Novel multifunctional geotechnical model test device

Abstract

The utility model discloses a novel multifunctional geotechnical model test device which comprises a soil loading box, the soil loading box is formed by combining a fixed frame, a pedestal is arranged below the fixed frame, a soil unloading hole is formed in the top of the pedestal, transparent tempered glass is arranged on the front side and the rear side of the soil loading box, and the transparent tempered glass is arranged in the soil loading box. The tempered glass is fixed to the front side and the rear side of the soil containing box through angle steel on the inner side and the outer side of the fixed frame and a welding iron plate, a fixed motor box is arranged on the left side of the soil containing box, a movable motor box is arranged on the right side of the soil containing box, the fixed motor box and the movable motor box serve as a retaining wall motion control system, and idler wheels are arranged below the movable motor box to form a machine box moving system. A vertical loading system is arranged at the top of the soil loading box, a rainfall simulation system is arranged at the top of the soil loading box, and the rainfall simulation system is provided with a spraying structure. The utility model belongs to the field of civil engineering rock and soil, particularly relates to indoor model tests of foundation pits, retaining walls, foundations, side slopes and the like under various working conditions of rainfall, excavation, loading and the like, and aims to solve the problems that the engineering field test cost is too high and the test implementation difficulty is large.

Description

TECHNICAL FIELD

[0001] The utility model relates to civil engineering geotechnical engineering direction, concretely is a kind of indoor model test device for simulating foundation pit, retaining wall, foundation, slope and so on under the working condition of rainfall, excavation, loading. BACKGROUND

[0002] The novel device is mainly applied to indoor geotechnical model test.In recent years, with the development of social economy and the acceleration of urbanization, China's urbanization construction is changing rapidly.High-rise, super high-rise building, urban rail transit and large underground public facilities have emerged rapidly, and a large number of deep foundation pit support engineering and other underground engineering have emerged.Nowadays, deep foundation pit engineering has become the focus of research in the field of geotechnical engineering, and how to ensure the safety and stability of engineering structure is also the focus of research.The existing research wall-soil interaction model box is generally composed of a soil-filled box, a retaining wall movement control system and a moving plate, which can observe the test conditions of different types of retaining walls and soil bodies in three displacement modes (translation, rotation around the top and rotation around the bottom) under ideal conditions, but the actual engineering and working conditions that can be simulated are not complete.

[0003] The existing test equipment cannot simulate complex engineering conditions during use, such as the deformation and stress of soil under rainfall infiltration, and the existing test equipment can simulate fewer wall-soil interaction modes;in the case of simulating narrow foundation pits, if both sides of the retaining wall need to be loaded simultaneously, there may be uneven loading, and the bottom soil changes cannot be observed normally;the retaining wall may move during sand filling, resulting in test results that do not conform to reality;in the case of vertical loading, the speed and force of loading cannot be accurately controlled;and the test unloading efficiency is low. UTILITY MODEL CONTENT

[0004] The utility model aims to provide a novel multifunctional geotechnical model test device to solve the many shortcomings of the existing test equipment mentioned in the background.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a novel multifunctional geotechnical model test device.The test device includes a soil-filled box, which is composed of a fixed frame, a pedestal is arranged below the fixed frame, a soil unloading hole is arranged on the top of the pedestal, transparent tempered glass is arranged on the front and rear sides of the soil-filled box, the tempered glass is fixed to the front and rear sides of the soil-filled box by the inner and outer side angle steels and welded iron plates of the fixed frame, a fixed motor box is arranged on the left side of the soil-filled box, and a moving motor box is arranged on the right side, the fixed motor box and the moving motor box serve as a retaining wall movement control system, a roller is arranged below the moving motor box to form a motor box moving system, a vertical loading system is arranged on the top of the soil-filled box, a rainfall simulation system is arranged on the top of the soil-filled box, and the rainfall simulation system is provided with a spraying structure.

[0006] As the improvement, the bottom of the soil loading box is provided with pedestals on both sides, and the bottom end of each pedestal is provided with a self-locking universal wheel on both sides and in the middle.

[0007] As the improvement, the motion control system comprises a fixed motor box arranged on the left side and a movable motor box arranged on the right side, the motor box is provided with three motors arranged in the upper, middle and lower positions, the motor is provided with a support plate below, the motor is provided with a horizontal plate and a vertical plate connected with the support plate on the front and back sides, the fixed motor box is connected with a motor control box outside, the motor control box controls the operation of the motor, the motor is provided with a telescopic screw rod at the end, the telescopic screw rod is provided with a rotary connector at the end, the rotary connector is provided with a connecting hole at the front end, and the rotary connector is provided with a moving plate on one side, the moving plate is provided with a fixed support with a round hole, and the connecting hole and the fixed support are connected through a bolt.

[0008] As the improvement, the machine box moving system comprises a roller box arranged below the movable motor box on the right side, and the roller box is provided with not less than one roller below.

[0009] As the improvement, the vertical loading system comprises a counterforce frame arranged on the top of the soil loading box, and the fixed frame is provided with a row of bolt holes, and the counterforce frame is fixed on the fixed frame through bolts, so that the movement of the counterforce frame can be realized, and the indoor model test under the loading working condition can be simulated.

[0010] As the improvement, the rainfall simulation system comprises a water pump arranged on the left side of the soil loading box, a water tank connected with the water pump is arranged on the left side of the soil loading box, a fixed support is arranged on the top of the soil loading box, a water spraying pipe connected with the water pump is arranged on the top of the fixed support, and not less than one atomizing nozzle is arranged on the water spraying pipe.

[0011] As the improvement, the water spraying pipe is directly fixed on the fixed support through the fixing ring, and the structure is simple, and the detachable rainfall simulation system can be realized.

[0012] As the improvement, the slide rail moving system is connected with the barrier wall motion control system through the ball and the barrier wall, and the position of the barrier wall can be adjusted through the slide rail moving system under specific test conditions.

[0013] In the above technical scheme, the novel multifunctional soil model test device has the following beneficial effects:

[0014] 1. The utility model, this kind of novel multifunctional geotechnical model test device, the retaining wall motion control system, the moving plate is arranged along the tempered glass board left and right symmetry, but the case moving system only sets up at the right side, the left and right end retaining wall motion system can promote simultaneously, observes the interaction condition of two side walls and the soil body in the middle, studies its failure law, solves the difficult problem that single side wall cannot simulate actual engineering.

[0015] 2. The model box can simulate most engineering conditions, such as slope, can study bank slope, natural slope etc., can study the stability of slope or the vertical earth pressure variation of slope under vertical loading effect etc.; also can study the deformation, stability, bearing capacity etc. of foundation (flat foundation, slope foundation) ; also can study the deformation, displacement, earth pressure etc. of retaining wall parameter, replaces the moving plate of different material to simulate the retaining wall of different material.

[0016] 3. The novel multifunctional geotechnical model test device, the motor and screw rod rotating device of left and right sides symmetry are arranged 3 at equal interval height 25 centimeters respectively, the fixed support of rotating connector and moving plate is connected through connecting hole, and the connecting place is fixed through the bolt and can also be disassembled, and three connections can simulate more wall-soil interaction state through the disassembled mode.

[0017] 4. The novel multifunctional geotechnical model test device, the fixed frame of the model box is provided with angle steel outside four corners, and iron plate is welded at the four corners, to fix tempered glass, can observe the change of bottom soil during the test process, make the analysis result more accurate.

[0018] 5. The novel multifunctional geotechnical model test device, the model box bottom plate is provided with a circular unloading hole with a diameter of 2 centimeters at equal interval 50 centimeters left, middle and right ends, which is convenient for unloading test soil after test, and greatly improves the unloading efficiency.

[0019] 6. The novel multifunctional geotechnical model test device, the upper fixed support is convenient for fixing the water spray pipe in the rainfall simulation system, and the rainfall area and rainfall type can be freely controlled and adjusted according to the test requirement.

[0020] 7. The novel multifunctional geotechnical model test device, when the case moving system moves, it is fixed on the fixed frame through the bolt. The case moving system can flexibly control the distance between the two moving plates, and more conveniently simulate different test conditions. DETAILED DESCRIPTION

[0021] Figure 1 It is the three-dimensional schematic of the utility model Figure 1 .

[0022] Figure 2 It is the three-dimensional schematic of the utility model Figure 2 .

[0023] Figure 3 is a front view of the utility model.

[0024] Figure 4 is a retaining wall motion control system schematic diagram of the utility model.

[0025] Figure 5 is a case moving system schematic diagram of the utility model.

[0026] Figure 6 is a vertical loading system schematic diagram of the utility model.

[0027] Figure 7 is a rainfall simulation system schematic diagram of the utility model.

[0028] Figure 8 is Figure 4 A part detail enlarged view of the utility model.

[0029] Figure 9 is Figure 3 B part detail enlarged view of the utility model.

[0030] 1, toughened glass;2, moving plate;3, soil box;4, fixed frame;5, support plate;6, cross plate;7, vertical plate;8, angle steel and welded iron plate;9, unloading hole;10, pedestal;11, fixed support;12, motor;13, rotating connector;14, connecting hole;15, telescopic screw;16, fixed motor box;17, moving motor box;18, roller;19, counterforce frame;20, atomizing nozzle;21, water pump;22, water spraying pipe;23, water tank;24, fixed ring;25, motor control box;26, self-locking universal wheel;27, bolt hole;28, roller box;29, fixed support; DETAILED DESCRIPTION

[0031] The technical scheme in the utility model example will be described clearly and completely below in combination with the drawings in the utility model example. Apparently, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the utility model.

[0032] in combination with the drawings Figure 1 , the drawings Figure 2 and the drawings Figure 3The utility model relates to a new type multifunctional geotechnical model test device, including the soil box (3), the soil box (3) is combined by fixed frame (4), the fixed frame (4) is equipped with pedestal (10) below, the pedestal (10) top is equipped with unloading hole (9), the soil box (3) front and rear sides are equipped with transparent toughened glass (1), the toughened glass (1) is fixed in the front and rear sides of soil box (3) by the inside and outside angle steel of fixed frame (4) and welded iron sheet (8), the soil box (3) left side is equipped with fixed motor box (16), and right side is equipped with mobile motor box (17), and the fixed motor box (16) and mobile motor box (17) are as retaining wall movement control system, and the mobile motor box (17) below is equipped with gyro wheel (18), forms motor box moving system, and the soil box (3) top is equipped with vertical loading system, and the soil box (3) top is equipped with rainfall simulation system, and the rainfall simulation system is equipped with spraying structure.

[0033] combine with the Figure 2 In order to be stable as a whole, the bottom of the soil box (3) is equipped with a pedestal (10) on both sides, and the bottom of the pedestal (10) is equipped with a self-locking universal wheel (26) on both sides and in the middle, which is convenient for moving to any position.

[0034] combine with the Figure 4 and the Figure 8 In order to realize the required soil sample space of the soil box (3), a retaining wall movement control system is provided, which includes a fixed motor box (16) on the left side and a mobile motor box (17) on the right side. A support plate (5) is provided below the motor (12) in the motor box (16), and a connected horizontal plate (6) and vertical plate (7) are provided, which can be used to fix the motor (12). In order to realize the rotation or displacement of the moving plate (2) required in the test working condition, the motor control box (25) controls the operation of the motor (12), the motor (12) drives the extension screw rod (15) to rotate, and the extension screw rod (15) is provided with a rotating connector (13) and a moving plate (2) at the end, which can drive the moving plate (12) to rotate or displace.

[0035] combine with the Figure 5 In order to realize the horizontal movement of the mobile motor box (17), a motor box moving system is provided. A gyro wheel box (28) is provided below the right mobile motor box (17), and not less than one gyro wheel (18) is provided below the gyro wheel box (28). The mobile motor box can be moved to the required position of the test working condition by pushing.

[0036] combine with the Figure 6In order to realize the vertical loading, a vertical loading system is arranged, a counterforce frame (19) is arranged on the top fixed frame (4) of the soil loading box (3), a row of bolt holes (27) are arranged on the fixed frame (4), the vertical staged loading of the test soil body can be realized by cooperating with the jacks in the soil loading box, and the loading position can be freely adjusted.

[0037] In combination with the accompanying drawings Figure 7 and the accompanying drawings Figure 9 In order to realize the rainfall condition, a rainfall simulation system is arranged, a water pump (21) is arranged on the top left side of the soil loading box (3), the water pump (21) is provided with a water tank (23) and a water spraying pipe (22) connected thereto, a plurality of atomizing nozzles (20) are arranged on the water spraying pipe (22), the test soil body in the soil loading box can be sprayed by rain, and the free control of the rainfall area and the rainfall type can be realized.

[0038] In combination with the accompanying drawings Figure 9 The water spraying pipe (22) is directly fixed on the fixed support (11) through the fixing ring (24).

[0039] In the specific implementation, the three unloading holes (9) at the top end of the pedestal (10) are plugged by wooden plugs before test preparation, the distance between the two movable plates (2) is adjusted through the motor control box (25) and the case moving system. After the equipment is prepared, the test soil is filled, the equipment is started through the switch of the motor control box (25), the motor (12) provides power for the test to make the telescopic screw rod (15) start to rotate, so that the advancing or retreating of the rotating connector (13) is realized, the movable plate (2) is rotated or displaced, and the wall soil starts to interact. Different advancing modes of the rotating connector (13) can simulate different wall soil interaction modes, a high-definition camera is erected in front of the tempered glass (1) to shoot the test process, the test is carried out through the test elements embedded in the test soil body, and after various tests are completed, the wooden plugs at the unloading holes (9) are pulled out, and the test soil is poured out.

[0040] If rainfall is required, the water pump (21) is started, the water pump (21) directly draws water in the water tank (23) and directly sends the water to the atomizing nozzles (20) on the water spraying pipe (22), the atomizing nozzles (20) are opened or closed to freely control the simulated rainfall area, and the rainfall type is controlled by adjusting the pressure of the water pump (21). The structure is simple, and the detachable rainfall simulation system can be realized.

[0041] For the test requiring loading, the position of the counterforce frame (19) can be adjusted through the row of bolt holes (27) arranged on the fixed frame (4), and the test soil body can be conveniently vertically loaded through the external jacks.

[0042] It is apparent for a person skilled in the art that the present application is not restricted to the details of the above exemplary embodiments, but that it can be implemented in other concrete forms without departing from the spirit or the essential characteristics of the present application. Therefore, the embodiments should be considered as exemplary only, and not limiting, the scope of the present application being defined by the appended claims rather than the above description, and all changes coming within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference signs in the claims should not be construed as limiting the claims concerned.

Claims

1. A novel multifunctional geotechnical model testing apparatus, characterized by: The utility model provides a kind of soil loading box, including soil loading box (3), the soil loading box (3) is combined by fixed frame (4), the fixed frame (4) is equipped with pedestal (10) below, the pedestal (10) top is equipped with unloading hole (9), the soil loading box (3) front and rear sides are equipped with transparent toughened glass (1), the toughened glass (1) is fixed in the front and rear sides of soil loading box (3) by the inside and outside angle steel of fixed frame (4) and welded iron sheet (8), the soil loading box (3) left side is equipped with fixed motor box (16), right side is equipped with mobile motor box (17), the fixed motor box (16) and mobile motor box (17) are as retaining wall movement control system, the mobile motor box (17) is equipped with gyro wheel (18) below, forms machine box moving system, the soil loading box (3) top is equipped with vertical loading system, the soil loading box (3) top is equipped with rainfall simulation system, and the rainfall simulation system is equipped with spraying structure.

2. A novel multifunctional geotechnical model testing apparatus according to claim 1, characterized in that: The bottom of the soil loading box (3) is equipped with pedestal (10) on both sides, and the bottom of the pedestal (10) is equipped with self-locking universal wheel (26) on both sides and in the middle.

3. The novel multifunctional geotechnical model testing apparatus according to claim 1, characterized in that: The retaining wall movement control system includes a fixed motor box (16) on the left side and a mobile motor box (17) on the right side, the motor box is provided with three motors (12) at the top, middle and bottom, the motors (12) are provided with support plates (5) below, the motors (12) are provided with horizontal plates (6) and vertical plates (7) connected with the support plates (5) on both sides, the fixed motor box (16) is connected with a motor control box (25) outside, the motor control box (25) controls the operation of the motors (12), the motors (12) are provided with telescopic screws (15) at the ends, the telescopic screws (15) are provided with rotating connectors (13) at the ends, the rotating connectors (13) are provided with connecting holes (14) at the front ends, the rotating connectors (13) are provided with moving plates (2) on one side, the moving plates (2) are provided with fixed supports (29) with round holes, and the connecting holes (14) and the fixed supports (29) are connected by a latch.

4. The novel multifunctional geotechnical model testing apparatus according to claim 1, characterized in that: The machine box moving system includes a gyro wheel box (28) arranged below the mobile motor box (17) on the right side, and the gyro wheel box (28) is provided with not less than one gyro wheel (18) below.

5. The novel multifunctional geotechnical model testing apparatus according to claim 1, characterized in that: The vertical loading system includes a counterforce frame (19) arranged on the top of the soil loading box (3), and a row of bolt holes (27) are arranged on the fixed frame (4).

6. A novel multifunctional geotechnical model testing apparatus according to claim 1, characterized in that: The rainfall simulation system includes a water pump (21) arranged on the left side of the soil loading box (3), a water tank (23) connected with the water pump (21) is arranged on the left side of the soil loading box (3), a fixed support (11) is arranged on the top of the soil loading box (3), a water spraying pipe (22) connected with the water pump (21) is arranged on the top of the fixed support (11), and not less than one atomizing nozzle (20) is arranged on the water spraying pipe (22).

7. A novel multifunctional geotechnical model testing apparatus according to claim 6, characterized in that: The water spraying pipe (22) is directly fixed on the fixed support (11) by a fixing ring (24).

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