CN116430005A - Power transmission tower instability experimental device and experimental method taking landslide geological disaster caused by rainfall as inducement - Google Patents
Power transmission tower instability experimental device and experimental method taking landslide geological disaster caused by rainfall as inducement Download PDFInfo
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Abstract
The invention relates to the technical field of geotechnical engineering, in particular to a power transmission tower instability experimental device taking landslide geological disasters caused by rainfall as inducements. According to the invention, through researching the relation between rainfall, rainfall intensity, rainfall duration and the like and landslide deformation characteristics, the collapse instability mechanism of the power transmission tower structure under the action of landslide geological disasters caused by rainfall is further researched, the trigger mechanism of landslide disasters generated by the side slope under different rainfall states and the trigger mechanism of collapse instability of the power transmission tower structure under the action of landslide disasters are researched, and more theoretical basis is provided for preventing the collapse damage of the power transmission tower structure under the action of landslide geological disasters.
Description
Technical Field
The invention belongs to the technical field of geotechnical engineering, and particularly relates to a power transmission tower instability experimental device and method taking landslide geological disasters caused by rainfall as inducements.
Background
Through years of development, china has built an ultra-long power transportation network which spans a large range. Along the way, the mountain road is inevitably required to pass through a plurality of areas with complex geological topography, such as Chong mountain, mountain canyons and the like, with severe environmental conditions and changeable climates. As a connecting node between a high-voltage transmission line and the ground, the transmission tower is often required to be built at a mountain steep slope in a suburban area so as to reduce the transmission distance and reduce the electric loss and avoid the mutual influence with human activities. The terrain condition improves the possibility of occurrence of geological disasters, once the geological disasters act on a transmission tower to cause power failure, huge pressure and threat are brought to stable operation of a power system and normal supply of power, chain reactions of the disasters are easily caused, and larger-range influence and more serious loss are caused.
According to the summarized report statistics of the national electric network electric science institute, the total tower of the overhead transmission line, which is affected by geological disaster hidden trouble in 2018-2021, is 3920 base. Wherein the flood disasters account for over 40 percent and the landslide is close to 25 percent. While rainfall is the most dominant causative factor, accounting for nearly 70%. The current instability judgment of the foundation of the power transmission tower aiming at the geological disaster caused by rainfall generally analyzes a certain state of a landslide and monitors the landslide on site. Analyzing a certain state of the landslide simplifies the landslide and the geology of the landslide, and cannot accurately reflect the complex process of landslide development to a certain extent; the on-site monitoring method can truly reflect the actual state of the landslide, but most of the time, the landslide has obvious signs or is inserted after sliding, and the monitoring data from inoculation to starting of the landslide is lacking, so that the complete landslide development process cannot be reflected. According to the invention, through researching the relation between rainfall, rainfall intensity, rainfall duration and the like and landslide deformation characteristics, the collapse instability mechanism of the power transmission tower structure under the action of landslide geological disasters caused by rainfall is further researched, the trigger mechanism of landslide disasters generated by the side slope under different rainfall states and the trigger mechanism of collapse instability of the power transmission tower structure under the action of landslide disasters are researched, and more theoretical basis is provided for preventing the collapse damage of the power transmission tower structure under the action of landslide geological disasters.
Disclosure of Invention
The invention aims to provide a power transmission tower foundation instability experimental method for rainfall landslide geological disasters, which overcomes the defects that the complex process of landslide development cannot be accurately reflected, monitoring data of landslide from inoculation to starting stage is lacking, and the complete landslide development process cannot be reflected.
In order to achieve the purpose, the invention provides an experimental device and an experimental method for instability of a power transmission tower, wherein landslide geological disasters caused by rainfall are used as inducements.
The utility model provides an use landslide geological disaster that rainfall causes to be transmission tower unstability experimental apparatus of cause, its characterized in that includes the model case, set up side slope ground body model, transmission tower and basic model, multi-angle rainfall device and monitoring system in the model case, transmission tower and basic model include transmission tower superstructure 5, transmission tower pile foundation 6, remove counter weight 8, fixed counter weight 9, transmission tower pile foundation 6 sets up side slope ground body model top.
Furthermore, in the experimental device for instability of the power transmission tower foundation caused by rainfall landslide geological disaster, the model box 1 is a transparent rectangular box body which is made of organic glass and is open at the upper part, a drain hole 26 is formed in the bottom of the box body 1 at one side, and the drain hole 26 is connected with a water pipe provided with a stop valve.
Further, in the experimental device for the instability of the foundation of the power transmission tower for the rainfall-induced landslide geological disaster, the side slope rock-soil body model comprises a sliding belt 2, a landslide body 3 and a landslide bed 4; the sliding belt 2 comprises a sliding upper crack section 27, a sliding lower crack section 28 and a sliding resistance section 29 between the sliding upper crack section and the sliding lower crack section, a side slope rock-soil body model is placed in a model box, and the sliding body 3 is a main collapse soil body in the sliding test process; the landslide bed 4 does not participate in the landslide process.
Further, in the experimental device for foundation instability of the power transmission tower caused by rainfall landslide geological disaster, the power transmission tower and a foundation model thereof also comprise a bedrock 7 and a suspension rope 30, and the power transmission tower and the foundation model thereof are regulated and constrained at the top end of a side slope rock-soil body model according to the boundary thereof; the upper part of the movable counterweight 8 is provided with a round hole, and the suspension rope 30 suspends the movable counterweight 8 on the fixed counterweight 9 through the round hole. Because the transmission tower is a high-rise structure, when the transmission tower foundation failure mode experiment of rainfall landslide geological disasters is considered, the transmission tower foundation failure mode experiment is limited by experimental conditions, a proportion model is manufactured by adopting transmission tower legs and partial sections, the mass similarity and geometric similarity are considered, and the foundation failure generates an eccentric effect, and two counterweight forms are adopted: the movable counterweight 8 and the fixed counterweight 9, wherein the fixed counterweight calculates according to the weight of the power transmission tower and the equivalent mass, the movable counterweight freely slides under the eccentric action, and the generated additional bending moment value M is
M=mg×e （1）
Wherein, the mass of the m movable counterweights, e, represents the eccentricity generated by the deflection of the movable counterweights, and can be measured.
Further, in the experimental device for destabilizing the foundation of the power transmission tower for the landslide geological disaster caused by rainfall, the multi-angle rainfall device comprises a large-capacity water tank 10, a water supply pipeline 11, a water suction pump 12, a pressurizing device 13, an electronic flow control device 14, a pipeline valve 15, a distributed rotatable rainfall nozzle 16, a rainfall sensor 17, a water collecting tank 18 and a supporting rod 31, wherein the multi-angle rainfall device is used for simulating different rainfall angles, is suspended on the model tank through the supporting rod 31, the water suction pump 12 is connected with the large-capacity water tank 10 through the water supply pipeline 11, a pressurizing device 13 and the electronic flow control device 14 are arranged at the outlet of the water suction pump 12, a pipeline valve 15 is arranged between the electronic flow control device 14 and the distributed rotatable rainfall nozzle 16, the change of rainfall forms can be realized through the pressurizing device 13, the adjustment of flow and flow velocity of the distributed rotatable rainfall nozzle 16 can be realized through the electronic flow control device 14, the simulation of the foundation of the power transmission tower for the landslide geological disaster is realized under different rainfall angles and rainfall intensities, the water collecting tank 18 is connected with the model tank 1 through glass cement, and the drain hole 26 and drain pipe 18 after the rainfall enters the model; the rain sensor 17 is buried in the landslide body 3 from top to bottom.
Further, in the experimental device for instability of the power transmission tower foundation of the rainfall landslide geological disaster, the monitoring system comprises a slope monitoring system and power transmission tower foundation monitoring, and the slope monitoring system comprises a soil pore water pressure sensor 19, a soil water content sensor 20, an inclinometer 21 and a displacement meter 22; the power transmission tower foundation monitoring comprises a foundation displacement sensor 23 and an inclination angle sensor 24. The slope monitoring system can analyze the rainfall triggering landslide condition in real time, the soil pore water pressure sensor 19, the soil water content sensor 20 and the displacement meter 22 are buried in the landslide body 3 from top to bottom, and the inclinometer 21 is buried in the landslide bed 4. The power transmission tower foundation monitoring can analyze the instability condition of the power transmission tower caused by rainfall triggering landslide in real time, and the foundation displacement sensor 23 and the inclination sensor 24 are respectively fixed on the power transmission tower pile foundation 6. Each sensor can collect and record monitored data on the computer in real time by connecting the data collector to the computer.
Furthermore, in the experimental device for foundation instability of the power transmission tower for rainfall-induced landslide geological disaster, the sliding belt 2 is arranged in an arc shape or a straight line shape, the thickness is set to be 1/5-1/10 of the height of the slope model, according to the theory of the performance similarity ratio of the sliding belt, the cohesive force of similar materials of the sliding belt is almost 0, and the internal friction angle of the sliding belt is almost identical with the internal friction angle of the original sliding belt soil. Therefore, the sliding belt 2 is made of double-layer colored plastic cloth and assisted by sand of about 1 cm, and the material can simulate the water permeability of the sliding belt and the weaker shear strength of the sliding belt, and accords with the basic physical and mechanical properties of the sliding belt. The landslide body 3 is formed by stacking shallow dry soil on the earth surface in a natural state, and the porosity of the shallow dry soil on the earth surface is larger, so that rainwater is easier to infiltrate, and the landslide environment can be better simulated. The landslide bed 4 is stable in bedrock, masonry is adopted, cement soil with a certain thickness is used for filling and plastering, and the weathered rock mass of the landslide bed in an actual landslide field is simulated.
Furthermore, in the experimental device for instability of the power transmission tower foundation of the rainfall landslide geological disaster, the experimental device further comprises a plurality of high-resolution cameras 25, and each high-resolution camera 25 is fixedly arranged outside the model box through a triangular bracket. The high-resolution camera 25 is arranged outside the model box and is arranged 1 opposite to the slope rock-soil body model, and is opposite to one of two sides of the slope rock-soil body model, so that the whole process video and tracking observation are carried out on the soil body change of the slope and the deformation of the power transmission tower.
A power transmission tower foundation instability experimental method for rainfall landslide geological disasters comprises the following steps:
(1) Manufacturing a power transmission tower and a basic model thereof according to a similarity theory;
(2) According to the size of the power transmission tower and the basic model thereof and the size of the influence range thereof, the size of the model box 1 required by the experiment is designed;
(3) Building Bian Poyan soil mass models by using rock-soil mass materials required by experiments according to the properties of the sliding belt 2, the sliding mass 3 and the sliding bed 4 in a model box;
(4) The model box 1 is provided with a multi-angle rainfall device and a monitoring and measuring system: the multi-angle rainfall device simulates a rainfall environment, and a soil pore water pressure sensor 19, a soil water content sensor 20, an inclinometer 21 and a displacement meter 22 are arranged at reasonable positions of a side slope foundation; a displacement sensor 23 and an inclination sensor 24 are arranged on the foundation of the power transmission tower; after the installation is completed, the coupling model of the side slope rock-soil body and the power transmission tower structure is naturally solidified for three days, each sensor is connected to a corresponding reading instrument, and the experimental data of the sensors are recorded in real time; a high resolution camera 25 is arranged outside the mold box;
(5) The large-capacity water tank is filled with water at the beginning of the experiment, the water quantity of the water tank is ensured to be sufficient in the experiment process, the spraying mode of a rainfall nozzle is controlled through the pressurizing device 13, and the water pump 12 and the electronic flow control device 14 set corresponding parameters according to the rainfall intensity of the required simulated actual engineering;
(6) Controlling rainfall time until landslide is generated, observing deformation of the slope and the foundation of the power transmission tower, then continuing to simulate rainfall until the foundation of the power transmission tower fails, and closing the water pipe valve 15;
(7) And carrying out overall process tracking observation on the slope soil body displacement change and the power transmission tower structure form change through three cameras 25, recording sensor data in real time, and carrying out data processing analysis.
Compared with the prior art, the invention has the following beneficial effects:
1. the experimental device for the instability of the power transmission tower, which takes the landslide geological disaster caused by rainfall as the cause, can monitor the development process of deformation of the side slope and the power transmission tower foundation in real time, grasp the monitoring data of the landslide from inoculation to starting, further play a role in preventing the instability of the power transmission tower foundation caused by the landslide geological disaster caused by rainfall.
2. The experimental device for the instability of the power transmission tower, which takes landslide geological disasters caused by rainfall as the inducement, can test the relation between landslide occurrence, the collapse of the power transmission tower, rainfall and rainfall time by adjusting the flow, the flow speed and the spray angle of the rotatable rainfall spray head, and is beneficial to clearing the failure mode and the failure mechanism of the power transmission tower under the landslide geological disasters.
Drawings
FIG. 1 is a schematic structural view of a slope rock-soil body model of the present invention.
Fig. 2 is a schematic structural diagram of the multi-angle rainfall device of the present invention.
Fig. 3 is a schematic diagram of the coupling model of the side slope rock-soil body and the power transmission tower and the foundation structure thereof.
FIG. 4 is a schematic diagram of the overall structure of the test device of the present invention.
Wherein, the reference sign is 1: box, 2: slip belt, 3: landslide body, 4: landslide bed, 5: power transmission tower superstructure, 6: pile foundation of power transmission tower, 7: bedrock, 8: moving the counterweight, 9: fixing a counterweight, 10: high capacity water tank, 11: water supply pipe, 12: suction pump, 13: pressurizing device, 14: electronic flow control device, 15: pipeline valve, 16: distributed rotatable rainfall shower nozzle, 17: rain sensor, 18: water collection tank, 19: soil pore water pressure sensor, 20: soil moisture sensor, 21: inclinometer, 22: displacement meter, 23: basic displacement sensor, 24: inclination sensor, 25: high resolution camera, 26: drain hole, 27: upper fracture section, 28: lower fracture section, 29: slide-resistant section, 30: suspension string, 31: and (5) supporting the rod.
Description of the embodiments
The following detailed description of specific embodiments of the invention is, but it should be understood that the invention is not limited to specific embodiments.
Examples
The utility model provides an use landslide geological disaster that rainfall causes to be transmission tower unstability experimental apparatus of cause, its structure schematic diagram is shown in fig. 1~ 4, including the model box, side slope ground body model, transmission tower and basic model, multi-angle rainfall device and monitoring system, still include a plurality of high resolution cameras 25, side slope ground body model, transmission tower and basic model, multi-angle rainfall device and monitoring system set up in the model box, high resolution cameras 25 set up outside the model box.
The power transmission tower and the foundation model thereof comprise a power transmission tower upper structure 5, a power transmission tower pile foundation 6, a movable counterweight 8, a fixed counterweight 9, bedrock 7 and a suspension rope 30, wherein the power transmission tower pile foundation 6 is provided with a slope rock-soil body model top, a round hole is formed in the upper part of the movable counterweight 8, and the movable counterweight 8 is suspended on the fixed counterweight 9 through the round hole by the suspension rope 30.
The model box is a transparent rectangular box body which is made of organic glass and is open at the upper part, a drain hole 26 is formed in the bottom of one side box body 1, and the drain hole 26 is connected with a water pipe provided with a stop valve.
The side slope rock-soil body model comprises a sliding belt 2, a landslide body 3 and a landslide bed 4; the slip belt 2 includes a slip upper fracture section 27, a lower fracture section 28 and a slip blocking section 29 therebetween.
The multi-angle rainfall device comprises a large-capacity water tank 10, a water supply pipeline 11, a water suction pump 12, a pressurizing device 13, an electronic flow control device 14, a pipeline valve 15, a distributed rotatable rainfall spray head 18, a rainfall sensor 17, a water collecting tank 18 and a supporting rod 31.
The monitoring system comprises a slope monitoring system and a power transmission tower foundation monitoring system, wherein the slope monitoring system comprises a soil pore water pressure sensor 19, a soil water content sensor 20, an inclinometer 21 and a displacement meter 22; the soil pore water pressure sensor 19 is embedded in the landslide bed 4, and the soil water content sensor 20, the inclinometer 21 and the displacement meter 22 are embedded in the landslide body 3; the power transmission tower foundation monitoring comprises a foundation displacement sensor 23 and an inclination angle sensor 24, wherein the foundation displacement sensor 23 and the inclination angle sensor 24 are fixed on the power transmission tower pile foundation 6.
The existing power transmission tower built at the mountain steep slope of the suburban area with little human smoke is used for knowing the rainfall condition of the area from the local weather bureau, and the simulation operation flow is as follows by adopting the power transmission tower foundation instability experimental device for rainfall landslide geological disaster provided by the invention:
(1) According to the similarity theory, manufacturing a power transmission tower and a basic model thereof: according to the similarity relation of experimental models
Wherein S is L S is the geometric similarity ratio E S is the similar ratio of elastic modulus a For the acceleration similarity ratio, S p Is equivalent density similarity ratio.
Considering mass similarity and geometric similarity and basic failure to generate an eccentric effect, adopting two counterweight forms to obtain a power transmission tower and a basic model thereof, and regulating and restraining the power transmission tower and the basic model thereof at the top end of a side slope rock-soil body model according to the boundary thereof; the upper structure 5 of the power transmission tower is positioned on the upper part of the pile foundation 6 of the power transmission tower, the fixed counterweight 9 is fixedly arranged on the top of the upper structure 5 of the power transmission tower, the movable counterweight 8 can freely slide on the suspension rope 30, when the power transmission tower tilts, the movable counterweight freely slides under the eccentric action, and the generated additional bending moment value M is
M=mg×e （1）
Wherein, the mass of the m movable counterweights, e, represents the eccentricity generated by the deflection of the movable counterweights, and can be measured.
And obtaining the size of the model box required by the experiment according to the size of the power transmission tower and the basic model thereof and the size of the influence range thereof.
(3) Building Bian Poyan soil body models by using rock-soil body materials required by experiments in a model box, wherein a side slope rock-soil body model adopts a manual building method, and the sliding belt 2 is formed by adopting double-layer colored plastic cloth and assisting with sand of about 1 cm; the landslide body 3 is formed by piling up shallow dry soil on the earth surface in a natural state; the landslide bed 4 can be built by adopting bricks and stones, the landslide body 3 is a main collapsed soil body in the landslide test process, and the landslide bed 4 does not participate in the landslide process.
(4) Set up multi-angle rainfall device and monitoring system in model case 1: the multi-angle rainfall device simulates a rainfall environment, the change of a rainfall form can be realized through the pressurizing device 13, the adjustment of the flow and the flow velocity of the distributed rotatable rainfall spray head 16 can be realized through the electronic flow control device 14, and the failure simulation of landslide geological disasters to the transmission tower foundation can be realized under different rainfall angles and rainfall intensities; the monitoring system comprises a slope monitoring system and a power transmission tower foundation monitoring system, wherein the slope monitoring system can analyze rainfall triggering landslide conditions in real time, and the power transmission tower foundation monitoring system can analyze power transmission tower instability conditions caused by rainfall triggering landslide in real time; after the installation is finished, the side slope rock-soil body and the power transmission tower structure coupling model are naturally solidified for three days, all sensors are connected to corresponding reading instruments, sensor experimental data are recorded in real time, and all sensors can collect and record monitored data on a computer in real time by connecting a data collector to the computer; the high-resolution camera 25 is arranged outside the model box and is arranged 1 opposite to the slope rock-soil body model, and is opposite to one of two sides of the slope rock-soil body model, so that the whole process video recording and tracking observation are carried out on the soil body change of the slope.
(5) The large-capacity water tank is filled with water at the beginning of the experiment, so that the water quantity of the water tank is sufficient in the experiment process, the spraying mode of the rainfall spray head is controlled through the pressurizing device 13, and the actual rainfall intensity of the area where the water pump 12 and the electronic flow control device 14 are arranged is provided with the flow rate, the flow velocity and the spray head angle of the rainfall spray head;
(6) Controlling rainfall time until landslide is generated, observing deformation of the slope and the foundation of the power transmission tower, then continuing to simulate rainfall until the foundation of the power transmission tower fails, and closing the water pipe valve 15;
(7) And carrying out overall process tracking observation on the slope soil body displacement change and the power transmission tower structure form change through three cameras 25, recording sensor data in real time, and carrying out data processing analysis.
In summary, the invention tracks and observes the whole process of the change of the slope soil displacement and the change of the structure form of the power transmission tower through the three cameras, can master the related data from the beginning of the displacement to the collapse of the slope soil and the power transmission tower, and further plays a role in preventing the instability of the power transmission tower foundation due to rainfall landslide geological disasters; the experimental device is provided with the movable counterweight and the fixed counterweight, so that the deviation of the experiment simulating the collapse of the power transmission tower caused by rainfall and the actual collapse of the power transmission tower structure caused by rainfall can be reduced, and the reliability of simulation experiment data is improved; the experimental device can test the relation between landslide and collapse of the power transmission tower, rainfall and rainfall time by adjusting the flow, the flow speed and the spray head angle of the rotatable rainfall spray head, and is beneficial to clearing the failure mode and the failure mechanism of the power transmission tower under the geological disaster of the landslide.
The foregoing descriptions of specific exemplary embodiments of the present invention are presented for purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain the specific principles of the invention and its practical application to thereby enable one skilled in the art to make and utilize the invention in various exemplary embodiments and with various modifications as are suited to the particular use contemplated. It is intended that the scope of the invention be defined by the claims and their equivalents.
Claims (10)
1. The utility model provides an use landslide geological disaster that rainfall causes to be transmission tower unstability experimental apparatus of cause, its characterized in that includes the model case, set up side slope ground body model, transmission tower and basic model, multi-angle rainfall device and monitoring system in the model case, transmission tower and basic model include transmission tower superstructure 5, transmission tower pile foundation 6, remove counter weight 8, fixed counter weight 9, transmission tower pile foundation 6 sets up side slope ground body model top.
2. The experimental device for the instability of the power transmission tower, which is caused by landslide geological disasters caused by rainfall as claimed in claim 1, wherein the model box is a transparent rectangular box body which is made of organic glass and is open at the upper part, a drain hole 26 is arranged at the bottom of one side of the box body 1, and the drain hole 26 is connected with a water pipe provided with a stop valve.
3. The experimental device for power transmission tower instability caused by landslide geological disasters caused by rainfall as claimed in claim 1, wherein the landslide rock-soil body model comprises a sliding belt 2, a landslide body 3 and a landslide bed 4; the slip belt 2 includes a slip upper fracture section 27, a lower fracture section 28 and a slip blocking section 29 therebetween.
4. The experimental device for the instability of the power transmission tower, which is caused by landslide geological disasters caused by rainfall as claimed in claim 1, wherein the power transmission tower and the basic model thereof further comprise a bedrock 7 and a hanging rope 30, a round hole is arranged at the upper part of the movable counterweight 8, and the hanging rope 30 hangs the movable counterweight 8 on the fixed counterweight 9 through the round hole.
5. The experimental device for instability of power transmission tower caused by landslide geological disaster caused by rainfall according to claim 1, wherein the multi-angle rainfall device comprises a large-capacity water tank 10, a water supply pipeline 11, a water suction pump 12, a pressurizing device 13, an electronic flow control device 14, a pipeline valve 15, a distributed rotatable rainfall spray head 18, a rainfall sensor 17, a water collecting tank 18 and a supporting rod 31; the multi-angle rainfall device is hung on the model box through a supporting rod 31, a water suction pump 12 is connected with a large-capacity water tank 10 through a water supply pipeline 11, a pressurizing device 13 and an electronic flow control device 14 are arranged at the outlet of the water suction pump 12, a pipeline valve 15 is arranged between the electronic flow control device 14 and a distributed rotatable rainfall spray head 16, a water collecting tank 18 is connected with the model box 1 through glass cement, and a rainfall sensor 17 is embedded in a landslide body 3.
6. The experimental device for power transmission tower instability caused by landslide geological disaster caused by rainfall according to claim 1, wherein the monitoring system comprises a slope monitoring system and a power transmission tower foundation monitoring system, and the slope monitoring system comprises a soil pore water pressure sensor 19, a soil water content sensor 20, an inclinometer 21 and a displacement meter 22; the soil pore water pressure sensor 19 is embedded in the landslide bed 4, and the soil water content sensor 20, the inclinometer 21 and the displacement meter 22 are embedded in the landslide body 3; the power transmission tower foundation monitoring system comprises a foundation displacement sensor 23 and an inclination angle sensor 24, wherein the foundation displacement sensor 23 and the inclination angle sensor 24 are fixed on a power transmission tower pile foundation 6.
7. The apparatus for testing the instability of a power transmission tower caused by a landslide geological disaster caused by rainfall according to claim 1, further comprising a plurality of high resolution cameras 25, wherein each high resolution camera 25 is fixedly arranged outside the model box through a tripod.
8. The experimental apparatus for power transmission tower destabilization induced by landslide geological disaster caused by rainfall according to claim 3, wherein the slip zone 2 is arc-shaped or linear, and the thickness is set to 1/5-1/10 of the height of the slope model.
9. The experimental facility for power transmission tower destabilization induced by landslide geological disaster caused by rainfall according to claim 3, characterized in that the slip belt 2 is made of double-layer colored plastic cloth and auxiliary sand of about 1 cm; the landslide body 3 is formed by piling up shallow dry soil on the earth surface in a natural state; the landslide bed 4 is built by adopting masonry.
10. The experimental method for the instability of the power transmission tower by taking landslide geological disasters caused by rainfall as inducements is characterized by comprising the following steps of:
(1) Manufacturing a power transmission tower and a basic model thereof according to a similarity theory;
according to the size of the power transmission tower and the basic model thereof and the size of the influence range thereof, the size of the model box 1 required by the experiment is designed;
building Bian Poyan soil mass models by using rock-soil mass materials required by experiments according to the properties of the sliding belt 2, the sliding mass 3 and the sliding bed 4 in a model box;
(4) A multi-angle rainfall device and a monitoring system are arranged in the model box 1; after the installation is completed, the coupling model of the side slope rock-soil body and the power transmission tower structure is naturally solidified for three days, each sensor is connected to a corresponding reading instrument, and the experimental data of the sensors are recorded in real time; a high resolution camera 25 is arranged outside the mold box;
(5) The large-capacity water tank is filled with water at the beginning of the experiment, so that the water quantity of the water tank is sufficient in the experiment process, the spraying mode of a rainfall nozzle is controlled through the pressurizing device 13, and the water pump 12 and the electronic flow control device 14 set corresponding parameters according to the rainfall intensity of the required simulated actual engineering;
(6) Controlling rainfall time until landslide is generated, observing deformation of the slope and the foundation of the power transmission tower, then continuing to simulate rainfall until the foundation of the power transmission tower fails, and closing the water pipe valve 15;
(7) And carrying out overall process tracking observation on the slope soil body displacement change and the power transmission tower structure form change through three cameras 25, recording sensor data in real time, and carrying out data processing analysis.
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| CN202310282086.0A CN116430005A (en) | 2023-03-22 | 2023-03-22 | Power transmission tower instability experimental device and experimental method taking landslide geological disaster caused by rainfall as inducement |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118275654A (en) * | 2024-05-29 | 2024-07-02 | 湖南致力工程科技有限公司 | Collapse geological disaster monitoring equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN118275654A (en) * | 2024-05-29 | 2024-07-02 | 湖南致力工程科技有限公司 | Collapse geological disaster monitoring equipment |
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