CN109778847A - A kind of construction method and device of cast-in-place concrete pile - Google Patents
A kind of construction method and device of cast-in-place concrete pile Download PDFInfo
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- CN109778847A CN109778847A CN201910211363.2A CN201910211363A CN109778847A CN 109778847 A CN109778847 A CN 109778847A CN 201910211363 A CN201910211363 A CN 201910211363A CN 109778847 A CN109778847 A CN 109778847A
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Abstract
The invention discloses a kind of construction method of cast-in-place concrete pile and devices, its technology characteristics is that preset ring cone-shaped cavity forming is carried out in drilling machine pore forming process, drilling itself and the ring cone-shaped cavity along the single or multiple intervals of stake holes are formed behind whole hole, borehole cleaning, after hanging steel reinforcement cage, secondary pile hole cleaning and concrete perfusion, stake holes becomes pile body, and cavity becomes disk body.Acyclic cone-shaped cavity is preset, stake holes becomes pile body after whole hole concrete perfusion.After concrete reaches predetermined strength, implement continuous multiple spot in the predetermined altitude range of disk body lower part and/or stake bottom and is overlapped mutually and/or is abound with high-pressure mortar spraying, whitewashing makes soil cement made of slurries and soil body mix be connected, the induration of an entirety is formed after hardening to hold in the palm tray body (containing multiple disk bodies) and/or stake bottom (bottom containing a clump of piles), to increase substantially bearing capacity of pile foundation, be substantially reduced settlement and differential settlement.
Description
[technical field]
The present invention relates to the construction method of the cast-in-place concrete pile of field of civil engineering, especially a kind of pile body is equipped with single
Or multiple disk bodies and below disk body, without disk body when under stake just in a manner of high-pressure injection slip casting to form load platform
Cast-in-place concrete pile.
[background technique]
In order to overcome conventional drilling cast-in-place concrete pile pile bottom sediment to be difficult to handle and pile body periphery mudcake interlayer frictional resistance
There are the works such as expansion disk/support disk pile technique and stake bottom, stake week slip casing by pressure technique in civil engineering practice process in lower problem
Skill.Compared with conventional cast-in-situ bored pile, process above is to raising bearing capacity of single pile and reduces settlement amount of pile foundation, reduction project cost
Deng effective, but its there is also apparent defects, simple cutting is expanded for disk technique, cutting process has disturbed disk chamber week
The undisturbed soil on side, Cheng Panhou easily makes disk body generate biggish sedimentation and deformation in disk stress, so as to cause the sedimentation and deformation of pile body.
It is preferred for compacted bearing disk pile, branch and disk through multiple corner, superposition is squeezed forms, exist at second and when subsequent squeezed
Soil is squeezed into a possibility that front and continued is completed in cavity, and it leaves a question open at the integrality and quality of disk, existing detection means
The integrality and quality of disk can not effectively be detected into, moreover, for individually propping up and the testing result of disk, can not determine at all be
At branch or at disk；Secondly, boring, squeezing two-step two sets of equipment of needs, there are difficulty of construction to increase, process efficiency is not low, squeezed
The problems such as pile perimeter resistance at position cannot be reinforced.For stake bottom, cement paste around pile technique, practical poor controllability is not only starched
The actual dispersion range of liquid and direction are unable to control and guarantee, the uniformity of slip casting result, which exists, to be fundamentally unable to control and guarantee
The problem of, the result is that the bearing capacity of adjacent studs and sedimentation and deformation discreteness are larger.
[summary of the invention]
In view of the foregoing drawbacks, the present invention provides a kind of construction method of cast-in-place concrete pile and devices.
A kind of construction method of cast-in-place concrete pile, which is characterized in that the construction method of the cast-in-place concrete pile includes
Following steps:
The construction of stake holes is carried out with drilling machine by the structure for the stake being pre-designed；
When the structure of the stake being pre-designed is preset with ring cone-shaped cavity, used simultaneously in the work progress of the stake holes
Forming device is preset in the stake holes and carries out the forming of ring cone-shaped cavity at absolute altitude, then the drilling machine pore-forming to whole hole；
When the structure of the stake being pre-designed presets acyclic cone-shaped cavity, the drilling machine directly carries out pore-forming to whole hole；
Borehole cleaning is carried out to the stake holes, steel reinforcement cage and conduit is hung to the stake holes, the stake holes is carried out clear for the second time
Hole makes the stake holes and/or the ring cone-shaped cavity fill concrete, institute the stake holes concrete perfusion to default absolute altitude
The stake holes becomes pile body after stating concrete hardening, and the ring cone-shaped cavity becomes disk body；
After the concrete reaches predetermined strength, with high pressure jet grouting device to the disk body lower part and/or described
The soil body in the predetermined elevation range in stake bottom of pile body carries out continuous multiple spot and the high-pressure mortar spraying that is overlapped mutually and/or is abound with height
Pressure whitewashing.
It optionally, is to be communicated as one on the outside of the stake holes and with the stake holes presetting the ring cone-shaped cavity
, continuous and uninterrupted or intermittent cavity, be coaxial relation with the stake holes；
Absolute altitude, cavity size and the quantity of the ring cone-shaped cavity are configured according to the design requirement of the stake holes.
Optionally, the generation type of the ring cone-shaped cavity is rotary cutting mode and/or fashion of extrusion.
Optionally, to setting or do not set reinforcing bar or fashioned iron in the ring cone-shaped cavity.
Optionally, the high-pressure mortar spraying using rotating-spray or vectored injection or swings the single pipe method sprayed or multitube method；
The gunite material of the high-pressure mortar spraying includes and is not limited to water, compressed gas, cement, cement additive or blending
Agent；
Setting, whitewashing amount, injection pressure, whitewashing radius and the range of the high-pressure mortar spraying, are bored at whitewashing range superposition rate
Bar promotion/decrease speed and rotation speed are default, or are adjusted according to the variations of the practical physical characteristics of the soil body.
Optionally, to the high-pressure mortar spraying implementing continuous multiple spot in the predetermined altitude range of the disk body lower part and being overlapped mutually, spray
Starching setting is setting quantity 1 or more around the pile body and the predeterminated position other than the disk body perspective plane；Or
Before the structure by the stake being pre-designed carries out the construction of stake holes with drilling machine, predetermined altitude at absolute altitude is preset to the stake holes
The high-pressure mortar spraying implementing continuous multiple spot in advance in range and being overlapped mutually reaches preset strength to the soil cement in the altitude range
The construction of stake holes is carried out with drilling machine by the structure for the stake being pre-designed again afterwards and ring taper is carried out in the predetermined altitude range
Cavity forming；
High-pressure mortar spraying process is that setting successively continuously whitewash simultaneously by whitewashing or each setting, the whitewashing model of adjacent setting
It encloses and is overlapped by preset superposition rate；The continuous multiple spot and high-pressure mortar spraying being overlapped mutually will be made of the mix of single disk body lower part
Soil cement is connected, and becomes the whole induration that support holds single disk body after soil cement hardening.
Optionally, to the more pile bodies or a clump of piles with implementing within the scope of multiple disk body lower part preset heights of absolute altitude
The continuous multiple spot of default setting and what is be overlapped mutually be abound with whitewashing, by the more pile bodies or a clump of piles with absolute altitude it is multiple described in
The soil cement of disk body lower part is connected, and forms one and includes cement including multiple single-deck lower part soil cements and bigger
The soil body becomes support after soil-cement body hardening and holds the more stakes or a clump of piles with the induration cushion cap of the multiple disk bodies of absolute altitude.
Optionally, when presetting acyclic cone-shaped cavity/disk body, to real in the stake bottom predetermined altitude range of the pile body
The high-pressure mortar spraying applying continuous multiple spot and being overlapped mutually, spray operation point are the default position around pile body and other than pile body perspective plane
It sets, setting quantity 1 or more, whitewashing process is that setting successively continuously whitewash simultaneously by whitewashing or each setting；
The whitewashing range of adjacent setting is overlapped by preset superposition rate；
The continuous multiple spot and soil cement of the stake bottom of the single pile body is connected by the high-pressure mortar spraying being overlapped mutually,
Become the induration that support holds a bottom after soil cement hardening.
Optionally, when presetting acyclic cone-shaped cavity/disk body, to the same grade stake bottom of multiple pile bodies or a clump of piles
Implement the continuous multiple spot of default setting in predetermined altitude range and what is be overlapped mutually be abound with high-pressure mortar spraying, by multiple pile bodies
Or the soil cement of clump of piles stake bottom is connected, and forms one and exists comprising multiple pile bodies or clump of piles stake bottom soil cement
Interior bigger soil-cement body becomes the induration cushion cap that support holds multiple pile bodies or clump of piles stake bottom after soil-cement body hardening.
In addition the present invention also proposes a kind of construction equipment of cast-in-place concrete pile, which is characterized in that the filling concrete
The construction of stake is set including pore-forming drill, ring cone-shaped cavity former, high pressure jet grouting device；
The pore-forming drill is used for the structure construction for carrying out stake holes by the stake being pre-designed；
The ring cone-shaped cavity former, which is used to preset in the stake holes, carries out the forming of ring cone-shaped cavity at absolute altitude；
The high pressure jet grouting device is for the soil in the predetermined elevation range in stake bottom of disk body lower part and/or pile body
Body carries out continuous multiple spot and the high-pressure mortar spraying that is overlapped mutually and/or is abound with high-pressure mortar spraying.
Beneficial effects of the present invention: Gu default disk body in the present invention and disk body or pile body lower part formed consolidation object/
Knot body cushion cap technique, especially disk body or pile body lower part form consolidation object/induration cushion cap technique, will be to field of civil engineering
Pile foundation construction generates great technological innovation, not only can greatly high single pile, more or a clump of piles bearing capacity, but also can be with
Significantly reduce the settlement difference and thus caused settlement issues, and cavity forming process and whitewashing process even removed in industry
It is non-cross, work efficiency can be significantly improved.Whole set process will also significantly reduce project cost, more reasonably shorten the construction period.
[Detailed description of the invention]
Fig. 1 is the method flow diagram of the construction method embodiment one of cast-in-place concrete pile provided by the invention.
Fig. 2 is the method flow diagram of the construction method embodiment two of cast-in-place concrete pile provided by the invention.
Fig. 3 is the method flow diagram of the construction method embodiment three of cast-in-place concrete pile provided by the invention.
Fig. 4 is the method flow diagram of the construction method example IV of cast-in-place concrete pile provided by the invention.
Fig. 5 is the equipment structure chart of the construction equipment embodiment five of cast-in-place concrete pile provided by the invention.
Fig. 6 is the construction equipment drilling rotary-cut all-in-one machine schematic diagram of cast-in-place concrete pile provided by the invention.
Fig. 7 is single-deck body provided by the invention lower part high-pressure mortar spraying consolidation object schematic diagram.
Fig. 8 is polydisc body provided by the invention lower part high-pressure mortar spraying consolidation object schematic diagram.
[specific embodiment]
It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not intended to limit the present invention.
Embodiment one
With reference to Fig. 1, a kind of construction method of cast-in-place concrete pile, comprising:
S101, the construction for carrying out stake holes with drilling machine by the structure for the stake being pre-designed.
Before the construction for carrying out stake holes with drilling machine by the structure for the stake being pre-designed, stake holes is preset and makes a reservation for height at absolute altitude
The high-pressure mortar spraying implementing continuous multiple spot in advance in degree range and being overlapped mutually reaches default strong to the soil cement in the altitude range
Carry out the construction of stake holes after degree with drilling machine by the structure for the stake being pre-designed again.
According to the structure for the stake being pre-designed, the processes such as site localization, embedded casing and drilling machine before carrying out pore-forming are in place.
Drilling machine pore-forming technique is the non-mud off pore-forming of mud off pore-forming or other forms；Pore-forming drill be drilling machine or
The integrated apparatus that drilling machine and stake holes ring cone-shaped cavity former are composed, as shown in Figure 6.It is controlled and the method for operation is certainly
Dynamic or manually operation and control mode.
S102, the stake being pre-designed structure when being preset with ring cone-shaped cavity, in the work progress of the stake holes
It is preset simultaneously with forming device in the stake holes and carries out ring cone-shaped cavity forming at absolute altitude, then the drilling machine pore-forming to whole hole.
Drilling machine drilling and forming hole is formed pre- when drilling is to default ring cone-shaped cavity position absolute altitude to stake holes lateral direction rotary-cut
The ring cone-shaped cavity first designed after the completion of cavity rotary-cut, continues downward pore-forming；It can also use to stake holes lateral direction extruding side
Formula forms the ring cone-shaped cavity being pre-designed.Stake holes rotary-cut all-in-one machine schematic diagram as shown in Figure 6.
Ring cone-shaped cavity is to surround being communicated as one on the outside of stake holes and with stake holes, continuous and uninterrupted or intermittent chamber
Body is coaxial relation with stake holes.Absolute altitude, cavity size and the quantity of ring cone-shaped cavity are to be pre-designed.When ring cone-shaped cavity institute
The practical physical characteristics of place's soil body are when changing, and simultaneously adjustment ring cone-shaped cavity should be recalculated according to its practical testing result
Actual setting absolute altitude, cavity size and quantity.Wherein, the quantity of ring cone-shaped cavity is than or equal to 1, i.e., at least apart from stake holes
It is basis quantity 1 that one ring cone-shaped cavity (partially be stake root below cavity) is arranged at a certain distance from bottom, along stake holes from upper
Cavity under and is not necessarily at equal intervals.
While continuing downward pore-forming, it is sequentially completed the forming of each ring cone-shaped cavity, until being drilled into design stake bottom absolute altitude, eventually
Hole.
S103, borehole cleaning is carried out to the stake holes, hangs steel reinforcement cage and conduit to the stake holes, second is carried out to the stake holes
Secondary borehole cleaning makes the stake holes and the ring cone-shaped cavity fill concrete, institute the stake holes concrete perfusion to default absolute altitude
The stake holes becomes pile body after stating concrete hardening, and the ring cone-shaped cavity becomes disk body.
Material, production processing and the quality requirement of steel reinforcement cage and ingredient, proportion, quality and the intensity of concrete are (containing predetermined
Intensity) it requires to be to be pre-designed.
After borehole cleaning, drilling machine keeps rotation status but does not creep into, it is therefore an objective to blend the bulk soil body remaining in hole clearly
Except clean and adjust mud balance；Drilling machine is promoted, stake holes is detected, hangs steel reinforcement cage and conduit after detection is qualified.In steel
At muscle cage absolute altitude identical with hole inner ring cone-shaped cavity, it is arranged or is not provided with mobilizable reinforcing bar according to the disk body counter-force size
Or fashioned iron.
Secondary pile hole cleaning is carried out, the sediment generated when hanging steel reinforcement cage is removed.A borehole cleaning is completed according to pre-set programs, is being hung
Steel reinforcement cage is put to after setting absolute altitude, hang conduit and secondary pile hole cleaning, disposable concrete perfusion is being preset with ring to absolute altitude is set
When cone-shaped cavity, concrete is made to fill entire stake holes and all ring cone-shaped cavities.
S104, after the concrete reaches predetermined strength, it is predetermined to the disk body lower part with high pressure jet grouting device
The soil body in elevation range carries out continuous multiple spot and the high-pressure mortar spraying that is overlapped mutually and/or is abound with high-pressure mortar spraying.
When concrete strength of pile reaches predetermined strength or more, disk body lower part high-pressure mortar spraying can be carried out.
Whitewashing mode is preset as high pressure or superhigh pressure jetting slip casting, and rotating-spray or vectored injection can be used or swing injection
Single pipe method or multitube method.Wherein, gunite material includes and is not limited to water, compressed gas, cement, cement additive or blending
Agent.The setting of high-pressure mortar spraying, whitewashing amount, injection pressure, whitewashing radius and range, whitewashing range superposition rate, drilling rod promote/under
Reduction of speed degree and rotation speed are default, or are adjusted according to the variations of the practical physical characteristics of the soil body.High pressure or super-pressure spray
Penetrating grouting device is high-pressure jet complexes (such as: high-pressure rotary jetting apparatus), and control and the method for operation are automatic and/or artificial
Operation and control mode manually.
To the high-pressure mortar spraying implementing continuous multiple spot in the predetermined altitude range of single disk body lower part and being overlapped mutually, spray operation point
For around pile body and the predeterminated position other than disk body perspective plane, setting quantity is not less than 1.Whitewashing process be setting according to
Secondary continuous whitewashing or each setting are whitewashed simultaneously, and the whitewashing range of adjacent setting is overlapped by preset superposition rate.Continuously
Multiple spot and soil cement made of the mix of single disk body lower part is connected by the high-pressure mortar spraying being overlapped mutually, after soil cement hardening at
To hold in the palm the whole induration for holding single disk body.As shown in fig. 7, P41 is that whitewashing reinforcing body, P42 are load disk body, P43 under disk body
For main pile body.
Embodiment two
With reference to Fig. 2, the present embodiment increases following steps on the basis of example 1:
S105, the more pile bodies or a clump of piles are implemented in advance within the scope of multiple disk body lower part preset heights of absolute altitude
If the continuous multiple spot of setting and what is be overlapped mutually be abound with whitewashing, by the more pile bodies or a clump of piles with multiple disks of absolute altitude
The soil cement of body lower part is connected, and forms one and includes soil cement including multiple single-deck lower part soil cements and bigger
Body becomes support after soil-cement body hardening and holds the more stakes with the induration cushion cap of the multiple disk bodies of absolute altitude.
For more or a clump of piles, can implement to connect within the scope of multiple disk body lower parts preset height of same absolute altitude by being pre-designed
What continuous multiple spot was overlapped mutually is abound with high-pressure mortar spraying, and more piles are connected with the soil cement of multiple disk body lower parts of absolute altitude, shape
Include soil-cement body including the soil cement of multiple single-deck lower parts and bigger at one, becomes support after soil-cement body hardening and hold more
Induration cushion cap of the stake with the multiple disk bodies of absolute altitude.As shown in figure 8, P51 be whitewash under disk body reinforcing body, P52 be load disk body,
P53 is main pile body.
Embodiment three
With reference to Fig. 3, a kind of construction method of cast-in-place concrete pile, comprising:
S201, the construction for carrying out stake holes with drilling machine by the structure for the stake being pre-designed.
According to the structure for the stake being pre-designed, the processes such as site localization, embedded casing and drilling machine before carrying out pore-forming are in place.
Drilling machine pore-forming technique is the non-mud off pore-forming of mud off pore-forming or other forms；Pore-forming drill be drilling machine or
The integrated apparatus that drilling machine and stake holes ring cone-shaped cavity former are composed, control and the method for operation are automatic or manual hand
Dynamic operation and control mode.
S202, the stake being pre-designed structure when presetting acyclic cone-shaped cavity, the drilling machine directly carries out pore-forming extremely
Whole hole.
Drilling machine drilling and forming hole, until being drilled into design stake bottom absolute altitude, whole hole.
S203, borehole cleaning is carried out to the stake holes, hangs steel reinforcement cage and conduit to the stake holes, second is carried out to the stake holes
Secondary borehole cleaning makes the stake holes fill concrete, institute after the concrete hardening stake holes concrete perfusion to default absolute altitude
Stake holes is stated as pile body.
Material, production processing and the quality requirement of steel reinforcement cage and ingredient, proportion, quality and the intensity of concrete are (containing predetermined
Intensity) it requires to be to be pre-designed.
After borehole cleaning, drilling machine keeps rotation status but does not creep into, it is therefore an objective to blend the bulk soil body remaining in hole clearly
Except clean and adjust mud balance；Drilling machine is promoted, stake holes is detected, hangs steel reinforcement cage and conduit after detection is qualified.
Secondary pile hole cleaning is carried out, the sediment generated when hanging steel reinforcement cage is removed.A borehole cleaning is completed according to pre-set programs, is being hung
Steel reinforcement cage is put to after setting absolute altitude, hang conduit and secondary pile hole cleaning, disposable concrete perfusion is to setting absolute altitude.
S204, after the concrete reaches predetermined strength, with high pressure jet grouting device to the stake of the pile body under
The soil body in the predetermined elevation range in portion carries out continuous multiple spot and the high-pressure mortar spraying that is overlapped mutually and/or is abound with high-pressure mortar spraying.
When concrete strength of pile reaches predetermined strength or more, the lower part high-pressure mortar spraying of pile body bottom can be carried out.
Whitewashing mode is preset as high pressure or superhigh pressure jetting slip casting, and rotating-spray or vectored injection can be used or swing injection
Single pipe method or multitube method.Wherein, gunite material includes and is not limited to water, compressed gas, cement, cement additive or blending
Agent.The setting of high-pressure mortar spraying, whitewashing amount, injection pressure, whitewashing radius and range, whitewashing range superposition rate, drilling rod promote/under
Reduction of speed degree and rotation speed are default, or are adjusted according to the variations of the practical physical characteristics of the soil body.High pressure or super-pressure spray
Penetrating grouting device is high-pressure jet complexes (such as: high-pressure rotary jetting apparatus), and control and the method for operation are automatic and/or artificial
Operation and control mode manually.
To the high-pressure mortar spraying implementing continuous multiple spot in the predetermined altitude range of Single Pile bottom and being overlapped mutually, spray operation point
For around pile body and the predeterminated position other than disk body perspective plane, setting quantity is not less than 1.Whitewashing process be setting according to
Secondary continuous whitewashing or each setting are whitewashed simultaneously, and the whitewashing range of adjacent setting is overlapped by preset superposition rate.Continuously
Multiple spot and soil cement made of the mix of single disk body lower part is connected by the high-pressure mortar spraying being overlapped mutually, after soil cement hardening at
To hold in the palm the whole induration for holding single disk body.
Example IV
With reference to Fig. 4, the present embodiment increases following steps on the basis of embodiment three:
S205, setting is preset with implementation in the stake bottom predetermined altitude range of absolute altitude to multiple pile bodies or a clump of piles
Continuous multiple spot and what is be overlapped mutually be abound with high-pressure mortar spraying, the soil cement of the stake bottom of multiple pile bodies or a clump of piles is linked to be
One forms the bigger soil-cement body including a stake bottom soil cement comprising multiple pile bodies or a clump of piles, cement
Become the induration cushion cap that support holds multiple pile bodies or clump of piles stake bottom after soil body hardening.
Embodiment five
With reference to Fig. 5, a kind of construction equipment of cast-in-place concrete pile, the construction equipment, comprising: P31 pore-forming drill, P32 ring
Cone-shaped cavity former, P33 high pressure jet grouting device.
1) P31 pore-forming drill is used for the structure construction for carrying out stake holes by the stake being pre-designed；
2) P32 ring cone-shaped cavity former, which is used to preset in the stake holes, carries out the forming of ring cone-shaped cavity at absolute altitude；
3) P33 high pressure jet grouting device is for the soil body in the predetermined elevation range in stake bottom of disk body lower part and pile body
It carries out continuous multiple spot and the high-pressure mortar spraying that is overlapped mutually and is abound with high-pressure mortar spraying.
Default disk body in the present invention and consolidation object/induration cushion cap technique is formed in disk body or pile body lower part, especially
It is that consolidation object/induration cushion cap technique is formed at disk body or pile body lower part, weight will be generated to the pile foundation construction of field of civil engineering
Big technological innovation, not only can greatly high single pile, more or a clump of piles bearing capacity, but also can be significantly reduced even except row
Settlement difference in the industry and thus caused by settlement issues, and cavity forming process and process of whitewashing are non-cross, Ke Yiming
It is aobvious to improve work efficiency.Whole set process will also significantly reduce project cost, more reasonably shorten the construction period.
It should be noted that, in this document, the terms "include", "comprise" or its any other variant are intended to non-row
His property includes, so that the process, method, article or the device that include a series of elements not only include those elements, and
And further include other elements that are not explicitly listed, or further include for this process, method, article or device institute it is intrinsic
Element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that including being somebody's turn to do
There is also other identical elements in the process, method of element, article or device.
The serial number of the above embodiments of the invention is only for description, does not represent the advantages or disadvantages of the embodiments.
The embodiment of the present invention is described with above attached drawing, but the invention is not limited to above-mentioned specific
Embodiment, the above mentioned embodiment is only schematical, rather than restrictive, those skilled in the art
Under the inspiration of the present invention, without breaking away from the scope protected by the purposes and claims of the present invention, it can also make very much
Form, all of these belong to the protection of the present invention.
Claims (10)
1. a kind of construction method of cast-in-place concrete pile, which is characterized in that the construction method of the cast-in-place concrete pile includes such as
Lower step:
The construction of stake holes is carried out with drilling machine by the structure for the stake being pre-designed；
When the structure of the stake being pre-designed is preset with ring cone-shaped cavity, simultaneously with forming in the work progress of the stake holes
Device is preset in the stake holes and carries out the forming of ring cone-shaped cavity at absolute altitude, then the drilling machine pore-forming to whole hole；
When the structure of the stake being pre-designed presets acyclic cone-shaped cavity, the drilling machine directly carries out pore-forming to whole hole；
Borehole cleaning is carried out to the stake holes, steel reinforcement cage and conduit is hung to the stake holes, second of borehole cleaning is carried out to the stake holes, it is right
The stake holes concrete perfusion makes the stake holes and/or the ring cone-shaped cavity fill concrete, the coagulation to default absolute altitude
The stake holes becomes pile body after soil hardening, and the ring cone-shaped cavity becomes disk body；
After the concrete reaches predetermined strength, with high pressure jet grouting device to the disk body lower part and/or the pile body
The predetermined elevation range in stake bottom in the soil body carry out continuous multiple spot and the high-pressure mortar spraying that is overlapped mutually and/or be abound with high pressure spray
Slurry.
2. the construction method of cast-in-place concrete pile according to claim 1, which is characterized in that presetting the ring conical cavity
Body is be communicated as one on the outside of the stake holes and with the stake holes, continuous and uninterrupted or intermittent cavity, and described
Stake holes is coaxial relation；
Absolute altitude, cavity size and the quantity of the ring cone-shaped cavity are configured according to the design requirement of the stake holes.
3. the construction method of cast-in-place concrete pile according to claim 1, which is characterized in that the shape of the ring cone-shaped cavity
It is rotary cutting mode and/or fashion of extrusion at mode.
4. the construction method of cast-in-place concrete pile according to claim 1, which is characterized in that in the ring cone-shaped cavity
If or not setting reinforcing bar or fashioned iron.
5. the construction method of cast-in-place concrete pile according to claim 1, which is characterized in that the high-pressure mortar spraying is using rotation
Turn injection or vectored injection or swings the single pipe method or multitube method of injection；
The gunite material of the high-pressure mortar spraying includes and is not limited to water, compressed gas, cement, cement additive or admixture；
Setting, whitewashing amount, injection pressure, whitewashing radius and the range of the high-pressure mortar spraying, whitewashing range superposition rate, drilling rod mention
Liter/decrease speed and rotation speed are default, or are adjusted according to the variations of the practical physical characteristics of the soil body.
6. the construction method of cast-in-place concrete pile according to claim 1, which is characterized in that predetermined to the disk body lower part
Implement the high-pressure mortar spraying that continuous multiple spot is overlapped mutually in altitude range, spray operation point is around the pile body and in the disk body
Predeterminated position other than perspective plane, setting quantity 1 or more；Or
Before the structure by the stake being pre-designed carries out the construction of stake holes with drilling machine, the stake holes is preset pre- at absolute altitude
Determine the high-pressure mortar spraying implementing continuous multiple spot in advance in altitude range and being overlapped mutually, reaches pre- to the soil cement in the altitude range
If carrying out the construction of stake holes with drilling machine by the structure for the stake being pre-designed again after intensity and being carried out in the predetermined altitude range
The forming of ring cone-shaped cavity；
High-pressure mortar spraying process is that setting successively continuously whitewash simultaneously by whitewashing or each setting, and the whitewashing range of adjacent setting is pressed
Preset superposition rate is overlapped；Continuous multiple spot and the high-pressure mortar spraying being overlapped mutually are by cement made of the mix of single disk body lower part
Soil is connected, and becomes the whole induration that support holds single disk body after soil cement hardening.
7. the construction method of cast-in-place concrete pile according to claim 6, which is characterized in that
To the more pile bodies or a clump of piles with the default setting of implementation within the scope of multiple disk body lower part preset heights of absolute altitude
Continuous multiple spot and what is be overlapped mutually be abound with whitewashing, by the more pile bodies or a clump of piles with multiple disk body lower parts of absolute altitude
Soil cement is connected, and forms one and includes soil-cement body including multiple single-deck lower part soil cements and bigger, cement
Become support after soil body hardening and holds the more stakes with the induration cushion cap of the multiple disk bodies of absolute altitude.
8. the construction method of cast-in-place concrete pile according to claim 1, which is characterized in that presetting acyclic conical cavity
When body/disk body, to the high-pressure mortar spraying implementing continuous multiple spot in the stake bottom predetermined altitude range of the pile body and being overlapped mutually,
Spray operation point is setting quantity 1 or more around pile body and the predeterminated position other than pile body perspective plane, and whitewashing process is
Setting successively continuously whitewash simultaneously by whitewashing or each setting；
The whitewashing range of adjacent setting is overlapped by preset superposition rate；
The continuous multiple spot and soil cement of the stake bottom of the single pile body is connected by the high-pressure mortar spraying being overlapped mutually, cement
Become the induration that support holds a bottom after soil hardening.
9. the construction method of cast-in-place concrete pile according to claim 8, which is characterized in that presetting acyclic conical cavity
When body/disk body, to the default setting of implementation in the same grade stake bottom predetermined altitude range of multiple pile bodies or a clump of piles
Continuous multiple spot and what is be overlapped mutually be abound with high-pressure mortar spraying, is linked to be one for the soil cement of the stake bottom of multiple pile bodies or a clump of piles
Body forms the bigger soil-cement body including a stake bottom soil cement comprising multiple pile bodies, soil-cement body hardening
Become the induration cushion cap that support holds the stake bottom of multiple pile bodies afterwards.
10. a kind of construction equipment of cast-in-place concrete pile, which is characterized in that the construction of the cast-in-place concrete pile is set including pore-forming
Drilling machine, ring cone-shaped cavity former, high pressure jet grouting device；
The pore-forming drill is used for the structure construction for carrying out stake holes by the stake being pre-designed；
The ring cone-shaped cavity former, which is used to preset in the stake holes, carries out the forming of ring cone-shaped cavity at absolute altitude；
The high pressure jet grouting device for disk body lower part and/or pile body the predetermined elevation range in stake bottom in the soil body into
The continuous multiple spot of row and the high-pressure mortar spraying being overlapped mutually and/or it is abound with high-pressure mortar spraying.
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| CN110886292A (en) * | 2019-11-29 | 2020-03-17 | 裴晓峰 | Full-casing composite expanded-disk pile construction method and equipment |
| CN112211186A (en) * | 2020-09-30 | 2021-01-12 | 裴隽仪 | Post-tensioning unbonded prestressed anchoring pile structure and construction method thereof |
| WO2021103209A1 (en) * | 2019-11-29 | 2021-06-03 | 祝波 | Composite expanded-plate pile construction method and equipment |
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| CN109778847B (en) | 2021-04-09 |
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