CN109914455A - A kind of structure foundation cast-in-place pile construction method - Google Patents
A kind of structure foundation cast-in-place pile construction method Download PDFInfo
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- CN109914455A CN109914455A CN201910250427.XA CN201910250427A CN109914455A CN 109914455 A CN109914455 A CN 109914455A CN 201910250427 A CN201910250427 A CN 201910250427A CN 109914455 A CN109914455 A CN 109914455A
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Abstract
The invention discloses a kind of structure foundation cast-in-place pile construction methods, specifically according to following operating procedure: S1: preparation of construction；S2: mud is prepared；S3: drilling；S4: casing follow-up；S5: fixed steel bars cage；S6: concrete perfusion.The present invention in hole by supplementing mud in drilling, be conducive to carry out pressure compensation to the inner wall of drilling, reduce hole wall collapse trend, cooperate casing simultaneously, improve the stability of stake holes, prevent hole wall collapse from impacting to stake holes, in concrete perfusion, the perfusion of concrete and the taking-up of casing carry out simultaneously, the interior part for being detached from casing supported of stake holes is substituted using concrete, stake holes inner wall can be supported using concrete after casing extraction, during constantly pulling out cylinder, realize the gradually perfusion of concrete, prevent in filling process that there is a phenomenon where hole wall collapses, it can effectively ensure that filling pile construction efficiency and construction quality in soft soil horizon.
Description
Technical field
The invention belongs to technical field of building construction, and in particular to a kind of structure foundation cast-in-place pile construction method.
Background technique
Bored concrete pile is the directly aperture on designed stake position, and section is circle, and steel reinforcement cage is placed in hole after pore-forming,
Made of concrete perfusion.In filling pile construction, advanced drilling is needed, is influenced by geological conditions, in high water level soil
On layer and soft soil horizon when drilling, it is easy to happen stake holes inner wall and collapses and the phenomenon that stake holes deforms, not only increase drilling
Difficulty, influence construction speed, and influence the construction quality of bored concrete pile.
Summary of the invention
The purpose of the present invention is to provide a kind of structure foundation cast-in-place pile construction methods, to solve in above-mentioned background technique
The problem of proposition.
To achieve the above object, the invention provides the following technical scheme: a kind of structure foundation cast-in-place pile construction method, tool
Body is according to following operating procedure:
S1: preparation of construction, centered on boring point, the triple-length of stake holes radius is radius, excavates surface layer 60-80cm thickness
Soft soil horizon, and stake holes top casing is inserted at boring point, backfills 6% dirt outside casing later, compress compacting and with ground
Face flushes；
S2: preparing mud, and clay, bentonite, heavy weight additive, tackifier and sealing agent and water are mixed, retaining wall is prepared
Mud, it is spare；
S3: drilling machine is mounted on the pedestal in backfill by drilling, and drill bit and stake holes centre deviation is made to be less than 5cm, works as brill
When hole depth is greater than 1m, slurry coat method is pumped into hole in time；
S4: single-unit casing with the increase of drilling depth, is cut into two identical semicolumn casings, and again by casing follow-up
It is weldingly fixed on outside drill bit drilling rod, later sinks to casing in drilling, and expose 0.5m height, using casing bracket to exposing
End is fixed, when casing lower end drilling depth be greater than single-unit casing length when, with expose top casing on weld one again
Root casing, and sink in drilling and move in circles again, until drilling depth reaches projected depth；
S5: fixed steel bars cage is removed residue in stake holes, then the steel reinforcement cage being welded is fixed in stake holes, steel reinforcement cage and stake
Deviation is less than 1% between the axle center of hole；
S6: concrete perfusion carries out rapping to casing using vibration excitor, casing is extracted and cut off paragraph by paragraph, while will be prefabricated mixed
Solidifying soil injects the least significant end of stake holes by pipeline, and is vibrated using vibrator, until completing coagulation when extracting whole casings
Soil perfusion.
Preferably, stake holes top casing diameter is greater than bore diameter 5-10cm in step S1.
Preferably, each substance is calculated by weight as in step S2: 16-24 parts of clay, 30-48 parts of bentonite, heavy weight additive
10-14 parts of 5-8 parts, 4-10 parts of mud tackifier and sealing agent, 100-128 parts of water.
Preferably, casing diameter is less than bore diameter 3-5cm in step S4, and single-unit casing length is 2m, works as bottom
A casing length gauge is pressed when casing is apart from less than one single-unit casing length of bottom hole, and stake holes bottom is inserted into extra casing bottom end
Hold 10-20cm.
Preferably, step S4 casing gradient is less than 2%.
Preferably, the every vibration 5-10s of vibration excitor in step S6 carries out a tube drawing and operates, single tube drawing length 0.5-1m,
Pipe-pulling speed 0.6-1.0m/min.
Preferably, filling concrete speed is identical as pipe-pulling speed in step S6.
Technical effect and advantage of the invention:
The present invention is conducive to carry out pressure compensation to the inner wall of drilling, reduces hole wall by supplementing mud in hole in drilling
Collapsing trend, while cooperating casing, the stability of stake holes is improved, prevents hole wall collapse from impacting to stake holes, in perfusion coagulation
When native, the perfusion of concrete and the taking-up of casing carry out simultaneously, the interior part for being detached from casing supported of stake holes are utilized mixed
Solidifying soil is substituted, and can be supported using concrete to stake holes inner wall after casing extraction, during constantly pulling out cylinder,
The gradually perfusion for realizing concrete, prevents in filling process that there is a phenomenon where hole wall collapses, can effectively ensure that in mollisol
Filling pile construction efficiency and construction quality in layer.
Specific embodiment
Below in conjunction with the embodiment of the present invention, technical scheme in the embodiment of the invention is clearly and completely described,
Obviously, described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Based in the present invention
Embodiment, every other embodiment obtained by those of ordinary skill in the art without making creative efforts, all
Belong to the scope of protection of the invention.
Embodiment 1
The invention provides the following technical scheme: a kind of structure foundation cast-in-place pile construction method, specifically according to following operating procedure:
S1: preparation of construction, centered on boring point, the triple-length of stake holes radius is radius, excavates the pine of surface layer 60cm thickness
Soft Soil Layer, and stake holes top casing is inserted at boring point, 6% dirt is backfilled outside casing later, compresses compacting and and ground
It flushes；
S2: preparing mud, and clay, bentonite, heavy weight additive, tackifier and sealing agent and water are mixed, retaining wall is prepared
Mud, it is spare；
S3: drilling machine is mounted on the pedestal in backfill by drilling, and drill bit and stake holes centre deviation is made to be less than 5cm, works as brill
When hole depth is greater than 1m, slurry coat method is pumped into hole in time；
S4: single-unit casing with the increase of drilling depth, is cut into two identical semicolumn casings, and again by casing follow-up
It is weldingly fixed on outside drill bit drilling rod, later sinks to casing in drilling, and expose 0.5m height, using casing bracket to exposing
End is fixed, when casing lower end drilling depth be greater than single-unit casing length when, with expose top casing on weld one again
Root casing, and sink in drilling and move in circles again, until drilling depth reaches projected depth；
S5: fixed steel bars cage is removed residue in stake holes, then the steel reinforcement cage being welded is fixed in stake holes, steel reinforcement cage and stake
Deviation is less than 1% between the axle center of hole；
S6: concrete perfusion carries out rapping to casing using vibration excitor, casing is extracted and cut off paragraph by paragraph, while will be prefabricated mixed
Solidifying soil injects the least significant end of stake holes by pipeline, and is vibrated using vibrator, until completing coagulation when extracting whole casings
Soil perfusion.
Stake holes top casing diameter is greater than bore diameter 5cm in step S1.
Each substance is calculated by weight as in step S2: 16 parts of clay, 30 parts of bentonite, 5 parts of heavy weight additive, mud tackifier
4 parts and 10 parts of sealing agent, 100 parts of water.
Casing diameter is less than bore diameter 3cm in step S4, and single-unit casing length is 2m, when bottom casing is apart from hole
A casing length gauge is pressed when less than the one single-unit casing length in bottom, and stake holes bottom end 10cm is inserted into extra casing bottom end.
Step S4 casing gradient is less than 2%.
The every vibration 5s of vibration excitor in step S6 carries out a tube drawing operation, single tube drawing length 0.5m, pipe-pulling speed
0.6m/min。
Filling concrete speed is identical as pipe-pulling speed in step S6.
Embodiment 2
The invention provides the following technical scheme: a kind of structure foundation cast-in-place pile construction method, specifically according to following operating procedure:
S1: preparation of construction, centered on boring point, the triple-length of stake holes radius is radius, excavates the pine of surface layer 70cm thickness
Soft Soil Layer, and stake holes top casing is inserted at boring point, 6% dirt is backfilled outside casing later, compresses compacting and and ground
It flushes；
S2: preparing mud, and clay, bentonite, heavy weight additive, tackifier and sealing agent and water are mixed, retaining wall is prepared
Mud, it is spare；
S3: drilling machine is mounted on the pedestal in backfill by drilling, and drill bit and stake holes centre deviation is made to be less than 5cm, works as brill
When hole depth is greater than 1m, slurry coat method is pumped into hole in time；
S4: single-unit casing with the increase of drilling depth, is cut into two identical semicolumn casings, and again by casing follow-up
It is weldingly fixed on outside drill bit drilling rod, later sinks to casing in drilling, and expose 0.5m height, using casing bracket to exposing
End is fixed, when casing lower end drilling depth be greater than single-unit casing length when, with expose top casing on weld one again
Root casing, and sink in drilling and move in circles again, until drilling depth reaches projected depth；
S5: fixed steel bars cage is removed residue in stake holes, then the steel reinforcement cage being welded is fixed in stake holes, steel reinforcement cage and stake
Deviation is less than 1% between the axle center of hole；
S6: concrete perfusion carries out rapping to casing using vibration excitor, casing is extracted and cut off paragraph by paragraph, while will be prefabricated mixed
Solidifying soil injects the least significant end of stake holes by pipeline, and is vibrated using vibrator, until completing coagulation when extracting whole casings
Soil perfusion.
Stake holes top casing diameter is greater than bore diameter 8cm in step S1.
Each substance is calculated by weight as in step S2: 20 parts of clay, 40 parts of bentonite, 7 parts of heavy weight additive, mud tackifier
7 parts and 12 parts of sealing agent, 114 parts of water.
Casing diameter is less than bore diameter 4cm in step S4, and single-unit casing length is 2m, when bottom casing is apart from hole
A casing length gauge is pressed when less than the one single-unit casing length in bottom, and stake holes bottom end 15cm is inserted into extra casing bottom end.
Step S4 casing gradient is less than 2%.
The every vibration 8s of vibration excitor in step S6 carries out a tube drawing operation, single tube drawing length 0.8m, pipe-pulling speed
0.8m/min。
Filling concrete speed is identical as pipe-pulling speed in step S6.
Embodiment 3
The invention provides the following technical scheme: a kind of structure foundation cast-in-place pile construction method, specifically according to following operating procedure:
S1: preparation of construction, centered on boring point, the triple-length of stake holes radius is radius, excavates surface layer 60-80cm thickness
Soft soil horizon, and stake holes top casing is inserted at boring point, backfills 6% dirt outside casing later, compress compacting and with ground
Face flushes；
S2: preparing mud, and clay, bentonite, heavy weight additive, tackifier and sealing agent and water are mixed, retaining wall is prepared
Mud, it is spare；
S3: drilling machine is mounted on the pedestal in backfill by drilling, and drill bit and stake holes centre deviation is made to be less than 5cm, works as brill
When hole depth is greater than 1m, slurry coat method is pumped into hole in time；
S4: single-unit casing with the increase of drilling depth, is cut into two identical semicolumn casings, and again by casing follow-up
It is weldingly fixed on outside drill bit drilling rod, later sinks to casing in drilling, and expose 0.5m height, using casing bracket to exposing
End is fixed, when casing lower end drilling depth be greater than single-unit casing length when, with expose top casing on weld one again
Root casing, and sink in drilling and move in circles again, until drilling depth reaches projected depth；
S5: fixed steel bars cage is removed residue in stake holes, then the steel reinforcement cage being welded is fixed in stake holes, steel reinforcement cage and stake
Deviation is less than 1% between the axle center of hole；
S6: concrete perfusion carries out rapping to casing using vibration excitor, casing is extracted and cut off paragraph by paragraph, while will be prefabricated mixed
Solidifying soil injects the least significant end of stake holes by pipeline, and is vibrated using vibrator, until completing coagulation when extracting whole casings
Soil perfusion.
Stake holes top casing diameter is greater than bore diameter 10cm in step S1.
Each substance is calculated by weight as in step S2: 24 parts of clay, 48 parts of bentonite, 8 parts of heavy weight additive, mud tackifier
10 parts and 14 parts of sealing agent, 128 parts of water.
Casing diameter is less than bore diameter 5cm in step S4, and single-unit casing length is 2m, when bottom casing is apart from hole
A casing length gauge is pressed when less than the one single-unit casing length in bottom, and stake holes bottom end 20cm is inserted into extra casing bottom end.
Step S4 casing gradient is less than 2%.
The every vibration 10s of vibration excitor in step S6 carries out a tube drawing operation, single tube drawing length 1m, pipe-pulling speed 1.0m/
min。
Filling concrete speed is identical as pipe-pulling speed in step S6.
The present invention is conducive to carry out pressure compensation to the inner wall of drilling, reduce by supplementing mud in hole in drilling
Hole wall collapse trend, while cooperating casing, the stability of stake holes is improved, prevents hole wall collapse from impacting to stake holes, is being perfused
When concrete, the perfusion of concrete and the taking-up of casing carry out simultaneously, enable the interior part for being detached from casing supported of stake holes sharp
Substituted with concrete, stake holes inner wall can be supported using concrete after casing extraction, constantly pull out a mistake
Cheng Zhong realizes the gradually perfusion of concrete, prevents in filling process that there is a phenomenon where hole wall collapses, can effectively ensure that in pine
Filling pile construction efficiency and construction quality in Soft Soil Layer.
Finally, it should be noted that the foregoing is only a preferred embodiment of the present invention, it is not intended to restrict the invention,
Although the present invention is described in detail referring to the foregoing embodiments, for those skilled in the art, still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features,
All within the spirits and principles of the present invention, any modification, equivalent replacement, improvement and so on should be included in of the invention
Within protection scope.
Claims (7)
1. a kind of structure foundation cast-in-place pile construction method, it is characterised in that: specifically according to following operating procedure:
S1: preparation of construction, centered on boring point, the triple-length of stake holes radius is radius, excavates surface layer 60-80cm thickness
Soft soil horizon, and stake holes top casing is inserted at boring point, backfills 6% dirt outside casing later, compress compacting and with ground
Face flushes；
S2: preparing mud, and clay, bentonite, heavy weight additive, tackifier and sealing agent and water are mixed, retaining wall is prepared
Mud, it is spare；
S3: drilling machine is mounted on the pedestal in backfill by drilling, and drill bit and stake holes centre deviation is made to be less than 5cm, works as brill
When hole depth is greater than 1m, slurry coat method is pumped into hole in time；
S4: single-unit casing with the increase of drilling depth, is cut into two identical semicolumn casings, and again by casing follow-up
It is weldingly fixed on outside drill bit drilling rod, later sinks to casing in drilling, and expose 0.5m height, using casing bracket to exposing
End is fixed, when casing lower end drilling depth be greater than single-unit casing length when, with expose top casing on weld one again
Root casing, and sink in drilling and move in circles again, until drilling depth reaches projected depth；
S5: fixed steel bars cage is removed residue in stake holes, then the steel reinforcement cage being welded is fixed in stake holes, steel reinforcement cage and stake
Deviation is less than 1% between the axle center of hole；
S6: concrete perfusion carries out rapping to casing using vibration excitor, casing is extracted and cut off paragraph by paragraph, while will be prefabricated mixed
Solidifying soil injects the least significant end of stake holes by pipeline, and is vibrated using vibrator, until completing coagulation when extracting whole casings
Soil perfusion.
2. a kind of structure foundation cast-in-place pile construction method according to claim 1, it is characterised in that: stake holes in step S1
Top casing diameter is greater than bore diameter 5-10cm.
3. a kind of structure foundation cast-in-place pile construction method according to claim 1, it is characterised in that: each object in step S2
Matter is calculated by weight as: 16-24 parts of clay, 30-48 parts of bentonite, 5-8 parts of heavy weight additive, 4-10 parts of mud tackifier and leak stopping
10-14 parts of agent, 100-128 parts of water.
4. a kind of structure foundation cast-in-place pile construction method according to claim 1, it is characterised in that: casing in step S4
Diameter is less than bore diameter 3-5cm, and single-unit casing length is 2m, when bottom casing is apart from less than one single-unit casing of bottom hole
A casing length gauge is pressed when length, and stake holes bottom end 10-20cm is inserted into extra casing bottom end.
5. a kind of structure foundation cast-in-place pile construction method according to claim 1, it is characterised in that: step S4 casing inclines
Gradient is less than 2%.
6. a kind of structure foundation cast-in-place pile construction method according to claim 1, it is characterised in that: exciting in step S6
The every vibration 5-10s of device carries out a tube drawing operation, single tube drawing length 0.5-1m, pipe-pulling speed 0.6-1.0m/min.
7. a kind of structure foundation cast-in-place pile construction method according to claim 1, it is characterised in that: coagulation in step S6
Native rate of flooding is identical as pipe-pulling speed.
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| CN201910250427.XA CN109914455A (en) | 2019-03-29 | 2019-03-29 | A kind of structure foundation cast-in-place pile construction method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110344764A (en) * | 2019-07-26 | 2019-10-18 | 范茂丰 | Base expanding and base expanding reperfusion pile mechanical piling device and its pile making method |
| CN110700241A (en) * | 2019-10-08 | 2020-01-17 | 上海建工一建集团有限公司 | Cast-in-situ bored pile and construction method thereof |
| CN113175011A (en) * | 2021-05-11 | 2021-07-27 | 南京长江都市建筑设计股份有限公司 | Pile testing method for cast-in-situ bored pile |
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Application publication date: 20190621 |