CN213869711U - Construction is with doing pore-forming rig in narrow and small space - Google Patents
Construction is with doing pore-forming rig in narrow and small space Download PDFInfo
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- CN213869711U CN213869711U CN202022611432.XU CN202022611432U CN213869711U CN 213869711 U CN213869711 U CN 213869711U CN 202022611432 U CN202022611432 U CN 202022611432U CN 213869711 U CN213869711 U CN 213869711U
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Abstract
The utility model discloses a dry pore-forming drilling machine for construction in a narrow space, which comprises a walking system and a pore-forming system, wherein the pore-forming system is arranged at one end of the walking system and is provided with a walking state and a working state; the traveling system comprises a traveling chassis, a hydraulic station, a winch and an undercarriage; the pore-forming system comprises a main frame, a power head, a pile casing driver, a pile casing, a drill rod and a drill bit, wherein the main frame is movably connected to a walking chassis, the power head is arranged in the main frame and connected with a winch through a connecting rope, the power head and an undercarriage are connected with a hydraulic station, the pile casing driver is arranged on the lower portion of the power head, the pile casing is connected to the lower portion of the pile casing driver, the drill rod and the drill bit are arranged in the pile casing, and the drill bit is arranged at the bottom end of the drill rod. The utility model discloses a protect the segmentation setting of a section of thick bamboo and drilling rod, reduced the demand of body frame to the height to the construction mode through preceding drilling rod drilling back follow-up protects a section of thick bamboo, manifold cycles has realized carrying out mechanized pile driving operation in narrow and small space in the underground tunnel.
Description
Technical Field
The utility model relates to a construction technical field, concretely relates to construction is with doing pore-forming rig in narrow and small space.
Background
The pile driver is special equipment in pile foundation construction, plays an important role in the field of engineering construction, and is widely applied to engineering construction of foundation improvement of various buildings, house construction, transportation, water conservancy flood prevention, environmental protection, offshore drilling platforms, wind power generation and the like at present. In recent years, with the rapid development of underground engineering construction, the number of piles formed in a tunnel in underground engineering, particularly a subway underground excavation station, is more and more, but the pile forming mode is single, and most of the piles adopt manual hole digging piles. However, the manual hole digging pile has the defects of low construction efficiency, poor operation environment, poor safety performance, high labor cost and the like, the requirement of modern mechanized construction cannot be met, and a great safety risk exists in the hole digging process. Therefore, Beijing requires the manual hole pile digging operation in underground excavation station holes built in cities to be completely stopped from 2019, 4 and 20 months, and requires to be replaced by hole pile mechanical construction.
Because the basis of pile foundation is dark, pile shaft length is long, in order to realize the needs of pore-forming, pile driver multi-frame establishes on ground, and the promotion of drilling rod, the transfer of steel reinforcement cage and the driving of precast pile are realized to cooperation pile driver frame to because ground high altitude and have not too much barrier, for satisfying the long requirement of stake and being convenient for construct, ground pile has generally set up higher pile driver frame. For such narrow space of the underground excavation station, a high pile driving frame cannot be placed, so that contradiction occurs between the operation space of the existing site and the construction space required by pile driving.
The following methods are generally adopted in pile foundation engineering, and although the application ranges of the methods are different, the requirements of pore forming in an underground tunnel cannot be completely met:
the slurry wall protection pore-forming comprises positive and negative circulation pore-forming, rotary drilling pore-forming and diving drilling pore-forming. The method is characterized in that no matter which drilling machine is adopted, a mud pit must be built before the hole forming operation, and the mud is ensured to continuously circulate on the hole wall in the drilling process of the drilling machine so as to maintain the stability of the hole wall. However, the construction site with narrow underground cannot provide a required working space for the mud pit, if the mud pit is arranged on the ground and then conveyed to the underground through a pipeline, the underground station is deep, the method is not economical, and a large amount of mud generated in the construction process also pollutes the construction environment.
The full-casing pore-forming generally comprises a rotary pore-forming and a vibrating pore-forming, wherein the vibrating pore-forming can generate certain vibration influence on peripheral soil bodies, the underground soil bodies are unstable due to excavation in underground engineering, a powerful support measure is needed to ensure safe excavation, the stability of the soil bodies in an excavation range can be further influenced by extra and additional vibration, the safety of an underground cavern is influenced, and the full-casing pore-forming is not suggested to be used. In contrast, the rotary hole forming effect is much smaller, but the length of the sleeve used at present is too long to meet the requirement of underground cavern construction.
And thirdly, dry operation pore-forming, including manual hole digging, spiral drilling and rotary drilling pore-forming, is generally suitable for cohesive soil, silt, filled soil, sandy soil with more than medium compactness and weathered rock stratum above underground water level or after precipitation, wherein the manual hole digging has high requirements on anhydrous or less water environment and has higher requirements on the stability of soil body.
In summary, the conventional pile driver cannot operate in a narrow space underground, cannot meet the high safety control requirement of underground works, and partially has the influence of noise, vibration, waste water and the like on the surrounding environment. The utility model provides a construction is with doing pore-forming rig in narrow and small space and solves above-mentioned problem.
SUMMERY OF THE UTILITY MODEL
The utility model provides a construction is with doing pore-forming rig in narrow and small space realizes doing the pore-forming operation in the narrow and small space in the underground, has the characteristics that the security performance is high, environmental pollution is little and the efficiency of construction is high.
The utility model provides a technical scheme that above-mentioned technical problem adopted is:
a dry hole-forming drilling machine for construction in a narrow space comprises a traveling system and a hole-forming system, wherein the hole-forming system is arranged at one end of the traveling system and is provided with a traveling state and a working state; the traveling system comprises a traveling chassis, a hydraulic station, a winch and an undercarriage, wherein the hydraulic station, the winch and the undercarriage are all arranged on the traveling chassis; pore-forming system includes body frame, unit head, protects a section of thick bamboo driver, protects a section of thick bamboo, drilling rod and drill bit, body frame swing joint is on the walking chassis to be connected with the undercarriage, the unit head is established in the body frame, is connected with the winch through connecting the rope, unit head and undercarriage are connected with the hydraulic pressure station, it establishes in the unit head lower part to protect a section of thick bamboo driver to keep the same motion with the unit head, protect a section of thick bamboo and connect and protect a section of thick bamboo driver lower part, drilling rod and drill bit are located and protect a section of thick bamboo, the drill bit is established in the drilling rod bottom, the drilling rod top is connected with protecting a section of thick bamboo driver.
Furthermore, the power head comprises a power seat and a connector, the power seat is arranged in the main frame, and the connector is arranged at the bottom of the power seat; the protective cylinder driver comprises a first connecting seat and a second connecting seat, the first connecting seat is fixedly connected with the connecting head, and the second connecting seat is located on the lower side of the first connecting seat.
Furthermore, the protective cylinder comprises protective cylinder unit sections, the upper end and the lower end of each protective cylinder unit section are respectively provided with an inner ring joint and an outer ring joint, the inner ring joints and the outer ring joints of the adjacent protective cylinder unit sections are connected in a sleeved mode, and the inner ring joints of the protective cylinder unit sections at the top end are fixedly connected with the second connecting seat.
Furthermore, a connecting plate is arranged on the outer wall of the inner ring joint, connecting grooves are formed in the inner walls of the outer ring joint and the connecting seat II, and the connecting plate is located in the connecting grooves; the inner ring joint and the outer ring joint are provided with corresponding connecting holes, the connecting holes are arranged at intervals along the circumferential direction of the pile casing, and bolts are arranged in the connecting holes.
And furthermore, the drill rod comprises drill rod units, adjacent drill rod units are connected through a pin shaft, the drill rod unit positioned at the top end is fixedly connected with the second connecting seat, and the drill rod unit positioned at the bottom end is fixedly connected with the drill bit.
Further, the drill bit comprises a rod body, a drill plate and drill teeth, the drill plate is arranged at the bottom end of the rod body, and the drill teeth are arranged on the drill plate at intervals.
Furthermore, the walking chassis comprises a walking base, a rotary table and supporting legs, wherein the rotary table and the supporting legs are connected to the walking base.
Furthermore, the main frame comprises a main frame body, a first pin shaft seat and a second pin shaft seat, the first pin shaft seat is arranged on the upper portion of the main frame body and connected with the top end of the undercarriage, and the second pin shaft seat is arranged on the lower portion of the main frame body and connected with the outer end of the rotary table.
Furthermore, a fixed wheel is arranged on the main frame body, a lifting wheel is arranged on the power head, and the connecting rope bypasses the fixed wheel and is connected with the lifting wheel; the main frame is provided with a slide rail in the length direction, the power head is provided with a pulley, and the pulley is arranged on the slide rail and moves along the slide rail.
The utility model discloses beneficial effect as follows:
the section arrangement of the pile casing and the drill rod reduces the height requirement of the main frame, and the mechanized piling operation in a narrow space in the underground tunnel is realized through the construction mode of firstly drilling the drill rod, then following the pile casing and circulating for many times; the construction method of assembling the casing section by section replaces the traditional slurry wall protection mode, has the characteristics of energy conservation and environmental protection, and can flexibly adapt to narrow underground space; the method has the characteristics of high safety performance, small environmental pollution and high construction efficiency.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention;
fig. 2 is a top view of the overall structure of the present invention;
fig. 3 is a schematic structural view of the main frame of the present invention;
fig. 4 is a schematic structural view of the power head of the present invention;
fig. 5 is a schematic structural view of the casing driver of the present invention;
FIG. 6 is a schematic structural view of a casing unit segment of the present invention;
FIG. 7 is a schematic view of the drill rod structure of the present invention;
fig. 8 is a schematic view of the drill according to the present invention.
Reference numerals: 1-a walking chassis, 110-a walking base, 120-a turntable, 130-a supporting leg, 2-a hydraulic station, 3-a winch, 4-an undercarriage, 5-a main frame, 51-a main frame body, 52-a pin shaft seat I, 53-a pin shaft seat II, 54-a fixed wheel, 6-a power head, 61-a power seat, 62-a connecting head, 63-a lifting wheel, 7-a casing driver, 71-a connecting seat I, 72-a connecting seat II, 8-a casing, 81-an inner ring joint, 82-an outer ring joint, 83-a connecting plate, 84-a connecting groove, 85-a connecting hole, 9-a drill rod, 10-a drill bit, 101-a rod body, 102-a drill plate, 103-a drill tooth and 11-a connecting rope.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are only some embodiments, not all embodiments, of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of this patent, it is to be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for the convenience of describing the patent and for the simplicity of description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the patent.
As shown in fig. 1 and 2, a dry hole-forming drilling machine for construction in a narrow space comprises a traveling system and a hole-forming system, wherein the hole-forming system is arranged at one end of the traveling system and is provided with a traveling state and a working state; the traveling system comprises a traveling chassis 1, a hydraulic station 2, a winch 3 and an undercarriage 4, wherein the hydraulic station 2, the winch 3 and the undercarriage 4 are all arranged on the traveling chassis 1; pore-forming system includes body frame 5, unit head 6, protects a section of thick bamboo driver 7, protects a section of thick bamboo 8, drilling rod 9 and drill bit 10, 5 swing joint of body frame are on walking chassis 1 to be connected with undercarriage 4, unit head 6 is established in body frame 5, is connected with winch 3 through connecting rope 11, unit head 6 and undercarriage 4 are connected with hydraulic pressure station 2, protect a section of thick bamboo driver 7 and establish in 6 lower parts of unit head to keep the same motion with unit head 6, protect a section of thick bamboo 8 and connect in protecting a section of thick bamboo driver 7 lower part, drilling rod 9 and drill bit 10 are located and protect a section of thick bamboo 8, drill bit 10 is established in drilling rod 9 bottom, drilling rod 9 top and protect a section of thick bamboo driver 7 to be connected.
The principle of the utility model is as follows: in a narrow underground space, as no larger space is constructed on the ground, the absolute height of the structure needs to be reduced for construction, the pile casing 8 consists of pile casing unit sections, and the drill rod 9 consists of drill rod units; during construction, the power head 6 is connected to the main frame 5 and can move up and down along the main frame, the casing protection driver 7 is connected with the power head 6, the drill rod unit and the casing protection unit section are sequentially and circularly connected to the casing protection driver 7, and the drilling operation, the casing protection unit section advancing ruler, the drill rod unit drilling operation and the casing protection unit section advancing ruler are sequentially and circularly operated under the action of downward and rotary rotating force provided by the power head 6 until the hole forming operation is realized; and after the hole forming operation is finished, splitting according to the reverse operation sequence.
As shown in fig. 4 and 5, further, the power head 6 includes a power seat 61 and a connector 62, the power seat 61 is disposed in the main frame 5, and the connector 62 is disposed at the bottom of the power seat 61; the pile casing driver 7 comprises a first connecting seat 71 and a second connecting seat 72, wherein the first connecting seat 71 is fixedly connected with the connecting head 62, and the second connecting seat 72 is positioned on the lower side of the first connecting seat 71.
Further, the connector 62 of the power base 61 has the functions of extension and rotation, and can drive the casing driver 7 to move up and down and rotate.
As shown in fig. 6, further, the casing 8 includes casing unit segments, the upper and lower ends of each casing unit segment are respectively provided with an inner ring joint 81 and an outer ring joint 82, the inner ring joint 81 and the outer ring joint 82 of adjacent casing unit segments are connected in a sleeved manner, and the inner ring joint 81 of the casing unit segment at the top end is fixedly connected with the second connecting seat 72.
As shown in fig. 6, further, a connecting plate 83 is arranged on the outer wall of the inner ring joint 81, a connecting groove 84 is arranged on the inner walls of the outer ring joint 82 and the second connecting seat 72, the connecting plate 83 is located in the connecting groove 84, and the connecting plate 83 and the connecting groove 84 are matched to perform positioning, limiting and fixing alignment functions; the inner ring joint 81 and the outer ring joint 82 are provided with corresponding connecting holes 85, the connecting holes 85 are arranged at intervals along the circumferential direction of the casing 8, and bolts are arranged in the connecting holes 85.
The connection between the pile casing unit sections and the pile casing driver 7 is sleeved on an inner ring joint 81 of the pile casing unit sections through a second connecting seat 72 to be connected, and the adjacent pile casing unit sections are sleeved on an inner ring joint 81 of the lower pile casing unit section through an outer ring joint 82 of the upper pile casing unit section to be connected, so that the pile casings 8 are formed through one-by-one connection.
Furthermore, a hoisting hole is arranged on the inner ring joint 81 of the pile casing unit section. The lifting device is used for lifting and moving the pile casing unit after the pile casing unit is pulled out.
Preferably, the length of the casing unit section is 1 m. Construction in the underground narrow space is convenient to carry out.
The connection mode between the pile casing unit sections is as follows: the inner ring joint 81 of the lower pile casing unit section is tightly sleeved by the outer ring joint 82 of the upper pile casing unit section, meanwhile, the connecting plate 83 on the outer wall of the inner ring joint 81 is positioned on the corresponding connecting groove 84 on the inner wall of the outer ring joint 82 to be clamped, and then bolts are used for penetrating through the connecting holes 85 on the inner ring joint 81 and the outer ring joint 82 to sequentially connect the pile casing unit sections.
As shown in fig. 7, further, the drill rod 9 includes drill rod units, adjacent drill rod units are connected by a pin, the drill rod unit at the top end is fixedly connected with the second connecting seat 72, and the drill rod unit at the bottom end is fixedly connected with the drill bit 10 by a pin.
Further, as shown in fig. 8, the drill bit 10 comprises a shaft 101, a drill plate 102 and drill teeth 103, wherein the drill plate 102 is arranged at the bottom end of the shaft 101, and the drill teeth 103 are arranged on the drill plate 102 at intervals.
Preferably, the drill plate 102 is a V-shaped steel plate, five drill teeth 103 are welded to two sides of the V-shaped steel plate, and the drill teeth 103 are excavator bucket teeth. The digging machine is used for digging the soil body by shaking the teeth, so that the drilling efficiency is effectively improved.
Preferably, the drill rod 9 comprises a rod body and helical blades, the helical blades are arranged on the rod body, the helical blades of adjacent drill rods 9 are in butt joint with each other, and the rod body 101 of the drill bit 10 is provided with helical blades and is in butt joint with the helical blades on the drill rod 9.
As shown in fig. 1, further, the walking chassis 1 includes a walking base 110, a turntable 120 and legs 130, and the turntable 120 and the legs 130 are connected to the walking base 110.
As shown in fig. 3, the main frame 5 further includes a main frame body 51, a first pin shaft seat 52 and a second pin shaft seat 53, the first pin shaft seat 52 is disposed on the upper portion of the main frame body 51 and connected to the top end of the landing gear 4, and the second pin shaft seat 53 is disposed on the lower portion of the main frame body 51 and connected to the outer end of the turntable 120. When the undercarriage 4 retracts, the main frame 5 is in a horizontal posture in a walking state, so that the transportation is facilitated; after the main frame 5 reaches a construction site, the undercarriage 4 extends out, the horizontal posture of the main frame 5 in a walking state is adjusted to the vertical posture of the main frame in a working state, and the main frame is convenient to move in a narrow underground space.
As shown in fig. 3, further, a fixed wheel 54 is arranged on the main frame 51, a lifting wheel 63 is arranged on the power head 6, and the connecting rope 11 is connected with the lifting wheel 63 by bypassing the fixed wheel 54; the main frame 5 is provided with a slide rail in the length direction, the power head 6 is provided with a pulley, and the pulley is arranged on the slide rail and moves along the slide rail. The pulley block formed by the fixed wheel 54 and the lifting wheel 63 plays a role of lifting the power head 6, and the vertical motion of the power head 6 is realized by the cooperation of the pulley and the slide rail.
A construction method of a dry hole-forming drilling machine for construction in a narrow space comprises the following steps:
s1, embedding an orifice casing: manually excavating a 1m deep hole at the pile position, and putting a pile casing unit section after performing concrete wall protection on the pile hole;
s2, positioning a drilling machine: moving the drilling machine to a drilling position, aligning the drilling machine with a hole forming position, and unfolding the hole forming system from a horizontal walking state to a vertical working state;
aligning the main frame 5 to the center of the hole, connecting the power head 6 with the connecting rope 11, then lifting the power head 6, and connecting the power head 6 with the pile casing driver 7 in place;
s3, the bit is in position: installing a drill bit 10 on the casing driver 7, then drilling the drill bit 10 into an inner hole of the casing unit joint, and then disconnecting the drill bit 10 from the casing driver 7 and reserving the drill bit in the hole;
s4, drilling a drill rod: lifting the casing driver 7, installing a drill rod unit, connecting the drill rod unit with a drill bit 10 in a hole, drilling, and disconnecting the drill rod unit from the casing driver 7 and reserving the drill rod unit in the hole after drilling for a drill rod unit depth;
s5, casing drilling: lifting the casing driver 7, installing casing unit sections, connecting the casing unit sections with the casing unit sections in the hole, drilling, and after drilling one casing unit section, disconnecting the second casing unit section from the casing driver 7 and reserving the second casing unit section in the hole;
s6, continuous drilling: performing continuous construction sequentially and circularly and alternately according to the drilling rod drilling in the step S3 and the pile casing drilling in the step S4 until the drill rod is drilled to the designed position;
s7, equipment dismantling: and (4) dismantling the equipment according to the reverse order of the drilling operation, completing the dismantling of the equipment and checking and accepting the formed hole.
Further, in the drilling process, the muck is excavated through the helical blade on the outer side of the rod body.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, and any reference signs in the claims are not intended to be construed as limiting the claim concerned.
Claims (7)
1. A dry hole-forming drilling machine for construction in a narrow space is characterized by comprising a traveling system and a hole-forming system, wherein the hole-forming system is arranged at one end of the traveling system and is provided with a traveling state and a working state; the travelling system comprises a travelling chassis (1), a hydraulic station (2), a winch (3) and an undercarriage (4), wherein the hydraulic station (2), the winch (3) and the undercarriage (4) are all arranged on the travelling chassis (1); the pore-forming system comprises a main frame (5), a power head (6), a pile casing driver (7), a pile casing (8), a drill rod (9) and a drill bit (10), wherein the main frame (5) is movably connected to the walking chassis (1), and is connected with the undercarriage (4), the power head (6) is arranged in the main frame (5), is connected with a winch (3) through a connecting rope (11), the power head (6) and the undercarriage (4) are connected with the hydraulic station (2), the pile casing driver (7) is arranged at the lower part of the power head (6), and keeps the same movement with the power head (6), the protective cylinder (8) is connected with the lower part of the protective cylinder driver (7), the drill rod (9) and the drill bit (10) are positioned in the casing (8), the drill bit (10) is arranged at the bottom end of the drill rod (9), and the top end of the drill rod (9) is connected with the casing driver (7);
the power head (6) comprises a power seat (61) and a connector (62), the power seat (61) is arranged in the main frame (5), and the connector (62) is arranged at the bottom of the power seat (61); the pile casing driver (7) comprises a first connecting seat (71) and a second connecting seat (72), the first connecting seat (71) is fixedly connected with the connecting head (62), and the second connecting seat (72) is positioned on the lower side of the first connecting seat (71);
the walking chassis (1) comprises a walking base (110), a rotary table (120) and supporting legs (130), wherein the rotary table (120) and the supporting legs (130) are connected to the walking base (110).
2. The dry hole-forming drill for construction in a narrow space as claimed in claim 1, wherein: the protective cylinder (8) comprises protective cylinder unit sections, the upper end and the lower end of each protective cylinder unit section are respectively provided with an inner ring joint (81) and an outer ring joint (82), the inner ring joints (81) and the outer ring joints (82) of the adjacent protective cylinder unit sections are mutually connected in a sleeved mode, and the inner ring joints (81) of the protective cylinder unit sections on the top end are fixedly connected with the second connecting seat (72).
3. The dry hole-forming drill for construction in a narrow space as claimed in claim 2, wherein: a connecting plate (83) is arranged on the outer wall of the inner ring joint (81), connecting grooves (84) are formed in the inner walls of the outer ring joint (82) and the connecting seat II (72), and the connecting plate (83) is located in the connecting grooves (84); the inner ring joint (81) and the outer ring joint (82) are provided with corresponding connecting holes (85), the connecting holes (85) are arranged at intervals along the circumferential direction of the protective cylinder (8), and bolts are arranged in the connecting holes.
4. The dry hole-forming drill for construction in a narrow space as claimed in claim 2, wherein: the drill rod (9) comprises drill rod units, adjacent drill rod units are connected through a pin shaft, the drill rod unit positioned at the top end is fixedly connected with the second connecting seat (72), and the drill rod unit positioned at the bottom end is fixedly connected with the drill bit (10).
5. The dry hole-forming drill for construction in a narrow space as claimed in claim 2, wherein: the drill bit (10) comprises a rod body (101), a drill plate (102) and drill teeth (103), wherein the drill plate (102) is arranged at the bottom end of the rod body (101), and the drill teeth (103) are arranged on the drill plate (102) at intervals.
6. The dry hole-forming drill for construction in a narrow space as claimed in claim 1, wherein: the main frame (5) comprises a main frame body (51), a first pin shaft seat (52) and a second pin shaft seat (53), wherein the first pin shaft seat (52) is arranged on the upper portion of the main frame body (51) and connected with the top end of the undercarriage (4), and the second pin shaft seat (53) is arranged on the lower portion of the main frame body (51) and connected with the outer end of the rotary table (120).
7. The dry hole-forming drill for construction in a narrow space as claimed in claim 6, wherein: the main frame body (51) is provided with a fixed wheel (54), the power head (6) is provided with a lifting wheel (63), and the connecting rope (11) bypasses the fixed wheel (54) and is connected with the lifting wheel (63); the main frame (5) is provided with a slide rail in the length direction, the power head (6) is provided with a pulley, and the pulley is arranged on the slide rail and moves along the slide rail.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202022611432.XU CN213869711U (en) | 2020-11-12 | 2020-11-12 | Construction is with doing pore-forming rig in narrow and small space |
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| CN202022611432.XU CN213869711U (en) | 2020-11-12 | 2020-11-12 | Construction is with doing pore-forming rig in narrow and small space |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112554783A (en) * | 2020-11-12 | 2021-03-26 | 北京建工土木工程有限公司 | Dry hole-forming drilling machine for construction in underground narrow space and construction method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112554783A (en) * | 2020-11-12 | 2021-03-26 | 北京建工土木工程有限公司 | Dry hole-forming drilling machine for construction in underground narrow space and construction method |
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