CN102747951A - Follow-up drilling machine for sleeve of down-the-hole hammer - Google Patents
Follow-up drilling machine for sleeve of down-the-hole hammer Download PDFInfo
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- CN102747951A CN102747951A CN2012102568547A CN201210256854A CN102747951A CN 102747951 A CN102747951 A CN 102747951A CN 2012102568547 A CN2012102568547 A CN 2012102568547A CN 201210256854 A CN201210256854 A CN 201210256854A CN 102747951 A CN102747951 A CN 102747951A
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Abstract
The invention relates to the technical field of engineering pile machines, in particular to a follow-up drilling machine for a sleeve of a down-the-hole hammer. The follow-up drilling machine for the sleeve of the down-the-hole hammer comprises a supporting machine, an impact device, a vibrating hammer, a drill stem and the sleeve, wherein the supporting machine comprises a base, an upright post, a winding engine, an operating room and a towing steel rope; the impact device comprises the down-the-hole hammer and an air compressor; the sleeve is sleeved outside the drill stem; a top pulley block is arranged at the upper end of the upright post; and guide slide rails are arranged at two sides of the upright post. The follow-up drilling machine for the sleeve of the down-the-hole hammer is characterized in that a power head is arranged on the guide slide rail at the front side of the upright post; a movable pulley block I and a movable pulley block II are arranged on the guide slide rail at the rear side of the upright post; a fixed pulley block I and a fixed pulley block II are arranged on the base; a beam is arranged at the lower part of the sleeve in front of the base, and the drill stem is a bladeless steel tube. The structure is adopted, so that the follow-up drilling machine for the sleeve of the down-the-hole hammer has the advantages of simple structure, low center of gravity, high stability, low device cost and the like.
Description
Technical field
The present invention relates to engineering piles machine technology field, specifically a kind of down-the-hole hammer sleeve pipe follow-up rig.
Background technology
At present, go into the difficult problem of rock for solving long-spiral drilling machine, and prevent that hole wall collapse causes bit freezing and influences the pile quality problem in the bored pile construction; Mud off causes problems such as cost increase and environment pollution; One of technological means that adopts is to use the equipment and the construction technology of sleeve pipe follow-up retaining wall pore-forming, and the mode of sleeve pipe follow-up mainly contains three kinds: 1, immersed tube mode, sleeve pipe lean on hammering, vibration or static pressure to sink to underground; 2, shake the tube side formula, sleeve pipe is shaken one side on one side and is sunk to underground by static pressure; 3, swivelling pipe mode, to lean on static pressure or gravity to pierce underground while sleeve pipe rotates.Above-mentioned three kinds of modes are tended to the swivelling pipe mode on the market now.With the swivelling pipe mode construct main use following several kinds of rigs and job practices arranged: 1, single driving type drill machine with casing: mainly constitute by support machine, drill power head, percussion mechanism, outer tube and auger stem; Under the driving of drill power head, on one side outer tube and auger stem rotate, an edge support machine column moves downward; The drilling stratum by the spiral leaf casting of auger stem periphery, forms the stake hole; In the stake hole, insert reinforcing cage and concrete perfusion, can be built into the underground foundation stake.2, double-driving drill machine with casing: mainly constitute by support machine, outside unit head, inboard unit head, percussion mechanism, outer tube and auger stem; Under the driving respectively of outside unit head and inboard unit head; Outer tube and auger stem rotate on one side, and an edge support machine column moves downward the drilling stratum; By the spiral leaf casting of auger stem periphery, form the stake hole; Inboard unit head is extracted auger stem.Outer tube and outside unit head throw off stay underground, insert reinforcing cage and concrete perfusion in the sleeve pipe outside after, outside unit head is extracted outer tube from underground, promptly accomplish the underground foundation pile driving construction.The outer tube of above-mentioned two kinds of drill machine with casing can rotary drilling, can play the effect that retaining wall prevents hole wall collapse again, but that the double-driving drill machine with casing is more suitable for outer tube is stayed is underground, behind the concrete perfusion again from underground construction technology of extracting outer tube.
Chinese patent number: 98120410. 4 disclose the technology of similar above-mentioned double-driving drill machine with casing.But there is following shortcoming in above-mentioned double-driving drill machine with casing technology: because outer tube and drilling rod carry out top drive by unit head; Sleeve pipe and unit head are not easily separated must extract ground simultaneously with drilling tool; Long auger directly pours into all right, joins down-the-hole and hammers into shape into the very difficult assurance of the quality of rock construction descending reinforcing cage and pouring construction stake.The big center of gravity of dynamic again head two driving quality is higher, and poor stability is the potential safety hazard in the construction, is to improve construction quality and stability.
Chinese patent number: ZL200620158137.0 discloses " a kind of drill machine with casing "; The purpose of this utility model is to attempt to provide that a kind of type of drive is reasonable, center of gravity is low, stability is high, easy and safe to operate, efficiency of construction is high, the drill machine with casing of low cost of manufacture.This a kind of drill machine with casing can select positions different in the prescribed limit to drive corresponding drilling tool, can adapt to multiple construction technology.The drill machine with casing unit head is except that can be the top drive drilling tool; Can also be in the drilling tool middle part or lower position drive, can reduce more than 1/2 during the aspect ratio top drive on the relative ground of drill power head, its deficiency is: one, because column top pulleys group adopts the pulley of multiplying power form; Column one side adopts two driving unit heads; Not only strengthen the weight of column one side, made the unbalance stress of column front and back, caused column to produce bigger moment of flexure; Increase the weight of top pulleys group simultaneously, greatly reduced the stability of stake machine.And; The relative ground of drill power head has only reduced by 1/2 height; Though it is half that its height has reduced, two driving unit heads still will be in the top of rig when rig is walked, and its center of gravity and stability can not get effective raising; Cause adverse effect must for the operation stability of stake machine, and the operation stability of stake machine is the most important thing; Two, owing to adopt auger stem, when the drilling stratum, the suitable soil layer that the soil is porous of this structure, and for lithosphere is not easy to make outside the fragmented rock bits are portalled by the pneumatics air-blowing.
Summary of the invention
The objective of the invention is to solve the deficiency of above-mentioned prior art, provide a kind of down-the-hole simple in structure, that center of gravity is low, stability is high, equipment cost is low to hammer sleeve pipe follow-up rig into shape.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of down-the-hole hammer sleeve pipe follow-up rig comprises support machine, percussion mechanism, vibrating hammer, drilling rod and sleeve pipe, and support machine comprises base, column, hoist engine, operating room and haulage cable; Percussion mechanism comprises down-the-hole hammer and air compressor machine, and the drilling rod outside is with sleeve pipe, and the column upper end is provided with the top pulleys group; Both sides are respectively equipped with directive slide track, it is characterized in that the directive slide track of column front side is provided with a unit head, and the directive slide track of rear side is provided with running block I and running block II; Base is provided with fixed pulley group I and fixed pulley group II, makes the column front and back stressed equal, avoids column to produce moment of flexure; Alleviate column weight, reduced the multiplying power pulley on the top pulleys group simultaneously, alleviated the weight of top pulleys group; Improved the stability of stake machine, the square casing bottom is provided with crossbeam before the base, and said crossbeam center is provided with manhole; The center of both sides, crossbeam upper end is arranged with the clamping otic placode, and the clamping otic placode is tabular, and the through hole lower end that sleeve pipe passes the crossbeam center is connected with the down-the-hole hammer through shoe; So that sleeve pipe slides up and down in the through hole of crossbeam, cannula tip is provided with baffle ring, and crossbeam is corresponding with baffle ring; The vibrating hammer lower end is fixedly connected with the clamping otic placode through gripper clamp, and the upper end is connected with the reel I of hoist engine through steel wire penetrating top pulleys group, running block I, fixed pulley group I and row's rope pulley I, and hoist engine is pumped through wire rope drive vibrating hammer and crossbeam; Drive crossbeam vibration sleeve pipe through vibrating hammer, reach the effect that moves on the sleeve pipe.After the sleeve pipe entering was underground, cannula tip leant through baffle ring and crossbeam, because vibrating hammer is located at the sleeve pipe bottom, the equipment center of gravity of making has obtained stable greatly, particularly obtains substantive raising in its center of gravity and stability when rig is walked.
Said unit head comprises guiding frame, motor, reductor and swivel coupling; Guiding machine is erected on the directive slide track of column; Motor and reductor are fixed on the guiding frame, and unit head upper end is connected with the reel II of hoist engine with row's rope pulley II through the fixed pulley group II that is fixed on top pulleys group on the column, running block II, the base through wire rope, and unit head top is provided with swivel coupling; The swivel coupling lower end is connected with the down-the-hole hammer through tracheae and through drilling rod; The upper end is connected with air compressor machine through tracheae, and unit head drives drilling rod and the rotation of down-the-hole hammer, under the effect of air compressor machine, drives the vibration of down-the-hole hammer simultaneously and drives drilling rod, sleeve pipe and unit head up-down vibration; Through adopting unit head and down-the-hole hammer device to drive drilling rod and sleeve pipe, saved the cost of production of equipment.
Drilling rod according to the invention is the on-bladed steel pipe, is beneficial to the gap of fragmented rock between sleeve pipe and drilling rod and is transported to the face of land.
The present invention can be respectively equipped with location-plate at clamping otic placode two ends, and the location-plate lower end is fixedly connected with crossbeam, moves horizontally to prevent vibrating hammer, reaches the effect of clamping location.
The present invention has advantages such as simple in structure, that center of gravity is low, stability is high, equipment cost is low owing to adopt said structure.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Fig. 2 is the left view of Fig. 1.
Fig. 3 is the structural representation of medium power head unit front view of the present invention.
Fig. 4 is the left view of Fig. 3.
Fig. 5 is a kind of structural representation of middle cross beam of the present invention.
Fig. 6 figure is second kind of structural representation of middle cross beam of the present invention.
Fig. 7 is the vertical view of Fig. 6.
Reference numeral: base 1, column 2, hoist engine 3, operating room 4, wire rope 5, motor 6, reductor 7; Down-the-hole hammer 8, air compressor machine 9, drilling rod 10, sleeve pipe 11, running gear 12, casing 13; Top pulleys group 14, directive slide track 15,16, running block I 17, running block II 18, fixed pulley group I 19, fixed pulley group II 20; Crossbeam 21, clamping otic placode 22, vibrating hammer 23, row's rope pulley I 24, row's rope pulley II 25, reel I 26; Reel II 27, wire rope 28, guiding frame 29, swivel coupling 30, tracheae 31, unit head 32, location-plate 33.
The specific embodiment
Below in conjunction with accompanying drawing the present invention is further specified:
Shown in accompanying drawing, a kind of down-the-hole hammer sleeve pipe follow-up rig comprises support machine, percussion mechanism, vibrating hammer, drilling rod 10 and sleeve pipe 11; Support machine comprises base 1, column 2, hoist engine 3, operating room 4 and wire rope 5,28, and percussion mechanism comprises down-the-hole hammer 8 and air compressor machine 9, and the structure of down-the-hole hammer 8 is identical with prior art; This does not give unnecessary details, and drilling rod 10 outsides are with sleeve pipe 11, and cterpillar drive 12 or stride running gear 12 can be adopted in base 1 lower end; Cterpillar drive 12 or stride running gear 12 are prior art, and this does not give unnecessary details, and base 1 upper end is provided with hoist engine 3 and operating room 4; Base 1 front end is provided with column 2, and sleeve pipe 11 bottoms are provided with casing 13, and casing 13 is fixedly connected with column 2; To guarantee the straight-line displacement of sleeve pipe 11 in rising or folding process, column 2 upper ends are provided with top pulleys group 14, and both sides are respectively equipped with directive slide track 15,16; The directive slide track 15 that it is characterized in that column 2 front sides is provided with a power head device, and the directive slide track 16 of rear side is provided with running block I 17 and running block II 18, and base 1 is provided with fixed pulley group I 19 and fixed pulley group II 20; Make column 2 front and back stressed equal, avoid column 2 to produce moments of flexure, alleviate column 2 weight; Reduce the multiplying power pulley on the top pulleys group 14 simultaneously, alleviated the weight of top pulleys group 14, improved the stability of stake machine; Square casing 11 bottoms are provided with crossbeam 21 before the base 1, and said crossbeam 21 centers are provided with manhole, and the center of both sides, crossbeam 21 upper end is arranged with clamping otic placode 22; Clamping otic placode 22 is tabular, and sleeve pipe 11 passes the through hole at crossbeam 21 centers, and the lower end is connected with down-the-hole hammer 8 through shoe; So that crossbeam 21 slides up and down along sleeve pipe 11 axle center, and sleeve pipe 11 matches with through hole and is slidingly connected, and sleeve pipe 11 tops are provided with baffle ring; Crossbeam 21 is corresponding with baffle ring, and vibrating hammer 23 lower ends are fixedly connected with clamping otic placode 22 through gripper clamp, and the upper end is passed top pulleys group 14, running block I 17, fixed pulley group I 19 and row's rope pulley I 24 through wire rope 28 and is connected with the reel I 26 of hoist engine; The clutch of said reel I 26 and reel II 27 is controlled by oil cylinder or cylinder respectively with brake, and hoist engine drives vibrating hammers 23 through wire rope 28 and pumps with crossbeam 21, drives crossbeam 21 vibration sleeve pipes 11 through vibrating hammer 23; Reach the effect that moves on the sleeve pipe 11, after sleeve pipe 11 entering were underground, sleeve pipe 11 tops leant through baffle ring and crossbeam 21; Because vibrating hammer 23 is located at sleeve pipe 11 bottoms, the equipment center of gravity of making has obtained stable greatly, particularly obtains substantive the raising in its center of gravity and stability when rig is walked.
Said unit head 32 comprises guiding frame 29, motor 6, reductor 7 and swivel coupling 30; Guiding frame 29 is located on the column 2; Motor 6 is fixed on the guiding frame 29 with reductor 7; Unit head 32 upper ends are connected with the reel II 27 of hoist engine 3 with row's rope pulley II 25 through the fixed pulley group II 20 that is fixed on top pulleys group 14 on the column 2, running block II 18, the base through wire rope 5; Unit head top is provided with swivel coupling 30, and swivel coupling 30 lower ends are connected with down-the-hole hammer 8 through tracheae 31 and through drilling rod 10, and the upper end is connected with air compressor machine 9 through tracheae 31; Make unit head 32 drive drilling rod 10 and 8 rotations of down-the-hole hammer; Under the effect of air compressor machine 9, drive 8 vibrations of down-the-hole hammer simultaneously and drive drilling rod 10, sleeve pipe 11 and unit head 32 up-down vibration, drive drilling rod 10 and sleeve pipe 11, saved the cost of production of equipment through adopting unit head 32 and down-the-hole hammer device.
Drilling rod 10 according to the invention is the on-bladed steel pipe, is beneficial to the gap of fragmented rock between sleeve pipe 11 and drilling rod 10 and is transported to the face of land.
The present invention can be respectively equipped with location-plate 33 at clamping otic placode 22 two ends, and location-plate 33 lower ends are fixedly connected with crossbeam 21, moves horizontally to prevent vibrating hammer, reaches the firm effect of clamping.
The present invention has two cover wire rope on the stake machine twin drum winch when work, two cover wire rope are respectively through two cover row rope pulley I 24 and II 25; Two cover running block I 17 and II 18 are connected with II 20 with two cover fixed pulley group I 19 respectively, and two cover fixed pulley group I 19 are connected with two cover wire rope 5,28 respectively with II 20 upper ends; And pass through two of top pulleys group 14 and overlap assembly pulleys, being connected respectively to unit head 32 upper ends and two vibrating hammer 22 upper ends, two vibrating hammers 23 are clipped in respectively on the clamping otic placode 22 on the crossbeam 21 through gripper clamp; Vibrating hammer 23 is not positioned at casing 13 bottoms when not working with crossbeam 21, and the reel I 26 of twin drum winch is in reductor and separates braking state during boring, and reel II 27 is in reductor and combines non-braking state; The wire rope of reel II 27 is connected with unit head through running block II wire rope 5, and the control operation system rotates unit head 32; Reel II 27 is transferred, 8 vibrations of down-the-hole hammer, boring downwards; Sleeve pipe 11 bores for 8 times with the down-the-hole hammer, and the ground bits are upwards blown out by high pressure gas from the crack between drilling rod 10 and the sleeve pipe 11, and crossbeam 21 is failure to actuate with vibrating hammer 23 this moments; When hole drill arrives desired depth, drilling rod 10 and down-the-hole hammer 8 are proposed, vibrating hammer 23 gripper clamps unclamp; Crossbeam 21 and sleeve pipe 11 are stayed underground, opened casing 13 and remove a machine, descending reinforcing cage and concrete perfusion.In the time of need pulling out sleeve pipe 11, move the stake machine, two vibrating hammers, 23 gripper clamps are clamped crossbeam 21 two ends clamping otic placodes 22 respectively; Open casing 13 casing 13 is removed, start vibrator 23 and reel I 26, vibrator drives vibrating hammer 23 actions; Sleeve pipe 11 vibration extracted and be enclosed within on down-the-hole hammer 8 and the drilling rod 10 stop vibration; Make sleeve pipe 11 lower ends and down-the-hole hammer 8 tups into shape and be connected, start lifting drum I 26 vibrating hammer 23 and crossbeam 21 are put into casing 13 bottoms, with casing 13 locking of closing.Accomplish one and go into the rock pile driving construction.During stake machine walking operation, can sleeve pipe 11 be stuck in down-the-hole and hammer 8 lower ends into shape, 23 of vibrating hammers are fallen on the base of machine bottom 1 platform, reach the effect that lowers the center of gravity.The present invention can realize the bored pile construction to various lithospheres.
The present invention has advantages such as simple in structure, that center of gravity is low, stability is high, equipment cost is low owing to adopt said structure.
Claims (3)
1. a down-the-hole hammer sleeve pipe follow-up rig comprises support machine, percussion mechanism, vibrating hammer, drilling rod and sleeve pipe, and support machine comprises base, column, hoist engine, operating room and haulage cable; Percussion mechanism comprises down-the-hole hammer and air compressor machine, and the drilling rod outside is with sleeve pipe, and the column upper end is provided with the top pulleys group; Both sides are respectively equipped with directive slide track, it is characterized in that the directive slide track of column front side is provided with a unit head, and the directive slide track of rear side is provided with running block I and running block II; Base is provided with fixed pulley group I and fixed pulley group II, and the square casing bottom is provided with crossbeam before the base, and said crossbeam center is provided with manhole; Two ends are arranged with the clamping otic placode on the crossbeam, and the clamping otic placode is tabular, and the through hole lower end that sleeve pipe passes the crossbeam center is connected with the down-the-hole hammer through shoe; So that sleeve pipe slides up and down in the through hole of crossbeam, cannula tip is provided with baffle ring, and crossbeam is corresponding with baffle ring; The vibrating hammer lower end is fixedly connected with the clamping otic placode through gripper clamp; The upper end is connected with the reel I of hoist engine through steel wire penetrating top pulleys group, running block I, fixed pulley group I and row's rope pulley I, and after the sleeve pipe entering was underground, cannula tip leant through baffle ring and crossbeam.
2. a kind of down-the-hole hammer sleeve pipe follow-up rig according to claim 1 is characterized in that said drilling rod is the on-bladed steel pipe.
3. a kind of down-the-hole hammer sleeve pipe follow-up rig according to claim 1; It is characterized in that said unit head comprises guiding frame, motor, reductor and swivel coupling; Guiding machine is erected on the directive slide track of column; Motor and reductor are fixed on the guiding frame, and unit head upper end is connected with the reel II of hoist engine with row's rope pulley II through the fixed pulley group II that is fixed on top pulleys group on the column, running block II, the base through wire rope, and unit head top is provided with swivel coupling; The swivel coupling lower end is connected with the down-the-hole hammer through tracheae and through drilling rod, and the upper end is connected with air compressor machine through tracheae.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102568547A CN102747951A (en) | 2012-07-24 | 2012-07-24 | Follow-up drilling machine for sleeve of down-the-hole hammer |
| CN201210383781.8A CN102852457B (en) | 2012-07-24 | 2012-10-11 | Follow-up drilling machine for down-hole hammer casing pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102568547A CN102747951A (en) | 2012-07-24 | 2012-07-24 | Follow-up drilling machine for sleeve of down-the-hole hammer |
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| Publication Number | Publication Date |
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| CN102747951A true CN102747951A (en) | 2012-10-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012102568547A Pending CN102747951A (en) | 2012-07-24 | 2012-07-24 | Follow-up drilling machine for sleeve of down-the-hole hammer |
| CN201210383781.8A Active CN102852457B (en) | 2012-07-24 | 2012-10-11 | Follow-up drilling machine for down-hole hammer casing pipe |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210383781.8A Active CN102852457B (en) | 2012-07-24 | 2012-10-11 | Follow-up drilling machine for down-hole hammer casing pipe |
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| CN (2) | CN102747951A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103953042A (en) * | 2014-04-30 | 2014-07-30 | 长安大学 | Sleeve-type combined piling machine and piling method thereof |
| CN104533284A (en) * | 2014-04-22 | 2015-04-22 | 威海市水利岩土工程有限公司 | Long screw pile machine |
| CN104863496A (en) * | 2014-12-26 | 2015-08-26 | 襄阳畅勘智能机械有限公司 | Hydraulic high-frequency DTH rock-breaking drill for rotary pile drill hole bottom |
| CN105332668A (en) * | 2015-12-08 | 2016-02-17 | 中铁七局集团武汉工程有限公司 | Punched-pile drill blocking processing device and method |
| CN111270991A (en) * | 2020-04-13 | 2020-06-12 | 北京中岩大地科技股份有限公司 | Amplitude-variable down-the-hole hammer drill and construction method thereof |
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| CN103161163B (en) * | 2013-03-27 | 2015-01-28 | 孔超 | Prestressed tubular pile for spinning rock drilling and embedding rock socketing |
| CN105298382A (en) * | 2014-06-28 | 2016-02-03 | 湖南泰达天易重工有限公司 | Drill burying preventing method of long twist drill |
| CN111550180A (en) * | 2020-05-11 | 2020-08-18 | 中铁十八局集团有限公司 | Construction method and construction equipment for hard rock stratum pile foundation in low-clearance narrow space |
| CN111852323A (en) * | 2020-06-12 | 2020-10-30 | 杨忠财 | Crawler walking down-the-hole hammer drill |
| CN113062693B (en) * | 2021-04-14 | 2022-07-29 | 太原理工大学 | Device and method for extracting gas by drilling complicated stratum through pipe-following protective hole |
| CN115478784A (en) * | 2021-06-16 | 2022-12-16 | 中油国家油气钻井装备工程技术研究中心有限公司 | Stepping type sleeve pressurizing device |
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| BE795205A (en) * | 1972-02-10 | 1973-05-29 | Atlas Copco Ab | METHOD AND APPARATUS FOR ROTARY DRILLING |
| CN2179453Y (en) * | 1993-09-19 | 1994-10-12 | 郭允庄 | Vibrating hammer with hidden holes |
| JPH07293167A (en) * | 1994-04-26 | 1995-11-07 | Nippon Sharyo Seizo Kaisha Ltd | Rock-bed excavating method and its device |
| US8118115B2 (en) * | 2008-02-22 | 2012-02-21 | Roussy Raymond J | Method and system for installing geothermal heat exchangers, micropiles, and anchors using a sonic drill and a removable or retrievable drill bit |
| CN201883963U (en) * | 2009-04-26 | 2011-06-29 | 史相辰 | Beam hanger |
| CN202788610U (en) * | 2012-07-24 | 2013-03-13 | 威海市海泰起重机械有限公司 | Down-hole hammer sleeve follow-up drilling machine |
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2012
- 2012-07-24 CN CN2012102568547A patent/CN102747951A/en active Pending
- 2012-10-11 CN CN201210383781.8A patent/CN102852457B/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104533284A (en) * | 2014-04-22 | 2015-04-22 | 威海市水利岩土工程有限公司 | Long screw pile machine |
| CN104533284B (en) * | 2014-04-22 | 2017-12-22 | 威海市水利岩土工程有限公司 | A kind of long spire stake machine |
| CN103953042A (en) * | 2014-04-30 | 2014-07-30 | 长安大学 | Sleeve-type combined piling machine and piling method thereof |
| CN104863496A (en) * | 2014-12-26 | 2015-08-26 | 襄阳畅勘智能机械有限公司 | Hydraulic high-frequency DTH rock-breaking drill for rotary pile drill hole bottom |
| CN104863496B (en) * | 2014-12-26 | 2017-03-22 | 襄阳畅勘智能机械有限公司 | Hydraulic high-frequency DTH rock-breaking drill for rotary pile drill hole bottom |
| CN105332668A (en) * | 2015-12-08 | 2016-02-17 | 中铁七局集团武汉工程有限公司 | Punched-pile drill blocking processing device and method |
| CN111270991A (en) * | 2020-04-13 | 2020-06-12 | 北京中岩大地科技股份有限公司 | Amplitude-variable down-the-hole hammer drill and construction method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102852457B (en) | 2014-04-23 |
| CN102852457A (en) | 2013-01-02 |
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Application publication date: 20121024 |