A test device and method for indoor simulation of soft soil roadbed settlement and bearing capacity

Abstract

The present invention belongs to the technical field of soft soil roadbed settlement detection, and in particular, is an indoor test device and method for simulating soft soil roadbed settlement and bearing capacity. When checking the settlement of soft soil roadbed by dropping sand and gravel, it is impossible to accurately control the weight of sand and gravel. The following scheme is proposed, including: a detection base, the top of which is fixedly connected to a settlement frame; a chute vertical plate, slidably connected to one side of the detection base; a plurality of bottom nails, all fixedly connected to the bottom end of the detection base; a scale plate, provided on one side of the chute vertical plate, with a pointer provided at the front end of the scale plate; and a sand and gravel quantitative opening and closing assembly. The present invention discloses an indoor test device and method for simulating soft soil roadbed settlement and bearing capacity, which has the function of quantitative sand dropping and can strictly control the load applied to the soft soil roadbed, so that the weight of sand and gravel in the settlement frame is consistent during each detection, avoiding deviations in roadbed settlement and bearing capacity detection data due to load fluctuations, and providing stable conditions for accurately evaluating roadbed performance.

Description

Technical Field

[0001] The present invention relates to the technical field of soft soil roadbed settlement detection, and in particular to an indoor test device and method for simulating soft soil roadbed settlement and bearing capacity. Background Art

[0002] The settlement of the roadbed is reflected by monitoring the settlement changes of the benchmark piles. When the roadbed settles, the benchmark piles will drop accordingly. The changes in the readings of the scale and indicator rod can intuitively reflect the settlement of the roadbed. It is suitable for settlement monitoring of various soft soil roadbeds, especially after the pavement construction is completed, the settlement of the roadbed can be continuously observed.

[0003] When the existing equipment is used to check the settlement of soft soil roadbed, the gravel placement method is used. However, due to the lack of precise control measures, the amount of gravel placed varies arbitrarily. The weight of gravel in the settlement frame varies greatly during each test, and the loading load is unstable. This causes frequent deviations in the roadbed settlement and bearing capacity test data, greatly reducing the reliability of the results. It is also difficult to effectively compare data from different tests. Summary of the Invention

[0004] The present invention discloses an indoor test device and method for simulating the settlement and bearing capacity of soft soil roadbed, aiming to solve the technical problem in the background technology that when checking the settlement of soft soil roadbed by dropping sand and gravel, the weight of sand and gravel cannot be accurately controlled, resulting in data deviation and reduced reliability and comparability of the results.

[0005] The present invention proposes an indoor test device for simulating the settlement and bearing capacity of soft soil roadbed, comprising:

[0006] Detection base, the top of the detection base is fixedly connected with a settlement frame;

[0007] A chute riser is slidably connected to one side of the detection base;

[0008] A plurality of bottom nails are fixedly connected to the bottom end of the detection base;

[0009] A scale plate is provided on one side of the vertical plate of the chute, and a pointer is provided at the front end of the scale plate;

[0010] A sand and gravel quantitative opening and closing assembly is provided above the settlement frame and is used to quantitatively transport sand and gravel into the settlement frame for detecting the settlement and bearing capacity of the roadbed;

[0011] The uniform force gravel paving assembly is arranged inside the settlement frame. The uniform force gravel paving assembly is used to evenly pave the sand and gravel transported to the settlement frame so that the force exerted on the settlement frame is uniform.

[0012] In a preferred embodiment, the sand and gravel quantitative opening and closing assembly includes:

[0013] The gravel frame is arranged above the settlement frame, and both sides of the interior of the gravel frame are fixedly connected with oblique slopes;

[0014] The filter plate is arranged inside the sand and gravel frame. A circular hole is opened at the bottom of the sedimentation frame, and the outer side of the filter plate is fixedly connected to the inner side of the circular hole.

[0015] Two fixed ring frames are fixedly connected to both sides of the sand and gravel frame, the interior of the fixed ring frame is fixedly connected to a suction pump, and the suction end of the suction pump is fixedly connected to an upper pipe;

[0016] The expansion port is fixedly connected to the bottom end of the circular hole of the sand and gravel frame.

[0017] In a preferred embodiment, the sand and gravel quantitative opening and closing assembly further comprises:

[0018] A connecting plate, fixedly connected to the top of the sand and gravel frame;

[0019] Two telescopic tubes are fixedly connected to the bottom end of the upper tube;

[0020] The two lower pipes are fixedly connected to the bottom end of the telescopic pipe, and the ends of the lower pipes away from the telescopic pipes are fixedly connected to both sides of the settlement frame, and the interior of the settlement frame is connected to the lower pipes;

[0021] Two opening and closing plates, two rectangular holes are opened inside the bottom end of the sand and gravel frame, the rectangular holes are located on both sides of the circular hole, the opening and closing plates are located inside the rectangular holes and are slidably connected, and the opening and closing plates are used to seal the circular hole.

[0022] In a preferred solution, the two opening and closing plates are fixedly connected to a movable plate on the opposite sides thereof, two slide grooves are provided at the bottom end of the sand and gravel frame, the slide grooves are both located below the rectangular hole, the movable plates are slidably connected to the slide grooves, the opposite sides of the movable plates are fixedly connected to an electric telescopic rod, the bottom ends of the electric telescopic rods are fixedly connected to the bottom end of the sand and gravel frame, and the opposite sides of the movable plates are fixedly connected to two extension rods and two return springs, the return springs are both located on the outside of the extension rods, and the return springs and the end of the extension rod away from the movable plate are fixedly connected to one side of the inside of the slide groove.

[0023] In a preferred embodiment, the uniform gravel paving assembly includes:

[0024] A lifting plate is arranged inside the settlement frame, and the bottom end of the lifting plate is fixedly connected to a plurality of spring rods, and the bottom ends of the spring rods are all fixedly connected to the bottom end of the settlement frame;

[0025] Multiple chute tracks are fixedly connected to both sides of the inner wall of the settlement frame;

[0026] Two paving rollers are both arranged above the lifting plate.

[0027] In a preferred embodiment, the uniform gravel paving assembly further comprises:

[0028] The two motor frames are fixedly connected to the opposite side of the chute track away from the chute vertical plate, and the inside of the motor frames is fixedly connected to the drive motor. The power output shaft of the drive motor is connected to the rotating threaded rod through a coupling, and the end of the rotating threaded rod away from the drive motor is connected to the inside of the chute track through a thread.

[0029] Two sliding plate frames are both slidably connected to the inside of the slide groove track, and one end of the sliding plate frame close to the drive motor is internally slidably connected to the outside of the rotating threaded rod;

[0030] The two moving frames are both located below the sliding plate frame, and the paving rollers are both located inside the moving frames.

[0031] The top ends of the extension rods and the compression springs are fixedly connected to the bottom ends of the sliding plate frames, and the sliding plate frames are connected in an internal sliding manner to the guide rails at the end thereof away from the driving motor.

[0032] In a preferred solution, the top of the slide vertical plate is fixedly connected to the top plate, the side opposite to the front end of the top plate is fixedly connected to the top frame plate, the bottom end of the top frame plate is fixedly connected to multiple fixing ropes, the bottom ends of the fixing ropes are all fixedly connected to the top of the connecting plate, and the side of the slide vertical plate close to the scale plate is fixedly connected to the fixing rod, the bottom end of the fixing rod is fixedly connected to the connecting frame, the inner side of the connecting frame is fixedly connected to one side of the scale plate, one end of the pointer is fixedly connected to the connecting rod, the bottom end of the connecting rod is fixedly connected to the side of the settlement frame close to the slide vertical plate, and the side of the detection base close to the slide vertical plate is fixedly connected to the sliding frame, and the slide vertical plate is located in the internal sliding connection of the sliding frame.

[0033] A method for using an indoor test device for simulating soft soil roadbed settlement and bearing capacity, using the above-mentioned indoor test device for simulating soft soil roadbed settlement and bearing capacity, includes the following steps:

[0034] Step 1: When the sand and gravel are quantitatively transported, the electric telescopic rod contracts, driving the opening and closing plate to move, opening the circular hole at the bottom of the sand and gravel frame, and the sand and gravel fall into the settlement frame through the circular hole and the expansion port. At the same time, the oblique slope inside the sand and gravel frame is used to guide the flow of sand and gravel, realizing quantitative transportation of sand and gravel into the settlement frame;

[0035] Step 2: Evenly spread the sand and gravel, start the driving motor to drive the rotating threaded rod to rotate, so that the sliding plate frame slides along the slide track, and the telescopic driving rod shrinks as the height of the sand and gravel is increased, so that the paving roller can adapt to the height of the sand and gravel. During the movement of the sliding plate frame, the paving roller rolls the sand and gravel in the settlement frame to evenly spread it, so that the settlement frame is evenly stressed.

[0036] Step 3: Due to the gravity of the internal sand and gravel, the settlement frame sinks on the soft soil roadbed, and the relative position of the vertical plate of the chute changes. The pointer is driven by the fixed rod to move on the scale plate, and the pointer displays the settlement scale to detect the roadbed settlement.

[0037] From the above, it can be seen that the indoor test device for simulating soft soil roadbed settlement and bearing capacity provided by the present invention has quantitative sand falling and can strictly control the load applied to the soft soil roadbed, so that the weight of sand and gravel in the settlement frame is consistent during each test, avoiding the deviation of roadbed settlement and bearing capacity test data due to load fluctuations, and providing stable conditions for accurately evaluating roadbed performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 This is a schematic diagram of the overall structure of an indoor test device for simulating soft soil roadbed settlement and bearing capacity proposed by the present invention;

[0039] Figure 2 This is a schematic diagram of the bottom structure of the testing platform of an indoor test device for simulating soft soil roadbed settlement and bearing capacity proposed by the present invention;

[0040] Figure 3 This is a schematic diagram of the structure above the test platform of an indoor test device for simulating soft soil roadbed settlement and bearing capacity proposed by the present invention;

[0041] Figure 4 This is a schematic diagram of the structure of the scale plate portion of an indoor test device for simulating soft soil roadbed settlement and bearing capacity proposed by the present invention;

[0042] Figure 5 This is a schematic diagram of the structure of the sand and gravel quantitative opening and closing components of an indoor test device for simulating soft soil roadbed settlement and bearing capacity proposed by the present invention;

[0043] Figure 6 This is a schematic diagram of the partial structure of the sand and gravel quantitative opening and closing components of an indoor test device for simulating soft soil roadbed settlement and bearing capacity proposed by the present invention;

[0044] Figure 7 This is a schematic diagram of the uniform force gravel paving component structure of an indoor test device for simulating soft soil roadbed settlement and bearing capacity proposed by the present invention;

[0045] Figure 8This is a partial structural diagram of the uniform-force gravel paving assembly of an indoor test device for simulating soft soil roadbed settlement and bearing capacity proposed by the present invention.

[0046] Figure: 1, detection base; 2, settlement frame; 3, chute vertical plate; 4, top plate; 5, top frame plate; 6, fixing rope; 7, bottom nail; 8, sliding frame; 9, uniform force gravel paving assembly; 901, lifting plate; 902, spring rod; 903, chute track; 904, motor frame; 905, drive motor; 906, paving roller; 907, guide rod; 908, rotating threaded rod; 909, sliding plate frame; 910, telescopic drive rod; 911, extension movable rod; 912, compression spring; 913, moving frame; 914, mounting rod ; 10. Connecting frame; 11. Scale plate; 12. Pointer; 13. Fixed rod; 14. Sand and gravel quantitative opening and closing assembly; 1401. Connecting plate; 1402. Sand and gravel frame; 1403. Fixed ring frame; 1404. Suction pump; 1405. Upper pipe; 1406. Telescopic pipe; 1407. Filter plate; 1408. Lower pipe; 1409. Oblique slope; 1410. Diffuser; 1411. Opening and closing plate; 1412. Movable plate; 1413. Electric telescopic rod; 1414. Extension rod; 1415. Reset spring; 15. Connecting rod. DETAILED DESCRIPTION

[0047] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0048] The present invention discloses an indoor test device for simulating soft soil roadbed settlement and bearing capacity, which is mainly used in scenarios where the weight of sand and gravel cannot be accurately controlled during soft soil roadbed settlement inspection by dropping sand and gravel, resulting in data deviation and reduced reliability and comparability of the results.

[0049] Reference Figure 1-8 , an indoor test device for simulating soft soil roadbed settlement and bearing capacity, comprising:

[0050] Detection base 1, the top of which is fixedly connected with a settlement frame 2;

[0051] The chute riser 3 is slidably connected to one side of the detection base 1;

[0052] A plurality of bottom nails 7 are fixedly connected to the bottom end of the detection base 1;

[0053] A scale plate 11 is provided on one side of the chute vertical plate 3, and a pointer 12 is provided at the front end of the scale plate 11;

[0054] The sand and gravel quantitative opening and closing assembly 14 is arranged above the settlement frame 2. The sand and gravel quantitative opening and closing assembly 14 is used to quantitatively transport sand and gravel into the settlement frame 2 to detect the settlement and bearing capacity of the roadbed;

[0055] The uniform force gravel paving assembly 9 is arranged inside the settlement frame 2. The uniform force gravel paving assembly 9 is used to evenly pave the sand and gravel transported to the settlement frame 2 so that the force applied to the settlement frame 2 is uniform.

[0056] Reference Figure 1 、 Figure 2 、 Figure 3 、 Figure 5 and Figure 6 The sand and gravel quantitative opening and closing component 14 includes:

[0057] The gravel frame 1402 is arranged above the settlement frame 2, and both sides of the interior of the gravel frame 1402 are fixedly connected with oblique slopes 1409;

[0058] The filter plate 1407 is arranged inside the sand and gravel frame 1402. A circular hole is opened at the bottom of the sedimentation frame 2, and the outer side of the filter plate 1407 is fixedly connected to the inside of the circular hole;

[0059] Two fixed ring frames 1403 are fixedly connected to both sides of the sand and gravel frame 1402. A suction pump 1404 is fixedly connected inside the fixed ring frame 1403. The suction end of the suction pump 1404 is fixedly connected to an upper pipe 1405.

[0060] The expansion port 1410 is fixedly connected to the bottom end of the circular hole of the sand and gravel frame 1402.

[0061] In the present invention, the sand and gravel quantitative opening and closing component 14 also includes:

[0062] The connecting plate 1401 is fixedly connected to the top of the sand and gravel frame 1402;

[0063] Two telescopic tubes 1406 are fixedly connected to the bottom end of the upper tube 1405;

[0064] Two lower tubes 1408 are fixedly connected to the bottom end of the telescopic tube 1406. The ends of the lower tubes 1408 away from the telescopic tube 1406 are fixedly connected to both sides of the settlement frame 2. The interior of the settlement frame 2 is connected to the lower tubes 1408.

[0065] Two opening and closing plates 1411, two rectangular holes are opened inside the bottom of the sand and gravel frame 1402, and the rectangular holes are located on both sides of the circular hole. The opening and closing plates 1411 are located inside the rectangular holes and are slidably connected. The opening and closing plates 1411 are used to seal the circular hole.

[0066] In the present invention, the two opening and closing plates 1411 are fixedly connected to a movable plate 1412 on the opposite sides thereof, and two slide grooves are provided at the bottom end of the sand and gravel frame 1402, and the slide grooves are both located below the rectangular hole. The movable plates 1412 are slidably connected to the slide grooves, and the opposite sides of the movable plates 1412 are fixedly connected to an electric telescopic rod 1413, and the bottom ends of the electric telescopic rod 1413 are fixedly connected to the bottom end of the sand and gravel frame 1402, and the opposite sides of the movable plates 1412 are fixedly connected to two extension rods 1414 and two return springs 1415, and the return springs 1415 are both located on the outside of the extension rod 1414, and the end of the return spring 1415 and the extension rod 1414 away from the movable plate 1412 are fixedly connected to one side inside the slide groove.

[0067] Specifically, before the settlement monitoring is carried out, the opening and closing plate 1411 is in a state of sealing the circular hole at the bottom end of the sand and gravel frame 1402, the return spring 1415 remains in a natural state, the suction pump 1404 is not started, and the sand and gravel are stored in the sand and gravel frame 1402. Due to the guidance of the oblique slope 1409, they converge to the filter plate 1407 above the circular hole. When monitoring is carried out, the electric telescopic rod 1413 contracts, pulling the movable plate 1412 to slide along the slide groove, driving the opening and closing plate 1411 to move to both sides of the rectangular hole, opening the circular hole, and the sand and gravel are affected by gravity, filtered by the filter plate 1407 and the expansion port 1410, and quantitatively fall into the settlement frame 2 below. In this process, the extension rod 1414 moves along with the movable plate 1412 moves, and the return spring 1415 is stretched to store energy. When it is closed after quantitative sand falling out, the electric telescopic rod 1413 extends, and the return spring 1415 releases elastic potential energy, pushing the opening and closing plate 1411 to move back, re-seal the circular hole, and complete a quantitative sand falling out. When the monitoring is completed and the sand and gravel need to be recovered, the suction pump 1404 is started, and its suction end is used to generate negative pressure; at this time, under the action of negative pressure, it is sucked to the upper tube 1405 through the lower tube 1408 and the telescopic tube 1406, and then transported to the sand and gravel frame 1402 through the suction pump 1404. The telescopic tube 1406 can adapt to the relative position changes of the sand and gravel frame 1402 and the sedimentation frame 2 to ensure the stability of the suction process.

[0068] In specific application scenarios, quantitative sand removal can strictly control the load applied to the soft soil roadbed, so that the weight of sand and gravel in the settlement frame 2 is consistent during each test, avoiding roadbed settlement and bearing capacity test data deviation due to load fluctuations, and providing stable and reproducible loading conditions for accurate evaluation of roadbed performance. The sand and gravel withdrawal process is stable, and the settlement frame 2 can be emptied to ensure that the initial conditions of the next test are consistent, thereby improving the reliability and comparability of the test results.

[0069] It should be noted that when quantitative sand is dropped, the opening and closing plate 1411, the electric telescopic rod 1413 and other components work together, and the movements are precise and controllable, which reduces the risk of interference and damage to other components of the equipment (such as uniform paving components, chute structures, etc.) caused by sand and gravel spillage and accumulation, and reduces the workload of equipment cleaning and maintenance caused by sand and gravel overflow.

[0070] Reference Figure 1 、 Figure 7 and Figure 8 The uniform gravel paving assembly 9 includes:

[0071] The lifting plate 901 is arranged inside the settlement frame 2. The bottom end of the lifting plate 901 is fixedly connected to a plurality of spring rods 902. The bottom ends of the spring rods 902 are all fixedly connected to the bottom end of the settlement frame 2.

[0072] Multiple chute rails 903 are fixedly connected to both sides of the inner wall of the settlement frame 2;

[0073] The two paving rollers 906 are both disposed above the lifting plate 901 .

[0074] In the present invention, the uniform gravel paving assembly 9 further includes:

[0075] The two motor frames 904 are fixedly connected to the opposite side of the chute track 903 away from the chute riser 3. The inside of the motor frames 904 is fixedly connected to the drive motor 905. The power output shaft of the drive motor 905 is connected to the rotating threaded rod 908 through a coupling. The end of the rotating threaded rod 908 away from the drive motor 905 is connected to the inside of the chute track 903 through a thread.

[0076] Two sliding plate frames 909 are both slidably connected to the inside of the slide track 903, and one end of the sliding plate frame 909 close to the drive motor 905 is internally slidably connected to the outside of the rotating threaded rod 908;

[0077] The two moving frames 913 are both located below the sliding plate frame 909, and the paving rollers 906 are both located inside the moving frames.

[0078] In the present invention, the interiors of the two paving rollers 906 are movably connected with mounting rods 914, both ends of the mounting rods 914 are fixedly connected to the interior of the moving frame 913, the bottom end of the moving frame 913 is fixedly connected to two telescopic drive rods 910, the top ends of the telescopic drive rods 910 are fixedly connected to the top of the sliding plate frame 909, the bottom end of the moving frame 913 is fixedly connected to a plurality of extended movable rods 911, and the bottom end of the moving frame 913 is fixedly connected to a plurality of compression springs 912, the compression springs 912 are located on the outside of the extended movable rods 911, the top ends of the extended movable rods 911 and the compression springs 912 are fixedly connected to the bottom end of the sliding plate frame 909, the sliding plate frame 909 is slidably connected to the guide rod 907 at one end away from the driving motor 905, and both ends of the guide rod 907 are fixedly connected to the inside of the slide track 903 near the slide vertical plate 3.

[0079] Specifically, the lifting plate 901 is supported by multiple spring rods 902 at the bottom and is in the initial position inside the settlement frame 2. When sand and gravel paving operations are required, the driving motor 905 in the motor frame 904 is started, driving the rotating threaded rod 908 to rotate. Since the rotating threaded rod 908 is threadedly connected to the inside of the slide track 903 at one end away from the driving motor 905, and the sliding plate frame 909 is close to the driving motor 905 and is slidably connected to the outside of the rotating threaded rod 908 at the same time, the sliding plate frame 909 is slidably connected to the guide rod 907 at one end away from the driving motor 905 (the guide rod 907 plays an auxiliary guiding role and ensures the movement stability of the sliding plate frame 909). Under the rotation of the rotating threaded rod 908, the sliding plate frame 909 performs a linear sliding motion along the slide track 903. When the sliding plate frame 909 drives the moving frame 913 and During the movement of the paving roller 906, the paving roller 906 contacts the sand and gravel in the settlement frame 2. When the thickness of the sand and gravel changes, the reaction force generated by the sand and gravel on the paving roller 906 will cause the moving frame 913 to produce an up and down displacement adjustment relative to the sliding plate frame 909 through the telescopic drive rod 910; at the same time, the extended movable rod 911 moves with the moving frame 913, and the compression spring 912 will compress or stretch accordingly according to the change in the height of the sand and gravel, and use its own elasticity to assist the paving roller 906 to adapt to the surface morphology of the sand and gravel. Through such adaptive adjustment, the paving roller 906 continues to exert a uniform force on the sand and gravel when rolling over the sand and gravel surface, gradually flattening and spreading the accumulated sand and gravel, ensuring that the sand and gravel in the settlement frame 2 are evenly distributed, so that the force on the settlement frame 2 tends to be uniform, providing a stable and uniform loading basis for subsequent roadbed settlement and bearing capacity detection.

[0080] In specific application scenarios, through the adaptive adjustment of the paving roller 906, the sand and gravel can be accurately and evenly spread, so that the settlement frame 2 is evenly stressed, avoiding abnormal local pressure due to uneven accumulation of sand and gravel, and allowing the roadbed settlement and bearing capacity test data to more truly reflect the roadbed performance, thereby improving the reliability of the test results.

[0081] It should be noted that after the sand and gravel are evenly paved, the settlement frame 2 is evenly stressed. When transferring the load downward, it can act more stably on the soft soil roadbed, reducing the additional deformation interference caused by uneven stress, allowing the roadbed settlement data collection to focus more on the performance of the roadbed itself, and assisting in accurately judging the roadbed quality.

[0082] Reference Figure 1-Figure 4In a preferred embodiment, the top of the slide vertical plate 3 is fixedly connected to the top plate 4, and the side opposite to the front end of the top plate 4 is fixedly connected to the top frame plate 5, and the bottom end of the top frame plate 5 is fixedly connected to a plurality of fixing ropes 6, and the bottom ends of the fixing ropes 6 are all fixedly connected to the top of the connecting plate 1401, and the side of the slide vertical plate 3 close to the scale plate 11 is fixedly connected to the fixing rod 13, and the bottom end of the fixing rod 13 is fixedly connected to the connecting frame 10, and the inner side of the connecting frame 10 is fixedly connected to one side of the scale plate 11, and one end of the pointer 12 is fixedly connected to the connecting rod 15, and the bottom end of the connecting rod 15 is fixedly connected to the side of the settlement frame 2 close to the slide vertical plate 3, and the side of the detection base 1 close to the slide vertical plate 3 is fixedly connected to the sliding frame 8, and the slide vertical plate 3 is located in the internal sliding connection of the sliding frame 8.

[0083] A method for using an indoor test device for simulating soft soil roadbed settlement and bearing capacity, using the above-mentioned indoor test device for simulating soft soil roadbed settlement and bearing capacity, includes the following steps:

[0084] Step 1: When sand and gravel are quantitatively transported, the electric telescopic rod 1413 contracts, driving the opening and closing plate 1411 to move, opening the circular hole at the bottom of the sand and gravel frame 1402, and the sand and gravel fall into the settlement frame 2 through the circular hole and the expansion port 1410. At the same time, the inclined slope 1409 in the sand and gravel frame 1402 is used to guide the flow of sand and gravel, thereby achieving quantitative transportation of sand and gravel into the settlement frame 2;

[0085] Step 2: To evenly level the sand and gravel, the drive motor 905 is started, driving the rotating threaded rod 908 to rotate, causing the sliding plate frame 909 to slide along the slide track 903. The telescopic drive rod 910 contracts as the height of the sand and gravel increases, allowing the leveling roller 906 to adapt to the height of the sand and gravel. During the movement of the sliding plate frame 909, the leveling roller 906 rolls the sand and gravel in the settlement frame 2, leveling it evenly and making the settlement frame 2 evenly stressed.

[0086] Step 3: Due to the gravity of the internal sand and gravel, the settlement frame 2 sinks on the soft soil roadbed, and the relative position of the chute vertical plate 3 changes. The fixed rod 13 drives the pointer 12 to move on the scale plate 11. The pointer 12 displays the settlement scale to detect the roadbed settlement.

[0087] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. An indoor test device for simulating the settlement and bearing capacity of soft soil roadbed, characterized in that: include: A detection base (1), the top of which is fixedly connected to a settlement frame (2); A chute riser (3) is slidably connected to one side of the detection base (1); A plurality of bottom nails (7) are fixedly connected to the bottom end of the detection base (1); A scale plate (11) is provided on one side of the chute vertical plate (3), and a pointer (12) is provided at the front end of the scale plate (11); A sand and gravel quantitative opening and closing assembly (14) is arranged above the settlement frame (2), and the sand and gravel quantitative opening and closing assembly (14) is used to quantitatively transport sand and gravel into the settlement frame (2) for detecting the settlement and bearing capacity of the roadbed; A uniform force gravel paving assembly (9) is arranged inside the settlement frame (2), and the uniform force gravel paving assembly (9) is used to evenly pave the gravel transported to the settlement frame (2) so that the force applied to the settlement frame (2) is uniform; The sand and gravel quantitative opening and closing component (14) comprises: A gravel frame (1402) is arranged above the settlement frame (2), and both sides of the interior of the gravel frame (1402) are fixedly connected with an oblique slope (1409); The filter plate (1407) is arranged inside the sand and gravel frame (1402). A circular hole is opened at the bottom end of the sand and gravel frame (1402). The outer side of the filter plate (1407) is fixedly connected to the inside of the circular hole. Two fixed ring frames (1403) are fixedly connected to both sides of the sand and gravel frame (1402); a suction pump (1404) is fixedly connected inside the fixed ring frame (1403); and an upper pipe (1405) is fixedly connected to the suction end of the suction pump (1404); The expansion port (1410) is fixedly connected to the bottom end of the circular hole of the sandstone frame (1402); The sand and gravel quantitative opening and closing component (14) also includes: A connecting plate (1401) is fixedly connected to the top of the sand and gravel frame (1402); Two telescopic tubes (1406) are fixedly connected to the bottom end of the upper tube (1405); The two lower tubes (1408) are fixedly connected to the bottom end of the telescopic tube (1406), and the ends of the lower tubes (1408) away from the telescopic tube (1406) are fixedly connected to both sides of the sedimentation frame (2), and the interior of the sedimentation frame (2) is connected to the lower tubes (1408); Two opening and closing plates (1411), two rectangular holes are opened inside the bottom of the sandstone frame (1402), the rectangular holes are located on both sides of the circular hole, and the opening and closing plates (1411) are located inside the rectangular holes and are slidably connected, and the opening and closing plates (1411) are used to seal the circular holes; The two opening and closing plates (1411) are fixedly connected to a movable plate (1412) on opposite sides thereof. Two chutes are provided at the bottom end of the sand and gravel frame (1402). The chutes are both located below the rectangular hole. The movable plates (1412) are slidably connected to the chutes. The opposite sides of the movable plates (1412) are fixedly connected to an electric telescopic rod (1413). The bottom ends of the electric telescopic rods (1413) are fixedly connected to the bottom end of the sand and gravel frame (1402). The opposite sides of the movable plates (1412) are fixedly connected to two extension rods (1414) and two return springs (1415). The return springs (1415) are both located outside the extension rods (1414). The ends of the return springs (1415) and the extension rods (1414) away from the movable plates (1412) are fixedly connected to one side inside the chutes.

2. The indoor test device for simulating soft soil roadbed settlement and bearing capacity according to claim 1, characterized in that: The uniform gravel paving assembly (9) comprises: A lifting plate (901) is arranged inside the settlement frame (2), and the bottom end of the lifting plate (901) is fixedly connected to a plurality of spring rods (902), and the bottom ends of the spring rods (902) are all fixedly connected to the bottom end of the settlement frame (2); A plurality of chute rails (903) are fixedly connected to both sides of the inner wall of the sedimentation frame (2); The two paving rollers (906) are both arranged above the lifting plate (901).

3. The indoor test device for simulating soft soil roadbed settlement and bearing capacity according to claim 2, characterized in that: The uniform gravel paving assembly (9) further comprises: Two motor frames (904) are fixedly connected to opposite sides of the chute track (903) away from the chute vertical plate (3); the motor frames (904) are fixedly connected to the insides of the motor frames (904); the power output shafts of the drive motors (905) are connected to rotating threaded rods (908) via couplings; and the ends of the rotating threaded rods (908) away from the drive motors (905) are connected to the insides of the chute track (903) via threads; Two sliding plate frames (909) are both slidably connected to the inside of the slide track (903), and one end of the sliding plate frame (909) close to the drive motor (905) is internally slidably connected to the outside of the rotating threaded rod (908); The two moving frames (913) are both located below the sliding plate frame (909), and the paving rollers (906) are both located inside the moving frames (913).

4. The indoor test device for simulating soft soil roadbed settlement and bearing capacity according to claim 3, characterized in that: The interiors of the two paving rollers (906) are movably connected to mounting rods (914), both ends of the mounting rods (914) are fixedly connected to the interior of the moving frame (913), the bottom ends of the moving frame (913) are fixedly connected to two telescopic drive rods (910), the top ends of the telescopic drive rods (910) are fixedly connected to the top ends of the sliding plate frames (909), the bottom ends of the moving frames (913) are fixedly connected to a plurality of extending movable rods (911), and the bottom ends of the moving frames (913) are fixedly connected to the top ends of the sliding plate frames (909). The ends of the sliding plate frame (909) are fixedly connected to a plurality of compression springs (912), and the compression springs (912) are all located on the outside of the extended movable rod (911). The top ends of the extended movable rod (911) and the compression springs (912) are fixedly connected to the bottom end of the sliding plate frame (909). The end of the sliding plate frame (909) away from the driving motor (905) is internally slidably connected to the guide rod (907), and both ends of the guide rod (907) are fixedly connected to the inside of the slide track (903) near the slide vertical plate (3).

5. The indoor test device for simulating soft soil roadbed settlement and bearing capacity according to claim 4, characterized in that: The top end of the chute vertical plate (3) is fixedly connected to the top plate (4), the side opposite to the front end of the top plate (4) is fixedly connected to the top frame plate (5), the bottom end of the top frame plate (5) is fixedly connected to a plurality of fixing ropes (6), the bottom ends of the fixing ropes (6) are all fixedly connected to the top end of the connecting plate (1401), and the side of the chute vertical plate (3) close to the scale plate (11) is fixedly connected to a fixing rod (13), the bottom end of the fixing rod (13) is fixedly connected to the connecting frame (10), and the inner side of the connecting frame (10) is fixedly connected to one side of the scale plate (11).

6. The indoor test device for simulating soft soil roadbed settlement and bearing capacity according to claim 5, characterized in that: One end of the pointer (12) is fixedly connected to a connecting rod (15), the bottom end of the connecting rod (15) is fixedly connected to a side of the settlement frame (2) close to the chute vertical plate (3), and the side of the detection base (1) close to the chute vertical plate (3) is fixedly connected to a sliding frame (8), and the chute vertical plate (3) is located inside the sliding frame (8) for sliding connection.

7. A method for using an indoor test device for simulating soft soil roadbed settlement and bearing capacity, using the indoor test device for simulating soft soil roadbed settlement and bearing capacity according to claim 6, characterized in that: The steps include: Step 1: When the sand and gravel are quantitatively transported, the electric telescopic rod (1413) contracts, driving the opening and closing plate (1411) to move, opening the circular hole at the bottom end of the sand and gravel frame (1402), and the sand and gravel fall into the sedimentation frame (2) through the circular hole and the expansion port (1410). At the same time, the inclined slope (1409) inside the sand and gravel frame (1402) is used to guide the flow of the sand and gravel, thereby achieving quantitative transport of the sand and gravel into the sedimentation frame (2); Step 2: When the sand and gravel are evenly laid flat, the driving motor (905) is started, driving the rotating threaded rod (908) to rotate, causing the sliding plate frame (909) to slide along the slide track (903), and the telescopic driving rod (910) contracts as the height of the sand and gravel is increased, allowing the flattening roller (906) to adapt to the height of the sand and gravel. During the movement of the sliding plate frame (909), the flattening roller (906) rolls the sand and gravel in the settlement frame (2) to evenly lay it flat, so that the settlement frame (2) is evenly stressed. Step 3: The settlement frame (2) sinks on the soft soil roadbed due to the gravity of the internal sand and gravel, and the relative position of the chute vertical plate (3) changes. The pointer (12) is driven to move on the scale plate (11) through the fixed rod (13). The pointer (12) displays the settlement scale, thereby detecting the roadbed settlement.

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