A simulation test device for rock-soil dual structure rainfall landslide based on laser ranging

Abstract

The present invention belongs to the field of geotechnical engineering technology, and specifically relates to a rock-soil binary structure rainfall landslide simulation test device based on laser ranging. It comprises a U-shaped groove, and two thickness adjustment structures are installed on the side walls of the U-shaped groove. The two thickness adjustment structures are symmetrically arranged on the side walls of the U-shaped groove. The thickness adjustment structure located at the bottom is used to adjust the thickness of the broken rock layer, and the thickness adjustment structure located at the top is used to adjust the thickness of the sand layer. The present invention is convenient for studying the influence of different thicknesses and proportions of the rock-soil binary structure on the landslide during rainfall, and convenient for studying the influence of different slope types of the rock-soil binary structure on the landslide during rainfall. The present invention can not only simulate the size of rainfall, but also realize the adjustment of rainfall angle, study the influence of different rainfall angles on landslide, and then comprehensively obtain reference test data, which are applied to actual landslide early warning work.

Description

Technical Field

[0001] The invention belongs to the technical field of geotechnical engineering, and in particular relates to a rock-soil dual structure rainfall landslide simulation test device based on laser ranging. Background Art

[0002] At present, the determination of the landslide formation threshold in the geological disaster risk prevention area is not very accurate and does not meet the application requirements. How to better apply the landslide test research to the practice of geological disaster prevention and control, and ensure that the application of the results is both in line with scientific reality and can actually reduce the burden of grassroots geological disaster prevention and control work, requires more detailed analysis and research on existing geological disaster risk prevention areas and potential danger areas, and continuous accumulation of experience to complete.

[0003] Rock-soil dual structure is a common soil structure on hillsides, which is usually composed of two main types of rocks or soils. These rocks or soils may have different physical properties, chemical compositions and formation processes. The formation of landslides in rock-soil dual structure is not only related to geological factors such as slope gradient, slope height and stratum occurrence, but also closely related to the interaction and mechanical property differences between the two rocks or soils.

[0004] The Chinese patent application number 201910681406.3 discloses a physical model test device and a test method for testing the stability of a landslide. The test device includes a test trough, in which a sliding bed, a sliding belt and a sliding body are stacked, and a laser rangefinder is provided inside the test trough for measuring and recording the displacement change of the sliding body during the landslide destruction process; it also includes a pore water pressure loading system, a pore water pressure measurement system buried in the sliding belt and a pore water pressure distribution system for realizing the change of the pore water pressure of the landslide, and the pore water pressure loading system is connected to the pore water pressure distribution system. The method for testing the stability of a landslide includes the following steps: stacking a landslide physical model in a test trough, adjusting the water pressure value of the pore water pressure loading system to a preset value p0, loading water pressure into the sliding belt until the pore water pressure in the sliding belt is consistent with the preset value and maintained; increasing the water pressure loading value step by step until the physical model of the landslide is destroyed; and quantitatively evaluating the stability of the landslide by calculating the safety margin value of the landslide.

[0005] For the binary structure of rock and soil, the factors that cause landslides are complex and diverse. In addition to rainfall, the rock and soil thickness ratio, slope type, angle and rainfall angle are all influencing factors. How to achieve rapid changes and adjustments in the rock and soil thickness ratio, slope type and angle during rainfall landslide simulation tests is the key to improving the efficiency of simulation tests and the accuracy of test results. Summary of the invention

[0006] In order to solve the shortcomings of the prior art, the present invention provides a rock-soil binary structure rainfall landslide simulation test device based on laser ranging. The present invention is convenient for studying the influence of different thicknesses and proportions of rock-soil binary structures on landslides during rainfall, and is convenient for studying the influence of different slope types of rock-soil binary structures on landslides during rainfall. The present invention can not only simulate the amount of rainfall, but also adjust the rainfall angle, study the influence of different rainfall angles on landslides, and then comprehensively obtain reference test data for application in actual landslide early warning work.

[0007] In order to achieve the above object, the present invention adopts the following technical solution:

[0008] A rock-soil dual structure rainfall landslide simulation test device based on laser ranging, comprising a U-shaped groove, two thickness adjustment structures are installed on the side walls of the U-shaped groove, and the two thickness adjustment structures are symmetrically arranged on the side walls of the U-shaped groove. The thickness adjustment structure located at the bottom is used to adjust the thickness of the broken rock layer, and the thickness adjustment structure located at the top is used to adjust the thickness of the sand layer;

[0009] A support structure is installed inside the U-shaped trough to support the test rock and soil. A rainmaker is installed on the top of the U-shaped trough to simulate rainfall. A plurality of laser rangefinders are fixed on the top inner wall of the U-shaped trough to monitor the height changes of the rock and soil.

[0010] Further, the thickness adjustment structure includes a threaded barrel and a screw, the screw is threadedly connected to the threaded barrel, one end of the screw is fixedly connected to the output end of the control motor, and the other end of the screw is fixedly provided with a rotating disk; a sliding frame is fixedly provided on one side of the control motor, and first sliding grooves are provided on both sides of the sliding frame; a first vertical groove is vertically provided in the middle of the side wall of the U-shaped groove, and the first sliding groove of the control motor is located in the first vertical groove and is slidably connected to the first vertical groove;

[0011] A connecting frame is provided in the middle of the first vertical slot, and the two connecting frames are fixedly connected by a fixing rod, and the fixing rod is slidably connected to the first vertical slot; the connecting frame includes two connecting plates, and the two connecting plates are fixedly connected by a receiving member, and a rotating groove is provided at the upper and lower ends of the receiving member, and the rotating disk of the screw is located in the rotating groove of the corresponding receiving member and is rotatably connected to the rotating groove.

[0012] Furthermore, an articulated frame is fixedly connected to the outer side of the threaded tube, and the articulated frame on the threaded tube is slidably connected to the first vertical groove; second vertical grooves are vertically opened on both sides of the side walls of the U-shaped groove, and an annular groove is fixedly provided in the middle of the second vertical groove, an articulated frame is rotatably connected to the annular groove, and an articulated frame is slidably connected to the second vertical groove located above and below the annular groove; first telescopic rods are hingedly connected to both ends of the articulated frame on the threaded tube and both ends of the connecting frame, the first telescopic rod corresponds to the articulated frame of the adjacent second vertical groove one by one, and the first telescopic rod is hinged to the corresponding articulated frame of the adjacent second vertical groove; a second telescopic rod is provided between adjacent articulated frames located on the same second vertical groove, and both ends of the second telescopic rod are respectively hinged to adjacent articulated frames.

[0013] Furthermore, an angle adjustment structure is installed on one side wall of the U-shaped groove, and the angle adjustment structure includes a support frame, which is fixedly connected to one side wall of the U-shaped groove; an electric telescopic rod is fixed on the support frame; a connecting plate is fixed on the connecting frame, and the output end of the electric telescopic rod is fixedly connected to the connecting plate.

[0014] Furthermore, the articulated frames at the bottom of the two first vertical slots are fixedly connected by a first connecting rod, and the first connecting rod is slidably connected to the first vertical slot; the articulated frames at the bottom of the adjacent second vertical slots on both side walls of the U-shaped slot are fixedly connected by a second connecting rod, and the second connecting rod is slidably connected to the corresponding second vertical slot;

[0015] The support structure includes two support plates, and a rotating tube is fixedly provided at the end of the support plate. The rotating tubes of the two support plates are staggered, and the rotating tube is sleeved on the first connecting rod and rotatably connected to the first connecting rod; one end of the support plate away from the rotating tube is placed on the corresponding second connecting rod.

[0016] Furthermore, the first telescopic rod includes a first outer tube and a first inner tube, the first outer tube is sleeved on the first inner tube and slidably connected to the first inner tube, the first outer tube is threadedly connected with a first limiting screw, and the first limiting screw is used to limit and fix the first inner tube.

[0017] Furthermore, the second telescopic rod includes a second outer tube and a second inner tube, the second outer tube is sleeved on the second inner tube and slidably connected to the second inner tube, the second outer tube is threadedly connected with a second limiting screw, and the second limiting screw is used to limit and fix the second inner tube.

[0018] Furthermore, the articulated frame includes two articulated plates, the articulated plates are hinged to the corresponding telescopic rods, a sliding rod is fixedly provided on one side of the articulated plate close to the U-shaped groove, and the sliding rod is located in the corresponding vertical groove.

[0019] Furthermore, the rain generator includes a mounting plate, which is fixedly installed on the top of the U-shaped groove. Two mounting grooves are symmetrically provided on the mounting plate. Fixed frames are provided at both ends of the mounting plate. A main water pipe and multiple branch water pipes are fixedly connected to the fixed frames. The multiple branch water pipes are all connected to the main water pipe. The branch water pipes are evenly arranged above the mounting groove. Multiple nozzles are evenly arranged in the mounting groove. The nozzles are connected to the branch water pipes through hoses.

[0020] Furthermore, a transmission motor and a plurality of second sliding grooves are installed on the mounting plate, a transmission tooth plate is slidably connected to the second sliding groove, an output shaft of the transmission motor is fixedly connected to a first transmission gear, and the first transmission gear is meshed with the transmission tooth plate; the nozzles are divided into multiple rows, and the nozzles in the same row are fixedly connected together through a transmission rod, a second transmission gear is fixedly provided on the transmission rod, and the second transmission gear is meshed with the transmission tooth plate.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] (1) The thickness and ratio between the sand layer and the broken rock layer can be adjusted by the thickness adjustment structure of the present invention, so as to facilitate the study of the influence of different thicknesses and ratios of the rock-soil binary structure on the landslide during rainfall. The rainfall condition is simulated by the rainmaker. When the rock-soil binary structure slides, a plurality of laser rangefinders are fixed on the top inner wall of the U-shaped groove to monitor the height change of the rock-soil, thereby obtaining reference test data for application in actual landslide early warning work. In actual application, when the thickness of the lower broken rock layer needs to be changed, the control motor of the thickness adjustment structure below is operated to drive the screw below to rotate, and the screw is limited under the limit of the connecting frame. , the rotating disk rotates in the rotating groove of the receiving part; the first telescopic rod is fixed and does not extend or retract, and the second telescopic rod is freely extended or retracted. At this time, the threaded barrel will move up and down relative to the screw rod, so that the distance between the bottom first telescopic rod and the middle first telescopic rod changes. Finally, the crushed rock layer is filled according to the distance reference between the upper and lower first telescopic rods, and then the thickness of the crushed rock layer is adjusted; when the thickness of the upper sand layer needs to be changed, the thickness adjustment structure above can be operated in the same way to quickly adjust the thickness and ratio between the sand layer and the crushed rock layer, so as to facilitate the study of the influence of different thicknesses and ratios of the rock-soil binary structure on landslides during rainfall.

[0023] (2) The present invention adopts the design of an angle adjustment structure. When it is necessary to adjust the slope and angle of the rock-soil binary structure, the electric telescopic rod is turned on, and the first telescopic rod is freely extended and retracted, while the second telescopic rod is fixed and does not extend and retract. At this time, the electric telescopic rod is operated to drive the connecting frame and the fixed rod to slide up and down in the first vertical groove. Since the articulated frame on the annular groove is rotatably connected to the annular groove, under the setting of the first telescopic rod and the second telescopic rod, the movement of the electric telescopic rod will drive the angle of the horizontally adjacent first telescopic rod to deflect, thereby realizing the change of three different slope types of concave, flat and convex structures, thereby facilitating the study of the influence of different slope types of the rock-soil binary structure on landslides during rainfall.

[0024] (3) The present invention adopts the structural design of the rain generator and the adjustment of the water volume, which can not only simulate the size of rainfall, but also control the sliding of the transmission gear plate through the transmission motor when it is necessary to simulate rainfall conditions at different angles. Since the second transmission gear is engaged with the transmission gear plate, the second transmission gear and the transmission rod are driven to rotate. The rotation of the transmission rod causes the fixedly connected nozzle to deflect, thereby realizing the adjustment of the rainfall angle and studying the influence of different rainfall angles on landslides. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of a rock-soil dual structure rainfall landslide simulation test device based on laser ranging of the present invention;

[0026] Figure 2 It is a schematic diagram of the cross-sectional structure of a rock-soil dual structure rainfall landslide simulation test device based on laser ranging in the present invention when in use;

[0027] Figure 3 It is a schematic diagram of the dispersed structure of a rock-soil dual structure rainfall landslide simulation test device based on laser ranging of the present invention;

[0028] Figure 4 A schematic diagram of a U-shaped trough structure of a rock-soil dual structure rainfall landslide simulation test device based on laser ranging according to the present invention;

[0029] Figure 5 It is a schematic diagram of the internal structure of a rock-soil dual structure rainfall landslide simulation test device based on laser ranging of the present invention;

[0030] Figure 6 It is a schematic diagram of the internal dispersed structure of a rock-soil dual structure rainfall landslide simulation test device based on laser ranging of the present invention;

[0031] Figure 7 The structure of the rainmaker of the rock-soil dual structure rainfall landslide simulation test device based on laser ranging is shown in the figure. Figure 1 ;

[0032] Figure 8 The structure of the rainmaker of the rock-soil dual structure rainfall landslide simulation test device based on laser ranging is shown in the figure. Figure 2 ;

[0033] Fig. 9 It is a partial schematic diagram of the angle adjustment structure of a rock-soil dual structure rainfall landslide simulation test device based on laser ranging of the present invention;

[0034] Fig.10 It is a schematic diagram of the local dispersed structure of a rock-soil dual structure rainfall landslide simulation test device based on laser ranging of the present invention;

[0035] Fig.11 The present invention is a partial schematic diagram of the thickness adjustment structure of a rock-soil dual structure rainfall landslide simulation test device based on laser ranging.

[0036] The reference numerals are as follows:

[0037] U-shaped groove-100; first vertical groove-110; second vertical groove-120; annular groove-121; thickness adjustment structure-200; threaded tube-210; screw-220; rotating disk-221; control motor-230; sliding frame-231; first sliding groove-232; fixed rod-240; second telescopic rod-300; second outer tube-310; second inner tube-320; second limiting screw-330; first telescopic rod-400; first outer tube-410; first inner tube-420; first limiting screw-430; rainmaker-500; mounting plate-510; mounting groove-511; main water pipe-520; branch water pipe-521 ;Fixed frame-530;Nozzle-540;Hose-541;Transmission rod-550;Second transmission gear-560;Transmission gear plate-570;Transmission motor-580;First transmission gear-581;Second sliding groove-590;Support structure-600;Support plate-610;Rotating tube-620;First connecting rod-630;Second connecting rod-640;Hinged frame-700;Hinged plate-701;Sliding rod-702;Connecting frame-710;Connecting plate-711;Connecting piece-712;Angle adjustment structure-800;Support frame-810;Electric telescopic rod-820;Connecting plate-830;Laser rangefinder-900. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention is further described in detail below in conjunction with the embodiments. Of course, the specific embodiments described here are only used to explain the present invention and are not used to limit the present invention.

[0039] Although the steps in the present invention are arranged with numbers, they are not used to limit the order of the steps. Unless the order of the steps is clearly stated or the execution of a certain step requires other steps as a basis, the relative order of the steps can be adjusted. It is understood that the term "and / or" used in this article involves and covers any and all possible combinations of one or more of the associated listed items.

[0040] Example

[0041] like Figures 1 to 11 As shown, a rock-soil dual structure rainfall landslide simulation test device based on laser ranging includes a U-shaped groove 100, and two thickness adjustment structures 200 are installed on the side walls of the U-shaped groove 100. The two thickness adjustment structures 200 are symmetrically arranged on the side walls of the U-shaped groove 100. The thickness adjustment structure 200 located at the bottom is used to adjust the thickness of the broken rock layer, and the thickness adjustment structure 200 located at the top is used to adjust the thickness of the sand layer;

[0042] It is worth noting that the width of the U-shaped groove 100 can be adjusted according to actual conditions and is not further limited here.

[0043] A support structure 600 is installed inside the U-shaped trough 100 for supporting the test rock and soil. A rainmaker 500 is installed on the top of the U-shaped trough 100 for simulating rainfall. A plurality of laser rangefinders 900 are fixed on the top inner wall of the U-shaped trough 100 for monitoring the height changes of the rock and soil.

[0044] The thickness and ratio between the sand layer and the broken rock layer can be adjusted by the thickness adjustment structure 200 of the present invention, so as to facilitate the study of the influence of different thicknesses and ratios of the rock-soil binary structure on the landslide during rainfall. The rainfall condition is simulated by the rainmaker 500. When a landslide occurs in the rock-soil binary structure, a plurality of laser rangefinders 900 are fixedly provided on the top inner wall of the U-shaped trough 100 to monitor the height change of the rock-soil, thereby obtaining reference test data, which is applied to the actual landslide early warning work, and will be further described later.

[0045] Further, the thickness adjustment structure 200 includes a threaded barrel 210 and a screw rod 220, the screw rod 220 is screwed to the threaded barrel 210, one end of the screw rod 220 is fixedly connected to the output end of the control motor 230, and the other end of the screw rod 220 is fixedly provided with a rotating disk 221; a sliding frame 231 is fixedly provided on one side of the control motor 230, and first sliding grooves 232 are provided on both sides of the sliding frame 231; a first vertical groove 110 is vertically provided in the middle of the side wall of the U-shaped groove 100, and the first sliding groove 232 of the control motor 230 is located in the first vertical groove 110 and is slidably connected to the first vertical groove 110;

[0046] It is worth noting that the control motor 230, laser rangefinder 900 and other power equipment of the present invention are all powered and controlled by an external power supply system, which will not be described in detail here.

[0047] A connecting frame 710 is provided in the middle of the first vertical slot 110, and the two connecting frames 710 are fixedly connected by a fixing rod 240, and the fixing rod 240 is slidably connected to the first vertical slot 110; the connecting frame 710 includes two connecting plates 711, and the two connecting plates 711 are fixedly connected by a receiving member 712, and the upper and lower ends of the receiving member 712 are provided with a rotating groove, and the rotating disk 221 of the screw rod 220 is located in the rotating groove of the corresponding receiving member 712 and is rotatably connected to the rotating groove.

[0048] Furthermore, an articulated frame 700 is fixedly connected to the outer side of the threaded barrel 210, and the articulated frame 700 on the threaded barrel 210 is slidably connected to the first vertical groove 110; second vertical grooves 120 are vertically opened on both sides of the side wall of the U-shaped groove 100, and an annular groove 121 is fixedly provided in the middle of the second vertical groove 120, and an articulated frame 700 is rotatably connected to the annular groove 121, and an articulated frame 700 is slidably connected to the second vertical groove 120 located above and below the annular groove 121. ; Both ends of the articulated frame 700 on the threaded cylinder 210 and both ends of the connecting frame 710 are hinged with the first telescopic rod 400, the first telescopic rod 400 corresponds to the articulated frame 700 of the adjacent second vertical slot 120 one by one, and the first telescopic rod 400 is hinged to the corresponding articulated frame 700 of the adjacent second vertical slot 120; a second telescopic rod 300 is provided between adjacent articulated frames 700 located on the same second vertical slot 120, and both ends of the second telescopic rod 300 are respectively hinged to the adjacent articulated frames 700.

[0049] In actual use, when it is necessary to change the thickness of the lower broken rock layer, the control motor 230 located at the lower thickness adjustment structure 200 is operated to drive the lower screw rod 220 to rotate. Under the limit of the connecting frame 710, the rotating disk 221 rotates in the rotating groove of the receiving member 712; the first telescopic rod 400 is fixed and does not extend or retract, and the second telescopic rod 300 is freely extended or retracted. At this time, the threaded cylinder 210 will move up and down relative to the screw rod 220, so that the distance between the bottom first telescopic rod 400 and the middle first telescopic rod 400 changes. Finally, the broken rock layer is filled according to the distance reference between the upper and lower first telescopic rods 400, and the thickness of the broken rock layer is adjusted. When it is necessary to change the thickness of the upper sand layer, the upper thickness adjustment structure 200 can be operated in the same way to quickly adjust the thickness and ratio between the sand layer and the broken rock layer, so as to facilitate the study of the influence of different thicknesses and ratios of the rock-soil binary structure on landslides during rainfall.

[0050] Furthermore, an angle adjustment structure 800 is installed on one side wall of the U-shaped groove 100, and the angle adjustment structure 800 includes a support frame 810, and the support frame 810 is fixedly connected to one side wall of the U-shaped groove 100; an electric telescopic rod 820 is fixed on the support frame 810; a receiving plate 830 is fixed on the connecting frame 710, and the output end of the electric telescopic rod 820 is fixedly connected to the receiving plate 830.

[0051] Through the design of the angle adjustment structure 800, when it is necessary to adjust the slope and angle of the rock-soil binary structure, the electric telescopic rod 820 is turned on, and the first telescopic rod 400 is freely telescopic, and the second telescopic rod 300 is fixed and does not telescope. At this time, the electric telescopic rod 820 is operated, so that the operation of the electric telescopic rod 820 drives the connecting frame 710 and the fixed rod 240 to slide up and down in the first vertical groove 110; since the articulated frame 700 on the annular groove 121 is rotatably connected to the annular groove 121, under the setting of the first telescopic rod 400 and the second telescopic rod 300, the operation of the electric telescopic rod 820 will drive the angle of the horizontally adjacent first telescopic rod 400 to deflect, thereby realizing the changes of three different slope types of concave, flat and convex structures, thereby facilitating the study of the influence of different slope types of the rock-soil binary structure on landslides during rainfall.

[0052] It is worth noting that when only the angle adjustment structure 800 is controlled to operate, the distance between the upper and lower first telescopic rods 400 will also change. If only the angle needs to be changed, it can be adjusted through the cooperation of the thickness adjustment structure 200.

[0053] When the angle adjustment structure 800 is adjusted, since the first sliding slot 232 of the control motor 230 is located in the first vertical slot 110 and is slidably connected to the first vertical slot 110 , the control motor 230 will move up and down along the first vertical slot 110 .

[0054] Furthermore, the articulated frames 700 at the bottom of the two first vertical slots 110 are fixedly connected by a first connecting rod 630, and the first connecting rod 630 is slidably connected to the first vertical slot 110; the articulated frames 700 at the bottom of the adjacent second vertical slots 120 on both side walls of the U-shaped slot 100 are fixedly connected by a second connecting rod 640, and the second connecting rod 640 is slidably connected to the corresponding second vertical slot 120;

[0055] The support structure 600 includes two support plates 610, and a rotating tube 620 is fixedly provided at the end of the support plate 610. The rotating tubes 620 of the two support plates 610 are staggered, and the rotating tube 620 is sleeved on the first connecting rod 630 and rotatably connected to the first connecting rod 630; the end of the support plate 610 away from the rotating tube 620 is placed on the corresponding second connecting rod 640.

[0056] Through the cooperation of the two support plates 610 of the support structure 600, the first connecting rod 630 and the second connecting rod 640 can be deflected to facilitate the automatic adjustment of the support structure 600 and the filling of the geotechnical structure.

[0057] Furthermore, the first telescopic rod 400 includes a first outer tube 410 and a first inner tube 420, the first outer tube 410 is sleeved on the first inner tube 420 and is slidably connected to the first inner tube 420, and a first limiting screw 430 is threadedly connected to the first outer tube 410, and the first limiting screw 430 is used to limit and fix the first inner tube 420.

[0058] Furthermore, the second telescopic rod 300 includes a second outer tube 310 and a second inner tube 320, the second outer tube 310 is sleeved on the second inner tube 320 and is slidably connected to the second inner tube 320, and a second limiting screw 330 is threadedly connected to the second outer tube 310, and the second limiting screw 330 is used to limit and fix the second inner tube 320.

[0059] The first telescopic rod 400 and the second telescopic rod 300 have the same structure. When the first telescopic rod 400 and the second telescopic rod 300 need to be fixed and not telescopic, tighten the corresponding first limit screw 430 and the second limit screw 330 to fix them. When the first telescopic rod 400 and the second telescopic rod 300 need to be freely telescopic, loosen the corresponding first limit screw 430 and the second limit screw 330 to achieve it.

[0060] Furthermore, the articulated frame 700 includes two articulated plates 701 , the articulated plates 701 are articulated with corresponding telescopic rods, and a sliding rod 702 is fixedly provided on one side of the articulated plate 701 close to the U-shaped groove 100 , and the sliding rod 702 is located in the corresponding vertical groove.

[0061] It is worth mentioning that the sliding rod 702 can also assist the filling rock and soil structure. By using the auxiliary movable plate, the auxiliary movable plate is abutted against the corresponding sliding rod 702, so that the auxiliary movable plate and the U-shaped groove 100 and the supporting structure 600 form a nearly closed structure, which is convenient for the filling rock and soil to be finalized. No detailed description is given here.

[0062] Furthermore, the rain generator 500 includes a mounting plate 510, which is fixedly mounted on the top of the U-shaped groove 100. Two mounting grooves 511 are symmetrically provided on the mounting plate 510. Fixed frames 530 are provided at both ends of the mounting plate 510. A main water pipe 520 and multiple branch water pipes 521 are fixedly connected to the fixed frames 530. The multiple branch water pipes 521 are all connected to the main water pipe 520. The branch water pipes 521 are evenly arranged above the mounting groove 511. Multiple nozzles 540 are evenly arranged in the mounting groove 511. The nozzles 540 are connected to the branch water pipes 521 through hoses 541.

[0063] It is worth noting that the main water pipe 520 can be connected to an external water supply system for water supply, which is not further limited here.

[0064] Furthermore, a transmission motor 580 and a plurality of second sliding grooves 590 are installed on the mounting plate 510, a transmission tooth plate 570 is slidably connected to the second sliding groove 590, an output shaft of the transmission motor 580 is fixedly connected to a first transmission gear 581, and the first transmission gear 581 is meshed with the transmission tooth plate 570; the nozzles 540 are divided into multiple rows, and the nozzles 540 in the same row are fixedly connected together through a transmission rod 550, a second transmission gear 560 is fixedly provided on the transmission rod 550, and the second transmission gear 560 is meshed with the transmission tooth plate 570.

[0065] It is worth noting that the transmission motor 580 and the control motor 230 of the present invention are both forward and reverse motors, which can rotate forward or reverse, and will not be described in detail here.

[0066] The present invention can simulate not only the amount of rainfall but also the amount of water through the structural design of the rainmaker 800. When it is necessary to simulate rainfall conditions at different angles, the transmission motor 580 is used to control the sliding of the transmission gear plate 570. Since the second transmission gear 560 is meshed with the transmission gear plate 570, the second transmission gear 560 and the transmission rod 550 are driven to rotate. The rotation of the transmission rod 550 causes the fixedly connected nozzle 540 to deflect, thereby realizing the adjustment of the rainfall angle and studying the influence of different rainfall angles on landslides.

[0067] The above is only a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements and changes without departing from the creative concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A rock-soil dual structure rainfall landslide simulation test device based on laser ranging, characterized in that: It comprises a U-shaped groove (100), wherein two thickness adjustment structures (200) are installed on the side walls of the U-shaped groove (100), and the two thickness adjustment structures (200) are symmetrically arranged on the side walls of the U-shaped groove (100) up and down, the thickness adjustment structure (200) located at the bottom is used to adjust the thickness of the broken rock layer, and the thickness adjustment structure (200) located at the top is used to adjust the thickness of the sand layer; A support structure (600) is installed inside the U-shaped trough (100) for supporting test rock and soil, and a rainmaker (500) is installed on the top of the U-shaped trough (100) for simulating rainfall; a plurality of laser rangefinders (900) are fixedly provided on the inner wall of the top of the U-shaped trough (100) for monitoring the height change of the rock and soil; The thickness adjustment structure (200) comprises a threaded barrel (210) and a screw rod (220), wherein the screw rod (220) is threadedly connected to the threaded barrel (210), one end of the screw rod (220) is fixedly connected to the output end of the control motor (230), and the other end of the screw rod (220) is fixedly provided with a rotating disk (221); a sliding frame (231) is fixedly provided on one side of the control motor (230), and first sliding grooves (232) are provided on both sides of the sliding frame (231); a first vertical groove (110) is vertically provided in the middle of the side wall of the U-shaped groove (100), and the first sliding groove (232) of the control motor (230) is located in the first vertical groove (110) and is slidably connected to the first vertical groove (110); A connecting frame (710) is provided in the middle of each of the first vertical slots (110), and the two connecting frames (710) are fixedly connected by a fixing rod (240), and the fixing rod (240) is slidably connected to the first vertical slot (110); the connecting frame (710) comprises two connecting plates (711), and the two connecting plates (711) are fixedly connected by a receiving member (712), and the upper and lower ends of the receiving member (712) are provided with a rotating groove, and the rotating disk (221) of the screw rod (220) is located in the rotating groove of the corresponding receiving member (712) and is rotatably connected to the rotating groove; The outer side of the threaded cylinder (210) is fixedly connected with an articulated frame (700), and the articulated frame (700) on the threaded cylinder (210) is slidably connected to the first vertical groove (110); second vertical grooves (120) are vertically opened on both sides of the side wall of the U-shaped groove (100), and an annular groove (121) is fixedly provided in the middle of the second vertical groove (120), and an articulated frame (700) is rotatably connected to the annular groove (121), and an articulated frame (700) is slidably connected to the second vertical groove (120) located above and below the annular groove (121); the threaded cylinder (210) is fixedly connected with an articulated frame (700) on the outer side of the threaded cylinder (210), and the articulated frame (700) is slidably connected to the second vertical groove (120) located above and below the annular groove (121); Both ends of the articulated frame (700) on the corrugated cylinder (210) and both ends of the connecting frame (710) are hingedly connected with first telescopic rods (400), the first telescopic rods (400) correspond one-to-one to the articulated frames (700) of the adjacent second vertical slots (120), and the first telescopic rods (400) are hingedly connected to the corresponding articulated frames (700) of the adjacent second vertical slots (120); a second telescopic rod (300) is provided between adjacent articulated frames (700) located on the same second vertical slot (120), and both ends of the second telescopic rod (300) are respectively hingedly connected to the adjacent articulated frames (700).

2. The laser ranging based rock-soil dual structure rainfall landslide simulation test device according to claim 1, characterized in that: An angle adjustment structure (800) is installed on one side wall of the U-shaped groove (100), and the angle adjustment structure (800) comprises a support frame (810), and the support frame (810) is fixedly connected to one side wall of the U-shaped groove (100); an electric telescopic rod (820) is fixed on the support frame (810); and a receiving plate (830) is fixed on the connecting frame (710), and an output end of the electric telescopic rod (820) is fixedly connected to the receiving plate (830).

3. The rock-soil dual structure rainfall landslide simulation test device based on laser ranging according to claim 1 is characterized in that: The articulated frames (700) at the bottom of the two first vertical grooves (110) are fixedly connected via a first connecting rod (630), and the first connecting rod (630) is slidably connected to the first vertical groove (110); the articulated frames (700) at the bottom of the adjacent second vertical grooves (120) on both side walls of the U-shaped groove (100) are fixedly connected via a second connecting rod (640), and the second connecting rod (640) is slidably connected to the corresponding second vertical groove (120); The support structure (600) comprises two support plates (610), and a rotating tube (620) is fixedly provided at the end of the support plate (610). The rotating tubes (620) of the two support plates (610) are staggered, and the rotating tube (620) is sleeved on the first connecting rod (630) and is rotatably connected to the first connecting rod (630); one end of the support plate (610) away from the rotating tube (620) is mounted on the corresponding second connecting rod (640).

4. According to claim 1, a rock-soil dual structure rainfall landslide simulation test device based on laser ranging is characterized in that: The first telescopic rod (400) comprises a first outer tube (410) and a first inner tube (420); the first outer tube (410) is sleeved on the first inner tube (420) and is slidably connected to the first inner tube (420); a first limiting screw (430) is threadedly connected to the first outer tube (410); the first limiting screw (430) is used to limit and fix the first inner tube (420).

5. The rock-soil dual structure rainfall landslide simulation test device based on laser ranging according to claim 1, characterized in that: The second telescopic rod (300) comprises a second outer tube (310) and a second inner tube (320); the second outer tube (310) is sleeved on the second inner tube (320) and is slidably connected to the second inner tube (320); a second limiting screw (330) is threadedly connected to the second outer tube (310); the second limiting screw (330) is used to limit and fix the second inner tube (320).

6. The rock-soil dual structure rainfall landslide simulation test device based on laser ranging according to claim 1, characterized in that: The hinged frame (700) comprises two hinged plates (701), wherein the hinged plates (701) are hinged to corresponding telescopic rods, and a sliding rod (702) is fixedly provided on one side of the hinged plate (701) close to the U-shaped groove (100), and the sliding rod (702) is located in the corresponding vertical groove.

7. The rock-soil dual structure rainfall landslide simulation test device based on laser ranging according to claim 1, characterized in that: The rain generator (500) comprises a mounting plate (510), wherein the mounting plate (510) is fixedly mounted on the top of the U-shaped groove (100), wherein two mounting grooves (511) are symmetrically provided on the mounting plate (510), wherein fixing frames (530) are provided at both ends of the mounting plate (510), wherein a main water pipe (520) and a plurality of branch water pipes (521) are fixedly connected to the fixing frames (530), wherein the plurality of branch water pipes (521) are all connected to the main water pipe (520), wherein the branch water pipes (521) are evenly arranged above the mounting groove (511), wherein a plurality of nozzles (540) are evenly arranged in the mounting groove (511), and wherein the nozzles (540) are connected to the branch water pipes (521) via hoses (541).

8. The laser ranging based rock-soil dual structure rainfall landslide simulation test device according to claim 7, characterized in that: A transmission motor (580) and a plurality of second sliding grooves (590) are mounted on the mounting plate (510); a transmission tooth plate (570) is slidably connected to the second sliding groove (590); an output shaft of the transmission motor (580) is fixedly connected to a first transmission gear (581), and the first transmission gear (581) is meshed with the transmission tooth plate (570); the nozzles (540) are divided into a plurality of rows, and the nozzles (540) in the same row are fixedly connected together via a transmission rod (550); a second transmission gear (560) is fixedly provided on the transmission rod (550), and the second transmission gear (560) is meshed with the transmission tooth plate (570).

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