CN201024899Y - Two-directional spiral sealing extrusion and expansion aiguille - Google Patents

Two-directional spiral sealing extrusion and expansion aiguille Download PDF

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Publication number
CN201024899Y
CN201024899Y CNU200720103635XU CN200720103635U CN201024899Y CN 201024899 Y CN201024899 Y CN 201024899Y CN U200720103635X U CNU200720103635X U CN U200720103635XU CN 200720103635 U CN200720103635 U CN 200720103635U CN 201024899 Y CN201024899 Y CN 201024899Y
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CN
China
Prior art keywords
extruding
helix
enlarging
expanding
pitch
Prior art date
Application number
CNU200720103635XU
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Chinese (zh)
Inventor
刘钟
刘波
李志毅
赵琰飞
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中国京冶工程技术有限公司
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Priority to CNU200720103635XU priority Critical patent/CN201024899Y/en
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Publication of CN201024899Y publication Critical patent/CN201024899Y/en

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Abstract

The utility model relates to a bidirectional helix closed squeezing and expanding drill bit, comprising a hollow connecting rod. The top end of the connecting rod is provided with a connecting flange, and the bottom of the connecting rod is provided with a drill tip. The lower part of the connecting rod is in serial sleeved with or is integrally provided with a lower helix squeezing and expanding element, a closed squeezing and expanding element and a movable sealed squeezing and expanding element coaxially from the top to the bottom. The movable sealed squeezing and expanding element takes a round table shape, and the cross section of the movable sealed squeezing and expanding element is gradually reduced from the bottom to the top. The external wall of the movable sealed squeezing and expanding element is provided with a laevorotatory movable sealed helix squeezing and expanding blade. The sealed squeezing and expanding element takes a column shape. The lower helix squeezing and expanding element takes a round table shape, and the cross section of the lower helix squeezing and expanding element is gradually increased from the bottom to the top. The external wall of the lower helix squeezing and expanding element is provided with a dextrogyrous lower helix squeezing and expanding blade. The proposal of the utility model is to provide a bidirectional helix closed squeezing and expanding drill bit which can be used in various geology conditions. The bidirectional helix closed squeezing and expanding pile which is produced by the utility model has the advantages of higher bearing capacity, littler subsidence quantity, better quality, lower cost, less energy consumption, higher working efficiency and more environment protection.

Description

Bidirectional helix closed extruding-enlarging aiguille
Technical field
The utility model relates to a kind of bidirectional helix closed extruding-enlarging aiguille that is applied to field of civil engineering.
Background technology
In field of civil engineering, modern pile foundation can be divided into non-soil compaction stake, the stake of part soil compaction and soil compaction stake three major types fully according to piling method to the influence of soil layer.Because non-soil compaction stake exists the problem of many technology, cost and environmental protection aspect, geotechnical engineering circle is devoted to the soil compaction stake of development of new always, particularly spiral soil compaction stake, because the job practices of this spiral soil compaction stake is compared with non-soil compaction stake, except that having tangible technology and cost advantage, also has the advantage of environmental protection aspects such as no mud, no dregs, friction, low noise.Development so far mainly is to be based upon long screw auger drilling deposited pile worker method (being CFA worker's method), Japanese steel fibre full thread concrete precast pile worker method, and German Pfleiderer Verkehrstechnik GmbH﹠amp; Co. on half-thread hollow prestressed concrete preformed pile (being Europile) worker's method basis of company.Wherein representational research and development have following several:
1. the patent No. is the screw pile forming technology by pouring of ZL96119602.5;
2. the patent No. is the threaded drillpipe of ZL01250189.1;
3. the patent No. is the helical burr ram stake machine of ZL01240059.9;
4. the patent No. is the helical burr ram stake machine link gear of ZL02138738.9;
5. the patent No. is the helical burr ram stake machine hoist and traction machine structure of ZL200410013038.9;
6. the patent No. is semi-screw pile and processing method and the device of ZL200310117711.9;
7. the patent No. is the semi-screw pile of ZL03128265.2 and becomes pile work method.
More than seven patents set forth drilling rod, the pile machine equipment of full thread stake and semi-screw pile respectively and become pile work method.It is long that the principal character of above-mentioned perfusion full thread stake is that the screw thread of stake has occupied whole stake, and the central tube of its pile threaded drillpipe is the equal diameter pipe, external diameters such as drill rod thread, the uniform pitch in the central tube outside.Above-mentioned semi-screw pile then is made up of two parts, and top is that linear structure, bottom are the screw-type structure, and two parts outside dimension is identical up and down.Wherein linear pattern partly account for total stake long 1/3, screw-type partly account for total stake long 2/3.The central tube of the pile drilling rod of semi-screw pile is the equal diameter pipe, external diameters such as drill rod thread, the uniform pitch in its underpart central tube outside.Semi-screw pile is divided into cast-in-place type and precasting two big classes.
Exist following defectives and problem in full thread stake, semi-screw pile and the piling method thereof in the above-mentioned patent, be illustrated respectively according to preformed pile and present walling pile two big classes now.
1, the defective and the problem of prefabricated full thread stake and prefabricated semi-screw pile
---the manufacturing equipment complexity of pre-threaded stake, costliness;
---manufacturing, the maintenance of pre-threaded stake and be connected complex process, the cost of production height;
---pre-threaded stake pile body is longer, transportation difficulty, cost of transportation height;
---the pre-threaded stake sets power requirement height;
---prefabricated semi-screw pile adopts the dither pile-sinking method, can only be applicable to soft soil layer and minor diameter stub.
2, the defective and the problem of cast-in-place full thread stake and semi-screw pile
---the stake of perfusion full thread need be with the boring machine preexisting hole;
---for the real pile body of realizing has 2/3 or the long screw thread of full stake, in the work progress of stake, must adopt complicated simultaneous techniques and technology;
---because uncertainty and the heterogeneity that the stratum has soil nature and soft or hard to change, be difficult to guarantee in the stake screw thread generative process instantaneous synchronously, therefore may cause part stake screw thread to be difficult to according to the designing requirement moulding;
---because these two kinds of piling methods all adopt the long screw auger of equal diameter central tube and longer spiral section, thereby in formation of pile, can consume more rig power, the drilling depth of influence under same formation, identical stake footpath condition, and can't be applied to the firm hard formation situation;
---the effective diameter that how to define full thread stake or semi-screw pile in designing and calculating does not still have final conclusion, if use the effective diameter of spiral external diameter as stake, may produce the problem of degree of safety aspect; If the problem that then can cause pile capacity to underestimate as the effective diameter of stake with the central tube external diameter.
The utility model content
The purpose of this utility model be to provide a kind of can be under various geological conditionss the bidirectional helix closed extruding-enlarging aiguille of construction operation, utilize that its made bidirectional helix closed extruding expands that the bearing capacity of stake is higher, settling amount is littler, better quality, cost are lower, energy consumption still less, higher, the environmental protection more of work efficiency.
Bidirectional helix closed extruding-enlarging aiguille of the present utility model, the connecting rod that comprises hollow, top at connecting rod is provided with mounting flange, its bottom is provided with apex point, the bottom of described connecting rod is set with or is shaped on down integratedly the helix extruding-enlarging body from bottom to up successively coaxially, sealed extruding expanding body and movable sealing extruding expanding body, described movable sealing extruding expanding body is the diminishing from bottom to top Rotary-table of cross section, the lateral wall of movable sealing extruding expanding body is provided with left-handed movable sealing helix extruding-enlarging blade, described sealed extruding expanding body is a cylinder, described helix extruding-enlarging body down is the Rotary-table that cross section increases from bottom to top gradually, and the lateral wall of following helix extruding-enlarging body is provided with the following helix extruding-enlarging blade of dextrorotation.
Bidirectional helix closed extruding-enlarging aiguille of the present utility model, wherein said movable sealing helix extruding-enlarging blade and the described external diameter of helix extruding-enlarging blade down are not more than the external diameter of described sealed extruding expanding body, and the described number of turns of helix extruding-enlarging blade down is more than 2 circles.
Bidirectional helix closed extruding-enlarging aiguille of the present utility model, the wherein said pitch of helix extruding-enlarging blade down is uniform pitch or varying pitch, its uniform pitch S jMathematic(al) representation be:
S j=α 1·D max (j=1,2,...,m)
In the formula,
S j-the size of j pitch (mm) from bottom to up;
J-is the ordinal number of j pitch from bottom to up;
α 1The design factor of-uniform pitch, its span commonly used is 0.5~1.2;
The total pitch number of m-;
D MaxThe external diameter of-sealed extruding expanding body (mm);
Its varying pitch S jMathematic(al) representation be:
S j=α 2·D max (j=1)
S j=β j·S j-1 (j=2,3,...,m)
In the formula,
β j = 1 + j - 1 K · m (j=2,3,...,m)
S j-the size of j pitch (mm) from bottom to up;
J-is the ordinal number of j pitch from bottom to up;
α 2-pitch S 1Design factor, its span commonly used is 0.5~1.2;
β j-pitch the enhancement coefficient of j pitch from bottom to up;
K-and α 2The adjustment coefficient that value is relevant, its span commonly used is 1.5~3.0;
The total pitch number of m-;
D MaxThe external diameter of-sealed extruding expanding body (mm).
Spiral shell squares such as the spiral shell square employing of described movable sealing helix extruding-enlarging blade wait spiral shell square S jMathematic(al) representation be:
S j=α 3·D max (j=1,2,...,n)
In the formula,
S j-the size of j pitch (mm) from top to bottom;
J-is the ordinal number of j pitch from top to bottom;
α 3The design factor of-uniform pitch, its span commonly used is 0.4~1.0;
The total pitch number of n-;
D MaxThe external diameter of-sealed extruding expanding body (mm).
Bidirectional helix closed extruding-enlarging aiguille of the present utility model, the wherein said number of turns of helix extruding-enlarging blade down is 2 to 6 circles, in the original position isoplanar of following helix extruding-enlarging blade, turn over 180 ° and locate to be provided with the secondary helical blade of half-turn, the direction of rotation of secondary helical blade is identical with following helix extruding-enlarging blade with the spiral shell square, described movable sealing helix extruding-enlarging blade and the described cross section of helix extruding-enlarging blade down are the variable cross-section quadrangle, its root thickness is greater than top thickness, in 100mm, the spiral number of turns of described movable sealing helix extruding-enlarging blade is 1 to 4 circle to the external diameter of described movable sealing helix extruding-enlarging blade than the little scope of the external diameter of described sealed extruding expanding body.
Bidirectional helix closed extruding-enlarging aiguille of the present utility model wherein is separately installed with a plurality of alloys brill teeth in the bottom of described helix extruding-enlarging blade down and the bottom of described secondary helical blade.
Bidirectional helix closed extruding-enlarging aiguille of the present utility model, wherein said apex point is the separate type apex point, the separate type apex point comprises circular terminal pad, soffit at terminal pad is provided with cutter head, the middle part of terminal pad upper surface has columniform boss, be provided with a plurality of locating grooves at the edge of terminal pad, each locating groove matches with locating piece respectively, each locating piece is fixedly linked with the described bottom of the external sidewall of helix extruding-enlarging down respectively, described boss is inserted in the hole of described connecting rod bottom, and the sealing seal with elastometic washer is adopted in the gap between boss and the described connecting rod centre bore.
The utility model bidirectional helix closed extruding-enlarging aiguille, wherein said cutter head comprises the large and small brill plate of two isosceles triangles that vary in size, the base of large and small brill plate is fixedly linked with described terminal pad respectively up, the plate face of described large and small brill plate is decussation and connects, and is fixed with sharp bar in wammel plate bottom.
The utility model bidirectional helix closed extruding-enlarging aiguille, wherein said apex point are the interconnection system apex point, are provided with at a side of described interconnection system apex point or bilateral and press the one-way cock of irritating piling.
Bidirectional helix closed extruding-enlarging aiguille of the present utility model compared with prior art, the utlity model has following several advantages:
1. carry out in the three step pile hole extruding-extending pore forming process at bidirectional helix closed extruding-enlarging aiguille, utilize bidirectional helix closed extruding-enlarging aiguille two-way that the soil body in the former stake hole is squeezed in the sidewall in stake hole when advancing to bore and carrying brill, make stake week soil and the compacted degree of the stake end regolith considerably beyond existing non-soil compaction stake and the soil compaction pile construction method degree that can reach, thereby increased substantially a native frictional resistance of stake side and a pile ending soil bearing capacity.When handling composite pile foundation, composite foundation and Base Consolidation Engineering, bidirectional helix closed extruding-enlarging aiguille of the present utility model is in work progress, by three step pile hole extruding-extending pore-forming key technologies, it is compacted to make inter-pile soil be subjected to side direction, under the compacted effect effect of this side direction, the intensity of inter-pile soil and deformation characteristic have obtained very big improvement, so the carrying of composite pile foundation, composite foundation and consolidated subsoil and deformation performance have also obtained increasing substantially.
Since bidirectional helix closed extruding-enlarging aiguille can advance bore and carry when boring in the two-way sidewall that the soil body in the stake hole is expressed to a hole, so the stake hole that can avoid being occurred in non-soil compaction pile work method in formation of pile caves in, mud off, pile bottom sediment is blocked up and displacement in the hole and strength retrogression that casting caused pile peripheral earth stress release in hole is caused.Under same stratum, same stake footpath and same stake elongate member, with drilled pile, punching stake, revolve and dig stake or engineering piles type commonly used such as CFA stake is compared, the cylindrical bidirectional helix extruding-enlarging stake of adopting bidirectional helix closed extruding-enlarging aiguille of the present utility model to finish has that bearing capacity is higher, settling amount is littler, better quality, cost are lower, energy consumption still less, work efficiency is higher, remarkable advantage such as environmental protection more.Therefore, bidirectional helix closed extruding-enlarging aiguille of the present utility model has outstanding substantive distinguishing features and significant technological progress.
3. utilize the made bidirectional helix closed extruding of bidirectional helix closed extruding-enlarging aiguille of the present utility model to expand stake and solved the following defective and the problem of the full thread stake and the half-thread stake of prefabricated class pointed in background technology and cast-in-place class: the manufacturing equipment complexity of pre-threaded stake, costliness; The manufacturing of pre-threaded stake, maintenance and be connected complex process, the cost of production height; Pre-threaded stake pile body is longer, transportation difficulty, cost of transportation height; The pre-threaded stake sets power requirement height; Prefabricated semi-screw pile adopts the dither pile-sinking method, can only be applicable to soft soil layer and minor diameter stub.And the stake of perfusion full thread need be with the boring machine preexisting hole; For the real pile body of realizing has 2/3 or the long screw thread of full stake, in the work progress of stake, must adopt complicated simultaneous techniques and technology; Because uncertainty and heterogeneity that the stratum has soil nature and soft or hard to change, be difficult to guarantee in the stake screw thread generative process instantaneous synchronously, therefore may cause part stake screw thread to be difficult to according to the designing requirement moulding; Because these two kinds of piling methods all adopt the long screw auger of equal diameter central tube and longer spiral section, thereby in formation of pile, can consume more rig power, the drilling depth of influence under same formation, identical stake footpath condition, and can't be applied to the firm hard formation situation; The effective diameter that how to define full thread stake or semi-screw pile in designing and calculating does not still have final conclusion, if with the effective diameter of spiral external diameter as stake, may produce the problem of degree of safety aspect, if the problem that then can cause pile capacity to underestimate as the effective diameter of stake with the central tube external diameter.
4. adopt bidirectional helix closed extruding-enlarging aiguille of the present utility model, have high efficiency, one pile work drilling machine day the pile amount can reach 500 to 800 linear meter(lin.m.)s.In addition, bidirectional helix closed extruding-enlarging aiguille work progress of the present utility model is controlled, the pile quality height, and can be under various geological conditionss construction operation.
5. bidirectional helix closed extruding-enlarging aiguille of the present utility model can be implemented bidirectional helix extruding-enlarging stake vertical and inclination, has therefore enlarged the scope of application of bidirectional helix extruding-enlarging stake.
Below in conjunction with drawings and Examples in detail the utility model is described in detail.
Description of drawings
Fig. 1 a~1f among Fig. 1 is for adopting the construction process figure of bidirectional helix closed extruding-enlarging aiguille of the present utility model;
Fig. 2 is the front view of structural representation of a kind of embodiment of bidirectional helix closed extruding-enlarging aiguille of the present utility model;
Fig. 3 is the sectional view of Fig. 2;
Fig. 4 is the main pseudosection of structural representation of the another kind of embodiment of bidirectional helix closed extruding-enlarging aiguille of the present utility model;
Fig. 5 is the main pseudosection of the structural representation of separate type apex point;
Fig. 6 is the main pseudosection of the structural representation of interconnection system apex point.
The specific embodiment
As shown in Figures 2 and 3, bidirectional helix closed extruding-enlarging aiguille of the present utility model, the connecting rod 1 that comprises hollow, be provided with mounting flange 6 on the top of connecting rod 1, its bottom is provided with apex point 5, the bottom of connecting rod 1 is set with down helix extruding-enlarging body 4 from bottom to up successively coaxially, sealed extruding expanding body 3 and movable sealing extruding expanding body 2, movable sealing extruding expanding body 2 is the cross section Rotary-table of diminishing hollow from bottom to top, the lateral wall of movable sealing extruding expanding body 2 is welded with left-handed movable sealing helix extruding-enlarging blade 11, sealed extruding expanding body 3 is the cylinder of hollow, following helix extruding-enlarging body 4 is the Rotary-table of the hollow that increases gradually from bottom to top of cross section, and the lateral wall of following helix extruding-enlarging body 4 is welded with the following helix extruding-enlarging blade 12 of dextrorotation.
As shown in Figure 4, above-mentioned connecting rod 1 also can be the structure that is made into integration with movable sealing extruding expanding body 2, sealed extruding expanding body 3 and following helix extruding-enlarging body 4, promptly adopts known method such as hot investment casting that connecting rod 1 and movable sealing extruding expanding body 2, movable sealing helix extruding-enlarging blade 11, sealed extruding expanding body 3, time helix extruding-enlarging body 4 and following helix extruding-enlarging blade 12 are made one.
The external diameter of above-mentioned movable sealing helix extruding-enlarging blade 11 and following helix extruding-enlarging blade 12 is not more than the external diameter of sealed extruding expanding body 3, and the number of turns of following helix extruding-enlarging blade 12 is more than 2 circles.
The pitch of following helix extruding-enlarging blade 12 is uniform pitch or varying pitch, its uniform pitch S jMathematic(al) representation be:
S j=α 1·D max (j=1,2,…,m)
In the formula,
S j-the size of j pitch (mm) from bottom to up;
J-is the ordinal number of j pitch from bottom to up;
α 1The design factor of-uniform pitch, its span commonly used is 0.5~1.2, the size of value and soil nature, particle diameter, stake footpath are relevant with rotating speed, under normal conditions, if soil nature is hard, the sandstone particle diameter is big, the stake footpath is big or rotating speed when higher, selected numerical value also can be bigger, otherwise then choose less numerical value;
The total pitch number of m-;
D MaxThe external diameter of-sealed extruding expanding body 3 (mm);
The pitch of following helix extruding-enlarging blade 12 is varying pitch S jMathematic(al) representation be:
S j=α 2·D max (j=1)
S j=β j·S j-1 (j=2,3,…,m)
In the formula,
β j = 1 + j - 1 K · m (j=2,3,…,m)
S j-the size of j pitch (mm) from bottom to up;
J-is the ordinal number of j pitch from bottom to up;
α 2-pitch S 1Design factor, its span commonly used is 0.5~1.2, the size of value and soil nature, particle diameter, stake footpath are relevant with rotating speed, under normal conditions, if soil nature is hard, the sandstone particle diameter is big, the stake footpath is big or rotating speed when higher, selected numerical value also can be bigger, otherwise then choose less numerical value;
β j-pitch the enhancement coefficient of j pitch from bottom to up;
K-and α 2The adjustment coefficient that value is relevant, its span commonly used is 1.5~3.0, works as α 2Numerical value when big, K chooses less numerical value, otherwise then chooses bigger numerical value;
The total pitch number of m-;
D MaxThe external diameter of-sealed extruding expanding body 3 (mm).
Spiral shell squares such as the spiral shell square employing of movable sealing helix extruding-enlarging blade 11 of the present utility model, S such as its square such as spiral shell such as grade jMathematic(al) representation be:
S j=α 3·D max (j=1,2,...,n)
In the formula,
S j-the size of j pitch (mm) from top to bottom;
J-is the ordinal number of j pitch from top to bottom;
α 3The design factor of-uniform pitch, its span commonly used is 0.4~1.0; The size of value and particle diameter are relevant with the stake footpath, and under normal conditions, if gravel size is big or stake footpath when big, selected numerical value also can be bigger, otherwise then choose less numerical value;
The total pitch number of n-;
D MaxThe external diameter of-sealed extruding expanding body 3 (mm).
The disclosed varying pitch S of the utility model jFormula is the utility model people taken into full account the soil body volume that come out by rotary drill what, carry between soil nature, particle diameter, stake footpath, bidirectional helix closed extruding-enlarging aiguille rotating speed and the helical blade on the basis of factors such as relation of size of soil body channel cross-sectional area and provide.Adopt the disclosed varying pitch S of the utility model jThe bidirectional helix closed extruding-enlarging aiguille of formulae design, it not only than existing drill bit rate of penetration height, also saves the power of drill power head more when creeping into.
Movable sealing helix extruding-enlarging blade 11 of the present utility model and following helix extruding-enlarging blade 12 are by the height W of root of blade to vane tip SiMathematic(al) representation be:
W si=0.5×(D Li-D Ti)
In the formula,
W Si-helical blade is at the height (mm) at a certain definite height of drill bit place;
D Li-helical blade is at the external diameter (mm) at a certain definite height of drill bit place;
D Ti-movable sealing extruding expanding body 2 or following helix extruding-enlarging body 4 are at the external diameter (mm) at a certain definite height of drill bit place.
The number of turns of following helix extruding-enlarging blade 12 is 2 to 6 circles, in the original position isoplanar of following helix extruding-enlarging blade 12, turn over 180 ° and locate to be provided with the secondary helical blade 9 of half-turn, the direction of rotation of secondary helical blade 9 and spiral shell square are identical with following helix extruding-enlarging blade 12, the cross section of movable sealing helix extruding-enlarging blade 11 and following helix extruding-enlarging blade 12 is the variable cross-section quadrangle, its root thickness is greater than top thickness, in 100mm, the spiral number of turns of above-mentioned movable sealing helix extruding-enlarging blade 11 is 1 to 4 circle to the external diameter of above-mentioned movable sealing helix extruding-enlarging blade 11 than the little scope of the external diameter of sealed extruding expanding body 3.
Be separately installed with a plurality of alloys brill teeth 10 in the bottom of following helix extruding-enlarging blade 12 and the bottom of the secondary helical blade 9 of half-turn.
Apex point 5 shown in Figure 5 is the separate type apex point, the separate type apex point comprises circular terminal pad 14, soffit at terminal pad 14 is provided with cutter head, the middle part of terminal pad 14 upper surfaces has columniform boss 15, be provided with a plurality of locating grooves at the edge of terminal pad 14, each locating groove matches with locating piece 17 respectively, each locating piece 17 is fixedly linked with the bottom of following helix extruding-enlarging body 4 lateral walls respectively, boss 15 is inserted in the hole of connecting rod 1 bottom, and the gap between the centre bore of boss 15 and connecting rod 1 adopts sealing to seal with rubber ring 16.Sealing is in order to prevent that the water in the hole from flowing in the centre bore of connecting rod 1 with rubber ring 16.
Cutter head comprises the large and small brill plate 20,21 of two isosceles triangles that vary in size, the base of large and small brill plate 20,21 is fixedly linked with described terminal pad 14 respectively up, the plate face of large and small brill plate 20,21 is decussation and is connected, and is fixed with sharp bar 22 in wammel plate bottom.Where necessary, can on the following hypotenuse of large and small brill plate 20,21, weld fixing a plurality of alloys and bore tooth.
The separate type apex point is applicable to the stratum that soil nature is harder, after boring finishes, the separate type apex point can be discarded in the bottom in a hole, its detailed process is by the concrete that the through hole via following helix extruding-enlarging body 4 centers pours into down the separate type apex point to be pushed up from the bottom of following helix extruding-enlarging body 4, and abandons in bottom, stake hole.
Apex point 5 shown in Figure 6 is the interconnection system apex point, a side or bilateral at the interconnection system apex point are provided with the one-way cock 23 of pressing the filling piling, the interconnection system apex point is applicable to the stratum that soil nature is harder, after boring finishes, can irritate one-way cock 23 guncreting in the stake hole of piling by the pressure on the interconnection system apex point.Where necessary, can on the following hypotenuse of interconnection system apex point, weld fixing a plurality of alloys and bore tooth.
Shown in Fig. 1 a~1f among Fig. 1, the job practices of bidirectional helix closed extruding-enlarging aiguille of the present utility model comprises following construction sequence:
1) it is in place according to known method the pile work drilling machine of bidirectional helix closed extruding-enlarging aiguille will to be installed, and be ready to concrete pump, and preparation needs the piling of perfusion.Piling is any one of concrete piling or CFG material or tailings mortar piling or cement slag piling etc., and the CFG material is the CFG piling.
2) after the pile work drilling machine that bidirectional helix closed extruding-enlarging aiguille is installed is in place, start pile work drilling machine and apply clockwise moment of torsion and downward axial compression, utilize bidirectional helix closed extruding-enlarging aiguille to creep into squeezed hole, make the rotating speed downward rotary drill squeezed hole of bidirectional helix closed extruding-enlarging aiguille with 4 rev/mins or 6 rev/mins or 8 rev/mins or 10 rev/mins or 12 rev/mins or 14 rev/mins, in this process, be positioned at the soil body that is come out by rotary drill of helix extruding-enlarging body 4 lower sidewall down, can under following helix extruding-enlarging blade 12 effects of following helix extruding-enlarging body 4, do screw from bottom to top and progressively clamp-oned in the sidewall in a hole or be pressed against the lower end of sealed extruding expanding body 3, being closed extruding expanding body 3 subsequently clamp-ons in the sidewall in a hole, stake bore dia after squeezed should adhere to specification, and the backspin machinery squeezed hole process of bidirectional helix closed extruding-enlarging aiguille is till reaching the design hole depth.
3) after squeezed the finishing 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, bidirectional helix closed extruding-enlarging aiguille is moved upward and rotate the extruded and extended pile hole once more, in rotating up squeezed lifting process, the movable sealing extruding expanding body 2 that is positioned at sealed extruding expanding body 3 tops in the stake hole reaches the slump soil body of top on every side, can under movable sealing helix extruding-enlarging blade 11 effect of movable sealing extruding expanding body 2, do top-down screw and clamp-oned in the sidewall in extruded and extended pile stake hole gradually or be pressed against the upper end of sealed extruding expanding body 3, being closed extruding expanding body 3 subsequently clamp-ons in the sidewall in a hole, guaranteeing that once more the stake bore dia after squeezed adheres to specification, second step stake hole machinery squeezing process lasts till that the sealed extruding expanding body 3 of bidirectional helix closed extruding-enlarging aiguille is rotated and rises to the face of land.
4) on beginning, bidirectional helix closed extruding-enlarging aiguille revolves in the squeezed lifting, start concrete pump, irritate to finishing the pressure of carrying out piling in squeezed stake hole, the 3rd a step hole pressure is squeezed to be to carry out under the high pressure effect of concrete pump, squeezed by concrete pressure, can make the pile cutoff of having finished the filling of piling pressure can guarantee that expanded diameter adheres to specification, this hole pressure squeezing process will last till that piling press to irritate till the design elevation of stake top, so far form columniform bidirectional helix extruding-enlarging stake.
Above-mentioned steps 3) bidirectional helix closed extruding-enlarging aiguille is normally with 1 meter/minute or 2 meters/minute or 3 meters/minute or 4 meters/minute in
According to designing requirement, can also in helix extruding-enlarging stake pile body, insert reinforcing cage, tendon or shaped steel according to known method.
Fig. 1 a represents to be equipped with the pile work drilling machine and the concrete pump equipment of bidirectional helix closed extruding-enlarging aiguille; Fig. 1 b represents the bidirectional helix closed extruding-enlarging aiguille lower spiral expanded finished hole; Fig. 1 c represents that the bidirectional helix closed extruding-enlarging aiguille lower spiral expanded finished hole has reached projected depth, stops to creep into; Fig. 1 d represents to revolve on the bidirectional helix closed extruding-enlarging aiguille to carry and bores and guncreting in the stake hole; Fig. 1 e represents to insert in bidirectional helix extruding-enlarging stake pile body, be pressed into or shake into reinforcing cage, tendon or shaped steel; Fig. 1 f represents to implement the columniform bidirectional helix extruding-enlarging stake finished.
The stake footpath that bidirectional helix closed extruding-enlarging aiguille of the present utility model can perform is from 300 to 800mm, and maximum length of pile can reach 36m, and can apply plumb pile or raked pile, and the output torque of pile work drilling machine unit head must reach 15 to 25tm, and maximum can reach 45tm.Axial compression that pile work drilling machine is downward and the power that axially lifts that makes progress require to reach 20 to 40t.The discharge pressure of concrete pump requires greater than 5MPa, and discharge capacity requires to be not less than 30 cubic metres/hour.
The suitable stratum of bidirectional helix closed extruding-enlarging aiguille of the present utility model is extensive, comprise backfill, sand, silt, bury, silty clay, clay, loess, gravel soil, sand pebble soil and severely-weathered soil layer etc., also be applicable to the situation of phreatic high simultaneously.
Pile foundation, composite pile foundation, composite foundation or the ground that the utility model implements to finish handled and reinforced all kinds of engineerings that can be widely used in the civil engineering different field, comprising: high level and superelevation layer residential houses engineering, commercial building engineering, industrial premises engineering, traffic engineering, hydroelectric project and Environmental Engineering etc.
Embodiment recited above is described preferred implementation of the present utility model; be not that design of the present utility model and scope are limited; do not breaking away under the utility model design concept prerequisite; various modification and improvement that engineers and technicians in this area make the technical solution of the utility model; all should fall in the protection domain of the present utility model; the technology contents that the utility model is asked for protection all is documented in claims.

Claims (8)

1. bidirectional helix closed extruding-enlarging aiguille, the connecting rod (1) that comprises hollow, be provided with mounting flange (6) on the top of connecting rod (1), its bottom is provided with apex point (5), the bottom that it is characterized in that described connecting rod (1) is set with or is shaped on down integratedly helix extruding-enlarging body (4) from bottom to up successively coaxially, sealed extruding expanding body (3) and movable sealing extruding expanding body (2), described movable sealing extruding expanding body (2) is the diminishing from bottom to top Rotary-table of cross section, the lateral wall of movable sealing extruding expanding body (2) is provided with left-handed movable sealing helix extruding-enlarging blade (11), described sealed extruding expanding body (3) is a cylinder, described helix extruding-enlarging body (4) down is the Rotary-table that cross section increases from bottom to top gradually, and the lateral wall of following helix extruding-enlarging body (4) is provided with the following helix extruding-enlarging blade (12) of dextrorotation.
2. bidirectional helix closed extruding-enlarging aiguille as claimed in claim 1, it is characterized in that: described movable sealing helix extruding-enlarging blade (11) and the described external diameter of helix extruding-enlarging blade (12) down are not more than the external diameter of described sealed extruding expanding body (3), and the described number of turns of helix extruding-enlarging blade (12) down is more than 2 circles.
3. bidirectional helix closed extruding-enlarging aiguille as claimed in claim 2 is characterized in that: the described pitch of helix extruding-enlarging blade (12) down is uniform pitch or varying pitch, its uniform pitch S jMathematic(al) representation be:
S j=α 1·D max (j=1,2,...,m)
In the formula,
S j-the size of j pitch (mm) from bottom to up;
J-is the ordinal number of j pitch from bottom to up;
α 1The design factor of-uniform pitch, its span are 0.5~1.2;
The total pitch number of m-;
D MaxThe external diameter (mm) of-sealed extruding expanding body (3);
Its varying pitch S jMathematic(al) representation be:
S j=α 2·D max (j=1)
S j=β j·S j-1 (j=2,3,...,m)
In the formula,
β j = 1 + j - 1 K · m (j=2,3,...,m)
S j-the size of j pitch (mm) from bottom to up;
J-is the ordinal number of j pitch from bottom to up;
α 2-pitch S 1Design factor, its span is 0.5~1.2;
β j-pitch the enhancement coefficient of j pitch from bottom to up;
K-and α 2The adjustment coefficient that value is relevant, its span is 1.5~3.0;
The total pitch number of m-;
D MaxThe external diameter (mm) of-sealed extruding expanding body (3).
Spiral shell squares such as the spiral shell square employing of described movable sealing helix extruding-enlarging blade (11) wait spiral shell square S jMathematic(al) representation be:
S j=α 3·D max (j=1,2,...,n)
In the formula,
S j-the size of j pitch (mm) from top to bottom;
J-is the ordinal number of j pitch from top to bottom;
α 3The design factor of-uniform pitch, its span are 0.4~1.0;
The total pitch number of n-;
D MaxThe external diameter (mm) of-sealed extruding expanding body (3).
4. bidirectional helix closed extruding-enlarging aiguille as claimed in claim 3, it is characterized in that: the described number of turns of helix extruding-enlarging blade (12) down is 2 to 6 circles, in the original position isoplanar of following helix extruding-enlarging blade (12), turn over 180 ° and locate to be provided with the secondary helical blade (9) of half-turn, the direction of rotation of secondary helical blade (9) is identical with following helix extruding-enlarging blade (12) with the spiral shell square, described movable sealing helix extruding-enlarging blade (11) and the described cross section of helix extruding-enlarging blade (12) down are the variable cross-section quadrangle, its root thickness is greater than top thickness, in 100mm, the spiral number of turns of movable sealing helix extruding-enlarging blade (11) is 1 to 4 circle to the external diameter of described movable sealing helix extruding-enlarging blade (11) than the little scope of the external diameter of described sealed extruding expanding body (3).
5. bidirectional helix closed extruding-enlarging aiguille as claimed in claim 4 is characterized in that: be separately installed with a plurality of alloys brill teeth (10) in the bottom of described helix extruding-enlarging blade (12) down and the bottom of described secondary helical blade (9).
6. bidirectional helix closed extruding-enlarging aiguille as claimed in claim 5, it is characterized in that: described apex point (5) is the separate type apex point, the separate type apex point comprises circular terminal pad (14), soffit at terminal pad (14) is provided with cutter head, the middle part of terminal pad (14) upper surface has columniform boss (15), edge at terminal pad (14) is provided with a plurality of locating grooves, each locating groove matches with locating piece (17) respectively, each locating piece (17) is fixedly linked with the described bottom of helix extruding-enlarging body (4) lateral wall down respectively, described boss (15) is inserted in the hole of described connecting rod (1) bottom, and the gap between boss (15) and connecting rod (1) centre bore adopts sealing to seal with rubber ring (16).
7. bidirectional helix closed extruding-enlarging aiguille as claimed in claim 6, it is characterized in that: described cutter head comprises the large and small brill plate (20,21) of two isosceles triangles that vary in size, the base of large and small brill plate (20,21) is fixedly linked with described terminal pad (14) respectively up, the plate face of described large and small brill plate (20,21) is decussation and connects, and is fixed with sharp bar (22) in wammel plate bottom.
8. bidirectional helix closed extruding-enlarging aiguille as claimed in claim 5 is characterized in that: described apex point (5) is the interconnection system apex point, is provided with at a side of described interconnection system apex point or bilateral and presses the one-way cock (23) of irritating piling.
CNU200720103635XU 2007-02-15 2007-02-15 Two-directional spiral sealing extrusion and expansion aiguille CN201024899Y (en)

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Cited By (11)

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Publication number Priority date Publication date Assignee Title
CN101812976A (en) * 2010-05-14 2010-08-25 中冶建筑研究总院有限公司 Adjustable multiple coil extruding and expanding drilling tool
CN101858199A (en) * 2010-05-20 2010-10-13 中冶建筑研究总院有限公司 Soil extrusion amount controllable bidirectional spiral extruding and expanding drill
CN102011555A (en) * 2010-09-07 2011-04-13 李新桥 Double-cone and double-helix drill bit for rotary drilling rig
CN102011554A (en) * 2010-09-07 2011-04-13 李新桥 Bipyramid double-helix drill bit used for rotary drilling rig and provided with torpedo warhead at bottom end
CN102011553A (en) * 2010-09-07 2011-04-13 李新桥 Double-helix drill bit of rotary drilling rig
CN102011552A (en) * 2010-09-07 2011-04-13 李新桥 Single-cone single spiral drill bit of rotary drilling rig
CN102296509A (en) * 2011-06-21 2011-12-28 北京航空航天大学 Foundation treatment method for exactly regulating foundation settlement, and construction device
CN104153712A (en) * 2014-08-20 2014-11-19 中化岩土工程股份有限公司 Pore-forming device for gravelly ground
CN104533293A (en) * 2014-11-13 2015-04-22 天地科技股份有限公司 Anti-collapse hole drill bit for coal mine roadway rock and soil reinforcement
CN107575162A (en) * 2017-09-15 2018-01-12 陈彬 A kind of perforating device for building and its method of work
CN109236191A (en) * 2018-11-06 2019-01-18 中铁六局集团有限公司 Long spire modified drilling pouring pile hole construction method

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101812976B (en) * 2010-05-14 2013-05-15 中冶建筑研究总院有限公司 Adjustable multiple coil extruding and expanding drilling tool
CN101812976A (en) * 2010-05-14 2010-08-25 中冶建筑研究总院有限公司 Adjustable multiple coil extruding and expanding drilling tool
CN101858199A (en) * 2010-05-20 2010-10-13 中冶建筑研究总院有限公司 Soil extrusion amount controllable bidirectional spiral extruding and expanding drill
CN101858199B (en) * 2010-05-20 2014-03-05 中冶建筑研究总院有限公司 Soil extrusion amount controllable bidirectional spiral extruding and expanding drill
CN102011554A (en) * 2010-09-07 2011-04-13 李新桥 Bipyramid double-helix drill bit used for rotary drilling rig and provided with torpedo warhead at bottom end
CN102011553A (en) * 2010-09-07 2011-04-13 李新桥 Double-helix drill bit of rotary drilling rig
CN102011552A (en) * 2010-09-07 2011-04-13 李新桥 Single-cone single spiral drill bit of rotary drilling rig
CN102011552B (en) * 2010-09-07 2013-01-16 李新桥 Single-cone single spiral drill bit of rotary drilling rig
CN102011555A (en) * 2010-09-07 2011-04-13 李新桥 Double-cone and double-helix drill bit for rotary drilling rig
CN102011554B (en) * 2010-09-07 2013-01-16 李新桥 Bipyramid double-helix drill bit used for rotary drilling rig and provided with torpedo warhead at bottom end
CN102296509B (en) * 2011-06-21 2013-09-18 北京航空航天大学 Foundation treatment method for exactly regulating foundation settlement, and construction device
CN102296509A (en) * 2011-06-21 2011-12-28 北京航空航天大学 Foundation treatment method for exactly regulating foundation settlement, and construction device
CN104153712A (en) * 2014-08-20 2014-11-19 中化岩土工程股份有限公司 Pore-forming device for gravelly ground
CN104533293A (en) * 2014-11-13 2015-04-22 天地科技股份有限公司 Anti-collapse hole drill bit for coal mine roadway rock and soil reinforcement
CN107575162A (en) * 2017-09-15 2018-01-12 陈彬 A kind of perforating device for building and its method of work
CN109236191A (en) * 2018-11-06 2019-01-18 中铁六局集团有限公司 Long spire modified drilling pouring pile hole construction method
CN109236191B (en) * 2018-11-06 2019-11-12 中铁六局集团有限公司 Long spire modified drilling pouring pile hole construction method

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