CN101812976B - Adjustable multiple coil extruding and expanding drilling tool - Google Patents

Adjustable multiple coil extruding and expanding drilling tool Download PDF

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Publication number
CN101812976B
CN101812976B CN 201010172621 CN201010172621A CN101812976B CN 101812976 B CN101812976 B CN 101812976B CN 201010172621 CN201010172621 CN 201010172621 CN 201010172621 A CN201010172621 A CN 201010172621A CN 101812976 B CN101812976 B CN 101812976B
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CN
China
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extruding
expanding
rod
helical blade
adjustable
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CN 201010172621
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Chinese (zh)
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CN101812976A (en
Inventor
刘钟
李志毅
杨松
赵琰飞
张义
马利军
卢璟春
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中冶建筑研究总院有限公司
中国京冶工程技术有限公司
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Priority to CN 201010172621 priority Critical patent/CN101812976B/en
Publication of CN101812976A publication Critical patent/CN101812976A/en
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Publication of CN101812976B publication Critical patent/CN101812976B/en

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Abstract

The invention relates to an adjustable multiple coil extruding and expanding drilling tool, comprising a hollow connecting rod, the lower part of the lateral wall of the connecting rod is provided with a helical blade, the bottom end of the connecting rod is provided with a drill, the connecting rod is coaxially connected with a plurality of helical extruding expanding bodies, the helical extruding expanding body is arranged between the helical blades, the margin of the cross section of each helical extruding expanding body is helical line, maximum outer diameter and minimum outer diameter of each helical extruding expanding body are respectively constant or increased from bottom to top, and the maximum outer diameter of each helical extruding expanding body is equal to or less than the outer diameter of the helical blade. The invention aims at providing an adjustable multiple coil extruding and expanding drilling tool which can penetrate thick hard clay or dense sand soil layer, avoid collapse when drilling into finished hole in high ground eater level and high hydrodynamic pressure stratum and can implement complete extruding soil or partial extruding soil type cast-in-place pile through multiple stage extruding and expanding at different depths by freely adjusting the position of multi-stage extruding expanding body according to longitudinal distribution of stratum.

Description

Adjustable multiple coil extruding and expanding drilling tool
Technical field
The present invention relates to a kind of adjustable multiple coil extruding and expanding drilling tool that is applied to field of civil engineering.
Background technology
In civil engineering pile foundation field, modern pile foundation is according to the impact of piling method on the stratum, can be divided into non-Squeezing Soil Pile, part Squeezing Soil Pile and Squeezing Soil Pile three major types fully.At present both at home and abroad llong helix bored piles CFA stake commonly used belongs to non-Squeezing Soil Pile, and the characteristics such as easy construction, speed are fast, friction, low noise that it has are widely applied in fields such as pile foundation engineering, ground processing, pattern foundation pit supporting structures.But the problems such as bearing capacity is lower and unearthed, contaminated environment that the CFA stake exists.Geotechnical engineering circle is devoted to the complete soil compaction type castinplace pile of development of new always in recent years, and representative have short spiral extrusion soil filling pile (ZL200710063983.3), full thread stake (ZL96119602.5), a semi-screw pile (ZL03128265.2) etc.Compare with non-Squeezing Soil Pile, fully soil compaction type spiral extrusion soil filling pile except having obvious technology and cost advantage, also has without mud with without the advantage of the environmental protection such as dregs discharging, friction, low noise aspect.But above-mentioned semi-screw pile, full thread stake and short spiral extrusion soil filling pile remain in some problems and limitation in the practical engineering application process.Such as, semi-screw pile or full thread stake have 2/3 or the long screw thread of full stake for realizing pile body, must adopt complicated simultaneous techniques and technique in the pile construction process; Because great majority constructions stratum has the uncertainty of distribution and the heterogeneity of soil nature, be difficult to guarantee the instantaneous synchronous of a screw thread generative process, thereby cause that partly or entirely a stake screw thread can not be according to the designing requirement moulding.And short spiral extrusion soil filling pile finally forms columniform complete Squeezing Soil Pile by applying equidirectional moment of torsion, does not need simultaneous techniques; But the bidirectional helix closed extruding-enlarging aiguille that existing short spiral extrusion soil filling pile pile adopts, because the soil compaction amount is large, thicker gumbo layer or dense sand soil layer can not be effectively passed through in existence, affect the pile degree of depth.In addition, due to the jointed rod diameter on short helix extruding-enlarging drill bit and half screw drilling tool top less than the stake bore dia, easily cause collapse hole in or weak clay that flowing pressure is larger higher in groundwater table and sandy soil stratum, can cause that a side skin friction reduces, and has limited the scope of application of short spiral extrusion soil filling pile and semi-screw pile thus.
Summary of the invention
Collapse hole appears when the object of the present invention is to provide and a kind ofly can effectively penetrate thicker gumbo layer or thicker dense sand soil layer, avoiding in phreatic high, large flowing pressure stratum drilling and forming hole, and can vertically distribute according to the stratum, by freely adjusting the position of multistage extruding expanding body, at the adjustable multiple coil extruding and expanding drilling tool of different depth through the complete soil compaction type of multistage squeezed enforcement or part soil compaction type castinplace pile.
Adjustable multiple coil extruding and expanding drilling tool of the present invention, the connecting rod that comprises hollow, the middle and lower part of the lateral wall of connecting rod is provided with helical blade, the bottom of connecting rod is provided with drill bit, coaxially on described connecting rod be in series with a plurality of helix extruding-enlarging bodies, the helix extruding-enlarging body is positioned between described helical blade, the edge of the cross section of each helix extruding-enlarging body is helix, the maximum outside diameter of each helix extruding-enlarging body and minimum outer diameter are respectively constant or increase gradually from bottom to top, and the maximum outside diameter of each helix extruding-enlarging body is equal to or less than the external diameter of described helical blade.
Adjustable multiple coil extruding and expanding drilling tool of the present invention, wherein said connecting rod adopts the round steel pipe of more piece hollow to compose in series, the equal diameters of more piece round steel pipe, each helix extruding-enlarging body is arranged on respectively on the round steel pipe of a joint with helical blade, adopts six side's snap joints to be connected between each pitch circle steel pipe.
Adjustable multiple coil extruding and expanding drilling tool of the present invention, the top of wherein said connecting rod is provided with reverse extruding expanding body coaxially, oppositely extruding expanding body is the truncated cone-shaped that top end diameter is little, the bottom diameter is large, oppositely the bottom of extruding expanding body is connected with the top of the helix extruding-enlarging body that is positioned at topmost, the top of the lateral wall of described connecting rod and reverse extruding expanding body is provided with the rotation direction reverse acting spiral squeezed blade opposite with the rotation direction of described helical blade, helical blade is the uniform pitch helical blade, and the edge of helical blade is welded with a plurality of alloy cutting tooths.
Adjustable multiple coil extruding and expanding drilling tool of the present invention, the top of wherein said connecting rod arranges elongated helical blade, or adopts the mode without helical blade, and the helix of the cross-sectional edge of described helix extruding-enlarging body is spiral of Archimedes or log spiral.
adjustable multiple coil extruding and expanding drilling tool of the present invention, the middle part of wherein said drill end is weldingly connected with the bottom of guiding slip casting cover, guiding slip casting cover can be inserted in the hole of described connecting rod bottom slidably, the sidewall of guiding slip casting cover is provided with several piling perfusion outlets, the outside that is positioned at described connecting rod on the edge of described drill end vertically is fixed with several guide pegs, the top of each guide peg is respectively arranged with limited bolt, on described helical blade, the position corresponding with guide peg is provided with guide peg and passes through the hole, the guide peg that each guide peg can pass respectively on helical blade slidably passes through the hole.
Adjustable multiple coil extruding and expanding drilling tool of the present invention, the middle part that wherein said drill end is positioned at described guiding slip casting cover is provided with the frustum of a cone or semicircle billiard table, drill bit is with the fishtail type apex point, and the quantity of described helix extruding-enlarging body is 2-8, and the quantity of described guide peg is 2-4.
Adjustable multiple coil extruding and expanding drilling tool of the present invention, the edge of wherein said helical blade is welded with a plurality of alloy cutting tooths.
Compared with prior art, adjustable multiple coil extruding and expanding drilling tool of the present invention has following advantage:
1. adjustable multiple coil extruding and expanding drilling tool of the present invention, can utilize helical blade the gumbo in incompressible soil layer and closely knit sand is broken, cut and be transported to carry out in compressible soil layer squeezed, broken through thus the limitation that can't pass through thick gumbo layer or thick dense sand stratum of original short helix extruding-enlarging drill bit because only having the soil compaction effect to cause, therefore it is compared with existing bidirectional helix closed extruding-enlarging aiguille, under same dynamic condition, same bore diameter and same drilling depth condition, have stronger the pore-forming ability that penetrates and wider ground adaptability.
2. adjustable multiple coil extruding and expanding drilling tool of the present invention, owing to being in series with coaxially a plurality of helix extruding-enlarging bodies in any position on connecting rod, therefore it has the squeezed function of multistage substep, by apex point piercing the incompressible soil layer soil body of lower floor, broken, cutting, and helical blade is upwards carried the function of the cut soil body, lower floor's gumbo or closely knit sand are transported to top compressible soil section layer by layer, and will carry the soil body that comes up compacted in the stake week of compressible soil layer by the set extruding expanding body of this interval, thereby stake week and inter-pile soil body intensity have effectively been improved, and stake side soil frictional resistance and a pile bearing capacity have been increased substantially.
3. adjustable multiple coil extruding and expanding drilling tool of the present invention, because elongated helical blade is adopted in the middle and lower part of connecting rod, and the helical blade external diameter equals expanded diameter, so will be with the middle and lower part connecting rod section of the helical blade method higher than groundwater table by adopting, solved in weak clay or sand stratum, because groundwater table is high, the collapse hole problem that short helix extruding-enlarging drill bit or half screw drilling tool may occur in the drilling and forming hole process.
4. adjustable multiple coil extruding and expanding drilling tool of the present invention, its apex point that can glide has improved the drillability of drilling tool, also be conducive to the pilings such as chutable concrete and press smoothly filling by the apex point of hollow connecting rod and down-sliding type, avoid the plugging phenomenon, in addition, can realize that also apex point repeatedly uses, and has reduced construction cost.
5. under same stratum, same stake footpath and same stake elongate member, with drilled pile, Percussion Piles, revolve and dig stake or the engineering pile type commonly used such as CFA stake is compared, the cylindrical squeezed castinplace pile that adjustable multiple coil extruding and expanding drilling tool of the present invention is completed, have that bearing capacity is higher, settling amount is less, cost is lower, energy consumption still less, the remarkable advantage such as environmental protection is better.
6. adjustable multiple coil extruding and expanding drilling tool of the present invention, also be applicable to the foundation treatment engineering field, the composite foundation that it implements to complete, than present the most frequently used CFG composite foundation, has higher bearing capacity, the vertical cylindrical reinforcing body that its reason is to adopt the adjustable multiple coil extruding and expanding drilling tool construction to complete has higher bearing capacity of single pile, and the intercolumniation soil strength of reinforcing between cylinder improves greatly due to compacted effect.Therefore, adjustable multiple coil extruding and expanding drilling tool of the present invention is specially adapted to the composite foundation engineering project of high-speed railway, speedway, high-rise building.
7. the applicable stratum of adjustable multiple coil extruding and expanding drilling tool of the present invention is extensive, comprise backfill, sand, silt, silty clay, clay, loess, gravel soil, contain sand pebble soil and severely-weathered soil layer etc., also be applicable to groundwater table higher or have a stratum of flowing pressure.
8. adjustable multiple coil extruding and expanding drilling tool of the present invention pile foundation, composite pile foundation and the composite foundation implementing to complete can be widely used in all kinds of engineerings of civil engineering different field, comprising: high-rise and Super High residential houses engineering, public works, industrial premises engineering, traffic engineering, power engineering and Environmental Engineering etc.
Below in conjunction with drawings and Examples in detail the present invention is described in detail.
Description of drawings
Fig. 1 is the front view of structural representation of a kind of embodiment of adjustable multiple coil extruding and expanding drilling tool of the present invention;
Fig. 2 is the sectional view in the A-A cross section of Fig. 1;
Fig. 3 is the sectional view in the B-B cross section of Fig. 1;
Fig. 4 is the front view of structural representation of the another kind of embodiment of adjustable multiple coil extruding and expanding drilling tool of the present invention;
Fig. 5 is the sectional view in the C-C cross section of Fig. 4;
Fig. 6 is the sectional view in the D-D cross section of Fig. 4;
Fig. 7 is the front view of structural representation of another embodiment of adjustable multiple coil extruding and expanding drilling tool of the present invention;
Fig. 8 is the front view of structural representation of another embodiment of adjustable multiple coil extruding and expanding drilling tool of the present invention;
Fig. 9 is the main pseudosection that apex point is in does not have the slip casting state;
Figure 10 is that apex point is in to glide and opens the main pseudosection that carries out the slip casting state.
The specific embodiment
As shown in Figure 1 and Figure 4, adjustable multiple coil extruding and expanding drilling tool of the present invention, the connecting rod 1 that comprises hollow, the middle and lower part of the lateral wall of connecting rod 1 is provided with helical blade 2, helical blade 2 can be the uniform pitch helical blade, can be also the decreasing worm-pitch helical blade, and the edge of helical blade 2 is welded with a plurality of alloy cutting tooths 7, be used for improving creeping into and abrasion resistance of drilling tool, the bottom of connecting rod 1 is provided with drill bit 4.
Any position is in series with a plurality of helix extruding-enlarging bodies 3 coaxially on connecting rod 1,2 have only schematically been drawn in figure, its needed concrete quantity is determined according to the geological condition of job site, usually between 2-4, helix extruding-enlarging body 3 is between helical blade 2, and as shown in Figures 2 and 3, the edge of the cross section of each helix extruding-enlarging body 3 is helix, the helix of the cross-sectional edge of helix extruding-enlarging body 3 is spiral of Archimedes, or log spiral.The maximum outside diameter of each helix extruding-enlarging body 3 and minimum outer diameter can be as Fig. 4, Fig. 5 and the constant that is respectively shown in Figure 6, or as Fig. 1, Fig. 2 and shown in Figure 3 increasing gradually from bottom to top, the maximum outside diameter of each helix extruding-enlarging body 3 can be the external diameter that equals helical blade 2, or less than the external diameter of helical blade 2.
Above-mentioned connecting rod 1 adopts the round steel pipe of more piece hollow to compose in series, the equal diameters of more piece round steel pipe, and each helix extruding-enlarging body 3 is arranged on respectively on the round steel pipe of a joint with helical blade, adopts six side's snap joints to be connected between each pitch circle steel pipe.
The difference of Fig. 7 and embodiment shown in Figure 8 and Fig. 1 and embodiment shown in Figure 4 is, its top at connecting rod 1 is provided with reverse extruding expanding body 13 coaxially, oppositely extruding expanding body 13 is the truncated cone-shaped that top end diameter is little, the bottom diameter is large, oppositely the bottom of extruding expanding body 13 is connected with the top of the helix extruding-enlarging body 3 that is positioned at topmost, and the lateral wall of the top of connecting rod 1 and reverse extruding expanding body 13 is provided with the squeezed blade 5 of the rotation direction reverse acting spiral opposite with the rotation direction of described helical blade 2.
as shown in Figure 9 and Figure 10, the middle part on drill bit 4 tops is weldingly connected with the bottom of guiding slip casting cover 8, guiding slip casting cover 8 can be inserted in the hole of connecting rod 1 bottom slidably, if the sidewall of guiding slip casting cover 8 is provided with 2 piling perfusion outlets, piling perfusion outlet is used for injecting the fluidised form piling to boring, the outside that is positioned at connecting rod 1 on the edge on drill bit 4 tops vertically is fixed with 2 guide pegs 9, the quantity of guide peg 9 also can be 3 or 4, the top of each guide peg 9 is respectively arranged with limited bolt, on helical blade 2, the position corresponding with guide peg 9 is provided with guide peg and passes through the hole, the guide peg that each guide peg 9 can pass respectively on helical blade 2 slidably passes through the hole.The middle part that drill bit 4 tops are positioned at guiding slip casting cover 8 is provided with the frustum of a cone or semicircle billiard table 12, and drill bit 4 is with the fishtail type apex point.In work progress, when needs inject piling in the boring, can utilize tremie to the interior injection piling of the connecting rod 1 of hollow, utilize the pressure of perfusion piling to move downward together with guiding slip casting cover 8 and guide peg 9 by drill bit 4, piling perfusion outlet on guiding slip casting cover 8 is communicated with boring, and piling pours into outlet by piling and is pressed in boring.The effect of the frustum of a cone or semicircle billiard table 12 is to allow the fluidised form piling not deposit in guiding slip casting cover 8.
The job practices of adjustable multiple coil extruding and expanding drilling tool of the present invention comprises following construction sequence:
1) according to engineering ground formation characteristics, groundwater level depth, at first determine to adopt the stake of complete soil compaction type or the stake of part soil compaction type, and then the external diameter of the helical blade 2 of the diameter of definite helix extruding-enlarging body 3 and pattern, spiral drill and the external diameter of hollow connecting rod 1, again according to the vertical compressive features of different depth soil layer, at the select location place of connecting rod 1, each helix extruding-enlarging body 3 is installed; In addition, determine according to groundwater level depth whether the top of connecting rod 1 adopts reverse extruding expanding body 13 and the squeezed blade 5 of reverse acting spiral, or helical blade 2 is extended to the top of connecting rod 1, or do not establish helical blade on the top of connecting rod 1.
2) pile work drilling machine is in place according to known method, be ready to concrete pump, and the piling that will pour into.Piling is a kind of in the pilings such as concrete piling, CFG material, tailings mortar piling or cement steel slag piling.
3) after pile work drilling machine is in place, start pile work drilling machine and apply clockwise moment of torsion and downward axial compression, utilize the downward rotary drill squeezed hole of adjustable multiple coil extruding and expanding drilling tool, in boring procedure, by the soil body in rotary drill incompressible hardpan out, do screw from bottom to top and be transported to compressible soil section layer by layer by helical blade 2, subsequently this part soil body be arranged at compressible soil layer by layer one or more levels helix extruding-enlarging body 3 of section all clamp-on in the hole week side soil body, form complete soil compaction type stake hole, perhaps the part soil body is squeezed in all side soil bodys in a hole, another part soil body is continued transported to the earth's surface by helical blade 2, forming section soil compaction type stake hole, the squeezed hole process of adjustable multiple coil extruding and expanding drilling tool is until till reaching the design hole depth, this one-phase is called the first step stake hole squeezed stage of machinery.
4) after squeezed the completing of first step stake hole machinery, start the power that axially lifts that pile work drilling machine applies clockwise moment of torsion and makes progress, make adjustable multiple coil extruding and expanding drilling tool rotate up motion, in rotating up squeezed lifting process, the soil body that collapses in stake hole, top can being clamp-oned again in all side soil bodys in a hole with the squeezed blade 5 of reverse acting spiral and reverse extruding expanding body 13 of connecting rod 1 top, thereby form the cylindrical stake of complete soil compaction type, this one-phase is called the second step stake hole squeezed stage of machinery, this work progress last till drilling tool be rotated rise on the earth's surface till.
5) revolve squeezed lifting on adjustable multiple coil extruding and expanding drilling tool begins in, start concrete pump, carry out continuously the filling of piling pressure in a squeezed hole to completing, this one-phase was called for the 3rd stake hole squeezed stage of pressure in step, the 3rd step stake hole pressure is squeezed is to carry out under the pressure-acting of concrete pump, continuous pressure by piling is squeezed, can make the pile cutoff of having completed the filling of fluidised form piling pressure can guarantee that expanded diameter meets designing requirement, this hole pressure squeezing process will last till that piling is pressed and fill with till the design of pile top absolute altitude, so far columniform complete soil compaction type castinplace pile or part soil compaction type castinplace pile have been formed.
6) according to designing requirement, can insert reinforcing cage, tendon or shaped steel in just completing the helix extruding-enlarging castinplace pile pile body of perfusion according to known method.
Embodiment recited above is described the preferred embodiment of the present invention; be not that the scope of the invention is limited; design under spiritual prerequisite not breaking away from the present invention; various distortion and improvement that the common engineers and technicians in this area make technical scheme of the present invention all should fall in the definite protection domain of claims of the present invention.

Claims (4)

1. adjustable multiple coil extruding and expanding drilling tool, the connecting rod (1) that comprises hollow, the middle and lower part of the lateral wall of connecting rod (1) is provided with helical blade (2), the bottom of connecting rod (1) is provided with drill bit (4), the upper coaxial a plurality of helix extruding-enlarging bodies (3) that are in series with of described connecting rod (1), helix extruding-enlarging body (3) is positioned between described helical blade (2), the edge of the cross section of each helix extruding-enlarging body (3) is helix, the maximum outside diameter of each helix extruding-enlarging body (3) and minimum outer diameter are respectively constant or increase gradually from bottom to top, the maximum outside diameter of each helix extruding-enlarging body (3) is equal to or less than the external diameter of described helical blade (2), it is characterized in that, the top of described connecting rod (1) is provided with reverse extruding expanding body (13), oppositely extruding expanding body (13) is that top end diameter is little, the truncated cone-shaped that the bottom diameter is large, oppositely the bottom of extruding expanding body (13) is connected with the top of the helix extruding-enlarging body (3) that is positioned at topmost, the top of the lateral wall of described connecting rod (1) and reverse extruding expanding body (13) is provided with the rotation direction reverse acting spiral squeezed blade (5) opposite with the rotation direction of described helical blade (2).
2. adjustable multiple coil extruding and expanding drilling tool as claimed in claim 1, it is characterized in that: described helical blade (2) is the uniform pitch helical blade, and the edge of helical blade (2) is welded with a plurality of alloy cutting tooths (7).
3. adjustable multiple coil extruding and expanding drilling tool as claimed in claim 2, it is characterized in that: the middle part on described drill bit (4) top is weldingly connected with the bottom of guiding slip casting cover (8), guiding slip casting cover (8) can be inserted in the hole of described connecting rod (1) bottom slidably, the sidewall of guiding slip casting cover (8) is provided with several piling perfusion outlets, the outside that is positioned at described connecting rod (1) on the edge on described drill bit (4) top vertically is fixed with several guide pegs (9), the top of each guide peg (9) is respectively arranged with limited bolt, the upper position corresponding with guide peg (9) of described helical blade (2) is provided with guide peg and passes through the hole, the guide peg that each guide peg (9) can pass respectively on helical blade (2) slidably passes through the hole.
4. adjustable multiple coil extruding and expanding drilling tool as claimed in claim 3, it is characterized in that: the middle part that described drill bit (4) top is positioned at described guiding slip casting cover (8) is provided with the frustum of a cone or semicircle billiard table (12), drill bit (4) is with the fishtail type apex point, the quantity of described helix extruding-enlarging body (3) is 2-8, and the quantity of described guide peg (9) is 2-4.
CN 201010172621 2010-05-14 2010-05-14 Adjustable multiple coil extruding and expanding drilling tool CN101812976B (en)

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CN102182410A (en) * 2011-04-22 2011-09-14 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 Cyclone sand washing device
CN102392611A (en) * 2011-10-14 2012-03-28 武汉武船机电设备有限责任公司 Threaded drill pipe without bringing out soil and pilling method without bringing out soil for simultaneously forming thread and smooth rod
CN103510850B (en) * 2013-10-16 2017-04-05 武汉武船机电设备有限责任公司 A kind of piling drilling rig
CN103742079B (en) * 2013-12-31 2016-03-09 徐州徐工基础工程机械有限公司 A kind of length adjustable spiral bit structure
CN103806840B (en) * 2014-01-27 2016-05-11 中冶建筑研究总院有限公司 One-way spiral half soil compaction drill bit and one-way spiral half Squeezing Soil Pile construction technology
CN106351592A (en) * 2016-10-12 2017-01-25 王继忠 Variable-diameter spiral drill rod and concrete pile construction method
CN106499343B (en) * 2016-12-14 2018-07-24 刘守进 Spiral cylinder soil compaction drill bit and its bore forming method
CN107652306B (en) * 2017-10-24 2021-02-09 北京红太阳药业有限公司 Cefuroxime sodium crystal compound
CN109763778B (en) * 2019-03-27 2020-04-21 邹城兖矿泰德工贸有限公司 Coal-exploring drill rod

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