CN110016911A - Construction process for mechanical pore-forming pile forming of deep pile casing - Google Patents
Construction process for mechanical pore-forming pile forming of deep pile casing Download PDFInfo
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- CN110016911A CN110016911A CN201910368323.9A CN201910368323A CN110016911A CN 110016911 A CN110016911 A CN 110016911A CN 201910368323 A CN201910368323 A CN 201910368323A CN 110016911 A CN110016911 A CN 110016911A
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- 238000000034 method Methods 0.000 title claims abstract description 41
- 238000010276 construction Methods 0.000 title claims abstract description 40
- 239000002689 soil Substances 0.000 claims abstract description 81
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 43
- 239000010959 steel Substances 0.000 claims abstract description 43
- 238000005553 drilling Methods 0.000 claims abstract description 31
- 238000013461 design Methods 0.000 claims abstract description 24
- 230000002787 reinforcement Effects 0.000 claims abstract description 15
- 238000005266 casting Methods 0.000 claims description 24
- 230000003014 reinforcing effect Effects 0.000 claims description 9
- 239000002131 composite material Substances 0.000 claims description 5
- 210000003205 muscle Anatomy 0.000 claims description 4
- 238000009412 basement excavation Methods 0.000 claims description 3
- 238000010009 beating Methods 0.000 claims description 3
- 238000007689 inspection Methods 0.000 claims description 3
- 238000005086 pumping Methods 0.000 claims description 3
- 230000007423 decrease Effects 0.000 claims description 2
- 238000003780 insertion Methods 0.000 claims description 2
- 230000037431 insertion Effects 0.000 claims description 2
- 239000011148 porous material Substances 0.000 abstract description 11
- 239000010410 layer Substances 0.000 description 9
- 238000013517 stratification Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 230000002093 peripheral effect Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000011229 interlayer Substances 0.000 description 4
- 230000002411 adverse Effects 0.000 description 3
- 230000015271 coagulation Effects 0.000 description 3
- 238000005345 coagulation Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000005056 compaction Methods 0.000 description 2
- 238000012937 correction Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 210000003195 fascia Anatomy 0.000 description 2
- 230000000505 pernicious effect Effects 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000001727 in vivo Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
- E02D5/38—Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds
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- General Engineering & Computer Science (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention relates to the technical field of constructional engineering, in particular to a deep pile casing mechanical pore-forming pile-forming construction process, which sequentially protects the following steps: step one, pile position lofting: determining the position of a foundation pile on a construction site according to a design position; step two, pile casing construction: selecting a steel pile casing with the inner diameter larger than the designed diameter of the foundation pile, and performing vibration sinking on the pile casing to enable the pile casing to be inserted into the soil body at the position of the foundation pile, wherein the pile casing and the designed position of the foundation pile are coaxially arranged; step three, pore forming: excavating or drilling the soil body in the pile casing to the designed depth of the foundation pile; step four, hoisting the reinforcement cage: hoisting a reinforcement cage of the foundation pile into the pile casing; step five, pouring concrete: and pouring concrete in the pile casing to form a foundation pile. The construction process for mechanically forming the hole and the pile by the deep pile casing not only improves the hole forming efficiency, but also reduces the safety risk caused by soil body collapse, and greatly improves the structural strength and the rigidity of the foundation pile.
Description
Technical field
The present invention relates to construction engineering technical fields, and in particular to a kind of depth casing mechanical hole building bore forming technique.
Background technique
In construction engineering technical field, the mode of drill-pouring concrete pile is widely used in construction foundation working
In, currently, usually first drilling in Pile integrity position, then drilling again for drill-pouring concrete bore forming
The interior pouring construction for carrying out concrete, filling concrete construction forms foundation pile after completing maintenance hardening, although above-mentioned mode
It is widely used in current foundation pile construction, but still there is also deficiency, it is specific as follows to state:
In actual borehole construction, current mode is directly to carry out drilling construction in design position by drilling machine, when construction position
When being set to geology interlayer, solution cavity geological stratification or backfill soil layer, the usual sandstone ratio of these soil layers is higher, but also lacks
Cohesive soil, it is difficult to store moisture, cause these soil layer matter are loose easily to collapse, collapse hole usually occur during drilling and forming hole
Situation can also cause the aperture periphery soil body large area of drilling to collapse when serious, to the construction equipment around drilling, especially apply
Worker person brings considerable risk, occur existing stake machine topple, the serious accidents such as casualties.
There is collapse hole risk so needing to design one kind at present and can reduce in pore forming process, improves working security
Pore-forming construction technology.
Summary of the invention
It is an object of the invention to: it is directed in current foundation pile construction, for geology interlayer, solution cavity geological stratification or backfill
The pernicious thing such as easily occurs collapse hole in boring procedure, or even casualties occurs in the loose construction site of this kind of soil layer of matter layer
Therefore deficiency, one kind be provided and can reduce in pore forming process there is collapse hole risk, improve the pore-forming construction of working security
Technique.
In order to achieve the above-mentioned object of the invention, the present invention provides following technical schemes:
A kind of depth casing mechanical hole building bore forming technique, successively protects following step:
Step 1: the setting-out of stake position: determining foundation pile position according to design position on construction ground；
Step 2: casing is constructed: selecting internal diameter to be greater than the steel pile casting of Pile integrity diameter, carry out protecting the steel at the construction field (site)
Cylinder is cut and/or is welded integral casing, is then carried out vibration to casing and is sunk, and is made in the casing insertion foundation pile position soil body,
The design position of the casing and the foundation pile is coaxially arranged；
Step 3: pore-forming: the soil body in casing being excavated or drilled to Pile integrity depth；
Step 4: reinforcing bar cage hoisting: will be in the reinforcing bar cage hoisting to casing of foundation pile；
Step 5: concreting: casting concrete forms foundation pile in casing.
The deep casing mechanical hole building bore forming technique of the application, before excavating pore-forming, first in Pile integrity position
The heavy steel pile casting of periphery vibration, the internal diameter of steel pile casting are greater than foundation pile diameter, then the soil body in steel pile casting are excavated or bored again
Hole forms the concrete pouring hole of foundation pile, in this manner, due to the support of casing, directly avoids native in pore forming process
The risk that body collapses；Moreover, the setting of steel pile casting, also reduces influence of the pore forming process to the peripheral soil body, so also reducing
The risk of peripheral Study on Soil Collapse, so not only increase pore-forming efficiency using the construction technology of the application, and also reduce because
Security risk caused by Study on Soil Collapse, greatly improved working security；On the other hand, by the way of the application, institute's shape
At foundation pile diameter be greater than the design diameter of foundation pile, so, also improve the structural strength and rigidity of foundation pile, moreover, because
It is to be formed by foundation pile using steel pile casting and be substantially concrete filled steel tube, in this way, the knot of foundation pile also further greatly improved
Structure strength and stiffness, and significantly improve the reliability and service life of foundation pile；Another further aspect is for extremely evacuating
Geological conditions, due to the support of casing, will not influence in a short time even if still there is the hole phenomenon that collapses in the drilling soil body
The soil body on aperture side on ground leaves time enough to drilling machine and withdrawing for personnel, avoids a machine from toppling, casualties etc.
The generation of serious accident.
As a preferred technical solution, in the step 2, before the heavy casing that shakes, first in the foundation pile position that step 1 determines
It sets drill using drilling machine and forms prebored hole, the prebored hole is matched with the outer wall of the casing, when shaking heavy casing, first
Casing is sling vertically, is located at casing lower end in prebored hole, then shake heavy casing again.By the way that prebored hole is first arranged, on the one hand
It is the positioning for facilitating casing, it is ensured that the position precision of casing, on the other hand, the support due to prebored hole to casing makes casing
It can reliably keep vertical, so, also reduce the risk of the heavy hour offset of casing vibration.
The internal diameter of shown casing is D as a preferred technical solution, and shown Pile integrity diameter is d, D-d >=200mm.
As a preferred technical solution, in the step 2, after the casing vibration sinks to position, the upper end of the casing is super
Ground 260mm~400mm out.Casing is above the ground level, it is ensured that casing to the excellent support of the ground hole mouth periphery soil body, meanwhile,
Since during filling concrete, easily there is the adverse effect such as laitance in top, and using the scheme of the application, laitance is this kind of unfavorable
Influence is promoted at the top of casing, also being capable of the good quality for guaranteeing foundation pile, so further raising after the later period cuts
The quality of concreting of foundation pile.
As a preferred technical solution, in the step 2, casing is hung at prebored hole using truck crane, in casing
Mandrel line and Pile integrity central axis deviation≤20mm, shake to casing using the manipulator clamping casing upper end of hammering and pulling-out machine
It is heavy, during vibration is heavy, verticality inspection is carried out to casing using theodolite or total station, when casing tilts, is led to
The position of toning whole manipulator folder casing adjusts the sinking verticality of casing, and is repeatedly lifted up and sinking casing, until casing
Verticality composite demand.In the scheme of the application, by the manipulator clamping casing top of hammering and pulling-out machine, then shake
Heavy, when the verticality composite demand of casing, manipulator clamping is in the symmetrical two sides of casing, casing guarantor when being raised and sinking
Vertical state is held, when casing tilts, the clip position of manipulator is adjusted, makes manipulator clamping in the non-right of casing upper end
Claim side, tilt casing towards direction when lifting and sinking, so rectify a deviation, up to casing restore to it is vertical when, then adjust
Manipulator clamping position shake heavy construction, using it is this lift and sink repeatedly by the way of carry out the correction of casing, not only
It ensures the verticality requirement of casing, moreover, in this process, surrounding soil also repeatedly carries out shock and vibration, improves
The compaction rate of casing surrounding soil, so also further improving surrounding soil to the support reliability of casing, Jin Erye
Improve the application foundation pile structural behaviour and stability in use.
As a preferred technical solution, in the step 2, after casing vibration sinks to design position, by beating for hammering and pulling-out machine
It pulls out strength reduction to former beat and pulls out the 20~30% of intensity, casing is persistently beaten and is pulled out, until casing no longer subsidence velocity no longer increases
It adds as stopping.
When the geological stratification of Pile integrity position is geology interlayer, solution cavity geological stratification or backfill this kind of loose geology of soil layer
When layer, after casing vibration sinks to position, the soil body below casing lower end may be still the loose soil body or there are larger gap, institutes
With, in the scheme of the application, casing it is sincere in place after, reduction, which is beaten, pulls out intensity and continues dozen to pull out, and being on the one hand can be into one
The loose situation of the soil body below the assessment casing lower end of step, on the other hand, when casing subsidence velocity is not further added by, it is ensured that shield
Cylinder bottom soil body to the vertical supporting stability and reliability of casing, which is not further added by refer to that reduction beats and pulls out intensity after
The comparison of casing subsidence velocity；It is pulled out in another aspect, reducing and beating to pull out intensity and continue to beat to casing, it is also further all to casing
It encloses and carries out again and vibrate with the lower section soil body, also further improve surrounding soil to the support reliability of casing, Jin Erye
The application foundation pile structural behaviour and stability in use are improved, is reduced in subsequent drilling construction, because drilling construction is to the soil body
It impacts and causes casing sinking or inclined risk, in this way, also further improving and applying while improving pore-forming efficiency
The safety of work.
As a preferred technical solution, in the step 3, using the rotary drilling rig of preparation hosqe bit in casing
The soil body excavated, outer diameter and the Pile integrity diameter of hosqe bit match.In the actual engineering construction, part foundation pile because
Design position is the non-loose soil body, so do not need setting casing, so, in the scheme of the application, using having and base
The hosqe bit that stake design diameter matches, the corresponding stake holes for being not provided with casing is still practical, so improves the general of drilling machine
Property, construction is facilitated, construction cost is also saved.
As a preferred technical solution, in the step 3, in excavation to Pile integrity depth, hosqe bit is adjusted
Position is bonded hosqe bit with the casing inner wall, is repeatedly lifted up and declines hosqe bit, by the soil on the casing inner wall
Body all scrapes, and is then again dug out the soil body of stake holes bottom using hosqe bit.Using the scheme of the application, bored using cartridge type
Head is by the soil body hanging fascia on casing inner wall, in this way, greatly improving the being tightly combined property between foundation pile concrete and casing, formation can
On the other hand the concrete filled steel tube leaned on also reduces in concrete and is mixed into a large amount of soil properties and reduces foundation pile concreting matter
The risk of amount, in this way, also further improving the architecture quality of foundation pile.
As a preferred technical solution, in the step 4, the reinforcing bar cage hoisting in place after, using hangs muscle to steel
Muscle cage is suspended in midair, and steel reinforcement cage is made to be located at design position, in the step 5, when carrying out filling concrete, and steel reinforcement cage bottom
The rate of flooding of portion's lower concrete is less than the rate of flooding of concrete above steel reinforcement cage bottom.In the scheme of the application, first adopt
It is further added by filling concrete speed, is on the one hand kept away when concrete is more than steel reinforcement cage bottom with lower coagulation rate of flooding
Exempt from concrete to impact excessive to stake holes bottom soil body and a large amount of soil sandstones is caused to be mixed into concrete, causes broken pile, folder mud, folder
The unfavorable problem of the heart, on the other hand, also reducing leads to the risk of rising of steel cage because filling concrete flow velocity is excessive, such as
This, further ensures that the concrete pouring quality of foundation pile.
As a preferred technical solution, in the step 5, in filling concrete, when concreting pipe blocks up
Guan Shi will pour pipe and be detached from concrete pumping dress, is then lifted out proper height, so that the manipulator of hammering and pulling-out machine is clamped and pour
Then pipe pours pipe by the vibration of the manipulator of hammering and pulling-out machine, make to pour the concrete in pipe and flow out because of thixotropy principle and pour
Build pipe.In application scheme, vibration dredging is carried out to concrete gate spool by existing hammering and pulling-out machine, significantly reduces coagulation
The dredging difficulty of native gate spool while reducing worker's working strength, also improves the dredging efficiency of concrete gate spool.
As a preferred technical solution, when plugging occurs in concreting pipe, pipe is poured by manipulator vibration, cannot be made
When concrete outflow pours pipe, concrete gate spool is replaced, continues concreting, the concrete strength etc. that machinery pours
Grade is higher than first casting concrete strength grade, and smashes repeatedly in two concrete surface junctions slotting, is uniformly mixed it.Pass through this
The mode of sample avoids forming low intensive concrete sandwich in two concrete junctions, it is ensured that the structural strength of foundation pile.
The casing lower end exceeds the foundation pile lower end as a preferred technical solution,.Set super for the depth of casing
On the one hand the setting depth of foundation pile out is to improve the structural stability of casing, and then improve foundation pile using longer casing
Structural strength and stability, on the other hand, casing lower end exceed the design position of foundation pile lower end, also improve in pore forming process,
Casing stability reduces in pore forming process, casing sinking risk.
Compared with prior art, beneficial effects of the present invention:
The deep casing mechanical hole building bore forming technique of the application, before excavating pore-forming, first in the periphery of Pile integrity position
Shake heavy steel pile casting, and the internal diameter of steel pile casting is greater than foundation pile diameter, shape that then soil body in steel pile casting is excavated or drilled again
At the concrete pouring hole of foundation pile, in this manner, due to the support of casing, directly avoids the soil body in pore forming process and collapse
The risk collapsed；Moreover, the setting of steel pile casting, also reduces influence of the pore forming process to the peripheral soil body, so also reducing periphery
The risk of Study on Soil Collapse, so not only increasing pore-forming efficiency, and also reduce because of the soil body using the construction technology of the application
Security risk caused by collapsing, greatly improved working security；On the other hand, it by the way of the application, is formed by
Foundation pile diameter is greater than the design diameter of foundation pile, so, the structural strength and rigidity of foundation pile are also improved, moreover, because being to adopt
It with steel pile casting, is formed by foundation pile and is substantially concrete filled steel tube, in this way, the structure that foundation pile also further greatly improved is strong
Degree and rigidity, and significantly improve the reliability and service life of foundation pile；Another further aspect is for the geology extremely evacuated
Condition, due to the support of casing, will not influence ground even if still there is the hole phenomenon that collapses in the drilling soil body in a short time
The soil body on upper aperture side leaves time enough to drilling machine and withdrawing for personnel, avoid a machine from toppling, casualties etc. it is pernicious
The generation of accident
Detailed description of the invention:
Fig. 1 is the step block diagram of deep casing mechanical hole building bore forming technique in embodiment；
Fig. 2 is the structural schematic diagram that hammering and pulling-out machine shakes when sinking casing in embodiment；
Fig. 3 is structural schematic diagram when rotary drilling rig excavates the soil body in casing in embodiment,
It is indicated in figure: 1- casing, 2- manipulator, 3- hammering and pulling-out machine, 4- drill bit, 5- rotary drilling rig.
Specific embodiment
Below with reference to test example and specific embodiment, the present invention is described in further detail, but should not understand this
It is all that this is belonged to based on the technology that the content of present invention is realized for the scope of the above subject matter of the present invention is limited to the following embodiments
The range of invention.
Embodiment 1, as illustrated in fig. 1 and 2,
A kind of depth casing mechanical hole building bore forming technique, successively protects following step:
Step 1: the setting-out of stake position: determining foundation pile position according to design position on construction ground；
Step 2: casing is constructed: selecting internal diameter to be greater than the steel pile casting 1 of Pile integrity diameter, carried out at the construction field (site) to the steel
Casing 1 is cut and/or is welded integral casing 1, is then carried out vibration to casing 1 and is sunk, and casing 1 is made to be inserted into foundation pile position soil
In vivo, the design position of the casing 1 and the foundation pile is coaxially arranged；
Step 3: pore-forming: the soil body in casing 1 being excavated or drilled to Pile integrity depth；
Step 4: reinforcing bar cage hoisting: will be in the reinforcing bar cage hoisting of foundation pile to casing 1；
Step 5: concreting: casting concrete forms foundation pile in casing 1.
The deep casing mechanical hole building bore forming technique of present embodiment, before excavating pore-forming, first in Pile integrity position
The heavy steel pile casting 1 of periphery vibration set, the internal diameter of steel pile casting 1 are greater than foundation pile diameter, then excavate again to the soil body in steel pile casting 1
Or drilling forms the concrete pouring hole of foundation pile and due to the support of casing 1, directly avoids pore-forming in this manner
The risk that the soil body collapses in the process；Moreover, the setting of steel pile casting 1, also reduces influence of the pore forming process to the peripheral soil body, so
The risk of peripheral Study on Soil Collapse is also reduced, so pore-forming efficiency is not only increased using the construction technology of present embodiment, and
And security risk caused by also reducing because of Study on Soil Collapse, working security greatly improved；On the other hand, using this implementation
The mode of mode is formed by the design diameter that foundation pile diameter is greater than foundation pile, so, also improve foundation pile structural strength and
Rigidity, moreover, because being to be formed by foundation pile using steel pile casting 1 and be substantially concrete filled steel tube, in this way, also further big
Width improves the structural strength and rigidity of foundation pile, and significantly improves the reliability and service life of foundation pile；Another side
The geological conditions extremely evacuated is faced, even if still there is the hole phenomenon that collapses in the drilling soil body, due to the support of casing 1, also not
The soil body that aperture side on ground can be influenced in a short time leaves time enough to drilling machine 5 and withdrawing for personnel, avoids
Stake machine topples, the generation of the serious accidents such as casualties.
As preferred embodiment, the internal diameter of shown casing 1 is D, and shown Pile integrity diameter is d, D-d >=200mm.
As preferred embodiment, in the step 2, before the heavy casing 1 that shakes, foundation pile first determining in step 1
Position carries out drilling using drilling machine 5 and forms prebored hole, and the prebored hole is matched with the outer wall of the casing 1, in the heavy casing 1 that shakes
When, casing 1 is sling vertically first, is located at 1 lower end of casing in prebored hole, then shake heavy casing 1 again.By the way that preboring is first arranged
On the one hand hole is the positioning for facilitating casing 1, it is ensured that the position precision of casing 1, on the other hand, since prebored hole is to casing 1
Support, enables casing 1 reliably to keep vertically, so, also reduce the risk of the heavy hour offset of the vibration of casing 1.
Embodiment 2, as shown in Figs. 1-3,
A kind of depth casing mechanical hole building bore forming technique, on the basis of the technical solution of embodiment 1, further, described
In step 2, after the vibration of casing 1 sinks to position, the upper end of the casing 1 exceeds ground 260mm~400mm.Casing 1 is above Ground
Face, it is ensured that casing 1 is to the excellent support of the ground hole mouth periphery soil body, simultaneously as top is easy during filling concrete
There is the adverse effect such as laitance, using the scheme of present embodiment, this kind of adverse effect of laitance is promoted to 1 top of casing,
Later period is also capable of the good quality for guaranteeing foundation pile after cutting, the so further quality of concreting for improving foundation pile.
As a preferred technical solution, in the step 2, casing 1 is hung at prebored hole using truck crane, casing 1
Central axis and Pile integrity central axis deviation≤20mm clamp 1 upper end of casing to casing 1 using the manipulator 2 of hammering and pulling-out machine 3
It is heavy to carry out vibration, during vibration is heavy, verticality inspection is carried out to casing 1 using theodolite or total station, when casing 1 inclines
When oblique, the position for pressing from both sides casing 1 by adjusting manipulator 2 adjusts the sinking verticality of casing 1, and is repeatedly lifted up and sinking casing
1, until the verticality composite demand of casing 1.In the scheme of present embodiment, casing is clamped by the manipulator 2 of hammering and pulling-out machine 3
Then 1 top carries out vibration and sinks, when the verticality composite demand of casing 1, manipulator 2 is clamped in the symmetrical two sides of casing 1, shield
Cylinder 1 keeps vertical state when being raised and sinking, and when casing 1 tilts, adjusts the clip position of manipulator 2, makes machine
Tool hand 2 is clamped in the asymmetric side of 1 upper end of casing, tilts casing 1 towards direction when lifting and sinking, so rectifies a deviation,
Until casing 1 restore to it is vertical when, then adjust 2 clip position of manipulator and shake heavy construction, using it is this lift repeatedly and under
Heavy mode carries out the correction of casing 1, not only ensures the verticality requirement of casing 1, moreover, in this process, also repeatedly
Surrounding soil carry out shock and vibration, the compaction rate of 1 surrounding soil of casing is improved, so also further improving week
The soil body is enclosed to the support reliability of casing 1, and then also improves present embodiment foundation pile structural behaviour and stability in use.
Embodiment 3, as shown in Figs. 1-3,
A kind of depth casing mechanical hole building bore forming technique, on the basis of the technical solution of embodiment 1 or 2, further, in institute
State in step 2, after the vibration of casing 1 sinks to design position, by hammering and pulling-out machine 3 beat pull out strength reduction to it is former beat pull out intensity 20~
30%, casing 1 is persistently beaten and is pulled out, until no longer subsidence velocity is not further added by casing 1.
When the geological stratification of Pile integrity position is geology interlayer, solution cavity geological stratification or backfill this kind of loose geology of soil layer
When layer, after the vibration of casing 1 sinks to position, the soil body below 1 lower end of casing may be still the loose soil body or there are larger gap, institutes
With, in the scheme of present embodiment, casing 1 it is sincere in place after, reduction, which is beaten, pulls out intensity and continues dozen to pull out, and being on the one hand can be with
The loose situation of the soil body below further assessment 1 lower end of casing, on the other hand, when 1 subsidence velocity of casing is not further added by, really
1 bottom soil body of casing is protected to the vertical supporting stability and reliability of casing 1, which, which is not further added by, refers to that reduction is beaten
Pull out the comparison of 1 subsidence velocity of casing after intensity；It pulls out intensity in another aspect, reducing to beat casing 1 is continued dozen to pull out, also further
The soil body around and under casing 1 is carried out again and vibration, also further improving surrounding soil can to the support of casing 1
By property, and then present embodiment foundation pile structural behaviour and stability in use are also improved, reduced in subsequent drilling construction, because
Drilling construction impacts the soil body and causes the sinking of casing 1 or inclined risk, in this way, while improving pore-forming efficiency,
Further improve the safety of construction.
Embodiment 4, as shown in Figs. 1-3,
A kind of depth casing mechanical hole building bore forming technique, on the basis of any one technical solution of embodiment 1-3, further
, in the step 3, the soil body in casing 1 is excavated using the rotary drilling rig 5 for preparing hosqe bit 4, cartridge type is bored
First 4 outer diameter matches with Pile integrity diameter.In the actual engineering construction, part foundation pile because design position be non-loose soil
Body, thus do not need setting casing 1, so, in the scheme of present embodiment, using have and Pile integrity diameter phase
The hosqe bit 4 matched, the corresponding stake holes for being not provided with casing 1 is still practical, so improves the versatility of drilling machine 5, facilitates and apply
Work also saves construction cost.
As preferred embodiment, in the step 3, in excavation to Pile integrity depth, hosqe bit is adjusted
4 positions are bonded hosqe bit 4 with 1 inner wall of casing, are repeatedly lifted up and decline hosqe bit 4, by 1 inner wall of casing
On the soil body all scrape, then the soil body of stake holes bottom is dug out using hosqe bit 4 again.Using the side of present embodiment
Case, using hosqe bit 4 by the soil body hanging fascia on 1 inner wall of casing, in this way, greatly improving between foundation pile concrete and casing 1
Being tightly combined property, forms reliable concrete filled steel tube, on the other hand also reduces and is mixed into a large amount of soil properties in concrete and drops
The risk of low foundation pile concrete pouring quality, in this way, also further improving the architecture quality of foundation pile.
Embodiment 5, as shown in Figs. 1-3,
A kind of depth casing mechanical hole building bore forming technique, on the basis of any one technical solution of embodiment 1-4, further
, in the step 4, the reinforcing bar cage hoisting in place after, steel reinforcement cage is suspended in midair using hangs muscle, makes steel reinforcement cage position
In design position, in the step 5, when carrying out filling concrete, the rate of flooding of steel reinforcement cage bottom part down concrete is small
The rate of flooding of concrete above steel reinforcement cage bottom.In the scheme of present embodiment, lower coagulation rate of flooding is first used,
When concrete is more than steel reinforcement cage bottom, it is further added by filling concrete speed, is on the one hand to avoid concrete to stake holes bottom soil
Body impact is excessive and a large amount of soil sandstones is caused to be mixed into concrete, causes broken pile, folder mud, sandwich unfavorable problem, another party
Face, also reducing leads to the risk of rising of steel cage because filling concrete flow velocity is excessive, in this way, further ensuring that the mixed of foundation pile
Solidifying soil pouring quality.
As preferred embodiment, in the step 5, in filling concrete, when concreting pipe blocks up
Guan Shi will pour pipe and be detached from concrete pumping dress, is then lifted out proper height, so that the manipulator 2 of hammering and pulling-out machine 3 is clamped and pour
Then pipe pours pipe by the vibration of manipulator 2 of hammering and pulling-out machine 3, makes to pour the concrete in pipe and flow out because of thixotropy principle
Pour pipe.In present embodiment scheme, vibration dredging is carried out to concrete gate spool by existing hammering and pulling-out machine 3, is substantially dropped
The low dredging difficulty of concrete gate spool while reducing worker's working strength, also improves the dredging effect of concrete gate spool
Rate.
As preferred embodiment, when plugging occurs in concreting pipe, pipe is poured by the vibration of manipulator 2, it cannot
When concrete outflow being made to pour pipe, concrete gate spool is replaced, continues concreting, the concrete strength that machinery pours
Grade is higher than first casting concrete strength grade, and smashes repeatedly in two concrete surface junctions slotting, is uniformly mixed it.Pass through
Such mode avoids forming low intensive concrete sandwich in two concrete junctions, it is ensured that the structural strength of foundation pile.
As preferred embodiment, 1 lower end of casing exceeds the foundation pile lower end.It sets the depth of casing 1 to
On the one hand setting depth beyond foundation pile is to improve the structural stability of casing 1 using longer casing 1, and then improve base
The structural strength and stability of stake, on the other hand, 1 lower end of casing exceed the design position of foundation pile lower end, also improve pore-forming mistake
Cheng Zhong, 1 stability of casing reduce in pore forming process, 1 sinking risk of casing.
Above embodiments are only to illustrate the present invention and not limit the technical scheme described by the invention, although this explanation
The present invention has been described in detail referring to above-mentioned each embodiment for book, but the present invention is not limited to above-mentioned specific implementation
Mode, therefore any couple of present invention modifies or equivalent replacement；And the technical side of all spirit and scope for not departing from invention
Case and its improvement, are encompassed by scope of the presently claimed invention.
Claims (10)
1. a kind of depth casing mechanical hole building bore forming technique, it is characterised in that: successively protect following step:
Step 1: the setting-out of stake position: determining foundation pile position according to design position on construction ground；
Step 2: casing is constructed: selecting internal diameter to be greater than the steel pile casting of Pile integrity diameter, carry out protecting the steel at the construction field (site)
Cylinder is cut and/or is welded integral casing, is then carried out vibration to casing and is sunk, and is made in the casing insertion foundation pile position soil body,
The design position of the casing and the foundation pile is coaxially arranged；
Step 3: pore-forming: the soil body in casing being excavated or drilled to Pile integrity depth；
Step 4: reinforcing bar cage hoisting: will be in the reinforcing bar cage hoisting to casing of foundation pile；
Step 5: concreting: casting concrete forms foundation pile in casing.
2. depth casing mechanical hole building bore forming technique as described in claim 1, it is characterised in that: in the step 2,
Before the heavy casing that shakes, drilling is first carried out using drilling machine in the foundation pile position that step 1 determines and forms prebored hole, the prebored hole with
The outer wall of the casing matches, and when shaking heavy casing, first slings casing vertically, is located at casing lower end in prebored hole, so
Shake heavy casing again afterwards.
3. depth casing mechanical hole building bore forming technique as described in claim 1, it is characterised in that: in the step 2,
After the casing vibration sinks to position, the upper end of the casing exceeds ground 260mm~400mm.
4. depth casing mechanical hole building bore forming technique as claimed in any one of claims 1-3, it is characterised in that: described
In step 2, casing is hung at prebored hole using truck crane, casing central axis and Pile integrity central axis deviation≤
It is heavy to carry out vibration to casing using the manipulator clamping casing upper end of hammering and pulling-out machine by 20mm, during vibration is heavy, using theodolite or
Total station carries out verticality inspection to casing, when casing tilts, presss from both sides the position of casing by adjusting manipulator to adjust
The sinking verticality of casing, and be repeatedly lifted up and sinking casing, until the verticality composite demand of casing.
5. depth casing mechanical hole building bore forming technique as claimed in any one of claims 1-3, it is characterised in that: described
In step 2, after casing vibration sinks to design position, beating for hammering and pulling-out machine is pulled out strength reduction to former beat and pulls out the 20~30% of intensity,
Casing is persistently beaten and is pulled out, until no longer subsidence velocity is not further added by casing.
6. depth casing mechanical hole building bore forming technique as claimed in any one of claims 1-3, it is characterised in that: described
In step 3, the soil body in casing is excavated using the rotary drilling rig for preparing hosqe bit, the outer diameter and base of hosqe bit
Stake design diameter matches.
7. depth casing mechanical hole building bore forming technique as claimed in claim 6, it is characterised in that: in the step 3,
In excavation to Pile integrity depth, cartridge type bit location is adjusted, hosqe bit is bonded with the casing inner wall, is repeatedly lifted up
With decline hosqe bit, the soil body on the casing inner wall is all scraped, then uses hosqe bit by stake holes bottom again
The soil body is dug out.
8. depth casing mechanical hole building bore forming technique as claimed in any one of claims 1-3, it is characterised in that: described
In step 4, the reinforcing bar cage hoisting in place after, steel reinforcement cage is suspended in midair using hangs muscle, make steel reinforcement cage be located at design position
It sets, in the step 5, when carrying out filling concrete, the rate of flooding of steel reinforcement cage bottom part down concrete is less than steel reinforcement cage
The rate of flooding of concrete above bottom.
9. depth casing mechanical hole building bore forming technique as claimed in any one of claims 1-3, it is characterised in that: described
In step 5, in filling concrete, when plugging occurs in concreting pipe, pipe will be poured and be detached from concrete pumping dress, so
After promote proper height, so that the manipulator of hammering and pulling-out machine is clamped and pour pipe, then, poured by the vibration of the manipulator of hammering and pulling-out machine
Pipe, makes to pour the concrete in pipe and flows out because of thixotropy principle and pour pipe.
10. depth casing mechanical hole building bore forming technique as claimed in any one of claims 1-3, it is characterised in that: when mixed
Solidifying soil pours pipe and plugging occurs, pours pipe by manipulator vibration, and when concrete outflow cannot be made to pour pipe, replacement concrete is poured
Note pipe continues concreting, and the strength grade of concrete that machinery pours is higher than first casting concrete strength grade, and
Smash repeatedly in two concrete surface junctions it is slotting, make its be uniformly mixed.
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| CN201910368323.9A CN110016911A (en) | 2019-05-05 | 2019-05-05 | Construction process for mechanical pore-forming pile forming of deep pile casing |
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| CN115045262A (en) * | 2022-06-10 | 2022-09-13 | 中国建筑一局(集团)有限公司 | Construction method of karst landform high-fill foundation pile foundation |
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Application publication date: 20190716 |