CN102182399B - Construction method and equipment for reverse circulation drill to drill hole, hammer to form hole, expand hole and remove slag - Google Patents
Construction method and equipment for reverse circulation drill to drill hole, hammer to form hole, expand hole and remove slag Download PDFInfo
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- CN102182399B CN102182399B CN 201110108765 CN201110108765A CN102182399B CN 102182399 B CN102182399 B CN 102182399B CN 201110108765 CN201110108765 CN 201110108765 CN 201110108765 A CN201110108765 A CN 201110108765A CN 102182399 B CN102182399 B CN 102182399B
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Abstract
The invention discloses a construction method and construction equipment for a reverse circulation drill to drill a hole, hammer to form the hole, expand the hole and remove slag. A power head drives a drill rod to drill the hole; an impact hammer provided with a reaming device hammers to form the hole, and the hole is expanded by a reaming hammer; the drill rod of the drill is connected with a guiding slag removing pipe of an impact reaming hammer; and sediments at the bottom of the hole are sucked out by a drilling mud pump, and then discharged into a movable sediment separation pool by the drill rod and riprapped at the pile bottom to form a cushion layer. The invention has the advantages that: the reverse circulation drill is combined with the impact hammer, so the reverse circulation drill has high drilling speed and strong rock embedding capability; the reverse circulation drill is combined with the guiding slag removing pipe of the reaming hammer so as to hammer while removing the slag, and the slag can be removed finally; the impact hammer is combined with the reaming hammer to form an expanded head, a ratio of the diameter of the expanded bottom end surface to the section of the pipe body is increased, so the bearing capability of the single pipe is effectively improved; and the reverse circulation drill is combined with impact reaming hammer so as to drill, ream, remove slag and riprap, and the functions are shared; the movable sediment separation pool can separate the sludge cakes and sediments and transport the sludge cakes and sediments out of the field, so the mud is prevented from polluting the environment.
Description
Technical field
What the present invention relates to is job practices and the equipment thereof of clean-out machine boring, hammering pore-forming, reaming, scarfing cinder, belongs to technical field of building construction.
Background technology
Along with development and national economy, all kinds of civilian and industrial construction move towards high stratification day by day, and castinplace pile obtains the approval of many designing units, Construction unit with its distinctive large bearing capacity advantage.Really be a kind of economic and practical base form.
Be subjected to the influence of factors such as building construction types, load distribution situation, geological conditions, construction equipment and execution conditions, the selection of stake type is very limited, especially running into when comprising the higher unfavorable geological condition of mud or groundwater table such as mucky soil or drift sand formation, according to all kinds of soil compaction stakes or the non-soil compaction pile-formation process of doing at present wet method, common have pile tube, preformed pile, bored pile, a hole digging pile etc.
Though advantages such as pile tube, the stake of tubular type side, preformed pile tool batch production production, construction speed piece wherein.But that its defective is the soil compaction pile capacity is low, the stake end can not be squeezed into hard soil layer and lithosphere, the hammering noise is big during injection, easily swell on ground around the stake, cause adjacent stake come-up in place, the difficult control of pile extension welding quality, antidetonation, resistance to plucking, resistance to corrosion are poor, broken pile appears easily, be not suitable for highrise building especially building life greater than 50 years and antidetonation greater than the building more than 7 grades, be only applicable to low-level common buildings engineering and use; The advantage of hole digging pile is the bearing capacity height, and its resistance to plucking, shearing resistance and resistance to corrosion are better, and its defective is: the degree of depth of stake hole in the drift sand mud is greater than 16 meters, and it is not high that the workman hollows out the job safety coefficient; The bored pile advantage is the bearing capacity height, its resistance to plucking, shearing resistance and resistance to corrosion are better than other types, the basis that is widely used in buildings such as high-rise civil building, bridge, road, water conservancy, but it is slow that its defective is speed of application, sediment of the hole bottom is easy-clear not, and end resistance reduces, and influences bearing capacity of single pile, construction cost raises, and has restricted application and the development of bored pile.
Summary of the invention
The present invention proposes be a kind of clean-out machine boring, hammering, expansion at the bottom of, job practices and the equipment thereof of scarfing cinder, its purpose is intended to overcome the above-mentioned defective of existing in prior technology, improve existing construction equipment and technology thereof, increase jump bit and the scarfing cinder pipe that has Counterboring apparatus at the reverse circulation drilling bored concrete pile foundation, make advantages such as it has construction safety, work efficiency height, quality height, construction technology is easy to operate, construction cost is easy to control.Thereby widen under unfavorable geological condition, the stake type design alternative of all kinds of construction works realizes efficient, high-quality, low cost and personal security construction.
Technical solution of the present invention: the job practices of clean-out machine boring, hammering pore-forming, reaming, scarfing cinder, this method comprises following construction sequence:
One, unit head drives drilling rod boring, after rig boring reaches desired depth, removes drilling rod, uses the jump bit that has Counterboring apparatus instead;
Two, the jump bit hammering pore-forming that has Counterboring apparatus, and with the reaming of reaming hammer to designing the aperture;
Three, borer drill rod is connected with the guiding scarfing cinder pipe that impacts the reaming hammer, carries out the scarfing cinder operation by the scarfing cinder pipe, the reaming of stake end can increase the stake end and enlarge unit head bearing stratum area; In the reaming of stake end, be thrown into stone, with in the stone hammering underground layer, carry out the pile operation with jump bit again; Behind the reaming jackstone piece, make stake end soil layer and the acting in conjunction of jackstone stake end concrete, improve bearing capacity of pile tip;
Four, utilize the rig slush pump with the hole at the bottom of the sediment sucking-off, enter portable sediment separate tank by drilling rod, and at the bottom of stake jackstone, form bed course.
Described reaming mainly utilizes the hammering reaming to hammer into shape to finish, and when jump bit was hammered onto designated depth, by rope hoisting jump bit and reaming hammer, the reaming hammer slided up and down at jump bit by slideway, the final stake end enlarged footing that forms.
Described scarfing cinder mainly utilizes clean-out machine suction with the sucking-off of stake inner hole deposition slag, drilling rod links to each other with guiding scarfing cinder pipe in the jump bit, side hammer hits the limit scarfing cinder, after reaming is finished, stake inner hole deposition slag is all removed the most at last, and the jackstone bed course, institute's sucking-off sediment transports by portable sediment separate tank separation simultaneously.
Clean-out machine boring, the hammering pore-forming, reaming, the construction equipment of scarfing cinder, structure comprises walking-type pile driver, the A hoist engine, the B hoist engine, the unit head track, unit head, drilling rod, the jump bit that has Counterboring apparatus, portable sediment separate tank, the scarfing cinder pipe, the stake hole, jackstone piece bed course, portal frame, wherein A hoist engine and B hoist engine are installed on the walking-type pile driver, the B hoist engine links to each other with unit head by wire rope, unit head links to each other with drilling rod, unit head slides to reach at the unit head track and fixes, the unit head slideway links to each other with walking-type pile driver, the A hoist engine links to each other with the jump bit that has Counterboring apparatus by wire rope, the scarfing cinder pipe links to each other with portable sediment separate tank, portal frame links to each other with the jump bit that has Counterboring apparatus by wire rope, the jump bit that has Counterboring apparatus is positioned at a hole, and jackstone piece bed course is positioned at a bottom, hole.
The structure that has the jump bit of Counterboring apparatus comprises jump bit, reaming hammer, slidably guiding scarfing cinder pipe is hammered in reaming hammer hammer body, reaming hammer slideway, reaming into shape, wherein reaming hammer slideway adheres on the slidably reaming hammer hammer body and slides, the reaming hammer links to each other with jump bit, and reaming hammer guiding scarfing cinder pipe is positioned in the middle of the jump bit.Reaming hammer guiding scarfing cinder pipe links to each other with the scarfing cinder pipe.
Advantage of the present invention: advantages such as it has construction safety, work efficiency height, quality height, construction technology is easy to operate, construction cost is easy to control.Widen under unfavorable geological condition, the stake type design alternative of all kinds of construction works realizes efficient, high-quality, low cost and personal security construction.1. clean-out machine is combined with jump bit, has that penetration rate is fast, embedding rock ability is strong; The jackstone bed course can be driven in the soil layer, and force the extrusion packing building stones to bearing stratum horizontal plane and bottom, make it enter density and the intensity of improving bearing course at pile end in the hardpan thereby ram stone because of jump bit; 2. clean-out machine and reaming hammer guiding scarfing cinder duct ligation closes, and side hammer hits the limit scarfing cinder, can cooperate last scarfing cinder with rig; 3. the combination of jump bit and reaming hammer forms enlarged footing, expands bottom face diameter and pile body cross section ratio and increases, and effectively improves bearing capacity of single pile, reduces building costs, guarantees the pile foundation engineering quality; 4. clean-out machine is hammered combination into shape with impacting reaming, can accomplish boring, reaming, scarfing cinder, jackstone, realizes function sharing, and the performance sharpest edges promote operating efficiency; 5. portable sediment separate tank can transport the place with the separation of clod sediment, avoids the mud contamination environment.
Description of drawings
Accompanying drawing 1 is clean-out machine boring schematic diagram.
Accompanying drawing 2 is clean-out machine hammering reaming schematic diagrames.
Accompanying drawing 3 is clean-out machine scarfing cinder schematic diagrames.
Accompanying drawing 4 is stake end jackstone schematic diagrames.
Accompanying drawing 5 is to impact the reaming hammer to promote state diagram.
Accompanying drawing 6 is to impact reaming hammer reaming state diagram.
Accompanying drawing 7 is to have Counterboring apparatus jump bit plan view.
Accompanying drawing 8 is reaming hammering device slideway schematic diagrames.
In the accompanying drawing 1 is walking-type pile driver, the 2nd, and A hoist engine, the 3rd, B hoist engine, the 4th, unit head track, the 5th, unit head, the 6th, drilling rod, the 7th, jump bit, the 7-1 that has Counterboring apparatus are that jump bit, 7-2 are that reaming hammer, 7-2-1 are that slidably reaming hammer hammer body, 7-2-2 are reaming hammer slideway, 7-3 reaming hammer guiding scarfing cinder pipe, the 8th, portable sediment separate tank, the 9th, scarfing cinder pipe, the 10th, a hole, the 11st, jackstone piece bed course, the 12nd, portal frame.
The specific embodiment
Contrast accompanying drawing 1, its structure comprises walking-type pile driver 1, A hoist engine 2, B hoist engine 3, unit head track 4, unit head 5, drilling rod 6, wherein A hoist engine 2 and B hoist engine 3 are installed on the walking-type pile driver 1, B hoist engine 3 links to each other with unit head 5 by wire rope, unit head 5 links to each other with drilling rod 6, unit head 5 slides at unit head track 4, and unit head slideway 4 links to each other with walking-type pile driver 1.
Contrast accompanying drawing 2, its structure comprises walking-type pile driver 1, A hoist engine 2, B hoist engine 3, unit head track 4, unit head 5, has the jump bit 7 of Counterboring apparatus, wherein A hoist engine 2 and B hoist engine 3 are installed on the walking-type pile driver 1, B hoist engine 3 links to each other with unit head 5 by wire rope, A hoist engine 2 links to each other with the jump bit 7 that has Counterboring apparatus by wire rope, unit head 5 is fixing at unit head track 4, and unit head slideway 4 links to each other with walking-type pile driver 1.
Contrast accompanying drawing 3, its structure comprises walking-type pile driver 1, A hoist engine 2, B hoist engine 3, unit head track 4, unit head 5, the jump bit 7 that has Counterboring apparatus, portable sediment separate tank 8, scarfing cinder pipe 9, wherein A hoist engine 2 and B hoist engine 3 are installed on the walking-type pile driver 1, B hoist engine 3 links to each other with unit head 5 by wire rope, A hoist engine 2 links to each other with the jump bit 7 that has Counterboring apparatus by wire rope, unit head 5 is fixing at unit head track 4, unit head slideway 4 links to each other with walking-type pile driver 1, scarfing cinder pipe 9 links to each other with the jump bit 7 that has Counterboring apparatus, and scarfing cinder pipe 9 links to each other with portable sediment separate tank 8.
Contrast accompanying drawing 4, its structure comprises jump bit 7, scarfing cinder pipe 9, stake hole 10, jackstone piece bed course 11, the portal frame 12 that has Counterboring apparatus, wherein portal frame 12 links to each other with the jump bit 7 that has Counterboring apparatus by wire rope, the jump bit 7 that has Counterboring apparatus is positioned at a hole 10, scarfing cinder pipe 9 links to each other with the jump bit 7 that has Counterboring apparatus, and jackstone piece bed course 11 is positioned at 12 bottoms, a hole.
Contrast accompanying drawing 5, Fig. 6, its structure comprises jump bit 7-1, slidably guiding scarfing cinder pipe 7-3 is hammered in reaming hammer hammer body 7-2-1, reaming hammer slideway 7-2-2, reaming into shape, wherein reaming hammer slideway 7-2-2 links to each other with jump bit 7-1, slidably reaming hammer hammer body 7-2-1 adheres to reaming hammer slideway 7-2-2 and slides up and down under the traction of wire rope, and reaming hammer guiding scarfing cinder pipe 7-3 is positioned in the middle of the jump bit 7-1.
Contrast accompanying drawing 8, its structure comprise that hammer body 7-2-1 is hammered in slidably reaming into shape, slideway 7-2-2 is hammered in reaming into shape, and reaming hammer slideway 7-2-2 adheres to slidably reaming hammer hammer body 7-2-1 and goes up slip.
Embodiment
The present invention is applied to the construction of Lianyun Harbour rattan garden district, about 120,000 square metres of this residential quarter overall floorage, the little high level of high level and part is arranged, pile foundation engineering is designed to 900-1200mm diameter drilled pile, length is 18 meters to 24 meters, designing requirement is beaten test pile for long 18 meters according to stake, answers designing requirement, tries to make a call to four castinplace piles respectively with different constructions.
1. according to existing boring code requirement, the castinplace pile of diameter 800mm is beaten in examination, and by the national regulation requirement, stake bottom sediment is not more than 5cm, static load experiment behind the pile, and its ultimate bearing capacity is 2200KN.
2. according to existing boring code requirement, the castinplace pile of diameter 800 is beaten in examination, and last scarfing cinder pipe 9 links to each other with reaming hammer guiding scarfing cinder pipe 7-3 and carries out last scarfing cinder, static load experiment behind the pile, and its ultimate bearing capacity is 2600KN.
3. according to existing boring code requirement, the castinplace pile of diameter 800 is beaten in examination, and jump bit 7-1 is combined with reaming hammer 7-2, form enlarged footing, scarfing cinder pipe 9 and the reaming hammer guiding scarfing cinder pipe 7-3 side hammer that links to each other hits the limit scarfing cinder, and static load is tested behind the pile, and its ultimate bearing capacity is 4800KN.
4. at first hole with drilling rod in the construction, its structure comprises walking-type pile driver 1, A hoist engine 2, B hoist engine 3, unit head track 4, unit head 5, drilling rod 6, wherein A hoist engine 2 and B hoist engine 3 are installed on the walking-type pile driver 1, B hoist engine 3 links to each other with unit head 5 by wire rope, unit head 5 links to each other with drilling rod 6, unit head 5 slides at unit head track 4, and unit head slideway 4 links to each other with walking-type pile driver 1.Carry out bore operation, run into underground throwing and fill out ratchel in boring procedure, drill bit is difficult to continue.The drilling rod of dismantling, A hoist engine 2 links to each other with the jump bit 7 that has Counterboring apparatus by wire rope, carries out the hammering operation, when hammering during to designated depth, carries out the reaming construction.After finishing reaming, slag pipe 9 is linked to each other with reaming hammer guiding scarfing cinder pipe 7-3, scarfing cinder pipe 9 links to each other with portable sediment separate tank 8, carries out scarfing cinder, guarantees that bottom, a hole sludge is thoroughly removed.At last, be thrown into stone and hammering to bottom, stake hole, make even, the densely covered and stake end of stone.Static load experiment behind the pile, its ultimate bearing capacity is 6000KN.
The present invention adopts clean-out machine to be combined with jump bit, has that penetration rate is fast, embedding rock ability is strong; The jackstone bed course can be driven in the soil layer, and force the extrusion packing building stones to bearing stratum horizontal plane and bottom, make it enter density and the intensity of improving bearing course at pile end in the hardpan thereby ram stone because of jump bit; Clean-out machine and reaming hammer guiding scarfing cinder duct ligation close, and side hammer hits the limit scarfing cinder, can cooperate last scarfing cinder with rig; Jump bit and the combination of reaming hammer form enlarged footing, expand bottom face diameter and pile body cross section ratio and increase, and effectively improve bearing capacity of single pile, reduce building costs, guarantee the pile foundation engineering quality; Clean-out machine is hammered combination into shape with impacting reaming, can accomplish boring, reaming, scarfing cinder, jackstone, realizes function sharing, and the performance sharpest edges promote operating efficiency; Portable sediment separate tank can transport the place with the separation of clod sediment, avoids the mud contamination environment.
Test pile result is chart as follows:
Annotate: A is that bored pile adopts conventional rig to be bored pile employing clean-out machine drilling rod and to impact the scarfing cinder technology that reaming hammer guiding scarfing cinder pipe is connected by the process equipment B of existing national standard construction
C is that bored pile adopts impact reaming hammer to expand the reaming construction worker who after the end scarfing cinder end face is increased
Skill and equipment
D be bored pile adopt expand end scarfing cinder earlier after, jackstone again, construction technology and the equipment of pile again after jump bit buries the stone hammering.
Claims (4)
1. clean-out machine boring, the hammering pore-forming, reaming, the construction equipment of scarfing cinder, it is characterized in that comprising walking-type pile driver, the A hoist engine, the B hoist engine, the unit head track, unit head, drilling rod, the jump bit that has Counterboring apparatus, portable sediment separate tank, the scarfing cinder pipe, the stake hole, jackstone piece bed course, portal frame, wherein A hoist engine and B hoist engine are installed on the walking-type pile driver, the B hoist engine links to each other with unit head by wire rope, unit head links to each other with drilling rod, unit head slides at the unit head track, the unit head slideway links to each other with walking-type pile driver, the A hoist engine links to each other with the jump bit that has Counterboring apparatus by wire rope, the scarfing cinder pipe links to each other with portable sediment separate tank, portal frame links to each other with the jump bit that has Counterboring apparatus by wire rope, the jump bit that has Counterboring apparatus is positioned at a hole, and jackstone piece bed course is positioned at a bottom, hole;
Its job practices comprises following construction sequence:
One, unit head drives drilling rod boring, after rig boring reaches desired depth, removes drilling rod, uses the jump bit that has Counterboring apparatus instead;
Two, the jump bit hammering pore-forming that has Counterboring apparatus, and with the reaming of reaming hammer to designing the aperture;
Three, borer drill rod is connected with the guiding scarfing cinder pipe that impacts the reaming hammer, carries out the scarfing cinder operation by the scarfing cinder pipe, the reaming of stake end can increase the stake end and enlarge unit head bearing stratum area; In the reaming of stake end, be thrown into stone, with in the stone hammering underground layer, carry out the pile operation with jump bit again; Behind the reaming jackstone piece, make stake end soil layer and the acting in conjunction of jackstone stake end concrete, improve bearing capacity of pile tip;
Four, utilize the rig slush pump with the hole at the bottom of the sediment sucking-off, enter portable sediment separate tank by drilling rod, and at the bottom of stake jackstone, form bed course.
2. the construction equipment of clean-out machine boring according to claim 1, hammering pore-forming, reaming, scarfing cinder, it is characterized in that reaming is to utilize the hammering reaming to hammer into shape to finish, when jump bit is hammered onto designated depth, by rope hoisting jump bit and reaming hammer, the reaming hammer slides up and down at jump bit by slideway, the final stake end enlarged footing that forms.
3. the construction equipment of clean-out machine boring according to claim 1, hammering pore-forming, reaming, scarfing cinder, it is characterized in that scarfing cinder is to utilize clean-out machine suction with the sucking-off of stake inner hole deposition slag, drilling rod links to each other with guiding scarfing cinder pipe in the jump bit, side hammer hits the limit scarfing cinder, after reaming is finished, stake inner hole deposition slag is all removed the most at last, and the jackstone bed course, and institute's sucking-off sediment transports by portable sediment separate tank separation simultaneously.
4. the construction equipment of clean-out machine boring according to claim 1, hammering pore-forming, reaming, scarfing cinder, it is characterized in that having the jump bit of Counterboring apparatus, its structure comprises jump bit, reaming hammer, slidably guiding scarfing cinder pipe is hammered in reaming hammer hammer body, reaming hammer slideway, reaming into shape, wherein slidably reaming hammer hammer body adheres to reaming hammer slideway and slides up and down under the traction of wire rope, the reaming hammer links to each other with jump bit, reaming hammer guiding scarfing cinder pipe is positioned in the middle of the jump bit, and reaming hammer guiding scarfing cinder pipe links to each other with the scarfing cinder pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110108765 CN102182399B (en) | 2011-04-28 | 2011-04-28 | Construction method and equipment for reverse circulation drill to drill hole, hammer to form hole, expand hole and remove slag |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110108765 CN102182399B (en) | 2011-04-28 | 2011-04-28 | Construction method and equipment for reverse circulation drill to drill hole, hammer to form hole, expand hole and remove slag |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102182399A CN102182399A (en) | 2011-09-14 |
| CN102182399B true CN102182399B (en) | 2013-08-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201110108765 Expired - Fee Related CN102182399B (en) | 2011-04-28 | 2011-04-28 | Construction method and equipment for reverse circulation drill to drill hole, hammer to form hole, expand hole and remove slag |
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| CN (1) | CN102182399B (en) |
Families Citing this family (8)
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|---|---|---|---|---|
| CN102704873B (en) * | 2012-06-07 | 2015-01-21 | 徐守田 | Construction equipment of hole drilling/punching cast-in-place pile with self-provided mud pit and mud separating device |
| CN103924586B (en) * | 2014-03-18 | 2016-01-20 | 沈保汉 | Multi section drill grouting pile construction method |
| CN104295239A (en) * | 2014-09-29 | 2015-01-21 | 中铁建设投资集团有限公司 | Method for using rotary drilling rig to drill into hard rock stratum |
| CN109162659B (en) * | 2018-11-08 | 2023-09-05 | 淮南矿业(集团)有限责任公司 | Drilling-dropping method for large drill bit of reverse drilling machine, inverted basket and drilling-dropping structure |
| CN109826559A (en) * | 2018-12-31 | 2019-05-31 | 宁波二十冶建设有限公司 | A kind of simple drilling rig and construction method |
| CN112096323B (en) * | 2020-09-16 | 2022-04-22 | 湖北工建基础设施建设有限公司 | Construction system and method for slurry-free clear water pore-forming of cast-in-situ bored pile |
| CN112324333B (en) * | 2020-10-22 | 2022-08-02 | 河北省水利工程局 | Construction method for horizontal directional crossing of complex pebble-gravel stratum by underground pipeline |
| CN112681314A (en) * | 2021-01-15 | 2021-04-20 | 肖建波 | Pile expanding equipment for municipal road and bridge engineering |
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| US5186266A (en) * | 1991-02-15 | 1993-02-16 | Heller Marion E | Multi-walled drill string for exploration-sampling drilling systems |
| CN2649762Y (en) * | 2003-05-13 | 2004-10-20 | 山东省地质探矿机械厂 | Fully-hydraulic impact reverse-circulating drilling machine |
| CN101275458A (en) * | 2008-05-13 | 2008-10-01 | 张安禄 | Reverse circulation construction technique and apparatus of single rope impact drill |
| CN101831906A (en) * | 2009-03-09 | 2010-09-15 | 钱圣德 | Dry type pneumatic rock drilling pile-driving machine and working method thereof |
| CN201982013U (en) * | 2011-04-28 | 2011-09-21 | 徐守田 | Construction equipment for drilling, hammering hole, expanding hole and removing sediments with reverse circulation drilling rig |
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- 2011-04-28 CN CN 201110108765 patent/CN102182399B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5186266A (en) * | 1991-02-15 | 1993-02-16 | Heller Marion E | Multi-walled drill string for exploration-sampling drilling systems |
| CN2649762Y (en) * | 2003-05-13 | 2004-10-20 | 山东省地质探矿机械厂 | Fully-hydraulic impact reverse-circulating drilling machine |
| CN101275458A (en) * | 2008-05-13 | 2008-10-01 | 张安禄 | Reverse circulation construction technique and apparatus of single rope impact drill |
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| CN201982013U (en) * | 2011-04-28 | 2011-09-21 | 徐守田 | Construction equipment for drilling, hammering hole, expanding hole and removing sediments with reverse circulation drilling rig |
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