cylindrical overall structure and playing a role of fixed support, the upper sections of different template micro elements adopt different shapes, thereby forming an irregular surface, which can be used for the preparation of rock-like test pieces containing roughness; and the up and down movement of each template micro element can make the up and down movement between a plurality of template micro elements, thereby freely and conveniently assembling the shape of all template micro elements and realizing the free design of different types of joint surfaces.

[0029] 3. In the preparation device for rock specimens with different joint roughness of the present invention, the adjustment of the template micro-element is achieved through the joint template position adjustment component. When the drive disk is rotated, the outermost drive gear is driven to rotate through the gear groove on the drive disk. The rotation of all drive gears is achieved through the meshing relationship between the drive gears, and the rotation directions of two adjacent drive gears are opposite, thereby driving different drive rods to rise or fall. During the rising or falling process of the drive rods, the limiting rods will rise or fall, and during the rising or falling process of the limiting rods, the template micro-elements connected to them will rise or fall, thereby realizing the height adjustment of each template micro-element, that is, realizing the vertical displacement between multiple template micro-elements, thereby enabling free and convenient assembly of the shape of all template micro-elements. This adjustment method can not only adjust multiple template micro-elements simply and quickly, but also deeply and finely control the vertical displacement of the template micro-elements, achieving precise control of joints with different roughness.

[0030] 4. In the preparation device for rock specimens with different joint roughness of the present invention, a thin rod can be detachably connected to each limiting rod. When disassembling the preparation device for rock specimens with different joint roughness, if only a few template micro-elements need to be disassembled, a thin rod can be inserted into the corresponding limiting rod, and the corresponding template micro-elements can be disassembled by pushing the thin rod upward, which has a high degree of flexibility.

[0031] 5. The device for preparing rock specimens with different joint roughness of the present invention can simultaneously prepare rock specimens with controllable roughness and rich forms, thereby processing rock specimens with joint roughness close to that under real conditions. This provides a basis for the equipment to objectively analyze the stress state of fractured rock masses in engineering activities. In addition, the device is easy to disassemble and has a wide range of applications. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the device for preparing rock specimens with different joint roughness according to the present invention.

[0033] Figure 2 This is a front view of the structure of the device for preparing rock specimens with different joint roughness according to the present invention.

[0034] Figure 3 This is a side-view, bottom-view, axonometric view of the combined mold structure of the present invention.

[0035] Figure 4 This is a top-view axonometric view of the combined mold structure of the present invention.

[0036] Figure 5 This is a bottom view of the combined mold structure of the present invention.

[0037] Figure 6For the invention joint template side view structure axonometric drawing.

[0038] Figure 7 For the invention joint template upside down view structure axonometric drawing.

[0039] Figure 8 For the invention joint template structure front view.

[0040] Figure 9 For the invention iron ring structure axonometric drawing.

[0041] Figure 10 For the invention conductive ring and wire rod structure schematic diagram.

[0042] Figure 11 For the invention first limiting mechanism structure schematic diagram.

[0043] Figure 12 For the invention template microstructure front view.

[0044] Figure 13 For the invention power solenoid structure schematic diagram.

[0045] Figure 14 For the invention template microstructure exploded view.

[0046] Figure 15 For the invention template assembly and disassembly components and template microstructure overall structure schematic diagram.

[0047] Figure 16 For the invention template assembly and disassembly components structure front view.

[0048] Figure 17 For the invention limiting rod structure axonometric drawing.

[0049] Figure 18 For the invention limiting rod internal structure schematic diagram.

[0050] Figure 19 For the invention joint template position adjustment assembly structure axonometric drawing.

[0051] Figure 20 For the invention drive screw and shaft structure schematic diagram.

[0052] Figure 21 For the invention drive disc structure schematic diagram.

[0053] Figure 22 For the invention drive disc and turntable connection relationship schematic diagram.

[0054] Figure 23 For the invention shaft and turntable between the position relationship schematic diagram.

[0055] Wherein: 1-outer barrel, 101-limiting through hole, 102-side hole, 103-semi-cylinder, 104-connection ear, 105-connection bolt, 2-inner barrel, 201-semi-square barrel, 3-connection rod, 4-limiting column, 5-iron ring, 501-connection groove, 502-annular groove, 503-conductive ring, 504-conductive rod, 505-jack, 6-cylindrical protrusion, 601-first installation groove, 602-hemispherical cover, 603-reset spring, 7-template microelement, 701-template microelement upper section, 702-template microelement middle section, 703-template microelement lower section, 704-installation through hole, 705-electricity passing solenoid, 7051-coil tube, 7052-conductive wire, 7053-metal sheet, 706-second installation groove, 707-second limiting mechanism, 8-annular shell, 801-clamp ring, 9-limiting rod, 901-thin rod through hole, 902-bump, 903-slotted, 904-clamping groove, 905-giving slot, 10-thin rod, 11-driving rod, 1101-threaded through hole, 12-driving screw, 13-rotating shaft, 1301-driving gear, 14-driving disc, 1401-gear groove, 1402-clamping plate, 15-rotating disc, 1501-rotating through hole. DETAILED DESCRIPTION

[0056] In order for those skilled in the art to better understand the technical solutions of the present application, the technical solutions of the present application will be further described below in combination with the drawings and examples.

[0057] Referring to the drawings Figures 1-23 The preparation method of the different joint roughness class rock specimen is shown in the drawings, and comprises the following steps,

[0058] S1: Assemble the different joint roughness class rock specimen preparation device, which comprises a combined mold, a joint template, a template assembly and disassembly assembly, and a joint template position adjusting assembly from top to bottom; the combined mold and the joint template are detachably connected, the joint template and the template assembly and disassembly assembly are also detachably connected, and the template assembly and disassembly assembly and the joint template position adjusting assembly are in contact but not connected from top to bottom.

[0059] S2: According to the joint roughness requirement of the class rock specimen to be prepared, adjust the shape of the joint template through the joint template position adjusting assembly;

[0060] S3: Pour cement mortar into the combined mold, and take out the combined mold after the cement mortar solidifies;

[0061] S4: Seal one end of the combined mold, pour cement mortar from the other end, then seal both ends of the combined mold, and take out the specimen from the combined mold after the cement mortar solidifies;

[0062] S5: disassemble and clean the different joint roughness rock-like specimen preparation device.

[0063] Specifically, the combined mold comprises a cylindrical outer cylinder 1, a square inner cylinder 2 is detachably connected in the outer cylinder 1, a connecting rod 3 is fixedly arranged at the top of each corner of the inner cylinder 2, a limiting column 4 is fixedly arranged at the top outside of each connecting rod 3, a limiting through hole 101 matched with the limiting column 4 is formed in the wall of the outer cylinder 1, and the limiting through hole 101 penetrates the outer cylinder 1 along the axial direction of the outer cylinder 1, and the inner cylinder 2 is suspended and fixed in the outer cylinder 1 by inserting the limiting column 4 into the top of the corresponding limiting through hole 101, and the bottom surface of the outer cylinder 1 is substantially consistent with the bottom surface of the inner cylinder 2.

[0064] More specifically, the outer cylinder 1 comprises two symmetrical half-cylinders 103, the edges of the two half-cylinders 103 can be completely attached to form a complete cylindrical outer cylinder 1, a connecting lug 104 is fixedly arranged on the outer side wall of each half-cylinder 103 close to the edge, and the two connecting lugs 104 corresponding to each other are detachably connected through a connecting bolt 105, and the two half-cylinders 103 can be fixed through the connecting bolt 105, and after the rock-like specimen preparation is completed, the connecting bolt 105 is opened, the two half-cylinders 103 are moved away from both sides of the rock-like specimen, and the prepared rock-like specimen can be conveniently and quickly taken out.

[0065] The inner cylinder 2 comprises two symmetrical half-square cylinders 201, and the connecting mode between the two half-square cylinders 201 is the same as that between the two half-cylinders 103, that is, the connecting lug 104 is also fixedly arranged on the outer side wall of each half-square cylinder 201 close to the edge, and the two connecting lugs 104 corresponding to each other on the half-square cylinder 201 are also detachably connected through the connecting bolt 105. The outer cylinder 1 is in a cylindrical shape, and the inner cylinder 2 is in a square shape, so that rock-like specimens of different shapes can be prepared according to actual needs.

[0066] Further, the joint template comprises an iron ring 5, a plurality of cylindrical protrusions 6 matched with the limiting through hole 101 are fixedly arranged on the top of the iron ring 5, a first limiting mechanism is arranged in the cylindrical protrusion 6, a plurality of side holes 102 corresponding to the first limiting mechanism are also formed in the wall of the outer cylinder 1, and each side hole 102 is in communication with the corresponding limiting through hole 101; the cylindrical protrusion 5 is inserted from the bottom of the limiting through hole 101, and the fixing between the outer cylinder 1 and the iron ring 5 can be realized through the cooperation of the first limiting mechanism and the side hole 102, and the outer cylinder 1 and the iron ring 5 can also be disassembled.

[0067] The first limiting mechanism comprises a first mounting slot 601 formed in the side surface of the cylindrical protrusion 6, a semispherical clamping cover 602 is slidably connected in the first mounting slot 601, a reset spring 603 is arranged between the semispherical clamping cover 602 and the inner side wall of the mounting slot 601, and the side hole 102 is matched with the semispherical clamping cover 602. When the cylindrical protrusion 6 is inserted into the limiting through hole 101, the reset spring 603 is pressed, the semispherical clamping cover 602 is moved upward along the limiting through hole 101, when the semispherical clamping cover 602 is moved to the position corresponding to the side hole 102, the reset spring 603 is restored due to no external force, so that the semispherical clamping cover 602 is pushed into the corresponding side hole 102, and the fixing between the outer cylinder 1 and the iron ring 5 is realized; when the outer cylinder 1 and the iron ring 5 are disassembled, the semispherical clamping cover 602 only needs to be pressed inward to be located in the limiting through hole 101, and then the iron ring 5 is moved.

[0068] Further, a plurality of template micro elements 7 are movably connected in the iron ring 5, the middle part of each template micro element 7 is formed in a cylindrical structure, and the top part is an irregular surface. Each template micro element 7 comprises a template micro element upper segment 701, a template micro element middle segment 702 and a template micro element lower segment 703, the template micro element middle segment 702 is fixedly connected with the template micro element upper segment 701 and the template micro element lower segment 703, so as to form an integral structure; the template micro element upper segment 701 is in any shape, such as a boss, a triangular pyramid, a prism and the like, different combinations of different shapes can form joint surfaces with different complexities; the template micro element middle segment 702 is in a cubic structure, a mounting through hole 704 is formed in the front and back of the template micro element middle segment 702, a power solenoid 705 is mounted in the mounting through hole 704, the power solenoid 705 comprises a solenoid tube 7051, a wire 7052 is wound on the solenoid tube 7051, metal sheets 7053 are connected to the two ends of the wire 7052, second mounting slots 706 are formed in the front side and the back side of the template micro element middle segment 702 and matched with the metal sheets 7053, and the second mounting slots 706 are communicated with the mounting through hole 704; the solenoid tube 7051 and the metal sheet 7053 of the power solenoid 705 adjacent to the front and back are in contact with each other, the shape of the template micro element middle segment 702 corresponding to the template micro element 7 at the outermost position is matched with the shape of the inner side wall of the iron ring 5, and the shape of the template micro element middle segment 702 corresponding to the template micro element 7 at the inner side is a regular cubic shape, so as to be convenient for fixing.

[0069] The inner side wall of the iron ring 5 is provided with a ring-shaped groove 502, and a conductive ring 503 is arranged in the ring-shaped groove 502. The metal sheet 7053 corresponding to the outermost template micro-element 7 is in contact with the conductive ring 503. The conductive ring 503 is connected with two wire rods 504 for connecting the power supply. The iron ring 5 is provided with two insertion holes 505 matched with the wire rods 504, and the insertion holes 505 are communicated with the ring-shaped groove 502. When the wire rods 504 are connected with the power supply, the entire conductive ring 503 is electrified, so that the metal sheet 7053 in contact with the conductive ring 503 is electrified. The two metal sheets 7053 on each electrified solenoid 705 are communicated through the wire 7052, and the two metal sheets 7053 on the front and rear adjacent electrified solenoids 705 are in contact with each other, so that the entire circuit is connected. When the wire 7052 is electrified, the electromagnetic field generated thereby causes the two adjacent electrified solenoids 705 to be attracted to each other, and the outermost template micro-element 7 is attracted to the iron ring 5. A plurality of template micro-elements 7 in the front and rear directions form a long strip-shaped template, and each long strip-shaped template is fixed on the iron ring 5, so that all the template micro-elements 7 are fixed in the iron ring 5.

[0070] Further, the bottom of the iron ring 5 is provided with a plurality of connection grooves 501 for connecting the template assembly and disassembly assembly. The template assembly and disassembly assembly comprises a ring-shaped housing 8, and a plurality of clamping rings 801 matched with the connection grooves 501 are arranged on the top of the ring-shaped housing 8. The clamping ring 801 and the corresponding connection groove 501 are connected by buckling connection. The iron ring 5 and the ring-shaped housing 8 can be detachably connected through the cooperation of the clamping ring 801 and the connection groove 501.

[0071] A plurality of limiting rod members 9 matched with the template micro-elements 7 are movably arranged in the ring-shaped housing 8. The number of the limiting rod members 9 is the same as the number of the template micro-elements 7, and each limiting rod member 9 is in one-to-one correspondence with the template micro-element 7. The top of each limiting rod member 9 is detachably connected with the corresponding template micro-element 7. A thin rod through hole 901 is formed in the length direction of each limiting rod member 9, and a thin rod 10 is detachably connected in the thin rod through hole 901. The adjacent two limiting rod members 9 are slidably connected.

[0072] Specifically, two side edges of each of the limiting rod members 9 are fixed with protrusions 902, and the other two side edges of the limiting rod member 9 are provided with sliding grooves 903 matched with the protrusions 902, the sliding grooves 903 extend along the long axis direction of the limiting rod member 9, and the adjacent two limiting rod members 9 are connected with each other through the cooperation of the protrusions 902 and the sliding grooves 903, which can not only ensure the complete contact between the adjacent two limiting rod members 9, but also realize the up-down sliding between the adjacent two limiting rod members 9, so as not to affect the adjustment of the position of the single template microelement 7. A plurality of limiting rod members 9 surround a complete cylindrical structure, and the outer side wall of the cylindrical structure is in contact with but not connected with the annular shell 8, and can move up and down in the annular shell 8.

[0073] Each of the template microelement lower sections 703 corresponding to the template microelement 7 is a regular rectangular column structure, two second limiting mechanisms 707 are symmetrically arranged on the two sides of the rectangular column structure, and the second limiting mechanism 707 can adopt the same structure as the first limiting mechanism, which will not be described here; two semispherical clamping grooves 904 matched with the second limiting mechanism 707 are arranged in communication on the two sides close to the top of the thin rod through hole 901, and two 1 / 4 spherical accommodation grooves 905 are further arranged above the two clamping grooves 904, in use, first, the semispherical clamping cover in the two second limiting mechanisms 707 is clamped into the accommodation groove 905, then the template microelement 7 is pressed downward, at this time, the return spring in the second limiting mechanism 707 is compressed to shrink into the thin rod through hole 901, when the semispherical clamping cover moves to the position corresponding to the clamping groove 904, the return spring restores the deformation to push the semispherical clamping cover into the corresponding clamping groove 904, realizing the connection between the template microelement lower section 703 and the limiting rod member 9. When the single fiber rod member 9 moves up and down, the corresponding template microelement 7 can be driven to move up and down.

[0074] Further, the joint template position adjusting assembly includes a plurality of drive rod members 11 corresponding to the limiting rod members 9, each of the drive rod members 11 is located at the bottom of the corresponding limiting rod member 9, and the adjacent two drive rod members 11 are also in sliding connection, and the sliding connection between the drive rod members 11 can adopt the same sliding connection as the limiting rod member 9, which will not be described here.

[0075] The center of each driving rod 11 is provided with a threaded hole 1101 in vertical direction, and a driving screw 12 is threadedly connected in the threaded hole 1101, the driving screw 12 penetrates the bottom of the threaded hole 1101, and the bottom of the driving screw 12 is fixedly provided with a rotating shaft 13, the bottom of the rotating shaft 13 is fixedly provided with a driving gear 1301, and the adjacent two driving gears 1301 are engaged with each other; the size of the threaded hole 1101 is also matched with the size of the thin rod 10, so that the thin rod 10 can be inserted into the corresponding threaded hole 1101. The corresponding connection between the template assembling and disassembling assembly and the template position adjusting assembly can also be realized through the cooperation of the thin rod 10 and the threaded hole 1101.

[0076] The joint template position adjusting assembly further comprises a driving mechanism for driving the up and down movement of the plurality of driving rods 11; the driving mechanism comprises a driving disc 14, the center of the driving disc 14 is an open structure, and the inner side wall of the driving disc 14 is provided with a ring of gear grooves 1401 at the bottom, and the driving gears 1301 located at the periphery are engaged with the gear grooves 1401;

[0077] A circle of clamping plates 1402 is fixed in the middle position of the inner side wall of the driving disc 14, the rotating disc 15 is clamped and rotates on the clamping plates 1402, a plurality of rotating through holes 1501 matched with the rotating shafts 13 are formed in the rotating disc 15, each rotating shaft 13 rotates through the corresponding rotating through hole 1501; the rotating disc 15 is used as a connecting member to connect all the rotating shafts 13 to form an integral structure, when the driving disc 14 rotates, the rotating disc 15 is stationary, and the rotating shaft 13 can rotate in the corresponding rotating through hole 1501. When the driving disc 14 rotates, the outermost driving gear 1301 is driven to rotate through the gear groove 1401 on the driving disc 14, then the other driving gears 1301 are driven to rotate through the mutual meshing between the driving gears 1301, and the rotating directions of the adjacent driving gears 1301 are also different. The driving gear 1301 drives the corresponding driving screw 12 to rotate, and the driving rod 11 is limited by the mutual sliding connection between the driving rod 11 and the limiting rod 9, so that the driving rod 11 moves up and down in the process of rotating the driving screw 12, thereby driving the limiting rod 9 in contact with the driving rod 11 to move up and down (the thin rod 10 is inserted in the threaded through hole 1101 of the driving rod 11 and the thin rod through hole 901 of the limiting rod 9, and can guide the up and down movement of the limiting rod 9, since the thin rod 10 is in sliding connection with the threaded through hole 1101 and the thin rod through hole 901, the up and down movement of the limiting rod 9 is not affected; in order to improve the stability of the lifting of the driving rod 11 and the limiting rod 9, magnets can be arranged at the contact positions of the driving rod 11 and the limiting rod 9 to improve the stability), finally driving the template micro element 7 connected with the limiting rod 9 to move up and down, the adjacent template micro elements 7 move up and down in different directions, and the roughness of the joint surface formed by all the template micro elements 7 is adjusted.

[0078] The working principle of the present application is that the different joint roughness rock-like specimen preparation device in the present application is used to prepare different joint roughness rock-like specimens, and the more specific operation process is as follows:

[0079] S1: Assemble the different joint roughness rock-like specimen preparation device;

[0080] Specifically, (1) two half-cylinders 103 are fixed by connecting bolts 105 to form a complete outer cylinder 1, two half-square tubes 201 are fixed by connecting bolts 105 to form a complete inner cylinder 2, and the limiting column 4 at the top of the inner cylinder 2 is inserted into the corresponding limiting through hole 101 at the top (if a cylindrical rock-like specimen is needed, the inner cylinder 2 can not be placed), and the assembly of the combined mold is completed.

[0081] (2) According to the joint surface shape of the rock-like specimen to be prepared, the template microelement 7 corresponding to the different shape template microelement upper segment 701 is selected, and all the template microelements 7 are kept in the same plane, the iron circular ring 5 provided with the conductive ring 503 is sleeved outside the cylindrical structure formed by the template microelement 7, the conductive ring 503 is in contact with the metal sheet 7053 corresponding to the template microelement 7, and the assembly of the joint template is completed;

[0082] (3) The limiting rod 9 is surrounded to form a cylindrical structure corresponding to the template microelement 7, and the annular shell 8 is sleeved outside the cylindrical structure surrounded by all the limiting rods 9, and the assembly of the template assembly and disassembly assembly is completed;

[0083] (4) The wires 504 on both sides of the conductive ring 503 are connected to the power supply, the joint template is installed on the template assembly and disassembly assembly, the iron circular ring 5 and the annular shell 8 are fixedly connected through the connecting groove 501 and the snap ring 801, and the template microelement 7 and the corresponding limiting rod 9 are connected through the second limiting mechanism 707.

[0084] (5) The whole structure formed by the joint template and the template assembly and disassembly assembly is connected with the combined mold through the cylindrical protrusion 6 on the top of the iron circular ring 5, the first limiting mechanism arranged on the cylindrical protrusion 6, and the limiting through hole 101 and the side hole 102 at the bottom of the outer cylinder 1, and then the whole structure is placed on the top of the template position adjusting assembly, so that the driving rod 11 corresponds to the limiting rod 9, and the thin rod 10 is inserted into the threaded through hole 1101 of the driving rod 11 and the thin rod through hole 901 of the limiting rod 9; At this time, the assembly of the whole joint roughness rock-like specimen preparation device is completed.

[0085] S2: According to the joint roughness requirement of the rock-like specimen to be prepared, the shape of the joint template is adjusted through the joint template position adjusting assembly;

[0086] Specifically, the power supply connected to the conductive rod 504 is disconnected, so that there is no mutual attractive force between the adjacent template microelements 7, the driving disc 14 is rotated, the outermost driving gear 1301 is driven to rotate through the gear groove 1401 on the driving disc 14, then the other driving gears 1301 are driven to rotate through the mutual meshing between the driving gears 1301, and the rotation directions of the adjacent driving gears 1301 are also different, the driving of the driving gear 1301 drives the corresponding driving screw 12 to rotate, and the driving rod 11 is connected to the driving screw 12 through the sliding connection, so that the driving rod 11 moves up and down during the rotation of the driving screw 12, thereby driving the limiting rod 9 in contact with the driving rod 11 to move up and down, and finally driving the template microelement 7 connected with the limiting rod 9 to move up and down, the adjacent template microelements 7 move up and down in different directions, the roughness of the joint surface formed by all the template microelements 7 is adjusted.

[0087] S3: pouring cement mortar into the combined mold from the top of the combined mold, and taking out the combined mold after the cement mortar solidifies;

[0088] S4: sealing one end of the combined mold, pouring cement mortar into the combined mold from the other end, sealing both ends of the combined mold, and taking out the test piece from the combined mold after the cement mortar solidifies;

[0089] Specifically, when the combined mold is taken out in step S3, the rock-like test piece that has been prepared in the combined mold is removed, sealing one end of the combined mold can prevent the part of the rock-like test piece that has been formed in the combined mold from falling off, and pouring cement mortar into the combined mold from the other end is to continue to prepare the other half of the test piece by using the joint surface that has solidified as a mold, thereby forming a complete cylindrical or cubic test piece. When the test piece is taken out from the combined mold, the connecting bolts 105 outside the outer cylinder 1 or the inner cylinder 2 are opened, and the half-cylinder 103 or the half-square cylinder 201 is removed from both sides of the test piece.

[0090] S5: disassembling and cleaning the rock-like test piece preparation device with different joint roughnesses.

[0091] Specifically, after the combined mold is taken out, all the template micro elements 7 are adjusted to the same plane, the lead rod 504 is connected to the power supply, all the template micro elements 7 are adsorbed together with the iron circular ring 5, the joint template and the template assembly are disassembled, and all the template micro elements 7 can be disassembled at the same time. If only a small number of template micro elements 7 need to be disassembled, a thin rod 10 is inserted into the corresponding limiting rod, and the corresponding template micro element 7 can be disassembled by pushing the thin rod 10 upwards.

[0092] The basic principles, main features and advantages of the present application are shown and described above. Those skilled in the art should understand that the present application is not limited to the above embodiments, and the above embodiments and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A method for preparing rock specimens with different joint roughness, characterized in that, Includes the following steps, S1: An assembly device for preparing rock specimens with different joint roughnesses, the device comprising, from top to bottom, a combined mold, a joint template, a template assembly and disassembly assembly, and a joint template position adjustment assembly; the combined mold and the joint template are detachably connected. S2: Adjust the shape of the joint template by means of the joint template position adjustment component according to the joint roughness requirements of the rock-like specimen to be prepared; S3: Pour cement mortar into the mold assembly and remove the mold assembly after the cement mortar has solidified. S4: Seal one end of the mold, pour cement mortar into the other end, then seal both ends of the mold. After the cement mortar has solidified, remove the specimen from the mold. S5: Disassemble and clean the equipment for preparing rock specimens with different joint roughness. The joint template includes an iron ring (5), the bottom of which is provided with multiple connecting grooves (501) for connecting the template assembly and disassembly components, and several template micro-elements (7) are movably connected inside the iron ring (5). The middle part of the several template micro-elements (7) forms a cylindrical structure, and the top is an irregular surface. Each of the template micro-elements (7) includes an upper section (701), a middle section (702), and a lower section (703). The upper section (701) is of arbitrary shape, the middle section (702) is a cubic structure, and the middle section (702) is provided with a through hole (704) that is connected from front to back. A solenoid (705) is installed in the through hole (704), and two adjacent solenoids (705) are in contact with each other. The shape of the middle section (702) of the template micro-element (7) corresponding to the outermost template micro-element (7) matches the shape of the inner wall of the iron ring (5). The solenoid (705) includes a tube (7051), on which a wire (7052) is wound. Both ends of the wire (7052) are connected to metal sheets (7053). The front and rear sides of the template micro-element middle section (702) are also provided with second mounting grooves (706) that match the metal sheets (7053). The second mounting grooves (706) are connected to the mounting through holes (704). An annular groove (502) is formed on the inner side wall of the iron ring (5), and a conductive ring (503) is provided in the annular groove (502). The metal sheet (7053) corresponding to the outermost template micro-element (7) is in contact with the conductive ring (503). Two wire rods (504) for connecting to the power supply are connected to the conductive ring (503). Two insertion holes (505) matching the wire rods (504) are formed on the iron ring (5), and the insertion holes (505) are connected to the annular groove (502). The template assembly and disassembly assembly includes an annular shell (8). The top of the annular shell (8) is fixed with a plurality of retaining rings (801) that match the connecting groove (501). The annular shell (8) is movably provided with a plurality of limiting rods (9) that match the template micro-element (7). The top of each limiting rod (9) is detachably connected to the corresponding template micro-element (7). Each limiting rod (9) is provided with a thin rod through hole (901) along its length. A thin rod (10) is detachably connected in the thin rod through hole (901). Two adjacent limiting rods (9) are slidably connected. The joint template position adjustment assembly includes multiple driving rods (11) corresponding to the limiting rods (9). Each driving rod (11) is located at the bottom of the corresponding limiting rod (9), and two adjacent driving rods (11) are also slidably connected. Each of the drive rods (11) has a threaded through hole (1101) in the center along the vertical direction. A drive screw (12) is threadedly connected to the threaded through hole (1101). The drive screw (12) passes through the bottom of the threaded through hole (1101), and a rotating shaft (13) is fixedly provided at the bottom of the drive screw (12). A drive gear (1301) is fixedly provided at the bottom of the rotating shaft (13), and two adjacent drive gears (1301) mesh with each other. The joint template position adjustment assembly also includes a drive mechanism for driving the multiple drive rods (11) to move up and down; The driving mechanism includes a driving disk (14), the center of which is an open structure, and a gear groove (1401) is provided at the bottom of the inner sidewall of the driving disk (14), and the driving gear (1301) located on the periphery meshes with the gear groove (1401).

2. The method for preparing rock specimens with different joint roughness according to claim 1, characterized in that: The combined mold includes a cylindrical outer cylinder (1), and a square inner cylinder (2) is detachably connected inside the outer cylinder (1). Connecting rods (3) are fixed at the top of each of the four corners of the inner cylinder (2). A limiting post (4) is fixed on the outer side of the top of each connecting rod (3). A limiting through hole (101) matching the limiting post (4) is opened on the cylinder wall of the outer cylinder (1), and the limiting through hole (101) penetrates the outer cylinder (1) along the axial direction of the outer cylinder (1).

3. The method for preparing rock specimens with different joint roughness according to claim 2, characterized in that: The top of the iron ring (5) is fixed with a plurality of cylindrical protrusions (6) that match the limiting through holes (101). The cylindrical protrusions (6) are provided with a first limiting mechanism. The outer cylinder (1) is also provided with a plurality of side holes (102) corresponding to the first limiting mechanism, and each side hole (102) is connected to the corresponding limiting through hole (101).

4. The method for preparing rock specimens with different joint roughness according to claim 3, characterized in that: The first limiting mechanism includes a first mounting groove (601) opened on the side of the cylindrical protrusion (6), a hemispherical cover (602) is slidably connected in the first mounting groove (601), a return spring (603) is provided between the hemispherical cover (602) and the inner side wall of the first mounting groove (601), and the side hole (102) matches the hemispherical cover (602).

5. The method for preparing rock specimens with different joint roughness according to claim 4, characterized in that: Each template micro-element (7) has two second limiting mechanisms (707) symmetrically arranged on the lower section (703) of the template micro-element. The thin rod through hole (901) is connected to two slots (904) that match the second limiting mechanism (707) on both sides near the top. Two clearance slots (905) are also provided above the two slots (904).

6. The method for preparing rock specimens with different joint roughness according to claim 5, characterized in that: A ring of clamping plates (1402) is fixed at the middle position of the inner side wall of the drive disk (14). A turntable (15) is engaged and rotatably mounted on the clamping plate (1402). The turntable (15) has multiple rotating through holes (1501) that match the rotating shaft (13). Each rotating shaft (13) rotates through the corresponding rotating through hole (1501).

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