A device for preparing a shear strength sample of a soft and hard interbedded rock mass

Abstract

The utility model relates to rock mass sample preparation device technical field discloses a kind of shear strength sample preparation devices of soft and hard interbedded rock mass, including left mould and right mould, and the same side junction of left mould and right mould is provided with shaft pin, to realize the hinged rotation of left mould and right mould, left mould and right mould constitute placement space after moulding, and vibration is connected outside placement space, and left mould and right mould another side are provided with locking mechanism;Locking mechanism is used for left mould and right mould after moulding cooperate vibration operation.The device left and right half mould inside in production preset 0 °-90 ° range multiple groups of slot, can be inserted into stainless steel sheet according to test demand selection corresponding angle slot, through the partition effect of stainless steel sheet, the interbedded angle of soft and hard layer is accurately limited;Meanwhile, stainless steel sheet surface polishing treatment, after pulling out, soft and hard material can be naturally bonded to form clear structure surface, perfect simulation natural soft and hard interbedded rock mass layering characteristics.

Description

Technical Field

[0001] This utility model relates to the technical field of rock mass sample preparation device, and in particular to a shear strength sample preparation device for interbedded soft and hard rock masses. Background Technology

[0002] Interbedded soft-hard rock masses refer to layered geological structures composed of alternating layers of soft and hard rock with significant differences in strength. They are a common type of complex rock mass encountered in reservoir and tunnel construction, and are particularly widespread in the mountainous regions of southwestern my country and along the banks of large reservoirs. Therefore, studying the mechanical properties of interbedded soft-hard rock masses, especially their shear strength, is of significant engineering importance.

[0003] The interbedded rock mass of the reservoir bank is complex, with indistinct interlayer boundaries, making in-situ testing of interbedded rocks too costly and difficult. Therefore, to conduct in-depth research on interbedded rock masses, especially their mechanical behavior and instability mechanisms under the influence of external conditions such as reservoir water level fluctuations and rainfall infiltration, it is particularly urgent to develop a method and specialized apparatus for efficiently and accurately preparing interbedded rock samples with clear structural planes, specific dip angles, and good homogeneity in the laboratory.

[0004] Therefore, in order to prepare a batch of high-precision direct shear specimens of rock-like materials with different preset structural plane inclination angles, a specialized device is needed that has a simple preparation process, requires no subsequent cutting processing, can produce structural planes with different inclination angles, can achieve batch production, and is easy to demold. Utility Model Content

[0005] To address the technical challenges of preparing shear strength samples from naturally interbedded soft and hard rock masses, which are characterized by complex morphology, ambiguous structural planes, and difficulties in sample preparation, and the lack of specialized devices for precisely controlling the dip angle of structural planes during laboratory preparation, thus failing to simulate the geological conditions of interbedded soft and hard rock masses with different dip angles in engineering scenarios such as reservoirs and tunnels, this invention provides a sample preparation device for interbedded soft and hard rock masses.

[0006] This utility model is achieved using the following technical solution: a device for preparing shear strength test specimens of interbedded soft and hard rock masses, comprising:

[0007] The left mold and the right mold are connected by a pivot pin on the same side to enable the hinged rotation of the left mold and the right mold. After the left mold and the right mold are closed, they form a placement space. A vibrator is connected to the outside of the placement space. A locking mechanism is provided on the other side of the left mold and the right mold.

[0008] The locking mechanism is used to maintain stability after the left and right molds are closed and the vibrator is in operation.

[0009] As a further improvement to the above solution, the placement space includes multiple left and right baffles that are symmetrically, horizontally and uniformly fixedly connected to the left and right molds respectively. Multiple vibration spaces are formed sequentially by several sets of matching left and right baffles. Multiple inclined wire insertion slots are uniformly opened in each vibration space. The wire insertion slots are composed of matching left and right slots.

[0010] As a further improvement to the above solution, the tilt angle of each wire slot is different, and a stainless steel plate is inserted into each wire slot. The bottom of both the left and right molds are equipped with base supports.

[0011] As a further improvement to the above solution, the locking mechanism includes a fixed ring block fixedly connected to the outer wall of the left mold, a rotating ring rotatably connected to the fixed ring block, a bent hook fixedly connected to the outer end of the rotating ring, and a through hole opened at the hook.

[0012] As a further improvement to the above solution, the locking mechanism also includes an insert block fixedly connected to the outer wall of the right mold. The middle part of the insert block is hollowed out and inserted into the ring hook. A cylinder is fixedly connected to the middle of the outer end of the insert block. A movable block parallel to the insertion hole is opened inside the cylinder. Radial grooves are symmetrically opened on the inner side of the movable block.

[0013] As a further improvement to the above scheme, a slider is slidably connected in the radial groove, a slide cylinder is fixedly connected in the middle of the slider, the slide cylinder is inserted into the insertion hole, and an inclined abutment surface is provided at the bottom inner side of the slide cylinder. A screw is threadedly connected to the inner wall of one side of the slide cylinder, and a round block is coaxially fixedly connected to the outer end of the screw. The round block is rotatably connected to the movable block, and a knob is coaxially fixedly connected to the outer side of the round block.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] (i) The left and right halves of the mold of this utility model are pre-set with multiple slots in the range of 0°-90° during the manufacturing process. The corresponding slots can be selected according to the test requirements to insert stainless steel sheets. Through the separation effect of stainless steel sheets, the interlayer angle of soft and hard layers is precisely defined. At the same time, the surface of stainless steel sheets is polished. After being pulled out, soft and hard materials can naturally bond to form a clear structural surface, perfectly simulating the layering characteristics of natural soft and hard interlayered rock masses.

[0016] (ii) This utility model realizes the rotation and opening of the left and right molds through the shaft pin, and the mold interior is divided into multiple independent layered areas with the help of the baffle. After filling with soft and hard simulated materials, it can be directly vibrated and compacted without subsequent cutting and processing. Multiple sets of samples can be prepared at one time, and the material density is ensured to be uniform during the vibration process, which solves the problems of cumbersome process and low efficiency of the existing technology.

[0017] (III) The mold in this utility model adopts a left and right split design. When demolding, it is only necessary to unload the clamp and rotate around the shaft pin to separate the two molds to take out the sample. There is no need to forcibly peel it off, which effectively reduces the cost of consumables and repetitive workload in sample preparation and solves the defects of existing technology such as difficult demolding and easy damage to the sample.

[0018] (iv) This utility model can quickly lock the left and right molds of the mold by means of quick disassembly and assembly of the locking mechanism, so as to ensure the stability of the equipment during vibration and improve the quality of the sample rock mass. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of a shear strength test sample preparation device for interbedded soft and hard rock masses proposed in this utility model.

[0020] Figure 2 This utility model Figure 1 A top-view diagram;

[0021] Figure 3 This is a schematic diagram of the bottom structure of this utility model;

[0022] Figure 4 This is a schematic diagram of the structure of the present invention in its unfolded state;

[0023] Figure 5 This utility model Figure 4 A top-view structural diagram;

[0024] Figure 6 This is a schematic diagram of the locking mechanism of this utility model;

[0025] Figure 7 This is a schematic diagram showing the connection state between the screw and the slide of this utility model.

[0026] Explanation of key symbols:

[0027] 1. Left mold; 2. Right mold; 3. Shaft pin; 4. Left baffle; 5. Right baffle; 6. Left slot; 7. Right slot; 8. Stainless steel sheet; 9. Base support; 10. Fixed ring block; 11. Rotary ring; 12. Ring hook; 13. Insertion hole; 14. Insertion block; 15. Cylinder; 16. Movable block; 17. Radial groove; 18. Slide cylinder; 19. Slider; 20. Round block; 21. Screw; 22. Knob; 23. Abutment surface. Detailed Implementation

[0028] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0029] Example:

[0030] Please combine Figures 1-7 This embodiment of a shear strength test specimen preparation device for interbedded soft and hard rock masses includes:

[0031] Left mold 1 and right mold 2, with a shaft pin 3 at the connection point on the same side of the left mold 1 and right mold 2 to realize the hinged rotation of the left mold 1 and right mold 2. After the left mold 1 and right mold 2 are closed, they form a placement space. A vibrator is connected outside the placement space. A locking mechanism is provided on the other side of the left mold 1 and right mold 2.

[0032] The locking mechanism is used to maintain stability after the left mold 1 and right mold 2 are closed, in conjunction with the vibrator operation.

[0033] See Figures 1-3 This is the mold-closed state of this application. Figure 4 and Figure 5 In the mold-opening state of this application, the required materials can be placed in different placement spaces. Then, with the help of a vibrator, the materials in the placement space can be quickly transported and the rock mass can be waited for to form. After that, the locking mechanism can be released, and the mold can be opened by using the hinge of the left mold 1 and the right mold 2 to easily and quickly remove the sample rock mass.

[0034] See Figure 4 and Figure 5 The left mold 1 and the right mold 2 are connected by matching inserts and slots.

[0035] The placement space includes multiple left baffles 4 and right baffles 5 that are symmetrically, horizontally and uniformly fixed to the left mold 1 and the right mold 2 respectively. Multiple vibration spaces are formed by several sets of matching left baffles 4 and right baffles 5. Multiple inclined wire insertion slots are uniformly opened in each vibration space. The wire insertion slots are formed by matching left slots 6 and right slots 7.

[0036] The tilt angle of each socket is different, and a stainless steel plate 8 is inserted into each socket.

[0037] See Figure 1 , Figure 2 , Figure 4 and Figure 5 By using the stable and fitted left baffle 4 and right baffle 5 and placing a stainless steel sheet 8 in them, a vibration space tilted at different angles can be achieved, which is then used in conjunction with a vibrator (not shown) to homogenize the space.

[0038] Furthermore, the vibrator is a standard existing device, and no specific model is specified here.

[0039] Both the left mold 1 and the right mold 2 are equipped with base supports 9 at their bottom ends.

[0040] See Figure 3It is used to ensure the stability of the chassis of the left mold 1 and the right mold 2. The ground needs to be leveled before placing the left mold 1 and the right mold 2.

[0041] The locking mechanism includes a fixed ring block 10 fixedly connected to the outer wall of the left mold 1, a rotating ring 11 rotatably connected to the fixed ring block 10, a bent hook 12 fixedly connected to the outer end of the rotating ring 11, and a through hole 13 opened at the hook 12.

[0042] See Figure 6 and Figure 7 With the hook 12 bent, rotating along the fixing ring block 10 ensures that the hook 12 is inserted and connected facing downwards.

[0043] The locking mechanism also includes an insert block 14 fixedly connected to the outer wall of the right mold 2. The middle part of the insert block 14 is hollowed out and inserted into the ring hook 12. A cylinder 15 is fixedly connected to the middle of the outer end of the insert block 14. A movable block 16 parallel to the insertion hole 13 is opened inside the cylinder 15. Radial grooves 17 are symmetrically opened on the inner side of the movable block 16.

[0044] See Figure 6 and Figure 7 An arc-shaped protrusion is provided at the contact point between the hollow area of ​​the insert block 14 and the hook 12 to accommodate the sliding of the hook 12, so that the hook 12 can be inserted into the insert block 14.

[0045] A slider 19 is slidably connected inside the radial groove 17. A slide cylinder 18 is fixedly connected to the middle of the slider 19. The slide cylinder 18 is inserted into the insertion hole 13. An inclined abutment surface 23 is provided at the bottom inner side of the slide cylinder 18. A screw 21 is threadedly connected to the inner wall of one side of the slide cylinder 18. A round block 20 is coaxially fixedly connected to the outer end of the screw 21. The round block 20 is rotatably connected to the movable block 16. A knob 22 is coaxially fixedly connected to the outer side of the round block 20.

[0046] See Figure 6 and Figure 7 The rotatable knob 22 can only be rotated within the movable block 16. Through the screw 21 and the threaded connection of the slide cylinder 18, the entire slide cylinder 18 is driven to abut the contact surface 23 and the insertion hole 13. After the slide cylinder 18 is fully inserted into the insertion hole 13, it ensures a stable connection between the left mold 1 and the right mold 2.

[0047] The implementation principle of the shear strength sample preparation device for interbedded soft and hard rock masses in this application embodiment is as follows:

[0048] The ground is leveled, and then the left mold 1 and the right mold 2 are flipped and closed by the connection of the shaft pin 3.

[0049] After the mold is closed, the ring hook 12 is inserted into the insert block 14 by rotating the rotating ring 11. Then, the knob 22 is rotated to drive the slide cylinder 18 to be gradually inserted into the insertion hole 13, ensuring the stability of the connection limit between the left mold 1 and the right mold 2.

[0050] Smoothly polished stainless steel sheets 8 are inserted into the corresponding left slot 6 and right slot 7, and rock material can be placed in the separated space. The vibrator is started and connected to the equipment to accelerate the homogenization of the material inside the equipment and release internal air bubbles.

[0051] After the sample rock mass has been formed, the limiting connection of the ring hook 12 can be released first, and then the stainless steel plate 8 inserted therein can be removed. Finally, the left mold 1 / right mold 2 can be flipped to demold the sample rock mass.

[0052] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. A device for preparing shear strength test specimens of interbedded soft and hard rock masses, characterized in that, include: Left mold (1) and right mold (2), the left mold (1) and right mold (2) are connected on the same side with a shaft pin (3) to realize the hinged rotation of the left mold (1) and right mold (2). After the left mold (1) and right mold (2) are closed, they form a placement space. A vibrator is connected outside the placement space. A locking mechanism is provided on the other side of the left mold (1) and right mold (2). The locking mechanism is used to maintain its own stability after the left mold (1) and the right mold (2) are closed and work together with the vibrator.

2. The apparatus for preparing shear strength test specimens of interbedded soft and hard rock masses as described in claim 1, characterized in that, The placement space includes multiple left baffles (4) and right baffles (5) that are symmetrically and horizontally fixedly connected to the left mold (1) and the right mold (2) respectively. Multiple vibration spaces are formed in sequence by several sets of matching left baffles (4) and right baffles (5). Multiple inclined wire slots are opened in sequence in each vibration space. The wire slots are formed by matching left slots (6) and right slots (7).

3. The shear strength test specimen preparation device for interbedded soft and hard rock masses as described in claim 2, characterized in that, The tilt angle of each of the aforementioned sockets is different, and a stainless steel plate (8) is inserted into each socket.

4. The apparatus for preparing shear strength test specimens of interbedded soft and hard rock masses as described in claim 2, characterized in that, Both the left mold (1) and the right mold (2) are provided with base supports (9) at their bottom ends.

5. The apparatus for preparing shear strength test specimens of interbedded soft and hard rock masses as described in claim 1, characterized in that, The locking mechanism includes a fixed ring block (10) fixedly connected to the outer wall of the left mold (1), a rotating ring (11) is rotatably connected to the fixed ring block (10), a bent hook (12) is fixedly connected to the outer end of the rotating ring (11), and a through hole (13) is opened at the hook (12).

6. The apparatus for preparing shear strength test specimens of interbedded soft and hard rock masses as described in claim 5, characterized in that, The locking mechanism also includes a plug (14) fixedly connected to the outer wall of the right mold (2). The middle part of the plug (14) is hollowed out and inserted into the ring hook (12). A cylinder (15) is fixedly connected to the middle of the outer end of the plug (14). A movable block (16) parallel to the insertion hole (13) is opened inside the cylinder (15). Radial grooves (17) are symmetrically opened on the inner side of the movable block (16).

7. The apparatus for preparing shear strength test specimens of interbedded soft and hard rock masses as described in claim 6, characterized in that, A slider (19) is slidably connected in the radial groove (17). A slide cylinder (18) is fixedly connected in the middle of the slider (19). The slide cylinder (18) is inserted into the insertion hole (13). An inclined abutment surface (23) is provided at the bottom inner side of the slide cylinder (18). A screw (21) is threadedly connected to the inner wall of one side of the slide cylinder (18). A round block (20) is coaxially fixedly connected to the outer end of the screw (21). The round block (20) is rotatably connected to the movable block (16). A knob (22) is coaxially fixedly connected to the outer side of the round block (20).

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