CN103244051B - A kind of combined down-hole hammer drilling tool and pile forming method thereof - Google Patents
A kind of combined down-hole hammer drilling tool and pile forming method thereof Download PDFInfo
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Abstract
The present invention relates to a kind of combined down-hole hammer drilling tool and pile forming method thereof, comprise open type down-hole hammer, multilayer Dentate screw drilling rod, open type down-hole hammer and multilayer Dentate screw drilling rod are fixed by pin, axle and sealing mat; The impactor of described open type down-hole hammer is designed to hollow type impactor, is provided with the movable bottom door that can close in the bottom of open type down-hole hammer, and side arranges reaming block, arranges forced-draft hole, high pressure gas ash pit in inside; Described multilayer Dentate screw drilling rod is made up of pipe in drilling rod outer tube and drilling rod, and drilling rod outer tube is provided with air pipe; During pile, after a design elevation at the bottom of the stake machine of combined down-hole hammer drilling tool rotates forward and to enter, down-hole hammer bottom movable bottom door is opened, by managing in drilling rod, hollow type impactor passage high pressure pumping of concrete pile.Combined down-hole hammer drilling tool provided by the present invention can realize disposal pore-forming pile, and its pile forming method operation is simple, high efficiency, energy conservation.<!--1-->
Description
The invention belongs to building field, relate to a kind of drilling tool and pile forming method thereof, be specifically related to a kind of can the combined down-hole hammer drilling tool of one-step pore-creating pile and pile forming method thereof.
In recent years, along with the development of China's building field, high-rise and super highrise building is more and more intensive, more and more higher to the requirement on basis, the foundation pile stake end in a lot of area must embed rock stratum certain depth and just can meet design requirement, for solving an embedding rock difficult problem, down-hole hammer technology is developed gradually in technical field of research in recent years.
Domestic down-hole hammer technology hole forming method more than 100 multinomial patent research, has progressively developed into from simple employing down-hole hammer technology pore-forming and has adopted down-hole hammer with pipe combination pore-forming, improve the technical level of pore-forming in basement rock since the eighties.
Publication number CN85107194A discloses the drilling method that a kind of supercharger drives down-hole hammer, propose and do first order compression by multiple stage low pressure, air compressor machine parallel connection, second level compression done by direct supply supercharger, driving down-hole hammer works, and utilizes compressed air to press Problems existing in drilled as holes for power solves in low pressure pneumatics.
Publication number CN2066480U discloses a kind of Wet type sealing inverse circulation pneumatic down-hole hammer, its object and task to realize heavy caliber gravel layer, the single head down-hole hammer of basement rock, hard rock drilling, piston action area is large, low blast, closed circulation, piston mass is large, property regulation is convenient, changes individual part and can change impactor running parameter, extend bit life.Flushing liquor protection hole wall, reacting cycle deslagging can reacting cycle continous sampling also can total cost management, speed of fulfiling hole is fast, improves drilling well operating efficiency, reduces job costs.
Publication number CN101319599A discloses a kind of side suction type reverse circulation drilling bit, the subject matter existed in hollow hammer hole application process is: drill bit exit holes spirit body undergoes rapid expansion in the process of strong sucker, part gas carries molecule rock dust and overflows from the annular gap that drilling tool is holed, because the gas flow of outer czermak space is little, upper inverted ventilation speed is not enough gets rid of boring by rock dust, rock dust is suspended on hole wall and the step place being deposited in drilling tool and being connected, not only cause the loss of rock sample ore, and rock dust is piled up for a long time, when especially meeting water in hole, easily cause the problem such as undergauge and stick of tool.Its object is just for above-mentioned the deficiencies in the prior art, provides a kind of and carries the undergauge that granule landwaste rock dust causes from the effusion of boring czermak space, the side-suction type circulation drill bit of stick of tool and part sample ore loss problem to solve branch's gas.
Publication number CN101967955A discloses a kind of from revolution composition down-hole hammer and construction method, its required first technical problem solved is to provide and a kind ofly hard alloy head on drill hammer is worn and torn be tending towards balanced, can increase work efficiency and the combined down-hole hammer that certainly revolves round the sun in application life.Second technical problem solved is needed to be to provide the simple and quick construction method of this combined down-hole hammer that certainly revolves round the sun.Start the unit head of rig, drive drilling rod, rotate clockwise from revolution combined down-hole hammer, after hole position alignment, starting air supply system provides air driven from each impactor action of revolution composition down-hole hammer; Unit head declines, and drive and rotate high-frequency percussion drilling downwards from revolution combined down-hole hammer, disintegrating slag is expelled to ground with the exhaust stream of impactor by the annular gap of drilling rod between hole wall.Punching is to desired depth, and abundant deslagging.Unit head upwards promotes, and is also promoted to ground from revolution composition formula down-hole hammer thereupon.Rig, to mobile, puts into reinforcing cage concreting on one side in boring, after general time solidification, namely becomes beneath foundation pile.Rig is walked next construction location, repeats above step.According to field geology conditions and actual air feed parameter, damping adjustable ring is installed in adjustment, and reasonable distribution air-flow, effectively utilizes energy, improves perforating efficiency.Except can using the drilling rod of hollow cylindrical, the auger stem of hollow can also be used, by 2 bearing pins and sealing mat and combined down-hole hammer grafting fixing after punch, deslagging efficiency is improved, drive in the process of combined down-hole hammer rotary impact punching at unit head, the drill hammer of several minor diameter impactor while revolving round the sun thereupon, effect by formation resistance can also around own axes rotation, acting and the wearing and tearing of impacting the hardness alloy head in rotary head are tending towards balanced, increase work efficiency and application life.According to the present invention, use auger stem and combined down-hole hammer supporting, deslagging better effects if under the same conditions, dark hole of can sounding the night watches, more economical.
Publication number CN201786251U discloses a kind of combined down-hole hammer, and publication number CN101949261A discloses a kind of combined down-hole hammer and construction method, and two patents are identical, practical and inventing type, after punching to the expectation degree of depth, and abundant deslagging; Unit head upwards promotes, and combined down-hole hammer is also promoted to ground thereupon; Rig is to mobile on one side, and Xiang Kongzhong puts into reinforcing cage, concrete perfusion, after a period of time solidification, namely becomes underground pile basis.
Publication number CN202431202U discloses a kind of comprehensive detritus heavy caliber combined drill, and in view of the above problems, the purpose of this utility model is to provide a kind of comprehensive detritus heavy caliber combined drill, and the maximum feature of this drill bit is by impact detritus, cataclasite.Revolution detritus and tired Breaking Rock Mechanism etc. combine, and form comprehensive detritus efficiency, increase the compliance of combination down-hole hammer formation.
Publication number CN202866644U discloses a kind of gear wheel, down-hole hammer way-type drilling unit, object has repeated wammel and reaming and repeat to creep into for above-mentioned and propose a kind of gear wheel, down-hole hammer way-type drilling unit technical scheme, creates a kind of new transfer compound turn into technology by this combination is corresponding.
Publication number CN101581195A discloses a kind of environmental-friendly downhole hammer rock drilling machine, relate to a kind of environmental-friendly downhole hammer rock drilling machine, liquid supply box and liquid-supplying system is provided with owing to increasing on the basis of existing downhole hammer rock drilling machine, can make liquid together with compressed air from the chisel head base injcction dropped hammer out during work, and described liquid both can be water, also can be cement paste, swell soil or mortar, when using water as liquid, the chisel head of heating can be cooled, be conducive to improving its abrasion resistance, increase work efficiency and guarantee longer working life, when with cement paste, when swell soil or mortar are as liquid, the situation of caving in around the eyelet that can prevent oneself from digging out, be conducive to safety in production, in addition, the dust produced in the process of construction of punchinging can be effectively suppressed, the noise of construction period of punchinging also can greatly reduce, and while water sprays discharge together with high pressure air, the speed of punchinging also can effectively improve, there is very strong practicality.
Publication number CN201090135Y discloses a kind of way-type drilling unit, comprises the hollow drill of end with pneumatic down hole hammer, and the internal sleeve of described hollow drill is equipped with the blast pipe be connected with wind regime, and the described air outlet of blast pipe is connected with the air guide hole of down-hole hammer; The outer pillar that the length being coated with length and hollow drill in the outside of described hollow drill adapts, both ends and the hollow drill of described outer pillar are connected as a single entity.Above-mentioned drilling tool is arranged on after on unit head by tie-plate, down-hole hammer direct circulation vertical impact creeps into, compressed air is transferred to down-hole hammer through inner blast pipe and drives its work done, the waste gas of discharging is discharged through drill bit steam vent, cooling drill bit, and carry rock slag and return to earth's surface along the annular gap between hole wall and outer pillar, at this moment, outer pillar and hollow drill interlock, protect lonely wall integrity; Meanwhile, unit head drives hollow drill and pneumatic down hole hammer to carry out the pressure of the drill and the rotary drilling of appropriateness, accelerates the fragmentation to rock.
Publication number CN101709621A discloses a kind of wind pressure drilling device of pneumatic down-hole hammer, relate to pneumatic down-hole hammer drilling apparatus, particularly a kind of wind pressure drilling device of pneumatic down-hole hammer crept at macadam and sand pebble layer, it is characterized in that being set with a wear-resistant sleeve outward at drilling rod, clutch disk is provided with between this wear-resistant sleeve and drilling rod, be provided with at the two ends of this wear-resistant sleeve and connect catcher, the connection catcher at lower port place connects conical closure section.Between the middle part and drilling rod of wear-resistant sleeve, be provided with a disk be fixedly connected with, connection catcher connection one the sealing disk at the upper port place of wear-resistant sleeve, forms the composite drill rod improving wind speed in boring.Or on the top of wear-resistant sleeve, asking of bottom and drilling rod be respectively provided with a clutch disk as wear-resistant sleeve, and same fixed rack, is formed and drag for tube cell.Qigong down-hole hammer wind pressure drilling device of the present invention drags for tube cell by improving wind speed in boring with setting up, and can remove rock dust, landwaste and gravel in boring in time, greatly improve drilling efficiency.
Publication number CN2555370Y discloses a kind of Telescopic percussion rig, relates to the Telescopic percussion rig boring geophysical prospecting for oil well.It enters drilling tool and pneumatic down-hole hammer boring under in the chamber that drift sand, the drilling rod of gravel well section and drill bit formed, ring cavity circulation canal is formed: ground drilling tool fills the gentle tengential belt of gas tap between the inwall of saw rod and drilling tool, compressed air injects from gas tengential belt, through gas tap, drilling tool, down-hole hammer, through ring cavity passage, the landwaste that jarring is got off is delivered to ground by shaft bottom.Jarring rock under high pressure draught impacts, can drill rock well section, follow-up input explosive can be cast smoothly, obtains accurate seismic data.
Publication number CN101831906A discloses a kind of dry type pneumatic rock drilling pile-driving machine and engineering method thereof, it is characterized in that a machine is by pile frame, upper unit head, auger stem, lower unit head, steel pile casting, pneumatic down-hole hammer, 30-60m.Air compressor machine and high pressure gas pipeline composition.Its engineering method feature one is erection equipment, two is use pneumatic down-hole hammer fractured rock, after broken, the soil body, rock ballast are discharged stake holes by helical blade from slag notch, and three is construction soil layer, layer of sand and gravel layers, uses steel pile casting retaining wall, the present invention compared with prior art, there is following remarkable advantage: this invention is when constructing rock drill hole pouring pile, and not only cutting rate is fast, and in dry type, environmental protection construction, job site is clean, mud-less pollution.
Publication number CN10195625A discloses a kind of down-the-hole hammer reverse circulating concentric casing drilling drilling tool, relates to a kind of down-the-hole hammer reverse circulating concentric casing drilling drilling tool.Be connected with starter with spline housing by semicircle card by hollow type down-hole hammer, be provided with external splines in the axial direction at starter and match with the internal spline of ring-shaped sleeve drill bit, starter 3 is designed to reacting cycle structure, and ring-type is suspended on the lower end of sleeve pipe with pipe bit by shoe.Compared with prior art, the advanced fractured rock of starter, and shock loading passed on and drive revolution to ring-type with while pipe bit, realizes concentric detritus, with managing and protecting wall, reacting cycle deslagging three operations is carried out simultaneously.Two gas circuit structure can cool the meshing gold of ball of inside and outside drill bit simultaneously, improves drilling life of bit.Reacting cycle deslagging is lancing door bed rock bits effectively, avoid repetition broken, not easily stuck by landwaste when carrying brill.After pipe-following drilling terminates, do not need to change drilling tool, still can continue to implement reverse circulation drilling.This cover drilling tool structure is simple, and processing cost is low, long service life, and drilling efficiency is high.
Publication number CN102966304A discloses a kind of mud off air latent drift drilling tool and drilling technology, relates to a kind of mud off air latent drift drilling tool and drilling technology.Drilling tool is coaxial-type triple channel structure, internal layer drilling rod is provided with central passage, second passage is formed between internal layer drilling rod and intermediate layer drilling rod, the 3rd passage is formed between intermediate layer drilling rod and outer drilling rod, the 4th passage is defined between triple channel drilling tool and hole wall, for mud and compressed air independent loops in drilling well.Drilling tool outer tube adopts and is threaded, pipe grafting in two layers, and bonding strength is high, good seal performance, and unloading is convenient.Compressed air-driven shaft bottom down-hole hammer impacts detritus, and hard rock drilling efficiency can be made to improve more than ten times; And compressed air is in the circulation of down-hole equipment inner sealing, not by the impact that well depth and confined pressure change, blast and air demand significantly reduce, and avoid well head to pollute, and realize energy-conserving and environment-protective and low cost drilling well.Use mud drilling while air drilling, realize the available protecting to the borehole wall, various bad ground compliance is strengthened, guarantees drilling safety.
Publication number CN10186895A discloses a kind of positive-circulation drilling and dedusting technique of chamber down-hole hammer and double-wall pipe, what relate to is a kind of positive-circulation drilling and dedusting technique of chamber down-hole hammer and double-wall pipe, dust collection method in the hole that the direct circulation that this technology is specifically designed to the combination of common down-hole hammer double-wall pipe is crept into.Dust removal part realizes by sending water box, double-wall pipe, water spray to convert joint three part; Compared with this dust collection method creeps into dust collection method with other cavern's injected hole, simple and reliable for structure, good dedusting effect, and do not affect common down-hole hammer percussion drilling efficiency.When the tup of down-hole hammer starts percussion drilling, by water box, the water of certain pressure is sent in the annular gap of double-wall pipe, water enters water spray conversion joint by annular gap, the aperture that press water converts joint from circumferential arrangement at water spray sprays, form water smoke district, waste gas carries rock dust in the mixing of water smoke district, and the multiphase flow of the water of formation, gas and rock slag, along outside the annular gap tap between double-wall pipe and hole wall, realizes common down-hole hammer direct circulation rock drilling wet dust removal.
Publication number CN102943466 discloses a kind of miniature steel pipe concrete pile and penetrates base course strengthening soft foundation, the invention discloses a kind of miniature steel pipe concrete pile and penetrate base course strengthening soft foundation construction, belong to engineering construction technical field, solve traditional soft base processing mode and can not meet engineering construction rheobasic requirement over the ground, the problem that cannot carry out of constructing.Comprise the following steps: down-hole hammer eccentric rig is with pipe operation: geological drilling rig pore-forming: hydraulic vibration driver immersed tube; Pull out casing sleeve pipe: built-in slip casting pipe road, lay reinforcing cage; Perfusion high strength mixed material pile.
Publication number CN102912791A discloses a kind of work method of bored pile, provides a kind of construction method of bored pile, comprising: a) guide pile position, and assembling rig, is connected threaded drillpipe bottom with combined down-hole hammer, is fixed on stake position; Casing is moved to above rig, make casing by threaded drillpipe to the top of combined down-hole hammer bottom, protect letter and overlap with rig axis; B) drill power head connects and drives rig to rotate, and casing unit head connects and drives casing to rotate, and rig is contrary with casing direction of rotation; Start drill power head and casing unit head, then anvil head and casing creep into simultaneously vertically downward simultaneously; C) be drilled into design hole depth, rig is shifted out stake holes, reinforcing cage is installed in casing; D) Grouting Pipe is installed to above reinforcing cage, by Grouting Pipe to concrete perfusion in casing: and after e) having poured into, casing is extracted, castinplace pile coagulation forming.It is rapid that the method reduces work step, do not adopt process contamination environment to be a kind of bored pile construction method efficiently.
Publication number CN2356137Y discloses a kind of to heart reaming cover follow-up down-the-hole drilling equipment, object is to provide a kind of to heart reaming cover follow-up DTH drilling equipment, sleeve pipe can be with to follow up hole, overcome bit freezing phenomenon, to solve the problem being difficult to pore-forming at some complicated bottoms.
Publication number CN1766276A discloses the two-tube drilling tool of a kind of down-hole hammer and drilling method thereof, object is just to overcome above-mentioned the deficiencies in the prior art, provides a kind of and is suitable for the two-tube drilling tool of down-hole hammer that the loose sand ovum gravel bottoming without plastic structure and the complicated bottom that accompanies ooze layer and competent bed creep into and method thereof.
Publication number CN102852457A, CN202788610U disclose a kind of sleeve of down-the-hole hammer follow-up rig (two patents are identical, practical and inventing type), can squeeze into lithosphere fast.
Publication number CN102747951A discloses a kind of sleeve of down-the-hole hammer follow-up rig, down-hole hammer vibrates, downward boring, sleeve pipe bores with under down-hole hammer, when ground bits are spent from drilling rod depthkeeping, drilling rod and down-hole hammer is proposed, vibrating hammer gripper clamp unclamps, crossbeam and conduit are stayed underground, opens casing and remove a machine, descending reinforcing cage and concrete perfusion.
Publication number CN102828690A discloses a kind of walking double back and revolves down-hole hammer rig, and open CN202755890U discloses a kind of walking double back and revolves down-hole hammer rig (two patents are identical, practical and inventing type), cannot soil taking hole forming, pollution-free; Be applicable to the stratum that various geology and other machine have been difficult to, the complicated bottom such as sand bed, macadam, boulder as hard lithosphere, frozen soil layer, rich groundwater: operating efficiency is high.
Publication number CN202731741U discloses a kind of submersible pump type down-the-hole hammer reverse circulating trepan, hydraulic submersible slush pump is provided with between main drilling rod and the secondary drilling rod of double-walled, after pneumatic down-hole hammer smashes rock, rock debris is extracted out by hydraulic submersible slush pump, pneumatic down-hole hammer only needs tolerance and the air pressure of impact shock, rock debris does not need high pressure draught is lifted into well head, therefore, the air compressor machine of huge discharge is not needed to provide power for starting down-hole hammer, the air compressor machine of small displacement is only needed to provide power, greatly save the consumption of the energy, simple to operate, improve the operating speed of trepan, add drilling depth, improve operating efficiency.
Publication number CN102628268A, CN202559338U disclose a kind of cyclone pile, and (two patents are identical, practicality and inventing type), advantage is: deslagging and enter the problem of rock difficulty after solving unconsolidated formation air pressure down-hole hammer pore-forming, comprehensive benefit is 10-15 times of legacy equipment, substantially increases the pore-forming efficiency that Rock Region enters rock stake; Without traditional auxiliary material of mud, water, energy-conserving and environment-protective, rely on little to resources and environment.Long screw auger bridge carries capital equipment and moves to work place and locate; Opening power, air compressor machine produces blast, and pass to down-hole hammer power by air pipe, tup smashes rock stratum pore-forming, and blade row goes out dregs, after being drilled into desired depth, long screw drill rod and down-hole hammer drilling tool being proposed, draws hole operation and terminate; Another general long-spiral drilling machine adopts and normally pierces, at the bottom of guncreting to hole, and post-set reinforcing cage, pile.Use shows, this use is novel reaches designing requirement completely.
Publication number CN101100859A discloses a kind of pile base construction method and the equipment that embed rock, it is characterized in that comprising the following steps: 1) vibration dip retaining wall steel pipe: according to designing requirement determination pile position, pile driver is sling vertical cube of retaining wall steel pipe, to advance sink down into rock aspect with vibrator from steel pipe top; 2) Auger drilling fetches earth: creep into the long screw auger be connected with rotary drilling-head, and takes out the whole soil in steel pipe; 3) impactite rock layers: for the lithosphere of hardness at more than 35Mpa, unload long screw auger, unit head and tumbler, tube connector and binding type jumper bit are interconnected; The pressure-air of input intensity 5-8Kg/C ㎡ in jump bit, makes tup with the frequency bump kata-rocks rock layers of 850-1300 beat/min; 4) displacement is impacted: after above-mentioned impact grinding to certain depth, stop impacting, promote jump bit, start tumbler, after making binding type jumper bit rotational displacement certain angle, sink to proceeding bump fragmentation again, so constantly rotational displacement impact grinding, makes stake holes reach projected depth; 5) pneumaticly get rock slag: the survival gas after impactor breaks rock kicks up the rock dust slag in hole, falls in the surge drum on binding type jumper bit top, propose jump bit, open the discharge door on barrel, just detachable fall; 6) descending reinforcing cage: prefabricated reinforcing bar cage hoisting is entered in steel pipe; 7) fill with concrete: concrete perfusion in steel pipe, and extract retaining wall steel pipe simultaneously.
The down-hole hammer that publication number CN1419034A discloses a kind of loose broken stratum impacts static pressure with pipe boring method, the method be utilize down-hole hammer on sleeve pipe top impact and rig self to the static pressure of conduit, by a kind of drilling method in hand-hole under protection casing, the major impetus entered under sleeve pipe is the impact force of down-hole hammer, and the static pressure of rig helps out.
Publication number CN201330559Y discloses a kind of wind pressure drilling device of pneumatic down-hole hammer, and object is to provide a kind of drilling efficiency that improves, and contributes to rock dust, landwaste and gravel and discharges wind pressure drilling device of pneumatic down-hole hammer.
Above-mentioned disclosed patented technology some mainly improve the rock breaking capacity of down-hole hammer itself further, break the innovation of the aspects such as rock speed.Some is mainly to retaining wall, thoroughly exhaust, the deslagging in broken rock pore forming process further of down-hole hammer way-type drilling unit, the perfection and innovation of the technology such as environmental protection.
The above patent is constantly brought forth new ideas in down-hole hammer hole forming method, energy consumption, raising efficiency of construction, but still there is following defect: 1. described down-hole hammer and the function of down-hole hammer way-type drilling unit or stake machine thereof are only limitted to pore-forming, cannot disposal pore-forming and pile; 2. in pile foundation engineering, first use down-hole hammer technology or down-hole hammer way-type drilling unit technology pore-forming, then adopt other method pile, therefore, efficiency of construction is low or cost is higher.
The above patent is constantly brought forth new ideas in down-hole hammer hole forming method, energy consumption, raising efficiency of construction, but still there is following defect: 1. described down-hole hammer and the function of down-hole hammer way-type drilling unit or stake machine thereof are only limitted to pore-forming, cannot disposal pore-forming and pile; 2. in pile foundation engineering, first use down-hole hammer technology or down-hole hammer way-type drilling unit technology pore-forming, then adopt other method pile, therefore, efficiency of construction is low or cost is higher.
The object of the invention is to overcome the above-mentioned problems in the prior art and defect, provide a kind of can the combined down-hole hammer drilling tool of disposal pore-forming pile.
Another object of the present invention is to provide a kind of pile forming method utilizing combinations thereof formula down-hole hammer drilling tool, can make that pore-forming process is disposable to be completed, and operation is simple, speed is accelerated, and energy consumption is low.
For achieving the above object, combined down-hole hammer drilling tool provided by the present invention, comprises open type down-hole hammer, multilayer Dentate screw drilling rod, and open type down-hole hammer and multilayer Dentate screw drilling rod are fixed by pin, axle and sealing mat; The impactor of described open type down-hole hammer is designed to hollow type impactor, the movable bottom door that can close is provided with in the bottom of open type down-hole hammer, there is the function of slagging channel or concreting exit passageway, when down-hole hammer breaks rock, dump bottom doorway can be used as exhaust, deslagging import, the side of open type down-hole hammer arranges reaming block, arranges forced-draft hole, high pressure gas ash pit in the inside of open type down-hole hammer; Described multilayer Dentate screw drilling rod is made up of pipe in drilling rod outer tube and drilling rod, drilling rod outer tube is provided with air pipe, in drilling rod, pipe can be used as the passage of exhaust, deslagging and concreting, drilling tool is drilled into design end absolute altitude, the concrete of high pressure pumping delivers to bottom movable bottom door by hollow type impactor centre bore, and movable bottom door is opened, as the outlet of concreting pile, drilling tool carries while concreting, and drilling tool is mentioned pile driving construction and completed.Open type down-hole hammer is divided into three classes: the first kind is reverse circulation down-the-hole hammer; Equations of The Second Kind is direct circulation down-hole hammer; 3rd class is positive and negative bidirectional circulating down-hole hammer.
The internal diameter of the centre bore of described down-hole hammer impactor is greater than the internal diameter of pipe in drilling rod, be beneficial to concrete normally carry, when down-hole hammer breaks rock, the gas of discharging and dregs are discharged by hollow type impactor centre bore reacting cycle, after tup gets into absolute altitude at the bottom of design stake, the concrete of high pressure pumping delivers to bottom movable bottom door by hollow type impactor centre bore, completes concrete building.
The pile forming method of combined down-hole hammer drilling tool provided by the present invention, has following steps:
(1) rig, with pressurization and lifting appliance, unit head, air supply system, note lubricating oil system, multilayer Dentate screw drilling rod is walked construction location, select reverse circulation down-the-hole hammer or direct circulation down-hole hammer or positive and negative bidirectional circulating down-hole hammer, be connected with multilayer Dentate screw drilling rod and be fixed on unit head;
(2), air feed, oil supply system is closed, power start drill power head, drives combined down-hole hammer drilling tool, behind mating holes position, under pressurization, rotate forward extrusion soil pore-forming or soil taking hole forming under non-pressurised effect, be drilled into the soil layer of surface of bedrock or designing requirement, formation depth;
(3), start air supply system, open air pipe door, compressed air enters air pipe to down-hole hammer impactor by external high pressure sebific duct to carry out impact continuously and breaks ground (rock), open type down-hole hammer reversely rotates lower boring by rotating forward to change into, simultaneously down-hole hammer reaming block with the effect of hole wall frictional force under to rotate to down-hole hammer around reaming block axle and keep off mouth, form the down-the-hole tup expanded, reversely rotate also vertical impact to creep into simultaneously, until absolute altitude at the bottom of design stake, form top minor diameter hole body, bottom is major diameter hole body, or open type down-hole hammer continues to rotate forward and creeps into until design absolute altitude at the bottom of stake, form elongated equal diameter hole body, the gas of discharging and dregs can adopt reverse circulation down-the-hole hammer to enter pipe discharge in hollow type impactor and drilling rod by dodge gate entrance and return to ground or enter in dregs collector under the impact air pressure effect of impactor, or the screw thread slot discharge adopting direct circulation down-hole hammer to make the gas of discharge and dregs be expelled to Dentate screw drilling rod by the high pressure gas ash pit of down-hole hammer after closed dodge gate returns to ground or enters in dregs collector, or adopt positive and negative bidirectional circulating down-hole hammer to enter tube hub hole in hollow type impactor centre bore and drilling rod by down-hole hammer movable bottom door and discharge through threeway conversion head and discharge by down-hole hammer external exhaust gas road and by the screw thread slot of Dentate screw drilling rod return to ground or enter in dregs collector.
(4) after an absolute altitude at the bottom of, being drilled into, close air pipe door, open threeway conversion head, reversely rotate and up carry, the concrete of high pressure pumping enters pipe and hollow type impactor passage to down-hole hammer movable bottom door in drilling rod by threeway conversion head and goes out interruption-forming pile body or enlarged footing pile body until ground hole body size reducing place.
(5), continue to reversely rotate and carry drilling tool, down-hole hammer reaming block is received and is repositioned to original position, continue concreting to stake top, form top minor diameter pile body, bottom is major diameter pile body; Or changed into rotating forward by reverse rotation and carry drilling tool and continue concreting to stake top, form equal diameter pile body.
(6), after concrete casting complete, place reinforcing cage, form steel concrete equal diameter socketed pile or steel concrete reducing socketed pile (steel reinforced concrete expanding head socketed pile).
Adopt combined down-hole hammer drilling tool and the pile forming method thereof of technique scheme, have the following advantages:
1, construction adopts one-step pore-creating pile-formation process, and this working procedure is simple, easy and simple to handle, improves speed of application;
2, construction disposal pore-forming pile, saves energy consumption.
Fig. 1 is the structural representation of combined down-hole hammer drilling tool of the present invention.
Fig. 2 is the sectional drawing of combined down-hole hammer drilling tool of the present invention.
Fig. 3 is the top view of reacting cycle formula down-hole hammer.
Fig. 4 is the top view of direct circulation formula down-hole hammer.
Fig. 5 is the top view of positive and negative Bidirectional circulation down-hole hammer.
Fig. 6, Fig. 7, Fig. 8, Fig. 9, Figure 10, Figure 11, Figure 12, Figure 13, Figure 14, Figure 15 are the pile forming method schematic flow sheet of combined down-hole hammer drilling tool of the present invention.
In figure: 1, open type down-hole hammer; 2, multilayer Dentate screw drilling rod; 3, pipe in drilling rod; 4, hollow type impactor; 5, movable bottom door; 6, air pipe; 7, drilling rod outer tube; 8, alignment pin; 9, locating shaft; 10, reaming block; 11, forced-draft hole; 12, high pressure gas ash pit; 13, stake machine; 14, unit head; 15, threeway conversion head; 16, air pipe door; 17, pump machine; 18, material collecting tank; 19, air compressor machine; 20, limiting block mouth.
Below in conjunction with accompanying drawing, the invention will be further described.
In the structure shown in Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, combined down-hole hammer drilling tool designed by the present invention comprises open type down-hole hammer 1, multilayer Dentate screw drilling rod 2, and open type down-hole hammer and multilayer Dentate screw drilling rod are fixed by alignment pin 8, locating shaft 9 and sealing mat; The impactor of described open type down-hole hammer is designed to hollow type impactor 4, the internal diameter of its centre bore is greater than the internal diameter of pipe 3 in drilling rod, be beneficial to concrete normally carry, when down-hole hammer breaks rock, the gas of discharging and dregs are discharged by hollow type impactor centre bore reacting cycle, the movable bottom door 5 that can close is provided with in the bottom of open type down-hole hammer, there is the function of slagging channel or concreting exit passageway, the side of open type down-hole hammer arranges reaming block 10, arranges forced-draft hole 11, high pressure gas ash pit 12 in the inside of open type down-hole hammer; Described multilayer Dentate screw drilling rod 2 is made up of pipe 3 in drilling rod outer tube 7 and drilling rod, and drilling rod outer tube 7 is provided with air pipe 6, and in drilling rod, pipe 3 can be used as the passage of exhaust, deslagging and concreting.When down-hole hammer breaks rock, movable bottom door 5 can be used as exhaust, deslagging import, drilling tool is drilled into design end absolute altitude, the concrete of high pressure pumping delivers to bottom movable bottom door by hollow type impactor centre bore, movable bottom door 5 is opened, as the outlet of concreting pile, drilling tool carries while concreting, and drilling tool is mentioned pile driving construction and completed.Open type down-hole hammer is divided into three classes: the first kind is reverse circulation down-the-hole hammer; Equations of The Second Kind is direct circulation down-hole hammer; 3rd class is positive and negative bidirectional circulating down-hole hammer.
Combined down-hole hammer drilling tool pile forming method provided by the present invention, with reference to Fig. 6, Fig. 7, Fig. 8, Fig. 9, Figure 10, Figure 11, Figure 12, Figure 13, Figure 14, Figure 15, has following steps:
1. the rig 13 with pressurization and lifting appliance, unit head 14, air supply system 19, note lubricating oil system, multilayer Dentate screw drilling rod 2 is walked to construction location, and open type down-hole hammer 1 is connected with multilayer Dentate screw drilling rod 2 and is fixed on (see Fig. 6) on unit head 14;
2. air feed, oil supply system is closed, power start drill power head 14, drive combined down-hole hammer drilling tool, behind mating holes position, under pressurization, rotate forward extrusion soil pore-forming or soil taking hole forming under non-pressurised effect, be drilled into the soil layer of surface of bedrock or designing requirement, formation depth (see Fig. 7);
3. air supply system is started, open air pipe door 16, compressed air enters air pipe 6 by external high pressure sebific duct, open type down-hole hammer 1 reversely rotates lower boring by rotating forward to change into, simultaneously down-hole hammer reaming block 10 with the effect of hole wall frictional force under rotate to down-hole hammer limiting block mouth 20 around reaming block axle, form the down-the-hole tup expanded, reversely rotate also vertical impact to creep into simultaneously, until absolute altitude at the bottom of design stake, form top minor diameter hole body, bottom is major diameter hole body (see Fig. 9), or open type down-hole hammer continues to rotate forward and creeps into until design absolute altitude at the bottom of stake, form elongated equal diameter hole body (see Fig. 8).The gas of discharging and dregs can adopt reverse circulation down-the-hole hammer (Fig. 3) that the gas of discharge and dregs are discharged by pipe 3 in the centre bore of down-hole hammer bottom movable bottom door hollow type impactor 4 and drilling rod and return to ground or enter in dregs collector 18; Or the screw thread slot discharge adopting direct circulation down-hole hammer (Fig. 4) to make the gas of discharge and dregs be expelled to Dentate screw drilling rod by the high pressure gas ash pit 12 of down-hole hammer after closed dodge gate returns to ground or enters in dregs collector 18; Or adopt positive and negative bidirectional circulating down-hole hammer (Fig. 5) to enter pipe 3 in the centre bore of hollow type impactor 4 and drilling rod by down-hole hammer movable bottom door, discharge through threeway conversion head 15 and return to ground or enter in dregs collector 18;
4. after an absolute altitude at the bottom of being drilled into, close air pipe door 16, open threeway conversion head 15, reversely rotate and up carry, high pressure pumping of concrete to threeway conversion head 15 enters pipe 3 and hollow type impactor 4 centre bore to down-hole hammer movable bottom door 5 in drilling rod and goes out interruption-forming pile body (see Figure 10) or enlarged footing pile body until ground hole body size reducing place (see Figure 11);
5. continue to reversely rotate and carry drilling tool, down-hole hammer reaming block is received and is repositioned to original position, continue concreting to stake top, form top minor diameter pile body, bottom is major diameter pile body (see Figure 10); Or changed into rotating forward by reverse rotation and carry drilling tool and continue concreting to stake top, form equal diameter pile body.(see Figure 12)
6. after concrete casting complete, place reinforcing cage, form steel concrete socketed pile (Figure 13) or steel reinforced concrete expanding head socketed pile (Figure 14);
7. rig is walked next construction location, repeats above step (see Figure 15).
Step 1. split shed formula down-hole hammer except can using reverse circulation down-the-hole hammer (Fig. 3), direct circulation down-hole hammer (Fig. 4) can also be used or use positive and negative Two-way Cycle down-hole hammer (Fig. 5), should according to rock-soil layer optimum selecting.
Step 3. in the discharge mode of gas and dregs different modes can be taked to discharge according to the open type down-hole hammer pattern used, when using reverse circulation down-the-hole hammer (Fig. 3), the gas of discharge and dregs enter pipe 3 in the centre bore of hollow type impactor 4 and drilling rod by down-hole hammer bottom movable bottom door entrance and discharge and return to ground or enter in dregs collector 18; When using direct circulation down-hole hammer (Fig. 4), closed down-hole hammer bottom dodge gate, the screw thread slot discharge making the gas of discharge and dregs be expelled to Dentate screw drilling rod by the high pressure gas ash pit 12 of down-hole hammer returns to ground or enters in dregs collector 18; When using positive and negative bidirectional circulating down-hole hammer (Fig. 5), the gas of discharging and dregs enter pipe 3 in the centre bore of hollow type impactor 4 and drilling rod by down-hole hammer movable bottom door, the screw thread slot that remaining dregs is expelled to Dentate screw drilling rod by the high pressure gas ash pit 12 of down-hole hammer is discharged, discharge through threeway conversion head 15 and return to ground or enter in dregs collector 18, realize Two-way Cycle deslagging soil.
When the stake that 5. step is formed when designing requirement is equal-diameter pile, ignore this step.
In conjunction with above-described embodiment, describe the present invention, but by doing some suitable adjustment to the details of construction sequence, just within the scope of the invention, the construction method of various different types can be derived.
Claims (3)
1. a combined down-hole hammer drilling tool, comprises open type down-hole hammer, multilayer Dentate screw drilling rod, it is characterized in that: open type down-hole hammer and multilayer Dentate screw drilling rod are fixed by pin, axle and sealing mat; The impactor of described open type down-hole hammer is designed to hollow type impactor, the movable bottom door that can close is provided with in the bottom of open type down-hole hammer, the side of open type down-hole hammer arranges reaming block, arranges forced-draft hole, high pressure gas ash pit in the inside of open type down-hole hammer; Described multilayer Dentate screw drilling rod is made up of pipe in drilling rod outer tube and drilling rod, and drilling rod outer tube is provided with air pipe;
Multilayer Dentate screw drilling rod comprises drilling rod and multilayer toothed thread, and every layer of toothed thread comprises multiple detent projection; On the side face being around in drilling rod outer tube at multiple detent projection interval, form one deck toothed thread; On drilling rod outer tube, along the direction that drilling rod outer tube extends, successively interval be provided with multilayer toothed thread, and the corresponding described detent projection of adjacent two layers toothed thread is arranged along described drilling rod outer tube bearing of trend in identical upright position; Multiple detent projection in every layer of described toothed thread, the direction that the side face along described drilling rod outer tube extends, shifts to install successively.
2. combined down-hole hammer drilling tool according to claim 1, is characterized in that: the internal diameter of the centre bore of described down-hole hammer impactor is greater than the internal diameter of pipe in drilling rod.
3. utilize a pile forming method for the combined down-hole hammer drilling tool described in claim 1, it is characterized in that, its construction sequence comprises:
(1) rig, with pressurization and lifting appliance, unit head, air supply system, note lubricating oil system, multilayer Dentate screw drilling rod is walked construction location, select reverse circulation down-the-hole hammer or direct circulation down-hole hammer or positive and negative bidirectional circulating down-hole hammer, be connected with drilling rod and be fixed on unit head;
(2), air feed, oil supply system is closed, power start drill power head, drives combined down-hole hammer drilling tool, behind mating holes position, under pressurization, rotate forward extrusion soil pore-forming or soil taking hole forming under non-pressurised effect, be drilled into the soil layer of surface of bedrock or designing requirement, formation depth;
(3), air supply system is started, open air pipe door, compressed air enters air pipe to down-hole hammer impactor by external high pressure sebific duct to carry out impact continuously and breaks ground, open type down-hole hammer reversely rotates lower boring by rotating forward to change into, simultaneously down-hole hammer reaming block with the effect of hole wall frictional force under to rotate around reaming block axle and keep off mouth to down-hole hammer, form the down-the-hole tup expanded, reverse rotation simultaneously also vertical impact is crept into, until absolute altitude at the bottom of design stake, form hole body; The gas of discharging and dregs adopt reverse circulation down-the-hole hammer to enter pipe discharge in hollow type impactor and drilling rod by dodge gate entrance and return to ground or enter in dregs collector under the impact air pressure effect of impactor; Or the screw thread slot discharge adopting direct circulation down-hole hammer to make the gas of discharge and dregs be expelled to Dentate screw drilling rod by the high pressure gas ash pit of down-hole hammer after closed dodge gate returns to ground or enters in dregs collector; Or adopt positive and negative bidirectional circulating down-hole hammer to enter tube hub hole in hollow type impactor centre bore and drilling rod by down-hole hammer movable bottom door and discharge through threeway conversion head and discharge by down-hole hammer external exhaust gas road and by the screw thread slot of Dentate screw drilling rod to return to ground or enter in dregs collector;
(4) after an absolute altitude at the bottom of, being drilled into, close air pipe door, open threeway conversion head, reversely rotate and up carry, the concrete of high pressure pumping enters pipe and hollow type impactor passage to down-hole hammer movable bottom door in drilling rod by threeway conversion head and goes out interruption-forming pile body or enlarged footing pile body until ground hole body size reducing place;
(5), continue to reversely rotate and carry drilling tool, down-hole hammer reaming block is received and is repositioned to original position, continue concreting to stake top, form top minor diameter pile body, bottom is major diameter pile body; Or changed into rotating forward by reverse rotation and carry drilling tool and continue concreting to stake top, form equal diameter pile body;
(6), after concrete casting complete, place reinforcing cage, form steel concrete equal diameter socketed pile or steel concrete reducing socketed pile.
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