CN109164242B - Landslide simulation test device for flood prevention and emergency drilling - Google Patents
Landslide simulation test device for flood prevention and emergency drilling Download PDFInfo
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- CN109164242B CN109164242B CN201810784249.4A CN201810784249A CN109164242B CN 109164242 B CN109164242 B CN 109164242B CN 201810784249 A CN201810784249 A CN 201810784249A CN 109164242 B CN109164242 B CN 109164242B
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/24—Earth materials
Abstract
The invention discloses a landslide simulation test device for flood prevention and emergency drilling, which comprises a fixed steel plate, a drainage filter pipe, a pressurizing device, a movable steel plate, a slope top support, a slope bottom support, a landslide power device and a recovery tank, wherein the fixed steel plate is fixedly connected with the drainage filter pipe; the fixed steel plate is obliquely and fixedly arranged, and the slope ratio is 1: 1; a plurality of drainage filter pipes are embedded in the fixed steel plate; the movable steel plate can rotate under the driving of the landslide power device; the recovery tank is a conical tank body with a fan-shaped section and comprises an arc surface, an inclined surface and a vertical side baffle surface; the inclined plane and the horizontal plane form an included angle of 49-50 degrees. The invention can realize landslide dangerous situations on site, can carry out emergency drilling of engineering measures such as embankment top load reduction, embankment foot ballast and the like in the landslide generation and development process, has controllable risk in the emergency drilling process, and cannot cause casualty of personnel. Meanwhile, after the drilling is finished, the landslide model of the prototype can be quickly restored, so that the manpower, material resources and financial resources of later maintenance are greatly saved, and the test has repeatability.
Description
Technical Field
The invention relates to the technical field of geotechnical engineering and disaster prevention and reduction model tests, in particular to a landslide simulation test device for flood prevention and emergency drilling.
Background
With the influence of global climate change, extreme weather presents a situation of multiple occurrence and repeated occurrence, in recent years, over-standard flood occurs in Yangtze river drainage basin, Zhujiang river drainage basin and Taihu lake drainage basin, including the second Songhua river drainage basin and the sea river drainage basin in northeast, so that landslides of a plurality of dams are caused, emergency rescue needs to be carried out after the landslides occur, but due to lack of training, certain blindness is often brought during the rescue. Therefore, recognizing the damage of landslide and developing targeted emergency drilling are of great significance for improving landslide emergency success.
The existing indoor landslide test is mainly divided into three categories: frame-type model test, centrifugal model test and geomechanics magnetic force model test, because the model scale is less and the model case is sealed, mainly used for studying landslide mechanism and corresponding anti-skidding engineering measure, can not be used to the drilling of actual combat emergency.
The existing site landslide test mainly utilizes the existing terrain to research the influence of rainfall on the stability of the dam. The large sliding body and the large kinetic energy make the risk after the damage difficult to control, for example, the full-length rainfall landslide test in 1971 in japan caused a serious accident that 15 people die and 11 people are injured. In addition, the later recovery of the test needs great input of manpower and financial resources, and the test has non-repeatability.
Disclosure of Invention
The landslide simulation test device for flood control emergency drilling can realize landslide dangerous situations on site, can carry out emergency drilling of engineering measures such as bank top load reduction, bank foot ballast and the like in the landslide generation and development process, has controllable risks in the emergency drilling process, and cannot cause casualties. Meanwhile, after the drilling is finished, the landslide model of the prototype can be quickly restored, so that the manpower, material resources and financial resources of later maintenance are greatly saved, and the test has repeatability.
In order to solve the technical problems, the invention adopts the technical scheme that:
a landslide simulation test device for flood prevention and emergency drilling comprises a fixed steel plate, a drainage filter pipe, a pressurizing device, a movable steel plate, a slope top support, a slope bottom support, a landslide power device and a recovery tank.
The fixed steel plate is obliquely and fixedly arranged, the slope ratio is 1:1, the top end of the fixed steel plate is in contact with the slope top support, and the slope top support is horizontally and fixedly arranged.
A plurality of drainage filter pipes are embedded in the fixed steel plate, and each drainage filter pipe is connected with a pressurizing device; the pressurizing device is used for providing pressure water for each drainage filter tube and is provided with a valve.
The movable steel plate can rotate under the driving of the landslide power device, the rotating free end of the movable steel plate faces the bottom end direction of the fixed steel plate, and the hinged end of the movable steel plate is hinged with the slope bottom support or the slope bottom foundation; the slope bottom support is horizontally and fixedly arranged on one side of the hinged end of the movable steel plate.
The recovery tank is a conical tank body with a fan-shaped section and comprises an arc surface, an inclined surface and a vertical side baffle surface.
The inclined plane slope sets up, and is located the below of activity steel sheet, and the top of inclined plane is corresponding with the hinged end of activity steel sheet, and the inclined plane is 49~50 with the contained angle that the horizontal plane is.
The bottom end of the cambered surface is connected with the bottom end of the inclined surface, and the top end of the cambered surface is connected with the bottom end of the fixed steel plate; the rotating free end of the movable steel plate can slide along the cambered surface; the vertical side baffle surface is a fan-shaped plate, and the cambered surface is connected with the inclined surface to form a conical groove body with an open top.
When the movable steel plate rotates to a horizontal state, soil is stacked above the slope top support, the fixed steel plate, the movable steel plate and the slope bottom support to form an initial slope, and the outer slope ratio of the initial slope is 1: 2.
When the movable steel plate rotates to the inclined surface, part of soil materials in the initial slope slide into the recovery tank, the slope body after sliding is a sliding slope body, and the outer slope ratio of the sliding slope body is 1: 0.7.
The included angle formed by the inclined plane and the horizontal plane is 49.7 degrees.
The soil material is silt.
The silt has a permeability coefficient ofi×10-4cm/s，i=1、2、3……9。
The pressure device provides pressurized water to the drain filter tube at a pressure below 25 kPa.
The landslide power device comprises a double-layer air bag and an air charging and discharging system, wherein the air charging and discharging system is used for controlling the air charging and discharging of the double-layer air bag;
the double-deck gasbag sets up in the below of activity steel sheet, and the one end anchor of double-deck gasbag is supported or slope base basis on the slope base, and the anchor point is located the pin joint under.
The double-layer air bag comprises an inner-layer air bag and an outer-layer air bag which are stacked; the top of the inner layer air bag is contacted with the bottom of the movable steel plate, and the bottom of the outer layer air bag is contacted with the inclined plane.
The length of the inner layer air bag and the outer layer air bag is 0.95-1 times of the length of the movable steel plate, and the width of the inner layer air bag and the width of the outer layer air bag are 0.8-0.9 times of the width of the movable steel plate.
The length of the inner layer air bag and the outer layer air bag is 0.988 times of the length of the movable steel plate, and the width of the inner layer air bag and the outer layer air bag is 0.848 times of the width of the movable steel plate.
The maximum pressure bearing of the inner layer air bag and the outer layer air bag is 1.0 MPa.
The invention has the following beneficial effects:
1. the landslide form of the invention is arc-shaped sliding along the inside of the silt and composite arc-shaped sliding along the contact surface of the movable steel plate, and the landslide effect is vivid.
2. The landslide power device can control the landslide rate and provide certain reaction time for flood prevention and emergency drilling.
3. The design of the recovery tank and the movable steel plate can be quickly restored to the state before the test after the landslide is finished, and the test can be repeatedly carried out in a short time.
Drawings
Fig. 1 shows a schematic structural diagram of a landslide simulation test device for flood prevention and emergency drilling of the invention before landslide.
Fig. 2 shows a schematic structural diagram of a landslide simulation test device for flood prevention and emergency drilling of the invention after landslide.
Fig. 3 shows a schematic structural diagram of the landslide power plant of the present invention as a double-layer airbag.
Fig. 4 shows a schematic view of the structure of a landslide power plant assuming a single-layer airbag.
Among them are:
10. fixing a steel plate; 11. a drainage filter tube; 20. a pressurizing device; 21. a connecting pipe; 22. a valve; 30. a movable steel plate; 31. a hinge point; 40. soil material; 41. an outer slope; 50. supporting the top of the slope; 60. supporting the slope bottom; 70. a landslide power plant; 71. an inner airbag; 72. an outer bladder; 73. an anchoring point; 80. a recovery tank; 81. a cambered surface; 82. a bevel.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific preferred embodiments.
As shown in fig. 1, the landslide simulation test device for flood prevention and emergency drilling comprises a fixed steel plate 10, a drainage filter pipe 11, a pressurizing device 20, a movable steel plate 30, a slope top support 50, a slope bottom support 60, a landslide power device 70 and a recovery tank 80.
The fixed steel plate is obliquely and fixedly arranged, the slope ratio is 1:1, the top end of the fixed steel plate is in contact with the slope top support, and the slope top support is horizontally and fixedly arranged.
A plurality of drainage filter pipes are embedded in the fixed steel plate, and each drainage filter pipe is connected with a pressurizing device.
The pressurizing device is connected with each drainage filter pipe through a connecting pipe 21 and is used for supplying pressure water to each drainage filter pipe, a valve 22 is arranged on the pressurizing device, and the pressure of the pressure water supplied to the drainage filter pipes by the pressurizing device is preferably lower than 25 kPa.
The movable steel plate can rotate under the driving of the landslide power device, the rotating free end of the movable steel plate faces the bottom end direction of the fixed steel plate, and the hinged end of the movable steel plate is hinged with the slope bottom support or the slope bottom foundation and is provided with a hinged point 31.
The slope bottom support is horizontally and fixedly arranged on one side of the hinged end of the movable steel plate.
The recovery tank is a conical tank body with a fan-shaped section, and comprises an arc surface 81, an inclined surface 82 and a vertical side baffle surface.
The inclined plane slope sets up, and is located the below of activity steel sheet, and the top of inclined plane is corresponding with the hinged end of activity steel sheet, and the contained angle that inclined plane and horizontal plane were is 49~50, preferred 49.7.
The bottom end of the cambered surface is connected with the bottom end of the inclined surface, and the top end of the cambered surface is connected with the bottom end of the fixed steel plate; the rotating free end of the movable steel plate can slide along the cambered surface; the vertical side baffle surface is a fan-shaped plate, and the cambered surface is connected with the inclined surface to form a conical groove body with an open top.
As shown in fig. 1, when the movable steel plate is rotated to a horizontal state, the earth is piled above the top support, the fixed steel plate, the movable steel plate and the bottom support to form an initial slope, and the outer slope ratio of the initial slope is 1: 2.
The soil material is preferably silt, and the permeability coefficient of the silt is preferablyi×10-4cm/s。
As shown in fig. 2, when the movable steel plate rotates to the inclined surface, part of the soil material in the initial slope slides into the recovery tank, the slope body after sliding is a sliding slope body, and the outer slope ratio of the sliding slope body is 1: 0.7.
The external friction coefficient is increased and then reduced along with the increase of the water content of the soil body, namely, an optimal water content exists, the external friction coefficient of the interface is the largest at the moment, and when the soil body is in a saturated state, the external friction coefficient is the smallest. The mode of damage of the model is sliding along the contact surface of the soil body and the steel plate, whether landslide damage occurs or not has a great relation with an external friction angle, and the soil body in the contact part with the steel plate is in a saturated state through a drain hole in the top of the steel plate before a test, so that landslide is easier to realize.
The landslide power plant described above preferably has the following two embodiments.
Example 1: the landslide power device is a jack.
Example 2: the landslide power device, namely the landslide drilling power device, comprises a double-layer air bag and an air inflation and deflation system, wherein the air inflation and deflation system is used for controlling the air inflation and deflation of the double-layer air bag.
The double-deck gasbag sets up in the below of activity steel sheet, and the cambered surface that the activity steel sheet can follow in the accumulator slides, and sliding angle is 0~50, preferably 49.7.
The recovery tank is also provided with an inclined plane for limiting the sliding angle of the movable steel plate, and the movable steel plate is hinged with the slope bottom support or the slope bottom foundation.
One end of the double-layered air bag is anchored to the slope base support or the slope base, and the anchoring point 73 is preferably located directly below the hinge point 31.
As shown in fig. 3, the double-layer airbag includes an inner-layer airbag 71 and an outer-layer airbag 72 which are stacked; the top of the inner layer air bag is contacted with the bottom of the movable steel plate, and the bottom of the outer layer air bag is contacted with the inclined plane.
The length of the inner layer air bag and the outer layer air bag is 0.95-1 times of the length of the movable steel plate, and the width of the inner layer air bag and the width of the outer layer air bag are 0.8-0.9 times of the width of the movable steel plate.
Further, the length of the inner and outer airbags is preferably 0.988 times the length of the movable steel plate, and the width of the inner and outer airbags is preferably 0.848 times the width of the movable steel plate.
In fig. 3, a represents the width of the movable steel plate, b represents the width of the double-layer airbag, and c represents the length of the force-receiving arm of the double-layer airbag.
The side of the movable steel plate contacting the inner air bag and/or the side of the inclined plane contacting the outer air bag are/is preferably covered with a material for reducing the friction coefficient; the material for reducing the friction coefficient is preferably a stainless steel plate.
The maximum pressure bearing capacity of the inner layer air bag and the outer layer air bag is preferably 1.0 MPa.
The design of the double-layer air bag is not the simple superposition of the single-layer air bag, and is obtained through repeated tests and calculation by the applicant.
If the landslide power device is a single-layer airbag, as shown in fig. 4, d in fig. 4 represents the width of the single-layer airbag, and e represents the length of the force receiving arm of the single-layer airbag.
Compared with a single-layer air bag, the invention has the following beneficial effects:
1. the bearing pressure of the air bag is small, and the safe operation coefficient is improved. After the double-bag structure is adopted, the contact surface inosculation performance of the bag body of the double-layer air bag and the movable steel plate is greatly improved, and the lifting stability is also greatly improved. Especially, the actual contact length of the contact in the length direction is increased, so that the capability of the whole movable steel plate for overturning to resist the unbalanced stress formed by the uneven upper covering soil is greatly improved.
The specific analysis is as follows:
as shown in fig. 4, when the single-layer airbag works, the stretching space is too large, the stretching space is not matched with the contact surface of the movable steel plate, and the contact area is too small, when the single-layer airbag jacks up the movable steel plate to a horizontal position, the contact area of the single-layer airbag with the width direction of the movable steel plate is only 1/3, and the single-layer airbag is positioned at the starting point of the force arm; the length direction is an arc formed by the single-layer air bag inflation of the movable steel plate, and the actual contact length of the movable steel plate and the movable steel plate is about 2/3 of the length of the movable steel plate.
According to the calculation, the actual contact area of the single-layer air bag and the movable steel plate is about 2/9, the force arm is short, the stress of the movable steel plate is opposite, and the stress gravity center of the single-layer air bag is deviated to the far end due to the earthing structure, so that the actual bearing pressure of the single-layer air bag is larger and can reach 0.6mpa, the bias voltage is easily formed, the internal pressure of the air bag is larger, and the air bag explodes once the bearing pressure is insufficient, and the consequence is more serious.
As shown in fig. 3, the contact area of the double-layer airbag and the movable steel plate in the width direction occupies about 3/5, the length direction thereof reaches about 4/5, the force arm of the double-layer airbag is located near the center of the movable steel plate, that is, the actual contact area of the double-layer airbag and the movable steel plate is about half of the area of the movable steel plate, so the actual bearing pressure is small, the maximum working pressure of the airbag is only 0.2mpa, the safe operation risk is greatly reduced, and in addition, the maximum bearing capacity of the double-layer airbag is increased and can reach 1.0 mpa.
2. The time for inflating the air bag is shortened. The time is shortened from 25 minutes of a single-layer air bag to 9 minutes in an idle running state; the movable steel plate rises to a balance position (the internal pressure of the air bag is 0.01 MPa), and the positioning pin is locked. Under the state of actual load operation, the time is shortened from 55 minutes of the single-layer air bag to 33 minutes; the movable steel plate is lifted to a set angle, the positioning pin is pulled away, and landslide drilling debugging is started.
3. The pressure in the air bag becomes small. In the no-load running state: the internal pressure of the air bag is reduced to 0.01mpa from 0.1mpa of the single-layer air bag; the movable steel plate is lifted to a balance position, and the positioning pin is locked. Under the actual load running state: the internal pressure of the air bag is reduced to about 0.2mpa from 0.6mpa of the single-layer air bag; the movable steel plate is lifted to a set angle, the positioning pin is pulled away, and landslide drilling debugging is started.
4. The design of the double-layer air bag of the invention improves the sealing and prevents the possibility of local puncture.
5. The friction coefficient reducing material is added and the hinged point is separated from the anchoring point, so that in the double-layer air bag inflation process, particularly, the movable steel plate is restored to the horizontal position after falling into the pit bottom, displacement friction can be formed between the double-layer air bag capsule and the movable steel plate, after the friction coefficient reducing material is added, the action process can be smoother, and the abrasion of the air bag caused by friction is greatly reduced.
A landslide simulation test method for a homogeneous earth dam comprises the following steps.
Step 1, building a landslide simulation test device: the recycling groove with the fan-shaped cross section is piled up and comprises an arc surface and an inclined surface, and the inclination angle of the inclined surface is 49-50 degrees, preferably 49.7 degrees. The fixed steel plate is obliquely and fixedly arranged, the slope ratio is 1:1, the top end of the fixed steel plate is in contact with the slope top support, and the slope top support is horizontally and fixedly arranged; the drainage filter pipe on the fixed steel plate is connected with a pressurizing device; a valve in the pressurizing device is in a closed state; the hinged end of the movable steel plate is hinged with the slope bottom support or the slope bottom foundation, the movable steel plate is in a horizontal locking state under the action of the landslide power device, and the rotating free end of the movable steel plate is in contact with the bottom of the fixed steel plate.
In this step, the landslide power device is preferably a double-layer air bag and an inflation and deflation system, the double-layer air bag is in an inflation state, and the internal pressure of the double-layer air bag is 0.2 mpa.
Step 2, landslide model construction: and stacking soil materials above the slope top support, the fixed steel plate, the movable steel plate and the slope bottom support to form an initial slope, wherein the outer slope ratio of the initial slope is 1: 2.
The soil material is preferably silt with the permeability coefficient ofi×10-4cm/s，i=1、2、3……9. Under non-test conditions, no landslide occurs due to the gradual edge of the slope of the initial slope and sufficient stability under the support of the fixed steel plate and the movable steel plate.
Step 3, soil saturation: the valve of the pressurizing device is opened, and pressure water is provided for the soil through the drainage filter pipe, so that the soil in contact with the fixed steel plate is in a saturated state.
The water-feeding time of the pressurizing device to the soil is controlled to be about 30 minutes, so that the soil 2cm above the fixed steel plate is in a saturated state. The critical ratio drop of the silt is less than 1, and the water pressure is lower than 25kPa in order to prevent the silt from being damaged by infiltration.
Step 4, landslide simulation test: the movable steel plate is released from the horizontal locking state and rotates downwards under the action of the landslide power device until the movable steel plate is parallel to the inclined plane of the recovery groove; in the process of rotating the movable steel plate, partial soil above the movable steel plate slides into the recovery tank along the arc surface of the recovery tank and the upper surface of the movable steel plate to form a landslide; the slope body after slipping is a slipping slope body, and the outer slope ratio of the slipping slope body is 1: 0.7.
The soil body at the lower part of the model moves downwards along with the movable steel plate and slides into the recovery tank after the movable steel plate rotates downwards for a certain angle, and at the moment, the soil body at the upper part of the model is in an empty state and slides into the recovery tank along the sliding direction, so that the landslide phenomenon is generated. In the process of landslide, the soil body can be disintegrated and disintegrated towards the two sides of the sliding direction of the soil body. The disintegration and disintegration degree of the slip are related to factors such as the material, structure and preparation of the slip. Because the reinforced concrete protective walls higher than the designed side slopes are built on the two sides of the movable steel plates, and the downward-sliding soil body slides into the recovery tank, the sliding body is huge, but casualties cannot be caused.
And 4, controlling the landslide speed by controlling the descending speed of the landslide power device, and providing a certain reaction time for flood prevention and emergency drilling.
And 5, landslide flood prevention and emergency drilling.
Step 6, restoring the landslide model: the movable steel plate is upwards rotated to a horizontal state and locked under the action of a landslide power device, so that soil materials in the recovery groove leave the recovery groove to form a recovery initial slope, and the outer side of the recovery initial slope is leveled to ensure that the outer slope ratio of the recovery initial slope is 1: 2.
After the landslide test is completed, the movable steel plate is jacked upwards by a jack, reinforced concrete is built on the wall and the bottom of the recovery tank, the cambered surface just allows the movable steel plate to rotate downwards, and the inclined surface is matched with the maximum downward rotation working condition of the movable steel plate. Thereby ensuring that almost all the gliding soil mass is ejected out of the recovery tank. And after the movable steel plate returns to the horizontal position again, flattening the outer slope slightly, and then performing the next group of landslide experiments.
The invention is particularly suitable for demonstrating landslide of soil slopes, and can be used for landslide disaster training and landslide disaster emergency drilling by flood prevention motor emergency professional teams.
Although the preferred embodiments of the present invention have been described in detail, the present invention is not limited to the details of the embodiments, and various equivalent modifications can be made within the technical spirit of the present invention, and the scope of the present invention is also within the scope of the present invention.
Claims (8)
1. The utility model provides a landslide analogue test device for flood prevention emergency drilling which characterized in that: comprises a fixed steel plate, a drainage filter pipe, a pressurizing device, a movable steel plate, a slope top support, a slope bottom support, a landslide power device and a recovery tank;
the fixed steel plate is obliquely and fixedly arranged, the slope ratio is 1:1, the top end of the fixed steel plate is in contact with the slope top support, and the slope top support is horizontally and fixedly arranged;
a plurality of drainage filter pipes are embedded in the fixed steel plate, and each drainage filter pipe is connected with a pressurizing device; the pressurizing device is used for providing pressure water for each drainage filter tube and is provided with a valve;
the movable steel plate can rotate under the driving of the landslide power device, the rotating free end of the movable steel plate faces the bottom end direction of the fixed steel plate, and the hinged end of the movable steel plate is hinged with the slope bottom support; the slope bottom support is horizontally and fixedly arranged on one side of the hinged end of the movable steel plate;
the recovery tank is a conical tank body with a fan-shaped section and comprises an arc surface, an inclined surface and a vertical side baffle surface;
the inclined plane is obliquely arranged and is positioned below the movable steel plate, the top end of the inclined plane corresponds to the hinged end of the movable steel plate, and the included angle formed by the inclined plane and the horizontal plane is 49-50 degrees;
the bottom end of the cambered surface is connected with the bottom end of the inclined surface, and the top end of the cambered surface is connected with the bottom end of the fixed steel plate; the rotating free end of the movable steel plate can slide along the cambered surface; the vertical side blocking surface is a fan-shaped plate, and the cambered surface is connected with the inclined surface to form a conical groove body with an opening at the top;
when the movable steel plate rotates to a horizontal state, soil materials are stacked above the slope top support, the fixed steel plate, the movable steel plate and the slope bottom support to form an initial slope, and the outer slope ratio of the initial slope is 1: 2;
when the movable steel plate rotates to the inclined surface, part of soil materials in the initial slope slide into the recovery tank, the slope body after sliding is a sliding slope body, and the outer slope ratio of the sliding slope body is 1: 0.7.
2. The landslide simulation test device for flood prevention emergency drilling according to claim 1, wherein: the included angle formed by the inclined plane and the horizontal plane is 49.7 degrees.
3. The landslide simulation test device for flood prevention emergency drilling according to claim 1, wherein: the soil material is silt.
4. The landslide simulation test device for flood prevention emergency drilling according to claim 3, wherein: the silt has a permeability coefficient ofi×10-4cm/s，i=1、2、3……9。
5. The landslide simulation test device for flood prevention emergency drilling according to claim 1, wherein: the pressure device provides pressurized water to the drain filter tube at a pressure below 25 kPa.
6. The landslide simulation test device for flood prevention emergency drilling according to claim 1, wherein: the landslide power device comprises a double-layer air bag and an air charging and discharging system, wherein the air charging and discharging system is used for controlling the air charging and discharging of the double-layer air bag;
the double-layer air bag is arranged below the movable steel plate, one end of the double-layer air bag is anchored on the slope bottom support, and the anchoring point is positioned right below the hinge point;
the double-layer air bag comprises an inner-layer air bag and an outer-layer air bag which are stacked; the top of the inner layer air bag is contacted with the bottom of the movable steel plate, and the bottom of the outer layer air bag is contacted with the inclined plane;
the length of the inner layer air bag and the outer layer air bag is 0.95-1 times of the length of the movable steel plate, and the width of the inner layer air bag and the width of the outer layer air bag are 0.8-0.9 times of the width of the movable steel plate.
7. The landslide simulation test device for flood prevention emergency drilling according to claim 6, wherein: the length of the inner layer air bag and the outer layer air bag is 0.988 times of the length of the movable steel plate, and the width of the inner layer air bag and the outer layer air bag is 0.848 times of the width of the movable steel plate.
8. The landslide simulation test device for flood prevention emergency drilling according to claim 6, wherein: the maximum pressure bearing of the inner layer air bag and the outer layer air bag is 1.0 MPa.
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