CN110984857B - Grouting reinforcement drilling device capable of being adjusted in two directions - Google Patents
Grouting reinforcement drilling device capable of being adjusted in two directions Download PDFInfo
- Publication number
- CN110984857B CN110984857B CN201910618363.4A CN201910618363A CN110984857B CN 110984857 B CN110984857 B CN 110984857B CN 201910618363 A CN201910618363 A CN 201910618363A CN 110984857 B CN110984857 B CN 110984857B
- Authority
- CN
- China
- Prior art keywords
- drill bit
- rod
- main
- connecting pipe
- side wall
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000005553 drilling Methods 0.000 title claims abstract description 35
- 230000002787 reinforcement Effects 0.000 title claims abstract description 22
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 16
- 239000010959 steel Substances 0.000 claims abstract description 16
- 238000007569 slipcasting Methods 0.000 claims abstract 3
- 238000010276 construction Methods 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 4
- 230000033228 biological regulation Effects 0.000 claims description 2
- 239000007787 solid Substances 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 abstract description 3
- 230000003014 reinforcing effect Effects 0.000 abstract 2
- 230000002457 bidirectional effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000002689 soil Substances 0.000 description 3
- 238000004873 anchoring Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- TVEXGJYMHHTVKP-UHFFFAOYSA-N 6-oxabicyclo[3.2.1]oct-3-en-7-one Chemical compound C1C2C(=O)OC1C=CC2 TVEXGJYMHHTVKP-UHFFFAOYSA-N 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003028 elevating effect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/04—Directional drilling
- E21B7/046—Directional drilling horizontal drilling
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/62—Drill bits characterised by parts, e.g. cutting elements, which are detachable or adjustable
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
- E21B19/08—Apparatus for feeding the rods or cables; Apparatus for increasing or decreasing the pressure on the drilling tool; Apparatus for counterbalancing the weight of the rods
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B4/00—Drives for drilling, used in the borehole
- E21B4/04—Electric drives
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B4/00—Drives for drilling, used in the borehole
- E21B4/16—Plural down-hole drives, e.g. for combined percussion and rotary drilling; Drives for multi-bit drilling units
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses a drilling device capable of being adjusted in two directions and used for grouting reinforcement, which comprises a main body support, a connecting pipe, a hydraulic rod, a drill bit rod and a connecting steel sheet, wherein the connecting pipe is sleeved inside a main drill bit and is connected with the main body support; the hydraulic stem is fixed on the inner body wall of the main drill bit, a motor is installed at one end of the hydraulic stem close to the main drill bit, and the drill bit stem is connected to one end of the motor. Traditional slip casting reinforcing drilling equipment only has a vertical drill bit, only can realize vertical or horizontal one-way drilling through the adjustment rig vertical scroll, and this but two-way slip casting reinforcing drilling equipment that adjusts has two-way drill bit in the inside hiding of drill bit on current drilling technology's basis, can control through solitary motor, can not influence vertical drill bit's normal use moreover.
Description
Technical Field
The invention relates to the technical field of grouting reinforcement related equipment, in particular to a drilling device for grouting reinforcement, which can be adjusted in two directions simultaneously.
Background
Along with the rapid development of Chinese economy, urbanization faces to the problems of dense population, traffic jam, increased energy consumption, rising house price and the like, the contradiction between the rapid expansion of urban space requirements and the limited ground space is increasingly prominent, and the requirement for space, land and resources underground becomes one of the necessary trends of the development of modern cities. The underground comprehensive pipeline corridor extends from subway traffic engineering and large buildings to the underground (underground garages and the like), develops to complex underground complexes such as underground streets, cultural sports engineering (museums, libraries, gymnasiums and art museums), underground comprehensive pipeline galleries and the like which are combined with an underground rapid rail traffic system, and then reaches underground cities. Urban underground space has become an important resource for socio-economic development.
The urban underground engineering construction has the characteristics of complex site environment conditions, high construction difficulty, high technical requirements, long construction period, high requirements on environmental influence control and the like, and particularly, the urban underground engineering construction is difficult to finely judge before excavation and revelation due to the concealment of underground engineering, geological structures, rock-soil body structures, joint crack characteristics and combination rules, underground water, underground cavities, other bad geologic bodies and the like, so that the existence of the complex factors brings huge risks to the urban underground engineering construction. Grouting and water stopping are effectively performed, and the anchoring force of the rock soil of the support anchor rod is improved, so that the underground engineering construction risk can be greatly reduced, and the method is particularly important for underground engineering construction. Most of the drilling devices for grouting reinforcement in the current market are vertical or transverse one-way drilling, and the grouting water-stopping effect and the rock-soil anchoring effect are not ideal; even if the adjustable bidirectional drilling structure is too complex, the adjustment is very troublesome, the realization is not convenient, and the use efficiency and the service life of equipment are seriously influenced. Therefore, the invention provides a technical scheme of a drilling device structure capable of adjusting in two directions for grouting reinforcement, and the technical scheme is used for solving the problems.
Disclosure of Invention
The invention aims to provide a drilling device for grouting reinforcement capable of being adjusted in two directions, and aims to solve the problems that the drilling devices for grouting reinforcement in the prior market proposed by the background technology are only used for vertical or transverse unidirectional drilling, or even the adjustable bidirectional drilling structure is too complex, the adjustment is very troublesome, the realization is not convenient, and the use efficiency and the service life of equipment are seriously influenced.
In order to solve the technical problems, the invention provides the following technical scheme: a drilling device capable of being adjusted in two directions for grouting reinforcement comprises a main body support, a connecting pipe, a hydraulic rod, a transverse drill bit, a drill bit rod, a connecting steel sheet and a main drill bit; the drill rod part of the main drill bit is of a hollow structure, the part, close to the drill bit, of the main drill bit is of a solid structure, the connecting pipe is sleeved inside the main drill bit and is connected with the main body support, a side wall hole is formed in the side wall of the main drill bit, and the hydraulic rod can extend or shorten under the hydraulic action;
the hydraulic stem is fixed on the inner body wall of the main drill bit, the transverse drill bit is provided with a drill bit rod, the end part of the hydraulic stem is provided with a motor, the transverse drill bit is connected with the motor, the drill bit rod is of a multi-section structure, and the connecting steel sheets are connected among sections of the drill bit rod so that the drill bit rod can be flexibly bent.
Preferably, the connecting pipe is of a hollow cylindrical structure, and the axis of the connecting pipe is coaxial with the axis of the main drill bit.
Preferably, two side wall holes are symmetrically formed, and the number of the transverse drill bits is 2 and the transverse drill bits are symmetrically arranged; the transverse drill bit can penetrate through the side wall hole and extend out of the side wall of the main drill bit under the pushing of the hydraulic rod, and the transverse drill bit can also retract into the main drill bit under the driving of the hydraulic rod.
Preferably, a telescopic structure is formed between the hydraulic rod and the drill bit rod, and the maximum telescopic distance of the drill bit rod does not exceed the length of the self telescopic arm of the hydraulic rod.
Preferably, the drill rod is of a multi-section structure, and all sections of the multi-section structure of the drill rod are movably connected through hinges by connecting steel sheets.
Preferably, the drilling machine further comprises a control unit, the control unit is mounted on the main body support and connected with the main drill bit, and the control unit is connected with the connecting pipe; the operation and control unit can independently and respectively control the actions of the main drill bit and the connecting pipe.
Preferably, the connecting pipe realizes elevating movement under the drive of the control unit, and the side wall hole on the main drill bit can be plugged after the connecting pipe descends.
A drilling method of a drilling device capable of being adjusted in two directions for grouting reinforcement comprises the following steps:
1) after the main body support is firmly fixed, the main drill bit is controlled by the control machine group to be lowered to a position to be worked;
2) the control unit controls the connecting pipe to ascend, so that the side wall hole is exposed after being plugged;
3) the hydraulic rod is started to drive the drill bit rod to descend, the descending drill bit rod is pushed and extruded after contacting the inner entity of the main drill bit, is bent by utilizing the connection with the connecting steel sheet, and penetrates through the side wall hole to extend out of the main drill bit;
4) at the moment, the starting motor drives the drill rod to rotate, and the drill rod can be transversely controlled to carry out drilling construction.
Compared with the prior art, the invention has the beneficial effects that: the drilling device for grouting reinforcement, which can be adjusted in two directions, comprises the following components:
1. the traditional grouting reinforcement drilling device only has one vertical drill bit and can drill holes up and down, and on the basis of the existing drilling technology, the device is provided with a bidirectional drill bit in a hidden manner, can be controlled by an independent motor and cannot influence the normal use of the vertical drill bit;
2. the side wall holes are formed in the two side wall bodies of the main drill bit and are closed through the connecting pipes when not in use, the connecting pipes are lifted when in use, and the side wall holes are formed to facilitate the transverse extension of the drill bit rod, so that the drill bit rod can be lowered to a preset depth along with the drill bit in the drill bit to perform grouting reinforcement;
3. be provided with the drill rod that can transversely control, the drill rod is driven the decline back by the hydraulic stem, can contact the inside entity of drill bit, because the drill rod is a festival and connect through connecting the steel sheet, have the activity, consequently receive after the interception just can buckle and follow the downthehole drill bit that extends of lateral wall, so that develop horizontal drilling, and the decline of drill rod is controlled by the hydraulic stem, the length that different hydraulic stems controlled is different, can carry out nimble regulation according to the demand.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the main bit of the present invention;
fig. 3 is a schematic view of the structure of the drill bit shaft of the present invention.
In the figure: 1. the main part supports, 2, horizontal drill bit, 3, main drill bit, 4, connecting pipe, 5, side wall hole, 6, hydraulic stem, 7, motor, 8, drill bit pole, 9, connection steel sheet, 10, control the unit.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1 to 3, the invention provides a drilling device for grouting reinforcement capable of being adjusted in two directions, which comprises a main body support 1, a transverse drill bit 2, a main drill bit 3, a connecting pipe 4, a side wall hole 5, a hydraulic rod 6, a motor 7, a drill bit rod 8 and a connecting steel sheet 9, wherein an operation and control unit 10 is installed on the main body support 1,
close to the main part and support 1 control unit 10 one side and install main drill bit 3, connecting pipe 4 cup joints inside main drill bit 3 and be connected with control unit 10, connecting pipe 4 sets up to the cavity cylindricly, and connecting pipe 4 is coaxial with main drill bit 3, and the shape of connecting pipe 4 can enough make connecting pipe 4 shelter from lateral wall hole 5, can not influence the installation and the use of the inside other devices of main drill bit 3 again, keeps away from and controls unit 10 set 3 has seted up lateral wall hole 5 on the main drill bit 3 one side wall, lateral wall hole 5 has seted up two, and about main drill bit 3 axis symmetry between 2 lateral wall holes 5, lateral wall hole 5 is for the extension reservation position of the drill bit pole 8 for horizontal drill bit, also restricts the extending direction of drill bit pole 8 simultaneously.
Two side wall holes 5 of the main drill bit 3 are symmetrically formed in the 180-degree direction, the number of the transverse drill bits 2 is 2, the transverse drill bits are symmetrically arranged, and the positions and the numbers of the transverse drill bits 2 and the side wall holes 5 are matched; the transverse drill bit 2 extends out of the side wall of the main drill bit 3 through the side wall hole 5 under the pushing of the hydraulic rod 6.
The working principle is as follows: when the drilling device for grouting reinforcement capable of being bidirectionally adjusted is used, firstly, the drilling device for grouting reinforcement capable of being bidirectionally adjusted needs to be moved to a proper position, then the main drill bit 3 is controlled by the control unit 10 to descend to a proper position, then the control unit 10 is used to control the connecting pipe 4 to ascend, the side wall hole 5 is exposed after being blocked, the hydraulic rod 6 is started to drive the drill bit rod 8 to descend, the descending drill bit rod 8 is pushed to be bent by utilizing the connection with the connecting steel sheet 9 after contacting the inner entity of the main drill bit 3, and penetrates through the side wall hole 5 to extend out of the main drill bit 3, at the moment, the motor 7 is started to drive the drill bit rod 8 to rotate, the drill bit rod 8 can be transversely controlled to drill the geology, this is the working process of the device and is known to the person skilled in the art without further details being described in this description.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents and modifications of some features of the invention can be made without departing from the spirit and scope of the invention.
Claims (5)
1. The utility model provides a but drilling equipment for slip casting reinforcement of two-way regulation, includes that the main part supports (1), main bit (3), connecting pipe (4), hydraulic stem (6), horizontal drill bit (2), drill bit pole (8), connects steel sheet (9) and controls unit (10), its characterized in that: the drill rod part of the main drill bit (3) is of a hollow structure, and the part, close to the drill bit, of the main drill bit (3) is of a solid structure; the connecting pipe (4) is sleeved inside the main drill bit (3) and connected to the main body support (1), a side wall hole (5) is formed in the side wall of the main drill bit (3), and the hydraulic rod (6) can extend or shorten under the hydraulic action; the hydraulic rod (6) is fixed on the inner body wall of the main drill bit (3), the transverse drill bit (2) is provided with a drill bit rod (8), the end of the hydraulic rod (6) is provided with a motor, the transverse drill bit (2) is connected with the motor, the drill bit rod (8) is of a multi-section structure, and the connecting steel sheet (9) is connected among sections of the drill bit rod (8) so that the drill bit rod (8) can be flexibly bent;
the connecting pipe (4) is of a hollow cylindrical structure, and the axis of the connecting pipe (4) is coaxial with the axis of the main drill bit (3);
the control unit (10) is arranged on the main body support (1), the control unit (10) is connected with the main drill bit (3), and the control unit (10) is connected with the connecting pipe (4); the control unit (10) can independently and respectively control the actions of the main drill bit (3) and the connecting pipe (4);
the connecting pipe (4) is driven by the control unit (10) to move up and down, and the side wall hole (5) on the main drill bit (3) can be plugged after the connecting pipe (4) descends.
2. The drilling device for grouting reinforcement capable of being adjusted bidirectionally of claim 1, wherein: the two side wall holes (5) are symmetrically formed, and the number of the transverse drill bits (2) is 2 and the transverse drill bits are symmetrically arranged; the transverse drill bit (2) penetrates through the side wall hole (5) and extends out of the side wall of the main drill bit (3) under the pushing of the hydraulic rod (6).
3. The drilling device for grouting reinforcement capable of being adjusted bidirectionally of claim 1, wherein: and a telescopic structure is formed between the hydraulic rod (6) and the drill bit rod (8), and the maximum telescopic distance of the drill bit rod (8) does not exceed the length of the self telescopic arm of the hydraulic rod (6).
4. The drilling device for grouting reinforcement capable of being adjusted bidirectionally of claim 1, wherein: the sections of the multi-section structure of the drill rod (8) are movably connected by connecting steel sheets (9) through hinges.
5. The drilling method of the drilling device for grouting reinforcement capable of being adjusted bidirectionally according to claim 1, characterized by comprising the following steps:
1) after the main body support (1) is firmly fixed, the main drill bit (3) is controlled by the control unit (10) to be lowered to a position to be worked;
2) the control unit (10) controls the connecting pipe (4) to ascend, so that the side wall hole (5) is exposed after being plugged;
3) the hydraulic pressure rod (6) is started to drive the drill bit rod (8) to descend, the descending drill bit rod (8) is pushed and extruded to be bent by utilizing the connection with the connecting steel sheet (9) after contacting the inner entity of the main drill bit (3), and penetrates through the side wall hole (5) to extend out of the main drill bit (3);
4) at the moment, the starting motor (7) drives the drill rod (8) to rotate, and the drill rod (8) can be transversely controlled to carry out drilling construction on the geology.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910618363.4A CN110984857B (en) | 2019-01-08 | 2019-07-10 | Grouting reinforcement drilling device capable of being adjusted in two directions |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920027922 | 2019-01-08 | ||
| CN201920027922X | 2019-01-08 | ||
| CN201910618363.4A CN110984857B (en) | 2019-01-08 | 2019-07-10 | Grouting reinforcement drilling device capable of being adjusted in two directions |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110984857A CN110984857A (en) | 2020-04-10 |
| CN110984857B true CN110984857B (en) | 2021-01-29 |
Family
ID=70108503
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910618363.4A Active CN110984857B (en) | 2019-01-08 | 2019-07-10 | Grouting reinforcement drilling device capable of being adjusted in two directions |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110984857B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114000830B (en) * | 2022-01-04 | 2022-03-01 | 烟台集纳智能科技有限公司 | Grouting reinforcement drilling device capable of being adjusted in two directions |
| CN114151006B (en) * | 2022-02-08 | 2022-04-19 | 徐州宏朗机械制造有限公司 | Dust fall stage drilling device convenient to position adjustment in mine tunnel |
| CN114875888B (en) * | 2022-06-11 | 2024-06-18 | 一山(北京)岩土工程有限公司 | Grouting reinforcement device and reinforcement method for miniature steel pipe pile |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100333024B1 (en) * | 1999-09-16 | 2002-04-17 | 곽효남 | Grouting Horizontal directional drilling method |
| CN102134967B (en) * | 2011-01-25 | 2012-01-18 | 煤炭科学研究总院西安研究院 | Construction method of consolidating horizontal directional drilling hole by grouting coal seam baseboard |
| CN105888549B (en) * | 2015-06-26 | 2018-01-19 | 山东科技大学 | A kind of boring BHA of km depth L-type pre grouting from the surface and bore process |
| CN106639871A (en) * | 2017-03-15 | 2017-05-10 | 西安同兴石油设备技术有限公司 | Horizontal well reservoir reformation equipment and reformation method thereof |
| CN107806321A (en) * | 2017-11-10 | 2018-03-16 | 丁向峰 | Material saving Optimization-type concrete stake machine |
| CN108071344B (en) * | 2017-12-13 | 2019-07-02 | 中国矿业大学 | A kind of deformation coal heavy caliber is at well bidirectional reciprocating drilling three-step core drill tool and boring method |
-
2019
- 2019-07-10 CN CN201910618363.4A patent/CN110984857B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN110984857A (en) | 2020-04-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110984857B (en) | Grouting reinforcement drilling device capable of being adjusted in two directions | |
| CN109024651B (en) | Steel pipe concrete mixed pile foundation and construction method | |
| CN105298463A (en) | Completion method for natural-gas-hydrate large-borehole and multi-branch-radial-horizontal-borehole well | |
| CN104265164B (en) | The creeping into draw to dig of plateau mountain foundation pit excavation construction equipment carries native device | |
| CN203584444U (en) | Efficient and simple roofbolter | |
| CN104265156B (en) | The drawing to dig of plateau mountain foundation pit excavation construction equipment carries native device | |
| CN104196072B (en) | Plateau mountain foundation pit excavation construction equipment | |
| CN103306283B (en) | A kind of method improving nonmetal anti-float anchor rod shear strength | |
| CN103134236A (en) | Construction method of tilted burying of underground heat exchanger of ground source heat pump | |
| CN105618812B (en) | A kind of device for rectifying a deviation to building in small space | |
| CN114060036A (en) | Horizontal positioning grouting reinforcement construction process suitable for municipal construction of silt soft soil stratum | |
| CN106761494A (en) | A kind of guider and method for tunnel pre-grouting armature boring | |
| CN110439353A (en) | A kind of erection construction method of concrete wire pole overturning-preventing | |
| CN106930768A (en) | Tunnel Construction and application | |
| CN201183950Y (en) | Self-propelling type anchor rod of seamless steel pipe | |
| CN205605114U (en) | Karst karst area prestressed anchorage cable drilling equipment | |
| CN101858196A (en) | Low gravity center three-axle spiral drilling machine and drilling method thereof | |
| CN206539323U (en) | A kind of guider for tunnel pre-grouting armature boring | |
| CN115839437A (en) | Underground rain sewage pipeline jacking pipe construction method | |
| CN107762400B (en) | Underground engineering hole pile driving construction is with moving forward and backward formula low clearance drilling machine | |
| CN205688441U (en) | A kind of casing bit pulling out anchor cable | |
| CN201339315Y (en) | Wall-connecting device of attached self-lifting scaffold | |
| CN211873804U (en) | Concrete building template for civil engineering | |
| CN209652925U (en) | A kind of ground anchored structure | |
| CN211113654U (en) | Steel construction foundation ditch strutting arrangement for construction |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: 266100 No.73, Keyuan Weisi Road, Laoshan District, Qingdao, Shandong Province Applicant after: Qingdao Geological Engineering Survey Institute (Qingdao geological exploration and Development Bureau) Applicant after: QINGDAO GEOLOGICAL MINING ROCK AND SOIL ENGINEERING Co.,Ltd. Address before: 266000 No. 181 Jiaozhou East Road, Qingdao City, Shandong Province Applicant before: QINGDAO GEOLOGICAL ENGINEERING INVESTIGATION INSTITUTE Applicant before: QINGDAO GEOLOGICAL MINING ROCK AND SOIL ENGINEERING Co.,Ltd. |
|
| CB02 | Change of applicant information | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |