CN218036812U

CN218036812U - Visual model test device for simulating slope dead weight damage

Info

Publication number: CN218036812U
Application number: CN202221787992.3U
Authority: CN
Inventors: 赵炼恒; 张子健; 戴智颖; 左仕; 杨峰; 乔楠; 吕国顺; 谢启彬
Original assignee: Central South University
Current assignee: Central South University
Priority date: 2022-07-12
Filing date: 2022-07-12
Publication date: 2022-12-13
Anticipated expiration: 2032-07-12

Abstract

The utility model relates to a visual model test device of simulation side slope dead weight destruction belongs to geotechnical engineering and side slope engineering technical field. The device mainly comprises a model box, a slope forming device, a high-speed camera and test soil. Organic glass bonded by organic glue is arranged on two sides of the model box. The high-speed cameras are arranged above and on the side faces of the model box, and can shoot the damage condition of the side slope inside the model box through organic glass. The side slope forming device consists of a slide rail and a baffle plate, and can control the length of the rear edge of the side slope and the slope angle. Compared with the existing test device, the utility model can not only simulate the damage process of the side slope under the heavy load action of the slope top, but also directly simulate the instability of the side slope under the dead weight action; a large number of side slope models with different shapes can be conveniently generated; in addition, the damage condition of the test slope can be visually observed.

Description

Visual model test device for simulating slope dead weight damage

Technical Field

The utility model belongs to the technical field of geotechnical engineering and side slope engineering, a model test device is related to, concretely relates to visual model test device of simulation side slope dead weight destruction.

Background

China has a wide territory area and complex and changeable topography, and objectively results in a large number of engineering slopes and natural slopes. Under the action of loads such as dead weight, earthquake, vehicles, rainfall and the like and adverse working conditions, the slopes are easy to destabilize to generate landslides, and the safety of lives and properties of people is threatened. Therefore, the development of related indoor landslide model tests is of great significance for analyzing the stability of the slope and taking corresponding treatment measures.

At present, when a slope model test is carried out, a slope with an initial shape is mostly required to be filled, and then an external load (comprising a slope top loading mode, a centrifugal machine mode, a vibration table mode and the like) is applied to the slope so that the slope can be damaged. If the slide of the side slope under the action of the dead weight is studied, the side slope is difficult to be ensured not to be damaged when the initial side slope is filled, so that the traditional model box is difficult to carry out the side slope instability test under the action of the dead weight. In addition, the shape of the side slope is difficult to flexibly adjust by the existing model box, most of the existing model boxes can only realize the adjustment of a small amount of slope angles, and the adjusting device has a complex structure, and is not beneficial to the development of a landslide model test because the prefabricated template is required to be detached and installed. The instability of the side slope under the action of the dead weight is one of important working conditions for side slope damage; and as the simplest instability working condition, the method is also an important test basis for verifying the analysis theory and the numerical simulation result of the related slope stability. Therefore, the development of the slope model test under the action of the dead weight has very important practical significance.

In summary, the existing model box test about slope damage under the action of dead weight has a plurality of limitations and disadvantages. Therefore, the utility model provides a simple and reliable test device comes to carry out the unstability analysis to the side slope under the dead weight effect to the device and method can realize the nimble regulation of experimental side slope size, conveniently produce a large amount of test samples.

SUMMERY OF THE UTILITY MODEL

To the defect among the prior art, the utility model provides a visual model test device that simulation side slope dead weight destroyed.

In order to solve the above problems, the utility model provides a technical scheme does:

a visual model test device for simulating self-weight damage of a side slope comprises a model box, a side slope forming device and a high-speed camera; the model box is of a cubic structure, and a bottom plate with the size larger than that of the soil filling area is arranged below the model box; the side slope forming device comprises two parallel slide rails and a baffle plate; the sliding rails are welded on the model box through two steel sheets, and a first sliding block and a second sliding block are respectively connected on the two sliding rails in a penetrating manner; the baffle is connected with the first sliding block through a rotating shaft and can rotate around the rotating shaft so as to realize the adjustment of the slope angle; the top end of the baffle is connected with the second sliding block through an extension spring; two parallel hanging rods are arranged above the right side of the model box, the bottom end of the baffle is connected with the hanging rods through a first steel wire rope, and the top end of the baffle is connected with the hanging rods through a second steel wire rope; the high-speed cameras are arranged above and at the side parts of the model box and are used for shooting clear images of the top and the side of the model box; the test soil was filled from the top of the mold box.

The utility model discloses in, the mold box is the cube steel frame construction that forms by the shaped steel welding, and its open-top, the left and right sides passes through two organic glass of form bonding that the structure glued, and both sides welding has two steel sheets around.

The utility model discloses in, first slider with the second slider is provided with diameter 10 mm's screw hole, twists the screw pressure wherein and can fix the slider on the slide rail, the welding of second slider top has the couple that can hang extension spring.

In the utility model, the bottom of the baffle is provided with a handle for connecting a first steel wire rope, and the top of the baffle is provided with a round rod for connecting a second steel wire rope and a suspension extension spring; two circular rings are arranged on two sides of the middle part of the baffle close to the upper part, and a rotating shaft penetrates into the circular rings so that the baffle can rotate around the rotating shaft; the baffle plate can be made of steel or plastic. It should be noted that, in the utility model discloses in, extension spring can change different specifications according to specific experimental demand.

The utility model discloses in, first wire rope uses the U-shaped steel silk buckle to fix on peg and handle after adjusting length to reach restraint baffle clockwise pivoted effect.

The utility model discloses in, U type steel wire buckle is fixed on the peg to second wire rope's one end, and the other end passes through the wire rope fixed orifices and connects on the spring clamp, and the spring clamp can the centre gripping pole to realize the connection of second wire rope and baffle, reach restraint baffle anticlockwise rotation's effect.

The utility model discloses in, the spring clamp comprises the spring clamp steel sheet that two front ends have circular arc type separation blade, and two spring clamp steel sheets can fold along the spring clamp pivot of centre under the pulling force effect of spring clamp spring, enclose the round bar among circular arc separation blade, reach fixed second wire rope's effect.

As a general idea, the utility model also provides a test method of slope unstability under the effect of simulated gravity, including following step:

s1, preparing test materials and equipment

The test apparatus was made as required above and placed on a flat floor, with weights added to the edges of the floor to make the mold box more stable if necessary. And selecting test soil according to the requirements. And the high-speed camera is put in a proper position to be turned on.

S2, adjusting the size of the side slope

The first sliding block and the second sliding block are moved to proper positions and then screws are screwed into the screw holes to fix the sliding blocks, and the horizontal position of the baffle can be synchronously changed along with the position of the first sliding block due to the fact that the baffle is connected with the first sliding block, so that the effect of controlling the length of the rear edge of the side slope is achieved. When the horizontal position of the baffle is determined, the baffle can be rotated to achieve the purpose of adjusting the slope angle. After the baffle is rotated, the baffle can be connected with the hanging rod through the first steel wire rope and the second steel wire rope, and therefore the effect of limiting the rotation of the baffle is achieved. If the baffle is manually rotated, the pulling force of the extension spring is too large, so that the baffle is difficult to rotate by using a jack or a mechanical push rod.

S3, filling soil

After the position and the angle of the baffle are adjusted, required test soil can be filled from the opening at the top end of the model box to a proper height in a layered mode and compacted according to certain requirements. If the soil body is raised or sunken, the soil body needs to be leveled. Weights may also be placed at the trailing edge of the side slope to simulate the destabilization of the side slope under heavy loads.

S4, starting test

After the soil is filled, the first steel wire rope needs to be taken down firstly, and the baffle cannot rotate at present due to the effect of the soil pressure and the second steel wire rope. And then the spring clamp is opened, and at the moment, the baffle plate is not restrained by the second steel wire rope, so that the baffle plate can be quickly lifted under the tensile force of the extension spring, and the test soil can be damaged after the restraint of the baffle plate is avoided.

S5, analyzing test results

After the test is finished, the image recorded by the high-speed camera in the test process is processed and analyzed through image processing software, and test parameters such as a sliding belt, a sliding distance and the like of the side slope are obtained.

S6, repeat the test

Changing the shape of the side slope, and repeating the steps S1-S5 to research the soil body destruction rules of the side slopes with different shapes.

Compared with the prior art, the beneficial effects of the utility model are that:

(1) The utility model discloses both sides are two organic glass, are convenient for survey the soil body slip condition in the mold box.

(2) The utility model discloses a spring trigger device controls the slip of the experimental soil body, not only can simulate the side slope unstability under the outer load effect but also can simulate the process of side slope unstability under the dead weight effect.

(3) The utility model discloses a side slope forming device can generate the multiple not unidimensional side slope that has, and easy operation, need not to dismantle prefabricated template, has greatly improved test efficiency.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, it is obvious that the drawings in the following descriptions are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a front view of the present invention;

FIG. 2 is a schematic three-dimensional configuration of a mold box;

FIG. 3 is a front view of the slide rail;

FIG. 4 is a top view of the slide rail;

FIG. 5 is a schematic three-dimensional configuration of a baffle;

FIG. 6 is a schematic view of the installation of a U-shaped wire clip;

fig. 7 is a three-dimensional construction of a spring clip.

Illustration of the drawings:

1. a model box; 2. a slope forming device; 3. a high-speed camera; 4. soil for test; 5. A slide rail; 6. a baffle plate; 7. a bottom plate of the model box; 8. welding steel sheets on the sliding rails; 9. a first slider; 10. a second slider; 11. a first wire rope; 12. a second wire rope; 13. an extension spring; 14. organic glass; 15. a steel plate; 16. a hanging rod; 17. a screw hole; 18. a spring hook; 19. a rotating shaft; 20. a handle; 21. a round bar; 22. a circular ring; 23. u-shaped steel wire buckles; 24. a spring clip; 25. the spring clamps the steel sheet; 26. a spring clamp spring; 27. a wire rope fixing hole; 28. the spring clip is provided with a rotating shaft.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.

Example 1

A visual model test device for simulating self-weight damage of a side slope is shown in figures 1 and 2, and comprises a model box 1, a side slope forming device 2 and a high-speed camera 3; the model box 1 is of a cubic structure, and a bottom plate 7 with the size larger than that of a soil filling area is arranged below the model box; the side slope forming device 2 comprises two parallel slide rails 5 and a baffle 6; the sliding rails 5 are welded on the model box 1 through two steel sheets 8, and a first sliding block 9 and a second sliding block 10 are respectively connected on the two sliding rails 5 in a penetrating manner; the baffle 6 is connected with the first slide block 9 through a rotating shaft 19 and can rotate around the rotating shaft 19 so as to realize the adjustment of the slope angle; the top end of the baffle 6 is connected with a second sliding block 10 through an extension spring 13; two parallel hanging rods 16 are arranged above the right side of the model box 1, the bottom end of the baffle 6 is connected with the hanging rods 16 through a first steel wire rope 11, and the top end of the baffle 6 is connected with the hanging rods 16 through a second steel wire rope 12, so that the length of the baffle is convenient to adjust due to moderate hardness of the steel wire ropes, the angle and the position of the baffle 6 can be favorably adjusted, and the rotation of the baffle 6 is restrained; the high-speed cameras 3 are arranged above and at the side parts of the model box 1 and are used for shooting clear images of the top and the side of the model box; the test soil 4 was filled from the top of the mold box 1.

The structure of the model box 1 in this example is shown in fig. 2, the inner wall size is 1200mm × 600mm × 300mm, the top end is open, the left and right sides are transparent organic glass 14 fixed by glue, and the front and back sides are provided with steel plates 15.

In this example, the height of the side slope model manufactured by the control molding device is 500mm, the length of the rear edge of the side slope is 630mm, the extension length of the front end of the side slope is 280mm, the height is 130mm, and the width of the model is 300mm.

In the slope forming device 2 of the present embodiment, as shown in fig. 1 to 5, the first slider 9 and the second slider 10 on the slide rail 5 are fixed by screwing screws into the screw holes 17, and the control baffle 6 is located at the middle position of the slide rail 5. The baffle 6 is restrained to rotate by a first steel wire rope 11 and a second steel wire rope 12, and the included angle of the baffle 6 is controlled to be 60 degrees. In this example, adopt wire rope restraint baffle 6 to rotate, it is more convenient when the angle of adjusting baffle 6.

The soil 4 for test in the example can adopt 8mm mud pills, and a gypsum model simulating block stones is filled in the soil to achieve the effect of simulating a soil-stone mixture, and the soil is compacted automatically under the action of gravity after being filled to a specified height and leveled.

The high speed camera 3 employed in this example is fixed above and to the side of the model box by means of a tripod.

Example 2

A test method of a visual model test device for simulating slope dead weight damage comprises the following steps:

(1) Preparation of test materials and devices

The test apparatus is made as required and placed on a flat ground surface, with weights added to the edges of the base plate 7 to make the mould box more stable if required. The test soil 4 is selected according to the needs of the user. And the high-speed camera is put in a proper position to be turned on.

(2) Adjusting the size of the slope

After the first sliding block 9 and the second sliding block 10 are moved to proper positions, screws are screwed into the screw holes 17 to fix the sliding blocks, and as the baffle 6 is connected with the first sliding block 9, the horizontal position of the baffle 6 can also be synchronously changed along with the position of the first sliding block 9, so that the effect of controlling the length of the rear edge of the slope is achieved. When the horizontal position of the baffle 6 is determined, the baffle can be rotated to achieve the purpose of adjusting the slope angle. After the baffle 6 is rotated, the baffle 6 can be connected with the hanging rod 16 through the first steel wire rope 11 and the second steel wire rope 12, so that the effect of limiting the rotation of the baffle is achieved. If the baffle 6 is rotated manually, the pulling force of the spring 13 is too large, so that the baffle 6 can be rotated by using a jack or a mechanical push rod. The purpose of adjusting the size of the side slope can be achieved through the operation.

(3) Filling soil

After the position and angle of the baffle 6 are adjusted, the required test soil 4 can be filled into the opening at the top end of the model box 1 to a proper height layer by layer and compacted according to certain requirements. If the soil body is raised or sunken, the soil body needs to be leveled. And a heavy object can be placed at the rear edge of the soil body to simulate the instability process of the slope under the action of heavy load.

(4) Initial test

After the soil filling is completed, the first steel wire rope 11 needs to be taken down, and the baffle 6 cannot rotate at present due to the effect of the soil pressure and the second steel wire rope 12. Then the spring clamp 24 is opened, and at this time, the baffle 6 is not restrained by the steel wire rope 12, and can be quickly lifted under the tensile force of the extension spring 13, and the test soil body 4 can be damaged after being restrained by the baffle 6.

(5) Analysis of test results

After the test is finished, the image recorded by the high-speed camera 3 in the test process is processed and analyzed through image processing software, and test parameters such as a sliding belt, a sliding distance and the like of the side slope are obtained.

(6) Repeat the test

Changing the shape of the side slope, and repeating the steps (1) to (5) to research the soil body destruction rules of the side slopes with different shapes.

It should be understood that the above-described embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications can be made without departing from the scope of the invention.

Claims

1. A visual model test device for simulating slope dead weight damage is characterized by comprising a model box (1), a slope forming device (2) and a high-speed camera (3); the model box (1) is of a cubic structure, and a bottom plate (7) with the size larger than that of a soil filling area is arranged below the model box; the side slope forming device (2) comprises two parallel slide rails (5) and a baffle (6); the sliding rails (5) are welded on the model box (1) through two steel sheets (8), and a first sliding block (9) and a second sliding block (10) are respectively connected on the two sliding rails (5) in a penetrating manner; the baffle (6) is connected with the first sliding block (9) through a rotating shaft (19) and can rotate around the rotating shaft (19) so as to realize the adjustment of the slope angle; the top end of the baffle (6) is connected with the second sliding block (10) through an extension spring (13); two parallel hanging rods (16) are arranged above the right side of the model box (1), the bottom end of the baffle (6) is connected with the hanging rods (16) through a first steel wire rope (11), and the top end of the baffle is connected with the hanging rods (16) through a second steel wire rope (12); the high-speed cameras (3) are arranged above and at the side parts of the model box (1) and are used for shooting clear images of the top and the side of the model box; the test soil (4) is filled from the upper part of the model box (1); the first sliding block (9) and the second sliding block (10) are provided with threaded holes (17) for fixing, and spring hooks (18) connected with the extension springs (13) are welded at the top of the second sliding block (10).

2. The visual model test device for simulating slope self-weight damage according to claim 1, characterized in that: the model box (1) is a cubic steel frame structure formed by welding profile steels, the top end of the model box is open, the left side and the right side of the model box are bonded with two pieces of organic glass (14) in a structural adhesive mode, and the front side and the rear side of the model box are welded with two steel plates (15).

3. The visual model test device for simulating slope deadweight failure according to claim 1, characterized in that: the bottom of the baffle (6) is provided with a handle (20) used for connecting a first steel wire rope (11), and the top of the baffle is provided with a round rod (21) used for connecting a second steel wire rope (12) and a suspension extension spring (13); two circular rings (22) are arranged on two sides of the middle part of the baffle (6) close to the upper part, and a rotating shaft (19) penetrates into the circular rings.

4. The visual model test device for simulating slope deadweight failure according to claim 3, characterized in that: two ends of the first steel wire rope (11) are fixed on the hanging rod (16) and the handle (20) through U-shaped steel wire buckles (23).

5. The visual model test device for simulating slope deadweight failure according to claim 3, characterized in that: one end of the second steel wire rope (12) is fixed on the hanging rod (16) by using a U-shaped steel wire buckle (23); the other end of the steel wire rope is connected with a spring clamp (24) through a steel wire rope fixing hole (27), and the spring clamp (24) clamps the round rod (21), so that the second steel wire rope (12) is connected with the baffle (6).

6. The visual model test device for simulating slope self-weight damage according to claim 5, characterized in that: the spring clamp (24) is composed of two spring clamp steel sheets (25) with arc-shaped blocking sheets at the front ends, and the two spring clamp steel sheets (25) can be folded along a spring clamp rotating shaft (28) in the middle under the tensile force action of a spring clamp spring (26) to enclose the round rod (21) in the arc-shaped blocking sheets.