CN103244051A - Combined down-hole hammer drilling tool and pile forming construction method thereof - Google Patents
Combined down-hole hammer drilling tool and pile forming construction method thereof Download PDFInfo
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Abstract
The invention relates to a combined down-hole hammer drilling tool and a pile forming construction method thereof. The combined down-hole hammer drilling tool comprises an open type down-hole hammer and a multi-layer toothed threaded drill pipe which are fixed through pins, shafts and sealing gaskets. An impactor of the open type down-hole hammer is a hollow impactor, a movable bottom door capable of being closed is arranged at the bottom of the open type down-hole hammer, reaming blocks are arranged on sides of the open type down-hole hammer, and a pressure air supply hole and a high-pressure exhaust and slag-removing groove are disposed in the open type down-hole hammer. The multi-layer toothed threaded drill pipe is composed of a drill pipe outer tube and a drill pipe inner tube, and the drill pipe outer tube is provided with an air pipe. During pile forming, a pile driver of the combined down-hole hammer drilling tool rotates forward to enter a designed pile bottom elevation, the movable bottom door at the bottom of the down-hole hammer is opened, and concrete is delivered by a high-pressure pump to form a pile through the drill pipe inner tube and the hollow impactor. According to the combined down-hole hammer drilling tool, holes and piles can be formed once, the process of the pile forming construction method is simple, benefits are high, and energy is saved.
Description
Technical field
The invention belongs to building field, relate to a kind of drilling tool and become pile work method, but be specifically related to a kind of combined type down-the-hole hammer drill tool of one-step pore-creating pile and become pile work method.
Background technology
In recent years, continuous development along with China's building field, high level and super highrise building are more and more intensive, requirement to the basis is more and more higher, the foundation pile stake end in a lot of areas must embed the rock stratum certain depth and just can meet design requirement, for solving an embedding rock difficult problem, down-the-hole hammer technology is developed gradually in technical research field in recent years.
Domesticly since the eighties, surpass 100 multinomial patent research with down-the-hole hammer technology hole forming method, progressively developed into from simple employing down-the-hole hammer technology pore-forming and adopt the down-the-hole hammer with pipe combination pore-forming, improved the technical level of pore-forming in basement rock.
Publication number CN85107194A discloses the drilling method that a kind of supercharger drives the down-the-hole hammer, proposed to do first order compression by many low pressure, air compressor machine parallel connection, directly supply with supercharger and do second level compression, drive the work of down-the-hole hammer, utilize compressed air to press the problem that exists in the hole that is drilled in the low pressure pneumatics for power solves.
Publication number CN2066480U discloses the pneumatic down-hole hammer of the anti-circulation of a kind of wet type closed form, its purpose and task are to realize the heavy caliber gravel layer, the single head down-the-hole hammer of basement rock, hard rock drilling, the piston action area is big, low blast, closed form circulation, piston mass is big, property regulation is convenient, changes individual part and can change the impactor running parameter, prolongs bit life.Flushing liquor protection hole wall, the anti-deslagging that the circulates continous sampling that can instead circulate also can creep into comprehensively, and speed of fulfiling hole is fast, improves the drilling well operating efficiency, reduces job costs.
Publication number CN101319599A discloses a kind of side suction type reverse circulation drilling bit, the subject matter that exists in the hollow hammer hole application process is: drill bit disengaging hole spirit body expands rapidly in the process in strong suction hole, part gas carries the molecule rock dust and overflows from the annular gap of drilling tool boring, because the gas flow of outer czermak space is little, last inverted ventilation speed is not enough gets rid of boring with rock dust, rock dust is suspended on hole wall and is deposited in the step place that drilling tool is connected, not only cause losing of rock sample ore, and rock dust is piled up for a long time, when especially meeting water in the hole, cause problems such as undergauge and stick of tool easily.Its purpose just is at above-mentioned the deficiencies in the prior art, provides a kind of and carries granule landwaste rock dust czermak space effusion and undergauge of causing from holing outside to solve branch's gas, and stick of tool and part sample ore are lost the side-suction type circulation drill bit of problem.
Publication number CN101967955A discloses a kind of from revolution composition down-the-hole hammer and job practices, first technical problem of its required solution provides and a kind ofly makes the hard alloy head wearing and tearing on the drill hammer be tending towards balanced, can increase work efficiency and the combined type of the revolution certainly down-the-hole hammer in application life.Second technical problem that needs to solve provides this from the simple and quick job practices of the combined type down-the-hole hammer that revolves round the sun.Start the unit head of rig, drive drilling rod, the combined type down-the-hole that revolves round the sun certainly hammer is by turning clockwise, and behind the alignment hole position, starting air supply system provides air driven to form each impactor action of down-the-hole hammer from revolution; Unit head descends, and rotates high-frequency percussion drilling downwards while drive from the combined type down-the-hole hammer that revolves round the sun, and disintegrating slag is crossed the annular gap of drilling rod between hole wall with the exhaust circulation of impactor and is expelled to ground.Punch to desired depth, and abundant deslagging.Unit head upwards promotes, and the composition formula down-the-hole that revolves round the sun certainly hammer also is promoted to ground thereupon.Rig is put into the reinforcing cage concreting to mobile on one side in boring, after the general time solidifies, namely become beneath foundation pile.The rig next construction location of walking repeats above step.According to on-the-spot geological conditions and actual air feed parameter, to adjust the damping adjustable ring is installed, the reasonable distribution air-flow effectively utilizes energy, improves perforating efficiency.Except the drilling rod that can use hollow cylindrical, can also use the auger stem of hollow, peg graft by 2 bearing pins and sealing mat and combined type down-the-hole hammer and to punch after fixing, deslagging efficient is improved, drive in the process of combined type down-the-hole hammer rotary impact punching at unit head, the drill hammer of several minor diameter impactors when revolving round the sun thereupon, be subjected to the effect of formation resistance can also be around self axis rotation, acting and the wearing and tearing of impacting the hardness alloy head in the rotary head are tending towards balanced, increase work efficiency and application life.According to the present invention, it is supporting to use auger stem and combined type down-the-hole to hammer into shape, deslagging better effects if under the same conditions, and the dark hole of can sounding the night watches, more economical.
Publication number CN201786251U discloses a kind of combined type down-the-hole hammer, and publication number CN101949261A discloses a kind of combined type down-the-hole hammer and job practices, and two patents are identical, practicality and inventing type, and punching is after estimate the degree of depth, and abundant deslagging; Unit head upwards promotes, and combined type down-the-hole hammer also is 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 solidifies, namely becomes underground pile foundation.
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 provides a kind of comprehensive detritus heavy caliber combined drill, and the characteristics of this drill bit maximum are with impact detritus, cataclasite.Revolution detritus and tired Breaking Rock Mechanism etc. combine, and form comprehensive detritus efficient, increase combination down-the-hole hammer to the compliance on stratum.
Publication number CN202866644U discloses a kind of gear wheel, down-the-hole hammer way-type drilling unit, purpose is to have repeated wammel and reaming and repeat to creep into and proposed a kind of gear wheel at above-mentioned, down-the-hole hammer way-type drilling unit technical scheme has produced the compound commentaries on classics of a kind of new transfer and has advanced 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, owing to be provided with liquid supply box and liquid-supplying system in the increase of the basis of existing downhole hammer rock drilling machine, liquid is ejected from the cutter head bottom of dropping hammer together with compressed air, and described liquid both can be water, it also can be cement paste, swell soil or mortar, when water during as liquid, the cutter head of heating can obtain cooling, be conducive to improve its abrasion resistance, the working life of increasing work efficiency and guaranteeing to grow, when using cement paste, swell soil or mortar are during as liquid, can prevent the situation of caving in around the eyelet that oneself digs out, be conducive to safety in production, in addition, the dust that produces in the process of construction of punchinging can be effectively suppressed, the noise of construction period of punchinging also can greatly reduce, and when water sprayed discharge together with high pressure air, the speed of punchinging also can effectively improve, and had very strong practicality.
Publication number CN201090135Y discloses a kind of way-type drilling unit, comprises that the end has the hollow drill of pneumatic down hole hammer, and the internal sleeve of described hollow drill is equipped with the blast pipe that is connected with wind regime, and the air outlet of described blast pipe is connected with the air guide hole of down-the-hole hammer; Be coated with the outer pillar that the length of length and hollow drill adapts in the outside of described hollow drill, both ends and the hollow drill of described outer pillar are connected as a single entity.After being installed on the unit head by tie-plate above-mentioned drilling tool, down-the-hole hammer direct circulation vertical impact creeps into, compressed air is transferred to the down-the-hole hammer and drives its work done through inner blast pipe, the waste gas of discharging is discharged through the drill bit steam vent, the cooling drill bit, and carry the rock slag along hole wall and outside annular gap between the pillar return to the face of land, at this moment, outer pillar and hollow drill interlock are protected lonely wall integrity; Simultaneously, unit head drives hollow drill and pneumatic down hole hammer carries 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 the pneumatic down-hole hammer drilling apparatus, a kind of wind pressure drilling device of pneumatic down-hole hammer that creeps at macadam and sand pebble layer particularly, it is characterized in that wear-resistant sleeve of suit outside drilling rod, between this wear-resistant sleeve and drilling rod, be provided with clutch disk, be provided with the connection catcher at the two ends of this wear-resistant sleeve, the connection catcher at lower port place connects the taper closed section.Be provided with a fixedly connected disk between the middle part of wear-resistant sleeve and drilling rod, the connection catcher at the upper port place of wear-resistant sleeve connects one and seals disk, forms the compound drilling rod that improves wind speed in the boring.Perhaps respectively be provided with a clutch disk as wear-resistant sleeve asking of top, bottom and the drilling rod of wear-resistant sleeve, same fixed rack forms and drags for tube cell.Wind speed drags for tube cell with setting up to qigong down-the-hole hammer wind pressure drilling device of the present invention in the boring by improving, and can in time remove rock dust, landwaste and gravel in the boring, improves drilling efficiency greatly.
Publication number CN2555370Y discloses a kind of bushing type churn drilling tools, relates to the bushing type churn drilling tools of diamond oil geophysical exploration well.It is lowered to drilling tool and pneumatic down-hole hammer in the drilling rod that bores drift sand, gravel well section and the formed chamber of drill bit, constitute the ring cavity circulation canal between the inwall of saw bar and the drilling tool: the gentle tengential belt of dress gas tap on the drilling tool of ground, compressed air injects from the gas tengential belt, through gas tap, drilling tool, down-the-hole hammer, deliver to ground by the shaft bottom through the landwaste that the ring cavity passage gets off jarring.Jarring rock under high pressure draught impacts can drill rock well section, and 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 worker's method thereof, it is characterized in that a machine is by pile frame, last unit head, auger stem, following unit head, steel casing, pneumatic down-hole hammer, 30-60m.Air compressor machine and high pressure gas pipeline are formed.Its worker's method feature one is erection equipment, the 2nd, use the pneumatic down-hole hammer fractured rock, the broken back soil body, rock ballast by helical blade outside slag notch is discharged the stake hole, the 3rd, construction soil layer, layer of sand and gravel layer are used the steel cylinder-wall protecting, the present invention compared with prior art, have following remarkable advantage: this invention is when construction rock drilling bored pile, and not only cutting rate is fast, and is dry type, environmental protection construction, the job site is clean, mud-less pollution.
Publication number CN10195625A discloses the anti-circulation of a kind of down-the-hole hammer and has advanced drilling tool with pipe bit with one heart, relates to the anti-circulation of a kind of down-the-hole hammer and advances drilling tool with pipe bit with one heart.Be to be connected with starter with spline housing by the semicircle card by hollow type down-the-hole hammer, be provided with external splines in the axial direction and match with the internal spline of ring-shaped sleeve drill bit at starter, starter 3 is designed to anti-loop structure, and ring-type is suspended on the lower end of sleeve pipe by shoe with pipe bit.Compared with prior art, the leading fractured rock of starter, and shock loading passed on to ring-type drive revolution with the pipe bit time, realize concentric detritus, with manage and protect wall, counter three operations of deslagging that circulate are carried out simultaneously.Two gas circuit structures can cool off the meshing gold of ball of inside and outside drill bit simultaneously, improve drilling life of bit.Anti-circulation deslagging is lancing door bed rock bits effectively, avoid the repetition fragmentation, carry when boring difficult stuck by landwaste.After following pipe bit to advance to finish, need not 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, drilling efficiency height.
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, the internal layer drilling rod is provided with central passage, constitute second passage between internal layer drilling rod and the intermediate layer drilling rod, constitute the 3rd passage between intermediate layer drilling rod and the outer drilling rod, formed the 4th passage in the drilling well between triple channel drilling tool and the hole wall, for mud and compressed air independent loops.The drilling tool outer tube adopts and to be threaded, and pipe is pegged graft in two layers, the bonding strength height, and good seal performance, unloading is convenient.Compressed air-driven shaft bottom down-the-hole hammering blow detritus can make the hard rock drilling efficiency improve more than ten times; And compressed air is not subjected to the influence of well depth and confined pressure variation in the circulation of down-hole equipment inner sealing, and blast and air demand reduce significantly, and avoids well head to pollute, and realizes energy-conserving and environment-protective and low-cost drilling well.Use mud drilling in the time of air drilling, realize the effective protection to the borehole wall, various bad ground compliance are strengthened, guarantee 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, and this technology is specifically designed to dust collection method in the hole that the direct circulation of common down-the-hole hammer double-wall pipe combination creeps into.Dust removal part is by sending water box, double-wall pipe, water spray conversion joint three parts to realize; This dust collection method creeps into dust collection method with other cavern's injected hole and compares, simple and reliable for structure, good dedusting effect, and do not influence common down-the-hole hammering blow drilling efficiency.When the tup of down-the-hole hammer begins percussion drilling, the water of certain pressure is sent in the annular gap of double-wall pipe by the water box, water enters water spray conversion joint by annular gap, press water is from the aperture ejection of circumferential arrangement on water spray conversion joint, form the water smoke district, waste gas carries rock dust to be mixed in the water smoke district, outside the annular gap tap of the multiphase flow of the water of formation, gas and rock slag between double-wall pipe and hole wall, realizes common down-the-hole hammer direct circulation rock drilling wet dust removal.
Publication number CN102943466 discloses a kind of miniature steel pipe concrete pile and has penetrated the 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 the engineering construction technical field, solve traditional soft base processing mode and can not satisfy engineering construction rheobasic requirement over the ground, the problem that construction can't be carried out.May further comprise the steps: down-the-hole is hammered eccentric rig into shape with managing operation: geological drilling rig pore-forming: hydraulic vibration driver immersed tube; Pull out the casing sleeve pipe: pre-buried grouting pipe, lay reinforcing cage; Perfusion high strength mixed material pile.
Publication number CN102912791A discloses a kind of construction method of bored pile, and a kind of Bored Pile Construction method is provided, and comprising: a) guide pile position, and the assembling rig is connected the threaded drillpipe bottom with combined type down-the-hole hammer, be fixed on the stake position; Casing is moved to the rig top, make casing by the top of threaded drillpipe to combined type down-the-hole hammer bottom, protect letter and axially overlap with rig; B) drill power head connects and drives the rig rotation, and the casing unit head connects and drives the casing rotation, and rig is opposite with the casing direction of rotation; Start drill power head and casing unit head simultaneously, then anvil head and casing creep into simultaneously vertically downward; C) be drilled into the design hole depth, rig is shifted out a hole, reinforcing cage is installed in the casing; D) Grouting Pipe is installed to reinforcing cage top, by Grouting Pipe concrete perfusion in the casing: and e) after perfusion finishes, casing is extracted the castinplace pile coagulation forming.It is rapid that this method reduces work step, and the adopting process contaminated environment is not a kind of method of bored pile construction efficiently.
Publication number CN2356137Y discloses a kind of to heart reaming cover follow-up down-the-hole drilling equipment, purpose is to provide a kind of heart reaming cover follow-up down-the-hole hammer drill is advanced equipment, can be with sleeve pipe follow-up boring, overcome the bit freezing phenomenon, to solve the problem that is difficult to pore-forming at some complicated bottoms.
Publication number CN1766276A discloses a kind of down-the-hole and has hammered two-tube drilling tool and drilling method thereof into shape, purpose just is to overcome above-mentioned the deficiencies in the prior art, provides a kind of and is suitable for the sand ovum gravel bottoming of loose no plastic structure and accompanies the down-the-hole that the complicated bottom of ooze layer and competent bed creeps into hammering two-tube drilling tool and method thereof into shape.
Publication number CN102852457A, CN202788610U disclose a kind of down-the-hole hammer sleeve pipe follow-up rig (two patents are identical, practicality and inventing type), can squeeze into lithosphere fast.
Publication number CN102747951A discloses a kind of down-the-hole hammer sleeve pipe follow-up rig, the vibration of down-the-hole hammer, boring downwards, sleeve pipe bores down with the down-the-hole hammer, when the ground bits are spent from the drilling rod depthkeeping, drilling rod and down-the-hole hammer is proposed, the vibrating hammer gripper clamp unclamps, crossbeam and conduit are stayed underground, opened casing and remove a machine, descending reinforcing cage and concrete perfusion.
Publication number CN102828690A discloses the two down-the-hole hammer drill machines that circle round of a kind of walking, and open CN202755890U discloses the two down-the-hole hammer drill machines (two patents are identical, practicality and inventing type) that circle round of a kind of walking, can't soil taking hole forming, and pollution-free; Be applicable to the stratum that various geology and other machine are difficult to finish, as complicated bottoms such as the sand bed of hard lithosphere, frozen soil layer, rich groundwater, macadam, boulders: high efficiency.
Publication number CN202731741U discloses a kind of submersible pump formula down-the-hole hammer counterflush drilling machine, between main drilling rod and the secondary drilling rod of double-walled, be provided with the hydraulic pressure diving slurry pump, after pneumatic down-hole hammer smashes rock, the rock chip is extracted out by the hydraulic pressure diving slurry pump, pneumatic down-hole hammer only needs tolerance and the air pressure of impact shock, the rock chip does not need to lift well head on the high pressure draught, therefore, do not need the air compressor machine of big discharge capacity to provide power for starting the down-the-hole hammer, only need the air compressor machine of little discharge capacity to provide power to get final product, saved the consumption of the energy greatly, simple to operate, improve the operating speed of trepan, increased drilling depth, improved operating efficiency.
Publication number CN102628268A, CN202559338U disclose a kind of cyclone stake, and (two patents are identical, practicality and inventing type), advantage is: solved unconsolidated formation air pressure down-the-hole deslagging and go into the problem of rock difficulty behind the hole hammer out, comprehensive benefit be legacy equipment 10-15 doubly, improved the pore-forming efficiency that the rock stake is gone in the rock area greatly; Traditional auxiliary material of no mud, water, energy-conserving and environment-protective rely on little to resource and environment.The long screw auger bridge carries capital equipment and moves to the local and location of work; Opening power, air compressor machine produce blast, pass to down-the-hole hammer power by air pipe, and tup smashes the rock stratum pore-forming, and blade row goes out dregs, be drilled into desired depth after, long screw drill rod and down-the-hole hammer drill tool are proposed, draw hole operation end; Another general long-spiral drilling machine adopts and normally pierces, guncreting at the bottom of the hole, rearmounted reinforcing cage, pile.Use shows, this use is novel to reach designing requirement fully.
Publication number CN101100859A discloses a kind of pile base construction method and equipment that embeds rock, it is characterized in that comprising the following steps: 1) the heavy retaining wall steel pipe of vibration: determine the pile position according to designing requirement, pile driver vertical cube of the retaining wall steel pipe of slinging advances the rock aspect that sinks down into vibrator from steel pipe top; 2) the auger soil of keeping forging ahead: creep into the long screw auger that is connected with rotary drilling-head, and take out whole soil in the steel pipe; 3) impact lithosphere: for the lithosphere of hardness more than 35Mpa, unload long screw auger, unit head and tumbler, tube connector and cluster jump bit interconnect; The pressure-air of input intensity 5-8Kg/C ㎡ in the jump bit makes tup with 850-1300 time/minute frequency bump fractured rock layer; 4) displacement is impacted:, stop to impact in above-mentioned impact grinding to certain depth, promote jump bit, start tumbler, make cluster jump bit rotational displacement certain angle after, sink to proceeding the bump fragmentation again, so constantly the rotational displacement impact grinding makes a hole reach projected depth; 5) the pneumatic rock slag of getting: the survival gas behind the broken rock of impactor is kicked up the rock dust slag in the hole, falls in the surge drum on cluster jump bit top, proposes jump bit, opens the discharge door on the barrel, just detachablely falls; 6) descending reinforcing cage: prefabricated reinforcing bar cage hoisting is gone in the steel pipe; 7) concrete placing: concrete perfusion in the steel pipe, and extract the retaining wall steel pipe simultaneously.
Publication number CN1419034A discloses a kind of down-the-hole hammering blow static pressure of loose broken stratum with pipe bit hole method, this method is to utilize down-the-hole hammer at the impact on sleeve pipe top and rig self static pressure to conduit, with a kind of drilling method in the hand-hole under the protection casing, the major impetus that sleeve pipe is lowered to is the impact force of down-the-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 purpose provides a kind of drilling efficiency that improves, and helps rock dust, landwaste and gravel to discharge wind pressure drilling device of pneumatic down-hole hammer.
Some mainly is the innovation of aspects such as the rock breaking capacity that further improves down-the-hole hammer itself, broken rock speed for above-mentioned disclosed patented technology.Some mainly is further retaining wall, thoroughly exhaust, deslagging in broken rock pore forming process to down-the-hole hammer way-type drilling unit, the perfect and innovation of technology such as environmental protection.
The above patent down-the-hole hammer out hole method, energy consumption, raising efficiency of construction constantly bring forth new ideas, but still have following defective: 1. the function of described down-the-hole hammer and down-the-hole hammer way-type drilling unit thereof or stake machine only limits to pore-forming, can't disposal pore-forming and pile; 2. hammer way-type drilling unit technology pore-forming into shape with down-the-hole hammer technology or down-the-hole earlier in pile foundation engineering, adopt other method pile again, therefore, efficiency of construction is low or cost is higher.
Summary of the invention
The objective of the invention is in order to overcome the above-mentioned problems in the prior art and defective, but a kind of combined type down-the-hole hammer drill tool of disposal pore-forming pile is provided.
Another object of the present invention provides a kind of one-tenth pile work method that utilizes combinations thereof formula down-the-hole hammer drill tool, can make that the pore-forming formation of pile is disposable to be finished, and operation is simple, speed up, and energy consumption is low.
For achieving the above object, combined type down-the-hole hammer drill tool provided by the present invention comprises open type down-the-hole hammer, multilayer dentation threaded drillpipe, and open type down-the-hole hammer is fixed by pin, axle and sealing mat with multilayer dentation threaded drillpipe; The impactor of described open type down-the-hole hammer is designed to the hollow type impactor, being provided with in the bottom of open type down-the-hole hammer can closed movable bottom door, function with slagging channel or concreting exit passageway, movable bottom door mouth can be used as exhaust, deslagging import when the down-the-hole hammer broke rock, the side of open type down-the-hole hammer arranges the reaming piece, in the inside of open type down-the-hole hammer forced-draft hole, high pressure gas ash pit is set; Described multilayer dentation threaded drillpipe is made of pipe in drilling rod outer tube and the drilling rod, the drilling rod outer tube is provided with air pipe, pipe can be used as the passage of exhaust, deslagging and concreting in the drilling rod, drilling tool is drilled into design end absolute altitude, the concrete of high pressure pumping is delivered to the movable bottom door in bottom by hollow type impactor centre bore, and movable bottom door is opened, as the outlet of concreting pile, drilling tool is concreting while carrying, and drilling tool is mentioned pile driving construction and finished.Open type down-the-hole hammer is divided into three classes: the first kind is anti-circulation down-the-hole hammer; Second class is direct circulation down-the-hole hammer; The 3rd class is positive and negative two-way circulation down-the-hole hammer.
The internal diameter of the centre bore of described down-the-hole hammering blow device is greater than the internal diameter of pipe in the drilling rod, being beneficial to concrete normally carries, when the down-the-hole hammer breaks rock, the gas of discharging and dregs are by the anti-discharge that circulates of hollow type impactor centre bore, after tup gets into design stake end absolute altitude, the concrete of high pressure pumping is delivered to the movable bottom door in bottom by hollow type impactor centre bore, finishes concrete building.
The one-tenth pile work method of combined type down-the-hole hammer drill tool provided by the present invention has following steps:
(1), the rig that has pressurization and lifting appliance, unit head, air supply system, notes lubricating oil system, the multilayer dentation threaded drillpipe construction location of walking, select anti-circulation down-the-hole hammer or direct circulation down-the-hole hammer or positive and negative two-way circulation down-the-hole hammer, be connected with multilayer dentation threaded drillpipe and be fixed on the unit head;
(2), close air feed, oil supply system, the power start drill power head drives combined type down-the-hole hammer drill tool, behind the mating holes position, under pressurization, be rotated in the forward the extrusion soil pore-forming or under non-pressurised effect soil taking hole forming, be drilled into soil layer, the rock stratum degree of depth of basement rock surface or designing requirement;
(3), start air supply system, open the air pipe door, compressed air enters air pipe to down-the-hole hammering blow device by the external high pressure sebific duct and impacts break ground (rock) continuously, open type down-the-hole hammer bores by being rotated in the forward to change under the reverse rotation, simultaneously down-the-hole hammer reaming piece with the effect of hole wall frictional force under rotate to down-the-hole hammer retaining mouthful around reaming piece axle, form the down-the-hole tup that enlarges, reverse rotation simultaneously and vertical impact creep into, until design stake end absolute altitude, form top minor diameter hole body, the bottom is the major diameter hole body, perhaps the open type down-the-hole is hammered into shape to continue to be rotated in the forward and is crept into until a design stake end absolute altitude, form elongated equal diameter hole body, the gas of discharge and dregs can adopt anti-circulation down-the-hole hammer to enter in hollow type impactor and the drilling rod pipe by the dodge gate entrance under the impact air pressure effect of impactor and discharge and return ground or enter in the dregs gatherer; The screw thread slot that perhaps adopts direct circulation down-the-hole hammer to make the gas of discharge and the dregs high pressure gas ash pit by the down-the-hole hammer be expelled to the dentation threaded drillpipe behind the closed dodge gate is discharged and is returned ground or enter in the dregs gatherer; Perhaps adopt positive and negative two-way circulation down-the-hole hammer to enter in hollow type impactor centre bore and the drilling rod tube hub hole by the movable bottom door of down-the-hole hammer and discharge and hammer outside exhaust duct into shape and discharge by the screw thread slot of dentation threaded drillpipe by down-the-hole through the threeway conversion head and return ground or enter in the dregs gatherer.
(4), be drilled at the bottom of behind the absolute altitude, close the air pipe door, open the threeway conversion head, reverse rotation is up carried, and the concrete of high pressure pumping enters in the drilling rod pipe and hollow type impactor passage to the movable bottom door of down-the-hole hammer by the 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 carry drilling tool in the reverse rotation, down-the-hole hammer reaming piece is received is repositioned to original position, continue concreting to the stake top, form top minor diameter pile body, the bottom is the major diameter pile body; Or changed into being rotated in the forward by reverse rotation and carry drilling tool and continue concreting to the stake top, form the equal diameter pile body.
(6), treat the concrete casting complete after, place reinforcing cage, form steel concrete equal diameter socketed pile or steel concrete reducing socketed pile (steel concrete enlarged footing socketed pile).
Adopt the combined type down-the-hole hammer drill tool of technique scheme and become pile work method, have the following advantages:
1, the one-step pore-creating pile-formation process is adopted in construction, and this working procedure is simple, and is easy and simple to handle, improved speed of application;
2, construction disposal pore-forming pile, energy efficient.
Description of drawings
Fig. 1 is the structural representation of combined type down-the-hole hammer drill tool of the present invention.
Fig. 2 is the sectional drawing of combined type down-the-hole hammer drill tool of the present invention.
Fig. 3 is the top view of anti-circulating down-the-hole hammer.
Fig. 4 is the top view of direct circulation formula down-the-hole hammer.
Fig. 5 is the top view of positive and negative two-way circulating down-the-hole hammer.
Fig. 6, Fig. 7, Fig. 8, Fig. 9, Figure 10, Figure 11, Figure 12, Figure 13, Figure 14, Figure 15 are the one-tenth pile work method schematic flow sheet of combined type down-the-hole hammer drill tool of the present invention.
Among the figure: 1, open type down-the-hole hammer; 2, multilayer dentation threaded drillpipe; 3, pipe in the 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 piece; 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.
The specific embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
In Fig. 1, Fig. 2, Fig. 3, Fig. 4, structure shown in Figure 5, the designed combined type down-the-hole hammer drill tool of the present invention comprises open type down-the-hole hammer 1, multilayer dentation threaded drillpipe 2, and open type down-the-hole hammer is fixed by alignment pin 8, locating shaft 9 and sealing mat with multilayer dentation threaded drillpipe; The impactor of described open type down-the-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 the drilling rod, being beneficial to concrete normally carries, when the down-the-hole hammer breaks rock, the gas of discharging and dregs are by the anti-discharge that circulates of hollow type impactor centre bore, being provided with in the bottom of open type down-the-hole hammer can closed movable bottom door 5, function with slagging channel or concreting exit passageway, the side of open type down-the-hole hammer arranges reaming piece 10, in the inside of open type down-the-hole hammer forced-draft hole 11, high pressure gas ash pit 12 is set; Described multilayer dentation threaded drillpipe 2 is made of pipe 3 in drilling rod outer tube 7 and the drilling rod, and drilling rod outer tube 7 is provided with air pipe 6, and pipe 3 can be used as the passage of exhaust, deslagging and concreting in the drilling rod.Movable bottom door 5 can be used as exhaust, deslagging import when the down-the-hole hammer broke rock, drilling tool is drilled into design end absolute altitude, the concrete of high pressure pumping is delivered to the movable bottom door in bottom by hollow type impactor centre bore, movable bottom door 5 is opened, outlet as the concreting pile, drilling tool is concreting while carrying, and drilling tool is mentioned pile driving construction and finished.Open type down-the-hole hammer is divided into three classes: the first kind is anti-circulation down-the-hole hammer; Second class is direct circulation down-the-hole hammer; The 3rd class is positive and negative two-way circulation down-the-hole hammer.
Combined type down-the-hole hammer drill tool provided by the present invention becomes pile work method, 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. rig 13 walkings that have pressurization and lifting appliance, unit head 14, air supply system 19, annotate lubricating oil system, multilayer dentation threaded drillpipe 2 are to construction location, and open type down-the-hole hammer 1 is connected with multilayer dentation threaded drillpipe 2 and is fixed on (see figure 6) on the unit head 14;
2. close air feed, oil supply system, power start drill power head 14, drive combined type down-the-hole hammer drill tool, behind the mating holes position, under pressurization, be rotated in the forward the extrusion soil pore-forming or under non-pressurised effect soil taking hole forming, be drilled into soil layer, the rock stratum degree of depth (see figure 7) of basement rock surface or designing requirement;
3. start air supply system, open air pipe door 16, compressed air enters air pipe 6 by the external high pressure sebific duct, open type down-the-hole hammer 1 bores by being rotated in the forward to change under the reverse rotation, simultaneously down-the-hole hammer reaming piece 10 with the effect of hole wall frictional force under rotate to down-the-hole hammer limiting block mouth 20 around reaming piece axle, form the down-the-hole tup that enlarges, reverse rotation simultaneously and vertical impact creep into, until design stake end absolute altitude, form top minor diameter hole body, the bottom is major diameter hole body (see figure 9), and perhaps the open type down-the-hole is hammered into shape to continue to be rotated in the forward and crept into until a design stake end absolute altitude, forms elongated equal diameter hole body (see figure 8).The gas of discharging and dregs can adopt anti-circulation down-the-hole hammer (Fig. 3) make the gas of discharge and dregs by down-the-hole hammer bottom movable bottom door hollow type impactor 4 centre bore and drilling rod in pipe 3 discharge and return ground or enter in the dregs gatherer 18; The screw thread slot that perhaps adopts direct circulation down-the-hole hammer (Fig. 4) to make the gas of discharge and the dregs high pressure gas ash pit 12 by the down-the-hole hammer be expelled to the dentation threaded drillpipe behind the closed dodge gate is discharged and is returned ground or enter in the dregs gatherer 18; Perhaps adopt positive and negative two-way circulation down-the-hole hammer (Fig. 5) to enter in the centre bore of hollow type impactor 4 and the drilling rod by the movable bottom door of down-the-hole hammer and manage 3, discharge through threeway conversion head 15 and return ground or enter in the dregs gatherer 18;
4. at the bottom of being drilled into behind the absolute altitude, close air pipe door 16, open threeway conversion head 15, reverse rotation is up carried, and high pressure pumping of concrete to threeway conversion head 15 enters in the drilling rod pipe 3 and hollow type impactor 4 centre bores to the movable bottom door 5 of down-the-hole hammer and goes out interruption-forming pile body (see figure 10) or enlarged footing pile body until ground hole body size reducing place (seeing Figure 11);
5. continue to carry drilling tool in the reverse rotation, down-the-hole hammer reaming piece is received be repositioned to original position, continue concreting to the stake top, form top minor diameter pile body, the bottom is major diameter pile body (see figure 10); Or changed into being rotated in the forward by reverse rotation and carry drilling tool and continue concreting to the stake top, form the equal diameter pile body.(seeing Figure 12)
6. after treating the concrete casting complete, place reinforcing cage, form steel concrete socketed pile (Figure 13) or steel concrete enlarged footing socketed pile (Figure 14);
7. the rig next construction location of walking repeats above step (seeing Figure 15).
When the stake that 5. step forms when designing requirement is the equal diameter stake, ignore this step.
In conjunction with above-described embodiment, describe the present invention, but by to the details of construction sequence being done some suitable adjustment, just can derive the job practices of various different types within the scope of the invention.
Claims (3)
1. a combined type down-the-hole hammer drill tool comprises open type down-the-hole hammer, multilayer dentation threaded drillpipe, it is characterized in that: open type down-the-hole hammer is fixed by pin, axle and sealing mat with multilayer dentation threaded drillpipe; The impactor of described open type down-the-hole hammer is designed to the hollow type impactor, being provided with in the bottom of open type down-the-hole hammer can closed movable bottom door, the side of open type down-the-hole hammer arranges the reaming piece, in the inside of open type down-the-hole hammer forced-draft hole, high pressure gas ash pit is set; Described multilayer dentation threaded drillpipe is made of pipe in drilling rod outer tube and the drilling rod, and the drilling rod outer tube is provided with air pipe.
2. combined type down-the-hole hammer drill tool according to claim 1, it is characterized in that: the internal diameter of the centre bore of described down-the-hole hammering blow device is greater than the internal diameter of pipe in the drilling rod.
3. one-tenth pile work method that utilizes the described combined type down-the-hole hammer drill of claim 1 tool is characterized in that its construction sequence comprises:
(1), the rig that has pressurization and lifting appliance, unit head, air supply system, notes lubricating oil system, the multilayer dentation threaded drillpipe construction location of walking, select anti-circulation down-the-hole hammer or direct circulation down-the-hole hammer or positive and negative two-way circulation down-the-hole hammer, be connected with drilling rod and be fixed on the unit head;
(2), close air feed, oil supply system, the power start drill power head drives combined type down-the-hole hammer drill tool, behind the mating holes position, under pressurization, be rotated in the forward the extrusion soil pore-forming or under non-pressurised effect soil taking hole forming, be drilled into soil layer, the rock stratum degree of depth of basement rock surface or designing requirement;
(3), start air supply system, open the air pipe door, compressed air enters air pipe by the external high pressure sebific duct and impacts continuously to down-the-hole hammering blow device and break ground, open type down-the-hole hammer bores by being rotated in the forward to change under the reverse rotation, simultaneously down-the-hole hammer reaming piece with the effect of hole wall frictional force under rotate to down-the-hole hammer retaining mouthful around reaming piece axle, form the down-the-hole tup that enlarges, reverse rotation simultaneously and vertical impact creep into, until design stake end absolute altitude, form hole body; The gas of discharging and dregs can adopt anti-circulation down-the-hole hammer to enter in hollow type impactor and the drilling rod pipe by the dodge gate entrance under the impact air pressure effect of impactor and discharge and return ground or enter in the dregs gatherer; The screw thread slot that perhaps adopts direct circulation down-the-hole hammer to make the gas of discharge and the dregs high pressure gas ash pit by the down-the-hole hammer be expelled to the dentation threaded drillpipe behind the closed dodge gate is discharged and is returned ground or enter in the dregs gatherer; Perhaps adopt positive and negative two-way circulation down-the-hole hammer to enter in hollow type impactor centre bore and the drilling rod tube hub hole by the movable bottom door of down-the-hole hammer and discharge and hammer outside exhaust duct into shape and discharge by the screw thread slot of dentation threaded drillpipe by down-the-hole through the threeway conversion head and return ground or enter in the dregs gatherer;
(4), be drilled at the bottom of behind the absolute altitude, close the air pipe door, open the threeway conversion head, reverse rotation is up carried, and the concrete of high pressure pumping enters in the drilling rod pipe and hollow type impactor passage to the movable bottom door of down-the-hole hammer by the 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 carry drilling tool in the reverse rotation, down-the-hole hammer reaming piece is received is repositioned to original position, continue concreting to the stake top, form top minor diameter pile body, the bottom is the major diameter pile body; Or changed into being rotated in the forward by reverse rotation and carry drilling tool and continue concreting to the stake top, form the equal diameter pile body;
(6), treat the concrete casting complete after, place reinforcing cage, form steel concrete equal diameter socketed pile or steel concrete reducing socketed pile.
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