Comprehensive simulation experiment device for weathering influence of rockfill material in stockpiling field

Abstract

The utility model discloses a stockpiling field rockfill material weathering influence comprehensive simulation experiment device, the device is provided with an atomization spraying mechanism, a sample placing chamber, a screening chamber and a drainage chamber in sequence from top to bottom, the atomization spraying mechanism is connected with the sample placing chamber, the sample placing chamber is communicated with the screening chamber, the screening chamber is communicated with the drainage chamber, a first screening barrel is arranged in the sample placing chamber, and a second screening barrel is arranged in the drainage chamber. A second screening barrel, a third screening barrel and a fourth screening barrel are arranged in the screening chamber, and a first screen, a second screen, a third screen and a fourth screen which are respectively arranged in the screening chamber and are sequentially reduced in mesh aperture are arranged in the screening chamber, and the measuring mechanism is respectively connected with the sample placing chamber, the screening chamber, the drainage chamber and the atomization spraying mechanism. According to the utility model, the sampling chamber and the screening chamber are separately arranged and are matched with the atomizing and spraying mechanism and the heating mechanism, so that the grading, particle size, permeability coefficient, quality and settlement change rules of the rockfill material in different weathering processes can be obtained, and reference can be provided for the selection of the compaction mode, crushing particle size and water and soil protection measures of the rockfill material before construction according to the change rules.

Description

Technical Field

[0001] This utility model relates to the technical field of stone weathering simulation devices, and in particular to a comprehensive simulation experimental device for the weathering effects of stockpiled stone in a storage yard. Background Technology

[0002] The changes in engineering properties and settlement deformation of riprap under long-term weathering conditions are difficult to predict, posing a threat to the long-term safe storage of riprap slopes. Riprap slopes are typically formed by excavated earth and rock or slag, a common feature in large-scale engineering projects. The earth and rock are exposed to natural conditions for extended periods, and the soft rock within them is prone to weathering and disintegration, leading to deformation and damage of the rock and soil mass, threatening the surrounding environment and residents' activities. The riprap in riprap has complex properties and composition, poor engineering properties, and its physical and mechanical parameters and settlement values ​​are difficult to obtain directly through calculation, requiring experimental determination. During weathering, the gradation, density, and permeability of the riprap change, affecting the overall physical and mechanical properties of the rock, leading to changes in the long-term stability of the slope, and even causing overall failure.

[0003] Current technical methods for studying rock weathering mainly consist of indoor geotechnical tests and simulation tests, including tests for disintegration resistance, water immersion disintegration, and weathering model boxes, as well as some small-scale wet-dry cycle tests. However, the test objects in these tests are relatively singular, mostly single or a few types of rocks, making it difficult to simultaneously consider the weathering and disintegration of complex riprap. Existing technologies also rarely provide direct engineering indicators such as gradation and permeability coefficients during the rock weathering process, and they also cannot consider the settlement and deformation of riprap, making it difficult to directly guide engineering practice. Utility Model Content

[0004] The purpose of this invention is to address the aforementioned problems by providing a comprehensive simulation experimental device for the weathering effects of riprap in stockpiles. This device solves the problem that existing technologies cannot directly provide engineering indicators such as gradation, density, and permeability coefficient of riprap under the physical weathering process of stockpiles on slopes. Through this device, the physical and mechanical properties of riprap under weathering can be studied, obtaining parameters such as mass, gradation, density, and permeability coefficient of riprap under multiple weathering and disintegration processes. Based on the experimental values, parameter basis can be provided for evaluating the engineering properties of riprap or calculating the long-term stability of slopes. This also solves the problem of predicting the settlement and deformation of riprap in stockpiles under existing technologies.

[0005] To achieve the above-mentioned objectives, the technical solution adopted by this utility model is as follows:

[0006] According to one aspect of the present invention, a comprehensive simulation experimental device for the weathering effects of rock stockpiles in a stockpile is provided, comprising an insulated outer shell, a sample placement chamber, a sieving chamber, a drainage chamber, an atomizing spray mechanism, a heating mechanism, and a measuring mechanism;

[0007] The sample placement chamber, the sieving chamber, and the heating mechanism are housed within the heat-insulating outer shell;

[0008] The atomizing spray mechanism, the sample placement chamber, the sieving chamber, and the drainage chamber are arranged sequentially from top to bottom. The atomizing spray mechanism is connected to the sample placement chamber. A first sieving bucket is installed in the sample placement chamber, and a first sieve is installed inside the first sieve bucket.

[0009] The screening chamber is provided with a second screening barrel, a third screening barrel and a fourth screening barrel from top to bottom. The first screening barrel is connected to the second screening barrel. A second screen is provided in the second screening barrel, a third screen is provided in the third screening barrel and a fourth screen is provided in the fourth screening barrel.

[0010] The mesh size of the first screen, the second screen, the third screen, and the fourth screen decreases sequentially.

[0011] The measuring mechanism is connected to the first screening barrel, the second screening barrel, the third screening barrel, and the fourth screening barrel respectively, and is used to measure the load-bearing capacity of the first screening barrel, the second screening barrel, the third screening barrel, and the fourth screening barrel;

[0012] The measuring mechanism is connected to the insulation shell and is used to measure the temperature inside the insulation shell;

[0013] The measuring mechanism is connected to the first screening bucket and is used to measure the water pressure at different heights inside the first screening bucket.

[0014] Preferably, the atomizing spray mechanism includes an atomizing nozzle and an infusion pipe, wherein the atomizing nozzle is connected to the top of the sample placement chamber, and the infusion pipe is connected to the atomizing nozzle.

[0015] Preferably, the drainage chamber includes a drainage hopper and a liquid outlet pipe, the drainage hopper being connected to the fourth screening bucket, and the liquid outlet pipe being connected to the drainage hopper.

[0016] Preferably, the heating mechanism includes a heating tube, which is fixedly disposed inside the heat-insulating outer shell.

[0017] Preferably, the measuring mechanism includes a weighing sensor, a temperature sensor, and a permeation measurement component. The weighing sensor is respectively disposed at the bottom of the first screening barrel, the second screening barrel, the third screening barrel, and the fourth screening barrel. The temperature sensor is fixedly disposed inside the heat insulation shell. The permeation measurement component is fixedly connected to the first screening barrel.

[0018] Preferably, the permeation measurement component includes a pressure measuring tube and a pressure gauge. Multiple pressure measuring tubes are provided and spaced apart along the vertical direction of the first screening barrel. One end of each pressure measuring tube is connected to the first screening barrel, and the other end is connected to the pressure gauge.

[0019] Preferably, the system also includes a top flow meter and a bottom flow meter, wherein the top flow meter is connected to the infusion tube and the bottom flow meter is connected to the outlet tube.

[0020] Preferably, it also includes a top cover, which is fixedly disposed on the top of the thermal insulation shell, and the top cover has an exhaust plate.

[0021] Preferably, it also includes an overflow pipe, one end of which is connected to the top of the sample placement chamber.

[0022] Preferably, it also includes a support net, which is fixedly disposed between the first screening barrel and the second screening barrel.

[0023] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0024] 1. This utility model, by setting up a screening bucket and screen, and cooperating with an atomizing spray mechanism, a measuring mechanism and a heating mechanism, can test the changes in physical parameters of rockfill material under different gradations and compaction methods as it weathers and disintegrates. Based on the change law, it can provide a reference for the selection of rockfill material compaction method, crushing particle size and soil and water protection measures before construction.

[0025] 2. This utility model controls the temperature and humidity environment changes of the rockfill sample through atomizing spray mechanism and heating mechanism, simulates and accelerates the natural weathering process of the rockfill sample, and obtains the rockfill quality, gradation, density, permeability coefficient and other indicators through the measuring mechanism, providing parameter basis for the evaluation of the engineering properties of rockfill in the stockpile and the calculation of the long-term stockpile stability of the slope.

[0026] 3. This utility model can study the overall characteristics of complex rockfill materials, with a wider research scope. It can also study the settlement value, mass loss and volume change of rockfill materials during the disintegration process, providing a reference for the long-term deformation prediction of stockpile slopes. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of this utility model;

[0028] Figure 2 This is a three-dimensional structural schematic diagram of the present invention;

[0029] Figure 3 This is a structural schematic diagram of the support mesh, cover plate, and first to fourth screens of this utility model;

[0030] Figure 4 This is a schematic diagram of the structure of the first to fourth screening barrels of this utility model.

[0031] In the attached diagram: 1. Insulation shell; 2. Sample chamber; 3. Sieving chamber; 4. Drainage chamber; 5. Top cover; 6. Exhaust plate; 7. Drainage chamber shell; 8. Cover plate; 9. Through hole; 10. Atomizing nozzle; 11. Infusion pipe; 12. First sieving tank; 13. First screen; 14. Support net; 15. Heating tube; 16. Weighing sensor; 17. Temperature sensor; 18. Top flow meter; 19. Bottom flow meter; 20. Pressure measuring tube; 21. Pressure gauge; 22. Temperature control panel; 23. Stress display panel; 24. Overflow pipe; 101. Insulation... 102. Insulated outer shell body; 103. First insulated outer shell door; 104. First insulated outer shell handle; 105. Second insulated outer shell handle; 201. Corrosion-resistant outer shell; 202. First corrosion-resistant outer shell door; 203. Second corrosion-resistant outer shell door; 204. Corrosion-resistant outer shell handle; 301. Second screening bucket; 302. Second screen; 303. Third screening bucket; 304. Third screen; 305. Fourth screening bucket; 306. Fourth screen; 401. Drainage hopper; 402. Liquid outlet pipe; 403. Water outlet valve. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided with reference to the accompanying drawings and preferred embodiments. However, it should be noted that many details listed in the specification are merely to provide the reader with a thorough understanding of one or more aspects of the utility model, and these aspects can be achieved even without these specific details.

[0033] Please see Figures 1 to 4 This utility model provides a comprehensive simulation experimental device for the weathering effects of rockfill in stockpiles, the technical solution of which is as follows:

[0034] A comprehensive simulation experimental device for the weathering effects of rockfill in a stockpile includes an insulated outer shell 1, a sample placement chamber 2, a sieving chamber 3, a drainage chamber 4, an atomizing spray mechanism, a heating mechanism, and a measuring mechanism. A top cover 5 is fixedly connected to the top of the insulated outer shell 1, and an exhaust plate 6 is provided on the top cover 5. A drainage chamber shell 7 is located at the bottom of the insulated outer shell 1, and the drainage chamber 4 is disposed within the drainage chamber shell 7. The sample placement chamber 2 and the sieving chamber 3 are fixedly disposed within the insulated outer shell 1, with the sample placement chamber 2 positioned above the sieving chamber 3. The atomizing spray mechanism includes an atomizing nozzle 10 and a liquid delivery pipe 11. The atomizing nozzle 10 is connected to the top of the sample placement chamber 2, and one end of the liquid delivery pipe 11 is connected to the atomizing nozzle 10, while the other end is connected to a water outlet or a storage tank. Liquid is atomized and sprayed out through the atomizing nozzle 10, entering the first sieving tank 12 through a through-hole 9, thereby altering the humidity in the sample placement chamber 2 and simulating the environment.

[0035] The thermal insulation shell 1 includes a thermal insulation shell body 101, a first thermal insulation shell door 102, and a second thermal insulation shell door 103. The first thermal insulation shell door 102 and the second thermal insulation shell door 103 are respectively hinged to the thermal insulation shell body 101. The first thermal insulation shell door 102 is located above the second thermal insulation shell door 103. A first thermal insulation shell handle 104 is fixedly installed on the outside of the first thermal insulation shell door 102, and a second thermal insulation shell handle 105 is fixedly installed on the outside of the second thermal insulation shell door 103. Two buckles are provided inside the thermal insulation shell to close the first thermal insulation shell door 102 and the second thermal insulation shell door 103. The sample chamber 2 includes a corrosion-resistant outer shell 201, which comprises a main body, a first corrosion-resistant outer shell door 202, and a second corrosion-resistant outer shell door 203. The first and second doors are hinged to the main body. A corrosion-resistant outer shell handle 204 is fixedly installed on the outer side of each door. A latch is provided on the inner wall of the outer shell 201 for closing the doors. A first screening barrel 12 is disposed inside the corrosion-resistant outer shell 201. A cover plate 8 is provided on the top of the first screening barrel 12, and multiple through holes 9 are provided on the cover plate 8. The cover plate 8 covers the top surface of the riprap, and an atomizing spray mechanism is provided above the cover plate 8. A support net and a measuring mechanism are provided at the bottom of the first screening barrel 12. By adding a covered plate 8 and a graduated first screening bucket 12, the mass, volume, density and settlement of the rockfill can be measured using a measuring mechanism, providing a reference for the selection of long-term stable support measures and compaction methods for rockfill in weathered storage sites.

[0036] A sieving chamber 3 is located at the lower end of the sample placement chamber 2. The sieving chamber 3 includes a second sieving barrel 301, a third sieving barrel 303, and a fourth sieving barrel 305. To improve support, a support net 14 is also included in this embodiment. The support net 14 is fixedly installed at the lower end of the sample placement chamber 2, located between the sample placement chamber 2 and the sieving chamber 3. The lower end of the second sieving barrel 301 is connected to the upper end of the third sieving barrel 303, and a second screen 302 is installed inside the second sieving barrel 301. The lower end of the third sieving barrel 303 is connected to the upper end of the fourth sieving barrel 305, and a third screen 304 is installed inside the third sieving barrel 303. The lower end of the fourth sieving barrel 305 is connected to the drainage chamber 4, and a fourth sieving barrel 305 is installed inside the fourth sieving barrel 305. The mesh size of the first screen 13, the second screen 302, the third screen 304, and the fourth screen 306 decreases sequentially. In this embodiment, the mesh size of the first screen 13 is 5 mm, the mesh size of the second screen 302 is 2 mm, the mesh size of the third screen 304 is 1 mm, and the mesh size of the fourth screen 306 is 0.5 mm. By setting screens with different mesh sizes, the rockfill material can be screened, and the changes in mass, particle size and gradation during the rockfill material disintegration process can be studied, providing a reference for the selection of compaction and crushing measures before the construction of rockfill material in the stockpile.

[0037] The drainage chamber 4 includes a drainage hopper 401 and a liquid outlet pipe 402. The drainage hopper 401 is located below the fourth screening chamber 305, and the liquid outlet pipe 402 is connected to the lower end of the drainage hopper 401. A water outlet valve 403 is installed on the liquid outlet pipe 402. The drainage chamber 4 is used to drain the water flowing from the sample placement chamber 2 through the screening chamber 3.

[0038] The heating mechanism includes heating tubes 15, which are fixedly installed on the inner wall of the heat insulation shell 1. In this embodiment, four heating tubes 15 are provided, two of which are installed on the outside of the sample placement chamber 2 and the other two are installed on the outside of the sieving chamber 3, so that the heating is more uniform.

[0039] The measuring mechanism includes a weighing sensor 16, a temperature sensor 17, and a permeation measurement component. The weighing sensor 16 is a high-temperature resistant weighing sensor, with four weighing sensors per layer, for a total of four layers. These four layers of weighing sensors 16 are fixedly installed at the bottom of the first screening chamber 12, the second screening chamber 302, the third screening chamber 304, and the fourth screening chamber 306, respectively, for measuring the load-bearing capacity of the screening chambers. The temperature sensor 17 is fixedly installed inside the insulation shell 1 for detecting the temperature inside the insulation shell 1. The permeation measurement component is connected to the sample placement chamber 2, the screening chamber 3, the drainage chamber 4, and the atomizing spray mechanism. The permeation measurement component includes a top flow meter 18, a bottom flow meter 19, a pressure measuring tube 20, and a pressure gauge 21. The top flow meter 18 is connected to the infusion tube 11 for measuring the liquid flow rate of the infusion tube 11. The bottom flow meter 19 is connected to the outlet tube 402 for measuring the liquid flow rate of the outlet tube 402. Multiple pressure measuring tubes 20 are provided. In this embodiment, three pressure measuring tubes 20 are provided, spaced apart from top to bottom along the sample chamber 2. One end of each pressure measuring tube 20 is connected to the inside of the sample chamber 2, and the other end is connected to a pressure gauge 21. The pressure measuring tubes 20 at different positions measure the water pressure at different locations. To allow for intuitive viewing of the test values ​​and control of the measuring mechanism, this embodiment also includes a temperature control panel 22 and a stress display panel 23. The temperature control panel 22 is connected to the heating tube 15 and the temperature sensor 17, respectively, and is used to control the heating tube 15 and receive the detection data from the temperature sensor 17, and display the detection data. The stress display panel 23 is connected to the weighing sensor 16 and is used to display the detection data from the weighing sensor 16. By adding a permeability measurement component, the permeability coefficient of the rockfill material under different weathering processes can be measured, providing a basis for calculating the rainfall or seepage stability of the slope considering weathering conditions.

[0040] Furthermore, to control the liquid level, this embodiment also includes an overflow pipe 24, the upper end of which is connected to the top of the sample chamber 2. The lower end of the overflow pipe 24 extends out of the outer shell of the drain chamber 4. The overflow pipe 24 is used to drain the water that is about to overflow from the sample chamber 2, which can control the water head and prevent the overflowing water from damaging the components inside the insulation shell 1.

[0041] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A comprehensive simulation experimental device for weathering impact of rockfill in a stockyard, characterized in that, The device comprises a heat preservation shell, a sample placing chamber, a screening chamber, a drainage chamber, an atomizing spraying mechanism, a heating mechanism and a measuring mechanism. The sample placing chamber, the screening chamber and the heating mechanism are arranged in the heat preservation shell. The atomizing spraying mechanism, the sample placing chamber, the screening chamber and the drainage chamber are arranged in sequence from top to bottom, the atomizing spraying mechanism is connected with the sample placing chamber, the sample placing chamber is provided with a first screening barrel, and the first screening barrel is provided with a first screen. The screening chamber is provided with a second screening barrel, a third screening barrel and a fourth screening barrel in sequence from top to bottom, the first screening barrel is communicated with the second screening barrel, the second screening barrel is provided with a second screen, the third screening barrel is provided with a third screen, and the fourth screening barrel is provided with a fourth screen. The mesh aperture of the first screen, the second screen, the third screen and the fourth screen decreases in sequence. The measuring mechanism is connected with the first screening barrel, the second screening barrel, the third screening barrel and the fourth screening barrel respectively, and is used for measuring the bearing capacity of the first screening barrel, the second screening barrel, the third screening barrel and the fourth screening barrel. The measuring mechanism is connected with the heat preservation shell, and is used for measuring the temperature in the heat preservation shell. The measuring mechanism is connected with the first screening barrel, and is used for measuring the water pressure at different heights in the first screening barrel.

2. The comprehensive simulation experimental device for the weathering influence of rockfill in a stockyard according to claim 1, characterized in that: The atomizing spraying mechanism comprises an atomizing nozzle and a liquid conveying pipe, the atomizing nozzle is connected with the top of the sample placing chamber, and the liquid conveying pipe is connected with the atomizing nozzle.

3. The device according to claim 2, characterized in that: The drainage chamber comprises a drainage hopper and a liquid outlet pipe, the drainage hopper is communicated with the fourth screening barrel, and the liquid outlet pipe is connected with the drainage hopper.

4. The device according to claim 1, characterized in that: The heating mechanism comprises a heating pipe, and the heating pipe is fixedly arranged in the heat preservation shell.

5. The device according to claim 3, characterized in that: The measuring mechanism comprises a weighing sensor, a temperature sensor and a permeation measuring assembly, the weighing sensor is arranged at the bottom of the first screening barrel, the second screening barrel, the third screening barrel and the fourth screening barrel respectively, the temperature sensor is fixedly arranged in the heat preservation shell, and the permeation measuring assembly is connected with the first screening barrel.

6. The device according to claim 5, characterized in that: The permeation measuring assembly comprises a pressure measuring pipe and a pressure gauge, a plurality of pressure measuring pipes are arranged, the pressure measuring pipes are arranged at intervals along the vertical direction of the first screening barrel, one end of the pressure measuring pipe is connected with the first screening barrel, and the other end is connected with the pressure gauge.

7. The device according to claim 6, characterized in that: The device further comprises a top flow meter and a bottom flow meter, the top flow meter is connected with the liquid conveying pipe, and the bottom flow meter is connected with the liquid outlet pipe. 8.The comprehensive simulation experimental device for the weathering influence of rockfill in a stockyard according to claim 1, characterized in that: The device further comprises a top cover, the top cover is fixedly arranged at the top of the heat preservation shell, and an exhaust plate is arranged on the top cover. 9.The comprehensive simulation experimental device for the weathering influence of rockfill in a stockyard according to claim 1, characterized in that: The device further comprises an overflow pipe, one end of the overflow pipe is connected with the top of the sample placing chamber.

10. The device according to claim 1, characterized in that: The device further comprises a supporting net, and the supporting net is fixedly arranged between the first screening barrel and the second screening barrel.

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