CN110095586B - Mud-rock flow simulation test device and test method for assembled trench - Google Patents

Mud-rock flow simulation test device and test method for assembled trench Download PDF

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CN110095586B
CN110095586B CN201910442016.0A CN201910442016A CN110095586B CN 110095586 B CN110095586 B CN 110095586B CN 201910442016 A CN201910442016 A CN 201910442016A CN 110095586 B CN110095586 B CN 110095586B
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channel
straight
assembled
bottom groove
groove
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CN110095586A (en
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宋盛渊
于崇嘉
陈剑平
岳钢
曾杰
包一丁
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Sixth Geological Prospecting Engineering Brigade Of Jilin Province
Jilin University
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Sixth Geological Prospecting Engineering Brigade Of Jilin Province
Jilin University
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C11/00—Photogrammetry or videogrammetry, e.g. stereogrammetry; Photographic surveying
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
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    • G01L5/0052—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes measuring forces due to impact
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/24—Earth materials
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P5/00—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft

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Abstract

The invention discloses a debris flow simulation test device and a debris flow simulation test method for an assembled trench. The beneficial effects of the invention are as follows: the assembled channel is formed by connecting a plurality of through channels with triangular steps arranged at the inner bottoms and curved channels and is arranged on the liftable support. The high-speed miniature camera embedded in the straight channel, the novel optical fiber sensor embedded in the curved channel and the impact force testing system are connected with the testing processing system through data wires; the invention can be applied to the simulation of debris flows with different ditch shapes, different lengths, different friction degrees and different gradients, the ditch can be repeatedly assembled and utilized, has strong adaptability, realizes the automatic data acquisition and processing of the whole processes of movement, impact and accumulation of the debris flows, has strong time monitoring and anti-interference capability, and provides scientific basis for disaster prevention of the debris flows.

Description

Mud-rock flow simulation test device and test method for assembled trench
Technical Field
The invention relates to a debris flow simulation test device, in particular to a debris flow simulation test device and a test method for an assembled channel, and belongs to the technical field of debris flow simulation tests.
Background
Debris flow is a common geological disaster in mountain areas, is a special fluid-solid coupling substance formed by precipitation converging, and is a phenomenon that a building along the way is damaged greatly when the debris flow is poured down in a valley with a certain gradient at a very high speed. Because the method has the characteristics of sudden burst, high flow speed, high hazard and the like, dynamic parameters (movement track, speed, impact force and the like) in the movement process of the debris flow are required to be predicted, and a guiding opinion is provided for disaster prevention and reduction of the debris flow.
In the prior art, dynamic parameters of the debris flow are mainly obtained through a method of on-site monitoring or actual measurement. However, the occurrence frequency of the debris flow is low, and a long time is required for monitoring or observation to be possible to catch the occurring debris flow. In sum, this technique is time consuming, costly, equipment is not reusable, and there is a high likelihood that it will return.
Different types and different periods of debris flow characteristics have great differences, which are mainly related to the channels (trench shape, length, friction and gradient) of the debris flow. In recent years, indoor simulation technology of debris flow has appeared slightly. However, in the prior art, the channels for simulating the debris flow are special and have poor universal applicability, and simulation of the debris flow of different types and different periods and acquisition of dynamic parameters cannot be performed.
Disclosure of Invention
The invention aims to solve the problems, and provides a debris flow simulation test device and a test method for an assembled channel, which can simulate debris flows with different ditch shapes, different lengths, different friction degrees and different gradients, and can realize information acquisition of debris flow motion videos, flow velocity, impact force and the like through an embedded high-speed micro camera and a novel optical fiber sensor.
The invention realizes the above purpose through the following technical scheme: the debris flow simulation testing device for the assembled trench comprises a material box, a stirring lifter, an assembled trench, a liftable support, an impact force testing system, a stacking box, a data line and a testing processing system; the assembled channel is arranged on the liftable support, the stirring hoister is arranged at the top end of the assembled channel, the stacking box is arranged at the bottom end of the assembled channel, the stirring hoister is arranged in the material box, the impact force testing system is fixed in the stacking box, and the assembled channel, the impact force testing system and the testing processing system are electrically connected through data wires respectively.
The assembled channel consists of three straight channels and two curved channels, and the connection sequence is as follows: the straight-through channel is formed by connecting a straight channel cover groove to a straight channel bottom groove through a blade cover and fixing the straight channel cover groove and the straight channel bottom groove together through bolts on a connecting support, the curved channel is formed by connecting a curve cover groove to a curve bottom groove through a blade cover and fixing the curved channel and the straight channel through bolts on the connecting support, and threads are arranged at two ends of the straight channel and the curved channel.
The straight-through channel consists of a straight-channel cover groove and a straight-channel bottom groove, wherein the straight-channel bottom groove is made of cast iron with high strength and rigidity, the cross section of the straight-channel bottom groove is semicircular, the opening of the straight-channel bottom groove is provided with an inscribed cutting edge, two ends of the straight-channel bottom groove are provided with screw threads, the head end of the straight-channel bottom groove is provided with an inner-fastening screw thread, the tail end of the straight-channel bottom groove is provided with an outer-fastening screw thread, the inside of the straight-channel bottom groove is provided with equidistant and parallel triangular steps, and the outer bottom of the straight-channel bottom groove is provided with two connecting rings connected with a liftable support; the straight channel cover groove is made of transparent toughened plastic, the cross section of the straight channel cover groove is semicircular, an external cutting edge is arranged at the opening of the straight channel cover groove, threads are arranged at two ends of the straight channel cover groove, inner-fastening threads are arranged at the head end of the straight channel cover groove, outer-fastening threads are arranged at the tail end of the straight channel cover groove, and an embedded high-speed miniature camera is arranged at the inner bottom of the straight channel cover groove.
The curved channel consists of a curved channel cover groove and a curved channel bottom groove, the curved channel bottom groove is made of cast iron with high strength and rigidity, the cross section of the curved channel bottom groove is semicircular, the opening of the curved channel bottom groove is provided with an inscribed cutting edge, the flat section of the curved channel bottom groove is a curved concentric circle, the angle of the circular arc is 45 degrees, two ends of the curved channel bottom groove are provided with screw threads, the head end is an inner screw thread, the tail end is an outer screw thread, the inside of the curved channel bottom groove is provided with equidistant and parallel triangular steps, the novel optical fiber sensor is arranged on the inner side face of the curve bottom groove, the curve cover groove is made of transparent toughened plastic, the cross section of the curve cover groove is semicircular, an external cutting edge is arranged at the opening of the curve cover groove, the flat section of the curve cover groove is curved concentric circles, the angle of the circular arc is 45 degrees, threads are arranged at the two ends of the curve cover groove, and the head end is inner thread type threads and the tail end is outer thread type threads.
The test method of the mud-rock flow simulation test device of the assembled channel comprises the following steps:
step 1, according to the ditch shape and length of the actual debris flow ditch to be simulated, selecting a corresponding number of through ditches and bending ditches to be connected in sequence, connecting and assembling the inner buckle screw threads at the head end and the outer buckle screw threads at the tail end to form an assembled ditch of the debris flow, then fixing the assembled ditch on a lifting support in an inclined mode, adjusting the gradient of the lifting support to enable the gradient of the assembled ditch to conform to the gradient of the actual debris flow ditch, finally connecting a material box, a stirring elevator, an impact force testing system and a stacking box with the assembled ditch in sequence, embedding a high-speed miniature camera in the through ditches of the assembled ditch, embedding a novel optical fiber sensor in the bending ditches of the assembled ditch, and connecting the impact force testing system with a test processing system through a data line to complete the assembly of the simulation testing device;
step 2, after the device is assembled, placing the prepared debris flow material in a material box, throwing the debris flow material at an inlet of an assembled channel through a stirring lifter, enabling the material to move downwards along the assembled channel, and enabling the material to fall into a stacking box after impacting an impact force testing system at the bottom end of the assembled channel;
step 3, when materials pass through a straight-through channel of the assembled channel, an embedded high-speed miniature camera is arranged at the inner bottom of the straight-through channel to shoot videos in the movement process of the debris flow, and when the materials pass through a curved channel of the assembled channel, a novel optical fiber sensor arranged on the inner side surface of a curved channel curved bottom groove tests the impact force of the debris flow substances on the curved position to strike the channel;
and 4, video data in the debris flow movement process shot by the high-speed miniature camera, impact force data of the debris flow substances tested by the novel optical fiber sensor impacting the channel at the turning position, and impact force data obtained by the materials impacting the impact force testing system at the bottom end of the assembled channel are transmitted to the testing processing system through the data line.
Preferably, in order to facilitate the connection and assembly between the two ends, the cross-sectional radii of the straight channel cover groove, the straight channel bottom groove, the curved channel cover groove and the curved channel bottom groove are all the same, and the inner buckle type screw thread at the head end and the outer buckle type screw thread at the tail end are all the same.
Preferably, in order to realize the simulation of debris flow with different ditch shapes, different lengths, different friction degrees and different gradients, the collection of information such as debris flow motion video, flow velocity and impact force is realized simultaneously, the specific number, connection sequence and height of the straight-through channels and the bent channels of the assembly type channels and the liftable support are determined by the actual debris flow channels to be simulated, and the high-speed miniature camera arranged in the straight channel cover groove and the novel optical fiber sensor arranged in the curve bottom groove are electrically connected with external equipment.
The beneficial effects of the invention are as follows: the mud-rock flow simulation test device and the test method for the assembled channel are reasonable in design, are formed by connecting a plurality of through channels with triangular steps arranged at the bottoms of the through channels and a plurality of bending channels, can specifically adjust the shape, the length, the friction and the gradient of the mud-rock flow channels to be simulated according to the mud-rock flow channels, can realize the simulation of mud-rock flow channels of different types and different periods, and are high in general applicability and capable of being repeatedly assembled and utilized.
The invention embeds the high-speed miniature camera in the straight-through channel, embeds the novel optical fiber sensor in the curved channel, and simultaneously accesses the testing processing system, thereby not only realizing the automatic data acquisition of the whole process of the movement, the impact and the accumulation of the debris flow, but also calculating the dynamic parameters (movement track, speed, impact force and the like) of the debris flow in the movement and the impact process, having the advantages of time monitoring and strong anti-jamming capability, and being convenient for providing scientific basis for disaster prevention and reduction of the debris flow.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic cross-sectional view of an assembled channel of the present invention;
FIG. 3 is a schematic bottom view of an assembled trench of the present invention;
fig. 4 is a schematic top plan view of an assembled channel of the present invention.
In the figure: A. the novel optical fiber sensor comprises a material box, B, a stirring lifter, C, an assembled channel, D, a liftable support, E, an impact force testing system, F, a stacking box, G, a data wire, H, a testing processing system, J, a straight-through channel, K, a bent channel, J1, a first straight-through channel, J2, a second straight-through channel, J3, a third straight-through channel, K1, a first bent channel, K2, a second bent channel, 1, a straight-channel cover groove, 2, a cutting edge, 3, a straight-channel bottom groove, 4, a connecting support, 5, a bolt, 6, a curve cover groove, 7, a curve bottom groove, 8, screw threads, 9, a triangular step, 10, a connecting ring, 11, a high-speed miniature camera and 12 and a novel optical fiber sensor.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1 to 4, a debris flow simulation test device for an assembled trench comprises a material box a, a stirring lifter B, an assembled trench C, a liftable support D, an impact force test system E, a stacking box F, a data line G and a test processing system H; the combined type channel C is arranged on the liftable support D, the top end of the combined type channel C is provided with a stirring lifter B, the bottom end of the combined type channel C is provided with a stacking box F, the bottom end of the stirring lifter B is arranged in a material box A, an impact force testing system E is fixed in the stacking box F, and the combined type channel C, the impact force testing system E and a testing processing system H are electrically connected through data lines G respectively.
Further, the assembled channel C is composed of three through channels J and two curved channels K, and the connection sequence is as follows: the straight-through channel J1, the first bending channel K1, the second straight-through channel J2, the second bending channel K2 and the third straight-through channel J3 are covered on the straight-through bottom groove 3 by the straight-through cover groove 1 through the cutting edge 2 and are fixed together through the bolt 5 on the connecting support 4, the bending channel K is covered on the bending bottom groove 7 by the bending cover groove 6 through the cutting edge 2 and is fixed together through the bolt 5 on the connecting support 4, and both ends of the straight-through channel J and the bending channel K are provided with screw threads 8.
Further, the through channel J is composed of a straight channel cover groove 1 and a straight channel bottom groove 3, the straight channel bottom groove 3 is made of cast iron with high strength and rigidity, the cross section of the straight channel bottom groove 3 is semicircular, an internally tangent cutting edge 2 is arranged at the opening of the straight channel bottom groove 3, threads 8 are arranged at two ends of the straight channel bottom groove 3, an inner thread type thread 8 is arranged at the head end of the straight channel bottom groove 3, an outer thread type thread 8 is arranged at the tail end of the straight channel bottom groove 3, equally-spaced parallel triangular steps 9 are arranged in the straight channel bottom groove 3 and used for simulating rough and uneven shapes of the bottom of an actual debris flow channel, and two connecting rings 10 connected with a lifting support D are arranged at the outer bottom of the straight channel bottom groove 3; the straight channel cover groove 1 is made of transparent toughened plastic, the cross section of the straight channel cover groove 1 is semicircular, an externally-tangent cutting edge 2 is arranged at the opening of the straight channel cover groove 1, threads 8 are arranged at two ends of the straight channel cover groove 1, inner threads 8 are arranged at the head end of the straight channel cover groove 1, outer threads 8 are arranged at the tail end of the straight channel cover groove 1, and an embedded high-speed miniature camera 11 is arranged at the inner bottom of the straight channel cover groove 1.
Further, the bending channel K comprises bend cover groove 6, bend kerve 7 is by intensity, the great cast iron preparation of rigidity forms, just the cross section of bend kerve 7 is semicircular, the opening part of bend kerve 7 is provided with incision blade 2, the flush cross section of bend kerve 7 is crooked concentric circular, and the angle of circular arc is 45, the both ends of bend kerve 7 are provided with screw thread 8, and the front end is interior knot 8, end is outer knot formula screw thread 8, the inside of bend kerve 7 is provided with equidistant, parallel triangle step 9, the medial surface of bend kerve 7 is provided with novel optical fiber sensor 12, bend cover groove 6 is by transparent toughened plastics preparation, just the cross section of bend cover groove 6 is semicircular, the opening part of bend cover groove 6 is provided with incision blade 2, the flush cross section of bend cover groove 6 is crooked concentric circular, and the angle of circular arc is 45 too, bend cover groove 6's inside is provided with equidistant, 8, and the end is outer knot formula 8.
The test method of the mud-rock flow simulation test device of the assembled channel comprises the following steps:
step 1, selecting three through channels J and two bending channels K to be sequentially connected to form an assembled channel C, wherein the connection sequence is as follows: the method comprises the steps of connecting a first straight-through channel J1, a first bending channel K1, a second straight-through channel J2, a second bending channel K2 and a third straight-through channel J3, connecting an inner buckle type screw thread 8 at the head end and an outer buckle type screw thread 8 at the tail end in an end-to-end manner to form an assembled channel C of debris flow, then obliquely fixing the assembled channel C on a liftable support D, adjusting the gradient of the liftable support D to enable the gradient of the assembled channel C to conform to the gradient of an actual debris flow channel, connecting a material box A, a stirring elevator B, an impact force testing system E and a stacking box F with the assembled channel C in sequence, embedding a high-speed miniature camera 11 in the straight-through channel J of the assembled channel C, embedding a novel optical fiber sensor 12 in the bending channel K of the assembled channel C, and connecting an impact force testing system E with a test processing system H through a data line G to complete the assembly of an analog testing device;
step 2, after the device is assembled, placing the prepared debris flow material in a material box A, throwing the debris flow material at an inlet of an assembled channel C through a stirring lifter B, enabling the material to move downwards along the assembled channel C, and enabling the material to fall into a stacking box F after impacting an impact force testing system E at the bottom end of the assembled channel C;
step 3, when materials pass through a straight-through channel J of an assembly type channel C, an embedded high-speed miniature camera 11 is arranged at the inner bottom of the straight-through channel J to shoot videos in the movement process of debris flow, and when materials pass through a bending channel K of the assembly type channel C, a novel optical fiber sensor 12 arranged on the inner side surface of a bending channel K bend bottom groove tests the impact force of debris flow substances striking the channel at a turning part;
and 4, video data in the debris flow movement process shot by the high-speed miniature camera 11, impact force data of the debris flow substances tested by the novel optical fiber sensor 12 in the impact channel at the turning position, and impact force data obtained by the impact force testing system E of the materials in the bottom end of the assembled channel C are transmitted to the testing processing system H through the data line G, so that kinetic parameters of the debris flow in the movement and impact process can be calculated.
The cross section radiuses of the straight channel cover groove 1, the straight channel bottom groove 3, the curve cover groove 6 and the curve bottom groove 7 are the same, the inner buckle type screw thread 8 at the head end and the outer buckle type screw thread 8 at the tail end are the same, the outer screw thread 8 at the tail end can correspond to the inner screw thread 8 at the head end, the head and tail connection and assembly between the straight channel J and the curve channel K of the assembled channel C are convenient, the specific number, the connection sequence and the height of the liftable support D of the assembled channel C are determined by the actual debris flow channel to be simulated, and the high-speed miniature camera 11 arranged in the straight channel cover groove 1 and the novel optical fiber sensor 12 arranged in the curve bottom groove 7 are electrically connected with external equipment, so that the debris flow simulation of different channel shapes, different lengths, different friction degrees and different gradients can be realized, and the collection of debris flow motion videos, flow speeds, impact forces and other information can be realized.
Working principle: when the mud-rock flow simulation test device and the test method of the assembled channel are used, corresponding numbers of through channels J and curved channels K are assembled according to actual mud-rock flow channels to be simulated; secondly, correspondingly connecting the assembled straight channel J provided with the triangular step 9 and the assembled bent channel K according to the valley form (ditch shape and length) of the debris flow ditch to be simulated to form an assembled channel C of the debris flow; then fixing the assembled channel C on a liftable support D, and adjusting the liftable support D to achieve the gradient of the debris flow ditch to be simulated; finally, the material box A, the stirring elevator B, the assembled channel C, the impact force testing system E and the stacking box F are sequentially connected together, and the embedded high-speed miniature camera 11 in the assembled channel C, the novel optical fiber sensor 12 and the impact force testing system E are connected with the testing processing system H through the data line G, so that automatic collection and processing of debris flow dynamic parameters (motion trail, speed, impact force and the like) are realized. After the device is assembled, the prepared debris flow materials are placed in a material box A, the debris flow materials are put in the inlet of an assembled channel C through a stirring lifter B, the materials move downwards along the assembled channel C, the materials fall into a stacking box F after impacting an impact force testing system E at the bottom end of the assembled channel C, and the assembled channel C and the impact force testing system E transmit collected video data and mechanical data to a testing processing system H through a data line G.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.

Claims (2)

1. The utility model provides a mud-rock flow simulation test device of assembled channel which characterized in that: the device comprises a material box (A), a stirring lifter (B), an assembled channel (C), a liftable support (D), an impact force testing system (E), a stacking box (F), a data line (G) and a testing processing system (H); the combined type channel (C) is arranged on the liftable support (D), the top end of the combined type channel (C) is provided with a stirring lifter (B), the bottom end of the combined type channel (C) is provided with a stacking box (F), the bottom end of the stirring lifter (B) is arranged in a material box (A), an impact force testing system (E) is fixed in the stacking box (F), and the combined type channel (C), the impact force testing system (E) and a testing processing system (H) are electrically connected through a data line (G) respectively;
the assembled channel (C) is composed of three through channels (J) and two bending channels (K), and the connection sequence is as follows: the device comprises a first straight-through channel (J1), a first bent channel (K1), a second straight-through channel (J2), a second bent channel (K2) and a third straight-through channel (J3), wherein the straight-through channel (J) is covered on a straight-through bottom groove (3) through a cutting edge (2) by a straight-through cover groove (1), the straight-through bottom groove and the straight-through bottom groove are fixed together through bolts (5) on a connecting support (4), the bent channel (K) is covered on a bent-channel bottom groove (7) through a cutting edge (2) by a bent-channel cover groove (6), the bent-channel cover groove and the straight-through bottom groove are fixed together through bolts (5) on the connecting support (4), and screw threads (8) are arranged at two ends of the straight-through channel (J) and the bent-channel (K);
the straight-through channel (J) is composed of a straight-channel cover groove (1) and a straight-channel bottom groove (3), the straight-channel bottom groove (3) is made of cast iron with high strength and rigidity, the cross section of the straight-channel bottom groove (3) is semicircular, an internally tangent cutting edge (2) is arranged at the opening of the straight-channel bottom groove (3), threads (8) are arranged at two ends of the straight-channel bottom groove (3), an inner-fastening thread (8) is arranged at the front end of the straight-channel bottom groove (3), an outer-fastening thread (8) is arranged at the tail end of the straight-channel bottom groove (3), equidistant and parallel triangular steps (9) are arranged in the straight-channel bottom groove (3), and two connecting rings (10) connected with a lifting support (D) are arranged at the outer bottom of the straight-channel bottom groove (3); the straight channel cover groove (1) is made of transparent toughened plastic, the cross section of the straight channel cover groove (1) is semicircular, an external cutting edge (2) is arranged at the opening of the straight channel cover groove (1), threads (8) are arranged at two ends of the straight channel cover groove (1), an inner-fastening thread (8) is arranged at the front end of the straight channel cover groove (1), an outer-fastening thread (8) is arranged at the tail end of the straight channel cover groove (1), and an embedded high-speed miniature camera (11) is arranged at the inner bottom of the straight channel cover groove (1);
the bending channel (K) is formed by a bending cover groove (6) and a bending bottom groove (7), the bending bottom groove (7) is made of cast iron with high strength and rigidity, the cross section of the bending bottom groove (7) is semicircular, an inscribed cutting edge (2) is arranged at the opening of the bending bottom groove (7), the flat cross section of the bending bottom groove (7) is a bent concentric circle, the angle of an arc is 45 degrees, threads (8) are arranged at the two ends of the bending bottom groove (7), inner threads (8) and outer threads (8) are arranged at the head ends, equally-spaced parallel triangular steps (9) are arranged inside the bending bottom groove (7), a novel optical fiber sensor (12) is arranged on the inner side surface of the bending bottom groove (7), the bending bottom groove (6) is made of transparent toughened plastics, the cross section of the bending bottom groove (6) is semicircular, an circumscribed bending bottom groove (2) is arranged at the opening of the bending bottom groove (6), threads (8) are arranged at the two ends of the bending bottom groove (7), and the two ends of the bending bottom groove (7) are concentric threads (8), and the two ends of the bending bottom groove (7) are the inner threads (8);
the cross section radiuses of the straight road cover groove (1), the straight road bottom groove (3), the curve road cover groove (6) and the curve road bottom groove (7) are the same, the inner buckle type screw thread (8) at the head end and the outer buckle type screw thread (8) at the tail end are corresponding, and the inner buckle type screw thread (8) at the head end and the outer buckle type screw thread (8) at the tail end can be connected together in an end-to-end mode.
2. A test method of an assembled trench debris flow simulation test device, using the assembled trench debris flow simulation test device of claim 1, comprising the steps of:
step 1, selecting three through channels (J) and two bending channels (K) to be sequentially connected to form an assembled channel (C), wherein the connection sequence is as follows: the method comprises the steps of (1) connecting an inner buckle screw thread (8) at the head end with an outer buckle screw thread (8) at the tail end to form an assembled channel (C) of a debris flow in an end-to-end connection mode, then obliquely fixing the assembled channel (C) on a lifting support (D), adjusting the gradient of the lifting support (D) to enable the gradient of the assembled channel (C) to be in line with the gradient of an actual debris flow channel, finally connecting a material box (A), a stirring lifter (B), an impact force testing system (E) and a stacking box (F) with the assembled channel (C), embedding a high-speed miniature camera (11) in the assembled channel (C) through the assembled channel (J), embedding a novel optical fiber sensor (12) in the assembled channel (K), and connecting the impact force testing system (E) with a model test system (H) through a data line (G), thus completing the assembly of the model test device;
step 2, after the device is assembled, placing the prepared debris flow material in a material box (A), throwing the debris flow material at an inlet of an assembled channel (C) through a stirring lifter (B), enabling the material to move downwards along the assembled channel (C), and enabling the material to fall into a stacking box (F) after impacting an impact force testing system (E) at the bottom end of the assembled channel (C);
step 3, when materials pass through a straight-through channel (J) of an assembly type channel (C), an embedded high-speed miniature camera (11) is arranged at the inner bottom of the straight-through channel (J) to shoot videos in the debris flow movement process, and when the materials pass through a bending channel (K) of the assembly type channel (C), a novel optical fiber sensor (12) arranged at the inner side surface of a bending channel bottom groove of the bending channel (K) tests the impact force of debris flow substances striking the channel at a turning part;
and 4, video data in the debris flow movement process shot by the high-speed miniature camera (11), impact force data of the debris flow substances tested by the novel optical fiber sensor (12) impacting a channel at a turning position and impact force data obtained by the material impacting an impact force testing system (E) at the bottom end of the assembled channel (C) are transmitted to a testing processing system (H) through a data line (G), so that kinetic parameters of the debris flow in the movement and impacting process can be calculated.
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CN110657906B (en) * 2019-10-23 2020-06-09 南京航空航天大学 Impact monitoring method based on fiber bragg grating sensor
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CN111650357A (en) * 2020-06-06 2020-09-11 中国有色金属工业昆明勘察设计研究院有限公司 Novel experimental device for simulating debris flow evolution process under complex condition
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