CN112684147A - Rock slope excavation model test device and method under multi-field coupling effect - Google Patents
Rock slope excavation model test device and method under multi-field coupling effect Download PDFInfo
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- CN112684147A CN112684147A CN202011583823.3A CN202011583823A CN112684147A CN 112684147 A CN112684147 A CN 112684147A CN 202011583823 A CN202011583823 A CN 202011583823A CN 112684147 A CN112684147 A CN 112684147A
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- 238000012360 testing method Methods 0.000 title claims abstract description 64
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- 238000000034 method Methods 0.000 title claims description 18
- 230000007246 mechanism Effects 0.000 claims abstract description 54
- 238000005422 blasting Methods 0.000 claims abstract description 36
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 45
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- 230000001105 regulatory effect Effects 0.000 claims description 9
- 238000013401 experimental design Methods 0.000 claims description 7
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- 238000002156 mixing Methods 0.000 claims description 3
- 239000000565 sealant Substances 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 238000010998 test method Methods 0.000 claims description 3
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Abstract
The invention relates to a rock slope excavation model test device under the multi-field coupling effect, which comprises: the model box body is used for loading a slope model; the rainfall seepage mechanism is used for generating rainfall on the slope model so as to simulate the rainfall condition; the blasting vibration mechanism is used for generating vibration and the vibration acts on the slope model to simulate the blasting condition; the horizontal loading mechanism is used for applying horizontal load to the slope model so as to simulate the initial stress field of the rock slope. The test device can be used for rock slope model test research under rainfall, blasting vibration and excavation unloading coupling effects, external influence factors of slope deformation and damage are comprehensively considered, and reliability of mine slope stability research is effectively improved.
Description
Technical Field
The invention relates to the technical field of slope model experiment equipment, in particular to a rock slope excavation model test device and method under the multi-field coupling effect.
Background
Landslide disasters often occur in surface mining engineering, and the instability and damage of the mine side slope not only can influence the normal operation of mining work, but also can cause a great amount of casualties and economic losses. Therefore, landslide disaster mechanisms, control, monitoring and early warning in surface mining are always the research focus in the field of mining slope engineering. The combined action of one or more factors such as rainfall seepage, blasting vibration, excavation unloading and the like is a main reason for inducing deformation and damage of the mine slope, so that the deep research on the mine slope instability rule under the multi-field coupling action of the rainfall seepage, the blasting vibration and the like has important theoretical significance and engineering practical value for efficient mining of the mine.
The slope model test can vividly and intuitively simulate the whole process of stress, deformation and damage of a slope, reveal the influence of controllable influence factors on the landslide disaster-causing inoculation and evolution process, is always favored by scholars in the slope field, obtains a large amount of meaningful research results, and still has some defects. The existing model test device has the following problems: firstly, the function of the side slope model test device is single, the influence of rainfall seepage, blasting vibration and other single factors on the stability of the rock slope is only considered, and the influence of multiple factors on the stability of the side slope cannot be researched; secondly, the initial state of the side slope is considered to be incomplete, and the influence of an initial stress field is ignored; and thirdly, the slope model under the multi-factor coupling effect is greatly interfered by equipment and human factors, and a test result has certain deviation from a real situation.
Therefore, the slope model test simulation under the combined action of factors such as rainfall seepage, blasting vibration and excavation unloading is difficult, and obstacles are generated for the follow-up development of studies such as slope stability, landslide monitoring and early warning and the like.
Disclosure of Invention
The application provides a rock slope excavation model test device and method under the multi-field coupling effect, which solve or partially solve the technical problem that the prior art cannot simulate a slope model test under the combined action of factors such as rainfall seepage, blasting vibration, excavation unloading and the like; the rock slope excavation model test device under the multi-field coupling effect can be used for carrying out rock slope model test research under the rainfall, blasting vibration and excavation unloading coupling effect, external influence factors of slope deformation and damage are comprehensively considered, and reliability of mine slope stability research is effectively improved.
The application provides a rock matter side slope excavation model test device under multi-field coupling effect includes: a model box body, a rainfall seepage mechanism, a blasting vibration mechanism and a horizontal loading mechanism, wherein,
the model box body is used for loading a slope model; the top of the model box body is open, and the bottom of the model box body is provided with a drain hole; the model box body is provided with a front side plate made of transparent materials;
the rainfall seepage mechanism is used for generating rainfall on the side slope model so as to simulate rainfall conditions;
the blasting vibration mechanism is used for generating vibration and the vibration acts on the slope model to simulate blasting conditions;
the horizontal loading mechanism is used for applying horizontal load to the side slope model so as to simulate an initial stress field of the rock slope.
Preferably, the slope model is formed by stacking prefabricated blocks with barite powder, quartz sand and iron powder as aggregates.
Preferably, the side slope model is provided with an excavation block, and the excavation block can be taken out at any time in the test process through reserving an excavation surface.
Preferably, the drain hole is arranged at the right side of the bottom plate of the model box body, the drain hole is connected with a drain pipe, and a water stop valve is arranged on the drain pipe;
the front side plate of the model box body is made of toughened glass, and the gaps among the front side plate, the bottom plate, the left side plate and the right side plate of the model box body are filled with sealant;
a coordinate grid is arranged on the front side plate;
and the bottom of the model box body is provided with a plurality of universal wheels.
Preferably, the rainfall seepage mechanism comprises: a rainfall support, a plurality of spray heads, branch pipelines, a water supply pipeline, a flow regulating valve, a flow meter, a water pump and a bucket,
the rainfall support is fixed at the top of the model box body;
the plurality of spray heads are fixed on the rainfall support;
the spray head is communicated with the water supply pipeline through the branch pipeline;
the water supply pipeline is connected with the output end of the water pump through a hose;
the input end of the water pump is communicated with the water barrel;
the flow regulating valve and the flow meter are arranged on the water supply pipeline.
Preferably, the blast vibration mechanism includes: a vibration base, a plurality of pillars, a vibration motor and a vibration rod,
the vibration base is fixed at the lower part of the right end of the model box body;
the plurality of upright columns are arranged on the vibration base and are of telescopic structures;
the vibration motors are fixed on the plurality of upright posts;
one end of the vibrating rod is fixed at the output end of the vibrating motor, and the other end of the vibrating rod is abutted against the right side of the side slope model, so that the vibration of different frequencies and amplitudes generated by the vibrating motor is transmitted to the side slope model.
Preferably, the horizontal loading mechanism includes: a hydraulic device, an oil cylinder and a pressure plate,
the hydraulic equipment is arranged at the lower part of the left end of the model box body through a fixed support;
the oil cylinder is fixed on the upper part of the left end of the model box body; the hydraulic equipment is connected with the oil cylinder through a pressure pipe so as to convey high-pressure oil to the oil cylinder;
the pressing plate is arranged in the model box body and abuts against the left side of the side slope model; and a piston rod of the oil cylinder is connected with the pressing plate so as to drive the pressing plate to apply horizontal compressive stress to the side slope model.
Preferably, a sealing ring is arranged between the pressure plate and the model box body;
a plurality of resistance-type miniature soil pressure gauges are arranged on the pressure plate;
the resistance type miniature soil pressure gauge is connected with a resistance strain tester so as to send the horizontal stress value loaded by the pressing plate to the resistance strain tester.
Based on the same inventive concept, the application also provides a rock slope excavation model test method under the multi-field coupling effect, which is realized by the rock slope excavation model test device under the multi-field coupling effect, and comprises the following steps:
determining the using amount of aggregate according to the size of the side slope model, determining the mixing proportion of the aggregate through a mechanical test, and manufacturing a rock block by using the aggregate;
piling the side slope model designed by the test through the rock blocks;
according to the pressure value of the experimental design, applying horizontal stress to the side slope model through the horizontal loading mechanism;
according to the rainfall of the experimental design, carrying out rainfall on the side slope model through the rainfall seepage mechanism;
applying vibration to the slope model through the blasting vibration mechanism according to the vibration frequency, the amplitude and the vibration position of the experimental design;
timely taking out the excavation block in the side slope model according to test requirements;
in the test process, the deformation and damage conditions of the side slope model are observed and recorded, and the deformation data of the side slope model are collected.
Preferably, before the side slope model is built, the grain diameter, the uniformity and the rainfall intensity of raindrops in the rainfall seepage mechanism are calibrated;
when the side slope model is built, gaps among the rock blocks are filled with lubricant, and a monitoring strain sensor, a moisture content sensor and an acceleration sensor are embedded;
when horizontal stress is applied to the slope model through the horizontal loading mechanism, the slope model is horizontally loaded through a pressing plate, and stress change of the pressing plate is collected through a resistance type miniature soil pressure meter;
when the rainfall seepage mechanism is used for carrying out rainfall on the side slope model, sufficient test water is stored in a bucket, the initial value of a flow meter is recorded, a water pump is started, the rainfall is adjusted and controlled through a flow regulating valve, and a rainfall test is started;
when the blasting vibration mechanism applies vibration to the side slope model, a vibration motor is started to control vibration frequency and amplitude, and a strut is adjusted to control the position of a vibration rod so as to control the vibration position of the side slope model;
in the test process, the deformation and damage conditions of the side slope model are observed and recorded through a coordinate grid on a front side plate of the model box body, and the deformation data of the side slope model is collected at any time through a buried sensor.
One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:
the rock slope excavation model test device can be used for carrying out rock slope model test research under the influence of rainfall seepage factors (different rainfall intensities and rainfall duration), blasting vibration factors (amplitude and frequency) and excavation unloading factors (different graded excavation and slope states) and disclosing a destabilization mechanism of rock slope excavation under the coupling action of rainfall seepage and blasting vibration. The horizontal loading mechanism is established to provide horizontal load for the side slope, so that the initial stress field of the on-site side slope is simulated, and the problem that the initial stress field of the side slope in the previous model test is not in accordance with the reality is solved. The slope excavation unloading is simulated by reserving the excavation surface on the slope model, the operation is simple, and the influence of artificial disturbance on the model test can be avoided. The slope model is vibrated by the blasting vibration mechanism, so that the blasting conditions of different amplitudes and different frequencies of the slope model can be simulated. The stability of the mine slope under the conditions of rainfall factors (different rainfall intensities and rainfall duration), blasting factors (different vibration amplitudes and frequencies) and excavation factors (different graded excavation and slope states) can be researched.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a structural front view of a rock slope excavation model test device under the multi-field coupling effect provided by the embodiment of the application;
fig. 2 is a structural right view of the rock slope excavation model test device under the multi-field coupling effect provided by the embodiment of the application.
(the parts represented by the reference numerals in the drawing are a slope model 1, an excavated block 2, a model box 3, a universal wheel 4, a water discharge pipe 5, a water stop valve 6, a rainfall support 7, a spray nozzle 8, a branch pipeline 9, a water supply pipeline 10, a flow regulating valve 11, a flow meter 12, a hose 13, a water pump 14, a water bucket 15, a vibration motor 16, a vibration rod 17, a support column 18, a vibration base 19, hydraulic equipment 20, a pressure pipe 21, an oil cylinder 22, a fixed support 23, a pressure plate 24, a coordinate grid 25, a resistance miniature soil pressure meter 26 and a resistance strain tester 27 in sequence)
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Referring to the attached drawings 1-2, the rock slope excavation model test device under rainfall seepage and blasting vibration coupling effect provided by the application comprises: the model box body, the rainfall seepage mechanism on the top of the model box body, the blasting vibration mechanism on the right side of the model box body and the horizontal loading mechanism on the left side of the model box body.
A rock slope excavation model test device under the coupling action of rainfall seepage and blasting vibration generally adopts the following steps:
1. a rainfall seepage mechanism is established, the flow of the spray heads 8 under different pressures is adjusted through the flow adjusting valve 11 to simulate rainfall, and the rainfall seepage working conditions of different rainfall intensities and different rainfall duration can be met.
2. A blasting vibration mechanism is established, and a vibrating rod 17 is pushed by a vibrating motor 16 to generate different vibration frequencies and amplitudes, so that blasting vibration working condition simulation of the slope model 1 can be performed.
3. A horizontal loading mechanism is established, horizontal thrust is provided for the slope model 1 through the pressing plate 24, the initial stress field of the on-site slope is simulated really, and the problem that the initial stress field of the slope in the previous model test is not in line with the reality is solved.
4. The side slope model 1 directly takes the excavation block 2 off to simulate the excavation unloading working condition by reserving the excavation surface, and is simple and convenient to operate and not influenced by other working conditions.
5. Rainfall seepage, blasting vibration and other mechanisms are mutually independent and do not interfere with each other, and rock slope model test research under rainfall seepage, blasting vibration or mutual coupling action can be carried out according to test requirements.
6. Transparent toughened glass is arranged on the front surface of the model box body 3, a coordinate grid 25 is arranged on the transparent toughened glass, and in the rainfall landslide test process, the deformation and damage process of the side slope model 1 can be accurately observed by taking the coordinate grid 25 as a reference, and the displacement, rainfall infiltration depth and sliding surface position of the side slope model 1 are recorded.
7. The universal wheels 4 are arranged at the bottom of the model box body 3, so that the model box body is convenient to move.
Assembling mode of test equipment
Referring to the attached figure 1, a side slope model 1 is placed in a model box body 3 and is formed by piling prefabricated blocks with barite powder, quartz sand and iron powder as aggregates. The side slope model 1 contains the excavation block 2, and the excavation block 2 can be taken out at any time in the test process through reserving the excavation surface, so that the excavation unloading of the side slope model 1 is realized.
The model box body 3 is formed by welding high-strength stainless steel, the front surface of the model box body 3 is made of toughened glass, and the peripheral holes are filled with sealant. The front surface of the model box body 3 is also provided with a coordinate grid 25, the deformation and damage process of the side slope model 1 is observed through the coordinate grid 25, and the displacement and the sliding surface position of the side slope model 1 are recorded. A plurality of universal wheels 4 are arranged at the bottom of the model box body 3, and the universal wheels 4 are connected to the bottom of the model box body 3 through bolts. A drain hole is formed in the bottom of the right side of the model box body 3, a drain pipe 5 is connected to the outer side of the drain hole, and a water stop valve 6 is arranged on the drain pipe 5.
The top of the model box body 3 is provided with a rainfall seepage mechanism, and the rainfall seepage mechanism consists of a rainfall support 7, a spray head 8, a branch pipeline 9, a water supply pipeline 10, a flow regulating valve 11, a flow meter 12, a hose 13, a water pump 14 and a water bucket 15. The rainfall support 7 is made of stainless steel and is fixed at the top of the model box body 3 through bolts. A branch pipeline 9 is bound on the rainfall support 7, and a spray head 8 is arranged at the tail end of the branch pipeline 9. The branch pipelines 9 and the water supply pipeline 10 are both PVC pressure-bearing pipes, the end part of the water supply pipeline 10 is divided into a plurality of branch pipelines 9, and all pipeline connections are processed by hot melting. The water supply pipeline 10 is connected to a water pump 14 in a water bucket 15 through a binding hose 13, the water pump 14 can provide power for a rainfall seepage mechanism, and the water bucket 15 is used for storing test water. Wherein the water supply pipeline 10 is also provided with a flow regulating valve 11 and a flow meter 12, which can regulate the rainfall.
The right side of the model box body 3 is provided with a blasting vibration mechanism which comprises a vibration motor 16, a vibration rod 17, a support column 18 and a vibration base 19. Wherein the vibration motor 16 is welded to the vibration base 19 via the strut 18. The support column 18 is of a telescopic design, and blasting vibration simulation at different positions of the slope model 1 can be realized by adjusting the height of the support column 18. The vibration base 19 is fixed to the lower right side of the model case 3, and is formed integrally with the model case 3. The vibrating rod 17 is made of high-strength metal steel, and the right end of the vibrating rod is connected with the vibrating motor 16. The vibration motor 16 provides vibration energy with different frequencies and amplitudes to push the left end of the vibrating rod 17 to directly act on the right side of the slope model 1, so that blasting vibration simulation is realized.
The left side of the model box body 3 is provided with a horizontal loading mechanism, and the horizontal loading mechanism consists of a hydraulic device 20, a pressure pipe 21, an oil cylinder 22, a fixed support 23 and a pressing plate 24. Wherein the hydraulic equipment 20 is arranged at the left lower side of the model box body 3 through a fixed support 23, the oil cylinder 22 is connected with the upper part of the hydraulic equipment 20 through a pressure pipe 21, and the oil cylinder 22 is welded at the left upper part of the model box body 3. The initial stress field of the site slope can be simulated by changing the oil pressure in the pressure pipe 21 through the hydraulic device 20 to adjust the piston in the oil cylinder 22 and control the pressure plate 24 to move leftwards or rightwards.
Referring to fig. 2, the press plate 24 is provided with sealing rings around to prevent water from leaking from the side surfaces of the slope model 1 and the model box 3. The pressure plate 24 is provided with a plurality of resistance-type miniature soil pressure gauges 26, and the resistance strain tester 27 is used for reading the pressure change in the resistance-type miniature soil pressure gauges 26, so that the magnitude of the horizontal initial stress can be conveniently controlled.
When the rock slope excavation model test method under the coupling action of rainfall seepage and blasting vibration is carried out, the steps are as follows:
1. according to the size of the side slope model 1, firstly, preparing aggregates for manufacturing, determining the mixing proportion of the aggregates through a mechanical test, and manufacturing the rock mass of the side slope model 1.
2. Before the side slope model 1 is piled up, indexes such as the grain diameter, the uniformity, the rainfall intensity and the like of raindrops in the rainfall seepage mechanism are calibrated.
3. According to the slope model 1 of experimental design, rock blocks are piled up, gaps among the rock blocks are filled with lubricant, and sensors for monitoring deformation and damage characteristics such as strain, water content and acceleration are buried.
4. After the side slope model 1 is built, according to the pressure value set in the test scheme, the horizontal loading mechanism is started, the side slope model 1 is horizontally loaded through the pressing plate 24, the initial stress field of the side slope is simulated, and the resistance type miniature soil pressure gauge 26 is connected with the resistance strain tester 27 to collect pressure change.
5. According to the design of rainfall, firstly, test water is stored in a water bucket 15, the initial value of a flow meter 12 is recorded, a water pump 14 is started, the rainfall is adjusted and controlled through a flow adjusting valve 11, and the rainfall test is started.
6. And starting the vibration motor 16 to control the vibration frequency and amplitude, adjusting the position of the support column 18 to control the vibration rod 17, and finely controlling the vibration position of the slope model 1.
7. According to the test requirement, the excavation block 2 in the side slope model 1 can be taken out in time, and the simulation of excavation unloading is realized.
8. In the test process, the deformation and damage conditions of the side slope model 1 can be observed and recorded through the coordinate grid 25 in front of the model box body 3, and the deformation data of the side slope model 1 can be collected at any time through the external output port of the embedded sensor.
The above-mentioned embodiments, objects, technical solutions and advantages of the present invention are further described in detail, it should be understood that the above-mentioned embodiments are only illustrative of the present invention and are not intended to limit the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a rock matter side slope excavation model test device under multi-field coupling effect which characterized in that includes: a model box body, a rainfall seepage mechanism, a blasting vibration mechanism and a horizontal loading mechanism, wherein,
the model box body is used for loading a slope model; the top of the model box body is open, and the bottom of the model box body is provided with a drain hole; the model box body is provided with a front side plate made of transparent materials;
the rainfall seepage mechanism is used for generating rainfall on the side slope model so as to simulate rainfall conditions;
the blasting vibration mechanism is used for generating vibration and the vibration acts on the slope model to simulate blasting conditions;
the horizontal loading mechanism is used for applying horizontal load to the side slope model so as to simulate an initial stress field of the rock slope.
2. The rock slope excavation model test device under the multi-field coupling effect of claim 1, wherein the slope model is formed by stacking prefabricated blocks with barite powder, quartz sand and iron powder as aggregates.
3. The rock slope excavation model testing device under the multi-field coupling effect of claim 1, wherein the slope model is provided with excavation blocks, and the excavation blocks can be taken out at any time in the testing process through a reserved excavation surface.
4. The rock slope excavation model test device under the multi-field coupling effect of claim 1,
the drain hole is arranged at the right side of the bottom plate of the model box body and is connected with a drain pipe, and a water stop valve is arranged on the drain pipe;
the front side plate of the model box body is made of toughened glass, and the gaps among the front side plate, the bottom plate, the left side plate and the right side plate of the model box body are filled with sealant;
a coordinate grid is arranged on the front side plate;
and the bottom of the model box body is provided with a plurality of universal wheels.
5. The rock slope excavation model test device under multi-field coupling of claim 1, characterized in that the rainfall seepage mechanism includes: a rainfall support, a plurality of spray heads, branch pipelines, a water supply pipeline, a flow regulating valve, a flow meter, a water pump and a bucket,
the rainfall support is fixed at the top of the model box body;
the plurality of spray heads are fixed on the rainfall support;
the spray head is communicated with the water supply pipeline through the branch pipeline;
the water supply pipeline is connected with the output end of the water pump through a hose;
the input end of the water pump is communicated with the water barrel;
the flow regulating valve and the flow meter are arranged on the water supply pipeline.
6. The rock slope excavation model test device under multi-field coupling of claim 1, wherein the blasting vibration mechanism includes: a vibration base, a plurality of pillars, a vibration motor and a vibration rod,
the vibration base is fixed at the lower part of the right end of the model box body;
the plurality of upright columns are arranged on the vibration base and are of telescopic structures;
the vibration motors are fixed on the plurality of upright posts;
one end of the vibrating rod is fixed at the output end of the vibrating motor, and the other end of the vibrating rod is abutted against the right side of the side slope model, so that the vibration of different frequencies and amplitudes generated by the vibrating motor is transmitted to the side slope model.
7. The rock slope excavation model test device under multi-field coupling of claim 1, wherein the horizontal loading mechanism comprises: a hydraulic device, an oil cylinder and a pressure plate,
the hydraulic equipment is arranged at the lower part of the left end of the model box body through a fixed support;
the oil cylinder is fixed on the upper part of the left end of the model box body; the hydraulic equipment is connected with the oil cylinder through a pressure pipe so as to convey high-pressure oil to the oil cylinder;
the pressing plate is arranged in the model box body and abuts against the left side of the side slope model; and a piston rod of the oil cylinder is connected with the pressing plate so as to drive the pressing plate to apply horizontal compressive stress to the side slope model.
8. The rock slope excavation model test device under the multi-field coupling effect of claim 7,
a sealing ring is arranged between the pressing plate and the model box body;
a plurality of resistance-type miniature soil pressure gauges are arranged on the pressure plate;
the resistance type miniature soil pressure gauge is connected with a resistance strain tester so as to send the horizontal stress value loaded by the pressing plate to the resistance strain tester.
9. A rock slope excavation model test method under the multi-field coupling effect is characterized by being realized by the rock slope excavation model test device under the multi-field coupling effect of any one of claims 1 to 8, and comprising the following steps of:
determining the using amount of aggregate according to the size of the side slope model, determining the mixing proportion of the aggregate through a mechanical test, and manufacturing a rock block by using the aggregate;
piling the side slope model designed by the test through the rock blocks;
according to the pressure value of the experimental design, applying horizontal stress to the side slope model through the horizontal loading mechanism;
according to the rainfall of the experimental design, carrying out rainfall on the side slope model through the rainfall seepage mechanism;
applying vibration to the slope model through the blasting vibration mechanism according to the vibration frequency, the amplitude and the vibration position of the experimental design;
timely taking out the excavation block in the side slope model according to test requirements;
in the test process, the deformation and damage conditions of the side slope model are observed and recorded, and the deformation data of the side slope model are collected.
10. The method for testing the excavation model of the rock slope under the multi-field coupling effect as claimed in claim 9,
before the slope model is built, calibrating the grain diameter, the uniformity and the rainfall intensity of raindrops in the rainfall seepage mechanism;
when the side slope model is built, gaps among the rock blocks are filled with lubricant, and a monitoring strain sensor, a moisture content sensor and an acceleration sensor are embedded;
when horizontal stress is applied to the slope model through the horizontal loading mechanism, the slope model is horizontally loaded through a pressing plate, and stress change of the pressing plate is collected through a resistance type miniature soil pressure meter;
when the rainfall seepage mechanism is used for carrying out rainfall on the side slope model, sufficient test water is stored in a bucket, the initial value of a flow meter is recorded, a water pump is started, the rainfall is adjusted and controlled through a flow regulating valve, and a rainfall test is started;
when the blasting vibration mechanism applies vibration to the side slope model, a vibration motor is started to control vibration frequency and amplitude, and a strut is adjusted to control the position of a vibration rod so as to control the vibration position of the side slope model;
in the test process, the deformation and damage conditions of the side slope model are observed and recorded through a coordinate grid on a front side plate of the model box body, and the deformation data of the side slope model is collected at any time through a buried sensor.
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| CN202011583823.3A CN112684147B (en) | 2020-12-28 | 2020-12-28 | Rock slope excavation model test device and method under multi-field coupling effect |
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| CN114414455A (en) * | 2022-01-17 | 2022-04-29 | 福州大学 | Seepage test device and method for simulating granite binary structure slope |
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