CN106968686A - A kind of pipe shed construction method - Google Patents
A kind of pipe shed construction method Download PDFInfo
- Publication number
- CN106968686A CN106968686A CN201710192699.XA CN201710192699A CN106968686A CN 106968686 A CN106968686 A CN 106968686A CN 201710192699 A CN201710192699 A CN 201710192699A CN 106968686 A CN106968686 A CN 106968686A
- Authority
- CN
- China
- Prior art keywords
- pipe
- steel pipe
- drilling
- construction method
- inclination angle
- 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.)
- Pending
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/003—Linings or provisions thereon, specially adapted for traffic tunnels, e.g. with built-in cleaning devices
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
Abstract
The invention discloses a kind of pipe shed construction method, comprise the following steps：1), hole section；2) point location, is bored：According to the installation site of the size design steel pipe of construction tunnel, line label is entered to penstock installation position, the installation site on tunnel top is labeled as 0#, then left and right sides symmetrical marks are 1#~N#；3), drill for the first time：Azimuth and inclination angle that rig enters hole are adjusted, 0# and odd number # are then got into by designated length using rig；4), first time borehole cleaning：Impurity in drilling is removed；5), first time penstock installation：Steel pipe is inserted in 0# and odd number # drillings；6), second of drilling：The inclination angle that rig enters hole is adjusted, even number # is got into by designated length using rig；7), second of borehole cleaning：Impurity in drilling is removed；8), second of penstock installation：By in steel pipe insertion even number # drillings.The present invention solves existing pipe shed construction method and is easily caused the problem of supporting effect is relatively low.
Description
Technical field
The present invention relates to constructing tunnel equipment technical field, and in particular to a kind of pipe shed construction method.
Background technology
Barrel vault advanced support is exactly that one group of steel pipe is squeezed into stratum along along the hole that oneself is drilled outside outline excavation, and and steel arch
Frame combines to form powerful frame pre support reinforcement system, and supporting comes from the load on Guan Peng tops, passes through the quincunx of steel pipe
The injected hole of arrangement pressurizes the slip casting into stratum, to reinforce the stratum of weak broken, improves the self-stable ability on stratum.Pipe shed support
Following effect can be played：
(1) camber effect：The pipe canopy arranged in advance, using face and posterior support as fulcrum, forms a girder structure,
The two constitutes the shell-like structure around tunnel profile, can effectively suppress wall rock loosening and collapse.
(2) annular groove effect：The explosion wave that face explosion is produced is propagated and the intensive ring of pipe canopy is met in detonation gas extension
Reflected, absorbed or diffraction after shape hole slot, greatly reduce the surrounding rock failure degree and range of disturbance caused by negative drawing ripple.
(3) construction safety is ensured：Pipe shed support rigidity is larger, is such as caved in during construction, and quarrel of collapsing is also to fall on pipe canopy
In portion's rock quarrel, cushioning effect is played, even if pipe canopy unstability, its destruction is also slower.
The reasonability of the installation of pipe canopy is to the construction important in inhibiting of subsequent tunnel, therefore, rational pipe roof construction side
Method is particularly important.At present, to be easily caused supporting effect relatively low for existing pipe shed construction method.
The content of the invention
It is an object of the invention to provide a kind of pipe shed construction method, solve existing pipe shed construction method and be easily caused supporting effect
Really relatively low the problem of.
The present invention is achieved through the following technical solutions：
A kind of pipe shed construction method, comprises the following steps：
1), hole section：Longitudinal terminal surface is formed in the end in tunnel；
2) point location, is bored：According to the installation site of the size design steel pipe of construction tunnel, rower is entered to penstock installation position
Number, the installation site on tunnel top is labeled as 0#, then left and right sides symmetrical marks are 1#~N#；
3), drill for the first time：Azimuth and inclination angle that rig enters hole are adjusted, then 0# and odd number # is bored using rig
Hole drill is to designated length；
4), first time borehole cleaning：Impurity in 0# and odd number # drillings is removed；
5), first time penstock installation：Steel pipe is inserted in 0# and odd number # drillings, then steel pipe is fixed using flange；
6), second of drilling：Azimuth and inclination angle that rig enters hole are adjusted, then even number # is drilled using rig and bored
To designated length；
7), second of borehole cleaning：Impurity in even number # drillings is removed；
8), second of penstock installation：By in steel pipe insertion even number # drillings, then steel pipe is fixed using flange.
At present, in the construction method of tunneltron canopy, it is first determined the quantity of steel pipe, rower then is entered to installation site
Number, then installation site is drilled one by one, steel pipe is then being installed one by one.Such mounting means, due in hole clipping
During, the bore inner accomplished fluently before does not have filler, causes the structural stability of whole system poor, when continuation drills
When, under the larger impetus of rig intensity, to cause the rock stratum of drilling surrounding to loosen, and then reduce the supporting effect of pipe canopy
Really.
Tunnel cross-section of the present invention specifically refers to be arranged on tunnel ends, for the section of drilling, the longitudinal terminal surface
The end face is specifically referred to perpendicular to horizontal plane；The installation site of the size design steel pipe according to construction tunnel is specifically referred to
School, the quantity of rational deployment steel pipe, the selection of steel pipe sizes, and the spacing between steel pipe are arrived according to tunnel；It is described to install
The curved arrangement of arcwall of the position along tunnel, the installation site of the left and right sides is with the center line on the vertical direction in tunnel
It is symmetrical set, the azimuth specifically refers to drilling rod and deviates from horizontal central line (level when people is just to rig in the horizontal direction
Upper sight) angle；The inclination angle specifically refers to the angle of inclination of drilling rod, i.e. angle of inclination after penstock installation during drilling；Enter
And adjust rig and enter azimuth and inclination angle specific time in hole and ajust drilling rod level, then it is adjusted to suitable in vertical direction
Inclination angle, i.e. drilling rod are laid flat rearward end and moved up along horizontal line of sight makes drilling rod be formed an angle at (inclination angle) with horizontal plane shape；Institute
State flange preferably with steel-pipe welding, for by steel pipe be fastened on drilling in.
The present invention is easy to drill to installation site in batches, it is to avoid during drilling by entering line label to installation site
Generation is obscured, and the present invention is drilled, installs steel pipe in batches by interval, can be reduced to greatest extent in boring procedure to rock
The influence of Rotating fields stability, then improves pipe shed support effect, in this way, to solve existing pipe shed construction method easy by the present invention
Cause the problem of supporting effect is relatively low.
Further, the spacing of installation site between any two is 3~5 times of outer diameter of steel pipes.
Specifically, the spacing between any two specifically refers to the arc distance between adjacent drilling.
The spacing of drilling and the size of steel pipe can influence the supporting effect of pipe canopy to a certain extent.
Steel pipe is divided into small pipe shed, middle pipe canopy and long pipe shed by caliber, and the caliber of the small pipe shed typically exists
In the range of, use caliber forSteel pipe, pipe range is advisable with 3.5-5m；The caliber of middle pipe canopy typically existsIn the range of, pipe range is usually no more than 20m, and the caliber of steel tube shed typically existsIn the range of, often
Use caliberPipe range no more than 40m to be advisable.
Applicant is had found by long-term construction test：The spacing of installation site between any two is set to outer diameter of steel pipes
3~5 times be conducive to improve pipe canopy supporting effect.
Further, 150 ° of angles are formed between 2 steel pipes of bottom.
Specifically, the angle specifically refers to the angle between the center of 2 steel pipes and the tunnel line of centres.
Applicant is had found by long-term construction test：The above-mentioned angular range combination rational deployment steel pipe (size of light pipe
And the spacing between adjacent drilling) be conducive to the further supporting effect for improving pipe canopy.
Further, inclination angle is 1 °~15 °, wherein, the inclination angle of small pipe shed is 5~15 °, the inclination angle of middle pipe canopy for 2 °~
8 °, the inclination angle of long pipe shed is 1 °~3 °.
According to the pipe diameter size reasonable set inclination angle of pipe canopy (steel pipe), be conducive to the supporting effect of senior executive's canopy.
Applicant is had found by long-term construction test：Inclination angle is too small, it would be possible to causes pipe canopy distal end to hang down to tunnel and opens
Dig influence construction in later period in territory；On the contrary, inclination angle is excessive, pipe canopy leaves digging territory apart from excessive, the triangle soil body below pipe canopy
Cave in and bring very big difficulty to tunnel cutting supporting.
The setting at inclination angle corresponding to the pipe canopy of above-mentioned different tube diameters not be at will can set, be that applicant passes through length
The construction experience of phase is obtained.
Further, the determination that point location carries out penstock installation position using total powerstation non-prism three-dimensional coordinate is bored.
Specifically, the total powerstation non-prism three-dimensional coordinate is prior art, concrete operations：Using total powerstation non-prism three
Dimension coordinate carries out pipe canopy and bores point setting-out, and arbitrfary point three-dimensional coordinate is first measured near aperture, and point is bored with theoretical according to measuring point pile No.
Pile No. is poor, measuring point and center line offset distance, it is theoretical bore point and center line offset distance, the horizontal subangle at Guan Peng inclination angles, vertical subangle etc., calculate
The three-dimensional coordinate of actual face layout point, carries out pipe roof construction setting-out, solves irregular section pipe canopy and bores point location problem,
Greatly improve setting-out speed and the setting-out degree of accuracy.
Further, drilling rod front end is accurately located in surveying and locating point position during drilling, and rig rear end is according to three
Dimension coordinate measurement data strictly adjusts horizontal subangle and vertical subangle.
Specifically, the three-dimensional coordinate measurement is prior art.
The present invention carries out pipe canopy by using total powerstation non-prism three-dimensional coordinate and bores point setting-out, solves irregular section pipe
Canopy bores point location problem, and setting-out is accurate；Control rig in place and drilling using three dimensions, it is ensured that pipe canopy squeezes into angle precision.
Further, angle and drilling direction are measured using inclinometer during drilling.
Specifically, the inclinometer is prior art.To avoid drilling rod and drill bit because deadweight is sagging or runs into boulder drilling
The phenomenon such as direction is whard to control, bore angle can be appropriately adjusted according to geological conditions and drilling situation, and use inclinometer at any time
Angle measurement and drilling direction.
Further, steel pipe is installed using pipe-following drilling construction technology.
Specifically, the pipe-following drilling construction technology is prior art, specific using the construction of down-hole hammer drilling with casing
Technique send pipe.
Concrete operations are as follows：Pipe canopy is given in down-the-hole air hammer jerk center bit during drilling, center bit transmission impact
Drill bit simultaneously drives pipe boron steel pipe bit to rotate drilling, by the length being threadedly coupled to needed for drilling between every pipe canopy, pipe canopy and
Rotary motive power head is connectionless, and impactor couples with interior drilling rod, and the length needed for interior drilling rod is connected to drilling passes through in connector
Screw thread is connected with rotary motive power head, and rotary motive power head transfers torque to pipe canopy and drilling rod by connector, and deslagging during drilling leads to
The gap discharge of Guan Peng and interior drilling rod is crossed, when drilling is to required length, 90 degree of drilling rod can be by center bit in reverse rotation
Separate, interior drilling rod is all taken out outside hole, you can stay in pipe canopy in hole with pipe canopy drill bit.
The present invention compared with prior art, has the following advantages and advantages：
1st, the present invention is easy to drill to installation site in batches by entering line label to installation site, it is to avoid drilling
When produce and obscure, the present invention is drilled by interval, installs steel pipe in batches, and it is right in boring procedure to reduce to greatest extent
The influence of strata structure stability, then improves pipe shed support effect.
2nd, the present invention rationally designs the spacing between adjacent drilling by the position of rational deployment steel pipe, and according to pipe
The Sizes design inclination angle of canopy, further increases the supporting effect of pipe canopy to a certain extent.
Brief description of the drawings
Accompanying drawing described herein is used for providing further understanding the embodiment of the present invention, constitutes one of the application
Point, do not constitute the restriction to the embodiment of the present invention.In the accompanying drawings：
Fig. 1 is the complete layout of steel pipe；
Fig. 2 is the structural representation in steel pipe insertion drilling.
Mark and corresponding parts title in accompanying drawing：
1- steel pipes.
Embodiment
For the object, technical solutions and advantages of the present invention are more clearly understood, with reference to embodiment and accompanying drawing, to this
Invention is described in further detail, and exemplary embodiment and its explanation of the invention is only used for explaining the present invention, does not make
For limitation of the invention.
Embodiment 1：
As shown in Figure 1 and Figure 2, a kind of pipe shed construction method, comprises the following steps：
1), hole section：Longitudinal terminal surface is formed in the end in tunnel,；
2) point location, is bored：According to the installation site of the size design steel pipe 1 of construction tunnel, penstock installation position is carried out
Label, by the installation site on tunnel top be labeled as 0#, then left and right sides symmetrical marks be 1#~N#, installation site two-by-two it
Between spacing be that 150 ° of angles are formed between 3~5 times of the external diameter of steel pipe 1,2 steel pipes 1 of bottom, the inclination angle is 1 °~
15 °, wherein, the inclination angle of small pipe shed is 5~15 °, and the inclination angle of middle pipe canopy is 2 °~8 °, and the inclination angle of long pipe shed is 1 °~3 °, described
Bore the determination that point location carries out the installation site of steel pipe 1 using total powerstation non-prism three-dimensional coordinate；
3), drill for the first time：Azimuth and inclination angle that rig enters hole are adjusted, then 0# and odd number # is bored using rig
Hole drill is to designated length, and drilling rod front end is accurately located in surveying and locating point position during drilling, and rig rear end is according to three-dimensional
Measurement of coordinates data strictly adjust horizontal subangle and vertical subangle, and angle and drilling are measured using inclinometer during drilling
Direction；
4), first time borehole cleaning：Impurity in 0# and odd number # drillings is removed；
5), first time steel pipe 1 is installed：Steel pipe 1 is inserted in 0# and odd number # drillings, then steel pipe 1 is fixed using flange,
Steel pipe 1 is installed using pipe-following drilling construction technology；
6), second of drilling：Azimuth and inclination angle that rig enters hole are adjusted, then even number # is drilled using rig and bored
To designated length, drilling rod front end is accurately located in surveying and locating point position during drilling, and rig rear end is according to three-dimensional coordinate
Measurement data strictly adjusts horizontal subangle and vertical subangle, using inclinometer measurement angle and drilling side during drilling
To；
7), second of borehole cleaning：Impurity in even number # drillings is removed；
8), second of steel pipe 1 is installed：Steel pipe 1 is inserted in even number # drillings, then steel pipe 1 is fixed using flange, steel pipe 1
Installed using pipe-following drilling construction technology.
Above-described embodiment, has been carried out further to the purpose of the present invention, technical scheme and beneficial effect
Describe in detail, should be understood that the embodiment that the foregoing is only the present invention, be not intended to limit the present invention
Protection domain, within the spirit and principles of the invention, any modification, equivalent substitution and improvements done etc. all should be included
Within protection scope of the present invention.
Claims (8)
1. a kind of pipe shed construction method, it is characterised in that comprise the following steps：
1), hole section：Longitudinal terminal surface is formed in the end in tunnel；
2) point location, is bored：According to the installation site of the size design steel pipe (1) of construction tunnel, rower is entered to penstock installation position
Number, the installation site on tunnel top is labeled as 0#, then left and right sides symmetrical marks are 1#~N#；
3), drill for the first time：Azimuth and inclination angle that rig enters hole are adjusted, then 0# and odd number # drillings are bored using rig
To designated length；
4), first time borehole cleaning：Impurity in 0# and odd number # drillings is removed；
5), first time steel pipe (1) is installed：Steel pipe (1) is inserted in 0# and odd number # drillings, then steel pipe (1) is consolidated using flange
It is fixed；
6), second of drilling：Azimuth and inclination angle that rig enters hole are adjusted, even number # is then got into by finger using rig
Measured length；
7), second of borehole cleaning：Impurity in even number # drillings is removed；
8), second of steel pipe (1) is installed：By in steel pipe (1) insertion even number # drillings, then steel pipe (1) is fixed using flange.
2. a kind of pipe shed construction method according to claim 1, it is characterised in that the installation site between any two between
Away from 3~5 times for steel pipe (1) external diameter.
3. a kind of pipe shed construction method according to claim 1, it is characterised in that shape between 2 steel pipes (1) of bottom
Into 150 ° of angles.
4. a kind of pipe shed construction method according to claim 1, it is characterised in that the inclination angle is 1 °~15 °, wherein,
The inclination angle of small pipe shed is 5~15 °, and the inclination angle of middle pipe canopy is 2 °~8 °, and the inclination angle of long pipe shed is 1 °~3 °.
5. a kind of pipe shed construction method according to claim 1, it is characterised in that the brill point location is exempted from using total powerstation
Prism three-dimensional coordinate carries out the determination of steel pipe (1) installation site.
6. a kind of pipe shed construction method according to claim 1, it is characterised in that drilling rod front end is accurate during drilling
Surveying and locating point position is really located in, rig rear end strictly adjusts horizontal subangle and vertical subangle according to three-dimensional coordinate measurement data.
7. a kind of pipe shed construction method according to claim 1, it is characterised in that inclinometer is used during drilling
Measure angle and drilling direction.
8. a kind of pipe shed construction method according to claim 1, it is characterised in that steel pipe (1) is constructed using pipe-following drilling
Technique is installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710192699.XA CN106968686A (en) | 2017-03-28 | 2017-03-28 | A kind of pipe shed construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710192699.XA CN106968686A (en) | 2017-03-28 | 2017-03-28 | A kind of pipe shed construction method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106968686A true CN106968686A (en) | 2017-07-21 |
Family
ID=59335610
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710192699.XA Pending CN106968686A (en) | 2017-03-28 | 2017-03-28 | A kind of pipe shed construction method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106968686A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108104840A (en) * | 2017-12-14 | 2018-06-01 | 中铁四局集团有限公司 | Cobble accumulation horizon tunnel Shed-pipe Advanced Support drills emptying aperture slip casting hole forming method and application one by one |
| CN109736823A (en) * | 2018-11-30 | 2019-05-10 | 中铁十六局集团第一工程有限公司 | A kind of more work surface construction methods of large cross-section tunnel super-front large pipe shed |
| CN111472801A (en) * | 2020-04-09 | 2020-07-31 | 中铁二十三局集团第一工程有限公司 | Construction method for passing existing line under shallow-buried underground excavation drainage gallery |
| CN115183743A (en) * | 2022-06-28 | 2022-10-14 | 中国五冶集团有限公司 | Tunnel deformation monitoring system and method for tilt sensor |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6520718B1 (en) * | 1998-11-27 | 2003-02-18 | Shigeki Nagatomo, Et Al. | Sardine-bone construction method for large-section tunnel |
| CN104314585A (en) * | 2014-10-15 | 2015-01-28 | 中国神华能源股份有限公司 | Pre-reinforcement method and pre-reinforcement structure for full section of tunnel |
| CN204646251U (en) * | 2015-04-29 | 2015-09-16 | 中铁第一勘察设计院集团有限公司 | The shield end reinforcement system of a kind of land pebble stratum super-front large pipe shed |
| CN105484751A (en) * | 2015-02-04 | 2016-04-13 | 中铁隧道勘测设计院有限公司 | Method for preventing large-section rectangular pipe-jacking tunnel from generating soil loading phenomenon |
-
2017
- 2017-03-28 CN CN201710192699.XA patent/CN106968686A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6520718B1 (en) * | 1998-11-27 | 2003-02-18 | Shigeki Nagatomo, Et Al. | Sardine-bone construction method for large-section tunnel |
| CN104314585A (en) * | 2014-10-15 | 2015-01-28 | 中国神华能源股份有限公司 | Pre-reinforcement method and pre-reinforcement structure for full section of tunnel |
| CN105484751A (en) * | 2015-02-04 | 2016-04-13 | 中铁隧道勘测设计院有限公司 | Method for preventing large-section rectangular pipe-jacking tunnel from generating soil loading phenomenon |
| CN204646251U (en) * | 2015-04-29 | 2015-09-16 | 中铁第一勘察设计院集团有限公司 | The shield end reinforcement system of a kind of land pebble stratum super-front large pipe shed |
Non-Patent Citations (1)
| Title |
|---|
| 孙振: "围岩锚注加固技术的应用研究", 《建筑工程》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108104840A (en) * | 2017-12-14 | 2018-06-01 | 中铁四局集团有限公司 | Cobble accumulation horizon tunnel Shed-pipe Advanced Support drills emptying aperture slip casting hole forming method and application one by one |
| CN109736823A (en) * | 2018-11-30 | 2019-05-10 | 中铁十六局集团第一工程有限公司 | A kind of more work surface construction methods of large cross-section tunnel super-front large pipe shed |
| CN111472801A (en) * | 2020-04-09 | 2020-07-31 | 中铁二十三局集团第一工程有限公司 | Construction method for passing existing line under shallow-buried underground excavation drainage gallery |
| CN115183743A (en) * | 2022-06-28 | 2022-10-14 | 中国五冶集团有限公司 | Tunnel deformation monitoring system and method for tilt sensor |
| CN115183743B (en) * | 2022-06-28 | 2023-12-26 | 中国五冶集团有限公司 | Inclination sensor tunnel deformation monitoring system and method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106968686A (en) | A kind of pipe shed construction method | |
| CN107842368B (en) | City tunnel Drilling mills the non-quick-fried excavation technology of mechanical combination | |
| CN102134965B (en) | Long positioned drill hole drilling tool for extracting gas from coal seam roof and construction method thereof | |
| CN105064982B (en) | Coal field ground hole is accurately oriented to target spot in underworkings docks equipment and method | |
| EP2559842B1 (en) | A method of directing vertical drillings | |
| CN104482815A (en) | Tunnel smooth blasting method | |
| CN105201406A (en) | High-accuracy pipeline construction technology of horizontal spiral drill | |
| CN101387198A (en) | Monitoring method for drilled wellbore trajectories | |
| CN101260784A (en) | Tunnel advanced support air circulated drilling construction method and drilling tool | |
| CN104481398A (en) | Three-dimensional (3D) horizontal well drilling construction method | |
| CN105649012A (en) | Construction method for bored pile of subway station enclosure structure of upper-soft lower-hard ground | |
| CN114035239B (en) | Comprehensive investigation method for deep-buried long tunnel | |
| CN105888549B (en) | A kind of boring BHA of km depth L-type pre grouting from the surface and bore process | |
| CN106285776A (en) | A kind of unrestrained method of roof water based on Technology of Directional Drilling | |
| CN107084648A (en) | One kind uses pilot hole guide-localization and Smooth Blasting Construction method | |
| CN111058819B (en) | Method for covering hard top plate on hydraulic fracturing treatment working face | |
| CN202467828U (en) | Laser drilling and locating instrument | |
| US8011447B2 (en) | Automated drill string position survey | |
| CN103104289A (en) | Mine water disaster treatment method | |
| CN202659146U (en) | Double-drilling combined drill structure suitable for drilling operation of oil well and horizontal well | |
| CN111005379A (en) | Construction method for removing pile body of reinforced concrete cast-in-place pile | |
| CN107461208B (en) | A kind of contact pipeline well and construction method on inclined orebody | |
| CN110847809A (en) | Pile foundation pore-forming method next to underground structure | |
| CN103835647A (en) | Method for drilling floating pebble bed | |
| JP2017025618A (en) | Advanced boring method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170721 |