CN201883935U - Pore-forming drill tool for advance support of tunneling works - Google Patents
Pore-forming drill tool for advance support of tunneling works Download PDFInfo
- Publication number
- CN201883935U CN201883935U CN2010206940183U CN201020694018U CN201883935U CN 201883935 U CN201883935 U CN 201883935U CN 2010206940183 U CN2010206940183 U CN 2010206940183U CN 201020694018 U CN201020694018 U CN 201020694018U CN 201883935 U CN201883935 U CN 201883935U
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- China
- Prior art keywords
- drill
- advance
- pore
- advance support
- condulet
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Abstract
The utility model discloses a pore-forming drill tool for the advance support of tunneling works, which belongs to the technical field of effective pore forming of an advance grouting condulet in a soft stratum or a cataclastically or loosely structured rock mass of a tunnel. The drill tool comprises a drill bit and a drill rod, wherein the drill bit is connected with the front end of the drill rod, and a hand pneumatic drill is connected with the rear end of the drill rod. The drill tool adopts the key technology that the drill rod is sleeved by the advance condulet. The drill tool well solves the difficult problem of the pore forming of the advance condulet in the soft stratum, totally guarantees the pore forming rate of the advance condulet, achieves good wall protection performance and high drilling efficiency, ensures the quality of the advance support construction, greatly avoids the overbreak and collapse of a crown position in the next cycle due to insufficient advance support, and remarkably accelerates the construction progress.
Description
Technical field
The utility model belongs to the device in the construction of tunnel advance support making hole construction technical field, especially at the drilling tool in the effective hole creating technology of the pre-grouting ductule field in tunnel soft stratum or cracked, the loose structure rock mass.
Background technology
The pre-grouting ductule utilizes and self combines the frame effect that forms with profile steel frame, and reaches soft stratum or consolidation cracked, loose structure rock mass relaxation zone by body slip casting, can be good at realizing the tunnel advanced support construction.But in tunnel soft stratum or cracked, loose structure rock mass, bit freezing very easily appears in the pore-creating of pre-grouting ductule, the hole phenomenon of collapsing, pore-forming is very difficult, restricted the realization of pre-grouting ductule construction quality and leading consolidation to a great extent, and occur next circulation crown position phenomenon of backbreaking, collapse easily, obviously contain construction speed.
Summary of the invention
Problem to be solved in the utility model is exactly that a kind of drilling tool that leading ductule becomes porosity that can improve in the soft stratum is provided at above deficiency.Its technical scheme is as follows:
It comprises drill bit and drilling rod, and the drilling rod front end connects drill bit, and the rear end connects the hand air drill, and its key technology is the leading ductule of suit on drilling rod.
The beneficial effect that compared with prior art the utlity model has is:
1, the utility model utilizes the principle that the wedge shape off-balance bit is just changeing expansion, reversing and dwindle, leading ductule is removed tail cone, be enclosed within on the drilling rod as following pipe, creep into to design length, the counter-rotating drill bit, with withdrawing from drilling rod and drill bit under the retaining wall effect of pipe smoothly to reach the purpose of leading ductule pore-forming, well solved the difficult problem of leading ductule pore-forming in the soft stratum, guaranteed the one-tenth porosity of leading ductule fully, the retaining wall performance is good, drilling efficiency is high, and the quality of advance support construction is guaranteed.
2, because the quality of advance support construction can be guaranteed, avoided to a great extent owing to the not enough phenomenon of backbreaking, collapse that next circulation crown position occurs of advance support, construction speed obviously gets a promotion.
3, the leading ductule pore-creating time of single cycle has shortened 3 hours adopting on 5.5 hours the basis of former boring method (3 hand air drill pore-creating simultaneously, pore-creating rice number has been in 44 * 4.5m), the saving pore-creating time 54%.
Description of drawings:
Fig. 1 is the utility model structural representation;
Fig. 2 is the leading ductule structural representation of the utility model;
Fig. 3 is the utility model virtual calibrator for instrument transformer structural representation;
Fig. 4 is the utility model eccentric bushing structural representation;
Fig. 5 is the utility model drill bit structure schematic diagram.
The specific embodiment:
Referring to Fig. 1-Fig. 5, the utility model comprises drill bit and drilling rod 5, and drilling rod 5 front ends connect drill bit, and the rear end connects hand air drill 1, and its key technology is the leading ductule 3 of suit on drilling rod 5.Virtual calibrator for instrument transformer 6 is installed between drill bit and drilling rod 5, and drill bit is selected wedge shape off-balance bit 8 for use, and wedge shape off-balance bit 8 is installed on the virtual calibrator for instrument transformer 6 by eccentric bushing 7.
Among the figure, 2 are the hoop of putting more energy into, and 4 is injected hole, and 9 is the tail cone of leading ductule.
Leading ductule of the present utility model, wedge shape off-balance bit, eccentric bushing, virtual calibrator for instrument transformer all adopt leading ductule, wedge shape off-balance bit, eccentric bushing, the virtual calibrator for instrument transformer of prior art.
The utility model course of work is as follows:
When 1, boring work began, eccentric bushing 7 screwed out along center wedge shape off-balance bit 8, begins reaming simultaneously and advances simultaneously to guarantee leading ductule 3 and drilling system;
2, after leading ductule 3 creeps into and puts in place, counter-rotating carefully, eccentric bushing 7 cycles can be extracted wedge shape off-balance bit 8 smoothly from leading ductule 3.
Claims (3)
1. a construction of tunnel advance support pore-creating drilling tool comprises drill bit and drilling rod (5), and drilling rod (5) front end connects drill bit, and the rear end connects hand air drill (1), it is characterized in that going up the leading ductule of suit (3) at drilling rod (5).
2. according to the described construction of tunnel advance support of claim 1 pore-creating drilling tool, it is characterized in that between drill bit and drilling rod (5), virtual calibrator for instrument transformer (6) being installed.
3. according to the described construction of tunnel advance support of claim 2 pore-creating drilling tool, it is characterized in that drill bit selects wedge shape off-balance bit (8) for use, wedge shape off-balance bit (8) is installed on the virtual calibrator for instrument transformer (6) by eccentric bushing (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206940183U CN201883935U (en) | 2010-12-31 | 2010-12-31 | Pore-forming drill tool for advance support of tunneling works |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206940183U CN201883935U (en) | 2010-12-31 | 2010-12-31 | Pore-forming drill tool for advance support of tunneling works |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201883935U true CN201883935U (en) | 2011-06-29 |
Family
ID=44181475
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206940183U Expired - Lifetime CN201883935U (en) | 2010-12-31 | 2010-12-31 | Pore-forming drill tool for advance support of tunneling works |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201883935U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112228081A (en) * | 2020-10-24 | 2021-01-15 | 中铁一局集团有限公司 | Method for reinforcing pile foundation of shield tunnel side-through high-speed rail viaduct |
-
2010
- 2010-12-31 CN CN2010206940183U patent/CN201883935U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112228081A (en) * | 2020-10-24 | 2021-01-15 | 中铁一局集团有限公司 | Method for reinforcing pile foundation of shield tunnel side-through high-speed rail viaduct |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110629 |