CN217630006U - Movable rapid back pressure device for instability of rock and soil mass - Google Patents
Movable rapid back pressure device for instability of rock and soil mass Download PDFInfo
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- CN217630006U CN217630006U CN202221446802.1U CN202221446802U CN217630006U CN 217630006 U CN217630006 U CN 217630006U CN 202221446802 U CN202221446802 U CN 202221446802U CN 217630006 U CN217630006 U CN 217630006U
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Abstract
The utility model provides a movable rapid back pressure device for instability of rock-soil mass, which comprises a walking mechanism and a back pressure mechanism; the walking mechanism drives the back pressure mechanism to move; the back pressure mechanism comprises a vertical baffle, a top baffle, a first telescopic piece, a back pressure water bag and a water supply structure; one end of the vertical baffle is arranged on the travelling mechanism; the top baffle is hinged with the other end of the vertical baffle through a connecting rod; the back pressure water bag is arranged on the top baffle and is positioned on one side of the top baffle close to the rock-soil body; two ends of the first telescopic piece are sequentially hinged with the vertical baffle and the top baffle, and the first telescopic piece can drive the top baffle to rotate around the hinged position of the top baffle and the vertical baffle, so that the back pressure water bag moves above the unstable rock-soil body; the water supply mechanism is arranged in the running mechanism and can charge and discharge water for the counter-pressure water bag. The opening and closing of the top baffle and the gravity of the back pressure water bag exert downward acting force on unstable rock soil simultaneously, so that the rock soil body is compacted, and the stability of the slope is improved.
Description
Technical Field
The utility model relates to a technical field is equipped to the soil body back pressure, concretely relates to quick back pressure device of movable for ground body unstability.
Background
In tunnel construction, construction such as blasting, excavation and the like disturbs surrounding rocks, particularly in a deeply buried water-rich tunnel, the surrounding rocks have low strength and develop underground water, the stability of the surrounding rocks is reduced under the construction disturbance, a large amount of silt easily gushes out from a tunnel face, the cross section of the tunnel is blocked, property loss is caused, the safety of construction personnel is threatened, and the construction period is delayed; in addition, various slopes formed naturally or artificially are susceptible to instability of slope rock soil due to factors such as rainfall, support failure and slope toe excavation. At present, although more temporary or permanent engineering treatment measures such as grouting, anchor rod setting and the like are formed at home and abroad aiming at the disasters of tunnel mud burst and side slope unstable soil body slip, the construction cost is long, and the sudden mud burst and the soil body slip cannot be treated quickly and effectively, so that the great engineering disasters are caused.
When the site operation is carried out, if the premonition of mud gushing, slope instability and the like is observed, external force can be timely applied to the rock-soil body to carry out back pressure so as to inhibit the mobility of the rock-soil body or the development of internal cracks, the influence range of disasters can be effectively reduced, and the personnel safety is ensured.
SUMMERY OF THE UTILITY MODEL
To the above-mentioned problem that prior art exists, the utility model discloses the main technical problem who solves is: when the signs of mud gushing, slope instability and the like are observed, if the rapid and effective treatment cannot be carried out, great engineering disasters can be caused.
In order to solve the technical problem, the utility model adopts the following technical scheme: a movable rapid back pressure device for destabilization of rock and soil mass, comprising: a traveling mechanism and a back pressure mechanism; the walking mechanism drives the back pressure mechanism to move; the back pressure mechanism comprises a vertical baffle, a top baffle, a first telescopic piece, a back pressure water bag and a water supply structure; one end of the vertical baffle is arranged on the travelling mechanism; the top baffle is hinged with the other end of the vertical baffle through a connecting rod; the back pressure water bag is arranged on the top baffle and is positioned on one side of the top baffle, which is close to the rock-soil body; two ends of the first telescopic piece are sequentially hinged with the vertical baffle and the top baffle, and the first telescopic piece can drive the top baffle to rotate around the hinged position of the top baffle and the vertical baffle, so that the back pressure water bag is moved above the unstable rock-soil body; the water supply mechanism is arranged in the running mechanism, and the water supply structure can charge and discharge water for the counter-pressure water bag.
The utility model discloses in, remove back pressure mechanism to gushing mud, places such as landslide through running gear, after confirming the back pressure position, drive the top shield through first extensible member and rotate, make the back pressure water bag on the top shield remove unstability ground body top, the water supply structure is to back pressure water bag bath, drive the gravity that the top shield opened and shut with the back pressure water bag through first extensible member, exert decurrent effort to unstability ground simultaneously, under the combination of vertical baffle and back pressure water bag, compact the ground body, improve domatic stability.
Preferably, the vertical baffle is arranged on the travelling mechanism through a lifting mechanism; the lifting mechanism comprises a baffle groove, a second telescopic piece and a lifting disc; the vertical baffle is vertically inserted in the baffle groove in a sliding manner; the second telescopic piece drives the vertical baffle to slide in the baffle slot; the lifting disc drives the baffle groove to lift.
The lifting disc drives the baffle groove to lift, so that the baffle groove is in contact with the ground, and rock-soil bodies are effectively prevented from being extruded out from a gap between the baffle groove and the ground; and the second telescopic piece drives the vertical baffle to vertically slide in the baffle groove, so that the height of the top baffle on the vertical baffle is adjusted, and the vertical baffle can be suitable for unstable rock-soil bodies with different heights.
Preferably, the water supply structure comprises a compression pump and a pipeline; the compression pump is fixedly arranged on the travelling mechanism and is communicated with the back pressure water bag through a pipeline. The compression pump acts and charges and discharges water into the back pressure water bag through the pipeline.
Preferably, the device also comprises a buffer water bag; the buffering water bag is fixedly arranged on one side of the baffle groove close to the rock-soil body; and the buffer water bag is communicated with the pipeline through a water inlet check valve, and the buffer water bag is communicated with the back pressure water bag through a water outlet check valve. The pipeline is washed by water to the buffering water bag fast through the water inlet check valve, and when the ground body unstability landing, the impact force of production will act on the buffering water bag, extrudees its inside water to the back pressure water bag by the delivery port check valve, plays the effect of alleviating ground body impact force on the one hand, and on the other hand can fill water fast to the back pressure water bag, has also realized the cyclic utilization of water.
Preferably, the back-pressure water bag comprises a plurality of step water bags, a water bag bottom plate and a water bag side plate; the step-shaped water bags are fixedly arranged on the top baffle in a step manner, and two adjacent step-shaped water bags are communicated with each other through overflow holes; the bottom and the side of the step water bag are respectively fixedly provided with the water bag bottom plate and the water bag side plate. The step water bags fill the water in the step water bags through the overflow holes, and the step water bags act on the water bag bottom plate and the water bag side plates after being filled with water, so that the rock and soil body is compacted into a flat step shape, and the stability of the slope is improved.
Preferably, the travelling mechanism comprises a chassis, a frame and tires; a plurality of tires are arranged on the chassis; a plurality of tires drive the chassis to move through mechanical transmission; the frame is fixedly installed on the chassis, and one end of the vertical baffle is installed on the frame. The chassis is driven to move by the rotation of the tires, and the chassis drives the counter-pressure mechanism to move to specified places such as mud gushing and landslide through the frame.
Preferably, the drilling machine further comprises a plurality of auger rods, wherein the auger rods are installed in the vehicle frame, penetrate through the chassis and can drill downwards to a specified depth. A plurality of spiral drill rods are used for downwards rotating and drilling to a specified depth so as to limit the movement of the travelling mechanism and provide horizontal counter pressure for the rock-soil body.
Preferably, a plurality of vibrators are arranged on one side of the baffle slot close to the rock-soil body. After the vibrator is started, the rock-soil body is compacted through the vibration effect, and the back pressure effect is improved.
Compared with the prior art, the utility model discloses at least, following advantage has:
1. the rock-soil mass can be compacted, and the slope stability is improved. The utility model discloses in, remove back pressure mechanism to gushing mud, places such as landslide through running gear, after confirming the back pressure position, drive the top shield through first extensible member and rotate, make the back pressure water bag on the top shield remove unstability ground body top, the water supply structure is to back pressure water bag bath, drive the gravity that the top shield opened and shut with the back pressure water bag through first extensible member, exert decurrent effort to unstability ground simultaneously, under the combination of vertical baffle and back pressure water bag, compact the ground body, improve domatic stability. Meanwhile, the step water bags fill the water in the step water bags through the overflow holes, and the step water bags act on the water bag bottom plate and the water bag side plates after being filled with water, so that the rock-soil body is compacted into a flat step shape, and the slope stability can be further improved.
2. The impact force of the rock-soil body can be effectively relieved, and the water recycling is realized. The utility model discloses in, the pipeline carries out the fast bath to buffering water bag through the water inlet check valve, and when ground body unstability landing, the impact force of production will act on buffering water bag, extrudees its inside water to the back pressure water bag by the delivery port check valve, plays the effect of alleviating ground body impact force on the one hand, and on the other hand can fill water fast to the back pressure water bag, has also realized the cyclic utilization of water.
Drawings
In order to more clearly illustrate the embodiments of the present invention, the drawings used in the embodiments will be briefly described below. In all the drawings, the elements or parts are not necessarily drawn to actual scale.
Fig. 1 is a schematic diagram of the movable rapid back pressure device for unstable rock and soil mass before back pressure according to the embodiment of the present invention.
Fig. 2 is a schematic diagram of the movable rapid back pressure device for unstable rock and soil mass after back pressure according to the embodiment of the present invention.
Fig. 3 is a schematic perspective view of the back pressure mechanism and the lifting mechanism in fig. 1.
Fig. 4 is a schematic structural view of the back pressure mechanism, the lifting mechanism and the buffering water bag in fig. 1.
Reference numerals are as follows:
1-chassis, 2-tire, 3-frame, 4-auger stem, 5-compression pump, 6-lifting disc, 7-baffle groove, 8-first telescopic piece, 9-vertical baffle, 10-connecting rod, 11-second telescopic piece, 12-top baffle, 13-counter pressure water bag, 131-step water bag, 14-pipeline, 15-vibrator, 16-buffer water bag, 171-water outlet check valve, 172-water inlet check valve, 18-water bag bottom plate, 19-water bag side plate and 20-overflow hole.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only used to illustrate the technical solutions of the present invention more clearly, and therefore are only used as examples, and the protection scope of the present invention is not limited thereby.
In the present invention, it is to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or may be connected through the use of two elements or the interaction of two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
Referring to fig. 1-2, the present invention provides an embodiment: a movable rapid back pressure device for destabilization of rock and soil mass, comprising: a traveling mechanism and a back pressure mechanism; the walking mechanism drives the back pressure mechanism to move; the back pressure mechanism comprises a vertical baffle 9, a top baffle 12, a first telescopic piece 8, a back pressure water bag 13 and a water supply structure; one end of the vertical baffle 9 is arranged on the travelling mechanism; the top baffle 12 is hinged with the other end of the vertical baffle 9 through a connecting rod 10; the back pressure water bag 13 is arranged on the top baffle 12 and is positioned on one side of the top baffle 12 close to the rock-soil body; two ends of the first telescopic piece 8 are sequentially hinged with the vertical baffle 9 and the top baffle 12, and the first telescopic piece 8 can drive the top baffle 12 to rotate around the hinged position of the top baffle 12 and the vertical baffle 9, so that the back pressure water bag 13 moves to the position above the unstable rock-soil body; the first telescopic part 8 adopts a hydraulic cylinder; it is understood that in other embodiments, the first telescopic member 8 may also be other structures capable of driving the top baffle 12 to rotate around the hinge joint of the top baffle 12 and the vertical baffle 9, such as an air cylinder, an electric telescopic rod, etc.; the water supply mechanism is arranged in the running mechanism and can charge and discharge water for the counter-pressure water bag 13.
When the concrete implementation, remove back pressure mechanism to gushing mud through running gear, places such as landslide, after confirming back pressure position, drive top baffle 12 through first extensible member 8 and rotate, make back pressure water bag 13 on the top baffle 12 remove unstability ground body top, the feed water structure is to back pressure water bag 13 bath, drive top baffle 12 through first extensible member 8 and open and shut with the gravity of back pressure water bag 13, exert decurrent effort to unstability ground simultaneously, under the combination of vertical baffle 9 and back pressure water bag 13, compact the ground body, improve domatic stability.
Referring to fig. 1-3, in other embodiments, the vertical baffle 9 is mounted on the running gear by a lifting mechanism; the lifting mechanism comprises a baffle slot 7, a second telescopic piece 11 and a lifting disc 6; the vertical baffle 9 is vertically inserted in the baffle groove 7 in a sliding manner; the second telescopic piece 11 drives the vertical baffle 9 to slide in the baffle slot 7; the second telescopic part 11 adopts a hydraulic cylinder; it is understood that, in other embodiments, the second telescopic element 11 may also be other structures capable of driving the vertical baffle 9 to slide in the baffle slot 7, such as an air cylinder, an electric telescopic rod, or the like; the lifting disc 6 drives the baffle slot 7 to lift, and the lifting disc 6 drives the baffle slot 7 to lift by adopting hydraulic pressure. Further, in order to improve the back pressure effect, a plurality of vibrators 15 are installed on one side of the baffle slot 7 close to the rock-soil body. After the vibrator 15 is started, the rock-soil mass is compacted through the vibration effect.
During specific implementation, the lifting disc 6 drives the baffle slot 7 to lift, so that the baffle slot 7 is in contact with the ground, and rock-soil bodies are effectively prevented from being extruded out from a gap between the baffle slot 7 and the ground; and then the second telescopic piece 11 drives the vertical baffle 9 to vertically slide in the baffle groove 7, so that the height of the top baffle 12 on the vertical baffle 9 is adjusted, and the rock-soil instability adjusting device can be suitable for unstable rock-soil bodies with different heights.
Referring to fig. 1-2, in other embodiments, the water feeding structure may be a structure including a compression pump 5 and a pipe 14; the compression pump 5 is fixedly arranged on the travelling mechanism, and the compression pump 5 is communicated with the back pressure water bag 13 through a pipeline 14. In specific implementation, the compression pump 5 is operated, and the compression pump 5 charges and discharges water into the back pressure water bag 13 through the pipeline 14.
Referring to fig. 1 and 4, in other embodiments, a buffer water bag 16 is further included; the buffering water bag 16 is fixedly arranged on one side of the baffle groove 7 close to the rock-soil body; and the buffer water bag 16 is communicated with the pipe 14 through the water inlet check valve 172, and the buffer water bag 16 is communicated with the back pressure water bag 13 through the water outlet check valve 171. During specific implementation, the pipeline 14 flushes the buffer water bag 16 rapidly through the water inlet check valve 172, when the rock-soil body is unstable and slides down, the generated impact force acts on the buffer water bag 16, the water in the buffer water bag is extruded to the back pressure water bag 13 through the water outlet check valve 171, on one hand, the effect of relieving the impact force of the rock-soil body is achieved, on the other hand, the back pressure water bag 13 can be filled with water rapidly, and the water recycling is also achieved.
Referring to fig. 1-2, in other embodiments, the counter-pressure water bag 13 may be a structure including a plurality of stepped water bags 131, a water bag bottom plate 18, and a water bag side plate 19; the plurality of step water bags 131 are fixedly arranged on the top baffle 12 in a step manner, and two adjacent step water bags 131 are communicated with each other through the overflow holes 20; the bottom and the side of the step water bag 131 are respectively and fixedly provided with a water bag bottom plate 18 and a water bag side plate 19. In specific implementation, the step water bags 131 fill the step water bags 131 through the overflow holes 20, and the step water bags 131 act on the water bag bottom plate 18 and the water bag side plates 19 after being filled with water, so that rock-soil bodies are compacted into flat steps, and the slope stability is improved.
Referring to fig. 1-2, in other embodiments, the running gear mechanism may be a structure including a chassis 1, a frame 3, and tires 2; a plurality of tires 2 are arranged on the chassis 1; the plurality of tires 2 drive the chassis 1 to move through mechanical transmission; the frame 3 is fixedly arranged on the chassis 1, and one end of the vertical baffle 9 is arranged on the frame 3. The chassis 1 is driven to move by the rotation of the tires 2, and the chassis 1 drives the back pressure mechanism to move to specified places such as mud gushing and landslide through the frame 3. Furthermore, in order to limit the movement of the travelling mechanism, the travelling mechanism further comprises a plurality of spiral drill pipes 4, the spiral drill pipes 4 are installed in the vehicle frame 3, and the spiral drill pipes 4 penetrate through the chassis 1 and can be drilled downwards to a specified depth. And horizontal counter pressure can be provided for the rock-soil body through downwards rotary drilling of the plurality of spiral drill rods 4 to a specified depth.
In specific implementation, the spiral drill rod 4, the lifting disc 6, the baffle groove 7, the vertical baffle 9, the connecting rod 10 and the top baffle 12 are made of iron materials; the water bag bottom plate 18 and the water bag side plate 19 are made of high-strength stainless steel materials; the counter-pressure water bag 13, the pipeline 14 and the buffer water bag 16 are made of high-density PVC materials.
The utility model discloses a theory of operation and use flow:
the movable rapid back pressure device is driven to places such as mud gushing places, landslides and the like, after the back pressure position is determined, the spiral drill rod 4 is downwards drilled to a designated depth in a rotary mode to limit the movement of the movable rapid back pressure device, and horizontal back pressure can be provided for a rock and soil body. Then through the decline of lifting disk 6, with baffle groove 7 and ground contact to through the flexible of first extensible member 8 in baffle groove 7, realize vertical baffle 9 upwards lifting, when its height surpasss the ground body height, stop the lifting, through the flexible of second extensible member 11, realize the outwards expansion of top baffle 12. Then, the pipeline 14 is connected with an external water source, the water inlet check valve 172 is used for quickly filling the buffer water bag 16 with water under the pressurization of the compression pump 5, when the rock-soil body is unstable and slides down, the generated impact force acts on the buffer water bag 16, the water in the rock-soil body is extruded to the back pressure water bag 13 through the pipeline 14 by the water outlet check valve 171, on one hand, the effect of relieving the impact force of the rock-soil body is achieved, on the other hand, the back pressure water bag 13 can be quickly filled with water, and the water recycling is also achieved.
After the slope of the rock-soil body slides down and the stacking height exceeds the bottom of the counter-pressure water bag 13, the counter-pressure water bag 13 is continuously and quickly filled with water through the pipeline 14, after the first step water bag 131 is filled with water, the second step water bag 131 is continuously filled with water through the overflow hole 20 on the upper part of the side wall of the first step water bag, and the like until all the step water bags 131 are filled with water, in addition, the bottom and the side wall of the step water bag 131 are respectively provided with the water bag bottom plate 18 and the water bag side plate 19, so that the flowing plastic rock-soil body can be guaranteed to be compacted into a step shape which ascends in sequence, and the slope stability is improved. In the process of water filling and back pressure of the back pressure water bag 13, the vibrator 15 is started, and the rock and soil mass is further compacted through the synergistic effect of vibration and back pressure, so that instability disasters are effectively controlled.
After the rock-soil mass is stabilized, the back pressure construction can be finished through operations of discharging water through the back pressure water bag 13, recovering the top baffle 12, recovering the vertical baffle 9, lifting the baffle groove 7, recovering the spiral drill rod 4 and the like in sequence.
The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the scope of the embodiments of the present invention, and are intended to be covered by the claims and the specification.
Claims (8)
1. A quick back pressure device of movable for ground body unstability which characterized in that includes: a traveling mechanism and a back pressure mechanism;
the walking mechanism drives the back pressure mechanism to move;
the back pressure mechanism comprises a vertical baffle (9), a top baffle (12), a first telescopic piece (8), a back pressure water bag (13) and a water supply structure;
one end of the vertical baffle (9) is arranged on the travelling mechanism;
the top baffle (12) is hinged with the other end of the vertical baffle (9) through a connecting rod (10);
the back pressure water bag (13) is arranged on the top baffle (12) and is positioned on one side, close to the rock-soil body, of the top baffle (12);
two ends of the first telescopic piece (8) are sequentially hinged with the vertical baffle (9) and the top baffle (12), and the first telescopic piece (8) can drive the top baffle (12) to rotate around the hinged position of the top baffle (12) and the vertical baffle (9), so that the back pressure water bag (13) is moved above the unstable rock-soil body;
the water supply mechanism is arranged in the travelling mechanism and can charge and discharge water for the counter-pressure water bag (13).
2. The movable rapid back pressure device for destabilization of rock-soil mass according to claim 1, characterized in that the vertical baffle (9) is mounted on the running gear by a lifting gear;
the lifting mechanism comprises a baffle slot (7), a second telescopic piece (11) and a lifting disc (6);
the vertical baffle (9) is vertically inserted in the baffle groove (7) in a sliding manner;
the second telescopic piece (11) drives the vertical baffle (9) to slide in the baffle groove (7);
the lifting disc (6) drives the baffle slot (7) to lift.
3. The movable rapid back pressure device for destabilization of rock-soil mass according to claim 1, characterized in that said water supply structure comprises a compression pump (5) and a pipeline (14); the compression pump (5) is fixedly installed on the traveling mechanism, and the compression pump (5) is communicated with the back-pressure water bag (13) through a pipeline (14).
4. A movable rapid back pressure device for destabilization of rock-soil mass according to claim 3, further comprising a buffer water bag (16); the buffer water bag (16) is fixedly arranged on one side of the baffle groove (7) close to the rock-soil body; the buffer water bag (16) is communicated with the pipeline (14) through a water inlet check valve (172), and the buffer water bag (16) is communicated with the back pressure water bag (13) through a water outlet check valve (171).
5. The movable rapid back-pressure device for destabilization of rock-soil mass according to claim 1, wherein said back-pressure water bag (13) comprises a plurality of stepped water bags (131), a water bag bottom plate (18) and a water bag side plate (19);
the step-shaped water bags (131) are fixedly arranged on the top baffle (12) in a step manner, and two adjacent step-shaped water bags (131) are communicated with each other through overflow holes (20);
the bottom and the side of the step water bag (131) are respectively and fixedly provided with the water bag bottom plate (18) and the water bag side plate (19).
6. The movable rapid back pressure device for rock-soil body instability according to claim 1, wherein the walking mechanism comprises a chassis (1), a frame (3) and a tire (2);
a plurality of tires (2) are arranged on the chassis (1);
the plurality of tires (2) drive the chassis (1) to move through mechanical transmission;
the frame (3) is fixedly installed on the chassis (1), and one end of the vertical baffle (9) is installed on the frame (3).
7. The movable rapid back pressure device for destabilization of rock-soil mass according to claim 6, further comprising a plurality of auger pipes (4), wherein the auger pipes (4) are installed in the vehicle frame (3), and the auger pipes (4) penetrate through the chassis (1) and can be torqued down to a designated depth.
8. A mobile rapid back pressure device for destabilization of rock-soil mass according to claim 2, characterized in that a plurality of vibrators (15) are mounted to one side of the dam channel (7) adjacent to the rock-soil mass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221446802.1U CN217630006U (en) | 2022-06-10 | 2022-06-10 | Movable rapid back pressure device for instability of rock and soil mass |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221446802.1U CN217630006U (en) | 2022-06-10 | 2022-06-10 | Movable rapid back pressure device for instability of rock and soil mass |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217630006U true CN217630006U (en) | 2022-10-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221446802.1U Active CN217630006U (en) | 2022-06-10 | 2022-06-10 | Movable rapid back pressure device for instability of rock and soil mass |
Country Status (1)
| Country | Link |
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| CN (1) | CN217630006U (en) |
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2022
- 2022-06-10 CN CN202221446802.1U patent/CN217630006U/en active Active
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