Hydraulic type large triaxial test sample preparation device for soil-rock mixture

Abstract

The utility model discloses a hydraulic type earth-rock mixture large-scale triaxial test sample preparation device which comprises a triaxial compression tester, a test area of the triaxial compression tester is communicated with a test area of an axial hydraulic system through a track, and a movable sample preparation device table is installed on the track in a sliding mode. A sample preparation protection sleeve, a latex film and a film bearing cylinder are coaxially and sequentially arranged on the movable sample preparation device table from inside to outside; the axial hydraulic system comprises a hydraulic compressor with a vertically downward output end, a hydraulic hammer is arranged at the output end of the hydraulic compressor, a laser range finder is arranged on one side of the output end of the hydraulic compressor, an induction end of the laser range finder is in induction fit with the hydraulic hammer, and the laser range finder is in linkage fit with the hydraulic compressor; hydraulic rods with vertically downward output ends are arranged on the two sides of the output end of the hydraulic compression instrument, and the tail ends of the hydraulic rods are detachably and fixedly mounted on the top of the sample preparation protection sleeve, so that the success of sample preparation and test is ensured, and a triaxial test is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of geotechnical engineering equipment, in particular to a hydraulic type soil-rock mixture large-scale triaxial test sample preparation device. Background Art

[0002] The shear mechanical properties of soil-rock mixtures are the key to accurately evaluate the stability of such landslides, and indoor large-scale triaxial tests are an important means to accurately measure the shear strength parameters of soil-rock mixtures. The existing large-scale triaxial testers for soil-rock mixtures mainly have two methods in the sample preparation process: compaction method and vibration method. The existing compaction method has the following defects:

[0003] (1) The equipment usually uses a hammer to manually compact the samples in layers. Since the size of the hammer is usually only 1 / 3 of the sample diameter, the compaction process often results in a denser middle and looser edges, resulting in uneven sample density.

[0004] (2) If the impact force is too small during the sample preparation process, it is difficult to achieve the sample density requirement. If the impact force is too large, it will often cause the wrapped latex film to be damaged, resulting in sample preparation failure. The existing vibration method generally places a vibration table under the sample to achieve a certain density of the sample through high-frequency vibration, but it has the following defects;

[0005] (3) For samples with a certain moisture content, it is difficult to prepare the samples to a certain density by vibration.

[0006] Therefore, in view of the defects of the above-mentioned existing equipment, it is still necessary to design a hydraulic soil-rock mixture large-scale triaxial test sample preparation device, which can conveniently and efficiently prepare soil-rock mixture samples with a certain moisture content evenly, and effectively protect the integrity of the latex film during the preparation process, thereby reducing the test cost. Utility Model Content

[0007] The utility model provides a hydraulic soil-rock mixture large-scale triaxial test sample preparation device, aiming to solve the problems of unsatisfactory sample density and uniformity due to manual compaction in the triaxial sample preparation device in the above-mentioned prior art, unsatisfactory test failure due to the protection of the latex film, and inaccurate layered filling type measurement.

[0008] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0009] A hydraulic soil-rock mixture large-scale triaxial test sample preparation device, comprising a triaxial compression tester, wherein the test area of ​​the triaxial compression tester is connected with the test area of ​​the axial hydraulic system through a track, a movable sample preparation device table is slidably mounted on the track, and a sample preparation protection sleeve, a latex film and a film bearing cylinder are coaxially arranged in sequence from the inside to the outside;

[0010] The axial hydraulic system includes a hydraulic compressor with an output end facing vertically downward, a hydraulic hammer is fixedly installed concentrically and coaxially at the bottom of the output end of the hydraulic compressor, the hydraulic hammer is detachably embedded in the sample preparation protection sleeve, and the bottom of the hydraulic hammer forms a compaction fit with the sample in the sample preparation protection sleeve, a laser rangefinder is provided on one side of the output end of the hydraulic compressor, the sensing end of the laser rangefinder forms an inductive fit with the hydraulic hammer, and the laser rangefinder forms a linkage fit with the hydraulic compressor, hydraulic rods with the output end facing vertically downward are provided on both sides of the output end of the hydraulic compressor, and the ends of the hydraulic rods are detachably fixedly installed on the top of the sample preparation protection sleeve.

[0011] Preferably, the sensing end of the laser rangefinder is vertically facing downward, and the laser rangefinder is linked with the hydraulic compressor through an external controller.

[0012] Preferably, the hydraulic rods are symmetrical about the hydraulic hammer, and the spacing between the hydraulic rods is greater than the maximum diameter of the hydraulic hammer.

[0013] As a more preferred embodiment, the output end of the hydraulic rod is installed with the top of the sample preparation protection sleeve through a detachable bolt to form a linkage fit.

[0014] Preferably, when the movable sample preparation device table moves to the end of the track close to the axial hydraulic system, the movable sample preparation device table is located just below the hydraulic hammer;

[0015] When the movable sample preparation device stage moves to the end of the track close to the triaxial compression tester, the movable sample preparation device stage is located just below the extrusion end of the triaxial compression tester.

[0016] Preferably, the movable sample preparation device table includes a sample preparation table, which includes a base and a protrusion arranged coaxially, and the base and the protrusion cooperate to form a boss structure, and the sample preparation protection sleeve, latex film and film supporting tube are coaxially arranged on the protrusion in sequence from the inside to the outside, and a total of four rollers are provided at the bottom of the base, which are symmetrical in pairs about the middle position of the base, and the four rollers correspond to the tracks one by one, respectively, and the base rolls along the corresponding tracks through the rollers to form a sliding fit with the tracks.

[0017] As a more preferred embodiment, the bottom of the latex film is coaxially sleeved on the protrusion of the sample preparation table, and the bottom of the latex film is pressed fit with the protrusion through a stainless steel hoop, the outer side of the latex film is coaxially sleeved with a film-receiving tube, and the outer wall of the latex film is tightly attached to the inner wall of the film-receiving tube, the bottom of the film-receiving tube is pressed fit with the protrusion through an axially arranged detachable screw, and the inner side of the latex membrane is coaxially and detachably embedded with a sample preparation protection sleeve, the outer wall of the sample preparation protection sleeve is tightly attached to the inner wall of the latex film, and the bottom of the sample preparation protection sleeve is received on the protrusion.

[0018] Furthermore, the top of the latex film is higher than the top of the film-holding tube. When preparing the sample, the top of the latex film is turned outward to form a sleeve fit with the top of the film-holding tube.

[0019] When the sample preparation is completed, the top of the latex film is arranged vertically, and the top of the latex film cooperates with the top surface of the sample to form a mounting groove, an upper hole pressure plate is embedded in the mounting groove, and the upper hole pressure plate is supported on the top surface of the sample, and the inner wall of the latex film is sleeved and fitted with the side wall of the upper hole pressure plate to form a tight fit through a stainless steel hoop.

[0020] Furthermore, a lower hole pressure valve is provided on one side of the base of the sample preparation table, one end of the lower hole pressure valve passes through the base and the protrusion and is connected with the inside of the membrane supporting cylinder, and the output end of the vacuum pump provided on one side of the axial hydraulic system is connected and cooperated with the other end of the lower hole pressure valve through a connecting pipe.

[0021] Beneficial effects of the utility model:

[0022] (1) The hydraulic hammer of the utility model is larger than the hammer of the traditional manual compactor, so when the sample is filled in layers, each layer of the sample can be prepared more evenly;

[0023] (2) The sample preparation protection sleeve designed in the utility model can effectively ensure the integrity of the latex film during the sample preparation process;

[0024] (3) The hydraulic soil-rock mixture large triaxial test sample preparation device can not only prepare samples with lower water content or lower density that can be prepared by traditional vibration sample preparation devices, but also prepare soil-rock mixtures with higher water content into triaxial samples with higher density. It has wider engineering applicability. At the same time, this device and sample preparation method can be promoted and applied to the preparation of rockfill materials, coarse-grained soil and other rock and soil materials, and has strong promotion and practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of the sample preparation device of the utility model;

[0026] Figure 2 This is a schematic diagram of the test installation of the utility model;

[0027] Figure 3 It is a cross-sectional schematic diagram of the inside of the film-bearing cylinder during sample preparation of the utility model;

[0028] Figure 4 It is a cross-sectional schematic diagram of the inside of the film holding cylinder after sample preparation of the utility model is completed;

[0029] In the figure: 1, axial hydraulic system; 101, hydraulic compressor; 102, hydraulic rod; 103, hydraulic hammer;

[0030] 2. Laser rangefinder; 3. Sample protection sleeve; 4. Latex film; 5. Film-bearing tube;

[0031] 6. Movable sample preparation device table; 601. Sample preparation table; 602. Roller; 603. Lower hole pressure valve;

[0032] 7. Vacuum pump; 8. Upper hole pressure plate; 9. Triaxial compression tester; 10. Track. DETAILED DESCRIPTION

[0033] As follows, embodiments are further described with reference to the accompanying drawings.

[0034] like Figure 1~Figure 4 As shown, as a preferred embodiment 1, a hydraulic soil-rock mixture large-scale triaxial test sample preparation device includes a triaxial compression tester 9, the test area of ​​the triaxial compression tester 9 is connected with the test area of ​​the axial hydraulic system 1 through a track 10, a movable sample preparation device table 6 is slidably mounted on the track 10, and a sample preparation protection sleeve 3, a latex film 4 and a film bearing cylinder 5 are coaxially arranged in sequence from the inside to the outside;

[0035] The axial hydraulic system 1 includes a hydraulic compressor 101 with an output end facing vertically downward, a hydraulic hammer 103 is coaxially and concentrically fixedly installed at the bottom of the output end of the hydraulic compressor 101, the hydraulic hammer 103 is detachably embedded in the sample preparation protection sleeve 3, and the bottom of the hydraulic hammer 103 forms a compaction fit with the sample in the sample preparation protection sleeve 3, a laser rangefinder 2 is provided on one side of the output end of the hydraulic compressor 101, the sensing end of the laser rangefinder 2 forms an inductive fit with the hydraulic hammer 103, and the laser rangefinder 2 forms a linkage fit with the hydraulic compressor 101, hydraulic rods 102 with output ends facing vertically downward are provided on both sides of the output end of the hydraulic compressor 101, and the ends of the hydraulic rods 102 are detachably fixedly installed on the top of the sample preparation protection sleeve 3.

[0036] Embodiment 1 provides a hydraulic soil-rock mixture large-scale triaxial test sample preparation device, the device can move the movable sample preparation device table 6 through the track 10, when the movable sample preparation device table 6 is directly below the axial hydraulic system 1, the sample can be prepared, and after the preparation is completed, it can be directly transferred to the triaxial compression tester 9 through the track 10 to perform the triaxial compression test, which is convenient for movement and transfer;

[0037] During the preparation process, the hydraulic compressor 101 drives the hydraulic hammer 103 to perform layered compaction. The hydraulic compressor 101 can control the hydraulic hammer 103 to move accurately at a fixed rate, so that the hydraulic hammer 103 can fill the soil-rock mixture with a certain moisture content more densely and evenly. The laser of the laser rangefinder 2 can just measure the distance between the hammer face of the hydraulic hammer 103 and the laser rangefinder 2, so as to control the layered compaction and improve the self-control. Compared with the hammer of the traditional manual compactor, the hydraulic hammer 103 is larger in size. When the sample is filled in layers, it can ensure that each layer of the sample is prepared more evenly.

[0038] During the preparation process, the sample protection sleeve 3 can effectively protect the integrity of the latex film 4 to avoid damage to the latex film during the sample preparation process. After the preparation is completed, the sample protection sleeve 3 is directly taken out by the hydraulic rod 102 to complete the preparation for subsequent experiments.

[0039] As a preferred embodiment 2, the sensing end of the laser rangefinder 2 is vertically downward, and the laser rangefinder 2 forms a linkage with the hydraulic compressor 101 through an external controller. The laser rangefinder 2 is used to monitor the distance between the hammer face of the hydraulic hammer 103 and the laser rangefinder 2, thereby controlling the downward pressing distance of the hydraulic hammer 103 in linkage, thereby improving the self-control of layered compaction.

[0040] As a preferred embodiment 3, the hydraulic rods 102 are symmetrical about the hydraulic hammer 103, and the distance between the hydraulic rods 102 is greater than the maximum diameter of the hydraulic hammer 103. This ensures that the sample preparation protection sleeve 3 does not conflict with the hydraulic hammer 103 when being extracted.

[0041] As a preferred embodiment 4, the output end of the hydraulic rod 102 is installed with the top of the sample preparation protection sleeve 3 through a detachable bolt to form a linkage match, so as to ensure the firmness of the installation.

[0042] As a preferred embodiment 5, when the movable sample preparation device stage 6 moves to the end of the track 10 close to the axial hydraulic system 1, the movable sample preparation device stage 6 is located just below the hydraulic hammer 103;

[0043] When the movable sample preparation device stage 6 moves to the end of the track 10 close to the triaxial compression tester 9, the movable sample preparation device stage 6 is located just below the extrusion end of the triaxial compression tester 9. For sample preparation and triaxial compression testing, displacement can be performed directly through the track 10.

[0044] As a preferred embodiment 6, the movable sample preparation device table 6 includes a sample preparation table 601, and the sample preparation table 601 includes a base and a protrusion arranged coaxially, and the base and the protrusion cooperate to form a boss structure, and the sample preparation protection sleeve 3, latex film 4 and film supporting tube 5 are coaxially arranged on the protrusion in sequence from the inside to the outside to ensure installation and sample preparation. The bottom of the base is provided with a total of four rollers 602 that are symmetrical about the middle position of the base, and the four rollers 602 correspond to the tracks 10 one by one. The base rolls along the corresponding tracks 10 through the rollers 602 to form a sliding fit with the track 10 for easy movement.

[0045] As a preferred embodiment 7, the bottom of the latex film 4 is coaxially sleeved on the protrusion of the sample preparation table 601, and the bottom of the latex film 4 is pressed and fitted with the protrusion through a stainless steel hoop to ensure that the latex film 4 is firmly installed;

[0046] The outer side of the latex membrane 4 is coaxially sleeved with a membrane tube 5, and the outer wall of the latex membrane 4 is in close contact with the inner wall of the membrane tube 5. The bottom of the membrane tube 5 is pressed and matched with the protrusion through axially arranged removable screws to ensure the firm installation of the membrane tube 5.

[0047] A sample preparation protection sleeve 3 is coaxially and detachably embedded inside the latex film 4. The outer wall of the sample preparation protection sleeve 3 is in close contact with the inner wall of the latex film 4, and the bottom of the sample preparation protection sleeve 3 is supported on the protrusion. It is used to protect the latex film 4 during the sample preparation process and assist in sample preparation. It can be removed from the latex film 4 after the preparation is completed.

[0048] As a preferred embodiment 8, the top of the latex film 4 is higher than the top of the film-holding tube 5. When preparing the sample, the top of the latex film 4 is turned outward to form a sleeve fit with the top of the film-holding tube 5.

[0049] When the sample is prepared, the top of the latex film 4 is arranged vertically, and the top of the latex film 4 cooperates with the top surface of the sample to form a mounting groove, in which an upper hole pressing plate 8 is embedded, and the upper hole pressing plate 8 is supported on the top surface of the sample, and the inner wall of the latex film 4 is sleeved with the side wall of the upper hole pressing plate 8 to form a tight fit through a stainless steel hoop. The upper hole pressing plate 8 can ensure the airtightness of the sample vacuuming and the completion of the subsequent triaxial test, ensuring the use and facilitating the sample preparation.

[0050] As a preferred embodiment 9, the sample protection sleeve 3 has a size of 80 cm in height and an inner diameter of 30 cm, the latex film 4 has a size of 30 cm in inner diameter and 80 cm in length, 10 cm is reserved at the bottom of the latex film 4 and is fixed to the upper side wall of the sample preparation table 601 with a stainless steel hoop, the film holding tube 5 has a size of 31 cm in inner diameter and 70 cm in height, the film holding tube is sleeved on the outside of the latex film 4 and fixed to the lower surface of the sample preparation table 601 with screws, the extra 10 cm at the upper end of the latex film 4 is folded outward and sleeved on the upper end of the outer wall of the film holding tube 5, so that the film holding tube 5 can be fixed on the sample preparation table 601 and the latex film 4 can be fitted with the film holding tube 5 for easy sample preparation.

[0051] As a preferred embodiment 10, the protrusion of the sample preparation table 601 is a stainless steel cylinder with a height of 10 cm and a diameter of 30 cm, and the base is a stainless steel cylinder with a height of 10 cm and a diameter of 60 cm.

[0052] As a preferred embodiment 11, the upper hole pressing plate 8 is a stainless steel cylinder with a height of 10 cm and a diameter of 30 cm.

[0053] As a preferred embodiment 12, a lower hole pressure valve 603 is provided on one side of the base of the sample preparation table 601, and one end of the lower hole pressure valve 603 passes through the base and the protrusion and is connected with the inside of the membrane supporting tube 5. The output end of the vacuum pump 7 arranged on one side of the axial hydraulic system 1 is connected and cooperated with the other end of the lower hole pressure valve 603 through a connecting pipe, and is used to vacuum the sample. The vacuum is stable after the test filling is completed.

[0054] As a preferred embodiment 13, a method for preparing a sample for a hydraulic soil-rock mixture large-scale triaxial test is provided, the method being implemented by using the above-mentioned sample preparation device, and the method comprising the following steps:

[0055] S1, place the movable sample preparation device table 6 on the track 10, fix the latex film 4 on the protrusion of the sample preparation table 601 with a stainless steel hoop, cover the film holding tube 5 on the outside of the latex film 4 and fix it on the protrusion of the sample preparation table 601 with screws, fold the extra 10 cm of the upper end of the latex film 5 outward and cover the upper end of the film holding tube 5, and push the movable sample preparation device table 6 to the bottom of the hydraulic compressor 101;

[0056] S2, apply lubricating oil inside and outside the sample preparation protection sleeve 3, put the sample preparation protection sleeve 3 into the film receiving cylinder 5 with the latex film through the hydraulic rods 102 on both sides, put the water-permeable plate into the surface of the upper part of the protrusion of the sample preparation table 601 in the sample preparation protection sleeve, and then put the sample into the sample preparation sleeve 3;

[0057] S3, control the hydraulic hammer 103 through the hydraulic compressor 101 to compact the sample in layers, turn on the laser rangefinder 2, read the laser rangefinder 2, and after the sample is pressed to the target height, lift the hydraulic hammer 103 to scrape the surface of each layer of the sample;

[0058] S4, repeat the above steps until the sample is filled and compacted, the hydraulic hammer 103 is not lifted, fixed on the upper surface of the sample, the sample protection sleeve 3 is pulled out through the hydraulic rods 102 on both sides, and then the hydraulic hammer 103 is lifted, the upper hole pressing plate 8 is covered on the upper surface of the sample, the latex film 4 on the upper end of the outer wall of the film bearing cylinder 5 is covered on the outer wall of the upper hole pressing plate 8 and fixed with a stainless steel hoop, and then the vacuum pump 7 is turned on to vacuum the sample. When the sample is stable, the film bearing cylinder 5 is removed and the soil-rock mixture filling is completed;

[0059] S5. After the sample is prepared, the movable sample preparation device table 6 is pushed to the test area of ​​the triaxial compression tester 9 to complete the triaxial compression test.

[0060] The working principle of this utility model:

[0061] The utility model provides a hydraulic soil-rock mixture large triaxial test sample preparation device, the device can move a movable sample preparation device table 6 through a track 10, when the movable sample preparation device table 6 is directly below the axial hydraulic system 1, the sample can be prepared, and after the preparation is completed, it can be directly transferred to the triaxial compression tester 9 through the track 10 to perform the triaxial compression test, which is convenient for movement and transfer;

[0062] During the preparation process, the hydraulic compressor 101 drives the hydraulic hammer 103 to perform layered compaction. The hydraulic compressor 101 can control the hydraulic hammer 103 to move accurately at a fixed rate, so that the hydraulic hammer 103 can fill the soil-rock mixture with a certain moisture content more densely and evenly. The laser of the laser rangefinder 2 can just measure the distance between the hammer face of the hydraulic hammer 103 and the laser rangefinder 2, so as to control the layered compaction and improve the self-control. Compared with the hammer of the traditional manual compactor, the hydraulic hammer 103 is larger in size. When the sample is filled in layers, it can ensure that each layer of the sample is prepared more evenly.

[0063] During the preparation process, the sample protection sleeve 3 can effectively protect the integrity of the latex film 4 to avoid damage to the latex film during the sample preparation process. After the preparation is completed, the sample protection sleeve 3 is directly taken out by the hydraulic rod 102 to complete the preparation for subsequent experiments.

Claims

1. A hydraulic soil-rock mixture large-scale triaxial test sample preparation device, comprising a triaxial compression tester (9), characterized in that: The test area of ​​the triaxial compression tester (9) is connected to the test area of ​​the axial hydraulic system (1) via a track (10), a movable sample preparation device table (6) is slidably mounted on the track (10), and a sample preparation protection sleeve (3), a latex film (4) and a film support cylinder (5) are coaxially arranged in sequence from the inside to the outside; The axial hydraulic system (1) comprises a hydraulic compressor (101) with an output end facing vertically downwards, a hydraulic hammer (103) being coaxially and fixedly mounted on the bottom of the output end of the hydraulic compressor (101), the hydraulic hammer (103) being detachably embedded in a sample preparation protection sleeve (3), and the bottom of the hydraulic hammer (103) forming a compaction fit with the sample in the sample preparation protection sleeve (3), a laser rangefinder (2) being arranged on one side of the output end of the hydraulic compressor (101), the sensing end of the laser rangefinder (2) forming a sensing fit with the hydraulic hammer (103), and the laser rangefinder (2) forming a linkage fit with the hydraulic compressor (101), and hydraulic rods (102) with output ends facing vertically downwards being arranged on both sides of the output end of the hydraulic compressor (101), and the ends of the hydraulic rods (102) being detachably fixedly mounted on the top of the sample preparation protection sleeve (3).

2. A hydraulic soil-rock mixture large-scale triaxial test sample preparation device according to claim 1, characterized in that: The sensing end of the laser rangefinder (2) is directed vertically downwards, and the laser rangefinder (2) forms a linkage with the hydraulic compressor (101) via an external controller.

3. The large-scale triaxial test sample preparation device for hydraulic soil-rock mixture according to claim 1 is characterized in that: The hydraulic rods (102) are symmetrical with respect to the hydraulic hammer (103), and the spacing between the hydraulic rods (102) is greater than the maximum diameter of the hydraulic hammer (103).

4. A hydraulic soil-rock mixture large-scale triaxial test sample preparation device according to claim 3, characterized in that: The output end of the hydraulic rod (102) is mounted on the top of the sample preparation protection sleeve (3) via a detachable bolt to form a linkage fit.

5. A hydraulic soil-rock mixture large-scale triaxial test sample preparation device according to any one of claims 1 to 4, characterized in that: When the movable sample preparation device platform (6) moves to the end of the track (10) close to the axial hydraulic system (1), the movable sample preparation device platform (6) is located just below the hydraulic hammer (103); When the movable sample preparation device platform (6) moves to the end of the track (10) close to the triaxial compression tester (9), the movable sample preparation device platform (6) is located just below the extrusion end of the triaxial compression tester (9).

6. A hydraulic soil-rock mixture large-scale triaxial test sample preparation device according to claim 5, characterized in that: The movable sample preparation device platform (6) comprises a sample preparation platform (601), wherein the sample preparation platform (601) comprises a base and a protrusion arranged coaxially, and the base and the protrusion cooperate to form a protrusion structure, wherein the sample preparation protection sleeve (3), the latex film (4) and the film supporting cylinder (5) are coaxially arranged on the protrusion in sequence from the inside to the outside, and a total of four rollers (602) are symmetrically arranged in pairs about the middle position of the base at the bottom of the base, and the four rollers (602) correspond to the tracks (10) one by one, respectively, and the base rolls along the corresponding tracks (10) through the rollers (602) to form a sliding fit with the tracks (10).

7. A hydraulic soil-rock mixture large-scale triaxial test sample preparation device according to claim 6, characterized in that: The bottom of the latex membrane (4) is coaxially sleeved on the protrusion of the sample preparation table (601), and the bottom of the latex membrane (4) is pressed and fitted with the protrusion through a stainless steel hoop. The outer side of the latex membrane (4) is coaxially sleeved with a membrane support tube (5), and the outer wall of the latex membrane (4) is tightly attached to the inner wall of the membrane support tube (5). The bottom of the membrane support tube (5) is pressed and fitted with the protrusion through an axially arranged detachable screw. The inner side of the latex membrane (4) is coaxially and detachably embedded with a sample preparation protection sleeve (3), the outer wall of the sample preparation protection sleeve (3) is tightly attached to the inner wall of the latex membrane (4), and the bottom of the sample preparation protection sleeve (3) is supported on the protrusion.

8. The large-scale triaxial test sample preparation device for hydraulic soil-rock mixture according to claim 7, characterized in that: The top of the latex film (4) is higher than the top of the film-holding tube (5). When preparing a sample, the top of the latex film (4) is turned outward to form a sleeve fit with the top of the film-holding tube (5). When the sample preparation is completed, the top of the latex film (4) is arranged vertically, and the top of the latex film (4) cooperates with the top surface of the sample to form a mounting groove, an upper hole pressing plate (8) is embedded in the mounting groove, and the upper hole pressing plate (8) is supported on the top surface of the sample, and the inner wall of the latex film (4) and the side wall of the upper hole pressing plate (8) are sleeved and matched to form a tight fit through a stainless steel hoop.

9. A hydraulic soil-rock mixture large-scale triaxial test sample preparation device according to claim 8, characterized in that: A lower hole pressure valve (603) is provided on one side of the base of the sample preparation table (601), one end of the lower hole pressure valve (603) passes through the base and the protrusion and is connected to the inside of the membrane supporting cylinder (5), and the output end of the vacuum pump (7) provided on one side of the axial hydraulic system (1) is connected and cooperated with the other end of the lower hole pressure valve (603) through a connecting pipe.

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