Indoor equivalent model test device for prefabricated base block assembly type roadbed in complex environment

Abstract

The utility model relates to the fields of indoor model tests, fabricated roads, solid waste recycling and the like, in particular to a prefabricated base block fabricated roadbed complex environment indoor equivalent model test device. The system comprises a roadbed simulation system, a load simulation system, a temperature and humidity simulation system, a rainfall simulation system, a sensor monitoring system, a numerical control collection and analysis system and an assembly transmission system. According to the device, by integrating various functional systems, the overall structure performance test of prefabricated base block assembly type roadbed structures with different shapes and different solid waste raw material ratios in a complex environment is realized, the whole-course numerical control operation is realized, the automation degree is high, the manpower use is reduced, the research and development speed is increased, the field test research time is shortened, and the test efficiency is improved. And related parameters can be strictly controlled, and subsequent theoretical rule analysis is facilitated.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of test device, especially precast base block assembly type roadbed complex environment indoor equivalent model test device. BACKGROUND

[0002] In recent years, with the further development of ecological and environmental protection industry at home and abroad, and the proposal of carbon neutralization and carbon peak, solid waste treatment and its derivative industry has been paid more and more attention by the state and provinces and cities. A series of laws and regulations and industrial policies have been promulgated and implemented, and the bulk solid waste treatment industry is becoming more and more standardized. At present, bulk solid waste materials such as fly ash, coal gangue and calcium carbide slag have been widely used in construction, agriculture, road and mine backfill engineering scenes. Although these materials have been widely developed and applied, as of 2019, the comprehensive utilization rate of bulk solid waste in China only reached 55%. Therefore, the recycling method and field of bulk solid waste need to be further innovated and broadened, especially in places where it is difficult to take soil and where there is a lot of bulk solid waste, such as coal power plant area and mineral area. In order to solve the outstanding contradictions and common problems of large amount of solid waste production and storage, large occupation, low high-value resource utilization, high environmental protection requirements and difficulty in taking soil for road construction, it is considered to use bulk solid waste to fill roadbed. However, directly using solid waste to fill roadbed may cause pollution at the construction site, and the strength of the precast base block formed by dry pressing after curing is high, which can be preformed in the factory, causing less environmental pollution to the construction site and the surrounding area. Therefore, using the base block formed by dry pressing bulk solid waste to fill the roadbed is an effective method. SUMMARY

[0003] The utility model provides a kind of precast base block assembly type roadbed complex environment indoor equivalent model test device and its use method for the deficiency of bulk solid waste precast base block assembly type roadbed in prior art.The device solves the problems of lack of test equipment, single function, inconvenient operation and insufficient monitoring capacity in prior art by integrating multiple function systems.

[0004] The utility model provides a kind of precast base block assembly type roadbed complex environment indoor equivalent model test device, including roadbed simulation system, load simulation system, temperature and humidity simulation system, rainfall simulation system, sensor monitoring system, numerical control collection analysis system and assembly conveying system.

[0005] The roadbed simulation system is used to construct the precast base block assembly type roadbed structure of different solid waste ratio and shape, and the lowermost layer is the earth embankment, the two sides are provided with the slope, the earth embankment is paved with the impermeable geotextile, and the whole roadbed is formed by embedding lock above the impermeable geotextile, and the two sides of the whole roadbed are provided with the edge covering soil slope, and the slope thickness is 1.2m.

[0006] Further, the load simulation system is built-in with electro-hydraulic servo hydraulic device, through pressurized oil cylinder, oil cylinder inlet pipeline, oil cylinder outlet pipeline, connecting plate, top plate, loading column, base, side beam, limit block, back plate, observation window and fixing bolt to realize multi-directional loading and support static load and dynamic load flexible switching. The loading column can load test different positions of the prefabricated base block to verify the assembly interlocking performance.

[0007] In particular, the temperature and humidity simulation system includes temperature rising and falling device, humidifying device, drying device and exhaust port, which can simulate freeze-thaw cycle and dry-wet cycle environment. The temperature rising and falling device can ensure that the temperature difference in the freeze-thaw cycle process meets the test requirements by accurately controlling the temperature change range; the humidifying device and the drying device can adjust the humidity to the target value and maintain a stable state respectively.

[0008] Further, the rainfall simulation system includes water pump, rainfall spray head, water storage tank, throttle valve, water outlet, water inlet, electric door, water flow monitor and waterproof monitoring camera. The water pump delivers water in the water storage tank to the top of the rainfall spray head, and adjusts the rainfall amount through the throttle valve to make the rainfall infiltration meet the actual demand. The waterproof monitoring camera records the change of the roadbed surface in real time during the rainfall process, and the water flow monitor collects rainfall data.

[0009] In particular, the sensor monitoring system includes strain sensor, displacement sensor, pressure sensor, temperature sensor, humidity sensor, water flow monitor, environmental pollution monitoring sensor and waterproof monitoring camera. The strain sensor is arranged at the assembly interlocking position of the prefabricated base block for monitoring local stress distribution; the displacement sensor is installed on the overall structure of the roadbed to collect overall deformation data; the pressure sensor detects the compressive strength of the roadbed; the temperature sensor and the humidity sensor measure the environmental temperature and humidity respectively; the water flow monitor collects rainfall information; and the environmental pollution monitoring sensor evaluates the internal pollution degree of the roadbed.

[0010] Further, the numerical control collection and analysis system includes electronic display screen, control adjustment module, monitoring analysis module, high-definition monitoring display screen and working state display lamp of each stage. The electronic display screen displays specific numerical values of material mixing ratio, pressure, displacement, strain, temperature, humidity, rainfall, wind speed and pollution index and the like; the control adjustment module realizes precise control of loading pressure, loading position, dynamic load and static load switching, temperature, humidity and rainfall through multiple buttons; the monitoring analysis module generates parameter relationship curve diagram to provide basis for subsequent theoretical law analysis; the high-definition monitoring display screen is connected with the waterproof monitoring camera to display the internal working condition of the test device in real time; and the working state display lamp of each stage indicates the current running system.

[0011] Particularly, the assembly conveying system comprises a mechanical hand and an electric conveying track. The mechanical hand completes the automatic assembly of the prefabricated base block and is responsible for arranging the strain sensor; the electric conveying track conveys the completed roadbed simulation system to the load simulation system or the rainfall simulation system, ensuring smooth connection of the test process.

[0012] The use method of the utility model is as follows:

[0013] S1: the mechanical hand arranges the strain sensor and completes the automatic assembly of the prefabricated base block, forming a complete roadbed simulation system.

[0014] S2: the completed roadbed simulation system is moved to the load simulation system through the electric conveying track, static load or vibration load is applied, and the mechanical properties of the prefabricated base block assembly embedded position are tested.

[0015] S3: the temperature and humidity simulation system is started, temperature and humidity parameters are set according to the test scheme, and freeze-thaw cycle or dry-wet cycle simulation is carried out.

[0016] S4: the roadbed simulation system is conveyed to the rainfall simulation system through the electric conveying track, the rainfall amount is adjusted, and the rainfall infiltration condition is simulated.

[0017] S5: the sensor monitoring system collects stress, strain, displacement, temperature and humidity, water flow and pollution index and other parameters of the roadbed structure, and the numerical control collection and analysis system summarizes, monitors and analyzes the collected data, and generates a parameter relationship curve.

[0018] Further, the utility model also provides two prefabricated base block examples. The raw materials of the prefabricated base block of example 1 include fly ash 55 parts, carbide slag 25 parts, water glass 20 parts and water 40 parts by weight fraction, and the shape is a combination of main prefabricated base blocks and limiting prefabricated base blocks. The raw materials of the prefabricated base block of example 2 include fly ash 60 parts, carbide slag 20 parts, red mud 20 parts and water 45 parts by weight fraction, and the shape is a single prefabricated base block.

[0019] The utility model has the beneficial effects that:

[0020] By integrating the multifunctional system, the utility model realizes the simulation of various complex environments such as static load, dynamic load, vibration load, freeze-thaw cycle, dry-wet cycle, rainfall and wind speed, and overcomes the problem of single function of the test equipment in the prior art. The device is operated numerically throughout, has high automation degree, significantly reduces the labor input, and improves the research and development efficiency. In addition, the utility model has strong applicability and can test the performance of prefabricated base block assembly roadbed structures of different shapes and different solid waste raw material ratios, providing reliable data support for actual engineering application. Through multidirectional loading and flexible switching between static and dynamic loads, the mechanical properties of the prefabricated base block assembly roadbed structure are truly reflected, the research and development cycle is shortened, and the test cost is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a schematic diagram of the overall utility of the present application;

[0022] Figure 2 is a schematic diagram of the subgrade simulation system of the present application;

[0023] Figure 3 is a schematic diagram of the internal load simulation system of the present application;

[0024] Figure 4 is a schematic diagram of the rear load simulation system of the present application;

[0025] Figure 5 is a schematic diagram of the internal rainfall simulation system of the present application;

[0026] Figure 6 is a schematic diagram of the numerical control collection and analysis system of the present application;

[0027] Figure 7 is a schematic diagram of the Type I prefabricated base block structure of the present application;

[0028] Figure 8 is a schematic diagram of the Type I prefabricated base block assembly of the present application;

[0029] Figure 9 is a schematic diagram of the Type II prefabricated base block structure of the present application;

[0030] Figure 10 is a schematic diagram of the Type II prefabricated base block assembly of the present application.

[0031] The reference signs are as follows:

[0032] 100, subgrade simulation system; 110, embankment; 120, slope; 130, impermeable geotextile; 140, integral roadbed; 150, wrapped soil slope protection; 160, prefabricated base block; 161, main prefabricated base block; 162, limiting prefabricated base block; 200, load simulation system; 201, pressure cylinder; 202, cylinder oil inlet pipeline; 203, cylinder oil outlet pipeline; 204, connecting plate; 205, top plate; 206, loading column; 207, base; 208, side beam; 209, limiting block; 210, back plate; 211, observation window; 212, fixing bolt; 300, temperature and humidity simulation system; 301, temperature and humidity simulation system; 302, humidifying device; 303, drying device; 304, exhaust port; 400, rainfall simulation system; 401, water pump; 402, rainfall nozzle; 403, water storage tank; 404, throttle valve; 405, water outlet; 406, water inlet; 407, electric door; 500, sensor monitoring system; 501, strain sensor; 502, displacement sensor; 503, pressure sensor; 504, temperature sensor; 505, humidity sensor; 506, water flow monitor; 507, environmental pollution monitoring sensor; 508, waterproof monitoring camera; 600, numerical control collection and analysis system; 610, electronic display screen; 620, control and adjustment module; 621, pressure control and adjustment button; 622, dynamic and static load switching button; 623, temperature control and adjustment button; 624, humidity control and adjustment button; 625, rainfall control and adjustment button; 626, drying device control button; 627, mechanical hand control button; 628, electric transmission rail control button; 629, general switch and display lamp; 630, monitoring and analysis module; 640, high-definition monitoring display screen; 650, each stage working state display lamp; 700, assembly conveying system; 701, mechanical hand; 702, electric transmission rail. DETAILED DESCRIPTION

[0033] The utility model discloses a prefabricated base block assembly type subgrade complex environment indoor equivalent model test device, combine with attached Figure 1 to attached Figure 10 , the specific implementation mode is explained in detail. The device solves the problems of lack of test equipment, single function, inconvenient operation and insufficient monitoring capacity in the prior art by integrating multiple functional systems, and can comprehensively test the performance of prefabricated base block assembly type subgrade structures with different shapes and different solid waste raw material ratios.

[0034] For example Figure 1As shown, the overall structure of the utility includes a subgrade simulation system 100, a load simulation system 200, a temperature and humidity simulation system 300, a rainfall simulation system 400, a sensor monitoring system 500, a numerical control collection and analysis system 600, and an assembly conveying system 700. These systems work together to complete the performance test of the prefabricated base block assembly type subgrade under complex environment. The specific structure and operating principle of each system will be described in detail below.

[0035] The subgrade simulation system 100 is used to build prefabricated base block assembly type subgrade structures with different solid waste ratios and shapes. As shown in Figure 2 The lowermost layer of the subgrade simulation system 100 is a soil embankment 110, with side slopes 120 on both sides. An impermeable geotextile 130 is laid on the soil embankment 110, and an integral roadbed 140 is formed by interlocking above the impermeable geotextile 130. The integral roadbed 140 is provided with a wrapped soil slope 150 on both sides, with a thickness of 1.2 m. Prefabricated base blocks 160 are interlocked in the integral roadbed 140 to form a complete subgrade structure. Strain sensors 501 are arranged at the assembly interlocking position of the prefabricated base blocks 160 for monitoring local stress distribution. The mechanical hand 701 completes the automatic assembly of the prefabricated base blocks 160 and ensures that the assembly precision meets the test requirements.

[0036] The load simulation system 200 is mainly used to apply pressure to simulate the load conditions in actual road engineering. As shown in Figure 3 and Figure 4 The load simulation system 200 is built-in with an electro-hydraulic servo hydraulic device, which realizes multi-directional loading through a pressurized oil cylinder 201, an oil cylinder oil inlet pipeline 202, an oil cylinder oil outlet pipeline 203, a connecting plate 204, a top plate 205, a loading column 206, a base 207, a side beam 208, a limiting block 209, a rear plate 210, an observation window 211, and a fixing bolt 212. The loading column 206 can load test different positions of the prefabricated base blocks 160 to verify their assembly interlocking performance. The load simulation system 200 supports flexible switching between static load and dynamic load, and the adjustment of the loading mode is realized by controlling the dynamic load static load switching button 622 on the control adjustment module 620. The displacement sensor 502 is installed on the overall subgrade structure to collect overall deformation data; the pressure sensor 503 detects the compressive strength of the subgrade to ensure the safety and reliability of the loading process.

[0037] The temperature and humidity simulation system 300 includes a heating and cooling device 301, a humidifying device 302, a drying device 303, and an exhaust port 304, capable of simulating freeze-thaw cycles and wet-dry cycles. The heating and cooling device 301 precisely controls the temperature range to ensure the temperature difference during the freeze-thaw cycle meets experimental requirements. The humidifying device 302 and the drying device 303 adjust the humidity to the target value and maintain a stable state, while the humidity sensor 505 monitors the ambient humidity in real time. The temperature and humidity simulation system 300 allows setting temperature and humidity parameters according to the experimental plan, and precise control is achieved through the temperature control adjustment button 623 and the humidity control adjustment button 624 on the control and adjustment module 620.

[0038] The rainfall simulation system 400 includes a water pump 401, a sprinkler head 402, a water storage tank 403, a throttle valve 404, a water outlet 405, a water inlet 406, an electric gate 407, a water flow monitor 506, and a waterproof monitoring camera 508. For example... Figure 5 As shown, water pump 401 delivers water from storage tank 403 to above sprinkler head 402, and adjusts the rainfall amount through throttling valve 404 to ensure that rainfall infiltration meets actual needs. Waterproof monitoring camera 508 records changes in the roadbed surface in real time during rainfall, while water flow monitor 506 collects rainfall data. Rainfall simulation system 400 achieves precise control of rainfall through rainfall control adjustment button 625 on control and adjustment module 620.

[0039] The sensor monitoring system 500 includes a strain sensor 501, a displacement sensor 502, a pressure sensor 503, a temperature sensor 504, a humidity sensor 505, a water flow monitor 506, an environmental pollution monitoring sensor 507, and a waterproof surveillance camera 508. The strain sensor 501 is positioned at the assembly and locking location of the precast base block 160 to monitor local stress distribution; the displacement sensor 502 is installed on the overall roadbed structure to collect overall deformation data; the pressure sensor 503 detects the compressive strength of the roadbed; the temperature sensor 504 and humidity sensor 505 measure ambient temperature and humidity, respectively; the water flow monitor 506 collects rainfall information; and the environmental pollution monitoring sensor 507 assesses the degree of pollution within the roadbed. The sensor monitoring system 500 generates parameter relationship curves through the monitoring and analysis module 630, providing a basis for subsequent theoretical analysis.

[0040] The numerical control collection and analysis system 600 comprises an electronic display screen 610, a control and adjustment module 620, a monitoring and analysis module 630, a high-definition monitoring display screen 640 and stage working state display lamps 650. The electronic display screen 610 displays specific values of parameters such as material mixing ratio, pressure, displacement, strain, temperature, humidity, rainfall, wind speed and pollution index; the control and adjustment module 620 realizes precise control and adjustment of loading pressure size, loading position, dynamic load and static load switching, temperature, humidity and rainfall through a plurality of buttons; the monitoring and analysis module 630 generates a parameter relationship curve diagram to provide a basis for subsequent theoretical law analysis; the high-definition monitoring display screen 640 is connected with a waterproof monitoring camera 508 to display the internal working condition of the test device in real time; and the stage working state display lamps 650 indicate the current running system.

[0041] The assembly conveying system 700 comprises a mechanical hand 701 and an electric conveying track 702. The mechanical hand 701 completes automatic assembly of the prefabricated base block 160 and is responsible for arrangement of the strain sensor 501; the electric conveying track 702 conveys the completed roadbed simulation system 100 to the load simulation system 200 or the rainfall simulation system 400 to ensure smooth connection of the test process. The mechanical hand 701 and the electric conveying track 702 realize automatic operation through the mechanical hand control button 627 and the electric conveying track control button 628 on the control and adjustment module 620.

[0042] The use method of the utility is as follows: S1: The mechanical hand 701 arranges the strain sensor 501 and completes automatic assembly of the prefabricated base block 160 to form the complete roadbed simulation system 100. S2: The completed roadbed simulation system 100 is moved to the load simulation system 200 through the electric conveying track 702 to apply static load or vibration load and test the mechanical properties of the prefabricated base block 160 assembly interlocking position. S3: The temperature and humidity simulation system 300 is started, temperature and humidity parameters are set according to the test scheme, and freeze-thaw cycle or dry-wet cycle simulation is carried out. S4: The roadbed simulation system 100 is conveyed to the rainfall simulation system 400 through the electric conveying track 702 to adjust the rainfall size and simulate rainfall infiltration. S5: The sensor monitoring system 500 collects parameters such as stress, strain, displacement, temperature and humidity, water flow and pollution index of the roadbed structure, and the numerical control collection and analysis system 600 summarizes, monitors and analyzes the collected data to generate a parameter relationship curve diagram.

[0043] In order to further illustrate the applicability of the utility, two prefabricated base block examples are provided. The raw materials of the prefabricated base block of Example 1 comprise fly ash 55 parts, carbide slag 25 parts, water glass 20 parts and water 40 parts by weight, and the shape is a combination of the main prefabricated base block 161 and the limiting prefabricated base block 162, as shown in Figure 7 and Figure 8The precast base block raw material of example 2 includes fly ash 60 parts, carbide slag 20 parts, red mud 20 parts, water 45 parts by weight fraction, and the shape is single precast base block 160, as shown in Figure 9 and Figure 10 as shown.

[0044] The utility model discloses through integrated multifunctional system, realized static load, dynamic load, vibration loading, freeze-thaw cycle, dry-wet cycle, rainfall and wind speed and so on multiple complex environment's simulation, overcome the test equipment function single problem in the prior art. Full use numerical control operation, significantly reduce the manpower input, improve the research and development efficiency. In addition, the utility model has strong applicability, can test the performance of the prefabricated base block assembly type roadbed structure of different shapes, different solid waste raw material ratio, provides reliable data support for practical engineering application. Through multidirectional loading and static load dynamic load flexible switching, the mechanical properties of prefabricated base block assembly type roadbed structure are truly reflected, the research and development cycle is shortened, and the test cost is reduced

[0045] The above only for the preferred embodiment of the utility model has been, and does not limit the utility model, any modification, equivalent replacement and improvement etc. that are made within the spirit and principle of the utility model, should be included in the protection scope of the utility model.

Claims

1. A prefabricated base block assembled roadbed complex environment indoor equivalent model test device, characterized in that, It includes a roadbed simulation system (100), a load simulation system (200), a temperature and humidity simulation system (300), a rainfall simulation system (400), a sensor monitoring system (500), a numerical control data collection and analysis system (600), and an assembly and conveying system (700), wherein: The roadbed simulation system (100) is used to construct prefabricated block assembly roadbed structures with different solid waste ratios and shapes; The load simulation system (200) has a built-in electro-hydraulic servo hydraulic device, which performs load tests on different positions of the precast base block (160) through the loading column (206); The temperature and humidity simulation system (300) includes a heating and cooling device (301), a humidifying device (302), a drying device (303), and an exhaust port (304) for simulating freeze-thaw cycles and wet-dry cycles. The rainfall simulation system (400) includes a water pump (401), a rainfall nozzle (402), a water storage tank (403), a throttle valve (404), a water outlet (405), a water inlet (406), an electric gate (407), a water flow monitor (506), and a waterproof monitoring camera (508), used to simulate rainfall infiltration; the sensor monitoring system (500) includes a strain sensor (501), a displacement sensor (502), a pressure sensor (503), a temperature sensor (504), a humidity sensor (505), a water flow monitor (506), an environmental pollution monitoring sensor (507), and a waterproof monitoring camera (508); The numerical control data collection and analysis system (600) includes an electronic display screen (610), a control and adjustment module (620), a monitoring and analysis module (630), a high-definition monitoring display screen (640), and indicator lights for each stage of operation (650). The assembly conveying system (700) includes a robotic arm (701) and an electric conveying track (702); the bottom layer of the roadbed simulation system (100) is an earthen embankment (110), with slopes (120) on both sides. An impermeable geotextile (130) is laid on the earthen embankment (110), and an integral roadbed (140) is formed by interlocking the impermeable geotextile (130) on top. The integral roadbed (140) is provided with edging soil slope protection (150) on both sides, with a slope protection thickness of 1.2m; precast blocks (160) are interlocked in the integral roadbed (140), and strain sensors (501) are arranged at the assembly interlocking position of the precast blocks (160).

2. The prefabricated base block assembly type indoor equivalent model test device for complex environment of roadbed according to claim 1, characterized in that, The load simulation system (200) achieves multi-directional loading through pressurized oil cylinder (201), oil cylinder inlet pipeline (202), oil cylinder outlet pipeline (203), connecting plate (204), top plate (205), loading column (206), base (207), side beam (208), limit block (209), rear plate (210), observation window (211) and fixing bolts (212), and supports switching between static load and dynamic load.

3. The prefabricated base block assembly type indoor equivalent model test device for complex environment of roadbed according to claim 2, characterized in that, The loading column (206) can perform loading tests on different positions of the precast base block (160), and the displacement sensor (502) is installed on the overall roadbed structure to collect overall deformation data.

4. The prefabricated base block assembly type indoor equivalent model test device for complex environment of roadbed according to claim 1, characterized in that, The temperature and humidity simulation system (300) precisely controls the temperature variation range through the temperature and humidity changing device (301), and adjusts the humidity to the target value and maintains the stable state through the humidifying device (302) and the drying device (303) respectively.

5. The prefabricated base block assembly type indoor equivalent model test device for complex environment of roadbed according to claim 1, characterized in that, The rainfall simulation system (400) adjusts the rainfall amount through the throttle valve (404), and the waterproof monitoring camera (508) records the change of the roadbed surface in the rainfall process in real time.

6. The prefabricated base block assembly type indoor equivalent model test device for complex environment of roadbed according to claim 1, characterized in that, The assembly conveying system (700) completes the automatic assembly of the prefabricated base block (160) through the mechanical hand (701), and conveys the assembled roadbed simulation system (100) to the load simulation system (200) or the rainfall simulation system (400) through the electric conveying track (702).

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