CN112684147B - 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
- Publication number
- CN112684147B CN112684147B CN202011583823.3A CN202011583823A CN112684147B CN 112684147 B CN112684147 B CN 112684147B CN 202011583823 A CN202011583823 A CN 202011583823A CN 112684147 B CN112684147 B CN 112684147B
- Authority
- CN
- China
- Prior art keywords
- model
- slope
- vibration
- rainfall
- box body
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000012360 testing method Methods 0.000 title claims abstract description 62
- 238000009412 basement excavation Methods 0.000 title claims abstract description 45
- 239000011435 rock Substances 0.000 title claims abstract description 37
- 230000001808 coupling effect Effects 0.000 title claims abstract description 12
- 238000000034 method Methods 0.000 title claims description 19
- 230000007246 mechanism Effects 0.000 claims abstract description 56
- 238000005422 blasting Methods 0.000 claims abstract description 39
- 230000009471 action Effects 0.000 claims abstract description 13
- 230000008878 coupling Effects 0.000 claims abstract description 12
- 238000010168 coupling process Methods 0.000 claims abstract description 12
- 238000005859 coupling reaction Methods 0.000 claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 50
- 238000003825 pressing Methods 0.000 claims description 22
- 230000001105 regulatory effect Effects 0.000 claims description 16
- 230000008569 process Effects 0.000 claims description 13
- 239000007921 spray Substances 0.000 claims description 10
- 239000002689 soil Substances 0.000 claims description 9
- 238000013461 design Methods 0.000 claims description 6
- 238000012544 monitoring process Methods 0.000 claims description 5
- 230000008859 change Effects 0.000 claims description 4
- 230000008595 infiltration Effects 0.000 claims description 4
- 238000001764 infiltration Methods 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 239000005341 toughened glass Substances 0.000 claims description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 3
- 239000006004 Quartz sand Substances 0.000 claims description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
- 230000001133 acceleration Effects 0.000 claims description 3
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 claims description 3
- 238000013401 experimental design Methods 0.000 claims description 3
- 239000000314 lubricant Substances 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 239000002245 particle Substances 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
- 239000012780 transparent material Substances 0.000 claims description 2
- 238000011160 research Methods 0.000 abstract description 10
- 238000004088 simulation Methods 0.000 description 6
- 238000005065 mining Methods 0.000 description 5
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000011081 inoculation Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention relates to a rock slope excavation model test device under the action of multi-field coupling, which comprises: the device comprises 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 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 side 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 the coupling effects of rainfall, blasting vibration and excavation unloading, the external influence factors of slope deformation damage are comprehensively considered, and the reliability of mine slope stability research is effectively improved.
Description
Technical Field
The invention relates to the technical field of slope model experimental equipment, in particular to a rock slope excavation model test device and method under the action of multi-field coupling.
Background
Landslide disasters often occur in surface mining engineering, and unstable damage of mine slopes can not only influence normal operation of mining work, but also cause a large amount of casualties and economic losses. Therefore, landslide disaster mechanism, control, monitoring and early warning in surface mining are always important research points in the field of mining slope engineering. The combined action of one or more factors such as rainfall seepage, blasting vibration and excavation unloading is a main reason for inducing deformation and damage of the mine slope, so that the mine slope instability law under the multi-field coupling action such as rainfall seepage and blasting vibration is studied in depth, and the method has important theoretical significance and engineering practical value for efficient mining of the mine.
The slope model test can visually simulate the whole process of stress, deformation and damage of the slope, reveals the influence of controllable influence factors on the landslide disaster-induced inoculation evolution process, is always popular with students in the field of the slope, and obtains a great amount of meaningful research results, but still has some defects. The current model test device has the following problems: firstly, the function of a slope model test device is single, only the stability influence of a rock slope under the single factor effects of rainfall seepage, blasting vibration and the like is considered, and the research of the stability influence of multiple factors on the slope cannot be realized; secondly, considering that the initial state of the slope is incomplete, and neglecting the influence of an initial stress field; thirdly, the side slope model is greatly interfered by equipment and human factors under the multi-factor coupling effect, and a certain deviation exists between a test result and a real situation.
Therefore, the simulation of the slope model test under the combined action of factors such as rainfall seepage, blasting vibration, excavation unloading and the like is considered, and the simulation is difficult, and obstacles are generated for the subsequent research of 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 action of multi-field coupling, which solves or partially solves 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 coupling effect of rainfall, blasting vibration and excavation unloading, the external influence factors of slope deformation damage are comprehensively considered, and the reliability of mine slope stability research is effectively improved.
The application provides a rock slope excavation model test device under the action of multi-field coupling, which comprises the following components: the 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 slope model so as to simulate rainfall conditions;
the blasting vibration mechanism is used for generating vibration and acting on the side slope model to simulate blasting conditions;
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.
Preferably, the slope model is formed by piling up precast blocks with barite powder, quartz sand and iron powder as aggregate.
Preferably, the slope model is provided with an excavation block, and the excavation block can be taken out at any time in the test process by 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 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;
the front side plate is provided with a coordinate grid;
the bottom of the model box body is provided with a plurality of universal wheels.
Preferably, the rainfall infiltration mechanism comprises: a rainfall bracket, a plurality of spray heads, a branch pipeline, a water supply pipeline, a flow regulating valve, a flow meter, a water pump and a water bucket,
The rainfall bracket is fixed at the top of the model box body;
A plurality of spray heads are fixed on the rainfall bracket;
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 bucket;
The flow regulating valve and the flow meter are arranged on the water supply pipeline.
Preferably, the blasting vibration mechanism includes: a vibration base, a plurality of struts, 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 upright posts are arranged on the vibration base and are of a telescopic structure;
The vibrating motor is fixed on the 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 abuts against the right side of the slope model, so that vibration with different frequencies and amplitudes generated by the vibrating motor is transmitted to the slope model.
Preferably, the horizontal loading mechanism includes: hydraulic equipment, an oil cylinder and a pressing 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 at 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 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 slope model.
Preferably, 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 pressing plate;
The resistance type miniature soil pressure gauge is connected with a resistance strain tester 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 action of multi-field coupling, which is realized by the rock slope excavation model test device under the action of multi-field coupling, and comprises the following steps:
determining the use amount of aggregate according to the size of the slope model, determining the mixing ratio of the aggregate through a mechanical test, and manufacturing rock by using the aggregate;
The slope model designed through the rock stacking test is obtained;
applying horizontal stress to the slope model through the horizontal loading mechanism according to the pressure value of the test design;
According to the rainfall of the experimental design, rainfall is carried out on the slope model through the rainfall seepage mechanism;
Applying vibration to the slope model through the blasting vibration mechanism according to the vibration frequency, the vibration amplitude and the vibration position of the test design;
timely taking out the excavated blocks in the slope model according to test requirements;
in the test process, the deformation and damage conditions of the slope model are observed and recorded, and deformation data of the slope model are collected.
Preferably, before the slope model is piled up, the particle size, uniformity and rainfall intensity of the raindrops in the rainfall seepage mechanism are calibrated;
when the slope model is piled up, gaps among the rock blocks are filled with lubricant, and a monitoring strain sensor, a water content sensor and an acceleration sensor are buried;
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 the stress change of the pressing plate is collected through a resistance type miniature soil pressure gauge;
when the rainfall seepage mechanism is used for rainfall on the slope model, firstly, enough test water is reserved in a water bucket, the initial value of a flow meter is recorded, a water pump is started, the rainfall is regulated and controlled through a flow regulating valve, and a rainfall test is started;
When vibration is applied to the slope model through the blasting vibration mechanism, a vibration motor is started, the vibration frequency and the vibration amplitude are controlled, the position of a vibration rod is controlled by adjusting a support column, and then the vibration position of the slope model is controlled;
In the test process, deformation and damage conditions of the side slope model are observed and recorded through a coordinate grid on the front side plate of the model box body, and deformation data of the side slope model are acquired at any time through a buried sensor.
One or more technical solutions provided in the embodiments of the present application at least have 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 durations), blasting vibration factors (amplitude and frequency) and excavation unloading factors (different grading excavation and Bian Popo states), and revealing the instability mechanism of rock slope excavation under the coupling effect 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 past model test is not in line with reality is solved. The slope excavation unloading is simulated by reserving the excavation surface on the slope model, so that the operation is simple, and the influence of artificial disturbance on a model test can be avoided. The side slope model is vibrated by the blasting vibration mechanism, so that blasting working conditions with different amplitudes and different frequencies of the side slope model can be simulated. The mine slope stability conditions under the conditions of rainfall factors (different rainfall intensities, rainfall duration), blasting factors (different vibration amplitudes and frequencies) and excavation factors (different grading excavation and Bian Popo states) can be studied.
Drawings
In order to more clearly illustrate the embodiments of the application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a front view of a structure of a rock slope excavation model test device under the action of multi-field coupling provided by an embodiment of the application;
fig. 2 is a right side view of a structure of a rock slope excavation model test device under the action of multi-field coupling provided by the embodiment of the application.
( The components represented by the reference numerals in the drawings are in turn: 1, a side slope model; 2, excavating a block; 3, model box body; 4 universal wheels; 5, draining pipe; 6, a water stop valve; 7, a rainfall bracket; 8, spray heads; 9 branch pipelines; 10 water supply lines; 11 flow regulating valve; 12 flow meters; 13 a hose; 14, a water pump; 15 water barrels; a 16 vibration motor; 17 a vibrating bar; 18 struts; 19 vibrating the base; 20 hydraulic equipment; a 21 pressure tube; 22 oil cylinders; 23 fixing the support; a 24-press plate; a 25 coordinate grid; 26 resistance type miniature earth pressure gauge; 27 resistance strain tester )
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
Referring to fig. 1-2, the rock slope excavation model test device under the coupling effect of rainfall seepage and blasting vibration provided by the application comprises: the device comprises a model box body, a rainfall infiltration mechanism at the top of the model box body, a blasting vibration mechanism at the right side of the model box body and a horizontal loading mechanism at the left side of the model box body.
The general implementation mode of the rock slope excavation model test device under the coupling effect of rainfall seepage and blasting vibration comprises the following steps:
1. the rainfall seepage mechanism is established, the flow of the spray head 8 under different pressures is regulated by the flow regulating valve 11 to simulate rainfall, and the rainfall seepage working conditions of different rainfall intensities and different rainfall holding times can be met.
2. The blasting vibration mechanism is established, the vibration motor 16 pushes the vibration rod 17 to generate different vibration frequencies and amplitudes, and the blasting vibration working condition simulation of the side slope model 1 can be performed.
3. The horizontal loading mechanism is established, the pressing plate 24 provides horizontal thrust for the slope model 1, the initial stress field of the site slope is simulated more truly, and the problem that the initial stress field of the slope does not accord with reality in the prior model test is solved.
4. The slope model 1 directly takes the excavated block 2 out of the simulated excavation unloading working condition by reserving the excavation surface, and is simple and convenient to operate and free from the influence of other working conditions.
5. The mechanisms such as rainfall seepage, blasting vibration and the like are mutually independent and do not interfere with each other, and rock slope model test research under rainfall seepage, blasting vibration or mutual coupling 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 front surface of the model box body, the coordinate grid 25 can be used as a reference in the rainfall landslide test process, the deformation and damage process of the slope model 1 can be accurately observed, and the displacement, the rainfall infiltration depth and the sliding surface position of the slope model 1 are recorded.
7. The universal wheel 4 is arranged at the bottom of the model box body 3, so that the model box is convenient to move.
Assembly mode of test equipment
With reference to fig. 1, a slope model 1 is placed in a model box 3 and is formed by stacking precast blocks with barite powder, quartz sand and iron powder as aggregate. 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 slope model 1 is observed through the coordinate grid 25, and the displacement of the slope model 1 and the position of the sliding surface are recorded. The bottom of the model box body 3 is provided with a plurality of universal wheels 4, and the universal wheels 4 are connected to the bottom of the model box body 3 through bolts. The bottom of the right side of the model box body 3 is provided with a drain hole, the outer side of the drain hole is connected with a drain pipe 5, 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 which consists of a rainfall bracket 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 bracket 7 is made of stainless steel and is fixed on the top of the model box body 3 through bolts. The rainfall bracket 7 is bound with a branch pipeline 9, 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 all PVC pressure-bearing pipes, a plurality of branch pipelines 9 are arranged at the end part of the water supply pipeline 10, and all pipeline connections are subjected to hot melting treatment. 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. The water supply pipeline 10 is also provided with a flow regulating valve 11 and a flow meter 12, and the rainfall can be regulated.
The right side of the model box body 3 is provided with a blasting vibration mechanism, and the blasting vibration mechanism 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 a post 18. The support posts 18 are of a telescopic design, and the simulation of the blasting vibration at different positions of the slope model 1 can be realized by adjusting the heights of the support posts 18. The vibration mount 19 is fixed to the lower right side of the model casing 3, and is formed integrally with the model casing 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, and pushes the left end of the vibration 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 which 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 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 3. The initial stress field of the site slope can be simulated by the hydraulic device 20 changing the oil pressure in the pressure tube 21 to adjust the piston in the cylinder 22, and the control plate 24 moving to the left or right.
Referring to fig. 2, sealing rings are arranged around the pressing plate 24 to prevent the side surfaces of the slope model 1 and the model box 3 from water seepage. The pressure plate 24 is provided with a plurality of resistance micro soil pressure gauges 26, and the resistance strain gauge 27 is used for reading the pressure change in the resistance micro soil pressure gauges 26, so as to control the initial stress of the loading level.
When the rock slope excavation model test method under the coupling effect of rainfall seepage and blasting vibration is carried out, the steps are as follows:
1. According to the size of the slope model 1, firstly, preparing aggregate for manufacturing, and after determining the mixing ratio of the aggregate through a mechanical test, manufacturing the rock of the slope model 1.
2. Before the side slope model 1 is piled up, indexes such as the particle size, uniformity, rainfall intensity and the like of the rain drops 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 damage characteristics such as strain, water content and acceleration are embedded.
4. After the side slope model 1 is piled up, the horizontal loading mechanism is started according to the pressure value set in the test scheme, the side slope model 1 is horizontally loaded through the pressing plate 24, an 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 for collecting pressure change.
5. According to the rainfall of the test design, firstly, test water is reserved in a water bucket 15, the initial value of a flowmeter 12 is recorded, a water pump 14 is started, the rainfall is regulated and controlled through a flow regulating valve 11, and a rainfall test is started.
6. The vibration motor 16 is started to control the vibration frequency and the vibration amplitude, the support column 18 is adjusted to control the position of the vibration rod 17, and the vibration position of the slope model 1 is finely controlled.
7. According to the test requirement, the excavation block 2 in the slope model 1 can be timely taken out, and simulation of excavation unloading is realized.
8. In the test process, deformation and damage conditions of the slope model 1 can be observed and recorded through the coordinate grid 25 in front of the model box body 3, and deformation data of the slope model 1 can be acquired at any time through an external output port of the embedded sensor.
While the foregoing is directed to embodiments of the present invention, other and further details of the invention may be had by the present invention, it should be understood that the foregoing description is merely illustrative of the present invention and that no limitations are intended to the scope of the invention, except insofar as modifications, equivalents, improvements or modifications are within the spirit and principles of the invention.
Claims (4)
1. Rock slope excavation model test device under many field coupling effect, its characterized in that includes: the 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 slope model so as to simulate rainfall conditions;
the blasting vibration mechanism is used for generating vibration and acting on the side slope model to simulate blasting conditions;
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 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 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;
the front side plate is provided with a coordinate grid;
the bottom of the model box body is provided with a plurality of universal wheels;
the rainfall infiltration mechanism comprises: a rainfall bracket, a plurality of spray heads, a branch pipeline, a water supply pipeline, a flow regulating valve, a flow meter, a water pump and a water bucket,
The rainfall bracket is fixed at the top of the model box body;
A plurality of spray heads are fixed on the rainfall bracket;
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 bucket;
The flow regulating valve and the flow meter are arranged on the water supply pipeline;
the blasting vibration mechanism includes: a vibration base, a plurality of struts, 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 support posts are arranged on the vibration base and are of a telescopic structure;
the vibration motor is fixed on a plurality of the struts;
One end of the vibrating rod is fixed at the output end of the vibrating motor, and the other end of the vibrating rod abuts against the right side of the slope model, so that vibration with different frequencies and amplitudes generated by the vibrating motor is transmitted to the slope model;
The horizontal loading mechanism includes: hydraulic equipment, an oil cylinder and a pressing 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 at 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 slope model; 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 slope model;
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 pressing plate;
The resistance type miniature soil pressure gauge is connected with a resistance strain tester to send a horizontal stress value loaded by the pressing plate to the resistance strain tester;
the side slope model is provided with excavation block, through reserving the excavation face can take out at any time in the test process excavation block.
2. The multi-field coupling rock slope excavation model test device according to claim 1, wherein the slope model is formed by stacking precast blocks with barite powder, quartz sand and iron powder as aggregate.
3. The rock slope excavation model test method under the action of multi-field coupling is characterized by comprising the following steps of:
determining the use amount of aggregate according to the size of the slope model, determining the mixing ratio of the aggregate through a mechanical test, and manufacturing rock by using the aggregate;
The slope model designed through the rock stacking test is obtained;
applying horizontal stress to the slope model through the horizontal loading mechanism according to the pressure value of the test design;
According to the rainfall of the experimental design, rainfall is carried out on the slope model through the rainfall seepage mechanism;
Applying vibration to the slope model through the blasting vibration mechanism according to the vibration frequency, the vibration amplitude and the vibration position of the test design;
timely taking out the excavated blocks in the slope model according to test requirements;
in the test process, the deformation and damage conditions of the slope model are observed and recorded, and deformation data of the slope model are collected.
4. A method for testing a rock slope excavation model under the action of multi-field coupling as claimed in claim 3, wherein,
Before the slope model is piled up, calibrating the particle size, uniformity and rainfall intensity of the raindrops in the rainfall seepage mechanism;
when the slope model is piled up, gaps among the rock blocks are filled with lubricant, and a monitoring strain sensor, a water content sensor and an acceleration sensor are buried;
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 the stress change of the pressing plate is collected through a resistance type miniature soil pressure gauge;
when the rainfall seepage mechanism is used for rainfall on the slope model, firstly, enough test water is reserved in a water bucket, the initial value of a flow meter is recorded, a water pump is started, the rainfall is regulated and controlled through a flow regulating valve, and a rainfall test is started;
When vibration is applied to the slope model through the blasting vibration mechanism, a vibration motor is started, the vibration frequency and the vibration amplitude are controlled, the position of a vibration rod is controlled by adjusting a support column, and then the vibration position of the slope model is controlled;
In the test process, deformation and damage conditions of the side slope model are observed and recorded through a coordinate grid on the front side plate of the model box body, and deformation data of the side slope model are acquired at any time through a buried sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011583823.3A CN112684147B (en) | 2020-12-28 | 2020-12-28 | Rock slope excavation model test device and method under multi-field coupling effect |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011583823.3A CN112684147B (en) | 2020-12-28 | 2020-12-28 | Rock slope excavation model test device and method under multi-field coupling effect |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112684147A CN112684147A (en) | 2021-04-20 |
| CN112684147B true CN112684147B (en) | 2024-05-14 |
Family
ID=75454447
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011583823.3A Active CN112684147B (en) | 2020-12-28 | 2020-12-28 | Rock slope excavation model test device and method under multi-field coupling effect |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112684147B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114414455B (en) * | 2022-01-17 | 2023-08-22 | 福州大学 | Seepage test device and method for simulating granite binary structure side slope |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103884831A (en) * | 2014-04-04 | 2014-06-25 | 云南省交通规划设计研究院 | Multifunctional three-dimensional model testing platform for roadbed slope and underground engineering |
| CN108020489A (en) * | 2017-11-17 | 2018-05-11 | 山东大学 | Packed type karst seepage failure Whole Process Simulation pilot system and method |
| CN108331042A (en) * | 2018-03-05 | 2018-07-27 | 武汉科技大学 | A kind of experimental rig and test method of the influence of simulation Blasting Excavation side slope |
| CN112213469A (en) * | 2020-11-04 | 2021-01-12 | 华南农业大学 | Experimental device and method for simulating coupling effect of seismic waves and rainfall to induce landslide |
| CN214669045U (en) * | 2020-12-28 | 2021-11-09 | 武汉科技大学 | Rock slope excavation model test device under multi-field coupling effect |
-
2020
- 2020-12-28 CN CN202011583823.3A patent/CN112684147B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103884831A (en) * | 2014-04-04 | 2014-06-25 | 云南省交通规划设计研究院 | Multifunctional three-dimensional model testing platform for roadbed slope and underground engineering |
| CN108020489A (en) * | 2017-11-17 | 2018-05-11 | 山东大学 | Packed type karst seepage failure Whole Process Simulation pilot system and method |
| CN108331042A (en) * | 2018-03-05 | 2018-07-27 | 武汉科技大学 | A kind of experimental rig and test method of the influence of simulation Blasting Excavation side slope |
| CN112213469A (en) * | 2020-11-04 | 2021-01-12 | 华南农业大学 | Experimental device and method for simulating coupling effect of seismic waves and rainfall to induce landslide |
| CN214669045U (en) * | 2020-12-28 | 2021-11-09 | 武汉科技大学 | Rock slope excavation model test device under multi-field coupling effect |
Non-Patent Citations (2)
| Title |
|---|
| 基于多场耦合数值分析的膨胀土边坡浅层膨胀变形破坏机制研究;丁金华;陈仁朋;童军;龚壁卫;;岩土力学;20150610(第S1期);全文 * |
| 降雨型滑坡现场模拟试验研究;龙万学;吴俊;傅鹤林;;贵州工业大学学报(自然科学版);20080515(第03期);全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112684147A (en) | 2021-04-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108386177B (en) | Real-time monitoring experiment system and method for three-dimensional multilayer multi-well fracturing support crack | |
| CN110296928B (en) | Device and method for simulating visual fracture seepage by using magnetofluid | |
| CN104535728B (en) | Two-dimensional physical simulation testing system for deeply-buried tunnel water bursting hazard and testing method thereof | |
| CN103995097B (en) | A kind of test method and device of simulating jacking construction initiation stratum deformation | |
| CN107807051A (en) | Simulate the experimental rig and test method of Blasting Excavation off-load under three-dimensional loading environment | |
| CN110346216B (en) | Coal rock triaxial loading test device and method under condition of simulated tunneling disturbance | |
| CN109882183B (en) | Water-rich loose fractured coal rock mass grouting consolidation experimental device and effect evaluation method | |
| CN103398902B (en) | Test apparatus for flexible loading and instantaneously unloading of high geostress, and test method | |
| CN100390357C (en) | Analogue experiment stand for interreaction of tunnel structure, surrounding rock and underground water | |
| CN111707805B (en) | Model test system for simulating excavation of tunnel rock-like pile body and operation method | |
| CN113189302B (en) | System and method for testing dynamic disasters caused by water and mud burst during crossing of movable fracture of deep buried tunnel | |
| CN111811856B (en) | Coal pillar dam body accumulated damage evolution comprehensive experiment device and experiment method thereof | |
| CN104533470A (en) | Standing type mechanical loading device for three-ring prototype irregular shield segment | |
| CN106644836A (en) | Visual fracturing grouting model testing device and testing method thereof | |
| CN106872334A (en) | A kind of method of the prominent mud Excavation simulation device of gushing water and the prominent mud disaster of simulation gushing water | |
| CN113030277B (en) | System and method for testing permeability damage and grouting injectability of surrounding rock of water-rich sand layer tunnel | |
| CN115839822B (en) | System and method for testing process of submerged and pumping drainage of mountain tunnel induced by heavy rainfall | |
| CN104034592A (en) | Rock triaxial compression test method suitable for sample preparation through drilling | |
| CN111006952A (en) | Experimental test device and grouting method for reinforcing fractured rock sample through high-pressure permeation grouting | |
| CN112684147B (en) | Rock slope excavation model test device and method under multi-field coupling effect | |
| CN204359770U (en) | Deep tunnel water bursting disaster two-dimensional physical simulation experiment system | |
| CN205712215U (en) | The excavation of foundation pit model test apparatus of simulation artesian head lifting | |
| CN214669045U (en) | Rock slope excavation model test device under multi-field coupling effect | |
| CN107179391A (en) | A kind of experimental rig that Under-cross tunnel shallow layer grouting is buried for an ultra shallow | |
| CN111443013A (en) | Loose rock-soil layer grouting test device and method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |