A multi-scenario simulation miniature pile reinforcement model test device

Abstract

The present application relates to a kind of multi-scenario simulation micro pile reinforcement model test device. Including model box, it further includes the sliding baffle that can slide along left and right direction, the front and rear sides of bottom plate are symmetrically provided with two guide rails extending along left and right direction;Slope forming press plate includes horizontal press plate and forming inclined plate by hinged shaft mutually hinged, horizontal press plate, forming inclined plate and hinged shaft can be telescopic along left and right direction;The sliding crossbeam of loading device is slidably assembled on slide rail by the sliding portion of both ends to be freely slid along slide rail, servo jack is provided below sliding crossbeam to be used for the slope loading after forming;Rainfall simulation device includes water pump, water pipe, spray pipe and multiple spray heads arranged on spray pipe;Seismic simulation device includes upper and lower platforms and multiple springs connected between the two, and the longitudinal exciter and transverse exciter for simulating seismic waves are further provided on the upper platform, and the model box and loading device are fixed on the upper platform;Pouring tooling.

Description

Technical Field

[0001] This invention relates to a multi-scenario simulation micropile reinforcement model test device. Background Technology

[0002] Landslides are a frequent occurrence in nature, often causing significant damage to industrial and agricultural production and endangering people's lives and property. Significant progress has been made in landslide prevention both domestically and internationally. Common prevention measures include drainage, anti-slide pile reinforcement, retaining walls, and weight reduction and slope cutting. Currently, micropiles are widely used in slope engineering. Numerous engineering examples demonstrate that micropiles cause minimal disturbance to the landslide body, exhibit strong site adaptability and bending resistance, and can provide anchoring to the sliding bed and landslide body, significantly improving the overall stability of the landslide and contributing to the overall shear strength of the sliding surface. However, the precise application of micropiles in various scenarios to achieve better prevention results lacks scientific theoretical support. Furthermore, existing testing devices are limited in function and can only simulate a limited range of scenarios. For example, research on the bearing capacity of micropiles under different rainfall levels, earthquake magnitudes, emergency rescue, and pressure scenarios, corresponding to different pile spacings, lacks usable testing equipment in current technology. The specific situation is as follows:

[0003] Firstly, in slope protection engineering, the spacing between piles plays a decisive role in the formation of the soil arching effect. When the sliding force generated by the landslide acts on the anti-slide piles, the coupling effect between the piles and the soil will produce soil arching, improving the anti-slide effect of the structure. Traditionally, the selection of pile spacing has been relatively conservative. To consider economic benefits, determining a reasonable pile spacing is of great importance. In order to study the soil arching effect and determine a reasonable pile spacing, it is necessary to study the influence of the pile spacing on the formation of the soil arching effect. Indoor model tests are often conducted to observe the stress-strain characteristics of the pile body. However, when conducting indoor model tests, the slope formation is difficult to control. On the one hand, it is difficult to control the slope angle; on the other hand, conventional test equipment model boxes are fixed-size square boxes, which have the problems of large backfill volume and low efficiency for tests with small pile spacing.

[0004] In addition, rainfall, earthquakes, soil weight, and surface water soaking can all cause landslides. Different causes often require targeted experiments to analyze landslides.

[0005] Furthermore, after a landslide, emergency slope reinforcement is necessary to prevent secondary collapse. This requires the use of micropiles made from non-aqueous reactive polymer materials, which can be temporarily cast and rapidly molded. These materials are characterized by an anhydrous reaction, short setting time, rapid strength gain (reaching 90% of ultimate strength in just 15 minutes), and high tensile and compressive strength. They also require no curing and are pollution-free. Therefore, this material is considered for emergency slope support. However, practical application experience requires simulation experiments to obtain empirical data. Therefore, simulations of micropile molding under emergency rescue scenarios and post-molding performance studies are also needed. Summary of the Invention

[0006] The purpose of this invention is to provide a multi-scenario simulated micropile reinforcement model test device that can simulate complex scenarios such as rainfall, earthquakes, emergency rescue, and combinations of various scenarios, enabling experimental research on ordinary micropile and non-aqueous reactive polymer micropile.

[0007] The technical solution of the present invention is as follows: A multi-scenario simulation micropile reinforcement model test device includes:

[0008] The model box is a rectangular box structure with an opening at the top. It includes front, rear, and right side panels and a bottom plate that are fixedly connected. It also includes a sliding baffle that can slide in the left and right direction. Two guide rails extending in the left and right direction are arranged parallel and symmetrically on the front and rear sides of the bottom plate. The lower sides of the sliding baffle are slidably mounted on the guide rails by sliders. The guide rails are provided with locking structures for locking the sliders relative to the guide rails. The upper sides of the front and rear side panels are respectively provided with a row of bolt holes extending in the left and right direction. The upper part of the sliding baffle can be fixed relative to the front and rear side panels by bolts.

[0009] The slope forming plate includes a horizontal plate and a forming inclined plate that are hinged to each other by a hinge shaft. The horizontal plate, the forming inclined plate and the hinge shaft can extend and retract in the left and right directions.

[0010] The loading device includes multiple columns and two fixed crossbeams fixed to the top of the columns. The two fixed crossbeams are symmetrically and parallelly arranged on the front and rear sides above the model box. Slide rails are laid on the two fixed crossbeams respectively. Two sliding crossbeams are erected between the two slide rails. The sliding crossbeams are slidably assembled on the slide rails through sliding parts at both ends so that they can slide freely along the slide rails. Servo jacks are set below the sliding crossbeams for loading the slope after it is formed.

[0011] The rainfall simulation device includes a water pump, water pipes, sprinkler pipes, and multiple nozzles installed on the sprinkler pipes. The sprinkler pipes are slidably mounted between two slide rails via a sliding pipe clamp that can move along the slide rails.

[0012] The earthquake simulation device includes upper and lower platforms and multiple springs connected between them. The upper platform is also equipped with longitudinal and transverse exciters for simulating earthquake waves. The model box and loading device are fixed on the upper platform.

[0013] The casting equipment includes a steel pipe for insertion into the slope soil to simulate a pile hole and a casting pipe fixed inside the lower part of the steel pipe. Multiple grouting holes are provided at the bottom and sides of the casting bucket.

[0014] Furthermore, the right-side baffle is made of a transparent material.

[0015] Furthermore, three sets of bolt holes are evenly distributed along the left and right directions on the front and rear side baffles, arranged vertically. Each set includes two rows of symmetrically arranged bolt holes. The sliding baffle can be selectively connected and fixed to one of the sets of bolt holes by right-angle steel.

[0016] Furthermore, symmetrical grooves are provided on the right side baffle and the sliding baffle. The grooves are horizontally arranged, and an adjusting slider is slidably assembled in the groove. Inclined plate grooves are symmetrically provided on the left and right sides of the forming inclined plate, and the outer end of the adjusting slider is slidably engaged with the inclined plate groove.

[0017] Furthermore, a protractor for detecting the tilt angle of the shaped inclined plate is fixed to the right end of the hinge shaft.

[0018] Furthermore, the sliding pipe clamp seat is connected to the spray pipe via a pipe clamp, and the pipe clamp can be rotatably mounted on the sliding pipe clamp seat along a vertical axis.

[0019] Furthermore, L-shaped support plates are provided at the lower ends of both ends of the sliding crossbeam, and the support plates are in contact with the lower surface of the corresponding fixed crossbeam.

[0020] The beneficial effects of the present invention: The multi-scenario simulation micropile reinforcement model test device of the present invention has the following advantages that cannot be replaced by the prior art when in use:

[0021] (1) It can conveniently study the characteristics of micropiles with different pile spacings. The size of its model box can be freely adjusted to adapt to different pile spacings, and the loading position of the corresponding loading device can also be adjusted accordingly. It is very convenient to study the influence of different pile spacings on the soil arching effect. Moreover, for the study of small pile spacing, the amount of soil filling in its model box is not so much, which saves manpower and improves the experimental efficiency.

[0022] (2) It can simulate various real-world scenarios, such as heavy rain, light rain, earthquakes, earthquakes followed by rain, and emergency rescue construction to prevent secondary landslides after a landslide. The controller, based on existing data such as frequency and amplitude during an actual earthquake, controls the vibrator to oscillate according to the data, thereby simulating real earthquake scenarios. This allows for the simulation of the anti-landslide performance of different micropiles, micropiles with different spacings, and micropiles made of different materials under these scenarios. Similarly, it can study various data under rainy conditions. It can also simulate emergency rescue construction in emergency situations, such as a second landslide occurring after the initial landslide and subsequent aftershocks. The program first simulates a scenario where an earthquake causes a landslide, followed by a second aftershock 20 minutes later, causing a second landslide. It also simulates the process of pouring a non-aqueous reactive polymer slurry to form micropiles during this intermediate period, studying their setting and anti-sliding properties. In real-world scenarios, most disasters are not singular; therefore, simulating reality is the most important function of this experimental device. According to the program settings, this device can utilize various simulation modules to work synchronously and in combination, simulating multiple complex scenarios and conducting experimental research on micropiles under these conditions.

[0023] Furthermore, the angle of slope formation is easy to control. The angle can be easily verified by using a protractor. Moreover, the slope forming pressure plate, the right side baffle, and the sliding baffle are connected by a slide groove, an inclined slide groove, and an adjusting slider, which makes it more flexible and convenient to adjust the angle. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of a multi-scenario simulation micropile reinforcement model test device according to an embodiment of the present invention (the earthquake simulation device is not shown).

[0025] Figure 2 This is a schematic diagram of the model box structure;

[0026] Figure 3 This is a schematic diagram of the connection structure between the sliding baffle and the front baffle.

[0027] Figure 4 A schematic diagram of the combined structure of the slope forming pressure plate;

[0028] Figure 5 for Figure 4 Structural diagram before assembly;

[0029] Figure 6 This is a structural diagram showing the fit between the forming inclined plate and the sliding baffle of the slope forming pressure plate;

[0030] Figure 7 This is a schematic diagram of the loading device.

[0031] Figure 8 This is a schematic diagram of the structure of the rainfall simulation device in use;

[0032] Figure 9 This is a schematic diagram of the earthquake simulation device in use.

[0033] Figure 10 This is a schematic diagram of the main structure of the earthquake simulation device;

[0034] Figure 11 for Figure 10 A schematic diagram of the structure viewed from below;

[0035] Figure 12 A schematic diagram of the casting fixture used for casting non-aqueous reactive polymer micropiles;

[0036] Figure 13 A bottom view of the pouring equipment;

[0037] In the diagram: 1-Model box, 11-Front side baffle, 12-Rear side baffle, 13-Right side baffle, 131-Slide groove, 132-Adjusting slider, 14-Sliding baffle, 15-Guide rail, 16-Slider, 17-Bolt hole, 18-Right angle steel, 19-Double-ended bolt, 20-Ordinary bolt, 2-Slope forming pressure plate, 21-Horizontal pressure plate, 22-Forming inclined plate, 221-Inclined plate slide groove, 23-Hinge shaft, 24-Protractor plate, 25-Connecting plate, 3-Loading device, 31-Column, 32-Fixed 33-Crossbeam, 34-Sliding crossbeam, 341-Sliding part, 35-Servo jack, 36-Pattern, 4-Rainfall simulation device, 41-Water pump, 42-Water pipe, 43-PVC sprinkler pipe, 44-Pipe clamp and sliding pipe clamp seat, 45-Sprinkler head, 5-Earthquake simulation device, 51-Upper platform, 52-Lower platform, 53-Spring, 54-Longitudinal vibrator, 55-Transverse vibrator, 6-Pouring fixture, 61-Groove hole, 62-Steel pipe, 7-3D laser scanner, 8-Sealing plate. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the invention and are not intended to limit the invention; that is, the described embodiments are merely some embodiments of the invention, and not all embodiments. The components of the embodiments of the invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0039] An embodiment of the multi-scenario simulation micropile reinforcement model test device of the present invention: This test device is used for experimental research on micropile, such as... Figure 1-13As shown, the main structure includes a model box 1, a slope forming pressure plate 2, a loading device 3, a rainfall simulation device 4, an earthquake simulation device 5, and a pouring fixture 6.

[0040] like Figure 1 , 2 As shown, the model box 1 is a square box structure, including a base plate, a front baffle 11, a rear baffle 12, a right baffle 13, and a sliding baffle 14 on the left side. The recommended dimensions of the model box 1 are 2m in length, 1.5m in width, and 1.5m in height. The model box 1 is a steel plate assembly structure, and all plates except the sliding baffle 14 are fixed structures. The right baffle 13, corresponding to the sliding baffle 14, is made of transparent material, such as PC transparent sheet, transparent nylon, or acrylic. Parallel guide rails 15 are provided at the corners where the base plate connects to the front and rear baffles. The guide rails 15 have a frustum-shaped cross-section, and sliders are slidably mounted on each guide rail 15. The two sliders are welded and fixed to the two lower corners of the sliding baffle 14. The sliding baffle 14 slides freely along the guide rails 15 using the two sliders. Locking nuts are also provided on the two sliders to lock them relative to the guide rails 15, preventing them from moving along the guide rails 15. Figure 2 As shown, the front baffle 11 and the rear baffle 12 are respectively provided with a row of spaced bolt holes. The two rows of bolt holes are located in the same horizontal plane and are coaxially corresponding. When the sliding baffle 14 needs to be locked at a certain position, it can be fixed to the bolt hole closest to the sliding baffle 14 on the outside of the sliding baffle 14 (i.e., the side facing the outside of the box) by bolts. The bolts will stop the sliding baffle 14. After being stopped, the sliding baffle 14 can no longer move. At this time, soil can be filled into the box. Through the setting of this structure, the volume of the model box 1 can be freely adjusted. When studying micropiles with small pile spacing, by adjusting the position of the sliding baffle 14 to adjust to a small volume model box 1, the amount of soil to be filled into the model box 1 is smaller, the amount of cleaning work after the test is also reduced accordingly, and the filling speed is faster, greatly improving the test efficiency.

[0041] In the study of micropiles, some pile spacings are commonly used. In these cases, the sliding baffle 14 is frequently positioned in certain common locations. To improve the load-bearing capacity of the sliding baffle 14 during frequent use, three sets of vertically spaced bolt holes are arranged at intervals along the extension direction of the guide rail 15 on the front baffle 11 and rear baffle 12, with each set corresponding to two rows of bolt holes. Right-angle steel 18 and bolts can then be used to firmly fix the sliding baffle 14 to the front baffle 11 and rear baffle 12. Figure 2 , 3As shown, each side of the sliding baffle 14 has an angle steel 18 on each of its two sides. The angle steel 18 and the sliding baffle 14 are provided with corresponding bolt holes. The two angle steels 18 on both sides are connected to the sliding baffle 14 by double-headed bolts 19 and two sets of nuts. The angle steel 18 is connected to the front side plate and the rear side plate by ordinary bolts 20 and nuts.

[0042] like Figure 4 , 5 As shown, the slope forming plate 2 includes a horizontal plate 21 and a forming inclined plate 22. Both the horizontal plate 21 and the forming inclined plate 22 are composed of inner plates and outer plates that are nested together in the left-right direction. The horizontal plate 21 and the forming inclined plate 22 are hinged together by a hinge shaft 23, which is also composed of an inner shaft and an outer tube that are nested together. The horizontal plate 21, the forming inclined plate 22, and the hinge shaft 23 can all be adjusted in the left-right direction to adapt to changes in the size of the model box 1. A protractor 24 is also fixedly installed at the right end of the hinge shaft 23. The angle of the forming inclined plate 22 relative to the horizontal plate 21 can be viewed through the protractor 24, that is, the tilt angle of the forming inclined plate 22 can be viewed. This angle corresponds to the angle of the slope. The angle of the slope can be easily adjusted and controlled by the protractor 24.

[0043] like Figure 1 , 4 As shown in Figure 6, in order to achieve the positioning of the slope forming device relative to the model box 1 and ensure that the forming position and shape of the slope meet the test standards, two parallel sliding grooves 131 are correspondingly arranged on the right side baffle 13 and the sliding baffle 14. Both sliding grooves 131 are horizontally arranged and symmetrical. Adjustable sliders 132 are slidably installed in the two sliding grooves 131 respectively. The adjustable sliders 132 can be T-shaped, and the corresponding sliding grooves 131 are also T-shaped, so that the adjustable sliders 132 installed in the sliding grooves 131 can only slide along the sliding grooves 131 and cannot be disengaged from the sliding grooves 131. Two inclined plate grooves 221 are symmetrically arranged on the left and right sides of the forming inclined plate 22. The inclined plate grooves 221 extend along the side length direction of the forming inclined plate 22. In use, the two adjustable sliders 132 are inserted into the two corresponding inclined plate grooves 221 respectively, so that the adjustable sliders 132 can slide along the inclined plate grooves 221. Since the adjusting slider 132 can slide relative to the slide groove 131 or relative to the inclined plate slide groove 221, when the slope forming pressure plate 2 is used, the tilt angle of the forming inclined plate 22 can be freely adjusted while ensuring that the horizontal pressure plate 21 is in a fixed position.

[0044] like Figure 7As shown, the loading device 3 is a frame structure erected around the model box 1, including four columns 31 and two fixed crossbeams 32. The upper part of the two fixed crossbeams 32 is equipped with a slide rail 33. The two sliding crossbeams 34 slide relative to the slide rail 33 at both ends through sliding parts 341 that slide in conjunction with the guide rail 33. The slide rail 33 has an I-shaped cross-section, making it difficult for the sliding parts 341 to detach from the slide rail 33. Servo jacks 35 are fixed at the lower part of the sliding crossbeams 34 at predetermined positions corresponding to the top of the formed slope. These jacks can be used to apply gravity to the formed slope, simulating scenarios such as soil self-weight or collapse. L-shaped support plates 36 are welded to the lower ends of the sliding beam 34. The support plates 36 extend below the fixed beam 32 and fit against the lower surface of the fixed beam 32. The support plates 36 slide relative to the lower surface of the fixed beam 32 as the sliding beam 34 moves. When the servo jack 35 is loaded, the upward reaction force fed back to the sliding beam 34 can be unloaded onto the fixed beam 32 through the support plates 36. In use, the loading positions of the two servo jacks 35 can be adjusted to correspond to the position of the micropiles for different pile spacings, and the impact of collapses in different orientations on the bearing capacity of the micropiles can be studied. In this embodiment, the height of the column 31 can be set to 2.5m, and the dimensions of the sliding beam 34 are 0.2m × 0.2m × 3m. A steel plate is fixed to the lower end of the output end of the servo jack 35 to increase the contact area with the soil and ensure uniform force distribution.

[0045] like Figure 8 As shown, the rainfall simulation device 4 includes a water pump 41, a water pipe 42, a PVC spray pipe 43, multiple cross-shaped atomizing nozzles 45, pipe clamps, and a sliding pipe clamp seat. The water pump 41 transports water from a storage tank to the PVC spray pipe 43 through the water pipe 42. The other end of the PVC spray pipe 43 is sealed. The PVC spray pipe 43 is fixed to the sliding pipe clamp seat by the pipe clamp. The sliding pipe clamp seat is slidably mounted on a slide rail 33 on the upper part of the fixed crossbeam 32. Multiple water outlets are spaced apart at the lower part of each PVC spray pipe 43, and cross-shaped atomizing nozzles 45 are installed at each water outlet. The pipe clamp can slide relative to the sliding pipe clamp seat, facilitating the assembly and disassembly of the PVC spray pipe 43. During the experiment, a 3D laser scanner 7 is also required to monitor the slope deformation process, and the collected data is used for subsequent analysis.

[0046] The rainfall simulation device 4 can adjust the speed and frequency of the water pump 41 to simulate different types of rainfall processes, thereby studying the performance of micropiles and slope deformation under different rainfall conditions.

[0047] like Figure 9As shown, the earthquake simulation device 5 includes an upper platform 51 and a lower platform 52. The lower platform 52 is placed or fixed on the ground, and the upper platform 51 is supported on the lower platform 52 by multiple evenly distributed springs 53. The model box 1 and the loading device 3 are both fixed on the upper platform 51. The upper platform 51 is also equipped with longitudinal vibrators 54 and transverse vibrators 55 for simulating earthquakes. The controller controls each vibrator to vibrate at a set frequency and amplitude to simulate an earthquake, thereby completing the micropile test under an earthquake scenario.

[0048] like Figure 12 , 13 As shown, the casting fixture 6 has a cylindrical structure with an open top. It has grouting holes 61 on both the circumference and the bottom. A steel pipe 62 is fitted around the outside of the casting fixture 6. The bottom of the steel pipe 62 is fixedly connected to the casting fixture 6 by three steel bars. The steel pipe 62 is used to be pre-embedded in the soil to simulate a pile hole. After the soil is filled, the steel pipe 62 is pulled out. At the same time, non-aqueous reactive polymer grout is poured from the top of the steel pipe 62 into the casting fixture 6 inside the steel pipe 62. The grout slowly flows into the pile hole left after the steel pipe 62 is pulled out. After the grout solidifies quickly, a micropile is formed.

[0049] The following describes the usage process in various scenarios:

[0050] Scenario 1 is a failure bearing test of ordinary micropiles under gravity loading at different pile spacings:

[0051] Step 1: Precast model piles. Using precast reinforced concrete piles, create circular cross-section piles with a diameter of 30mm and a length of 800mm. The concrete grade is determined to be C20, and core reinforcement is used. Strain gauges are attached to the model pile body.

[0052] Step 2: In this example, a model test with twice the pile spacing is conducted. Therefore, the sliding baffle 14 is adjusted to an appropriate position, and then the sliding baffle 14 is fixed relative to the front baffle 11 and the rear baffle 12.

[0053] Step 3: Clean the inside of model box 1 and lay a plastic film on the inner wall of model box 1 to reduce the friction between the soil and the inner wall of model box 1.

[0054] Step 4: Fill a layer of soil into model box 1 and fix the model piles in model box 1 according to the test setting spacing;

[0055] Step 5: Install the slope forming device according to the slope toe angle designed in the experiment. Adjust the size of the slope forming device according to the width of the model box 1. Place the horizontal pressure plate 21 on the soil. With reference to the protractor 24, adjust the angle of the forming inclined plate 22 relative to the horizontal pressure plate 21 to 15 to 45°. Fix the inclined pressure plate with bolts. Bury the soil pressure box at the designed soil position. Fill the soil in layers and compact it.

[0056] Step 6: Adjust the position of the sliding beam 34 and the servo jack 35 in the loading device 3 according to the slope position, so that the pressure head of the servo jack 35 is located directly above the top of the slope, and a steel plate is placed under the pressure head to distribute the force evenly.

[0057] Step 7: Control the servo jack 35 through the servo controller to perform step-by-step loading, and record data such as pile top displacement, pile strain, and soil pressure;

[0058] Step 8: Analyze and process the data.

[0059] Scenario 2 simulates the slope failure process under heavy rainfall:

[0060] Step 1: Precast model piles;

[0061] Step 2: Move the sliding beam 34 in the loading device 3 to both ends, install the PVC spray pipe 43 with nozzle 45 on the pipe clamp, connect one end of the water pump 41 to the water pipe 42 and the other end to the water source, and place the 3D laser scanner 7.

[0062] Step 3: Make a slope model in the model box 1, turn on the water pump 41 switch, change the speed or start frequency of the water pump 41 according to the controller to simulate the rainfall process, start the test, and use the 3D laser scanner 7 to detect the deformation of the slope.

[0063] Scenario 3 simulates the molding of non-aqueous reactive polymer micropiles during emergency landslide rescue:

[0064] Step 1: First, lay a layer of soil in the model box 1 and compact it. Then, fix the steel pipe 62 in the appropriate position in the model box 1. The casting fixture 6 is fixed to the lower part of the steel pipe 62 by welding steel bars to simulate the pile hole in the actual project. Continue to fill and compact the soil.

[0065] Step 2: After backfilling, grouting is performed into the steel pipe 62. The steel pipe 62 is pulled out while grouting. The grout is poured directly onto the casting fixture 6. After being buffered by the casting fixture 6, it slowly flows out into the pile hole left after the steel pipe 62 is pulled out, and waits for it to solidify and form. After the micropile is formed, gravity loading, rainfall loading, seismic loading and other tests can be carried out.

[0066] Scenario 4 illustrates the slope failure process during an earthquake:

[0067] Step 1: Precast micropiles;

[0068] Step 2: Fix the micropiles at the bottom of the model box 1 at the set position, attach strain gauges, pre-embed pressure cells, fill with soil, and place the 3D laser scanner 7.

[0069] Step 3: Prepare the slope model in the model box 1, and use the controller to control the earthquake simulation device 5 to generate longitudinal seismic waves, transverse seismic waves and mixed seismic waves respectively to start the test, and use the 3D laser scanner 7 to detect the deformation of the slope.

[0070] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. The scope of patent protection of the present invention shall be determined by the claims. Similarly, any equivalent structural changes made based on the description and drawings of the present invention shall also be included within the scope of protection of the present invention.

Claims

1. A multi-scenario simulated micropile reinforcement model test device, characterized in that, include: The model box is a rectangular box structure with an opening at the top. It includes front, rear, and right side panels and a bottom plate that are fixedly connected. It also includes a sliding baffle that can slide in the left and right direction. Two guide rails extending in the left and right direction are arranged parallel and symmetrically on the front and rear sides of the bottom plate. The lower sides of the sliding baffle are slidably mounted on the guide rails by sliders. The guide rails are provided with locking structures for locking the sliders relative to the guide rails. The upper sides of the front and rear side panels are respectively provided with a row of bolt holes extending in the left and right direction. The upper part of the sliding baffle can be fixed relative to the front and rear side panels by bolts. The slope forming plate includes a horizontal plate and a forming inclined plate that are hinged to each other by a hinge shaft. The horizontal plate, the forming inclined plate and the hinge shaft can extend and retract in the left and right directions. The loading device includes multiple columns and two fixed crossbeams fixed to the top of the columns. The two fixed crossbeams are symmetrically and parallelly arranged on the front and rear sides above the model box. Slide rails are laid on the two fixed crossbeams respectively. Two sliding crossbeams are erected between the two slide rails. The sliding crossbeams are slidably assembled on the slide rails through sliding parts at both ends so that they can slide freely along the slide rails. Servo jacks are set below the sliding crossbeams for loading the slope after it is formed. The rainfall simulation device includes a water pump, water pipes, sprinkler pipes, and multiple nozzles installed on the sprinkler pipes. The sprinkler pipes are slidably mounted between two slide rails via a sliding pipe clamp that can move along the slide rails. The earthquake simulation device includes upper and lower platforms and multiple springs connected between them. The upper platform is also equipped with longitudinal and transverse exciters for simulating earthquake waves. The model box and loading device are fixed on the upper platform. The casting equipment includes a steel pipe for insertion into the slope soil to simulate a pile hole and a casting pipe fixed inside the lower part of the steel pipe. Multiple grouting holes are provided at the bottom and sides of the casting bucket.

2. The multi-scenario simulated micropile reinforcement model test device according to claim 1, characterized in that, The right-side baffle is made of a transparent material.

3. The multi-scenario simulated micropile reinforcement model test device according to claim 1, characterized in that, The front and rear side baffles have three sets of bolt holes evenly distributed along the left and right directions and arranged vertically. Each set includes two rows of symmetrically arranged bolt holes. The sliding baffle can be selectively connected and fixed to one of the sets of bolt holes by right-angle steel.

4. The multi-scenario simulated micropile reinforcement model test device according to claim 1, characterized in that, The right side baffle and the sliding baffle are symmetrically provided with sliding grooves. The sliding grooves are horizontally arranged, and an adjusting slider is slidably assembled in the sliding groove. The left and right sides of the forming inclined plate are respectively provided with inclined plate sliding grooves, and the outer end of the adjusting slider is slidably engaged with the inclined plate sliding groove.

5. The multi-scenario simulated micropile reinforcement model test device according to claim 1, characterized in that, A protractor is fixed to the right end of the hinge shaft to detect the tilt angle of the shaped inclined plate.

6. The multi-scenario simulated micropile reinforcement model test device according to claim 1, characterized in that, The sliding pipe clamp seat is connected to the spray pipe via a pipe clamp, and the pipe clamp can be rotatably mounted on the sliding pipe clamp seat along a vertical axis.

7. The multi-scenario simulated micropile reinforcement model test device according to claim 1, characterized in that, The lower ends of the sliding crossbeam are respectively provided with L-shaped support plates, which fit against the lower surface of the corresponding fixed crossbeam.

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