Loess reinforced retaining wall model test device

Abstract

The utility model discloses a loess reinforced retaining wall model test device, which relates to the technical field of retaining wall test devices and comprises a model test box, a wall panel is movably connected to one side of the model test box, a top plate is connected to the inner side of the top end of the model test box, and filler is filled in the model test box. Different numbers of balancing weights can be selected on the adjusting vertical rod according to needs, so that the bearing vehicle body has different gravity load conditions, the sliding wheels can be driven to rotate through the driving motor, and the bearing vehicle body is driven to integrally reciprocate along the top plate. Different positions, different speeds and different pressure conditions are simulated under the action of a plurality of groups of top loading mechanisms at different positions, vehicle dynamic cyclic loads under different conditions are generated, and the transverse pressure or vertical pressure change condition in the model test box is detected in real time in cooperation with the action of a vertical pressure box and a transverse pressure box; and the accuracy of test results is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of retaining wall test devices, in particular to a loess reinforced retaining wall model test device. Background Art

[0002] Reinforced soil is a composite structure, in which flexible reinforcement materials are buried in the filler to improve the mechanical properties of the soil. Reinforced soil retaining wall consists of three parts: fill, reinforcement or reinforcement mesh arranged in the fill, and wall panel. The panel is tightened by the friction between the soil and the reinforcement to resist the passive earth pressure of the fill. The indoor test device of retaining wall is used to simulate the change of earth pressure in actual engineering, which has been widely used in the engineering field.

[0003] After searching, Chinese patent publication number CN105113555A discloses a reinforced earth retaining wall model test device and method, including a model box, a retaining wall panel, filler, a vertical load loading system and a test system; the filler is filled in the model box, the retaining wall panel is arranged in front of the model box; the vertical load loading system is arranged above the model box to apply vertical pressure to the model. By adjusting the load size on the top of the model, the reinforced earth retaining wall model under different fill load levels can be simulated.

[0004] During use, the above-mentioned test device only considers the static load of soil pressure, while the loads on the retaining wall during use are mainly dynamic loads generated by the movement cycle of vehicles. Dynamic loads play a key role in affecting the durability, stability and safe operation of the retaining wall. If only relevant tests on static loads are carried out, the entire test result will be relatively simple and have a certain one-sidedness, resulting in inaccurate test results. In addition, the instability cases all show that when the retaining wall is subjected to the combined effects of rainfall and traffic loads on the top of the wall, the dynamic load of traffic will aggravate the infiltration of rainwater at the top of the wall, and will cause the excess pore water pressure in the saturated area of ​​the reinforced body to increase, increasing the probability of damage to the retaining wall, so the change process of the pore water pressure should also be paid attention to. The present application proposes a loess reinforced retaining wall model test device to solve the above problems. Summary of the invention

[0005] The utility model provides a loess reinforced retaining wall model test device to solve the problems raised in the above background technology.

[0006] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0007] A loess reinforced retaining wall model test device comprises a model test box, one side of the model test box is movably connected with a wall panel, the inner side of the top of the model test box is connected with a top plate, the interior of the model test box is filled with filler, a plurality of groups of reinforcement layers are laid inside the model test box, the reinforcement layers are alternately filled with filler, a plurality of vertical pressure boxes and transverse pressure boxes are installed inside the model test box, and a plurality of top loading mechanisms are installed on the top plate.

[0008] A further improvement of the technical solution of the utility model is that the top loading mechanism includes a plurality of slide rails installed on the upper surface of the top plate, a load-bearing body is movably connected to the outer surface of the slide rails, an adjusting vertical rod is installed on the upper surface of the load-bearing body, a counterweight block is movably connected to the outer surface of the adjusting vertical rod, a fixing nut is threadedly connected to the outer surface of the adjusting vertical rod, and drive components are installed on both sides of the load-bearing body.

[0009] A further improvement of the technical solution of the utility model is that: the driving component includes grooves opened on both sides of the load-bearing vehicle body, and multiple sliding wheels are movably connected to the inner walls of the grooves, and the lower surfaces of the multiple sliding wheels are connected to the upper surface of the top plate. A driving motor is installed on the outer side of the load-bearing vehicle body, and the output shaft of the driving motor is connected to one end of the sliding wheel.

[0010] A further improvement of the technical solution of the utility model is that: limiting slide grooves are provided on both sides of the slide rail, a limiting slider is installed on the inner side of the load-bearing vehicle body, and the outer surface of the limiting slider is movably connected to the inner wall of the limiting slide groove.

[0011] A further improvement of the technical solution of the utility model is that limiting rings are installed at both ends of the slide rail.

[0012] A further improvement of the technical solution of the utility model is that notches are provided on both sides of the counterweight block.

[0013] A further improvement of the technical solution of the utility model is that a support column is installed on the outer surface of the model test box, one end of the support column is connected to a connecting pipe, a plurality of spray pipes are connected to the connecting pipe, and a plurality of pore water pressure gauges are also installed inside the model test box.

[0014] In summary, the beneficial effects of the utility model are:

[0015] The utility model provides a loess reinforced retaining wall model test device. Firstly, different numbers of counterweights can be selected on the adjusting vertical rod according to the needs, so that the bearing vehicle body has different gravity load conditions. The sliding wheel can be driven to rotate by a driving motor, so as to drive the bearing vehicle body to move back and forth along the top plate as a whole. Then, different positions, different speeds and different pressure conditions are simulated through the action of multiple groups of top loading mechanisms at different positions, so as to generate dynamic cyclic loads of vehicles under different conditions. With the action of the vertical pressure box and the lateral pressure box, the lateral pressure or vertical pressure change inside the model test box is detected in real time, so as to avoid the single test result and the one-sidedness, which leads to the inaccurate test result.

[0016] The utility model provides a loess reinforced retaining wall model test device, which simulates rainfall by spraying water through a spray pipe, and enters the interior of a model test box through pores on a top plate, thereby changing the humidity of a filler in the model test box, thereby obtaining different humidity conditions, and through the action of a pore water pressure gauge, real-time monitoring of changes in pore water pressure inside the model test box. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the utility model;

[0018] Figure 2 It is a structural schematic diagram of the top loading mechanism of the utility model;

[0019] Figure 3 This is a schematic diagram of the internal structure of the model test box of the utility model;

[0020] Figure 4 For this utility model Figure 2 Schematic diagram of the enlarged structure at point A in the middle.

[0021] In the figure: 1. Model test box; 2. Top plate; 3. Reinforced layer; 4. Vertical pressure box; 5. Horizontal pressure box; 6. Support column; 7. Connecting pipe; 8. Spray pipe; 9. Slide rail; 10. Limiting ring; 11. Carriage; 12. Sliding wheel; 13. Driving motor; 14. Adjusting vertical rod; 15. Counterweight; 16. Notch; 17. Fixing nut; 18. Limiting slide groove; 19. Limiting slider; 20. Pore water pressure gauge; 21. Wall panel.

[0022] The utility model is further described in detail below in conjunction with the embodiments. DETAILED DESCRIPTION Example

[0023] like Figure 1-4As shown, the utility model provides a loess reinforced retaining wall model test device, including a model test box 1, one side of the model test box 1 is movably connected with a wall panel 21, the top inner side of the top of the model test box 1 is connected with a top plate 2, the interior of the model test box 1 is filled with fillers, the composition and proportion of the fillers are both prior art, a plurality of groups of reinforcement layers 3 are laid inside the model test box 1, the reinforcement layers 3 are prior art, the reinforcement layers 3 are alternately filled with fillers, a plurality of vertical pressure boxes 4 and transverse pressure boxes 5 are installed inside the model test box 1, the vertical pressure boxes 4 and the transverse pressure boxes 5 are both commonly used pressure detection devices in the prior art, a plurality of groups of top loading mechanisms are installed on the top plate 2, firstly, the humidity of the internal fillers is adjusted by the action of the humidity adjustment mechanism, and then, different positions, different speeds and different pressures are simulated by the action of the plurality of groups of top loading mechanisms, and different vehicle dynamic cycle loads are generated, and the transverse pressure or vertical pressure change inside the model test box 1 is detected in real time by cooperating with the action of the vertical pressure box 4 and the transverse pressure box 5, so as to avoid the problem that the test results are single and one-sided, resulting in inaccurate test results.

[0024] Furthermore, the top loading mechanism includes a plurality of slide rails 9 installed on the upper surface of the top plate 2, a load-bearing body 11 is movably connected to the outer surface of the slide rails 9, an adjusting vertical rod 14 is installed on the upper surface of the load-bearing body 11, a counterweight 15 is movably connected to the outer surface of the adjusting vertical rod 14, a fixing nut 17 is threadedly connected to the outer surface of the adjusting vertical rod 14, and driving components are installed on both sides of the load-bearing body 11. Different numbers of counterweights 15 can be selected on the adjusting vertical rod 14 as needed, so that the load-bearing body 11 has different gravity load conditions, and cooperates with the action of the driving component to drive the load-bearing body 11 to reciprocate along the slide rails 9 as a whole, thereby obtaining the internal pressure changes of the model test box 1 under different conditions such as different moving speeds, frequencies, and positions.

[0025] Furthermore, the driving assembly includes grooves opened on both sides of the carrier body 11, and multiple sliding wheels 12 are movably connected on the inner walls of the grooves. The lower surfaces of the multiple sliding wheels 12 are connected to the upper surface of the top plate 2. A driving motor 13 is installed on the outer side of the carrier body 11, and the output shaft of the driving motor 13 is connected to one end of the sliding wheel 12. The driving motor 13 can drive the sliding wheel 12 to rotate, thereby driving the carrier body 11 as a whole to move back and forth along the top plate 2.

[0026] Furthermore, limiting grooves 18 are provided on both sides of the slide rail 9, and a limiting slider 19 is installed on the inner side of the supporting body 11. The outer surface of the limiting slider 19 is movably connected to the inner wall of the limiting groove 18. Through the clamping action of the limiting groove 18 and the limiting slider 19, the sliding range of the supporting body 11 is limited without the problem of the supporting body 11 slipping off the slide rail 9.

[0027] Furthermore, limit rings 10 are installed at both ends of the slide rail 9, so that the supporting vehicle body 11 can slide on the slide rail 9 as a whole without the problem of separation from the slide rail 9.

[0028] Furthermore, notches 16 are provided on both sides of the counterweight block 15 to facilitate lifting the counterweight block 15 and adjusting the number of counterweight blocks 15 arranged on the adjustment vertical rod 14, thereby generating different counterweight loads.

[0029] Furthermore, a support column 6 is installed on the outer surface of the model test box 1, one end of the support column 6 is connected to a connecting pipe 7, one side of the connecting pipe 7 is connected to a water inlet pipe, and is connected to an external water pump. A plurality of spray pipes 8 are connected to the connecting pipe 7, and rainfall conditions are simulated by the spray pipes 8. A plurality of pore water pressure gauges 20 are also installed inside the model test box 1. Pores are provided on the top plate 2 and the bottom of the model test box 1 to facilitate the simulation of precipitation circulation. Water is sprayed out through the spray pipes 8 and enters the model test box 1 through the pores on the top plate 2, thereby changing the humidity of the filler in the model test box 1, thereby obtaining different humidity conditions, and the pore water pressure changes inside the model test box 1 are monitored in real time by the pore water pressure gauge 20.

[0030] The working principle of the loess reinforced retaining wall model test device is explained in detail below.

[0031] like Figure 1-4 As shown, first, different numbers of counterweights 15 can be selected on the adjusting vertical rod 14 as needed, so that the load-bearing vehicle body 11 has different gravity load conditions. The sliding wheel 12 can be driven to rotate by the driving motor 13, thereby driving the load-bearing vehicle body 11 to move back and forth along the top plate 2 as a whole. Then, the action of multiple groups of top loading mechanisms at different positions is used to simulate different positions, different speeds and different pressure conditions, thereby generating different vehicle dynamic cyclic loads. In conjunction with the action of the vertical pressure box 4 and the lateral pressure box 5, the lateral pressure or vertical pressure change inside the model test box 1 is detected in real time.

[0032] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A loess reinforced retaining wall model test device, comprising a model test box (1), one side of the model test box (1) being movably connected to a wall panel (21), characterized in that: The top inner side of the model test box (1) is connected to a top plate (2), the interior of the model test box (1) is filled with fillers, a plurality of groups of reinforcement layers (3) are laid inside the model test box (1), the reinforcement layers (3) are alternately filled with fillers, a plurality of vertical pressure boxes (4) and horizontal pressure boxes (5) are installed inside the model test box (1), and a plurality of groups of top loading mechanisms are installed on the top plate (2); The top loading mechanism comprises a plurality of slide rails (9) mounted on the upper surface of the top plate (2); a load-bearing vehicle body (11) is movably connected to the outer surface of the slide rails (9); an adjusting vertical rod (14) is mounted on the upper surface of the load-bearing vehicle body (11); a counterweight block (15) is movably connected to the outer surface of the adjusting vertical rod (14); a fixing nut (17) is threadedly connected to the outer surface of the adjusting vertical rod (14); and drive components are mounted on both sides of the load-bearing vehicle body (11).

2. The loess reinforced retaining wall model test device according to claim 1, characterized in that: The driving assembly comprises grooves formed on both sides of the carrier body (11), a plurality of sliding wheels (12) being movably connected to the inner walls of the grooves, the lower surfaces of the plurality of sliding wheels (12) being connected to the upper surface of the top plate (2), a driving motor (13) being installed on the outer side of the carrier body (11), and an output shaft of the driving motor (13) being connected to one end of the sliding wheel (12).

3. The loess reinforced retaining wall model test device according to claim 1, characterized in that: Limiting slide grooves (18) are provided on both sides of the slide rail (9), and a limiting slide block (19) is installed on the inner side of the supporting vehicle body (11), and the outer surface of the limiting slide block (19) is movably connected to the inner wall of the limiting slide groove (18).

4. The loess reinforced retaining wall model test device according to claim 1, characterized in that: Limiting rings (10) are installed at both ends of the slide rail (9).

5. The loess reinforced retaining wall model test device according to claim 1, characterized in that: Notches (16) are provided on both sides of the counterweight block (15).

6. The loess reinforced retaining wall model test device according to claim 1, characterized in that: A support column (6) is installed on the outer surface of the model test box (1), one end of the support column (6) is connected to a connecting pipe (7), and a plurality of spray pipes (8) are connected to the connecting pipe (7). A plurality of pore water pressure gauges (20) are also installed inside the model test box (1).

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