CN105908706A - Recovering method for longitudinal reinforcements for bored pile in foundation pit support structure - Google Patents
Recovering method for longitudinal reinforcements for bored pile in foundation pit support structure Download PDFInfo
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- CN105908706A CN105908706A CN201610293672.5A CN201610293672A CN105908706A CN 105908706 A CN105908706 A CN 105908706A CN 201610293672 A CN201610293672 A CN 201610293672A CN 105908706 A CN105908706 A CN 105908706A
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- 230000002787 reinforcement Effects 0.000 title claims abstract description 127
- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000011084 recovery Methods 0.000 claims abstract description 25
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 24
- 239000010959 steel Substances 0.000 claims abstract description 24
- 238000012423 maintenance Methods 0.000 claims abstract description 15
- 238000010276 construction Methods 0.000 claims abstract description 13
- 230000003014 reinforcing effect Effects 0.000 claims description 22
- 238000005266 casting Methods 0.000 claims description 8
- 238000004064 recycling Methods 0.000 claims description 7
- 238000004873 anchoring Methods 0.000 claims description 5
- 239000003822 epoxy resin Substances 0.000 claims description 4
- 229920000647 polyepoxide Polymers 0.000 claims description 4
- 239000007943 implant Substances 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 238000002955 isolation Methods 0.000 abstract description 5
- 210000003205 muscle Anatomy 0.000 description 8
- 238000010586 diagram Methods 0.000 description 6
- 230000008901 benefit Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 230000007812 deficiency Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000011065 in-situ storage Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- RSWGJHLUYNHPMX-ONCXSQPRSA-N abietic acid Chemical compound C([C@@H]12)CC(C(C)C)=CC1=CC[C@@H]1[C@]2(C)CCC[C@@]1(C)C(O)=O RSWGJHLUYNHPMX-ONCXSQPRSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- 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
-
- 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
-
- 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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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention discloses a recovering method for longitudinal reinforcements for a bored pile in a foundation pit support structure. The recovering method comprises the following steps that 1) the specifications of various parts are determined according to an enclosure design drawing; 2) nail teeth at the lower ends of the longitudinal reinforcements are connected with an annular pile head; 3) an isolation tube is connected with the longitudinal reinforcements in a sleeved manner; 4) the isolation tube is connected with the annular pile head; 5) the upper part of the isolation tube is plugged and filled; 6) a stirrup is connected with the isolation tube; 7) a pile hole is drilled, a steel reinforcement cage is placed, concrete is poured, and a pile body is maintained; 8) construction and maintenance of a capping beam are carried out; 9) the longitudinal reinforcements are tensioned and anchored; and 10) the longitudinal reinforcements are recovered, wherein the process comprises the following steps that after a foundation pit is backfilled, nuts are disassembled, a backing plate is leveled, the longitudinal reinforcements are pulled out upward and reused, and recovery is finished. The recovering method recovers all the longitudinal stress reinforcements in the bored pile, lowers the cost and is convenient in operation.
Description
Technical field
The present invention relates to the recovery of longitudinal reinforcement in foundation ditch bored concrete pile, it is adaptable in building enclosure
Bored concrete pile, belongs to technical field of building construction.
Background technology
Along with the proposition of " 13 planning ", the energy consumption how reducing building industry becomes society already
Can energy-conserving and environment-protective, the most important thing of alleviating energy crisis.Campshed structural protective system at foundation ditch
In, bored concrete pile is that application is most common, because of its have, rigidity little to surrounding environment influence big,
Good stability, deform the features such as little, and be widely applied in bracing engineering.But
In foundation pit system, bored concrete pile is disposable component, mainly for the protection of basement construction mistake
Safety in journey, after basement backfill soil completes, goes along with sb. to guard him the bored concrete pile in being not and will no longer send out
Waving effect, the reinforcing bar retained in bored concrete pile then causes waste greatly.Recovery method at present
It is two presstressed reinforcing steels of employing in pile body, and reinforcing bar base plate is with bolts.Existing side
The deficiency of method has: 1) be only capable of reclaiming presstressed reinforcing steel, it is impossible to reclaim whole Reinforcement；2)
When reclaiming deformed bar, owing to reinforcing bar base plate is with bolts, and reinforcing bar is longer, difficult
So that reinforcing bar is screwed out from bolt hole, thus it is unsuccessful to cause reinforcing bar to reclaim；3) do not have and bear down on one
Beam forms vertical horizontal to coordination work system, it is difficult to play prestressing force effect；4) need first to abolish pressure
Back timber could reclaim deformed bar, and difficulty is big, and cost is high, operation complexity.
Summary of the invention
In order to overcome bored concrete pile Reinforcement in existing foundation pit system to reclaim or return
Receive difficulty, cost is high, operate complicated deficiency, and it is complete that the present invention provides one to realize in bored concrete pile
Portion's Reinforcement reclaims, reduces bored concrete pile in cost, easy to operate foundation pit enclosure structure
The recovery method of longitudinal reinforcement.
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, it is achieved this recovery side
The retracting device of method includes levelling backing plate, nut, isolated tube and annulus pile crown, described longitudinal steel
The top of muscle is threaded rod, and the bottom of described longitudinal reinforcement is tooth-like structure, described leveling cushion
Plate is positioned on capping beam, and described levelling backing plate one circle has and supplies described longitudinal reinforcement top to pass
Through hole, described nut is fixed on the threaded rod stretching out levelling backing plate upper end；Described annulus pile crown
Being positioned at below fender post, the first circle of described circular annular pile has for described longitudinal reinforcement bottom grafting
Internal bore groove, described tooth-like structure is plugged in described internal bore groove；Described longitudinal reinforcement be enclosed within every
From pipe in, described isolated tube upper end connects with described levelling backing plate, the lower end of described isolated tube and
Described annulus pile crown connects, and described recovery method comprises the steps:
1) before construction fender post, levelling backing plate and circular annular pile are determined according to going along with sb. to guard him design drawing
The specification of head, and the top of longitudinal reinforcement and the specification of bottom；
2) longitudinal reinforcement lower end spike-tooth and the connection of annulus pile crown；
3) isolated tube and longitudinal reinforcement socket, longitudinal reinforcement can in isolated tube freely rotatable and
Move up and down；
4) isolated tube is connected with annulus pile crown；
5) isolated tube top plug is filled out；
6) stirrup is connected with isolated tube: between stirrup with isolated tube use colligation is connected, stirrup with
Lengthways main steel bar forms steel reinforcement cage entirety skeleton；
7) bore stake holes, lay steel reinforcement cage, casting concrete, maintenance pile body；
8) construction and maintenance, longitudinal reinforcement and the isolated tube of capping beam passes capping beam, and maintenance
Capping beam；
9) longitudinal reinforcement stretch-draw anchoring: after capping beam reaches design strength, longitudinal reinforcement passes
Perforation on levelling backing plate, carries out stretch-draw and anchor further according to design requirement nut to longitudinal reinforcement
Gu so that fender post and capping beam can form vertical horizontal to coordination work system；
10) reclaim longitudinal reinforcement, process is as follows: after foundation ditch backfill, remove nut with
Levelling backing plate, longitudinal steel reinforcing bar upwards extracted recycling, and recovery completes.
Further, described tooth-like structure includes that spike-tooth, described internal bore groove include slot and guiding
Stopper slot, described slot is positioned at the top of guide and limit groove, and the internal diameter of described slot is than guiding limit
The internal diameter of position groove is big, and described guide and limit groove inwall has and supplies described spike-tooth to insert from top to bottom
Guide groove and for described spike-tooth location draw-in groove, described guide groove in axially arranging up and down, described draw-in groove
In horizontal arc, the entrance of described draw-in groove communicates with guide groove.
Described step 2) in, adjust longitudinal reinforcement, make spike-tooth just to guide groove, then by spike-tooth edge
Guide groove is inserted into the bottom of inside groove 9, is turned clockwise by longitudinal reinforcement in entrance draw-in groove；
Described step 10) in, longitudinal reinforcement is rotated counterclockwise, reinforcing bar bottom ailhead is the most de-
From draw-in groove, abandoned longitudinal reinforcement is upwards extracted recycling.
Further, the top of the joint of described draw-in groove and guide groove be provided with for prevent spike-tooth from
The limited block that draw-in groove skids off；
Described step 2) in, after longitudinal reinforcement enters draw-in groove, then longitudinal reinforcement is pulled up
Until spike-tooth is just fitted with draw-in groove upper wall and is fettered by limited block；
Described step 10) in, after removing nut and levelling backing plate, longitudinal reinforcement will automatically under
Fall so that spike-tooth drops to draw-in groove lower wall from draw-in groove upper wall, then is rotated counterclockwise by longitudinal reinforcement.
Further, described step 4) in, isolated tube is inserted in the slot of annulus pile crown,
Use the space between epoxy resin sealing slot and isolated tube.
Described step 5) in, the upper end of isolated tube requires higher than capping beam 100mm, and
Gap between longitudinal reinforcement and isolated tube is filled out with soft implant plug.
The technology of the present invention is contemplated that: fender post and capping beam by annulus pile crown, longitudinal reinforcement,
Levelling backing plate and nut are linked to be a vertically and horizontally stress entirety.Upper top one fixed length of longitudinal reinforcement
Degree scope is processed into threaded rod, and bottom certain length scope is processed into tooth-like structure.Circular annular pile
Head is hollow cylinder, if wherein on the upside of cylindrical wall number of steel bars according to design be provided with individual relatively
The interior slotted eye answered.Interior slotted eye is made up of slot, guide groove, draw-in groove, and longitudinal reinforcement mainly given by guide groove
On spike-tooth play the effect of directional guide, draw-in groove is used for retraining spike-tooth, so that under longitudinal reinforcement
End links together with annulus pile crown.Isolated tube from top to bottom through longitudinal reinforcement, its underpart with
Utilize the adhesive such as epoxy resin cemented together between the slot of annulus pile crown.Longitudinal reinforcement leads to
Cross stirrup connection, increase lateral restriction, form overall skeleton.
Not only meet the functional requirements such as cast-in-situ bored pile intensity in foundation ditch system and deformation, and
And have that simple to operate, easy construction, low cost, speed is fast, safety advantages of higher.
Beneficial effects of the present invention is mainly manifested in: (1) response rate is high.When fender post works,
Reinforcement is isolated with concrete completely, after foundation ditch backfill soil completes, and can be by all
Reinforcement departs from from pile body and reclaims.(2) low cost, economic and social benefit is good.
This device uses common materials, and materials are few, is worth far below reclaimed longitudinal reinforcement, and drops
Low consumption, social and economic benefits and good.(3) simple, easy to operate.Need not the most broken
Lengthways main steel bar just can be reclaimed except capping beam, and just can be by steel by rotating unconfined reinforcing bar
Muscle is fixed or reclaims.(4) cooperative bearing system, safety is high.By Shi Hanzhang,
Pile body and capping beam are formed and are reliably connected, and constitute vertical horizontal to coordination work system, retaining design
Degree of safety high.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the retracting device of bored concrete pile longitudinal reinforcement in foundation pit enclosure structure.
Fig. 2 is the overall profile of Fig. 1.
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 the longitudinal sectional view of Fig. 6.
Fig. 8 is the transverse sectional view of Fig. 7.
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.
Detailed description of the invention
The invention will be further described below in conjunction with the accompanying drawings.
With reference to Fig. 1～Figure 11, the recovery side of bored concrete pile longitudinal reinforcement in a kind of foundation pit enclosure structure
Method, it is achieved the retracting device of this recovery method includes levelling backing plate 6, nut 5, isolated tube 3
With annulus pile crown 1, described foundation pit enclosure structure includes capping beam 7 and fender post 8, described in bear down on one
Beam 7 is positioned on fender post 7, and described longitudinal reinforcement 2 passes capping beam 7 from top to bottom and goes along with sb. to guard him
Stake 8, the top of described longitudinal reinforcement 2 is threaded rod, and the bottom of described longitudinal reinforcement 2 is nail
Dentalation, described levelling backing plate 6 is positioned on described capping beam 7, described levelling backing plate 6 one
Circle has the through hole passed for described longitudinal reinforcement top, described nut 5 be fixed on stretch out levelling
On the threaded rod of backing plate 6 upper end；Described annulus pile crown 1 is positioned at below fender post 8, described circle
Ring pile crown 1 one circle has the internal bore groove 9 for described longitudinal reinforcement 2 bottom grafting, described spike-tooth
Shape structure is plugged in described internal bore groove 9；Described longitudinal reinforcement 2 is enclosed within isolated tube 3, institute
Stating isolated tube 3 upper end to connect with described levelling backing plate 6, the lower end of described isolated tube 3 is with described
Annulus pile crown 1 connects, and described recovery method comprises the steps:
1) before construction fender post, levelling backing plate and circular annular pile are determined according to going along with sb. to guard him design drawing
The specification of head, and the top of longitudinal reinforcement and the specification of bottom；
2) longitudinal reinforcement lower end spike-tooth and the connection of annulus pile crown；
3) isolated tube and longitudinal reinforcement socket, longitudinal reinforcement can in isolated tube freely rotatable and
Move up and down；
4) isolated tube is connected with annulus pile crown；
5) isolated tube top plug is filled out；
6) stirrup is connected with isolated tube: between stirrup with isolated tube use colligation is connected, stirrup with
Lengthways main steel bar forms steel reinforcement cage entirety skeleton；
7) bore stake holes, lay steel reinforcement cage, casting concrete, maintenance pile body；
8) construction and maintenance, longitudinal reinforcement and the isolated tube of capping beam passes capping beam, and maintenance
Capping beam；
9) longitudinal reinforcement stretch-draw anchoring: after capping beam reaches design strength, longitudinal reinforcement passes
Perforation on levelling backing plate, carries out stretch-draw and anchor further according to design requirement nut to longitudinal reinforcement
Gu so that fender post and capping beam can form vertical horizontal to coordination work system；
10) reclaim longitudinal reinforcement, process is as follows: after foundation ditch backfill, remove nut with
Levelling backing plate, longitudinal steel reinforcing bar upwards extracted recycling, and recovery completes.
Further, described tooth-like structure includes that spike-tooth 14, described internal bore groove include slot 10
With guide and limit groove, described slot 10 is positioned at the top of guide and limit groove, described slot 10
Internal diameter is bigger than the internal diameter of guide and limit groove, described guide and limit groove inwall have for described spike-tooth from
The guide groove 11 that top to bottm inserts and the draw-in groove 12 for described spike-tooth location, described guide groove 11 is in axle
To arranging up and down, described draw-in groove 12 in horizontal arc, the entrance of described draw-in groove 12 and guide groove 11
Communicate；
Described step 2) in, adjust longitudinal reinforcement, make spike-tooth just to guide groove, then by spike-tooth edge
Guide groove is inserted into the bottom of inside groove 9, is turned clockwise by longitudinal reinforcement in entrance draw-in groove；
Described step 10) in, longitudinal reinforcement is rotated counterclockwise, reinforcing bar bottom ailhead is the most de-
From draw-in groove, abandoned longitudinal reinforcement is upwards extracted recycling.
Further, described draw-in groove 12 is provided with for preventing with the top of the joint of guide groove 11
The limited block that spike-tooth skids off from draw-in groove；
Described step 2) in, after longitudinal reinforcement enters draw-in groove, then longitudinal reinforcement is pulled up
Until spike-tooth is just fitted with draw-in groove upper wall and is fettered by limited block；
Described step 10) in, after removing nut and levelling backing plate, longitudinal reinforcement will automatically under
Fall so that spike-tooth drops to draw-in groove lower wall from draw-in groove upper wall, then is rotated counterclockwise by longitudinal reinforcement.
The cutting depth of certain foundation ditch is 6.95m, uses the cast-in-situ bored pile of mud off, and stake is a length of
14m, diameter 700mm, capping beam thickness 600mm, strength grade of concrete is C25, stake number
It it is 556.In bored concrete pile, main muscle radical is 10, a diameter of 20mm.The diameter of isolated tube
It is larger than the diameter of reinforcing bar, takes 28mm.The diameter of levelling backing plate is straight not less than fender post
Footpath.Longitudinal reinforcement passes pile body, and the upper edge portion of every reinforcing bar is processed into screw thread, and bottom adds
Work becomes tooth-like, and wherein spike-tooth height is 5mm, and the distance between upper and lower spike-tooth is 9mm,
Being the most all 5mm on the upside of baffle plate, on the left of baffle plate, height is 7mm, and on the right side of baffle plate, height is
9mm.By this retracting device and the use of recovery method, it is not only able to reach to reclaim longitudinal steel
Muscle, reduces and consumes, and increase the safety of foundation ditch, have good social benefit and economy
Benefit.
The embodiment party of the recovery method of bored concrete pile longitudinal reinforcement in the foundation pit enclosure structure of the present embodiment
Case is:
1) size of device each several part is determined.Before construction fender post, set previously according to going along with sb. to guard him
Meter drawing determines the component specification that each parts are used.This engineering annulus pile crown 1 takes external diameter
700mm, internal diameter 500mm, highly 100mm；External diameter 700mm is taken with levelling backing plate, interior
Footpath 500mm, highly 10mm, interior slotted eye 9 is 10, is circumferentially evenly arranged；Longitudinally
The lower end spike-tooth of reinforcing bar haves three layers altogether, 4 every layer, symmetrical.
2) longitudinal reinforcement lower end spike-tooth and the connection of annulus pile crown.Adjust longitudinal reinforcement 2, make nail
Tooth 14 is just to guide groove 11, then spike-tooth 14 is inserted into the bottom of interior slotted eye 9 along guide groove 11.Will
Longitudinal reinforcement 2 turns clockwise 45 degree.Again longitudinal reinforcement 2 is pulled up, and by limited block
The constraint of 13, prevents from slipping from draw-in groove 11 during longitudinal reinforcement 2 stress stretch-draw anchor.
3) isolated tube and longitudinal reinforcement socket.Put isolated tube 3 to longitudinal reinforcement 2, make longitudinal direction
Reinforcing bar 2 is isolated with concrete during casting concrete, and the diameter of isolated tube 3 is big
In bar diameter, reinforcing bar can be freely rotatable and move up and down in isolated tube 3, convenient longitudinally
The later stage of main muscle reclaims.
4) isolated tube is connected with annulus pile crown.Isolated tube 3 is inserted the slot of annulus pile crown
In 10.For the ease of isolated tube 3 is inserted in the slot 10 of annulus pile crown, need isolation
Pipe 3 diameter is slightly smaller than slot 10 diameter, in this example, a diameter of 28mm of isolated tube 3, inserts
A diameter of 32mm of groove 10.In preventing during casting concrete slime water to flow into
In slotted eye 9, use the space between epoxy resin sealing slot 10 and isolated tube 3, in order to avoid keeping away
Exempt to affect the recovery of reinforcing bar.
5) isolated tube top plug is filled out.The upper end of isolated tube 3 requires higher than capping beam 7100mm,
And the gap between reinforcing bar and isolated tube is filled out with soft implant plug, such as Cotton Gossypii, Colophonium fiber crops
Silks etc., during when preventing casting concrete, slime water flows into pipe.
6) stirrup is connected with isolated tube.Colligation is used to be connected between stirrup 4 with isolated tube 3, hoop
Muscle 4 and lengthways main steel bar 2 form steel reinforcement cage entirety skeleton.
7) bore stake holes, lay steel reinforcement cage, casting concrete, maintenance pile body.Corresponding design drawing
On fender post position carry out stake holes bore operation on construction ground, after completing, by combine
Steel reinforcement cage entirety skeleton hangs in boring, carries out pile body by the conventional casting method of pile body concrete
Pouring of concrete, and carry out the maintenance of pile concrete.
8) construction of capping beam and maintenance.After pile concrete maintenance reaches design strength, carry out
The construction of capping beam 7, the main muscle 2 in stake and isolated tube 3 capping beam to be passed 7, and maintenance
Capping beam 7.
9) longitudinal reinforcement stretch-draw anchoring.After capping beam reaches design strength, use cutter cuts
Fall the isolated tube 3 beyond capping beam 7.Longitudinal reinforcement 2 passes the perforation on levelling backing plate 6,
Further according to design requirement nut 5, longitudinal reinforcement 2 is carried out stretch-draw and anchoring so that fender post
8 and capping beam 7 can form vertical horizontal to coordination work system.
10) longitudinal reinforcement 2 is reclaimed.After foundation ditch has backfilled, remove nut 5 and leveling cushion
Plate 6, such longitudinal reinforcement will drop to the bottom of interior slotted eye 9 automatically, at this moment by longitudinal direction steel
Muscle rotates 45 degree counterclockwise, and reinforcing bar bottom spike-tooth 14 completely disengages from draw-in groove 12.Abandoned
Longitudinal reinforcement 2 just can upwards be extracted recycling, and recovery completes.
Claims (5)
1. the recovery method of bored concrete pile longitudinal reinforcement in a foundation pit enclosure structure, it is achieved this recovery method
Retracting device include levelling backing plate, nut and annulus pile crown, the top of described longitudinal reinforcement in
Threaded rod, the bottom of described longitudinal reinforcement is tooth-like structure, and described levelling backing plate is positioned at and bears down on one
Liang Shang, described levelling backing plate one circle has the through hole passed for described longitudinal reinforcement top, described
Nut is fixed on the threaded rod stretching out levelling backing plate upper end；Described annulus pile crown is positioned at fender post
Lower section, the first circle of described circular annular pile has the internal bore groove for described longitudinal reinforcement bottom grafting, institute
State tooth-like structure to be plugged in described internal bore groove；Described longitudinal reinforcement is enclosed within isolated tube, institute
State isolated tube upper end to connect with described levelling backing plate, the lower end of described isolated tube and described circular annular pile
Head connects, and described recovery method comprises the steps:
1) before construction fender post, levelling backing plate and circular annular pile are determined according to going along with sb. to guard him design drawing
The specification of head, and the top of longitudinal reinforcement and the specification of bottom；
2) longitudinal reinforcement lower end spike-tooth and the connection of annulus pile crown；
3) isolated tube and longitudinal reinforcement socket, longitudinal reinforcement can in isolated tube freely rotatable and
Move up and down；
4) isolated tube is connected with annulus pile crown；
5) isolated tube top plug is filled out；
6) stirrup is connected with isolated tube: between stirrup with isolated tube use colligation is connected, stirrup with
Lengthways main steel bar forms steel reinforcement cage entirety skeleton；
7) bore stake holes, lay steel reinforcement cage, casting concrete, maintenance pile body；
8) construction and maintenance, longitudinal reinforcement and the isolated tube of capping beam passes capping beam, and maintenance
Capping beam；
9) longitudinal reinforcement stretch-draw anchoring: after capping beam reaches design strength, longitudinal reinforcement passes
Perforation on levelling backing plate, carries out stretch-draw and anchor further according to design requirement nut to longitudinal reinforcement
Gu so that fender post and capping beam can form vertical horizontal to coordination work system；
10) reclaim longitudinal reinforcement, process is as follows: after foundation ditch backfill, remove nut with
Levelling backing plate, longitudinal steel reinforcing bar upwards extracted recycling, and recovery completes.
The recovery side of bored concrete pile longitudinal reinforcement in a kind of foundation pit enclosure structure the most as claimed in claim 1
Method, it is characterised in that: described tooth-like structure include spike-tooth, described internal bore groove include slot and
Guide and limit groove, described slot is positioned at the top of guide and limit groove, and the internal diameter ratio of described slot is led
Big to the internal diameter of stopper slot, described guide and limit groove inwall has to be inserted from top to bottom for described spike-tooth
The guide groove entered and the draw-in groove positioned for described spike-tooth, described guide groove is in axially arranging up and down, described
Draw-in groove is horizontal arc, and the entrance of described draw-in groove communicates with guide groove；
Described step 2) in, adjust longitudinal reinforcement, make spike-tooth just to guide groove, then by spike-tooth edge
Guide groove is inserted into the bottom of inside groove 9, is turned clockwise by longitudinal reinforcement in entrance draw-in groove；
Described step 10) in, longitudinal reinforcement is rotated counterclockwise, reinforcing bar bottom ailhead is the most de-
From draw-in groove, abandoned longitudinal reinforcement is upwards extracted recycling.
The recovery side of bored concrete pile longitudinal reinforcement in a kind of foundation pit enclosure structure the most as claimed in claim 2
Method, it is characterised in that: described draw-in groove is provided with for preventing spike-tooth with the top of the joint of guide groove
The limited block skidded off from draw-in groove；
Described step 2) in, after longitudinal reinforcement enters draw-in groove, then longitudinal reinforcement is pulled up
Until spike-tooth is just fitted with draw-in groove upper wall and is fettered by limited block；
Described step 10) in, after removing nut and levelling backing plate, longitudinal reinforcement will automatically under
Fall so that spike-tooth drops to draw-in groove lower wall from draw-in groove upper wall, then is rotated counterclockwise by longitudinal reinforcement.
4. bored concrete pile longitudinal reinforcement in a kind of foundation pit enclosure structure as described in one of claims 1 to 3
Recovery method, it is characterised in that: described step 4) in, isolated tube is inserted annulus pile crown
Slot in, use the space between epoxy resin sealing slot and isolated tube.
5. bored concrete pile longitudinal reinforcement in a kind of foundation pit enclosure structure as described in one of claims 1 to 3
Recovery method, it is characterised in that: described step 5) in, the upper end of isolated tube requires height
In capping beam 100mm, and the gap between longitudinal reinforcement and isolated tube is by soft implant
Plug is filled out.
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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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| CN105908706B CN105908706B (en) | 2017-12-22 |
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Cited By (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 |
| CN108951613A (en) * | 2018-06-26 | 2018-12-07 | 北京健安诚岩土工程有限公司 | A kind of recyclable steel reinforcement cage |
| CN113638428A (en) * | 2021-10-15 | 2021-11-12 | 索泰克(北京)岩土科技有限公司 | Detachable rib prestress supporting structure and manufacturing method thereof |
| CN113638404A (en) * | 2021-10-15 | 2021-11-12 | 索泰克(北京)岩土科技有限公司 | Detachable reinforcement cage and manufacturing method thereof |
Citations (4)
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| CN2149419Y (en) * | 1993-01-19 | 1993-12-15 | 卫龙武 | Steel bar structure for reinforced convrete pile |
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Cited By (6)
| 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 |
| CN108951613A (en) * | 2018-06-26 | 2018-12-07 | 北京健安诚岩土工程有限公司 | A kind of recyclable steel reinforcement cage |
| 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 |
| CN113638428A (en) * | 2021-10-15 | 2021-11-12 | 索泰克(北京)岩土科技有限公司 | Detachable rib prestress supporting structure and manufacturing method thereof |
| CN113638404A (en) * | 2021-10-15 | 2021-11-12 | 索泰克(北京)岩土科技有限公司 | Detachable reinforcement cage 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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| CN105908706B (en) | 2017-12-22 |
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