CN214145354U - Drilling device for complex high and steep slope - Google Patents
Drilling device for complex high and steep slope Download PDFInfo
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- CN214145354U CN214145354U CN202022685472.9U CN202022685472U CN214145354U CN 214145354 U CN214145354 U CN 214145354U CN 202022685472 U CN202022685472 U CN 202022685472U CN 214145354 U CN214145354 U CN 214145354U
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- 238000005553 drilling Methods 0.000 title claims abstract description 150
- 239000011435 rock Substances 0.000 claims abstract description 54
- 230000006835 compression Effects 0.000 claims abstract description 7
- 238000007906 compression Methods 0.000 claims abstract description 7
- 238000009826 distribution Methods 0.000 claims abstract description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 39
- 239000010959 steel Substances 0.000 claims description 39
- 239000002689 soil Substances 0.000 claims description 25
- 230000005540 biological transmission Effects 0.000 claims description 20
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 12
- 230000002787 reinforcement Effects 0.000 abstract 1
- 238000010276 construction Methods 0.000 description 5
- 239000010410 layer Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000005755 formation reaction Methods 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 230000008602 contraction Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 238000009527 percussion Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000007569 slipcasting Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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Abstract
The utility model discloses a drilling equipment of complicated high steep side slope, including drilling machine support, rig substructure and drilling machine. The drilling machine support comprises a sliding plate, a chassis is arranged on the sliding plate, the front end of the chassis is hinged with the front end of a platform, a supporting member is hinged with the platform and connected with a chassis fastener, and the widths of the chassis and the platform can be adjusted; the drilling machine comprises an electric power distribution system, an air compression system, gears, a rock drilling component, an earth drilling component, a drill rod and a drill bit. The utility model provides a problem of complicated high steep side slope drilling difficulty, adaptable in various ground body stratum can deal with complicated domatic condition such as unsmooth, luxuriant forest, the action is nimble, and performance safe and reliable can fully deal with the reinforcement engineering of current complicated high steep side slope.
Description
Technical Field
The utility model belongs to the technical field of geotechnical engineering, concretely relates to drilling equipment of complicated high steep side slope.
Background
In the natural environment, a large number of dangerous slopes exist, and the possibility of instability and landslide is faced at all times. In order to ensure the life and property safety of people, the dangerous side slope needs to be artificially reinforced. However, the properties of the side slope are relatively complex (1) the stratum is complex, part of the surface layer of the side slope is soil, and the rock mass is formed after a certain depth. (2) The slope is complex. The vegetation on the slope is dense, the slope is uneven, and the soil body is soft. Therefore, the conventional drilling technique has the following problems: (1) due to the change of soil layers, the drilling equipment needs to be frequently replaced. (2) The soil body is soft, the vegetation is dense, and the scaffold construction can not be carried out. (3) The existing movable drilling platform has huge volume and cannot shuttle in jungles. (4) The existing movable drilling platform is of a four-wheel type, the uneven road surface is difficult to advance, and the stability during drilling is poor. It is important to encounter both earth and rock formations and the conventional solution to this problem is to replace the drilling equipment. However, such a solution has the following problems: (1) the replacement, transportation, assembly and check of the machine tool equipment take a lot of time, particularly under the condition of high slope support operation, the difficulty of replacing the equipment is very high, and the construction period is prolonged. (2) Different drilling equipment is replaced or leased according to different stratum conditions, and the construction cost is increased invisibly. (3) The replacement and displacement of the machine tool easily cause hole position deviation, so that the breakage accident of the drill rod is frequently caused.
Disclosure of Invention
To the above technical problem, the utility model aims at providing a drilling equipment of complicated high steep side slope suitable for rock and soil stratum, technical scheme is as follows:
a drilling device for a complex high and steep side slope comprises a drilling machine support, a drilling machine base and a drilling machine; the drilling machine support comprises a sliding plate, a chassis is arranged on the sliding plate, the front end of the chassis is hinged with the front end of a platform, the chassis and the platform form any angle, a supporting member is hinged with the platform and connected with a chassis fastener for adjusting the angle between the chassis and the platform, and the width of the chassis and the width of the platform can be adjusted; the drilling machine comprises a power distribution system, an air compression system, a rock drilling component, a soil drilling component, a gear, a drill rod and a drill bit at the bottom of the drill rod; the rock drilling component comprises a cylinder, an air pipe is arranged at the top of the cylinder, an opening is formed in the bottom of the cylinder, a piston is arranged in the cylinder, the top of the piston is fixedly connected with the turbine fan blades, and the bottom of the piston is fixedly connected with a force transmission component; the soil drilling component comprises a soil drilling shell and a motor, the force transmission component is arranged in the soil drilling shell, and the motor is arranged in the force transmission component; the inner part of the gear is connected with the drill rod in an embedded mode, the outer part of the gear is respectively connected with the bottom of the force transmission component and the motor in a meshed mode, and the bottom of the gear is fixedly connected with the drill rod through the force bearing component; the drill bit includes the auger bit, and the auger bit bottom is connected with the rock drilling drill bit that excels in, and it both satisfies the function of digging soon of soil layer drilling and satisfies the impact rock drilling function of stratum drilling.
The chassis and the platform comprise two longitudinal steel pipes parallel to the sliding plate and a cross steel pipe sleeved on the longitudinal steel pipes, the opening and closing of the cross steel pipes are realized by sliding along the longitudinal steel pipes through the sleeve openings, and the synchronous extension of the width of the platform and the width of the chassis is realized.
Ropes are tied on two sides of the chassis, and the lifting and descending of the drilling machine bracket can be controlled through the rolling machine.
The longitudinal steel pipe of the chassis is fixedly connected with the sliding plate, and the front end of the longitudinal steel pipe of the chassis is hinged with the front end of the longitudinal steel pipe of the platform. The supporting member is hinged with the rear end of the longitudinal steel pipe of the platform and connected with a longitudinal steel pipe fastener of the chassis.
The platform further comprises a front telescopic beam and a rear telescopic beam which are connected with the inner sides of the longitudinal steel pipes of the platform, and the length of the telescopic beams is synchronously changed according to the width of the platform.
The drilling machine support further comprises guardrails, the guardrails are respectively arranged on the left side, the right side and the rear side of the platform, the guardrails on the left side and the right side are fixed and unchanged, the guardrail on the rear side is a telescopic guardrail, and the length of the telescopic guardrail is synchronously changed according to the width of the platform.
Preferably still include level and vertical reinforcement steel pipe, consolidate the steel pipe and hit inside and the high-pressure slip casting of rock, two telescopic crossbeam before the platform, back are connected with level and vertical reinforcement steel pipe through the fastener respectively. The stability of drilling is guaranteed to be kept, and the safety performance is improved.
The drill rod is lengthened by adopting splicing type connection assembly, for example, the drill rod is lengthened by adopting threaded connection assembly, and the drill rod is assembled according to the drilling depth, so that the drill rod meets the requirement of the drilling depth.
The top of the piston is fixedly connected with the shaft or the fan blade of the turbine fan blade.
The drilling machine further comprises a dismounting device, such as a wrench, the drill bit and the dismounting device are meshed with each other, and the drill rod and the drill bit are dismounted automatically by controlling the drill rod to rotate in the opposite direction.
And a rock drilling shell is arranged outside the cylinder and is connected with the soil drilling shell through bolts.
The gear is one, can also be upper and lower two, and the gear outside on the top meshes with the motor, and the gear outside on the lower limit meshes with the bottom of biography power component, and the bottom of lower gear passes through atress component and drilling rod fixed connection. Preferably one gear.
A construction method of a drilling device for a complex high and steep side slope comprises the following steps: the method comprises the following steps:
1) pulling the drilling machine bracket in the contraction state to a designated position;
2) unfolding and locking a drilling machine bracket;
3) adjusting the angle between the chassis and the platform to enable the platform to be in a horizontal state;
4) installing a drilling machine base and a drilling machine;
5) and (3) starting drilling: when the high-strength rock drilling bit contacts the soil layer, a motor is started, and the motor drives the spiral drill bit and the high-strength rock drilling bit to rotate through the rotation of the drill rod so as to drill a hole; when the high-strength rock drilling bit contacts a rock stratum, the air compression system (pumping in or pumping out gas) controls the turbine fan blades through the air pipe to drive the piston to rotate, and simultaneously controls the piston to move up and down, so that the force transmission component drives the drill rod to rotate, and drives the spiral drill bit and the high-strength rock drilling bit to rotate, and simultaneously transmits impact load to the force bearing component, and the drill rod drives the high-strength rock drilling bit to rotate and drill rock.
The utility model has the advantages that:
(1) can adapt to different stratum conditions. The drilling machine can adopt different drilling modes according to different stratum conditions, and when meeting a soil stratum, the drilling machine can drill holes by adopting a mode of drilling and digging by rotating the auger; when a hard rock mass formation is encountered, the hole may be drilled by percussion drilling.
(2) The maneuverability is strong. The drilling machine support can be contracted, and can freely pass through between the convex stones or the metallocene forest after being reduced to a certain volume, so that the drilling machine support is flexible and safe.
(3) Can be adapted to the complex slope. The slope surface of the side slope is uneven mostly, vegetation covers the side slope, common four-wheel movable platforms are difficult to advance on the slope surface, and the drilling support is of a sliding plate type and can freely slide on the slope surface.
(4) The structure is stable. Because the reinforcing steel pipe of the rock-socketed grouting is arranged, the reinforcing steel pipe is connected with the front and the rear telescopic cross beam fasteners of the drilling machine platform, and the stability and the safety performance of the device can be effectively enhanced.
(5) Green, environment-friendly, energy-saving and noise-reducing. The rock drilling component takes compressed air as a power source, has no harmful products, and is energy-saving and environment-friendly; and meanwhile, the working efficiency of the rock drilling part is high.
(6) The free switching between drilling and punching of the equipment is realized. When the drill bit works in the soil body, the drill bit is controlled by the motor to rotate for drilling; when the drill bit works in rocks, the air pump controls the piston to move up and down, so that rock drilling work is realized, and under the action of the air pump, the turbine fan blades at the upper end of the piston drive the piston to rotate at low frequency, so that the drill bit is driven to rotate at low speed, and the drill bit is enabled to drill holes more uniformly.
(7) The motor drilling is stable and can provide suitable torque. When the soil body is drilled, rock drilling is not needed to be chiseled, the motor drives the drill rod to rotate, the rotation frequency of the motor is more stable relative to the rotation of the air pump and the hydraulic control drill rod, meanwhile, the motor can provide torque meeting drilling requirements, and the torque is limited by the air pump and the hydraulic control drill rod.
(8) The transmission system is stable and firm. The invention develops a novel force transmission component and a novel force bearing component to form a set of brand new transmission system. The force transmission component and the stress component are combined for use, so that two working states can be perfectly divided, two works of drilling in soil and drilling in rock are independently carried out, and no correlation is generated between the two works. Meanwhile, the combination of the force transmission component and the stress component plays an important role in stabilizing the drill rod greatly.
(9) The drill bit is firm. The drill bit directly acts with the rock-soil body in the drilling process, so the drill bit is the weakest part of the drilling machine. The utility model provides a drill bit is auger bit and the combination drill bit of the high strength drill bit, makes it both satisfy dig soon and strike the demand of rock drilling, does not take place to destroy at the drilling process.
(10) The rock drilling is uniform. Because the upper end of the piston is provided with the turbine fan blades, when air is pumped in or pumped out, the force transmission component drives the drill rod to rotate, and the high-strength rock drilling bit rotates when impacting rock drilling, so that the rock drilling holes are more uniform.
Drawings
FIG. 1 is a schematic view of the present invention;
FIG. 2 is a schematic illustration of the deployment of the drill support;
FIG. 3 is an illustration of the borehole support retracted;
FIG. 4 is a schematic view of a rock drilling component and an earth drilling component;
fig. 5 is a sectional view a-a.
Wherein, 1, a drilling machine bracket; 2. a drilling machine; 3. a slide plate; 4. a chassis; 401. a longitudinal steel pipe of the chassis; 402. a chassis cross steel pipe; 403. a chassis looping; 5. a platform; 501. a platform longitudinal steel pipe; 502. a platform cross steel pipe; 503. sleeving a platform; 504. a telescoping beam; 6. a guardrail; 601. left and right side rails; 602. a rear side guard rail; 7. a support member; 8. a rope; 9. a winch; 10. a power distribution system; 11. an air compression system; 12. a drill base; 13. a rock drilling component; 131. a cylinder; 132. an air tube; 133. a piston; 134. turbine blades; 135. a force transfer member; 14. drilling a soil component; 141. a motor; 15. a drill stem; 151. a force-receiving member; 152. a thread; 16. a drill bit; 161. a helical drill bit; 162. a high strength rock drill bit; 17. and (5) reinforcing the steel pipe.
Detailed Description
It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "longitudinal," "transverse," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings to facilitate the description of the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.
Example 1
1-5, the drilling device for complex high and steep slope comprises a drilling machine bracket 1, a drilling machine base 12 and a drilling machine 2; the drilling machine bracket 1 comprises a sliding plate 3, a chassis 4 arranged on the sliding plate 3 and a platform 5; the chassis 4 comprises two chassis longitudinal steel pipes 401 parallel to the sliding plate and chassis cross steel pipes 402 sleeved on the chassis longitudinal steel pipes 401, a chassis sleeve opening 403 slides along the chassis longitudinal steel pipes 401 to realize opening and closing of the chassis cross steel pipes 402, the chassis longitudinal steel pipes 401 are fixedly connected with the sliding plate 3, the platform 5 comprises two platform longitudinal steel pipes 501 parallel to the sliding plate, a platform cross steel pipe 502 sleeved on the platform longitudinal steel pipe 501, and a front telescopic cross beam 504 and a rear telescopic cross beam 504, and the platform sleeve opening 503 realizes opening and closing of the platform cross steel pipe 502 by sliding along the platform longitudinal steel pipes 501; the front end of the chassis longitudinal steel pipe 401 is hinged with the front end of the platform longitudinal steel pipe 501 to realize that the chassis 4 and the platform 5 form any angle, and the supporting member 7 is hinged with the rear end of the platform longitudinal steel pipe 501 and connected with a fastener of the chassis longitudinal steel pipe 401 to adjust the angle between the chassis 4 and the platform 5; the drilling machine 2 comprises an electric power distribution system 10, an air compression system 11, a rock drilling component 13, an earth drilling component 14, a gear, a drill rod 15 and a drill bit 16 at the bottom of the drill rod; the rock drilling part 13 comprises a rock drilling shell, a cylinder 131 is arranged in the rock drilling shell, an air pipe 132 is arranged at the top of the cylinder 131, a hole is formed in the bottom of the cylinder 131, a piston 133 is arranged in the cylinder, the top of the piston 133 is fixedly connected with a shaft of a turbine fan blade 134, and the bottom of the piston 133 is fixedly connected with a force transmission component 135; the earth drilling component 14 comprises an earth drilling shell and a motor 141, the force transmission component 135 is arranged in the earth drilling shell, and the motor 141 is arranged in the force transmission component 135; the inner part of the gear is connected with the drill rod 15 in an embedded mode, the outer part of the gear is respectively connected with the bottom of the force transmission component 153 and the motor 141 in a meshed mode, and the bottom of the gear is fixedly connected with the drill rod 15 through the stress component 151; the drill bit 16 comprises a spiral drill bit 161, and a high-strength rock drilling drill bit 162 is connected to the bottom of the spiral drill bit 161, so that the rotary drilling function of soil layer drilling and the impact rock drilling function of rock stratum drilling are met.
Ropes 8 are tied on two sides of the chassis 4, and the lifting and descending of the drilling machine bracket 1 can be controlled through the winding machine.
Drilling machine support 1 still includes guardrail 6, and left and right and rear side of platform 5 are located respectively to guardrail 6, and left and right side guardrail 601 is fixed unchangeable, and rear side guardrail 602 is scalable guardrail, according to the synchronous length that changes scalable guardrail of platform 5 width.
The drilling machine support 1 further comprises horizontal and vertical reinforcing steel pipes 17, the reinforcing steel pipes 17 are hit to the interior of a rock and are subjected to high-pressure grouting, and the front and rear telescopic cross beams 504 of the platform are connected with the horizontal and vertical reinforcing steel pipes 17 through connecting fasteners 18 respectively. The stability of drilling is guaranteed to be kept, and the safety performance is improved.
The drill rod 15 is lengthened by adopting thread assembly, and the drill rod is assembled according to the drilling depth, so that the drill rod meets the requirement of the hole depth.
The bottom of the drill rod 15 is in threaded connection with the drill bit 16, and further, the drilling machine further comprises a dismounting device, such as a wrench, the drill bit and the dismounting device are mutually meshed, and the drill rod and the drill bit are automatically dismounted by controlling the drill rod to rotate in the opposite direction.
The rock drilling shell is connected with the soil drilling shell through bolts.
The gear is one.
A construction method of a drilling device for a complex high and steep side slope comprises the following steps: the method comprises the following steps:
1) the drill rig bracket 1 in the retracted state is pulled to a designated position.
2) The drill rig support 1 is unfolded and locked.
3) The angle between the chassis 4 and the platform 5 is adjusted to make the platform 5 in a horizontal state.
4) The reinforced steel pipe 17 is driven into the rock and high pressure grouted.
5) The reinforced steel pipe 17 is connected with fasteners of front and rear telescopic cross beams 504 of the drilling machine platform.
6) Installing a drilling machine base 12 and a drilling machine 2;
7) and (3) starting drilling: when the high-strength rock drilling bit 162 contacts the soil layer, the motor 141 is started, and the motor 141 drives the spiral bit 161 and the high-strength rock drilling bit 162 to rotate through the rotation of the drill rod 15 so as to drill a hole; when the high-strength rock drilling bit 162 contacts the rock stratum, the air compression system 11 controls the turbine fan blades 134 through the air pipe to drive the piston 133 to rotate at a low frequency (realized by adjusting the number of turbines or changing the angles of the turbine fan blades), and controls the piston 133 to move up and down at the same time, so that the force transmission component 135 drives the drill rod 15 to rotate, and drives the spiral drill bit 161 and the high-strength rock drilling bit 162 to rotate, and simultaneously, impact load is transmitted to the force bearing component 151, and the high-strength rock drilling bit 162 is driven to rotate through the drill rod 15 while rock drilling is carried out.
Claims (8)
1. The utility model provides a drilling equipment of complicated high steep side slope which characterized in that: comprises a drilling machine bracket (1), a drilling machine base (12) and a drilling machine (2); the drilling machine support (1) comprises a sliding plate (3), a chassis (4) is arranged on the sliding plate (3), the front end of the chassis (4) is hinged with the front end of a platform (5), a supporting member (7) is hinged with the platform (5) and connected with a fastener of the chassis (4), and the widths of the chassis (4) and the platform (5) can be adjusted; the drilling machine comprises a power distribution system (10), an air compression system (11), a rock drilling component (13), an earth drilling component (14), a gear, a drill rod (15) and a drill bit (16) at the bottom of the drill rod; the rock drilling component (13) comprises a cylinder (131), an air pipe (132) is arranged at the top of the cylinder (131), the bottom of the cylinder (131) is provided with a hole, a piston (133) is arranged in the cylinder (131), the top of the piston (133) is fixedly connected with turbine blades (134), and the bottom of the piston (133) is fixedly connected with a force transmission component (135); the soil drilling component (14) comprises a soil drilling shell and a motor (141), the force transmission component (135) is arranged in the soil drilling shell, and the motor (141) is arranged in the force transmission component (135); the inner part of the gear is connected with the drill rod (15) in a nested manner, the outer part of the gear is respectively connected with the bottom of the force transmission component (135) and the motor (141) in a meshed manner, and the bottom of the gear is fixedly connected with the drill rod (15) through the force bearing component (151); the drill bit (16) comprises a spiral drill bit (161), and a high-strength rock drilling bit (162) is connected to the bottom of the spiral drill bit (161).
2. A complex high and steep slope drilling device as defined in claim 1, wherein: the chassis (4) and the platform (5) both comprise two longitudinal steel pipes parallel to the sliding plate and a cross steel pipe sleeved on the longitudinal steel pipes, and the sleeve openings slide along the longitudinal steel pipes to realize the opening and closing of the cross steel pipes.
3. A complex high and steep slope drilling device as defined in claim 1, wherein: the platform (5) further comprises a front telescopic crossbeam (504) and a rear telescopic crossbeam (504).
4. A complex high and steep slope drilling device as defined in claim 1, wherein: the drilling machine support (1) further comprises a guardrail (6), the guardrail (6) comprises a left side guardrail (601), a right side guardrail (601) and a rear side guardrail (602), and the rear side guardrail (602) is a telescopic guardrail.
5. A complex high and steep slope drilling device as defined in claim 3, wherein: the drilling machine support (1) further comprises a horizontal reinforcing steel pipe (17) and a vertical reinforcing steel pipe (17), the reinforcing steel pipe (17) is driven to the interior of a rock and is subjected to high-pressure grouting, and the front telescopic cross beam (504) and the rear telescopic cross beam (504) of the platform are connected with the horizontal reinforcing steel pipe and the vertical reinforcing steel pipe through fasteners respectively.
6. A complex high and steep slope drilling device as defined in claim 1, wherein: the drill rod (15) is lengthened by adopting splicing connection and assembly.
7. A complex high and steep slope drilling device as defined in claim 1, wherein: the drill machine (2) further comprises a dismounting device, the drill bit (16) and the dismounting device are meshed with each other, and the drill rod (15) and the drill bit (16) are dismounted automatically by controlling the drill rod to rotate in the opposite direction.
8. A complex high and steep slope drilling device as defined in claim 1, wherein: and a rock drilling shell is arranged outside the cylinder (131) and is connected with the soil drilling shell through bolts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022685472.9U CN214145354U (en) | 2020-11-19 | 2020-11-19 | Drilling device for complex high and steep slope |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022685472.9U CN214145354U (en) | 2020-11-19 | 2020-11-19 | Drilling device for complex high and steep slope |
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| CN214145354U true CN214145354U (en) | 2021-09-07 |
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| CN202022685472.9U Active CN214145354U (en) | 2020-11-19 | 2020-11-19 | Drilling device for complex high and steep slope |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114541963A (en) * | 2022-03-01 | 2022-05-27 | 山东省地质矿产勘查开发局第三地质大队(山东省第三地质矿产勘查院、山东省海洋地质勘查院) | Vertical slope punching device and method for mine ecological restoration |
| CN117231133A (en) * | 2023-11-16 | 2023-12-15 | 中铁一局集团有限公司 | Side slope movable drilling platform |
-
2020
- 2020-11-19 CN CN202022685472.9U patent/CN214145354U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114541963A (en) * | 2022-03-01 | 2022-05-27 | 山东省地质矿产勘查开发局第三地质大队(山东省第三地质矿产勘查院、山东省海洋地质勘查院) | Vertical slope punching device and method for mine ecological restoration |
| CN117231133A (en) * | 2023-11-16 | 2023-12-15 | 中铁一局集团有限公司 | Side slope movable drilling platform |
| CN117231133B (en) * | 2023-11-16 | 2024-03-22 | 中铁一局集团有限公司 | Side slope movable drilling platform |
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