A centrifuge testing device for steady-state flow of geotechnical granular materials and methods of use thereof

Abstract

The application discloses a centrifugal test device for steady flow of rock and soil particles and a use method thereof, and comprises a test device, a storage and feeding assembly, a chute assembly arranged on one side of the storage and feeding assembly, a sample recovery assembly arranged on one side of the chute assembly, and a gate control assembly arranged on one side of the storage and feeding assembly. The application has the beneficial effect that the storage and feeding assembly, the chute assembly and the sample recovery assembly are matched to fill a technical blank in the field of physical simulation of geological disasters, especially in the field of centrifugal simulation of landslide debris flow, the flow speed is controlled through the gate control assembly, the steady flow simulation of rock and soil particles under centrifugal and Coriolis conditions can be realized, the centrifugal similarity law is verified, the steady flow simulation of rock and soil particles under different centrifugal and Coriolis compound fields can be realized, and the influence of the Coriolis effect on the simulation result of the centrifugal simulation of landslide debris flow is evaluated.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of geologic hazard physical simulation, in particular to a centrifugal test device for steady-state flow of rock-soil particles and a method of using the same. BACKGROUND

[0002] Physical simulation is crucial for the study of landslide debris flow, and therefore, developing a reliable physical simulation method has been an important research issue in the field of geologic hazard physical simulation for a long time. It is well known that the deformation of geologic materials greatly depends on the stress level. The stress of rock-soil materials is reduced in a scale model test, which causes a serious scale effect problem, leading to a poor match between the physical simulation results and the prototype. The emergence of a soil centrifuge solves this problem, i.e., a scale model is placed in a virtual high gravity field, which can effectively restore the stress level of the prototype. After decades of development, the theory and technology of centrifugal simulation of quasi-static geologic processes have been quite mature, but for high-speed physical processes such as landslide debris flow, there is still a lack of perfect theory and method.

[0003] On the one hand, the Coriolis effect has a great impact on the centrifugal simulation of high-speed processes, but there is still a lack of clear understanding. This is mainly controlled by the physical simulation test equipment. There is currently no test device that can carry out simulation of rock-soil particle flow under centrifugal weak Coriolis conditions.

[0004] On the other hand, the construction of the particle flow similarity law is mostly based on the dimensional analysis of a specific physical process studied, but there is still a lack of corresponding physical simulation test verification. The verification of the similarity law for steady-state rock-soil particle flow processes is crucial, but landslide debris flow is a typical non-steady-state physical process, and there is currently no centrifugal test device that can realize simulation of steady-state particle flow under complex centrifugal-Coriolis composite fields. SUMMARY

[0005] This section is intended to summarize some aspects of the embodiments of the present application and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section as well as in the abstract and title of the specification in order to avoid obscuring the purpose of this section, the abstract and the title, and such simplifications or omissions are not to be construed as limiting the scope of the present application.

[0006] In view of the above-mentioned or existing problems in the prior art, the present application is proposed.

[0007] Therefore, the purpose of the present application is to provide a centrifugal test device for steady-state flow of rock-soil particles, which can realize centrifugal test of steady-state particle flow under complex centrifugal-Coriolis composite fields.

[0008] To solve the above technical problems, the application provides the following technical scheme: a centrifugal test device for steady flow of rock and soil particles, which comprises a test device, including a storage and feeding assembly, a chute assembly arranged on one side of the storage and feeding assembly, a sample recovery assembly arranged on one side of the chute assembly, and a gate control assembly arranged on one side of the storage and feeding assembly.

[0009] As a preferred scheme of the centrifugal test device for steady flow of rock and soil particles, the storage and feeding assembly comprises a bottom plate, a centrifugal test model box arranged on the top of the bottom plate, a feeding box fixedly connected with one side of the inner wall of the centrifugal test model box, a replenishment cylinder fixedly connected with the top of the feeding box, and a storage box fixedly connected with the top of the replenishment cylinder.

[0010] As a preferred scheme of the centrifugal test device for steady flow of rock and soil particles, the chute assembly comprises a chute tension member, a sliding surface arranged on the bottom of the chute tension member, a rigid chute support rod arranged on the bottom of the chute tension member, a driving drum tightly connected with the sliding surface, a driving shaft connected with one side of the driving drum, rigid pull rods symmetrically arranged on both sides of the driving shaft, a side wall arranged on the top of the sliding surface, a rigid shaft connecting rod arranged on one side of the sliding surface, a forcing drum arranged in the sliding surface, a forcing shaft rotatably connected with the middle part of the forcing drum, a connecting drum arranged on one side of the sliding surface, and a connecting drum shaft rotatably connected with the middle part of the connecting drum.

[0011] As a preferred scheme of the centrifugal test device for steady flow of rock and soil particles, the sample recovery assembly comprises a sample recovery bin, a spiral transmission bin fixedly connected with one side of the sample recovery bin, and a flow guide groove arranged on the top of the spiral transmission bin.

[0012] As a preferred scheme of the centrifugal test device for steady flow of rock and soil particles, the gate control assembly comprises a gate, a gate guide slot movably connected with the top of the gate, a lead screw fixedly connected with the top of the gate, and a gate controller arranged on one side of the lead screw.

[0013] A method for using the centrifugal test device for steady flow of rock and soil particles, characterized in that: the method comprises the centrifugal test device for steady flow of rock and soil particles according to any one of the claims; and,

[0014] S1: forming a weak Coriolis test condition;

[0015] S2: filling the test soil sample;

[0016] S3: starting the centrifuge to the N1 centrifugal acceleration level, and stabilizing for a period of time;

[0017] S4: starting the test device, adjusting the flow speed, and recording the flow state data;

[0018] S5: After the centrifuge is closed, the test soil sample is cleaned, and the initial state is restored;

[0019] S6: The centrifugal acceleration is modulated at different levels, and a device function curve is drawn;

[0020] S7: The particle size, gradation and other parameters of the rock-soil particles are changed, steps S2-S6 are repeated, rock-soil particle steady flow data of rock-soil particles with different characteristics under different centrifugal acceleration levels are obtained, and the device function curve is continuously improved;

[0021] S8: The inclination angle of the chute assembly is changed, and detailed device function maps under weak Coriolis conditions are obtained.

[0022] As a preferred scheme of the method for using the centrifugal test device for rock-soil particle steady flow, in step S1, the bottom plate is placed on the centrifuge basket bottom plate, that is, the direction of rock-soil particle flow is perpendicular to the centrifuge rotation plane and perpendicular to the centrifugal force direction, the test device is debugged, and the gate is in the closed state. At the same time, the horizontal position of the chute assembly is modulated first, that is, perpendicular to the centrifugal force direction.

[0023] As a preferred scheme of the method for using the centrifugal test device for rock-soil particle steady flow, in step S4, whether the image captured by the camera is clear is confirmed, the chute tension piece remote control end, the gate control assembly remote control end and the driving drum remote control end are operated, respectively, the outlet amount of the test sample soil body, the inclination angle of the sliding surface and the rotating speed of the sliding surface are adjusted, rock-soil particle flow is formed, and the camera image is analyzed in real time to determine whether steady flow is reached, that is, the flow state does not change with time. After the steady flow is stabilized, the flow state data after stabilization is recorded.

[0024] As a preferred scheme of the method for using the centrifugal test device for rock-soil particle steady flow, in step S6, the centrifugal acceleration level is modulated to N2 level, steps S4 and S5 are repeated, and rock-soil particle steady flow data under N2 level are obtained.

[0025] As a preferred scheme of the method for using the centrifugal test device for rock-soil particle steady flow, in step S8, the inclination angle of the chute assembly is changed, steps S2-S7 are repeated, detailed device function maps under weak Coriolis conditions are obtained, and appropriate test conditions are selected by referring to the drawn device function maps according to specific test requirements, and detailed test research is started.

[0026] The beneficial effects of the present application: the present application is provided by setting the storage feeding assembly, chute assembly and sample recovery assembly, fills the geological disaster physical simulation field, especially the centrifugal simulation landslide debris flow field a technical blank, through the gate control assembly control flow rate, can realize the steady flow simulation of rock and soil particles under the centrifugal weak Coriolis condition, for verifying the verification of centrifugal similarity law. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained according to these drawings without creative labor for those skilled in the art. Among them:

[0028] Figure 1 It is the overall structure section view of the centrifugal test device for rock and soil particle steady flow.

[0029] Figure 2 It is the structure schematic diagram of the storage feeding assembly and sample recovery assembly of the centrifugal test device for rock and soil particle steady flow.

[0030] Figure 3 It is the structure schematic diagram of the gate control assembly of the centrifugal test device for rock and soil particle steady flow.

[0031] Figure 4 It is the structure schematic diagram of the chute assembly of the centrifugal test device for rock and soil particle steady flow.

[0032] Figure 5 It is another angle structure schematic diagram of the chute assembly of the centrifugal test device for rock and soil particle steady flow.

[0033] Figure 6 It is the rock and soil particle steady flow process schematic diagram of the centrifugal test device for rock and soil particle steady flow.

[0034] Figure 7 It is the test schematic diagram of the rock and soil particle steady flow simulation under the weak Coriolis condition of the centrifugal test device for rock and soil particle steady flow.

[0035] Figure 8 It is the test schematic diagram of the rock and soil particle steady flow simulation under the centrifugal-Coriolis composite condition of the centrifugal test device for rock and soil particle steady flow.

[0036] Figure 9 It is the flow schematic diagram of the centrifugal test device for rock and soil particle steady flow. DETAILED DESCRIPTION

[0037] In order to make the above objectives, features and advantages of the present application more obvious and comprehensible, specific embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0038] In the following description, a lot of specific details are set forth in order to provide a thorough understanding of the present application, however, the present application can be practiced in other manners different from those described herein, and those skilled in the art can make similar generalizations without departing from the spirit and scope of the present application, therefore, the present application is not limited to the specific embodiments disclosed below.

[0039] Secondly, the "one embodiment" or "embodiment" referred to herein means that the specific features, structures or characteristics can be included in at least one implementation of the present application. "In one embodiment" appearing in different places in the specification does not mean the same embodiment, nor is it an embodiment that is independent of or selected from other embodiments.

[0040] Embodiment 1

[0041] Reference Figures 1-3 For the first embodiment of the present application, the embodiment provides a centrifugal test device for steady flow of geotechnical particles, which can realize the centrifugal test of steady particle flow simulation under complex centrifugal-Coriolis compound field.

[0042] Specifically, the test device 100 includes a storage and feeding assembly 101, a chute assembly 102 arranged on one side of the storage and feeding assembly 101, a sample recovery assembly 103 arranged on one side of the chute assembly 102, and a gate control assembly 104 arranged on one side of the storage and feeding assembly 101.

[0043] Further, the storage and feeding assembly 101 includes a bottom plate 101a, a centrifugal test model box 101b arranged on the top of the bottom plate 101a, a feeding box 101c fixedly connected with one side of the inner wall of the centrifugal test model box 101b, a replenishment cylinder 101d fixedly connected with the top of the feeding box 101c, and a storage box 101e fixedly connected with the top of the replenishment cylinder 101d.

[0044] Further, the chute assembly 102 comprises a chute tension member 102a, a sliding surface 102b arranged at the bottom of the chute tension member 102a, a rigid chute support rod 102c arranged at the bottom of the chute tension member 102a, a driving roller 102d closely connected with the sliding surface 102b, a driving shaft 102e connected with one side of the driving roller 102d, a rigid tension rod 102f symmetrically arranged at both sides of the driving shaft 102e, a side wall 102g arranged at the top of the sliding surface 102b, a rigid shaft connecting rod 102h arranged at one side of the sliding surface 102b, a forcing roller 102i arranged inside the sliding surface 102b, a forcing shaft 102j rotatably connected with the middle part of the forcing roller 102i, a connecting roller 102k arranged at one side of the sliding surface 102b, and a connecting roller shaft 102l rotatably connected with the middle part of the connecting roller 102k.

[0045] Further, the sample recovery assembly 103 comprises a sample recovery bin 103a, a spiral transmission bin 103b fixedly connected with one side of the sample recovery bin 103a, and a flow guide groove 103c arranged at the top of the spiral transmission bin 103b.

[0046] Further, the gate control assembly 104 comprises a gate 104a, a gate guide groove 104b movably connected with the top of the gate 104a, a lead screw 104c fixedly connected with the top of the gate 104a, and a gate controller 104d arranged at one side of the lead screw 104c.

[0047] It should be noted that the feeding cylinder 101d is perpendicular to the direction of the centrifugal force. According to the flow state of the rock and soil particles captured by the high-speed camera, the remote control end of the chute tension member 102a, the remote control end of the gate control assembly 104, and the remote control end of the driving roller 102d are remotely controlled to respectively adjust the outlet amount of the sample soil body, the inclination angle of the chute assembly 102, and the rotating speed of the sliding surface 102b, and the iteration is continuously performed until the steady-state flow of the rock and soil particles is realized.

[0048] In use, the sliding surface 102b can be made of flexible rubber material, tightly connected with the driving roller 102d, and can rotate counterclockwise under the driving of the driving roller 102d to form a mode of movement like a conveyor belt. The driving roller 102d can be driven by a rotating motor, and rotates around the driving shaft 102e. The rotating motor can be regulated by the rotating motor control end located in the centrifugal control chamber. The driving shaft 102e is hinged with the rigid chute support rod 102c and the rigid pull rod 102f, and can rotate freely. The rigid chute support rod 102c is rigidly connected with the bottom of the model box to provide support, and the rigid pull rod 102f is rigidly connected with the chute tension member 102a and controls the stability of the end of the chute. The chute tension member 102a can be replaced by a stepping motor, and is controlled by the driving roller remote control end located in the centrifugal control chamber. By controlling the extension and retraction of the stepping motor screw rod, the position of the end of the chute is controlled to change the inclination angle of the chute. To avoid deformation of the flexible sliding surface 102b under the pressure of the test soil sample, a plurality of forcing rollers 102i are densely arranged inside the sliding surface 102b, which have a diameter much smaller than that of the driving roller 102d, so as to ensure that the sliding surface 102b is effectively supported. The forcing roller 102i can rotate around the forcing shaft 102j under the driving of the sliding surface 102b, thereby reducing the friction resistance. The forcing shaft 102j is rigidly connected with the rigid chute support rod 102c and the rigid pull rod 102f through the rigid shaft connecting rod 102h, so as to ensure the stability of the chute structure. The bottom of the chute side wall 102g is in close contact with the sliding surface 102b without connection, so as to ensure the movement of the sliding surface 102b and prevent leakage of the side wall 102g. The two ends of the chute side wall 102g are rigidly connected with the rigid chute support rod 102c and the rigid pull rod 102f, so as to ensure the stability thereof. The end of the sliding surface 102b close to the gate 104a is in contact with the connecting roller 102k, which rotates around the connecting roller shaft 102l rigidly fixed on the rigid chute support rod 102c. The other side of the connecting roller 102k is in close contact with the bottom of the feeding box 101c without connection, and its function is to prevent the soil sample flowing out of the outlet from leaking from the head of the chute assembly 102 when it has not completely entered the chute assembly 102.

[0049] After the test soil sample flows through the end of the slide surface 102b, it enters the sample recovery bin 103a and flows from the sample recovery bin 103a into the spiral conveying bin 103b. The test soil sample is conveyed from the bottom to the top of the model box through the spiral conveying bin 103b and flows into the guide groove 103c, and the test soil sample recovery is completed. The latter realizes the stability of the outlet velocity through two mechanisms. The feeding cylinder 101d is arranged vertically to the direction of the centrifugal force, and is connected with the storage tank 101e and the feeding tank 101c, so that the test soil sample outside the feeding tank 101c is borne by the rigid structure part of the feeding cylinder 101d itself, the height of the soil sample in the feeding tank 101c is kept constant, the change of the top pressure is small, and thus the constant pressure of the bottom soil sample can be ensured. At the same time, the size of the soil sample release amount is controlled through the gate 104a, so as to ensure the constant outlet velocity of the soil sample, and thus the steady flow is realized. The gate controller 104d can be realized by a stepping motor, the lead screw 104c is connected with the stepping motor and can be freely extended and retracted under the control of the stepping motor. The other end of the lead screw 104c is rigidly connected with the gate 104a, and the gate guide groove 104b is rigidly fixed on the side wall 102g of the feeding tank 101c. The gate 104a is inserted into the gate guide groove 104b without being connected and fixed. The operation of the stepping motor is controlled by the gate control device at the remote control end in the centrifugal control chamber, the lead screw 104c is driven to extend and retract, and then the gate 104a is controlled to move upward or downward along the gate guide groove 104b, so as to control the storage and release of the soil sample. The released soil sample flows into the slide groove assembly 102 to form a rock-soil particle flow, and the test soil sample flowing through the end of the slide groove assembly 102 is recovered by the sample recovery assembly 103, and thus the steady flow simulation test is completed.

[0050] In summary, the present application fills a technical blank in the field of geological disaster physical simulation, especially in the field of centrifugal simulation of landslide debris flow, by cooperating the storage and feeding assembly, the slide groove assembly and the sample recovery assembly. The gate control assembly is used to control the flow velocity, so as to realize the simulation of the steady flow of rock-soil particles under the weak Coriolis condition in the centrifugal field, and to verify the centrifugal similarity law.

[0051] Embodiment 2

[0052] Reference Figure 1 For the second embodiment of the present application, the embodiment provides a centrifugal test method for the steady flow of rock-soil particles, which can provide a test method for simulating the steady flow of rock-soil particles under the weak Coriolis condition.

[0053] Specifically, S1: forming a weak Coriolis test condition;

[0054] S2: loading the test soil sample;

[0055] S3: starting the centrifuge to the N1 centrifugal acceleration level, and stabilizing for a period of time;

[0056] S4: start the test device 100, adjust the flow velocity, and record the flow state data;

[0057] S5: after the centrifuge is turned off, clean the test soil sample and restore the initial state;

[0058] S6: adjust the centrifugal acceleration to different levels, and draw the device function curve;

[0059] S7: change the particle size and grading of the rock-soil particles, repeat steps S2-S6, obtain the steady flow data of the rock-soil particles under different centrifugal acceleration levels, and continue to improve the device function curve;

[0060] S8: change the inclination angle of the chute assembly 102, and obtain the detailed device function diagram under weak Coriolis conditions.

[0061] Further, in step S1, the bottom plate 101a is placed on the bottom plate of the centrifuge basket, that is, the direction of the rock-soil particle flow is perpendicular to the rotation plane of the centrifuge and perpendicular to the centrifugal force direction. Adjust the test device 100 and make the gate 104a in the closed state. At the same time, first adjust the chute assembly 102 to the horizontal position, that is, perpendicular to the direction of the centrifugal force.

[0062] Further, in step S4, confirm whether the image captured by the camera is clear, operate the remote control end of the chute tension member 102a, the remote control end of the gate control assembly 104, and the remote control end of the driving roller 102d, respectively adjust the outlet amount of the test soil body, the inclination angle of the sliding surface 102b, and the rotation speed of the sliding surface 102b, form the flow of rock-soil particles, and analyze the camera image in real time to determine whether the steady flow is reached, that is, the flow state does not change with time. After the steady flow is reached, record the flow state data after the steady flow.

[0063] Further, in step S6, adjust the centrifugal acceleration level to N2 level, repeat steps S4 and S5, and obtain the steady flow data of the rock-soil particles under N2 level.

[0064] Further, in step S8, change the inclination angle of the chute assembly 102, repeat steps S2-S7, obtain the detailed device function diagram under weak Coriolis conditions, refer to the drawn device function diagram according to the specific test requirements, select appropriate test conditions, and start detailed test research.

[0065] It should be noted that the key to achieving steady flow is that the test soil sample gradually reaches a steady state after a long flow process. The present application achieves steady flow through two mechanisms. One is to ensure that the test soil body is sufficient, and the other is to ensure a constant pressure at the bottom of the test soil sample. In this way, on the one hand, there is enough test soil sample to ensure that the flow reaches a steady state, and on the other hand, the speed at the outlet of the test soil sample is stable. The former ensures sufficient test soil sample by using a larger storage tank 101e, and the second recycles the test soil sample by using a sample recycling assembly 103 to achieve recycling of the test soil sample.

[0066] Embodiment 3

[0067] Referring to Figure 1 For the third embodiment of the present application, the embodiment provides a centrifugal test method for steady flow of geotechnical particles, which can provide a method for simulating steady flow of geotechnical particles under centrifugal-Coriolis combined conditions.

[0068] V1: First, place the bottom plate 101a on the bottom plate of the centrifuge basket without connecting it, place the model box, that is, the direction of the flow of geotechnical particles is consistent with the rotation plane of the centrifuge, forming a centrifugal-Coriolis combined condition;

[0069] V2: Repeat steps S1-S2 and S1-S8 to obtain the function diagram of the device under centrifugal-Coriolis combined conditions;

[0070] V3: In combination with the specific test requirements, refer to the device function diagram drawn, select the appropriate test conditions, and start detailed test research.

[0071] In summary, the present application realizes the simulation of steady flow of geotechnical particles under different centrifugal-Coriolis combined fields, and is used for evaluating the influence of the Coriolis effect on the results of centrifugal simulation of landslide debris flow.

[0072] It is important to note that the construction and arrangement of the application shown in the various exemplary embodiments is illustrative only. Although only a few embodiments have been described in detail in this disclosure, those skilled in the art who review the present disclosure will readily appreciate that many modifications are possible (e.g., variations in sizes, dimensions, structures, shapes and proportions of the various elements, values of parameters, mounting arrangements, use of materials, colors, orientations, etc.) without materially departing from the novel teachings and advantages of the subject matter described herein. For example, elements shown as integrally formed can be constructed of multiple parts or elements, the position of elements can be reversed or otherwise varied, and the nature or number of elements or positions can be altered or varied. Thus, the foregoing description is by way of example only, and is not intended to be limiting. The application is limited only as defined in the following claims and equivalents thereto. The sequence of any process or method steps, or the order in which they are carried out, can be altered or re-ordered without departing from the scope of the application. Any "means plus function" clauses are intended to cover the structures described herein as performing the recited functionality and not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes, and omissions can be made in the design, operating conditions, and arrangement of the exemplary embodiments without departing from the scope of the application as expressed in the appended claims. Accordingly, the application is not limited to the specific embodiments described herein, but instead has wide applicability to the various alternative embodiments and modifications that come within the scope of the appended claims.

[0073] Also, in an effort to provide a concise description of the exemplary embodiments, all features of an actual implementation can not be described (that is, those unrelated to the presently contemplated best mode of carrying out the application, or those unrelated to enabling the claimed application).

[0074] It should be appreciated that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions can be made. Such development efforts might be complex and time-consuming, but would nevertheless be a routine undertaking of design, fabrication, and manufacture for those of ordinary skill having the benefit of this disclosure.

[0075] It should be noted that the above-mentioned embodiments are only used to illustrate the technical solutions of the present application but not to limit the present application, and although the present application is described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or equivalent replaced without departing from the spirit and scope of the present application, and all should be covered in the scope of the claims of the present application.

Claims

1. A centrifuge testing apparatus for steady state flow of geotechnical granular materials, characterized by: The utility model relates to a kind of centrifugal test device for geotechnical particle steady flow, comprising the following steps: S1: forming weak coffer test condition; S2: filling test soil sample; S3: starting centrifuge to N1 centrifugal acceleration level, and stabilizing for a period of time; S4: starting test device (100), adjusting flow velocity, and recording flow state data; S5: after closing centrifuge, cleaning test soil sample, restoring initial state; 2. A method for using a centrifuge testing device for steady-state flow of soil and rock particles, characterized in that: S6: modulating different levels of centrifugal acceleration, drawing device function curve. ​ ​ ​ ​ ​ ​ S7: change the particle size, grading and other parameters of the rock-soil particles, repeat the steps S2-S6, obtain the steady flow data of rock-soil particles under different centrifugal acceleration levels, and continue to improve the device function curve; S8: change the inclination angle of the chute assembly (102) to obtain detailed device function diagram under weak Coriolis condition.

3. The method of using the apparatus for centrifuge testing of steady state flow of geotechnical granular materials of claim 2, wherein: In the step S1, the bottom plate (101a) is placed on the bottom plate of the centrifuge basket, that is, the direction of rock-soil particle flow is perpendicular to the rotation plane of the centrifuge and perpendicular to the direction of centrifugal force. The test device (100) is debugged, and the gate (104a) is in the closed state. At the same time, the chute assembly (102) is first adjusted to the horizontal position, that is, perpendicular to the direction of centrifugal force.

4. The method of using the apparatus for centrifuge testing of steady state flow of geotechnical granular materials of claim 3, wherein: In the step S4, it is confirmed whether the image captured by the camera is clear, and the remote control end of the chute tension member (102a), the remote control end of the gate control assembly (104) and the remote control end of the driving roller (102d) are operated to adjust the outlet amount of the test sample soil body, the inclination angle of the sliding surface (102b) and the rotation speed of the sliding surface (102b) respectively, form the flow of rock-soil particles, and analyze the camera image in real time to determine whether the steady flow is reached, that is, the flow state does not change with time. After the stability is reached, the flow state data after the stability is recorded.

5. The method of using the apparatus for centrifuge testing of steady state flow of geotechnical granular materials of claim 4, wherein: In the step S6, the centrifugal acceleration level is adjusted to N2 level, the steps S4 and S5 are repeated, and the steady flow data of rock-soil particles under N2 level is obtained.

6. The method of using the apparatus for centrifuge testing of steady state flow of geotechnical granular materials of claim 5, wherein: In the step S8, the inclination angle of the chute assembly (102) is changed, the steps S2-S7 are repeated, the detailed device function diagram under weak Coriolis condition is obtained, the appropriate test conditions are selected by referring to the drawn device function diagram combined with the specific test requirements, and the detailed test research is started.

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