CN109024570A - Recyclable group's beam post-tensioning prestressing without bondn drill-pouring supporting pile structure and method - Google Patents
Recyclable group's beam post-tensioning prestressing without bondn drill-pouring supporting pile structure and method Download PDFInfo
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- CN109024570A CN109024570A CN201810568767.2A CN201810568767A CN109024570A CN 109024570 A CN109024570 A CN 109024570A CN 201810568767 A CN201810568767 A CN 201810568767A CN 109024570 A CN109024570 A CN 109024570A
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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
- E02D5/36—Concrete or concrete-like piles cast in position ; Apparatus for making same making without use of mouldpipes or other moulds
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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
- E02D5/58—Prestressed concrete piles
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Abstract
The present invention provides a kind of recyclable group's beam post-tensioning prestressing without bondn drill-pouring supporting pile structure and methods, the supporting pile structure includes steel reinforcement cage and the prestressing force group's tread assembly being set on steel reinforcement cage, prestressing force group tread assembly is assembled with porous fixing end anchorage by prestressing force group beam and is formed, the lower end of prestressing force group's beam is installed in porous fixing end anchorage, the positioning bracket for carrying porous fixing end anchorage is provided in steel reinforcement cage, each prestressing force group beam includes several working cables and tool rope, tool rope and working cable are linear type unbonded prestressing tendon, unbonded prestressing tendon includes steel strand wires and the protecting pipe that is sheathed on the outside of steel strand wires, porous fixing end anchorage can anchor but also disanchor the steel strand wires of working cable, to can both improve the structural behaviour of fender post, improve the crack resistance of fender post, it can be tied again in underground Realize that the recycling and reusing of presstressed reinforcing steel meets environmentally protective theory to reduce construction cost when fender post is discarded after the completion of structure.
Description
Technical field
The present invention relates in construction fender post field more particularly to a kind of recyclable group's beam post-tensioning soap-free emulsion polymeization answer in advance
Power drill-pouring supporting pile structure and method.
Background technique
Cast-in-situ bored pile is a kind of pile-type classified by pile making method and defined.Cast-in-situ bored pile refers to logical in engineering site
Cross machine drilling and form stake holes in foundation soil, and in it place framework of steel reinforcement (i.e. steel reinforcement cage), concrete perfusion and make
At stake.
Cast-in-situ bored pile is widely applied in subterranean excavation building enclosure, and after the completion of underground structure, pile body is by discarded shape
At underground garbage, have a great impact for the exploitation of the following underground space.
In order to improve the structural behaviour of fender post, the crack resistance of fender post is improved, the amount of reinforcement of steel reinforcement cage is reduced, is mitigated
The weight of steel reinforcement cage, usually increases presstressed reinforcing steel in cast-in-situ bored pile.But it cannot achieve the pre- of cast-in-situ bored pile at present and answer
The recycling and reusing of power muscle.
How the recycling of presstressed reinforcing steel cast-in-situ bored pile in is realized, to reduce for the unfavorable of the following underground space development
It influences, improves the structural behaviour of pile body, reduce construction cost, meet environmentally protective and precision construction modern concepts, be ability
A domain technical problem urgently to be resolved.
Summary of the invention
The purpose of the present invention is to provide a kind of recyclable group's beam post-tensioning prestressing without bondn drill-pouring supporting pile structures
And method, it can both improve the structural behaviour of fender post, improve the crack resistance of fender post, and back wall can be completed in underground structure
The recycling and reusing of presstressed reinforcing steel is realized when fender pile is discarded, to reduce construction cost, meets environmentally protective theory, and can be with
Reduce the adverse effect for the following underground space development.
In order to solve the above technical problems, the invention provides the following technical scheme:
A kind of recyclable group's beam post-tensioning prestressing without bondn drill-pouring supporting pile structure, including steel reinforcement cage and be set to
Prestressing force group's tread assembly on steel reinforcement cage, the upper end of steel reinforcement cage are arranged collar tie beam, and prestressing force group tread assembly is by prestressing force group beam and more
Hole fixing end anchorage assembles to be formed, and the top surface of collar tie beam, the lower end of the prestressing force group beam are stretched out in the upper end of the prestressing force group beam
It is installed in the porous fixing end anchorage, each prestressing force group beam includes several for being answered in advance the application of drill-pouring fender post
The working cable of power and tool rope for disanchoring to working cable, the working cable are compassingly set at outside the tool rope
Side, the tool rope and the working cable are linear type unbonded prestressing tendon, and the unbonded prestressing tendon includes that steel twists
Line and the protecting pipe being sheathed on the outside of steel strand wires, porous fixing end anchorage can anchor but also disanchor the steel strand wires of working cable.
Preferably, described pre- in above-mentioned recyclable group's beam post-tensioning prestressing without bondn drill-pouring supporting pile structure
The quantity of stress group's beam be it is multiple, be uniformly arranged on the steel reinforcement cage, the steel reinforcement cage by spiral hoop with it is several non-prestressed
Reinforcing bar connection composition, multiple prestressing force group beams are uniformly arranged on the surrounding of the spiral hoop.
Preferably, described more in above-mentioned recyclable group's beam post-tensioning prestressing without bondn drill-pouring supporting pile structure
Hole fixing end anchorage includes outer anchor ring, interior anchor block, first clamping piece group, pressure-bearing end plate and seal bootr, right on the pressure-bearing end plate
It should be equipped with the through-hole passed through for the steel strand wires of working cable and tool rope, the outer anchor ring is set to the following table of the pressure-bearing end plate
Face, the interior anchor block are set to the inside of the outer anchor ring, each interior anchor block and outer anchor ring around the steel strand wires of the tool rope
Between form one for accommodating the space of first clamping piece group, successively drawing-in steel sleeve connects for the lower end of the steel strand wires of the working cable
Connector, pressure-bearing end plate correspondence through-hole and interior anchor block and outer anchor ring between for accommodating the space of first clamping piece group, it is described
First clamping piece group includes that at least two panels first clamping piece, at least two panels first clamping piece is described around the setting of corresponding steel strand wires
First clamping piece group does compression processing in the space for accommodating first clamping piece group, and the seal bootr is set to the pressure-bearing end plate
Downside, the outer anchor ring, interior anchor block, first clamping piece group and group's prestressing tendon lower end be located in the seal bootr, it is described
Grease is injected in seal bootr, it is described for accommodating first clamping piece group when interior anchor block is located at the outside of the steel strand wires of tool rope
Space is the first bellmouth up and down；When the steel strand wires of the tool rope are pulled away interior anchor block, interior anchor block and outer anchor block
Between the space of accommodating first clamping piece group become larger so that first clamping piece group loosens the bite force realization to the steel strand wires of working cable
It disanchors.
Preferably, described to hold in above-mentioned recyclable group's beam post-tensioning prestressing without bondn drill-pouring supporting pile structure
The upper surface of pressure side plate corresponds to each through-hole and is fixed with steel pipe socket connector, and the protecting pipe of the unbonded prestressing tendon penetrates
In corresponding steel bushing pipe connector, using hydraulic device by the protecting pipe of unbonded prestressing tendon and corresponding steel bushing pipe connector
It is connected.
Preferably, it in above-mentioned recyclable group's beam post-tensioning prestressing without bondn drill-pouring supporting pile structure, is answering in advance
That one end that power group's beam stretches out collar tie beam top surface successively installs anchor plate and porous stretching end anchorage, the anchor plate are set to circle
The top surface of beam, the porous stretching end anchorage include tensioning anchor slab and several second intermediate plate groups, and the tensioning anchor slab is set to
The upside of anchor plate is correspondingly provided with the second bellmouth passed through for the steel strand wires of working cable and tool rope on the tensioning anchor slab,
The second intermediate plate group is equipped in second bellmouth of corresponding working cable, each second intermediate plate group is pressed from both sides including at least two piece second
Piece, at least two pieces of second intermediate plates are set around the outside of the steel strand wires of tool rope, and the second intermediate plate connects with steel strand wires
The surface of touching is equipped with sawtooth, and second intermediate plate loosens steel strand wires when being displaced outwardly with respect to tensioning anchor slab, second intermediate plate is with respect to tensioning anchor
Tight steel strand wires are stung when plate moves inward.
Preferably, in above-mentioned recyclable group's beam post-tensioning prestressing without bondn drill-pouring supporting pile structure, further include
The tensioning equipment of steel strand wires for tensioning working cable, the tensioning equipment include the limit plate set gradually from the bottom to top, wear
Core type jack and porous tool anchor, the surrounding of the limit plate have the support portion of evagination, and the limit plate passes through described
Support portion is set on porous tension ground tackle, so that being equipped with gap between the limit plate and porous tension ground tackle.
Preferably, in above-mentioned recyclable group's beam post-tensioning prestressing without bondn drill-pouring supporting pile structure, further include
The relief arrangement of off-load is carried out for the steel strand wires to working cable, the relief arrangement includes off-load bracket, centre-hole jack
And porous tool anchor, the off-load bracket are set between porous tension ground tackle and centre-hole jack.
Preferably, in above-mentioned recyclable group's beam post-tensioning prestressing without bondn drill-pouring supporting pile structure, further include
Bearing plate, spiral bar, several screw rods and several nuts are opened up on the bearing plate and are worn for working cable, tool rope and screw rod
Through-hole more, the bearing plate are arranged at intervals at the top of the porous fixing end anchorage, institute by the screw rod and nut
Spiral bar is stated between the bearing plate and porous fixing end anchorage.
Preferably, in above-mentioned recyclable group's beam post-tensioning prestressing without bondn drill-pouring supporting pile structure, the steel
The lower part of muscle cage is provided with the positioning bracket for being used to support the porous fixing end anchorage.
The invention also discloses a kind of constructions of recyclable group's beam post-tensioning prestressing without bondn drill-pouring supporting pile structure
Method, comprising:
Prestressing force group beam and porous fixing end anchorage are assembled to form prestressing force group's tread assembly, under the prestressing force group beam
End is installed in the porous fixing end anchorage, and each prestressing force group beam includes several pre- for applying to drill-pouring fender post
The working cable of stress and tool rope for disanchoring to working cable, the working cable are compassingly set at outside the tool rope
Side, the tool rope and the working cable are linear type unbonded prestressing tendon, and the unbonded prestressing tendon includes that steel twists
Line and the protecting pipe being sheathed on the outside of steel strand wires, the porous fixing end anchorage can anchor but also disanchor working cable steel twist
Line；
Several prestressing force group tread assemblies are installed on steel reinforcement cage；
It will be equipped in the reinforcing bar cage hoisting to the stake holes for excavating completion of several prestressing force group tread assemblies；
It pours stake holes concrete and forms drill-pouring fender post；
After collar tie beam reaches design strength, collar tie beam is poured above drill-pouring fender post；
After collar tie beam reaches design strength, prestressing force group's beam stretch out collar tie beam top surface that one end successively install anchor plate and
Porous stretching end anchorage；
The steel strand wires of working cable in stretch-draw prestressing force group's beam；
Underground Construction is carried out,
After the completion of Underground Construction, off-load is carried out to the steel strand wires of working cable；
The steel strand wires of recycling tool rope, so that the steel strand wires of working cable are disanchored；
Using manpower or the steel strand wires of admission machine recovery operation rope after disanchoring.
Preferably, in the construction method of above-mentioned recyclable group's beam post-tensioning prestressing without bondn drill-pouring supporting pile structure
In, when recycling, first applies pulling capacity with the steel strand wires of preceding cassette punching jack pair tool rope, the steel strand wires of tool rope are pulled away
Porous fixing end anchorage realizes disanchoring to the steel strand wires of working cable while recycling the steel strand wires of tool rope；It is used after disanchoring
The steel strand wires of manpower or admission machine recovery operation rope.
By techniques disclosed above scheme it is found that compared with prior art, beneficial effects of the present invention are as follows:
Recyclable group's beam post-tensioning prestressing without bondn drill-pouring supporting pile structure provided by the invention, it is mixed in regular reinforcement
On the basis of solidifying soil drill-pouring fender post, it is configured with prestressing force group's beam, improves the crack resistance of stake, reduces regular reinforcement use
Amount, alleviates framework of steel reinforcement (i.e. steel reinforcement cage) weight.Prestressing force group's beam includes several pre- for applying to drill-pouring fender post
The working cable of stress and tool rope for disanchoring to working cable, the working cable are compassingly set at outside the tool rope
Side, the tool rope and the working cable are linear type unbonded prestressing tendon, and the unbonded prestressing tendon includes that steel twists
The lower end installation one of line and the protecting pipe being sheathed on the outside of steel strand wires, prestressing force group's beam can anchor but also disanchor presstressed reinforcing steel
Anchor, so as to realize prestressing force group's beam steel strand wires easy recycling, and steel strand wires will not be by removal process
It to damage, can repeatedly use, reduce construction cost.
The construction method of recyclable group's beam post-tensioning prestressing without bondn drill-pouring supporting pile structure provided by the invention is led to
It crosses and several prestressing force group tread assemblies is installed on steel reinforcement cage, by the reinforcing bar cage hoisting for being equipped with several prestressing force group tread assemblies to opening
It digs in the stake holes completed, pours stake holes concrete and form drill-pouring fender post, pour collar tie beam above drill-pouring fender post,
After collar tie beam reaches design strength, anchor plate and porous tensioning are successively installed in that one end that prestressing force group's beam stretches out collar tie beam top surface
Anchorage is held, the steel strand wires of working cable in stretch-draw prestressing force group's beam carry out Underground Construction, right after the completion of Underground Construction
The steel strand wires of working cable carry out off-load, recycle the steel strand wires of tool rope, so that the steel strand wires of working cable are disanchored, people is used after disanchoring
The steel strand wires of power or admission machine recovery operation rope, so as to which in the construction stage of underground structure, pre- using working cable is answered
Power improves the crack resistance of fender post, reduces the regular reinforcement dosage of fender post, alleviates framework of steel reinforcement (the i.e. reinforcing bar of fender post
Cage) weight, and can be after the completion of Underground Construction, the easy recycling of the steel strand wires of implementation tool rope and working cable, and
Steel strand wires are not damaged in removal process, can be repeatedly used, and construction cost is reduced.
Detailed description of the invention
Fig. 1 is the knot of recyclable group's beam post-tensioning prestressing without bondn drill-pouring supporting pile structure of one embodiment of the invention
Structure schematic diagram (only illustrates one group of prestressing force group tread assembly) in figure.
Fig. 2 be one embodiment of the invention in fender post cross-sectional structure schematic diagram (i.e. the A-A schematic cross-sectional view of Fig. 1,
Illustrate the horizontal layout situation of all prestressing force group tread assemblies).
Fig. 3 is the portion the B enlarged diagram of Fig. 1.
Fig. 4 is the assembling schematic diagram of the porous fixing end anchorage in one embodiment of the invention.
Fig. 5 is the C-C schematic cross-sectional view of Fig. 4.
Fig. 6 is the structural schematic diagram of the porous stretching end anchorage in one embodiment of the invention.
Fig. 7 is the D-D schematic cross-sectional view of Fig. 6.
Fig. 8 is the structural schematic diagram of the locating rack in one embodiment of the invention.
Fig. 9 is the assembling schematic diagram of the locating rack and prestressing force group beam in one embodiment of the invention.
Figure 10 is the structural schematic diagram of the tensioning equipment in one embodiment of the invention.
Figure 11 is the structural schematic diagram of the relief arrangement in one embodiment of the invention.
Figure 12 is the assembling schematic diagram of porous fixing end anchorage in another embodiment in the present invention.
In figure: 1- prestressing force group beam, 110- working cable, the steel strand wires of 111- working cable, 112- working cable protecting pipe,
The outer anchor ring of 120- tool rope, the steel strand wires of 121- tool rope, the porous fixing end anchorage of protecting pipe, 2- of 122- tool rope, 21-,
Anchor block, 23- first clamping piece group, 24- pressure-bearing end plate, 25- seal bootr, 26- grease, 27- steel pipe socket connector, 3- positioning in 22-
Frame, 4- position bracket, 5- anchor plate, the porous stretching end anchorage of 6-, 61- tensioning anchor slab, 62- second intermediate plate group, 7- punching thousand
Jin top, 71- inner casing, 72- outer shell, 8- porous tool anchor, 81- tool anchor slab, 82- third intermediate plate group, 9- limit plate, 10- bracket,
11- fender post, 12- collar tie beam, 13- stir pile water stopping curtain, 14- underground structure, 15- spiral hoop, 16- nonprestressed reinforcement, 17-
Bearing plate, 18- spiral bar, 19- screw rod, 20- nut.
Specific embodiment
The present invention is described in further detail below in conjunction with the drawings and specific embodiments.It below will be by cited implementation
Example is in conjunction with attached drawing, the technology contents and feature that the present invention will be described in detail.Need in addition it illustrate, attached drawing is all made of very simplified
Form and use non-accurate ratio, only for the purpose of facilitating and clarifying the purpose of the embodiments of the invention.For narration side
Just, "upper" described below, "lower" are consistent with the upper and lower direction of attached drawing, but this can't be technical solution of the present invention
Limitation.
Embodiment one
Fig. 1 to Figure 11 is please referred to, a kind of recyclable group's beam post-tensioning prestressing without bondn drill-pouring is present embodiments provided
Supporting pile structure, including steel reinforcement cage and the prestressing force group's tread assembly being set on steel reinforcement cage, collar tie beam is arranged in the upper end of steel reinforcement cage
12, prestressing force group tread assembly is formed by prestressing force group beam 1 and the assembling of porous fixing end anchorage 2, the upper end of the prestressing force group beam 1
The top surface of collar tie beam 12 is stretched out, the lower end of the prestressing force group beam 1 is installed in the porous fixing end anchorage 2, each prestressing force
Group beam 1 include it is several for drill-pouring fender post 11 apply prestressed working cable 110 and for working cable 110 into
The tool rope 120 that row is disanchored, the working cable 110 are compassingly set at 120 outside of tool rope, the tool rope 120 and institute
Stating working cable 110 is linear type unbonded prestressing tendon, and the unbonded prestressing tendon includes steel strand wires and is sheathed on steel
Protecting pipe on the outside of twisted wire, porous fixing end anchorage 2 can anchor but also disanchor the steel strand wires 111 of working cable.
Recyclable group's beam post-tensioning prestressing without bondn drill-pouring supporting pile structure provided in this embodiment, in regular reinforcement
Concrete drill hole is perfused on the basis of fender post 11, is configured with prestressing force group beam 1, improves the crack resistance of stake, reduces common
Amount of reinforcement alleviates framework of steel reinforcement (i.e. steel reinforcement cage) weight.Prestressing force group beam 1 includes several for drill-pouring fender post
The prestressed working cable 110 of 11 applications and the tool rope 120 for disanchoring to working cable 110, the working cable 110 enclose
Around 120 outside of tool rope is set to, the tool rope 120 and the working cable 110 are linear type prestressing without bondn
Muscle, the unbonded prestressing tendon include steel strand wires and the protecting pipe that is sheathed on the outside of steel strand wires, the lower end of prestressing force group beam 1
The anchor that installation one can anchor but also disanchor presstressed reinforcing steel, so as to realize prestressing force group beam 1 steel strand wires letter
Just it recycles, and steel strand wires are not damaged in removal process, can repeatedly use, reduce construction cost.
Due to the bottom sediment of drill-pouring fender post be difficult to remove it is clean, in order to avoid porous fixing end anchorage 2 because
It is fallen into sediment in binding inaccuracy or in lifting, influences the anchoring effect of prestressing force group beam 1, it is preferred that in this implementation
In example, the lower part of the steel reinforcement cage is provided with the positioning bracket 4 for being used to support the porous fixing end anchorage 2, so that in advance
Stress group beam 1 is anchored in the concrete of denser homogeneous, improves anchoring effect.
In order to increase the integral strength of fender post 11, cracking resistance and performance is more uniform everywhere, it is preferred that above-mentioned
In recyclable group's beam post-tensioning prestressing without bondn drill-pouring supporting pile structure, the quantity of the prestressing force group beam 1 be it is multiple,
Even to be set on the steel reinforcement cage, the steel reinforcement cage is connect with several nonprestressed reinforcements 16 by spiral hoop 15 and is formed, non-pre- to answer
Power reinforcing bar 16 is uniformly arranged on the surrounding of the spiral hoop 15, and multiple prestressing force group beams 1 are uniformly arranged on the spiral hoop
15 surrounding.In the present embodiment, the quantity of the prestressing force group tread assembly is 6 groups, is uniformly arranged on the spiral of the steel reinforcement cage
On hoop 15.
In the present embodiment, the protecting pipe 112 of working cable is sheathed on 111 outside of steel strand wires of working cable；The sheath of tool rope
Pipe 122 is sheathed on 121 outside of steel strand wires of tool rope, and the protecting pipe 112 of working cable and the protecting pipe 122 of tool rope are using high
Density polyethylene materials are made, High Density Polyethylene, referred to as " HDPE ", and high density polyethylene (HDPE) is a kind of
Crystallinity height, nonpolar thermoplastic resin.Protecting pipe is made with acid and alkali-resistance by HDPE, organic solvent-resistant, electrical insulating property is excellent
Good advantage when low temperature, is still able to maintain certain toughness.And there is stronger surface hardness, tensile strength, the machinery such as rigidity is by force
Degree.
Preferably, described more in above-mentioned recyclable group's beam post-tensioning prestressing without bondn drill-pouring supporting pile structure
Hole fixing end anchorage 2 includes outer anchor ring 21, interior anchor block 22, first clamping piece group 23, pressure-bearing end plate 24 and seal bootr 25, described
The through-hole passed through for the steel strand wires 121 of working cable 110 and tool rope is correspondingly provided on pressure-bearing end plate 24, the outer anchor ring 21 is arranged
In the lower surface of the pressure-bearing end plate 24, the interior anchor block 22 is set to the outer anchor around the steel strand wires 121 of the tool rope
The inside of ring 21 forms the space for being used to accommodate first clamping piece group 23 between each interior anchor block 22 and outer anchor ring 21, described
The correspondence through-hole and interior anchor block 22 of the lower end of the steel strand wires 111 of working cable successively drawing-in steel bushing pipe connector, pressure-bearing end plate 24
The space for being used to accommodate first clamping piece group 23 between outer anchor ring 21, the first clamping piece group 23 include that at least two panels first is pressed from both sides
Piece, at least two panels first clamping piece are arranged around corresponding steel strand wires, and the first clamping piece group 23 is for accommodating the first folder
Doing compression processing in the space of piece group 23, the seal bootr 25 is set to the downside of the pressure-bearing end plate 24, the outer anchor ring 21,
The lower end of interior anchor block 22, first clamping piece group 23 and group's prestressing tendon is located in the seal bootr 25, note in the seal bootr 25
Enter grease 26, it is described for accommodating the sky of first clamping piece group 23 when interior anchor block 22 is located at the outside of the steel strand wires 121 of tool rope
Between for the first bellmouth up and down；When the steel strand wires 121 of the tool rope are pulled away interior anchor block 22, interior anchor block 22 with it is outer
The space of accommodating first clamping piece group 23 between anchor block becomes larger, so that first clamping piece group 23 loosens the steel strand wires 111 to working cable
Bite force realization disanchor.Therefore porous fixing end anchorage 2 using the above structure, tool rope can be fallen in withdrawing
Realize that the steel strand wires 111 of working cable are disanchored after steel strand wires 121, and anchoring and the process of disanchoring will not be to the steel strand wires of working cable
111 generate damage, are conducive to the recycling and reusing of steel strand wires.
Preferably, described to hold in above-mentioned recyclable group's beam post-tensioning prestressing without bondn drill-pouring supporting pile structure
The upper surface of pressure side plate 24 corresponds to each through-hole and is fixed with steel pipe socket connector 27, the protecting pipe of the unbonded prestressing tendon
It penetrates in corresponding steel bushing pipe connector, is connected the protecting pipe of unbonded prestressing tendon with corresponding steel sleeve using hydraulic device
Connector is connected.The length of the steel pipe socket connector 27 is 100-150mm, the length of steel pipe socket connector 27 in the present embodiment
Degree is 100mm.By the way that steel pipe socket connector 27 is arranged, and the protecting pipe of the unbonded prestressing tendon is penetrated into corresponding steel bushing
In pipe connector, the protecting pipe of unbonded prestressing tendon is connected with corresponding steel bushing pipe connector using hydraulic device,
It can protect steel strand wires, and can be by fixed sheath pipe, convenient for the tensioning, off-load and recycling of steel strand wires.
Preferably, it in above-mentioned recyclable group's beam post-tensioning prestressing without bondn drill-pouring supporting pile structure, is answering in advance
Anchor plate 5 and porous stretching end anchorage 6 are successively installed in that one end that power group beam 1 stretches out 12 top surface of collar tie beam, and the anchor plate 5 is set
It is placed in the top surface of collar tie beam 12, the porous stretching end anchorage 6 includes tensioning anchor slab 61 and several second intermediate plate groups 62, and described
It draws anchor slab 61 to be set to the upside of anchor plate 5, is correspondingly provided on the tensioning anchor slab 61 and is twisted for the steel of working cable 110 and tool rope
The second bellmouth that line 121 passes through corresponds to and is equipped with the second intermediate plate group 62, Mei Ge in the second bellmouth of working cable 110
Two intermediate plate groups 62 include at least two pieces of second intermediate plates, and at least two pieces of second intermediate plates are set around the steel strand wires 121 of tool rope
Outside, and the surface that the second intermediate plate is in contact with steel strand wires is equipped with sawtooth, second intermediate plate is moved out with respect to tensioning anchor slab 61
Loosen steel strand wires when dynamic, second intermediate plate stings tight steel strand wires when moving inward with respect to tensioning anchor slab 61.Pass through the porous of above structure
Stretching end anchorage 6 cooperates porous fixing end anchorage 2, and the stretching construction of the steel strand wires 111 of working cable may be implemented.
Preferably, in above-mentioned recyclable group's beam post-tensioning prestressing without bondn drill-pouring supporting pile structure, further include
The tensioning equipment of steel strand wires 111 for tensioning working cable, the tensioning equipment include the limit plate set gradually from the bottom to top
9, centre-hole jack 7 and porous tool anchor 8, the surrounding of the limit plate 9 have the support portion of evagination, the limit plate 9
It is set on porous tension ground tackle by the support portion, so that being equipped with gap between the limit plate 9 and porous tension ground tackle.
Gap is usually in 6mm hereinafter, limit plate 9 is used to limit the mobile space of second intermediate plate group 62, the upper end of the prestressing force group beam 1
Sequentially pass through limit plate 9, centre-hole jack 7 and porous tool anchor 8 from the bottom to top, when tensioning, control stress for prestressing is taken as
No more than the strength standard value of 0.70 times of steel strand wires.
Preferably, in above-mentioned recyclable group's beam post-tensioning prestressing without bondn drill-pouring supporting pile structure, further include
The relief arrangement of off-load is carried out for the steel strand wires 111 to working cable, the relief arrangement includes off-load bracket 10, punching thousand
Jin top 7 and porous tool anchor 8, the off-load bracket 10 are set between porous tension ground tackle and centre-hole jack 7.
In the present embodiment, emphasis refering to fig. 10, the centre-hole jack 7 in the tensioning equipment and relief arrangement, knot are asked
Structure is identical.Centre-hole jack 7 and high-pressure oil pump are used cooperatively, and power is provided by the high pressure oil of high-pressure oil pump.Punching
There is a punching duct along axis inside jack 7, the steel strand wires 121 of steel strand wires 111 and tool rope for working cable are worn
It crosses.There are two hydraulic cylinders, i.e. inner casing 71 and outer shell 72 for centre-hole jack 7.Since centre-hole jack 7 is skill commonly used in the art
Art means, therefore specific structure is herein without repeating.
In the present embodiment, emphasis refering to fig. 11, the tensioning equipment and the porous tool anchor structure phase in relief arrangement are asked
Together, the porous tool anchor includes tool anchor slab 81 and several third intermediate plate groups 82, is correspondingly provided on the tool anchor slab 81
For the third bellmouth that the steel strand wires 121 of working cable 110 and tool rope 120 pass through, in the third bellmouth of corresponding working cable 110
Equipped with the third intermediate plate group 82, each third intermediate plate group 82 includes at least two pieces of third intermediate plates, at least two pieces of third folders
Piece is set around the outside of the steel strand wires 111 of corresponding working cable, and the surface that the third intermediate plate is in contact with steel strand wires is equipped with saw
Tooth.
Please continue to refer to Fig. 1 to Figure 11, the invention also discloses recyclable group's beam post-tensioning soap-free emulsion polymeizations as described above to answer in advance
The construction method of power drill-pouring supporting pile structure, comprising:
Prestressing force group's tread assembly, the prestressing force group beam 1 are formed to prestressing force group beam 1 and the assembling of porous fixing end anchorage 2
Lower end be installed in the porous fixing end anchorage 2, each prestressing force group beam 1 includes several for drill-pouring fender post
The prestressed working cable 110 of 11 applications and the tool rope 120 for disanchoring to working cable 110, the working cable 110 enclose
Around 120 outside of tool rope is set to, the tool rope 120 and the working cable 110 are linear type prestressing without bondn
Muscle, the unbonded prestressing tendon include steel strand wires and the protecting pipe that is sheathed on the outside of steel strand wires, the porous fixing end anchor
The steel strand wires 111 that tool 2 can anchor but also disanchor working cable；
Several prestressing force group tread assemblies are installed on steel reinforcement cage；
It will be equipped in the reinforcing bar cage hoisting to the stake holes for excavating completion of several prestressing force group tread assemblies；
It pours stake holes concrete and forms drill-pouring fender post 11；
After collar tie beam 12 reaches design strength, collar tie beam 12 is poured above drill-pouring fender post 11；
After collar tie beam 12 reaches design strength, anchor pad is successively installed in that one end that prestressing force group beam 1 stretches out 12 top surface of collar tie beam
Plate 5 and porous stretching end anchorage 6；
The steel strand wires 111 of working cable in stretch-draw prestressing force group beam 1；
Underground structure 14 is carried out to construct,
After the completion of underground structure 14 is constructed, off-load is carried out to the steel strand wires 111 of working cable；
The steel strand wires 121 of recycling tool rope, so that the steel strand wires 111 of working cable are disanchored；
Using manpower or the steel strand wires 111 of admission machine recovery operation rope after disanchoring.
The construction method of recyclable group's beam post-tensioning prestressing without bondn drill-pouring supporting pile structure provided by the invention is led to
It crosses and several prestressing force group tread assemblies is installed on steel reinforcement cage, by the reinforcing bar cage hoisting for being equipped with several prestressing force group tread assemblies to opening
It digs in the stake holes completed, pours stake holes concrete and form drill-pouring fender post, pour collar tie beam above drill-pouring fender post
12, after collar tie beam 12 reaches design strength, prestressing force group beam 1 stretch out 12 top surface of collar tie beam that one end successively install anchor plate 5 with
And porous stretching end anchorage 6, the steel strand wires 111 of working cable in stretch-draw prestressing force group beam 1 carry out underground structure 14 and construct, underground
After the completion of structure 14 is constructed, off-load is carried out to the steel strand wires 111 of working cable, the steel strand wires 121 of tool rope are recycled, so that working cable
Steel strand wires 111 disanchor, using the steel strand wires 111 of manpower or admission machine recovery operation rope after disanchoring, so as in underground
The construction stage of structure 14 is improved the crack resistance of fender post 11 using the prestressing force of the steel strand wires 111 of working cable, reduces and go along with sb. to guard him
The regular reinforcement dosage of stake 11, alleviates framework of steel reinforcement (i.e. steel reinforcement cage) weight of fender post 11, and can be in underground structure
After the completion of 14 constructions, the easy recycling of the steel strand wires of implementation tool rope 120 and working cable 110, and steel strand wires are not in removal process
It will receive damage, can repeatedly use, reduce construction cost.
Preferably, in above-mentioned recyclable group's beam post-tensioning prestressing without bondn drill-pouring supporting pile structure, when recycling,
First apply pulling capacity with the steel strand wires 121 of preceding cassette punching jack pair tool rope, the steel strand wires 121 of tool rope is pulled away porous
Fixing end anchorage 2, the appearance when the steel strand wires 121 of the tool rope are pulled away interior anchor block 22, between interior anchor block 22 and outer anchor block
The space for setting first clamping piece group 23 becomes larger, so that first clamping piece group 23 loosens the bite force realization to the steel strand wires 111 of working cable
It disanchors, so as to subsequent recycling and reusing, the steel of working cable is twisted to be realized while recycling steel strand wires 121 of tool rope
Line 111 is disanchored；Using manpower or the steel strand wires 111 of admission machine recovery operation rope after disanchoring.Further, since tool rope 120
It is linear type with the working cable 110, therefore, recycling resistance is smaller, and the easy recycling of steel strand wires may be implemented.
Embodiment two
Please refer to Figure 12, and in combination with Fig. 1 to Figure 11, the difference between this embodiment and the first embodiment lies in: above-mentioned can
It recycles in group's beam post-tensioning prestressing without bondn drill-pouring supporting pile structure, further includes bearing plate 17, spiral bar 18, several screw rods
19 and several nuts 20, the through-hole passed through for working cable 110, tool rope 120 and screw rod 19 is opened up on the bearing plate 17,
The bearing plate 17 is arranged at intervals at the top of the porous fixing end anchorage 2 by the screw rod 19 and nut 20, described
Spiral bar 18 is between the bearing plate 17 and porous fixing end anchorage 2.The screw rod 19 can play power transmission and connection
Effect, spiral bar 18 plays the role of increasing bearing capacity, using structure as above, steel strand wires 111 of the bearing plate 17 in working cable
I.e. after tension of prestressed tendon, the buffer brake that presstressed reinforcing steel generates is dispersed, prevents from locally holding because of 11 concrete of fender post
Pressure scarce capacity leads to fastening invalidation.
In conclusion recyclable group's beam post-tensioning prestressing without bondn drill-pouring supporting pile structure provided by the invention and side
Method is configured with prestressing force group's beam, improves the crack resistance of stake on the basis of ordinary reinforced concrete drill-pouring fender post,
Reduce regular reinforcement dosage, alleviates framework of steel reinforcement (i.e. steel reinforcement cage) weight.Prestressing force group's beam includes several for drilling
Perfusion fender post applies prestressed working cable and the tool rope for disanchoring to working cable, and the working cable is surrounded and set
It is placed on the outside of the tool rope, the tool rope and the working cable are linear type unbonded prestressing tendon, the soap-free emulsion polymeization
Presstressed reinforcing steel includes steel strand wires and the protecting pipe that is sheathed on the outside of steel strand wires, and the lower end installation one of prestressing force group's beam can anchor
Can disanchor the anchor of presstressed reinforcing steel again, so as to realize prestressing force group's beam steel strand wires easy recycling, and recycled
Steel strand wires are not damaged in journey, can be repeatedly used, and construction cost is reduced.
Foregoing description is only the description to present pre-ferred embodiments, not to any restriction of the scope of the invention, this hair
Any change, the modification that the those of ordinary skill in bright field does according to the disclosure above content, belong to the protection of claims
Range.
Claims (10)
1. a kind of recyclable group's beam post-tensioning prestressing without bondn drill-pouring supporting pile structure, which is characterized in that including steel reinforcement cage
And it is set to prestressing force group's tread assembly on steel reinforcement cage, collar tie beam is arranged in the upper end of steel reinforcement cage, and prestressing force group tread assembly by answering in advance
Power group beam assembles to be formed with porous fixing end anchorage, and the top surface of collar tie beam, the prestressing force are stretched out in the upper end of the prestressing force group beam
The lower end of group's beam is installed in the porous fixing end anchorage, and each prestressing force group beam includes several for going along with sb. to guard him to drill-pouring
Stake applies prestressed working cable and the tool rope for disanchoring to working cable, and the working cable is compassingly set at described
On the outside of tool rope, the tool rope and the working cable are linear type unbonded prestressing tendon, the unbonded prestressing tendon
Including steel strand wires and the protecting pipe being sheathed on the outside of steel strand wires, porous fixing end anchorage can be anchored but also disanchor working cable
Steel strand wires.
2. recyclable group's beam post-tensioning prestressing without bondn drill-pouring supporting pile structure, feature exist as described in claim 1
Be in the quantity of, the prestressing force group beam it is multiple, be uniformly arranged on the steel reinforcement cage, the steel reinforcement cage by spiral hoop with it is several
Nonprestressed reinforcement connection composition, multiple prestressing force group beams are uniformly arranged on the surrounding of the spiral hoop.
3. recyclable group's beam post-tensioning prestressing without bondn drill-pouring supporting pile structure, feature exist as described in claim 1
In, the porous fixing end anchorage include outer anchor ring, interior anchor block, first clamping piece group, pressure-bearing end plate and seal bootr, it is described to hold
The through-hole passed through for the steel strand wires of working cable and tool rope is correspondingly provided on pressure side plate, the outer anchor ring is set to the compression end
The lower surface of plate, the interior anchor block are set to the inside of the outer anchor ring, each interior anchor block around the steel strand wires of the tool rope
One is formed between outer anchor ring for accommodating the space of first clamping piece group, the lower end of the steel strand wires of the working cable successively drawing-in
Steel bushing pipe connector, pressure-bearing end plate correspondence through-hole and interior anchor block and outer anchor ring between for accommodating the sky of first clamping piece group
Between, the first clamping piece group includes that at least two panels first clamping piece, at least two panels first clamping piece is set around corresponding steel strand wires
It sets, the first clamping piece group does compression processing in the space for accommodating first clamping piece group, and the seal bootr is set to described
The downside of pressure-bearing end plate, the outer anchor ring, interior anchor block, first clamping piece group and group's prestressing tendon lower end be located at the seal bootr
It is interior, grease is injected in the seal bootr, it is described for accommodating the first folder when interior anchor block is located at the outside of the steel strand wires of tool rope
The space of piece group is the first bellmouth up and down；When the steel strand wires of the tool rope are pulled away interior anchor block, interior anchor block with
The space of accommodating first clamping piece group between outer anchor block becomes larger, so that first clamping piece group loosens the occlusion to the steel strand wires of working cable
Power realization is disanchored.
4. recyclable group's beam post-tensioning prestressing without bondn drill-pouring supporting pile structure, feature exist as claimed in claim 3
In the upper surface of the pressure-bearing end plate corresponds to each through-hole and is fixed with steel pipe socket connector, the unbonded prestressing tendon
Protecting pipe penetrates in corresponding steel bushing pipe connector, using hydraulic device by the protecting pipe of unbonded prestressing tendon and corresponding steel
Casing connection head is connected.
5. recyclable group's beam post-tensioning prestressing without bondn drill-pouring supporting pile structure, feature exist as described in claim 1
In, prestressing force group's beam stretch out collar tie beam top surface that one end anchor plate and porous stretching end anchorage, the anchor pad are successively installed
Plate is set to the top surface of collar tie beam, and the porous stretching end anchorage includes tensioning anchor slab and several second intermediate plate groups, the tensioning
Anchor slab is set to the upside of anchor plate, and passed through for the steel strand wires of working cable and tool rope is correspondingly provided on the tensioning anchor slab
Two bellmouths correspond to and are equipped with the second intermediate plate group in the second bellmouth of working cable, and each second intermediate plate group includes at least two
Block second intermediate plate, at least two pieces of second intermediate plates are set around the outside of the steel strand wires of tool rope, and the second intermediate plate and steel
The surface that twisted wire is in contact is equipped with sawtooth, and second intermediate plate loosens steel strand wires, second intermediate plate phase when being displaced outwardly with respect to tensioning anchor slab
Tight steel strand wires are stung when moving inward to tensioning anchor slab.
6. recyclable group's beam post-tensioning prestressing without bondn drill-pouring supporting pile structure, feature exist as claimed in claim 5
In further including the tensioning equipment for the steel strand wires of tensioning working cable, the tensioning equipment includes setting gradually from the bottom to top
Limit plate, centre-hole jack and porous tool anchor, the surrounding of the limit plate have the support portion of evagination, the limit plate
It is set on porous tension ground tackle by the support portion, so that being equipped with gap between the limit plate and porous tension ground tackle.
7. recyclable group's beam post-tensioning prestressing without bondn drill-pouring supporting pile structure, feature exist as claimed in claim 5
In, further include for working cable steel strand wires carry out off-load relief arrangement, the relief arrangement includes off-load bracket, punching
Formula jack and porous tool anchor, the off-load bracket are set between porous tension ground tackle and centre-hole jack.
8. recyclable group's beam post-tensioning prestressing without bondn drill-pouring supporting pile structure, feature exist as described in claim 1
In the lower part of the steel reinforcement cage is provided with the positioning bracket for being used to support the porous fixing end anchorage.
9. recyclable group's beam post-tensioning prestressing without bondn drill-pouring fender post knot as described in any one of claim 1-8
Structure, which is characterized in that further include bearing plate, spiral bar, several screw rods and several nuts, opened up on the bearing plate for work
The through-hole that rope, tool rope and screw rod pass through, the bearing plate are arranged at intervals at described porous by the screw rod and nut
The top of fixing end anchorage, the spiral bar is between the bearing plate and porous fixing end anchorage.
10. a kind of group's beam post-tensioning prestressing without bondn drill-pouring recyclable as in one of claimed in any of claims 1 to 9 encloses
The construction method of fender pile structure characterized by comprising
Prestressing force group beam and porous fixing end anchorage are assembled to form prestressing force group's tread assembly, the lower end peace of the prestressing force group beam
Loaded in the porous fixing end anchorage, each prestressing force group beam includes several for applying prestressing force to drill-pouring fender post
Working cable and tool rope for disanchoring to working cable, the working cable be compassingly set on the outside of the tool rope,
The tool rope and the working cable are linear type unbonded prestressing tendon, the unbonded prestressing tendon include steel strand wires with
And it is sheathed on the protecting pipe on the outside of steel strand wires, the porous fixing end anchorage can anchor but also disanchor the steel strand wires of working cable；
Several prestressing force group tread assemblies are installed on steel reinforcement cage；
It will be equipped in the reinforcing bar cage hoisting to the stake holes for excavating completion of several prestressing force group tread assemblies；
It pours stake holes concrete and forms drill-pouring fender post；
After collar tie beam reaches design strength, collar tie beam is poured above drill-pouring fender post；
After collar tie beam reaches design strength, anchor plate and porous is successively installed in that one end that prestressing force group's beam stretches out collar tie beam top surface
Stretching end anchorage；
The steel strand wires of working cable in stretch-draw prestressing force group's beam；
Underground Construction is carried out,
After the completion of Underground Construction, off-load is carried out to the steel strand wires of working cable；
The steel strand wires of recycling tool rope, so that the steel strand wires of working cable are disanchored；
Using manpower or the steel strand wires of admission machine recovery operation rope after disanchoring.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810568767.2A CN109024570A (en) | 2018-06-05 | 2018-06-05 | Recyclable group's beam post-tensioning prestressing without bondn drill-pouring supporting pile structure and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810568767.2A CN109024570A (en) | 2018-06-05 | 2018-06-05 | Recyclable group's beam post-tensioning prestressing without bondn drill-pouring supporting pile structure and method |
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| CN109024570A true CN109024570A (en) | 2018-12-18 |
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| CN109706922A (en) * | 2019-02-25 | 2019-05-03 | 浙江中桥预应力设备有限公司 | Using the steel reinforcement cage of Recyclable anchor rope, foundation pit enclosure stake and construction method |
| CN110578325A (en) * | 2019-08-27 | 2019-12-17 | 上海建工集团股份有限公司 | Recoverable prestress drilling and pouring fender post and construction method thereof |
| CN113585289A (en) * | 2021-09-18 | 2021-11-02 | 中冶建工集团有限公司 | Support method for collapse soil deep foundation pit |
| CN113863291A (en) * | 2021-10-21 | 2021-12-31 | 中建三局集团有限公司 | Novel construction method of unbonded prestressed poured uplift pile |
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| US20080008539A1 (en) * | 2006-07-05 | 2008-01-10 | Con-Tech Systems Ltd. | Void form for constructing post-tensioned foundation piles |
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| CN109706922A (en) * | 2019-02-25 | 2019-05-03 | 浙江中桥预应力设备有限公司 | Using the steel reinforcement cage of Recyclable anchor rope, foundation pit enclosure stake and construction method |
| CN110578325A (en) * | 2019-08-27 | 2019-12-17 | 上海建工集团股份有限公司 | Recoverable prestress drilling and pouring fender post and construction method thereof |
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| CN113585289A (en) * | 2021-09-18 | 2021-11-02 | 中冶建工集团有限公司 | Support method for collapse soil deep foundation pit |
| CN113863291A (en) * | 2021-10-21 | 2021-12-31 | 中建三局集团有限公司 | Novel construction method of unbonded prestressed poured uplift pile |
| CN113863291B (en) * | 2021-10-21 | 2023-03-03 | 中建三局集团有限公司 | Construction method of unbonded prestressed poured uplift pile |
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Effective date of registration: 20200324 Address after: 200120 Pudong New Area, Shanghai, China (Shanghai) free trade pilot area 33 Fukuyama Road Applicant after: SHANGHAI CONSTRUCTION GROUP Co.,Ltd. Applicant after: SHANGHAI CONSTRUCTION EQUIPMENT ENGINEERING Co.,Ltd. Address before: 200120 Pudong New Area, Shanghai, China (Shanghai) free trade pilot area 33 Fukuyama Road Applicant before: SHANGHAI CONSTRUCTION GROUP Co.,Ltd. |
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Application publication date: 20181218 |