CN105908706B - The recovery method of bored concrete pile longitudinal reinforcement in a kind of foundation pit enclosure structure - Google Patents
The recovery method of bored concrete pile longitudinal reinforcement in a kind of foundation pit enclosure structure Download PDFInfo
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- CN105908706B CN105908706B CN201610293672.5A CN201610293672A CN105908706B CN 105908706 B CN105908706 B CN 105908706B CN 201610293672 A CN201610293672 A CN 201610293672A CN 105908706 B CN105908706 B CN 105908706B
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- longitudinal reinforcement
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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
- E02D5/223—Details of top sections of foundation piles
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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
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D9/00—Removing sheet piles bulkheads, piles, mould-pipes or other moulds or parts thereof
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- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
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- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The recovery method of bored concrete pile longitudinal reinforcement in a kind of foundation pit enclosure structure, comprise the following steps and 1) determine each component specification according to going along with sb. to guard him design drawing；2) connection of longitudinal reinforcement lower end spike-tooth and annulus pile crown；3) isolated tube and longitudinal reinforcement socket；4) isolated tube is connected with annulus pile crown；5) isolated tube top plug is filled out；6) stirrup is connected with isolated tube：7) bore stake holes, lay steel reinforcement cage, casting concrete, maintenance pile body；8) construction and maintenance of capping beam；9) longitudinal reinforcement tensioning and anchor；10) longitudinal reinforcement is reclaimed, process is as follows：After the completion of foundation ditch backfill, nut and levelling backing plate are removed, longitudinal steel reinforcing bar is reused by upward extract, and recovery is completed.The present invention realizes whole Reinforcement recovery in bored concrete pile, reduces cost, be easy to operate.
Description
Technical field
The present invention relates to the recovery of longitudinal reinforcement in foundation ditch bored concrete pile, the bored concrete pile suitable for building enclosure, category building
Technical field of construction.
Background technology
With the proposition of " 13 planning ", the energy consumption for how reducing building industry is already environmentally friendly, slow as social energy conservation
Solve the most important thing of energy crisis.In the campshed structural protective system of foundation ditch, bored concrete pile is using most common, because it has
, rigidity big, stability good, deformation small the features such as small to surrounding environment influence, and it is widely applied in bracing engineering.But
It is in foundation pit system, bored concrete pile is Disposable artifact, local mainly for the protection of the safety during basement construction
After the completion of the backfill of lower room, going along with sb. to guard him the bored concrete pile in being not will no longer play a role, and the reinforcing bar retained in bored concrete pile then causes
Great waste.Recovery method is that two presstressed reinforcing steels are used in pile body at present, and reinforcing bar base plate portion is connected by screw bolts.
The deficiency of existing method has：1) it is only capable of reclaiming presstressed reinforcing steel, whole Reinforcements can not be reclaimed；2) deformed bar is reclaimed
When, because reinforcing bar base plate portion is connected by screw bolts, and reinforcing bar is longer, it is difficult to reinforcing bar is screwed out from bolt hole, so as to cause steel
Muscle recovery is unsuccessful；3) no and capping beam forms vertical horizontal to coordination work system, it is difficult to plays prestressing force effect；4) elder generation is needed
Deformed bar could be reclaimed by abolishing capping beam, and difficulty is big, and cost is high, complex operation.
The content of the invention
In order to overcome bored concrete pile Reinforcement in existing foundation pit system can not reclaim or reclaim difficult, cost
The high, deficiency of complex operation, the present invention provide one kind and realize whole Reinforcement recovery in bored concrete pile, reduce cost, behaviour
Make the recovery method of bored concrete pile longitudinal reinforcement in convenient foundation pit enclosure structure.
The technical solution adopted for the present invention to solve the technical problems is：
The recovery method of bored concrete pile longitudinal reinforcement in a kind of foundation pit enclosure structure, realize the retracting device bag of the recovery method
Include levelling backing plate, nut, isolated tube and annulus pile crown, the top of the longitudinal reinforcement is in threaded rod, the bottom of the longitudinal reinforcement
End is in tooth-like structure, and the levelling backing plate is located on capping beam, and the levelling circle of backing plate one is provided with the longitudinal reinforcement
The through hole that portion passes through, the nut, which is fixed on, to be stretched out on the threaded rod of levelling backing plate upper end；The annulus pile crown is located at fender post
Lower section, the first circle of circular annular pile are provided with the internal bore groove for longitudinal reinforcement bottom grafting, and the tooth-like structure is plugged on
In the internal bore groove；The longitudinal reinforcement is enclosed in isolated tube, and the isolated tube upper end connects with the levelling backing plate, it is described every
Lower end from pipe connects with the annulus pile crown, and the recovery method comprises the following steps：
1) before fender post of constructing, according to the specification for going along with sb. to guard him design drawing and determining levelling backing plate and annulus pile crown, and
The top of longitudinal reinforcement and the specification of bottom；
2) connection of longitudinal reinforcement lower end spike-tooth and annulus pile crown；
3) isolated tube and longitudinal reinforcement socket, longitudinal reinforcement freely can be rotated and moved up and down in isolated tube；
4) isolated tube is connected with annulus pile crown；
5) isolated tube top plug is filled out；
6) stirrup is connected with isolated tube：Connected between stirrup and isolated tube using colligation, stirrup and lengthways main steel bar form steel
Muscle cage overall skeleton；
7) bore stake holes, lay steel reinforcement cage, casting concrete, maintenance pile body；
8) construction and maintenance of capping beam, longitudinal reinforcement and isolated tube pass through capping beam, and conserve capping beam；
9) longitudinal reinforcement tensioning and anchor：After capping beam reaches design strength, longitudinal reinforcement passes through wearing on levelling backing plate
Hole, tensioning and anchoring are carried out to longitudinal reinforcement with nut further according to design requirement so that fender post and capping beam can form vertical horizontal
To coordination work system；
10) longitudinal reinforcement is reclaimed, process is as follows：After the completion of foundation ditch backfill, nut and levelling backing plate, longitudinal reinforcement are removed
Reused by upward extract, recovery is completed.
Further, the tooth-like structure includes spike-tooth, and the internal bore groove includes slot and guide and limit groove, the slot
Positioned at the top of guide and limit groove, the internal diameter of the slot is bigger than the internal diameter of guide and limit groove, and the guide and limit groove inwall is opened
There are the guide groove inserted from top to bottom for the spike-tooth and the neck for spike-tooth positioning, the guide groove is arranged up and down in axial direction,
The neck is in horizontal arc, and the entrance of the neck communicates with guide groove.
In the step 2), longitudinal reinforcement is adjusted, makes spike-tooth face guide groove, then spike-tooth is inserted into the bottom of internal bore groove along guide groove
Portion, longitudinal reinforcement is turned clockwise into neck；
In the step 10), by longitudinal reinforcement rotate counterclockwise, reinforcing bar bottom spike-tooth completely disengages neck, not constrained
Longitudinal reinforcement reused by upward extract.
Further, the top of the joint of the neck and guide groove is provided with spacing for preventing that spike-tooth from skidding off from neck
Block；
In the step 2), longitudinal reinforcement enter neck after, then by longitudinal reinforcement pull up until spike-tooth just with card
Groove upper wall is bonded and fettered by limited block；
In the step 10), after removing nut and levelling backing plate, longitudinal reinforcement will fall automatically so that spike-tooth is from card
Groove upper wall drops to neck lower wall, then by longitudinal reinforcement rotate counterclockwise.
Further, in the step 4), isolated tube is inserted in the slot of annulus pile crown, inserted using epoxy resin sealing
Space between groove and isolated tube.
In the step 5), the upper end requirement of isolated tube is higher than capping beam 100mm, and in longitudinal reinforcement and isolated tube
Between gap filled out with soft filler plug.
The present invention technical concept be：Fender post and capping beam pass through annulus pile crown, longitudinal reinforcement, levelling backing plate and nut
It is linked to be a vertically and horizontally stress entirety.The upper top certain length scope of longitudinal reinforcement is processed into threaded rod, bottom certain length
Scope is processed into tooth-like structure.Annulus pile crown is hollow cylinder, is wherein set on the upside of cylindrical wall according to the number of steel bars of design
If there is individual corresponding interior slotted eye.Interior slotted eye is made up of slot, guide groove, neck, and guide groove mainly rises to the spike-tooth on longitudinal reinforcement
The effect of directional guide, neck is used to constrain spike-tooth, so that longitudinal reinforcement lower end links together with annulus pile crown.Isolated tube
Longitudinal reinforcement is passed through from top to bottom, it is cementing one using adhesives such as epoxy resin between its underpart and the slot of annulus pile crown
Rise.Longitudinal reinforcement is coupled by stirrup, increases lateral restriction, forms overall skeleton.
Not only meet the functional requirements such as intensity and deformation of the cast-in-situ bored pile in foundation ditch system, and with operation letter
Single, easy for construction, the advantages that cost is low, speed is fast, safe.
Beneficial effects of the present invention are mainly manifested in：(1) rate of recovery is high.When fender post works, Reinforcement is complete
Isolate entirely with concrete, after the completion for the treatment of foundation ditch backfill, whole Reinforcements can be departed from and be reclaimed from pile body.
(2) cost is low, and economic and social benefit is good.The device uses common materials, and materials are few, far below reclaimed longitudinal reinforcement valency
Value, and reduce consumption, social and economic benefits and good.(3) it is simple and easy, easy to operate.Capping beam need not be abolished in advance with regard to energy
Lengthways main steel bar is reclaimed, and reinforcing bar is fixed or reclaimed by rotating unconfined reinforcing bar can.(4) cooperative bearing system,
It is safe.By applying prestressing force, pile body and capping beam are formed and are reliably connected, and form vertical horizontal to coordination work system,
The degree of safety of retaining design is high.
Brief description of the drawings
Fig. 1 is the schematic diagram of the retracting device of bored concrete pile longitudinal reinforcement in foundation pit enclosure structure.
Fig. 2 is Fig. 1 overall profile.
Fig. 3 is the schematic diagram of annulus pile crown.
Fig. 4 is the top view of internal bore groove.
Fig. 5 is the profile of internal bore groove.
Fig. 6 is the schematic diagram of the tooth-like structure of longitudinal reinforcement bottom.
Fig. 7 is Fig. 6 longitudinal sectional view.
Fig. 8 is Fig. 7 transverse sectional view.
Fig. 9 is the connection diagram of longitudinal reinforcement bottom.
Figure 10 is the schematic diagram of levelling backing plate.
Figure 11 is the connection diagram on longitudinal reinforcement top.
Embodiment
The invention will be further described below in conjunction with the accompanying drawings.
1~Figure 11 of reference picture, the recovery method of bored concrete pile longitudinal reinforcement, realizes the recovery side in a kind of foundation pit enclosure structure
The retracting device of method includes levelling backing plate 6, nut 5, isolated tube 3 and annulus pile crown 1, and the foundation pit enclosure structure includes capping beam
7 and fender post 8, the capping beam 7 be located on fender post 8, the longitudinal reinforcement 2 passes through capping beam 7 and fender post from top to bottom
8, the top of the longitudinal reinforcement 2 is in threaded rod, and the bottom of the longitudinal reinforcement 2 is in tooth-like structure, levelling 6, the backing plate
In on the capping beam 7, the levelling backing plate 6 one encloses the through hole for being provided with and being passed through for the longitudinal reinforcement top, and the nut 5 is solid
It is scheduled on and stretches out on the threaded rod of the levelling upper end of backing plate 6；The annulus pile crown 1 is located at the lower section of fender post 8, the annulus pile crown 1 one
Circle is provided with the internal bore groove 9 for the bottom grafting of longitudinal reinforcement 2, and the tooth-like structure is plugged in the internal bore groove 9；It is described
Longitudinal reinforcement 2 is enclosed in isolated tube 3, and the upper end of isolated tube 3 connects with the levelling backing plate 6, the lower end of the isolated tube 3 with
The annulus pile crown 1 connects, and the recovery method comprises the following steps：
1) before fender post of constructing, according to the specification for going along with sb. to guard him design drawing and determining levelling backing plate and annulus pile crown, and
The top of longitudinal reinforcement and the specification of bottom；
2) connection of longitudinal reinforcement lower end spike-tooth and annulus pile crown；
3) isolated tube and longitudinal reinforcement socket, longitudinal reinforcement freely can be rotated and moved up and down in isolated tube；
4) isolated tube is connected with annulus pile crown；
5) isolated tube top plug is filled out；
6) stirrup is connected with isolated tube：Connected between stirrup and isolated tube using colligation, stirrup and lengthways main steel bar form steel
Muscle cage overall skeleton；
7) bore stake holes, lay steel reinforcement cage, casting concrete, maintenance pile body；
8) construction and maintenance of capping beam, longitudinal reinforcement and isolated tube pass through capping beam, and conserve capping beam；
9) longitudinal reinforcement tensioning and anchor：After capping beam reaches design strength, longitudinal reinforcement passes through wearing on levelling backing plate
Hole, tensioning and anchoring are carried out to longitudinal reinforcement with nut further according to design requirement so that fender post and capping beam can form vertical horizontal
To coordination work system；
10) longitudinal reinforcement is reclaimed, process is as follows：After the completion of foundation ditch backfill, nut and levelling backing plate, longitudinal reinforcement are removed
Reused by upward extract, recovery is completed.
Further, the tooth-like structure includes spike-tooth 14, and the internal bore groove includes slot 10 and guide and limit groove, described
Slot 10 is located at the top of guide and limit groove, and the internal diameter of the slot 10 is bigger than the internal diameter of guide and limit groove, the guide and limit
Groove inwall is provided with the guide groove 11 inserted from top to bottom for the spike-tooth and the neck 12 for spike-tooth positioning, and the guide groove 11 is in
Axially arrange up and down, the neck 12 is in horizontal arc, and the entrance of the neck 12 communicates with guide groove 11；
In the step 2), longitudinal reinforcement is adjusted, makes spike-tooth face guide groove, then spike-tooth is inserted into internal bore groove 9 along guide groove
Bottom, longitudinal reinforcement is turned clockwise into neck；
In the step 10), by longitudinal reinforcement rotate counterclockwise, reinforcing bar bottom ailhead completely disengages neck, not constrained
Longitudinal reinforcement reused by upward extract.
Further, the top of the neck 12 and the joint of guide groove 11, which is provided with, is used to prevent what spike-tooth from skidding off from neck
Limited block；
In the step 2), longitudinal reinforcement enter neck after, then by longitudinal reinforcement pull up until spike-tooth just with card
Groove upper wall is bonded and fettered by limited block；
In the step 10), after removing nut and levelling backing plate, longitudinal reinforcement will fall automatically so that spike-tooth is from card
Groove upper wall drops to neck lower wall, then by longitudinal reinforcement rotate counterclockwise.
The cutting depth of certain foundation ditch is 6.95m, using the cast-in-situ bored pile of mud off, stake a length of 14m, diameter 700mm,
Capping beam thickness 600mm, strength grade of concrete C25, stake number is 556.Cage bar radical is 10 in bored concrete pile, a diameter of
20mm.The diameter of isolated tube is larger than the diameter of reinforcing bar, takes 28mm.The diameter of levelling backing plate is not less than the diameter of fender post.
Longitudinal reinforcement passes through pile body, and the upper edge portion of every reinforcing bar is processed into screw thread, and tooth-like, wherein spike-tooth height are processed into bottom
For 5mm, the distance between upper and lower spike-tooth is 9mm, and height is all 5mm on the upside of baffle plate, and height is 7mm on the left of baffle plate, on the right side of baffle plate
Height is 9mm.By the use of this retracting device and recovery method, it is not only able to reach recovery longitudinal reinforcement, reduces consumption, and
And the security of increase foundation ditch, there is good Social benefit and economic benefit.
The embodiment of the recovery method of bored concrete pile longitudinal reinforcement is in the foundation pit enclosure structure of the present embodiment：
1) size of determining device each several part.Before fender post of constructing, each portion is determined previously according to design drawing is gone along with sb. to guard him
Component specification used by part.This engineering annulus pile crown 1 takes external diameter 700mm, internal diameter 500mm, height 100mm；With leveling cushion
Plate takes external diameter 700mm, internal diameter 500mm, height 10mm, and interior slotted eye 9 is 10, is circumferentially evenly arranged；The lower end of longitudinal reinforcement
Spike-tooth haves three layers altogether, 4 every layer, symmetrical.
2) connection of longitudinal reinforcement lower end spike-tooth and annulus pile crown.Longitudinal reinforcement 2 is adjusted, makes the face guide groove 11 of spike-tooth 14,
Spike-tooth 14 is inserted into the bottom of interior slotted eye 9 along guide groove 11 again.Longitudinal reinforcement 2 is turned clockwise 45 degree.Again by longitudinal reinforcement 2 to
Upper drawing, and by the constraint of limited block 13, prevent from slipping from neck 12 during 2 stress stretch-draw anchor of longitudinal reinforcement.
3) isolated tube and longitudinal reinforcement socket.Isolated tube 3 is put to longitudinal reinforcement 2, makes longitudinal reinforcement 2 in casting concrete
During isolate with concrete, and the diameter of isolated tube 3 is more than bar diameter, and reinforcing bar can freely turn in isolated tube 3
Move and move up and down, facilitate the later stage of lengthways main steel bar to reclaim.
4) isolated tube is connected with annulus pile crown.Isolated tube 3 is inserted in the slot 10 of annulus pile crown.For the ease of every
It is inserted into from pipe 3 in the slot 10 of annulus pile crown, it is necessary to the diameter of isolated tube 3 is slightly smaller than the diameter of slot 10, in this example, isolated tube
3 a diameter of 28mm, a diameter of 32mm of slot 10.In order to prevent during the casting concrete slime water flow into slotted eye 9
In, using the space between epoxy resin sealing slot 10 and isolated tube 3, in order to avoid avoid influenceing the recovery of reinforcing bar.
5) isolated tube top plug is filled out.The upper end requirement of isolated tube 3 be higher than the 100mm of capping beam 7, and reinforcing bar and every
Filled out from the gap between pipe with soft filler plug, such as cotton, Bituminous hemp fiber, prevent that slime water flows into pipe during casting concrete
In.
6) stirrup is connected with isolated tube.Connected between stirrup 4 and isolated tube 3 using colligation, stirrup 4 and the shape of lengthways main steel bar 2
Into steel reinforcement cage overall skeleton.
7) bore stake holes, lay steel reinforcement cage, casting concrete, maintenance pile body.Fender post position on corresponding design drawing exists
Construction site carries out stake holes bore operation, after the completion of, the steel reinforcement cage overall skeleton combined is hung in drilling, by pile body coagulation
The conventional casting method of soil carries out pouring for pile body concrete, and carries out the maintenance of pile concrete.
8) construction and maintenance of capping beam.After pile concrete maintenance reaches design strength, the construction of capping beam 7 is carried out,
Cage bar 2 and isolated tube 3 in stake will pass through capping beam 7, and conserve capping beam 7.
9) longitudinal reinforcement tensioning and anchor.After capping beam reaches design strength, fallen with cutter cuts beyond capping beam 7
Isolated tube 3.Longitudinal reinforcement 2 is opened further according to design requirement through the perforation on levelling backing plate 6 with nut 5 to longitudinal reinforcement 2
Draw and anchor so that fender post 8 and capping beam 7 can form vertical horizontal to coordination work system.
10) longitudinal reinforcement 2 is reclaimed.After the completion of foundation ditch backfill, nut 5 and levelling backing plate 6 are removed, such longitudinal reinforcement is just
The bottom in inside groove hole 9 is fallen under meeting is automatic, at this moment completely disengages 45 degree of longitudinal reinforcement rotate counterclockwise, reinforcing bar bottom spike-tooth 14
Neck 12.The abandoned can of longitudinal reinforcement 2 is reused by upward extract, and recovery is completed.
Claims (5)
1. the recovery method of bored concrete pile longitudinal reinforcement in a kind of foundation pit enclosure structure, realizing the retracting device of the recovery method includes
Levelling backing plate, nut and annulus pile crown, the top of the longitudinal reinforcement is in threaded rod, and the bottom of the longitudinal reinforcement is in tooth-like
Structure, the levelling backing plate are located on capping beam, and the levelling backing plate one encloses to be provided with to be led to for what the longitudinal reinforcement top passed through
Hole, the nut, which is fixed on, to be stretched out on the threaded rod of levelling backing plate upper end；The annulus pile crown is located at below fender post, the circle
Ring pile crown one encloses the internal bore groove being provided with for longitudinal reinforcement bottom grafting, and the tooth-like structure is plugged on the internal bore groove
It is interior；The longitudinal reinforcement is enclosed in isolated tube, and the isolated tube upper end connects with the levelling backing plate, the lower end of the isolated tube
Connect with the annulus pile crown, the recovery method comprises the following steps：
1) before fender post of constructing, according to the specification for going along with sb. to guard him design drawing and determining levelling backing plate and annulus pile crown, and longitudinal direction
The top of reinforcing bar and the specification of bottom；
2) connection of longitudinal reinforcement lower end spike-tooth and annulus pile crown；
3) isolated tube and longitudinal reinforcement socket, longitudinal reinforcement freely can be rotated and moved up and down in isolated tube；
4) isolated tube is connected with annulus pile crown；
5) isolated tube top plug is filled out；
6) stirrup is connected with isolated tube：Connected between stirrup and isolated tube using colligation, stirrup and lengthways main steel bar form steel reinforcement cage
Overall skeleton；
7) bore stake holes, lay steel reinforcement cage, casting concrete, maintenance pile body；
8) construction and maintenance of capping beam, longitudinal reinforcement and isolated tube pass through capping beam, and conserve capping beam；
9) longitudinal reinforcement tensioning and anchor：After capping beam reaches design strength, longitudinal reinforcement passes through the perforation on levelling backing plate, then
Tensioning and anchoring are carried out to longitudinal reinforcement with nut according to design requirement so that fender post and capping beam can form perpendicular horizontal coordination
Work system；
10) longitudinal reinforcement is reclaimed, process is as follows：After the completion of foundation ditch backfill, remove nut and levelling backing plate, longitudinal reinforcement by
Upper to extract recycling, recovery is completed.
2. the recovery method of bored concrete pile longitudinal reinforcement in a kind of foundation pit enclosure structure as claimed in claim 1, it is characterised in that：
The tooth-like structure includes spike-tooth, and the internal bore groove includes slot and guide and limit groove, and the slot is located at guide and limit groove
Top, the internal diameter of the slot is bigger than the internal diameter of guide and limit groove, the guide and limit groove inwall be provided with for the spike-tooth from
The guide groove and the neck for spike-tooth positioning of top to bottm insertion, the guide groove in axially arranging up and down, and the neck is in level
Arc, the entrance of the neck communicate with guide groove；
In the step 2), longitudinal reinforcement is adjusted, makes spike-tooth face guide groove, then spike-tooth is inserted into the bottom of internal bore groove along guide groove,
Longitudinal reinforcement is turned clockwise into neck；
In the step 10), by longitudinal reinforcement rotate counterclockwise, reinforcing bar bottom spike-tooth completely disengages neck, abandoned vertical
Reused to reinforcing bar by upward extract.
3. the recovery method of bored concrete pile longitudinal reinforcement in a kind of foundation pit enclosure structure as claimed in claim 2, it is characterised in that：
The top of the joint of the neck and guide groove is provided with the limited block for being used for preventing that spike-tooth from skidding off from neck；
In the step 2), longitudinal reinforcement enter neck after, then by longitudinal reinforcement pull up until spike-tooth just with neck
Wall is bonded and fettered by limited block；
In the step 10), after removing nut and levelling backing plate, longitudinal reinforcement will fall automatically so that spike-tooth is from neck
Wall drops to neck lower wall, then by longitudinal reinforcement rotate counterclockwise.
4. the recovery method of bored concrete pile longitudinal reinforcement in a kind of foundation pit enclosure structure as described in one of claims 1 to 3, it is special
Sign is：In the step 4), isolated tube is inserted in the slot of annulus pile crown, using epoxy resin sealing slot and isolated tube
Between space.
5. the recovery method of bored concrete pile longitudinal reinforcement in a kind of foundation pit enclosure structure as described in one of claims 1 to 3, it is special
Sign is：In the step 5), the upper end requirement of isolated tube is higher than capping beam 100mm, and in longitudinal reinforcement and isolated tube
Between gap filled out with soft filler plug.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610293672.5A CN105908706B (en) | 2016-05-04 | 2016-05-04 | The recovery method of bored concrete pile longitudinal reinforcement in a kind of foundation pit enclosure structure |
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| CN201610293672.5A CN105908706B (en) | 2016-05-04 | 2016-05-04 | The recovery method of bored concrete pile longitudinal reinforcement in a kind of foundation pit enclosure structure |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107687267A (en) * | 2017-09-28 | 2018-02-13 | 开普天（上海）岩土科技有限公司 | Reinforcing bar is pulled out with clamping device and reinforcing bar removal method |
| CN108951613B (en) * | 2018-06-26 | 2021-04-02 | 北京健安诚岩土工程有限公司 | Recoverable steel reinforcement cage |
| CN113638428B (en) * | 2021-10-15 | 2022-02-08 | 索泰克(北京)岩土科技有限公司 | Detachable rib prestress supporting structure and manufacturing method thereof |
| CN113638404B (en) * | 2021-10-15 | 2022-02-08 | 索泰克(北京)岩土科技有限公司 | Detachable reinforcement cage and manufacturing method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1030807A (en) * | 1987-07-16 | 1989-02-01 | 朱传浦 | Concrete pipe pile provided with temporary prestressing force |
| CN2149419Y (en) * | 1993-01-19 | 1993-12-15 | 卫龙武 | Steel bar structure for reinforced convrete pile |
| GB2436582A (en) * | 2006-03-29 | 2007-10-03 | Cementation Found Skanska Ltd | Geothermal energy pile / foundation |
| CN201305955Y (en) * | 2008-10-27 | 2009-09-09 | 曹新恒 | Steel reinforcement cage hanging steel bar used for grouting piles |
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2016
- 2016-05-04 CN CN201610293672.5A patent/CN105908706B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1030807A (en) * | 1987-07-16 | 1989-02-01 | 朱传浦 | Concrete pipe pile provided with temporary prestressing force |
| CN2149419Y (en) * | 1993-01-19 | 1993-12-15 | 卫龙武 | Steel bar structure for reinforced convrete pile |
| GB2436582A (en) * | 2006-03-29 | 2007-10-03 | Cementation Found Skanska Ltd | Geothermal energy pile / foundation |
| CN201305955Y (en) * | 2008-10-27 | 2009-09-09 | 曹新恒 | Steel reinforcement cage hanging steel bar used for grouting piles |
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| CN105908706A (en) | 2016-08-31 |
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