A fractured rock mass slurry diffusion simulation experimental system

Abstract

The present invention discloses a broken rock mass slurry diffusion simulation experiment system, comprising a base, at least two boxes are arranged on the upper side of the base, through holes are arranged on the side of the boxes, a rotating table is arranged in the middle of the upper side of the base, a cross bar is fixedly connected to the upper side of the rotating table, a filling device is arranged at one end of the cross bar, and a pressurizing device is arranged at the other end of the cross bar, the filling device comprises a slide seat, a lifting platform is arranged on one side of the slide seat, and the lifting platform is vertically slidably connected to a first support rod and a second support rod; a casing is arranged at the lower end of the first support rod, crushed stone is stored in the casing, the filling material is filled in layers in the box, and a detection sensor is buried in the box; a pressing plate is arranged at the lower end of the second support rod, and the pressing plate is arranged corresponding to the inner cavity of the casing. The present invention performs a grouting improvement test through at least two boxes, performs drilling grouting at different positions and depths according to the position of the crushed stone rock mass, verifies the difficulty of grouting diffusion and the reinforcement effect on the crushed stone rock mass, and plays a role in facilitating comparison.

Description

Technical Field

[0001] The invention relates to the technical field of rock mass grouting tests, and in particular to a broken rock mass grout diffusion simulation test system. Background Art

[0002] Under the action of excavation unloading, the joints and cracks inside the rock mass are easy to expand and penetrate to form broken rock mass, which leads to rock mass instability and damage, thus affecting the stability of the project. Grouting technology can effectively repair and reinforce these broken rock masses, improve the stress state of the surrounding rock, and improve the stability of the surrounding rock. Therefore, the broken rock mass grouting technology is of great significance for controlling the stability of the surrounding rock and ensuring construction safety.

[0003] The actual broken rock mass is located deep underground. The burial method of the existing grouting test equipment makes the broken rock mass poorly aggregated, and the buried body structure formed is single, which is not convenient for evaluating the grouting reinforcement measures, strategies, grouting diffusion mechanism and reinforcement effect. Summary of the invention

[0004] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a broken rock mass slurry diffusion simulation experimental system, which solves the technical problem of the single structure of the existing simulation specimens.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A fractured rock mass slurry diffusion simulation experimental system comprises a base, at least two boxes are arranged on the upper side of the base, through holes are arranged on the side of the boxes, a rotating platform is arranged in the middle of the upper side of the base, a cross bar is fixedly connected to the upper side of the rotating platform, a filling device is arranged at one end of the cross bar, and a pressurizing device is arranged at the other end of the cross bar, the filling device comprises a slide seat, a lifting platform is arranged on one side of the slide seat, and the lifting platform is vertically slidably connected to a first support rod and a second support rod;

[0007] A casing is provided at the lower end of the first support rod, gravel is stored in the casing, fillers are filled in layers in the box, and a detection sensor is buried in the box;

[0008] A pressing plate is arranged at the lower end of the second support rod, and the pressing plate is arranged corresponding to the inner cavity of the sleeve.

[0009] Preferably, the bottom of the lifting platform is fixedly connected to an electric push rod, the telescopic end of the electric push rod is fixedly connected to the first support rod, the bottom of the lifting platform is rotatably connected to the reversing gear, one side of the first support rod is fixedly connected to the first tooth plate, one side of the second support rod is fixedly connected to the second tooth plate, the first tooth plate is meshed on one side of the reversing gear, and the second tooth plate is meshed on the other side of the reversing gear.

[0010] Preferably, the outer side of the sleeve is fixedly connected to a bracket, the bracket is slidably connected to a slide rod, the upper end of the slide rod is fixedly connected to two inclined plates, and a support spring is fixedly connected between the two inclined plates and the bracket.

[0011] Preferably, the bottom of the second support rod is rotatably connected to the swing rod, and the two ends of the bottom of the swing rod are respectively fixedly connected to a pressure rod, and the pressure rods are arranged in a one-to-one correspondence with the inclined plates. The lower end of the first support rod is rotatably connected to the lower end of the outer wall of the sleeve and a reset torsion spring is arranged;

[0012] The side surface of the second support rod is axially slidingly connected to the push tube, and the first spring is fixedly connected between the push tube and the side surface of the second support rod, a spiral groove is arranged on the inner wall of the push tube, and a ball is arranged on the outer wall of the rotating shaft of the swing rod, and the ball is limited and rolled in the spiral groove, one side of the first support rod is fixedly connected to the corrugated plate, and one end of the push tube is rotatably connected to the roller, and the roller is pressed and contacted on the corrugated plate.

[0013] Preferably, the sleeve is a round tube, a square tube or a tube with a different cross-section.

[0014] Preferably, an arc-shaped slide groove is provided on the side of the box body, an arc-shaped slider is slidably connected in the arc-shaped slide groove, and a positioning hole is provided on the arc-shaped slider.

[0015] The advantages of the present invention are as follows: a crushed rock mass slurry diffusion simulation experimental system provided by the present invention is gradually raised through the casing, while the pressure plate is pushed down relative to the casing in the casing, the casing is first protected on the outside of the crushed rock mass, and as the casing is gradually pulled out, a cavity is formed in the filled ordinary surrounding rock, and the crushed rock mass is pushed out of the casing, which is convenient for the centralized burial of the crushed rock mass, and after the crushed rock mass is completely pushed out, the casing and the pressure plate are removed, and the ordinary surrounding rock continues to fill and fully cover the box, which is then compacted, thereby preparing a sample with a local crushed rock mass, and filling to obtain at least two boxes. When the at least two boxes are subjected to grouting improvement tests, drilling and grouting are performed at different positions and depths according to the position of the crushed rock mass to verify the difficulty of grouting diffusion and the reinforcement effect on the crushed rock mass, which facilitates comparison.

[0016] When the pressure plate of the present invention pushes the gravel rock mass in the casing, that is, the roller rolls relative to the wavy plate, the push tube moves along the rotating shaft of the swing arm due to the undulating effect of the wavy plate, and the push tube does not rotate. Due to the displacement movement of the spiral groove, the ball will inevitably form a deflection effect with the rotating shaft of the swing arm, thereby realizing the swing of the swing arm. The swing of the swing arm forms an oblique push on the inclined plate on one side through the pressure rod, thereby deflecting the casing. The rotating position of the casing is located at the lower end, which has the smallest effect on the lateral push of the ordinary surrounding rock filling on the periphery. The ordinary surrounding rock at the bottom and the periphery is not compacted, which is convenient for the extrusion of the gravel rock mass. Moreover, due to the change in the direction of the casing, the gravel rock mass can form a filling of the casing inner cavity structure in the ordinary surrounding rock, and the edge irregularly protrudes outward, so it is easy to obtain various regular gravel rock masses through adjustment, which is convenient for experimental research. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1It is a basic structural schematic diagram of the present invention;

[0018] Figure 2 It is a schematic structural diagram of the packing device of the present invention;

[0019] Figure 3 It is a schematic diagram of the swing structure of the sleeve of the present invention;

[0020] Figure 4 It is a schematic diagram of the landfill state of the gravel rock mass of the present invention. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. Example 1

[0022] like Figures 1 to 4 As shown, a fractured rock mass slurry diffusion simulation experimental system provided by the present invention comprises a base 1, at least two boxes 11 are arranged on the upper side of the base 1, through holes 12 are arranged on the side of the boxes 11, a rotating platform 16 is arranged in the middle of the upper side of the base 1, a cross bar 17 is fixedly connected to the upper side of the rotating platform 16, a filling device 2 is arranged at one end of the cross bar 17, and a pressurizing device 4 is arranged at the other end of the cross bar 17, such as a hydraulic rod having a lower end fixedly connected to an extrusion plate, the cross bar 17 rotates to change its position, and a filling or pressurizing test can be performed on the corresponding box 11, the filling device 2 comprises a slide 21, a lifting platform 22 is arranged on one side of the slide 21, and the lifting platform 22 is vertically slidably connected to a first support rod 23 and a second support rod 24;

[0023] A casing 25 is provided at the lower end of the first support rod 23, and crushed stones are stored in the casing 25. Ordinary surrounding rocks 10 are filled in layers in the box 11. The ordinary surrounding rocks 10 use cement and vaseline as binders, sand, barite powder and talcum powder as aggregates, and silicone oil as a regulator to prepare low-slump mixed granular materials, which are convenient for placement and subsequent compaction. The ordinary surrounding rocks 10 are configured by adjusting the ratio of similar materials to each other, and are placed in the box 11 in batches before premixing and cementing to avoid filling the gaps between the crushed stones. Detection sensors are buried in the box 11. The detection sensors use conventional monitoring elements such as optical fiber sensors and strain gauges, and the corresponding buried positions are adopted according to specific test requirements;

[0024] A pressing plate 26 is disposed at the lower end of the second support rod 24 . The pressing plate 26 is disposed corresponding to the inner cavity of the sleeve 25 . The sleeve 25 is a round tube, a square tube or a tube with a different cross section.

[0025] An arc-shaped slide groove 13 is arranged on the side of the box body 11, and an arc-shaped slider 14 is slidably connected in the arc-shaped slide groove 13. The arc-shaped slider 14 is provided with a positioning hole 15. The positioning hole 15 and the through hole 12 are first blocked with a plug. After the soil in the box body 11 is compacted, a gravel rock mass 20 is formed. The arc-shaped slider 14 adjusts its position, and a water supply pipe is inserted after horizontal drilling. A drainage hole is arranged on the side of the water supply pipe close to the gravel rock mass 20. Grouting is carried out in different directions in the gravel rock mass 20 to test the reinforcement effect of the diffusion of the slurry on the gravel rock mass 20, so as to verify and improve the grouting process (fluidity, composition, grouting position). A tunnel is formed by excavating the through hole 12 to test whether leakage, pipe gushing, deformation and other hazards are formed in the tunnel.

[0026] The present invention sets up at least two boxes 11, and the samples are filled in at least two boxes 11 under the same conditions. During the filling process, ordinary surrounding rock 10 is first laid on the bottom of the box 11 to form a base layer, and the lifting platform 22 descends until the casing 25 contacts the top surface of the base layer, and then crushed stone is placed in the casing 25 to simulate the crushed stone rock mass 20.

[0027] The crushed rock mass 20 is placed and filled synchronously with the ordinary surrounding rock 10. While the casing 25 is gradually raised, the pressure plate 26 is pushed down relative to the casing 25 in the casing 25. The casing 25 is first protected outside the crushed rock mass 20. As the casing 25 is gradually withdrawn, a cavity is formed in the filled ordinary surrounding rock 10, and the crushed rock mass 20 is pushed out of the casing 25, which is convenient for the centralized burial of the crushed rock mass 20. After the crushed rock mass 20 is completely pushed out, the casing 25 and the pressure plate 26 are removed, and the ordinary surrounding rock 10 continues to fill and fully covers the box 11, which is then compacted to prepare a sample with a local crushed rock mass 20. At least two boxes 11 are filled to obtain. When the at least two boxes 11 are subjected to the grouting improvement test, drilling and grouting are carried out at different positions and depths according to the position of the crushed rock mass 20 to verify the difficulty of grouting diffusion and the reinforcement effect on the crushed rock mass 20, which plays the role of a comparative test. Example 2

[0028] like Figures 1 to 4 As shown, the bottom of the lifting platform 22 is fixedly connected to the electric push rod 27, the telescopic end of the electric push rod 27 is fixedly connected to the first support rod 23, the bottom of the lifting platform 22 is rotatably connected to the reversing gear 28, one side of the first support rod 23 is fixedly connected to the first tooth plate 231, and one side of the second support rod 24 is fixedly connected to the second tooth plate 241. The first tooth plate 231 is meshed on one side of the reversing gear 28, and the second tooth plate 241 is meshed on the other side of the reversing gear 28.

[0029] In Example 2, when the electric push rod 27 brings the first support rod 23 up, the second support rod 24 is lowered through the action of the gear set, that is, the casing 25 is raised, and the pressure plate 26 is pushed down relative to the casing 25 in the casing 25, cooperating with the laying of the outer ordinary surrounding rock 10, so as to quickly form a simulation sample. Example 3

[0030] like Figures 1 to 4 As shown, the outer side of the sleeve 25 is fixedly connected to the bracket 3, the bracket 3 is slidably connected to the slide rod 31, the upper end of the slide rod 31 is fixedly connected to two inclined plates 32, and the support spring 33 is fixedly connected between the two inclined plates 32 and the bracket 3.

[0031] The bottom of the second support rod 24 is rotatably connected to the swing rod 34, and the two ends of the bottom of the swing rod 34 are respectively fixedly connected to a pressure rod 35 through threads, and the pressure rod 35 is arranged one-to-one with the inclined plate 32. The lower end of the first support rod 23 is rotatably connected to the lower end of the outer wall of the sleeve 25 and a reset torsion spring is arranged;

[0032] The side of the second support rod 24 is axially slidably connected to the push tube 37, and the first spring 36 is fixedly connected between the push tube 37 and the side of the second support rod 24. A spiral groove is set on the inner wall of the push tube 37, and a ball is set on the outer wall of the rotating shaft of the swing rod 34. The ball is limited and rolls in the spiral groove. One side of the first support rod 23 is fixedly connected to the wavy plate 38, and one end of the push tube 37 is rotatably connected to the roller 39, and the roller 39 is pressed and contacted on the wavy plate 38.

[0033] When the pressing plate 26 of the present invention pushes out the gravel rock mass 20 in the casing 25, the roller 39 rolls relative to the wavy plate 38. Due to the undulating effect of the wavy plate 38, the push tube 37 moves along the rotating shaft of the swing rod 34, and the push tube 37 does not rotate. Due to the displacement of the spiral groove, the ball bearing will inevitably form a deflection effect with the rotating shaft of the swing rod 34, thereby realizing the swing of the swing rod 34. The swing of the swing rod 34 forms an oblique push on the inclined plate 32 on one side through the pressing rod 35, thereby deflecting the casing 25. The rotating position of the casing 25 is located at the lower end, which has the least effect on the lateral push of the ordinary surrounding rock 10 filled at the periphery. The ordinary surrounding rock 10 at the bottom and the periphery is not compacted, which is convenient for the crushed rock mass 20 to be squeezed out. Moreover, due to the change in the direction of the casing 25, the crushed rock mass 20 can form the filling of the inner cavity structure of the casing 25 in the ordinary surrounding rock 10, and the edge irregularly protrudes outward, so it is easy to obtain various regular crushed rock masses 20 through adjustment, thereby facilitating experimental research.

[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A fractured rock mass slurry diffusion simulation experimental system, comprising a base (1), at least two boxes (11) are arranged on the upper side of the base (1), through holes (12) are arranged on the side of the boxes (11), a rotating platform (16) is arranged in the middle of the upper side of the base (1), a cross bar (17) is fixedly connected to the upper side of the rotating platform (16), a filling device (2) is arranged at one end of the cross bar (17), and a pressure device (4) is arranged at the other end of the cross bar (17), characterized in that: The filling device (2) comprises a slide seat (21), a lifting platform (22) is provided on one side of the slide seat (21), and the lifting platform (22) is vertically slidably connected to the first support rod (23) and the second support rod (24); A casing (25) is provided at the lower end of the first support rod (23), crushed stones are stored in the casing (25), ordinary surrounding rocks (10) are filled in layers in the box (11), and a detection sensor is buried in the box (11); A pressing plate (26) is disposed at the lower end of the second support rod (24), and the pressing plate (26) is disposed corresponding to the inner cavity of the sleeve (25); The outer side of the sleeve (25) is fixedly connected to the bracket (3), the bracket (3) is slidably connected to the slide rod (31), the upper end of the slide rod (31) is fixedly connected to two inclined plates (32), and a support spring (33) is fixedly connected between the two inclined plates (32) and the bracket (3); The bottom of the second support rod (24) is rotatably connected to a swing rod (34), and the two ends of the bottom of the swing rod (34) are respectively fixedly connected to a pressure rod (35), and the pressure rods (35) are arranged in a one-to-one correspondence with the inclined plates (32). The lower end of the first support rod (23) is rotatably connected to the lower end of the outer wall of the sleeve (25) and a reset torsion spring is arranged. The side surface of the second support rod (24) is axially slidably connected to a push tube (37), and a first spring (36) is fixedly connected between the push tube (37) and the side surface of the second support rod (24). A spiral groove is arranged on the inner wall of the push tube (37), and a ball is arranged on the outer wall of the rotating shaft of the swing rod (34). The ball is limited and rolls in the spiral groove. One side of the first support rod (23) is fixedly connected to a wavy plate (38), and one end of the push tube (37) is rotatably connected to a roller (39), and the roller (39) is pressed and contacted on the wavy plate (38).

2. A broken rock mass slurry diffusion simulation experimental system according to claim 1, characterized in that: The bottom of the lifting platform (22) is fixedly connected to an electric push rod (27), the telescopic end of the electric push rod (27) is fixedly connected to the first support rod (23), the bottom of the lifting platform (22) is rotatably connected to a reversing gear (28), one side of the first support rod (23) is fixedly connected to a first toothed plate (231), one side of the second support rod (24) is fixedly connected to a second toothed plate (241), the first toothed plate (231) is meshed with one side of the reversing gear (28), and the second toothed plate (241) is meshed with the other side of the reversing gear (28).

3. The broken rock slurry diffusion simulation experimental system according to claim 1 is characterized by: The sleeve (25) is in the form of a round tube, a square tube or a tube with a different cross section.

4. The broken rock slurry diffusion simulation experimental system according to claim 1 is characterized by: An arc-shaped slide groove (13) is provided on the side of the box body (11), and an arc-shaped slide block (14) is slidably connected in the arc-shaped slide groove (13), and a positioning hole (15) is provided on the arc-shaped slide block (14).

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