CN207296871U - The structure-improved of full-sleeve twist bit - Google Patents

Abstract

The utility model discloses a kind of structure-improved of full-sleeve twist bit, including double power head twist bit (2), casing (1) is installed on double power head twist bit, its rotating lower power head (4) can be made by being detachably provided with described sleeve pipe, and lower power head top is provided with power head (5)；Upper power head is detachably connected with the auger stem (6) that can be moved up and down in casing, and the lower end of auger stem is connected with can be in the device for drilling of set in-pipe；Integrally formed with spiral component (3) at least part sleeve outer wall, wherein, the hand of spiral of the spiral component is opposite with the hand of spiral of the auger stem.This drilling machine improves simple and durable, utilize the full-sleeve twist bit with this structure and this case construction works, under existing mechanical equipment dynamic condition, in formation, large-diameter thread stake screw-type shaped pile can be made to be more in line with the demand that structures increasingly increase pile bearing capacity at this stage.

Description

The structure-improved of full-sleeve twist bit

Technical field

A kind of structure-improved is the utility model is related to, is specifically a kind of structure-improved of full-sleeve twist bit, belongs to and build Build field of engineering technology.

Background technology

With social development, land resource is deficient, and building gradually develops to high level.Building, structures load are more next It is bigger so that have compared with the pile-type of high-bearing capacity and the engineering method of pile and forming machinery, largely used in foundation engineering, its All kinds of screw cast-in-place piles of middle intermediate diameter and large-diameter bored pile application are especially extensive.

Research of the China in terms of screw cast-in-place pile is carried out in nineteen nineties, has emerged various pile types so far With engineering method.According to it was verified that under equal conditions, when stake becomes arachnoid in soil, pile side resistance is the resistance of Uniform-section Piles side Carry 1-2 times of power, therefore Screw Pile has the economic value and practical value of higher.

For buildings such as high-rise, Super High and bridges, because its structure load is excessive, height is required to bearing capacity of single pile, Gu use various types of large diameter bored piles more.Construct by using the large-section in-situ concrete pile of pile in full-sleeve, pipe Machinery and pile making method, can efficiently avoid waste and the problem of environmental pollution of cast-in-situ bored pile mud off generation, The large-section in-situ concrete pile formed compares the cast-in-situ bored pile of mud off, without stake end loosened soil, does not have mudcake effect, and Whole casing retaining wall, is not in broken pile, necking in complex random systems such as what soil, loose soil beds, under equal conditions, necessarily Pouring pile bearing capacity is improved to degree, and speed of application is fast, has higher economic benefit.

The pile making method of screw cast-in-place pile is mostly soil compaction pile in the prior art.Patent name is perfusion screw pile forming work Skill (the patent No.：And semi-screw pile and its pile forming method (patent No. 9611960265)：03128265.2) auger is utilized Machine creeps into drilling rod synchronous rotary, and then synchronous backward rotation, which carries, bores simultaneous pumping concrete and form Screw Pile or semi-screw pile Thread segment.Because pile making method is soil compaction pile, has higher requirements, can not be formed under existing machinery dynamic condition to drilling machine power Larger diameter Screw Pile, so Screw Pile or semi-screw pile are mostly minor diameter, or intermediate diameter pile-type (stake footpath for 400mm- 600mm).Limited by its footpath, its bearing capacity of single pile is relatively low, and high-rise or high-rise building can not be met to Pile Bearing Capacity Demand, therefore application range is relatively narrow.

Patent No. 200610138353.3 discloses a kind of double power head twist bit and its construction method, this method are led to Crossing allows lower power head to be slided up and down outside casing, drives revoling tube in the optional position of casing, there is provided a kind of center of gravity It is low, the high double driving head drilling machine structure of stability.But it creeps into the pile that fetches earth, the method by casing inside spin drilling rod and drill bit It is adapted to creep into compared with Soft Soil Layer, when running into hard soil layer and rock stratum, it is difficult to creep into pile.In addition, its pile utensil is cylinder Shape steel sleeve, and its tube drawing mode is non-rotating tube drawing, the bored concrete pile of formation irrigates for the cylindrical cross-section identical with casing Stake, this cylindrical cross-section grout pile week collateral resistance is relatively low, therefore its pile bearing capacity is not lifted compared to more traditional bored concrete pile, warp Benefit of helping is poor.And its lifted casing during, using it is non-rotating it is quiet pull out technique, casing is not engaged with pile peripheral earth to be passed through Rotation produces upward moment of torsion, only relies on drilling machine and carries lifting means, it is difficult to larger diameter casing be extracted from soil, so this is applied Construction equipment and technique are not only difficult to the tube drawing pile in relatively viscous or hard soil layer and are irrigated it is even more impossible to adapt to larger diameter full-sleeve The construction demand of stake.

Patent No. 201210351079.3 discloses a kind of walking double back rotation down-the-hole drill, using down-the-hole hammering blow into The object such as dregs, rock slag is blowed to top auger stem and passed through by hole, lower power head connecting sleeve rotation follow-up, hammer bottom gases at high pressure Outside auger stem drain sleeve.For this equipment in frozen soil layer, lithosphere, cobble, boulder and hard soil layer, rate of penetration is fast, Work efficiency is high, but because its pile utensil is still cylindrical steel casing, can not produce upward moment of torsion lifting casing by rotating, Therefore it is mostly to utilize vibration hammer and crane vibration pipe-drawing that it, which puies forward pipe mode, process is complex, and efficiency is relatively low, and it forms filling Note stake is the cylindrical Uniform-section Piles identical with casing, and pile side resistance is smaller, and stake floor space is only equal to down-hole hammer bottom and covers Tube bottom area, bottom can not carry out reaming again, and pile vertical carrying capacity is further improved by increasing stake floor space.

Patent No. 201410814937.2 discloses a kind of construction method of a full set of squeezed bored concrete pile of tube vibration, using shaking Dynamic hammer is running into lithosphere by casing press-in soil, and boulder bed is difficult to cover when hard soil layer merely with vibration hammer machine power of shaking Pipe is pressed into.After casing sinks, soil in machinery or manual cleaning casing is recycled, immersed tube is divided into two steppings with clear soil OK, effect is slow, and the construction time is long.After the soil body cleans out in casing, using vibrate reamer to pile bottom hole portion into Row vibration reaming, the method are squeezed hole, and stake bottom is mostly that geology is more hard in hard soil layer and lithosphere for holding force stratum Firmly, it is closely knit, it is difficult to by vibrate it is squeezed in the form of form stake bottom enlarged footing.

Above equipment and pile making method are that relatively conventional and efficiency and economic interests are higher in full-sleeve revolution pile making method Device and method.Though existing full-sleeve revolution overcomes multinomial in large-section in-situ concrete pile construction into drill mechanical with pile making method Problem, but the large-section in-situ concrete pile formed is cross-section linear pattern bored concrete pile, can not form concrete thread by pile body Improve bored concrete pile survey resistance, also can not in the hard soil layer in stake bottom, rock stratum second reaming, by increase stake floor space increase perfusion End resistance, so that further lifting perfusion pile vertical carrying capacity.Therefore architecture field urgently it is a kind of under equal conditions, bearing capacity Higher, concrete materials are less, adapt to national energy-saving, environmental protection policy requires and disclosure satisfy that building to pile bearing capacity demand day The Novel major diameter bored concrete pile of benefit increase.

Utility model content

In order to solve the above-mentioned technical problem, the purpose of this utility model is to provide a kind of improvement of full-sleeve twist bit Structure, double dynamical drilling used in the structure-improved, significantly increases the driving ability of equipment so that move in existing machinery In under the conditions of power, the full-sleeve Screw Pile of major diameter be constructed into for reality, in terms of pile foundation construction, achieve breakthrough Progress.

The utility model is achieved through the following technical solutions above-mentioned purpose：A kind of improvement knot of full-sleeve twist bit Structure, including double power head twist bit, are provided with casing on the double power head twist bit, are detachably installed in described sleeve pipe Its rotating lower power head can be made by having, and the lower power head top is provided with power head；

The upper power head is detachably connected with the auger stem that can be moved up and down in described sleeve pipe, described spiral The lower end of drilling rod is connected with the device for drilling that can be moved in described sleeve pipe,

Integrally formed with spiral component on described sleeve pipe at least part outer wall, wherein, the hand of spiral of the spiral component It is opposite with the hand of spiral of the auger stem.

Further, the device for drilling is one kind in down-hole hammer and drill bit.

Further, described sleeve pipe 1 is detachably connected including at least two casings and forms, one end of any described sleeve pipe With the lower power head detachable connection；The auger stem includes at least two drilling rods for carrying helical blade, and adjacent Drilling rod between detachable connection.

Further, the thickness of at least partly described spiral component is not less than 3 centimetres；At least partly described spiral component is vertical It is not less than 3 centimetres in the height of described sleeve pipe；At least partly described spiral component section is trapezoidal, and its root thickness is more than top Portion's thickness.

A kind of full-sleeve full-rotation is made a connection, and the casing with spiral component is provided with the full-sleeve full-rotation favourable turn.

A kind of full-sleeve screw cast-in-place pile construction method, the construction method include the following steps：

1) casing with spiral component and the auger stem with device for drilling are aligned using double power head twist bit Stake position, the power head driving auger stem is rotated by its helical blade direction in startups, is crept into using device for drilling, started at the same time Lower power head driving described sleeve pipe follows up according to being rotated with the auger stem opposite direction, and the auger stem is by the drilling Device upwards with rock slag discharge outside described sleeve pipe by the derived soil body；

2) treat described sleeve pipe drilling to completion, and by the soil body in described sleeve pipe and rock slag remove it is clean after, described in closing Lower power head and the upper power head, described sleeve pipe of stopping rotating and the auger stem, by described in auger stem proposition Casing and the lower power head, and remove the auger stem；

3) steel reinforcement cage is put into described sleeve pipe, and concrete is poured into a mould into described sleeve pipe, treat that concrete is poured into predetermined height After degree, the auger stem is put back on described sleeve pipe inner concrete and steel reinforcement cage, starts lower power head and presses and described sleeve pipe rotation Opposite direction rotates and upgrades when turning drilling；

4) during described sleeve pipe is lifted, the spiral component rotating clutch, the shearing stake holes hole wall soil body, produce auxiliary The upward moment of torsion of lifting casing is helped, and forms stake holes inner thread space；Described sleeve pipe inner concrete flows into stake holes and fills out at the same time The screw thread space on hole wall is filled, until described sleeve pipe proposes ground completely, forms the full-sleeve spiral shell that pile body carries concrete thread Line bored concrete pile.

Further, if required pile depth is more than pile frame height, in immersed tube and drilling process, separate the lower power head with The connection of described sleeve pipe, the upper power head and the auger stem；An at least casing is accessed by detachable connection And auger stem, then the lower power head and described sleeve pipe, the upper power head and auger stem are connected respectively, then Continue to creep into, after the completion of drilling, should first remove and be followed by auger stem, then the auger stem is proposed into described sleeve pipe and is removed. During described sleeve pipe pile is rotated and upgraded, access casing proposes ground completely after and pipe inner concrete stream completely is net Afterwards, it should suspend and carry pipe, after casing dismounting is accessed by after, continuing rotation carries tunica pipe, until proposition ground, and rotate and carry completely Can supplementary irrigation concrete as needed during pipe.

A kind of full-sleeve screw cast-in-place pile construction method, the construction method include：

1) full-sleeve full-rotation drill with spiral component is moved into stake position, by described sleeve pipe align piles position；

2) start full-sleeve full-rotation drill, described sleeve pipe is rotated into press-in soil according to the spiral component hand of spiral In, the soil body in described sleeve pipe and rock slag are cleared out into casing using the auxiliary drilling equipment that fetches earth, until described sleeve pipe rotary drilling is extremely Required depth, and after being cleaned out in casing, stop drilling；

3) steel reinforcement cage is put into casing, and pours into a mould concrete, after concrete is poured into predetermined altitude, opposite direction rotation Described sleeve pipe is lifted, for the spiral component during rotating and upgrading, rotating clutch, the shearing stake holes soil body, produce upward moment of torsion Described sleeve pipe is lifted, and screw thread space is formed in stake holes hole wall, while described sleeve pipe inner concrete flows into stake holes and fills rapidly Screw thread space on hole wall, until described sleeve pipe proposes ground, forms full-sleeve screw cast-in-place pile；

4), can supplementary irrigation concrete as needed during rotation carries pipe.

Preferably, when described sleeve pipe is crept into stake bottom hard stratum or rock stratum, the spiral component rotational shear stake is utilized Hole hole wall, carries out second reaming to stake holes, forms bored concrete pile lower part enlarged footing part.

Preferably, when described sleeve pipe is crept into projected depth, after mixed and disorderly substances in pipe is removed totally, can directly be poured in pipe Concrete, after the completion for the treatment of that rotation carries pipe pile, forms plain concrete full-sleeve screw cast-in-place pile or using postposition method insertion steel Muscle cage, forms armored concrete full-sleeve screw cast-in-place pile.

The beneficial effects of the utility model are：Spiral shell with certain thickness and height is set on the structure-improved sleeve outer wall Component is revolved, stake holes surrounding soil can be engaged by screw type in sleeve rotating drilling, lifting, produce and turn round downwards or upwards Square, when sleeve rotating is lifted, shears hole wall, forms the screw thread space with certain thickness and depth.Spiral component can be Helical blade, helical blade are more easy to shearing in drilling and enter the soil body, reduce drilling difficulty, spiral component can also be dentation structure Part is arranged in a combination by helical trajectory, and the screw thread space of detent mechanism Combined spiral member shears is more regular, reliably, spiral shell Rotation component can also be the combination of helical blade and detent mechanism, by the needs of construction pile-type, determine both height.Constructing Middle different according to soil layer, its thickness, highly designs thread thickness, the spiral component of height can be true equal to or more than Screw Pile Guarantor's construction under various geological environments forms Screw Pile threaded form and meets design requirement.Casing external spiral member lower is complete Portion is trapezoidal configuration, it is also constructed in echelon in the screw thread space of stake holes inner wall shearing shaping and Screw Pile pile body thread, root The trapezoidal thread construction that thickness is more than top thickness is not easy by native failure by shear so that screw thread quality of pile is more stable, reliably.Cause Screw Pile thread form, includes the form of thread height, thickness, thread cross sectional shape and sleeve outer wall lowermost part spiral component It is closest, so casing part spiral component should have certain altitude, thickness and should be trapezium structure.When using drilling machine For double power head twist bit when, in drilling process, casing and casing inside spin drilling rod press respective hand of spiral rotary drilling, Because of its hand of spiral on the contrary, direction of rotation is also on the contrary, opposite direction of rotation, can make auger stem more easily when it creeps into By outside soil in casing or the object drain sleeve such as rock slag.Double dynamical drilling used by this case equipment and works, greatly increase The drilling ability of equipment, casing inside spin drilling rod and down-hole hammer or drill bit drilling and forming hole, form screw pile core space, casing Reaming is rotated, telescoping screw component rotational shear stake holes hole wall forms screw thread space so that in existing machinery equipment dynamic condition Under, in, large calibre threads pile driving construction become reality, achieve breakthrough in terms of special-shaped pile foundation construction.This case institute It is down-hole hammer or drill bit to state auger stem lower part device for drilling, can flexibly be selected according to geological condition, compared with hard stratum, cobble, gravel Rock layers, or when needing to enter rock stratum, auger stem connection down-hole hammer is selected, using down-hole hammer impact holing, increase equipment is in heavily fortified point Driving ability in hard stratum, accelerates into rock speed；When constructing compared with Soft Soil Layer, auger stem connection drill bit may be selected, can carry Rise the speed for the drilling that fetches earth in weak soil.And in this case equipment structure-improved, lower power head and casing, upper power head and auger Bar is to be detachably connected, and casing can be that at least two casings are detachably connected and form, and auger stem can also be more bands The drilling rod for having helical blade, which is detachably connected, to be formed, the structure and connection mode of this casing and auger stem so that constructing During, the casing and auger stem length of actual use can be higher than pile frame height, and then depth of pore forming can be more than pile frame Height, therefore this structure-improved breaches dependence of the pile depth for pile frame height, by drilling process, addition set Pipe, auger stem, on the premise of pile frame height is not increased, increase equipment pile drilling depth, effectively prevent excessive pile frame Caused by increase machine cost, and in the construction process, because of pile frame, to cross high stability poor, and the disadvantages such as rollover easily occur, are transporting During defeated, for less pile frame easy to handling, required vehicle is less, has greatly saved cost of transportation.

This structure-improved simple and durable, utilizes the double power head twist bit with this structure and this case construction works institute shape Into full-sleeve screw cast-in-place pile, stake diameter up to 800mm -3000mm, Screw Pile compare equivalent diameter cross-section perfusion Stake, not only bearing capacity, which has, is significantly lifted, but also concrete square amount needed for pile body is only all kinds of perfusions of equivalent diameter cross-section 60% or so of stake, meets national energy-saving emission reduction policy.This case full-sleeve screw cast-in-place pile, not only passes through stake and Pile side soil screw thread Pile side resistance is greatly improved in formula occlusion, is doing embedded rock pile, or when pile bottom force holding layer is harder soil layer, can pass through casing External spiral component further lifts an end load power, so that entirely to rock or hard soil layer second reaming by expanding stake basal cross section Pile bearing capacity is improved in face, makes full use of major diameter concrete strength of pile, obtains the economic benefit of higher.

Spiral component with certain thickness and height is set on the structure-improved sleeve outer wall, is specially that sleeve outer wall is complete The spiral component in portion or the part helix component thickness D and spiral component height H of close sleeve outer wall lower part are not less than 3cm, Spiral component can be turned round downwards or upwards in screw type occlusion stake holes surrounding soil, generation in sleeve rotating drilling, lifting Square, when sleeve rotating is lifted, has certain thickness and the spiral component of height shearing hole wall, formation has certain thickness and depth The screw thread space of degree, the screw thread pile body thread that such spiral space is formed are not easy by native punching failure.

Brief description of the drawings

Fig. 1 is the utility model double power head twist bit structure-improved schematic diagram；

Fig. 2 is the utility model full-sleeve full-rotation drill and the drilling ancillary equipment combining structure schematic diagram that fetches earth；

Fig. 3 is schematic diagram when the utility model full-sleeve twist bit spiral component is helical blade；

Fig. 4 is that the utility model full-sleeve twist bit spiral component is single or multiple dentation structures, and spiral component is cut Schematic diagram when face is ladder shape part；

Fig. 5 is that the utility model full-sleeve twist bit spiral component is that helical blade and detent mechanism are illustrated when combining Figure；

Fig. 6 fetches earth drilling equipment group for the auxiliary such as the utility model full-sleeve full-rotation twist bit and churning driven or grab bucket Close construction method schematic diagram；

Fig. 7 is the utility model double power head twist bit, pile making method schematic diagram during auger stem connection drill bit；

Fig. 8 is the utility model double power head twist bit, auger stem connection down-hole hammer, and adjunction set in drilling process The construction method schematic diagram of pipe and auger stem；

Fig. 9 is that the utility model full-sleeve Screw Pile forms the construction method schematic diagram of enlarged footing at stake bottom

Figure 10 is the utility model full-sleeve reducing screw thread pile construction method schematic diagram；

Figure 11 is the utility model full-sleeve semi-screw pile construction method schematic diagram；

Figure 12 connects drill bit structure schematic diagram for the utility model auger stem；

In figure：1st, casing, 2, double power head twist bit, 3, spiral component, 3-1, detent mechanism, 4, lower power head, 5, Upper power head, 6, auger stem, 7, auxiliary fetch earth drilling equipment, 8, down-hole hammer, 9, drill bit, 10 full-sleeve full-rotation drills, H spiral shells Revolve member height, D spiral component thickness, D1 spiral component root thickness, D2 spiral component top thickness.

Embodiment

The following is a combination of the drawings in the embodiments of the present utility model, and the technical scheme in the embodiment of the utility model is carried out Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are without making creative work All other embodiments obtained, shall fall within the protection scope of the present invention.

As shown in Figure 1：A kind of structure-improved of full-sleeve twist bit, including double power head twist bit 2, it is described double acting Casing 1 is installed, its rotating lower power head 4, institute can be made by being detachably provided with described sleeve pipe 1 on power head twist bit 2 State lower 4 top of power head and be provided with power head 5；

The upper power head 5 is detachably connected with the auger stem 6 that can be moved up and down in described sleeve pipe 1, described The lower end of auger stem 6 is connected with the device for drilling that can be moved in described sleeve pipe 1；Wherein, the device for drilling is either latent Drift 7 or be drill bit 8, as shown in figure 12.

Integrally formed with spiral component 3 on 1 at least part outer wall of described sleeve pipe, wherein, the spiral side of the spiral component 3 To opposite with the hand of spiral of the auger stem 6.

The spiral component 3 can be helical blade or include at least a detent mechanism 3-1, or spiral Blade is combined together with detent mechanism 3-1.

Described sleeve pipe 1 is detachably connected including at least two casings and forms, one end of any described sleeve pipe 1 can with it is described Lower 4 detachable connection of power head；The auger stem 6 includes at least two drilling rods for carrying helical blade, and adjacent brill Detachable connection between bar.

The thickness of at least partly described spiral component 3 is not less than 3 centimetres；At least partly described spiral component is perpendicular to described The height of casing 1 is not less than 3 centimetres；At least partly described 3 section of spiral component is trapezoidal, and its root thickness is more than top thickness Degree.

A kind of full-sleeve full-rotation favourable turn 10, is provided with spiral component 3 on the full-sleeve full-rotation favourable turn 10 Casing 1.

A kind of full-sleeve screw cast-in-place pile construction method, the construction method include the following steps：

1) double power head twist bit 2 is utilized by the casing 1 with spiral component 3 and the auger stem 6 with device for drilling Align piles position, power head 5 drives the auger stem 6 to be rotated by its helical blade direction in startup, is crept into using device for drilling, together Power head 4 drives described sleeve pipe 1 to rotate follow-up according to the opposite direction of 6 rotary drilling of auger stem under Shi Qidong, described Auger stem 6 by the device for drilling, with rock slag discharge outside described sleeve pipe 1 upwards by the derived soil body；

2) treat 1 drilling to completion of described sleeve pipe, and by the soil body in described sleeve pipe and rock slag remove it is clean after, described in closing Lower power head 4 and the upper power head 5, described sleeve pipe of stopping rotating 1 and the auger stem 6, the auger stem 6 is proposed Described sleeve pipe 1 and the lower power head 4, then remove the auger stem 6；

3) steel reinforcement cage is put into described sleeve pipe 1, and concrete is poured into a mould into described sleeve pipe 1, it is predetermined to treat that concrete is poured into After height, the auger stem 6 is put back on 1 inner concrete of described sleeve pipe and steel reinforcement cage, starts lower power head and lifts the set Pipe 1, and rotated and upgraded by the direction opposite with during 1 rotary drilling of described sleeve pipe；

4) during described sleeve pipe 1 is lifted, 3 rotating clutch of spiral component, the shearing stake holes hole wall soil body, produce The upward moment of torsion of service hoisting casing, and form stake holes inner thread space；1 inner concrete of described sleeve pipe flows into stake holes simultaneously at the same time The screw thread space on hole wall is filled, until described sleeve pipe 1 proposes ground completely, forms the full-sleeve that pile body carries concrete thread Screw cast-in-place pile.

If required pile depth is more than pile frame highly, in immersed tube and drilling process, the lower power head 4 and the set are separated The connection of pipe 1, the upper power head 5 and the auger stem 6；Pass through detachable connection access at least a casing and spiral shell The lower power head 4, is then connected by rotary drill bar respectively with described sleeve pipe 1, the upper power head 5 with the auger stem 6, then Continue to creep into, after the completion of drilling, should first remove and be followed by auger stem, then the auger stem 6 is proposed into described sleeve pipe 1 and described Lower power 4 simultaneously removes during 1 pile of described sleeve pipe is rotated and upgraded, and casing is accessed after and is proposed completely in ground and pipe After concrete stream completely is net, rotation should be suspended and carry pipe, after access casing is removed by after, continuing rotation carries tunica pipe, until completely It is proposed ground, and rotate that carry during pipe can supplementary irrigation concrete as needed.

A kind of full-sleeve screw cast-in-place pile construction method, the construction method include：

1) full-sleeve full-rotation drill 10 with spiral component 3 is moved into stake position, by 1 align piles position of described sleeve pipe；

2) start full-sleeve full-rotation drill 10, described sleeve pipe 1 is rotated into pressure according to the hand of spiral of the spiral component 3 In burying, rock slag, the soil body in described sleeve pipe 1 are cleared out into casing using the auxiliary such as churning driven, the grab bucket drilling equipment that fetches earth, until institute 1 rotary drilling of casing is stated to required depth, and after being cleaned out in casing, stops drilling；

3) steel reinforcement cage is put into, and concrete is poured into a mould into casing, after concrete is poured into predetermined altitude, opposite direction rotation Described sleeve pipe 1 is lifted, during rotating and upgrading, rotating clutch, the shearing stake holes soil body, produce and turn round upwards the spiral component 3 Square lifts described sleeve pipe 1, and forms screw thread space in stake holes hole wall, while 1 inner concrete of described sleeve pipe flows into stake holes and rapid Screw thread space on hole wall is filled, until described sleeve pipe 1 proposes ground, forms full-sleeve screw cast-in-place pile；

4), can supplementary irrigation concrete as needed during rotation carries pipe.

When described sleeve pipe 1 is crept into stake bottom hard stratum or rock stratum, the 3 rotational shear stake holes hole of spiral component is utilized Wall, carries out second reaming to stake holes, forms bored concrete pile lower part enlarged footing part.

When described sleeve pipe 1 is crept into projected depth, after mixed and disorderly substances in pipe is removed totally, coagulation can be directly poured in pipe Soil, after the completion for the treatment of that rotation carries pipe pile, forms plain concrete full-sleeve screw cast-in-place pile or is inserted into steel reinforcement cage using postposition method, Form armored concrete full-sleeve screw cast-in-place pile.

Setting is opposite with the inner screw hand of spiral and with certain thickness, the spiral component of height outside casing.Spiral structure With auger stem sea whelk direction on the contrary, in drilling process, casing revolves the part hand of spiral with screw rod according to the respective hand of spiral Turn, produce downward moment of torsion drilling, each the hand of spiral is on the contrary, during drilling because of its, auger stem direction of rotation and sleeve rotating side To on the contrary, more conducively auger stem is by casing outside the object drain sleeve such as soil, rock slag.The spiral component of certain thickness, height Hole wall is sheared when sleeve rotating is lifted, forms the screw thread space with certain thickness and depth, can ensure to return in the soil body with it Concrete can be flowed into full of screw thread space before gushing, and form screw cast-in-place pile pile body thread, spiral component according to construction soil layer not Together, its thickness, highly designs thread thickness, height, it can be ensured that applied under various geological environments equal to or more than Screw Pile Work forms Screw Pile threaded form and meets design requirement.Casing external spiral component foot or all trapezoidal configurations, its The screw thread space of stake holes inner wall shearing shaping and Screw Pile pile body thread also construct in echelon, it is demonstrated experimentally that trapezoidal thread shearing resistance Cut that ability is stronger, trapezoidal pile body thread is not easy by native punching failure, so as to provide the pile side resistance of higher.In immersed tube and lifting During, by rotation, casing be engaged with surrounding soil produces downward or upward moment of torsion, considerably increase drilling machine creep into and The ability of casing is lifted, and in this case equipment structure-improved, casing and lower power head, auger stem is with upper power head can Dismantling connection, casing can also be that at least two casings are detachably connected and form, and auger stem can also be more with spiral The drilling rod of blade, which is detachably connected, to be formed, this structure breaches dependence of the pile depth to pile frame height, by drilling process In, casing and auger stem are added, on the premise of pile frame height is not increased, increases equipment pile drilling depth, effectively avoids In the construction process, stability is poor for excessive pile frame, and the disadvantage of the accidents such as rollover easily occurs.This case equipment structure-improved, structure Simple and durable, full-sleeve revolution screw thread drilling machine and this case construction works with this structure, can be with using the double dynamical drilling that fetches earth Hard soil layer or rock stratum are easily crept into, forms diameter bigger, the deeper priming concrete pile hole of depth is spiral using what is added outside casing Component, during pipe is carried, pile in pipe, manages outer formation grout pile body thread, by increasing seldom concrete dosage, further Increase stake footpath, increase stake week area, and by with pile peripheral earth screw occlusion, significantly lift Pile side soil and survey resistance, this practicality New engineering method bottom-spreading technology can form the stake bottom point of local wide, by increasing stake floor space in hard soil layer or rock stratum Increase stake end and carry power, so as to further increase stake total bearing capacity, the utility model structure and pile making method meet national energy-saving Emission reduction policy, by the way that screw thread is expanding, pile body passes through concrete thread and stake on the premise of pile load and concrete dosage is not increased All soil, which forms screw-type occlusion increase soil around pile collateral resistance and expands stake floor space increase end, carries three effective ways of power, significantly Ground improves pile bearing capacity, in making full use of, major diameter concrete strength of pile, has high sexual valence when economic benefit.

As shown in Figure 1：A kind of structure-improved of full-sleeve twist bit, hollow cylindrical casing 1 can be driven by being provided with Rotating lower power head 4, lower power head 4 are detachably connected with described sleeve pipe 1.Lower 4 top of power head is provided with power head 5, Upper power head 5 is connected with the auger stem 6 that can be moved in described sleeve pipe 1, and 6 bottom of auger stem is connected with can be described The down-hole hammer 7 or drill bit 8 moved in casing 1,3 hand of spiral of spiral component are opposite with 6 hand of spiral of auger stem

As shown in Fig. 2, full-sleeve thread-whirling drill configuration aids in for full-sleeve slewing drilling machine and churning driven or grab bucket etc. The drilling equipment that fetches earth combines.

As shown in figure 3, the spiral component 3 is helical blade

As shown in figure 4, spiral component 3 is single or multiple detent mechanisms, and when spiral component is trapezoidal, spiral component Root thickness D1 is more than spiral component top thickness D2.

As shown in figure 5, the spiral component 3 is the combination of helical blade and single or multiple detent mechanisms.3 be spiral shell in figure Vane sheet spiral component, 3-1 are toothed spiral component.

As shown in fig. 6, full-sleeve screw pile forming method is：By the full-sleeve slewing drilling machine with this patent device structure Stake position is moved to, sleeve rotating is pressed into soil by casing align piles position by the direction of sleeve outer wall spiral component.2nd, rotary digging is utilized The object such as soil, rock slag in casing is cleared out casing by the drilling equipment follow-up of fetching earth of the auxiliary such as drilling machine or grab bucket, until sleeve rotating Creep into stake bottom depth.3rd, after bottom hole is cleaned out, ancillary equipment is extracted out of casing, steel reinforcement cage is put into casing.4、 After placing steel reinforcement cage, the casting concrete into casing.5th, after concreting, reversely rotate and lift casing, outside casing The outer hole wall of wall spiral component rotational shear casing, forms screwed stake holes, and casing inner concrete is carried in filling casing rapidly The screw thread stake holes formed is risen, forms screw thread pile body., if needed can the placing concrete into casing again during sleeve lift Feed supplement, until casing is proposed ground, forms armored concrete screw cast-in-place pile.

As shown in fig. 7, full-sleeve screw pile forming method is：It will be moved with the double driving head drilling machine of this patent device structure To stake position, the casing that lower power head is connected and the drill bit align piles position of casing inside spin drilling rod lower part.2nd, power up and down is started Head, auger stem and casing counter-rotating, are fetched earth drilling using drill bit and auger stem, sleeve rotating follow-up, auger stem general Outside the drain sleeves such as soil, rock slag, until casing is depressed into bottom hole depth.3rd, will be spiral after being cleaned out in bottom hole and casing Drilling rod proposes casing, removes drilling machine after casing is separated with the connection of lower power head.4 are put into the steel reinforcement cage made in casing And placing concrete.5th, after concrete casting, drilling machine is moved back to, and lower power head is reconnected on casing.Will be latent Drift is put into casing, is pressed on steel reinforcement cage, prevents in sleeve lift steel reinforcement cage with being altered on casing.6th, lower power head and drilling machine are utilized Lifting means opposite direction rotates and upgrades casing, in sleeve rotating lifting process, sleeve outer wall spiral component rotating clutch, shear sleeve The outer hole wall of pipe, produces upward moment of torsion service hoisting casing and forms screwed stake holes, casing inner concrete is being filled rapidly The screw thread stake holes that sleeve lift is formed, forms screw thread pile body.7th, during sleeve lift, can be poured again into casing if needed Concrete feed supplement is filled, until casing is proposed ground, forms armored concrete screw cast-in-place pile.

As shown in figure 8, double power head twist bit, auger stem connection down-hole hammer, during immersed tube, adjunction casing and spiral shell The construction method of rotary drill bar：1 drilling machine moves to stake position, casing and auger stem lower part down-hole hammer align piles position 2 is started dynamic up and down Power head casing tube rotates in opposite directions drilling with auger stem, and down-hole hammer impact holing, sleeve rotating follow-up, 3 is complete by casing Upper power head is separated with auger stem after piercing ground, lower power head, which separates with casing and is lifted up power head 4 up and down, to exist An auger stem is again coupled on auger stem, then in a casing top accordingly piece casing of connection, and by the spiral shell after connection Rotary drill bar, casing are connected .5 with upper and lower power head and continue drilling until casing is sink to required depth respectively, treat in casing soil emptying Afterwards, power head in lifting, proposes outside casing and lower power head completely until being followed by auger stem.6 fix auger stem, and by after After connecing auger stem dismounting, power head is moved down, is connected with casing inside spin drilling rod.The 7 upper power heads of lifting, until by spiral shell Rotary drill bar and down-hole hammer propose that lower power head is separated and removes drilling machine by casing and lower power head 8 with casing completely, in casing Steel reinforcement cage is inside put into, and drilling machine is moved back to by the 9th steps of placing concrete, and lower power head is connected with casing, sinking auger Bar, down-hole hammer is pressed on steel reinforcement cage, prevents steel reinforcement cage from rotating and upgrading casing with altering .9 opposite directions on casing in sleeve lift, After casing to be followed by proposes ground completely, and pipe inner concrete stream completely is net, stopping carries pipe, by lower power head and is followed by casing Separation, after dismounting is followed by casing, moves down lower power head and is connected with casing, down-hole hammer is pressed on steel reinforcement cage, continues anti- Direction, which rotates, to be carried pipe 10 full-sleeve screw cast-in-place pile is formed after casing proposes ground completely.

As shown in figure 9, secondary base expanding and base expanding enters rock method in full-sleeve screw pile forming method：1st, this patent equipment knot will be carried The double driving head drilling machine of structure moves to stake position, and the casing that lower power head connects is aligned with the down-hole hammer of casing inside spin drilling rod lower part Stake position.2nd, the auxiliary device such as power head and air compressor machine up and down is started, using down-hole hammer percussion drilling, sleeve rotating follow-up, utilizes Soil etc. is easily discharged out of the hole gases at high pressure, auger stem auxiliary casting, until casing is depressed into bottom hole rock stratum.3rd, down-the-hole hammering blow The first pore-forming in rock stratum, slows down sleeve rotating follow-up speed, rotates broken down-hole hammer impact holing hole using casing external spiral component Wall, and the rock slag of generation is exported upwards by spiral component, second reaming is carried out, stake holes diameter is formed and is equal to telescoping screw The lower part enlarged of component outside diameter, until reaching stake bottom depth.4th, after bottom hole is cleaned out, auger stem and down-hole hammer are carried Go out casing, drilling machine is removed after casing is separated with the connection of lower power head, the steel reinforcement cage made and pouring are put into casing Concrete.6th, after concrete casting, drilling machine is moved back to, and lower power head is reconnected on casing.Down-hole hammer is put Enter casing, be pressed on steel reinforcement cage, prevent in sleeve lift steel reinforcement cage with being altered on casing.7th, set using lower power head and drilling machine lifting Standby opposite direction rotates and upgrades casing, in sleeve rotating lifting process, the outer hole wall of sleeve outer wall spiral component rotational shear casing, and shape Into screwed stake holes, casing inner concrete is in the screw thread stake holes that filling sleeve lift is formed rapidly, formation screw thread pile body.8、 During sleeve lift, if needed can the placing concrete feed supplement into casing again, until casing proposed ground, form steel Reinforced concrete screw cast-in-place pile.

As shown in Figure 10, reducing screw thread pile construction method in full-sleeve screw pile forming method：A full set of caliber reducing screw thread Stake：1st, the drilling machine that casing is provided outside spiral component and increases screw thread is moved into stake position, starts power-equipment, by sleeve rotating pressure Enter ground, and soil in hole, rock slag etc. is discharged, until casing is depressed into bottom hole depth.2nd, after bottom hole is cleaned out, in casing Inside it is put into the steel reinforcement cage made and placing concrete.3rd, after concrete casting, opposite direction rotates and upgrades casing, casing rotation Turn in lifting process, the outer hole wall of sleeve outer wall spiral component rotational shear casing, form screwed stake holes, coagulation in casing Soil is in the screw thread stake holes that filling sleeve lift is formed rapidly, formation screw thread pile body.4th, at sleeve lift to stake design reducing, change Direction of rotation continues to lift up casing to rotate forward, and soil body failure by shear is engaged in spiral component by sleeve outer wall spiral component Between, cylindrical stake holes is formed, the screw thread shearing stake holes hole wall of increasing, forms screw thread space, casing inner concrete is filled rapidly The screw thread stake holes space that sleeve lift produces, forms the opposite top screw thread pile cutoff of upper enlarged diameter hand of spiral.Casing carries During rising, if needed can the placing concrete feed supplement into casing again, until casing proposed ground, form reinforced concrete Native reducing screw cast-in-place pile.

As shown in figure 11, semi-screw pile construction method in full-sleeve screw pile construction method：1st, this patent equipment will be carried The drilling machine of structure moves to stake position, and sleeve rotating is pressed into ground and soil, rock slag etc. are easily discharged out of the hole until casing is depressed into hole Bottom depth；2nd, after bottom hole is cleaned out, the steel reinforcement cage made and placing concrete are put into casing；3rd, concrete casting is complete Opposite direction rotates and upgrades casing after finishing, in sleeve rotating lifting process, the outer hole wall of sleeve outer wall spiral component rotational shear casing, Screwed stake holes is formed, casing inner concrete is in the screw thread stake holes that filling sleeve lift is formed rapidly, formation screw thread pile body； 4th, at sleeve lift to stake design reducing, change direction of rotation and continue to lift up casing to rotate forward, sleeve outer wall spiral component Soil body failure by shear is engaged between spiral component, forms cylindrical stake holes, casing inner concrete fills rapidly sleeve lift The cylinder stake holes space of generation, forms semi-screw pile top straight bar section., if needed can be again to casing during sleeve lift Interior placing concrete feed supplement, until casing is proposed ground, forms half screw bored concrete pile of armored concrete.

A kind of sleeve structure of full-sleeve revolving spiral drilling machine and the construction method of screw cast-in-place pile provide a kind of big mouth The effective way of footpath screw cast-in-place pile and heavy caliber base expanding and base expanding screw cast-in-place pile pile.Casing with spiral component sink and In lifting process, spiral component produces moment of torsion upwardly or downwardly by the rotating clutch its vicinity soil body, can be more easily Make casing sink or lifting.During sleeve lift, spiral component rotational shear stake holes inner wall, forms Screw Pile Hole, while the concrete flowed out in casing, under gravity pressure, rapid casing of filling rises the screw thread space to be formed, and forms screw thread Irrigate pile body.Practice finds that Screw Pile pile body screw thread and the foot spiral component form for forming screw thread space are closest, institute Have certain thickness, height and its height, thickness can not less than the spiral component of Screw Pile thread design value with lower part Ensure that Screw Pile pile body thread meets specification, design requirement in various stratum.Foot sets height to be more than remaining spiral structure The single or multiple detent mechanism of part, can be in the case where not increasing drilling resistance, increase Screw Pile thread height, there is provided The pile side resistance of higher.The spiral component of lower part trapezium structure can form the stronger trapezoidal thread stake body spiral shell of punch resistant capability Tooth, top spiral component can equally have certain thickness, height and form, to further ensure that Screw Pile thread matter Amount, may be set to be relatively thin or higher helical blade to reduce drilling resistance and increase drilling and lifting moment of torsion.When Stake bottom can slow down sleeve rotating follow-up speed when needing reaming, utilize the latent of the internal drilling rod of casing external spiral component and connection The stake holes hole wall that drift or drill bit are formed carries out rotational shear, further expands stake holes, forms base diameter and is equal to casing spiral shell Revolve the cylindrical enlarged of component outside diameter.As lower part soil layer or rock stratum are more hard, casing external spiral component is difficult to rotate Casing external spiral component, can be arranged to the pyramidal structure to become larger step by step from the bottom to top by reaming, thus to stake holes carry out repeatedly by Level reaming, so that by expanding stake floor space, increases end resistance.

Embodiment provided above is the better embodiment of the utility model, is only used for convenient explanation the utility model, and The non-limitation made to the utility model in any form, any those of ordinary skill in the art, if not departing from In the range of the utility model carries technical characteristic, made using the utility model disclosed technology content and locally change or repair The equivalent embodiment of decorations, and without departing from the technical characteristics of the utility model content, still fall within the utility model technical characteristic In the range of.

Claims (8)

1. A kind of 1. structure-improved of full-sleeve twist bit, it is characterised in that：It is described double including double power head twist bit (2) Casing (1) is installed, being detachably provided with described sleeve pipe (1) can make its rotating lower dynamic on power head twist bit (2) Power head (4), lower power head (4) top are provided with power head (5)；

   The upper power head (5) is detachably connected with the auger stem (6) that can be moved up and down in described sleeve pipe (1), institute The lower end for stating auger stem (6) is connected with the device for drilling that can be moved in described sleeve pipe (1)；

   Integrally formed with spiral component (3) on described sleeve pipe (1) at least part outer wall, wherein, the spiral component (3) it is spiral Direction is opposite with the hand of spiral of the auger stem (6).
2. A kind of 2. structure-improved of full-sleeve twist bit according to claim 1, it is characterised in that:The device for drilling is One kind in down-hole hammer (8) and drill bit (9).
3. A kind of 3. structure-improved of full-sleeve twist bit according to claim 1, it is characterised in that：Described sleeve pipe (1) It is detachably connected and forms including at least two casings, one end of any described sleeve pipe (1) can be removable with the lower power head (4) Unload formula connection.
4. A kind of 4. structure-improved of full-sleeve twist bit according to claim 1, it is characterised in that：The auger stem (6) two drilling rods for carrying helical blade, and detachable connection between adjacent drilling rod are included at least.
5. A kind of 5. structure-improved of full-sleeve twist bit according to claim 1, it is characterised in that：Described at least part The thickness of spiral component (3) is not less than 3 centimetres.
6. A kind of 6. structure-improved of full-sleeve twist bit according to claim 1, it is characterised in that：Described at least part Spiral component (3) is not less than 3 centimetres perpendicular to the height of described sleeve pipe (1).
7. A kind of 7. structure-improved of full-sleeve twist bit according to claim 1, it is characterised in that：Described at least part Spiral component (3) section is trapezoidal, and its root thickness is more than top thickness.
8. An a kind of 8. structure improved full set based on claim 1 to claim 7 any one of them full-sleeve twist bit Pipe full circle swinging is made a connection, it is characterised in that：The spiral component (3) is provided with the full-sleeve full-rotation favourable turn (10) Described sleeve pipe (1).