CN104343115B - A kind of pile foundation pile crown entirety abolishes structures and methods - Google Patents

A kind of pile foundation pile crown entirety abolishes structures and methods Download PDF

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Publication number
CN104343115B
CN104343115B CN201410638883.9A CN201410638883A CN104343115B CN 104343115 B CN104343115 B CN 104343115B CN 201410638883 A CN201410638883 A CN 201410638883A CN 104343115 B CN104343115 B CN 104343115B
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pipe
main
pile
muscle
pile foundation
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CN104343115A (en
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王秀申
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CCCC Tunnel Engineering Co Ltd
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CCCC Tunnel Engineering Co Ltd
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    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D9/00Removing sheet piles bulkheads, piles, mould-pipes or other moulds or parts thereof
    • E02D9/005Removing sheet piles bulkheads, piles, mould-pipes or other moulds or parts thereof removing the top of placed piles of sheet piles

Abstract

The present invention relates to a kind of pile foundation pile crown entirety and abolish structures and methods, including the main muscle of the steel reinforcement cage in pile foundation and pile foundation, sound detecting pipe, main muscle at steel reinforcement cage is set with main tendon bush higher than design pile body end face with epimere, is provided with space between the external diameter and the internal diameter of main tendon bush of main muscle;Being set with sounding sleeve pipe on sound detecting pipe, the position ring at pile crown line of cut is provided with separation pipe around the main muscle of steel reinforcement cage, separates pipe and includes flexible outer tube and the interior muscle being through in flexible outer tube endoporus;After pile foundation has poured, from separating, pipe is extracted muscle out, bore many from hole and by separation chock insertion sorting hole, tap pile foundation and make pile crown separate with design pile body end face generation;The invention has the beneficial effects as follows: be no longer necessary to search sound detecting pipe and pile foundation steel bar cage main muscle position in pile foundation, it is to avoid damage and destruction to main muscle in abolishing construction;Pile crown structure after abolishing is smooth.

Description

A kind of pile foundation pile crown entirety abolishes structures and methods
Technical field
The invention belongs to building pile foundation cast-in-situ bored pile, particularly relate to a kind of pile foundation pile crown entirety and abolish structures and methods.
Background technology
The pile foundation of armored concrete needs to abolish pile crown after having poured, and the reinforcing bar of reservation pile crown and sound detecting pipe also make it expose.Method abolished by common pile crown is the construction manually cut: this method is after cushion cap has excavated, artificial main muscle and the sound detecting pipe first digging out steel reinforcement cage with pneumatic pick, then pile crown separation is carried out, big machinery is used to be sling by pile crown again, this method is disadvantageous in that: sound detecting pipe not easy-to-search, fairly time consuming;When digging out main muscle and the sound detecting pipe of steel reinforcement cage slow, inefficient;Bigger to the damage of main muscle;Pile crown after abolishing is uneven, and has certain destruction to pile foundation.
Summary of the invention
The purpose of the present invention is to propose to a kind of pile foundation pile crown entirety and abolish the technical scheme of structures and methods.Make pile crown abolish conveniently, efficiently, it is to avoid the damage and failure to main muscle, ensure construction safety.
To achieve these goals, the technical scheme is that a kind of pile foundation pile crown entirety abolishes structure, including the main muscle of the steel reinforcement cage in pile foundation and pile foundation, sound detecting pipe, after pile foundation has poured, the pile crown of pile foundation separates with pile foundation at design pile body end face, and the position of the design pile body end face of pile foundation is pile crown line of cut;Main muscle at described steel reinforcement cage is set with main tendon bush higher than design pile body end face with epimere, is provided with space between the external diameter and the internal diameter of main tendon bush of main ribs;Described sound detecting pipe is set with sounding sleeve pipe, between the external diameter and the internal diameter of sounding sleeve pipe of sound detecting pipe, is provided with space;The lower end of the main tendon bush being enclosed within main muscle is less than described pile crown line of cut;Position ring at pile crown line of cut is provided with separation pipe around the main muscle of steel reinforcement cage, and described separation pipe includes flexible outer tube and the interior muscle being through in flexible outer tube endoporus.
Further, main ribs sleeve pipe and sounding sleeve pipe are PE pipes;Between the external diameter and the internal diameter of main tendon bush of main ribs, it is provided with the space not less than 5mm, between the external diameter and the internal diameter of sounding sleeve pipe of described sound detecting pipe, is provided with the space not less than 5mm;
In the space between the external diameter and the internal diameter of main tendon bush of main ribs, there is void filler, between the external diameter and the internal diameter of sounding sleeve pipe of described sound detecting pipe, also have described void filler;Void filler includes plastic foil, foamed glue.
Further, higher than the upper end of main ribs, there is apex filler the upper end of main ribs sleeve pipe in the main tendon bush pipeline section higher than main muscle upper end;, higher than the upper end of described sound detecting pipe, also there is described apex filler the upper end of described sounding sleeve pipe in the sounding sleeve pipe pipeline section higher than sound detecting pipe upper end;Described apex filler includes foamed glue;
It is provided with between lower end and the main muscle of main tendon bush for fixing main tendon bush and closing the sealant tape in gap between main tendon bush and main muscle, is provided with between lower end and the sound detecting pipe of sounding sleeve pipe for fixing sounding sleeve pipe and closing the sealant tape in gap between sounding sleeve pipe and sound detecting pipe.
Further, the upper end of main ribs sleeve pipe is higher than the upper end 75mm of main ribs, and the upper end of described sounding sleeve pipe is higher than the upper end 75mm of described sound detecting pipe;The lower end of main tendon bush is less than described pile crown line of cut 25mm, and the lower end of described sounding sleeve pipe is less than described pile crown line of cut 25mm.
Further, it is provided with two security strips preventing rising of steel cage from causing separating the skew of pipe position at described steel reinforcement cage bottom position;Described security strip is welded to the wide 50mm of steel reinforcement cage lower end, the steel plate of thick 5mm, and two security strips become right-angled intersection to arrange.
Further, the flexible outer tube of described separation pipe is rubber tube, and described interior muscle is steel wire rope, is provided with space between the internal diameter and the external diameter of interior muscle of flexible outer tube, and the space between described flexible outer tube and interior muscle is 5mm~10mm, is filled with fine sand in space.
Further, the two ends of described separation pipe are provided with the sealant tape for blocking termination;Separate pipe to be banded on main ribs sleeve pipe, can be moved in flexible outer tube by the interior muscle separated in pipe after colligation;Separate pipe and be provided with the extension extended to pile foundation outer wall direction in end.
A kind of pile foundation pile crown entirety restructuring bankrupt, described method uses a kind of pile foundation pile crown entirety described in claim 1 to abolish structure, being separated with pile foundation from design pile body end face by the pile crown of pile foundation, the position of the design pile body end face of pile foundation is pile crown line of cut;It is characterized in that, the step of described method includes:
A. determine main ribs sleeve pipe and the length of sounding sleeve pipe according to the position of steel reinforcement cage main muscle upper end and the pile crown line of cut of pile foundation and cut main tendon bush and sounding sleeve pipe;
B. need set to become owner of described void filler is set on the length section of tendon bush at main muscle, need at sound detecting pipe to be inserted on the length section of sounding sleeve pipe void filler is set;
C. main tendon bush step a cut is inserted in the main muscle being provided with void filler by step b, the lower end of the main tendon bush being enclosed within main muscle is less than described pile crown line of cut, it is wound around sealant tape in the lower end of main tendon bush, makes the gap between main tendon bush and main muscle be sealed and make main tendon bush be fixed on main muscle;Sounding sleeve pipe step a cut is inserted in the sound detecting pipe being provided with void filler by step b, the lower end of the sounding sleeve pipe being enclosed within sound detecting pipe is not higher than described pile crown line of cut, it is wound around sealant tape in the lower end of sounding sleeve pipe, makes the gap between sounding sleeve pipe and sound detecting pipe be sealed and make sounding sleeve pipe be fixed on sound detecting pipe;
D. flexible outer tube and the muscle of described separation pipe is cut according to the length enclosed around steel reinforcement cage main muscle one and described extension, interior muscle is penetrated in the endoporus of flexible outer tube, filling fine sand in the space between flexible outer tube and interior muscle, the two ends sealant tape separating pipe seals;
That e. step d is made separates pipe at pile crown line of cut position ring around the steel reinforcement cage being cased with main tendon bush main muscle one circle, separate pipe and the extension extended to pile foundation outer wall direction is set at two ends joining place, use steel wire will to separate pipe colligation on the external diameter of main tendon bush, controlling colligation dynamics during colligation, the interior muscle separated in pipe after enabling by colligation moves in flexible outer tube;
F. to pile foundation casting concrete, pouring of concrete highly exceedes the position separating pipe, is labeled, when concreting, the two ends junction separating pipe;
G. after pile foundation concrete reaches hardness requirement, excavation pile foundation makes pile crown line of cut expose with upper bit, mark according to the step f two ends junction to separating pipe, the concrete of the two ends junction of hammering separation pipe, makes the two ends junction of separation pipe expose the extension separating pipe;Remove, in the termination of extension, the sealant tape being wound around, from separating, pipe is extracted muscle out.
H. using rock drill to bore multiple sorting holes around pile foundation to vertical pile body direction along separating pipe position ring in pile foundation, the degree of depth of described sorting hole is not less than the 1/5 of stake footpath;Then will separate in chock insertion sorting hole, tap pile foundation along the position separating pipe, until pile crown separates with design pile body end face generation at sorting hole;
i. Hang out the top pile crown separated with pile foundation pile body, main tendon bush and sounding sleeve pipe together to be hung out with described top pile crown;
Further, in step a, it is provided with two security strips preventing rising of steel cage from causing separating the skew of pipe position at described steel reinforcement cage bottom position;Described security strip be security strip be width be 50mm, thickness be the steel plate of 5mm, two security strips become right-angled intersection to arrange, vertical main muscle direction, security strip width face;
In stepb, the internal layer of the described void filler arranged with sound detecting pipe in main ribs is wrapped around main muscle and the plastic foil of sound detecting pipe external diameter, at plastic foil trypsin method foamed glue;
Main tendon bush is after muscle become owner of by set, and the upper end of main tendon bush is higher than the upper end of main muscle, in step c, and filling-foam glue in the main tendon bush pipeline section higher than main muscle upper end;Described sounding sleeve pipe is after being inserted in sound detecting pipe, and the upper end of sounding sleeve pipe is higher than the upper end of sound detecting pipe, in step c, and filling-foam glue in the sounding sleeve pipe pipeline section higher than sound detecting pipe upper end;
In step c, the length that main tendon bush is wound around by sealant tape is not less than 50mm, is wound around the number of turns and is not less than 50mm not less than 5 circles, the length that the main muscle of main tendon bush lower end is wound around by sealant tape, is wound around the number of turns not less than 5 circles;The length that the lower end of sounding sleeve pipe is wound around by sealant tape is not less than 50mm, is wound around the number of turns and is not less than 50mm not less than 5 circles, the length that the sound detecting pipe of sounding its lower end is wound around by sealant tape, is wound around the number of turns not less than 5 circles.
Further, in step h, the quantity of sorting hole is no less than 6.
The invention has the beneficial effects as follows: be no longer necessary to search sound detecting pipe and pile foundation steel bar cage main muscle position in pile foundation, it is to avoid damage and destruction to main muscle in abolishing construction;Pile crown structure after abolishing is smooth, and integral hoisting the most manually to cut method safer, reliable, it is to avoid casualties.
With embodiment, the present invention is described in detail below in conjunction with the accompanying drawings.
Accompanying drawing explanation
Fig. 1 is present configuration figure, and because accompanying drawing breadth limits, steel reinforcement cage is compressed in short transverse;
Fig. 2 is the main muscle of steel reinforcement cage of the present invention and the sound detecting pipe location drawing;
Fig. 3 is the main muscle of the present invention, main tendon bush, separation tubular construction figure;
Fig. 4 is the present invention main tendon bush top junction composition;
Fig. 5 is the present invention main tendon bush chart at the bottom of.
Detailed description of the invention
Such as Fig. 1 to Fig. 5, a kind of pile foundation pile crown entirety abolishes structure, including the main muscle of the steel reinforcement cage in pile foundation and pile foundation 11, sound detecting pipe 12, after pile foundation has poured, the pile crown 14 of pile foundation 13 separates with pile foundation at design pile body end face, and the position of the design pile body end face of pile foundation is pile crown line of cut 15;Expose at described steel reinforcement cage and on the main muscle of cushion cap, be set with main tendon bush 20, between the external diameter and the internal diameter of main tendon bush of main ribs, be provided with space;Described sound detecting pipe is set with sounding sleeve pipe 30, between the external diameter and the internal diameter of sounding sleeve pipe of sound detecting pipe, is provided with space;The lower end of the main tendon bush being enclosed within main muscle is less than described pile crown line of cut;Position ring at pile crown line of cut is provided with separation pipe 40 around the main muscle of steel reinforcement cage, and described separation pipe includes flexible outer tube 41 and the interior muscle 42 being through in flexible outer tube endoporus.
In order to enable main tendon bush to depart from main muscle smoothly, main ribs sleeve pipe and sounding sleeve pipe generally use PE to manage;Between the external diameter and the internal diameter of main tendon bush of main ribs, it is provided with the space not less than 5mm, between the external diameter and the internal diameter of sounding sleeve pipe of described sound detecting pipe, is provided with the space not less than 5mm.
In order to enable main tendon bush to be stably enclosed within main muscle, in the space between the external diameter and the internal diameter of main tendon bush of main ribs, there is void filler 21, between the external diameter and the internal diameter of sounding sleeve pipe of described sound detecting pipe, also have described void filler;Void filler includes plastic foil, foamed glue.Void filler can also avoid main tendon bush directly to contact with main muscle, also avoids sounding sleeve pipe directly to contact with sound detecting pipe, makes pile crown main tendon bush when being lifted slide smoothly along main muscle.
In order to prevent main muscle upper end from contacting with concrete, higher than the upper end of main ribs, there is apex filler 22 upper end of main ribs sleeve pipe in the main tendon bush pipeline section higher than main muscle upper end;, higher than the upper end of described sound detecting pipe, also there is described apex filler the upper end of described sounding sleeve pipe in the sounding sleeve pipe pipeline section higher than sound detecting pipe upper end;Described apex filler includes foamed glue;
There is sealant tape 23 seal and fix between lower end and the main muscle of main tendon bush, have sealant tape to seal between lower end and the sound detecting pipe of sounding sleeve pipe and fix.Concrete grout can be avoided from lower end while fixing main tendon bush and sounding sleeve pipe to penetrate into main tendon bush and sounding sleeve pipe.
It is provided with two security strips 16 preventing rising of steel cage from causing separating the skew of pipe position at described steel reinforcement cage bottom position.
In order to enable interior muscle successfully to extract out from flexible outer tube, being provided with space between the internal diameter and the external diameter of interior muscle of flexible outer tube, the space between described flexible outer tube and interior muscle is 5mm~10mm, is filled with fine sand 43 in space.
The two ends of described separation pipe are provided with the sealant tape for blocking termination;Separate pipe to be banded on main ribs sleeve pipe, can be moved in flexible outer tube by the interior muscle separated in pipe after colligation;Separate pipe and be provided with the extension 44 extended to pile foundation outer wall direction in end.
Embodiment one:
Such as Fig. 1 to Fig. 5, a kind of pile foundation pile crown entirety abolishes structure, including the main muscle of the steel reinforcement cage in pile foundation and pile foundation 11, sound detecting pipe 12, after pile foundation has poured, the pile crown of pile foundation separates with pile foundation at design pile body end face, and the position of the design pile body end face of pile foundation is pile crown line of cut 15.Pile foundation is the Reinforced Concrete Circular Cylinder body of a diameter of D1=1500mm, and steel reinforcement cage is provided with 30 main muscle, and main muscle is the reinforcing bar of diameter 25mm, and main muscle is R1=690mm along the cylindrical circle distribution of pile foundation, the distribution radius of circle at Zhu Jin center;Having 3 sound detecting pipes symmetrical with the center line of pile foundation, the distance of every sound detecting pipe to pile foundation center line is R2=500mm, and sound detecting pipe uses the steel pipe of latus rectum DN50;Design requires that main muscle and sound detecting pipe exceed design pile body end face (i.e. exceeding pile crown line of cut) L0=1000mm.
Expose at described steel reinforcement cage and on the main muscle of cushion cap, be set with main tendon bush 20, main ribs sleeve pipe be internal diameter be 35mm PE pipe;The space of 5mm is had between the external diameter and the internal diameter of main tendon bush of main muscle;The a length of 1100mm of main tendon bush, after muscle become owner of by main tendon bush set, the upper end of main tendon bush is less than pile crown line of cut L3=25mm higher than the upper end L1=75mm of main ribs, the lower end of main tendon bush.Void filler 21 is had in the space between the external diameter and the internal diameter of main tendon bush of main muscle, the void filler that the present embodiment uses is plastic foil and foamed glue, described plastic foil is wrapped on main muscle external diameter, and blend compounds band is fixed on main muscle, at plastic foil trypsin method foamed glue.Apex filler 22 is had in the main tendon bush pipeline section higher than main muscle upper end;Apex filler in the present embodiment is foamed plastic.It is provided with between lower end and the main muscle of main tendon bush for fixing main tendon bush and closing the sealant tape 23 in gap between main tendon bush and main muscle.
Described sound detecting pipe is set with sounding sleeve pipe 30, sound detecting pipe be external diameter be the steel pipe of 50mm.Described sounding sleeve pipe be internal diameter be 60mm PE pipe, between the external diameter and the internal diameter of sounding sleeve pipe of sound detecting pipe, have the space of 5mm;The a length of 1100mm of sounding sleeve pipe, after sounding casing pipe sleeve enters sound detecting pipe, the upper end of sounding sleeve pipe is less than described line of cut 25mm higher than the upper end 75mm of described sound detecting pipe, the lower end of sounding sleeve pipe.Void filler 21 is had in the space between the external diameter and the internal diameter of sounding sleeve pipe of sound detecting pipe, the void filler that the present embodiment uses is plastic foil and foamed glue, described plastic foil is wrapped on sound detecting pipe external diameter, and blend compounds band is fixed on sound detecting pipe, at plastic foil trypsin method foamed glue.Apex filler 22 is had in the sounding sleeve pipe pipeline section higher than sound detecting pipe upper end;Apex filler in the present embodiment is foamed plastic.It is provided with between lower end and the sound detecting pipe of sounding sleeve pipe for fixing sounding sleeve pipe and closing the sealant tape in gap between sounding sleeve pipe and sound detecting pipe.Sounding sleeve pipe is identical with the architectural feature of main tendon bush and main muscle with the architectural feature of sound detecting pipe, marks as accompanying drawing.
Position ring at pile crown line of cut is provided with separation pipe 40 around the main muscle of steel reinforcement cage, and described separation pipe includes flexible outer tube 41 and the interior muscle 42 being through in flexible outer tube endoporus.Separate pipe flexible outer tube be external diameter be 40mm, the rubber tube of wall thickness 2.5mm, described interior muscle is the steel wire rope of a diameter of 20mm, is provided with the space of 7.5mm, is filled with fine sand in described space between the internal diameter and the external diameter of interior muscle of flexible outer tube.Separating effective steel wire 45 to be banded on main tendon bush, colligation dynamics should be appropriate, can be moved by the interior muscle separated in pipe after colligation in flexible outer tube.
It is provided with two security strips 16 preventing rising of steel cage from causing separating the skew of pipe position at described steel reinforcement cage bottom position;Described security strip is welded to the wide 50mm of steel reinforcement cage lower end, the steel plate of thick 5mm, and two security strips become right-angled intersection to arrange.
A kind of pile foundation pile crown entirety restructuring bankrupt, described method uses above-mentioned a kind of pile foundation pile crown entirety to abolish structure, is separated with pile foundation from design pile body end face by the pile crown of pile foundation, and the position of the design pile body end face of pile foundation is pile crown line of cut;The step of described method includes:
A. determine main ribs sleeve pipe and the length of sounding sleeve pipe according to the position of steel reinforcement cage main muscle upper end and the pile crown line of cut of pile foundation and cut main tendon bush and sounding sleeve pipe.
B. need set to become owner of described void filler is set on the length section of tendon bush at main muscle, need at sound detecting pipe to be inserted on the length section of sounding sleeve pipe void filler is set.
C. main tendon bush step a cut is inserted in the main muscle being provided with void filler by step b, the lower end of the main tendon bush being enclosed within main muscle is less than described pile crown line of cut, it is wound around sealant tape in the lower end of main tendon bush, makes the gap between main tendon bush and main muscle be sealed and make main tendon bush be fixed on main muscle;Sounding sleeve pipe step a cut is inserted in the sound detecting pipe being provided with void filler by step b, the lower end of the sounding sleeve pipe being enclosed within sound detecting pipe is not higher than described pile crown line of cut, it is wound around sealant tape in the lower end of sounding sleeve pipe, makes the gap between sounding sleeve pipe and sound detecting pipe be sealed and make sounding sleeve pipe be fixed on sound detecting pipe.
D. flexible outer tube and the muscle of described separation pipe is cut according to the length enclosed around steel reinforcement cage main muscle one and described extension, interior muscle is penetrated in the endoporus of flexible outer tube, filling fine sand in the space between flexible outer tube and interior muscle, the two ends sealant tape separating pipe seals
That e. step d is made separates pipe at pile crown line of cut position ring around the steel reinforcement cage being cased with main tendon bush main muscle one circle, separate pipe and the extension extended to pile foundation outer wall direction is set at two ends joining place, use steel wire will to separate pipe colligation on the external diameter of main tendon bush, controlling colligation dynamics during colligation, the interior muscle separated in pipe after enabling by colligation moves in flexible outer tube;
F. to pile foundation casting concrete, pouring of concrete highly exceedes the position separating pipe, is labeled, when concreting, the two ends junction separating pipe.
G. after pile foundation concrete reaches hardness requirement, excavation pile foundation makes pile crown line of cut expose with upper bit, mark according to the step f two ends junction to separating pipe, the concrete of the two ends junction of hammering separation pipe, makes the two ends junction of separation pipe expose the extension separating pipe;Remove, in the termination of extension, the sealant tape being wound around, from separating, pipe is extracted muscle out.
H. using rock drill to bore multiple sorting holes around pile foundation to vertical pile body direction along separating pipe position ring in pile foundation, the degree of depth of described sorting hole is not less than the 1/5 of stake footpath;Then will separate in chock insertion sorting hole, tap pile foundation along the position separating pipe, until pile crown separates with design pile body end face generation at sorting hole;
i. Hang out the top pile crown separated with pile foundation pile body, main tendon bush and sounding sleeve pipe together to be hung out with described top pile crown.
In step a, it is provided with two security strips preventing rising of steel cage from causing separating the skew of pipe position at described steel reinforcement cage bottom position;Described security strip be security strip be width be 50mm, thickness be the steel plate of 5mm, two security strips become right-angled intersection to arrange, the vertical main muscle in security strip width face;
In stepb, the internal layer of the described void filler arranged with sound detecting pipe in main ribs is wrapped around main muscle and the plastic foil of sound detecting pipe external diameter, at plastic foil trypsin method foamed glue;
Main tendon bush is after muscle become owner of by set, and the upper end of main tendon bush is higher than the upper end of main muscle, in step c, and filling-foam glue in the main tendon bush pipeline section higher than main muscle upper end;Described sounding sleeve pipe is after being inserted in sound detecting pipe, and the upper end of sounding sleeve pipe is higher than the upper end of sound detecting pipe, in step c, and filling-foam glue in the sounding sleeve pipe pipeline section higher than sound detecting pipe upper end;
In step c, the length that main tendon bush is wound around by sealant tape is not less than 50mm, is wound around the number of turns and is not less than 50mm not less than 5 circles, the length that the main muscle of main tendon bush lower end is wound around by sealant tape, is wound around the number of turns not less than 5 circles;The length that the lower end of sounding sleeve pipe is wound around by sealant tape is not less than 50mm, is wound around the number of turns and is not less than 50mm not less than 5 circles, the length that the sound detecting pipe of sounding its lower end is wound around by sealant tape, is wound around the number of turns not less than 5 circles.
In step h, the quantity of sorting hole is no less than 6.
Embodiment two:
A kind of pile foundation pile crown entirety restructuring bankrupt, described method uses a kind of pile foundation pile crown entirety of embodiment one to abolish structure, is separated with pile foundation from design pile body end face by the pile crown of pile foundation, and the position of the design pile body end face of pile foundation is pile crown line of cut;The step of described method includes:
A. main ribs sleeve pipe and the length of sounding sleeve pipe are determined according to the position of steel reinforcement cage main muscle upper end and the pile crown line of cut of pile foundation.Design requires that main muscle exceeds design pile body end face (i.e. exceeding pile crown line of cut) 1000mm, and the upper end of main tendon bush is less than pile crown line of cut 25mm higher than the upper end 75mm of main muscle, the lower end of main tendon bush, thus can calculate a length of 1100mm of main tendon bush;The diameter of main muscle is 25mm, should retain the space not less than 5mm between main muscle external diameter and the internal diameter of main tendon bush, the PE pipe 30 that the external diameter cutting out 1100mm length is 40mm, internal diameter is 35mm.
The upper end of sounding sleeve pipe is higher than the upper end 75mm of sound detecting pipe;The lower end of sounding sleeve pipe is less than pile crown line of cut 25mm, thus can calculate a length of 1100mm of sounding sleeve pipe, the external diameter of sound detecting pipe is 50mm, the space not less than 5mm should be retained, the PE pipe 3 that the external diameter cutting out 1100mm length is 65mm, internal diameter is 60mm between the internal diameter of sound detecting pipe external diameter and sounding sleeve pipe.
It is provided with two security strips preventing rising of steel cage from causing separating the skew of pipe position at described steel reinforcement cage bottom position;Described security strip be security strip be width be 50mm, thickness be the steel plate of 5mm, two security strips become right-angled intersection to arrange, the vertical main muscle in security strip width face.
The most main muscle needs set to become owner of the lower end that length section the is main tendon bush length to main top rib end of tendon bush, thus at main muscle, from top, the length section of downward 1025mm arranges void filler, void filler is foamed glue and plastic foil, described plastic foil is wrapped on main muscle external diameter, blend compounds band is fixed on main muscle, at plastic foil trypsin method foamed glue.
Sound detecting pipe needs to be inserted in the length on the lower end that length section is sounding sleeve pipe to the sound detecting pipe top of sounding sleeve pipe, thus from the length section of the downward 1025mm in top, put void filler at sound detecting pipe, void filler is foamed glue and plastic foil, described plastic foil is wrapped on sound detecting pipe external diameter, blend compounds band is fixed in sounding, at plastic foil trypsin method foamed glue.
C. main tendon bush step a cut is inserted in the main muscle being provided with void filler by step b, the lower end of the main tendon bush being enclosed within main muscle is less than pile crown line of cut 25mm, sealant tape it is wound around in the lower end of main tendon bush, sealant tape covers length L4=50mm of main tendon bush, covers length L5=50mm(of main muscle as shown in Figure 5), being wound around the number of turns to enclose not less than 5, sealant tape makes the gap between main tendon bush and main muscle be sealed and makes main tendon bush be fixed on main muscle;Sounding sleeve pipe step a cut is inserted in the sound detecting pipe being provided with void filler by step b, the position less than 25mm below pile crown line of cut, the lower end of the sounding sleeve pipe being enclosed within sound detecting pipe, sealant tape it is wound around in the lower end of sounding sleeve pipe, sealant tape covers a length of 50mm of sounding sleeve pipe, covers a length of 50mm of sounding, it is wound around the number of turns to enclose not less than 5, makes the gap between sounding sleeve pipe and sound detecting pipe be sealed and make sounding sleeve pipe be fixed on sound detecting pipe.Filling-foam glue in the main tendon bush pipeline section higher than main muscle upper end;Filling-foam glue in the sounding sleeve pipe pipeline section higher than sound detecting pipe upper end.
D. flexible outer tube and the muscle of described separation pipe is cut according to the length enclosed around steel reinforcement cage main muscle one and described extension;Flexible outer tube be external diameter be 40mm, internal diameter be the rubber tube of 35mm, muscle is the steel wire rope of a diameter of 20mm;The extension of flexible outer tube is 100mm, with flexible outer tube actual measurement around steel reinforcement cage main muscle one circle and the length of extension, the muscle that flexible outer tube is identical with flexible outer tube with length is cut by the length of actual measurement, interior muscle is penetrated in the endoporus of flexible outer tube, filling fine sand in the space between flexible outer tube and interior muscle, the two ends sealant tape separating pipe seals.
That e. step d is made separates pipe at pile crown line of cut position ring around the steel reinforcement cage being cased with main tendon bush main muscle one circle, separates pipe and arranges the extension extended to pile foundation outer wall direction at two ends joining place;Using steel wire by separation pipe colligation on the external diameter of main tendon bush, during colligation, first tightened by steel wire on main tendon bush, then colligation separates pipe, controls to separate the colligation dynamics of pipe, and the interior muscle in separation pipe after enabling by colligation moves in flexible outer tube.
F. to pile foundation casting concrete, pouring of concrete highly exceedes the position separating pipe, is labeled, when concreting, the two ends junction separating pipe.
G. after pile foundation concrete reaches hardness requirement, excavation pile foundation makes pile crown line of cut expose with upper bit, mark according to the step f two ends junction to separating pipe, the concrete of the two ends junction of hammering separation pipe, makes the two ends junction of separation pipe expose the extension separating pipe;Remove, in the termination of extension, the sealant tape being wound around, from separating, pipe is extracted muscle out.Continue along pile crown line of cut position hammering concrete, make the concrete between separation pipe and pile foundation outer wall come off, separate pipe and expose.When extracting muscle out, owing to the thickness that the intensity of muscle is higher, separate between pipe and pile foundation outer wall is less, makes the concrete between separation pipe and pile foundation outer wall come off sometimes, make whole separation pipe be pulled out, therefore operation can be made to simplify no longer along pile crown line of cut position hammering concrete.
H. using rock drill to bore 6 sorting holes around pile foundation to vertical pile body direction along separating pipe position ring in pile foundation, the degree of depth of described sorting hole is not less than 300mm;Then will separate in chock insertion sorting hole, tap pile foundation along the position separating pipe, until pile crown separates with design pile body end face generation at sorting hole.
I. use lifting machine to hang out the top pile crown separated with pile foundation pile body, main tendon bush and sounding sleeve pipe together to be hung out with described top pile crown.Then colligation plastic foil on main muscle and sound detecting pipe and foamed glue (the most described void filler) are removed.

Claims (7)

1. a pile foundation pile crown entirety abolishes structure, including the main muscle of the steel reinforcement cage in pile foundation and pile foundation, sound detecting pipe, after pile foundation has poured, the pile crown of pile foundation separates with pile foundation at design pile body end face, and the position of the design pile body end face of pile foundation is pile crown line of cut;It is characterized in that, the main muscle at described steel reinforcement cage is set with main tendon bush higher than design pile body end face with epimere, is provided with space between the external diameter and the internal diameter of main tendon bush of main ribs;Described sound detecting pipe is set with sounding sleeve pipe, between the external diameter and the internal diameter of sounding sleeve pipe of sound detecting pipe, is provided with space;Main ribs sleeve pipe and sounding sleeve pipe are PE pipes;Between the external diameter and the internal diameter of main tendon bush of main ribs, it is provided with the space not less than 5mm, between the external diameter and the internal diameter of sounding sleeve pipe of described sound detecting pipe, is provided with the space not less than 5mm;In the space between the external diameter and the internal diameter of main tendon bush of main ribs, there is void filler, between the external diameter and the internal diameter of sounding sleeve pipe of described sound detecting pipe, also have described void filler;Void filler is plastic foil, foamed glue;
The lower end of the main tendon bush being enclosed within main muscle is less than described pile crown line of cut;Position ring at pile crown line of cut is provided with separation pipe around the main muscle of steel reinforcement cage, and described separation pipe includes flexible outer tube and the interior muscle being through in flexible outer tube endoporus;The flexible outer tube of described separation pipe is rubber tube, and described interior muscle is steel wire rope, is provided with space between the internal diameter and the external diameter of interior muscle of flexible outer tube, and the space between internal diameter and the external diameter of interior muscle of described flexible outer tube is 5mm~10mm, is filled with fine sand in space;
It is provided with two security strips preventing rising of steel cage from causing separating the skew of pipe position at described steel reinforcement cage bottom position;Described security strip is welded to the wide 50mm of steel reinforcement cage lower end, the steel plate of thick 5mm, and two security strips become right-angled intersection to arrange.
A kind of pile foundation pile crown entirety the most according to claim 1 abolishes structure, it is characterised in that, higher than the upper end of main ribs, there is apex filler the upper end of main ribs sleeve pipe in the main tendon bush pipeline section higher than main muscle upper end;, higher than the upper end of described sound detecting pipe, also there is described apex filler the upper end of described sounding sleeve pipe in the sounding sleeve pipe pipeline section higher than sound detecting pipe upper end;Described apex filler includes foamed glue;
It is provided with between lower end and the main muscle of main tendon bush for fixing main tendon bush and closing the sealant tape in space between main tendon bush and main muscle, is provided with between lower end and the sound detecting pipe of sounding sleeve pipe for fixing sounding sleeve pipe and closing the sealant tape in space between sounding sleeve pipe and sound detecting pipe.
A kind of pile foundation pile crown entirety the most according to claim 2 abolishes structure, it is characterised in that the upper end of main ribs sleeve pipe is higher than the upper end 75mm of main ribs, and the upper end of described sounding sleeve pipe is higher than the upper end 75mm of described sound detecting pipe;The lower end of main tendon bush is less than described pile crown line of cut 25mm, and the lower end of described sounding sleeve pipe is less than described pile crown line of cut 25mm.
A kind of pile foundation pile crown entirety the most according to claim 1 abolishes structure, it is characterised in that the two ends of described separation pipe are provided with the sealant tape for blocking termination;Separate pipe to be banded on main ribs sleeve pipe, can be moved in flexible outer tube by the interior muscle separated in pipe after colligation;Separate pipe and be provided with the extension extended to pile foundation outer wall direction in end.
5. a pile foundation pile crown entirety restructuring bankrupt, described method uses a kind of pile foundation pile crown entirety described in claim 1 to abolish structure, being separated with pile foundation from design pile body end face by the pile crown of pile foundation, the position of the design pile body end face of pile foundation is pile crown line of cut;It is characterized in that, the step of described method includes:
A. determine main ribs sleeve pipe and the length of sounding sleeve pipe according to the position of steel reinforcement cage main muscle upper end and the pile crown line of cut of pile foundation and cut main tendon bush and sounding sleeve pipe;
B. need set to become owner of described void filler is set on the length section of tendon bush at main muscle, need at sound detecting pipe to be inserted on the length section of sounding sleeve pipe void filler is set;
C. main tendon bush step a cut is inserted in the main muscle being provided with void filler by step b, the lower end of the main tendon bush being enclosed within main muscle is less than described pile crown line of cut, it is wound around sealant tape in the lower end of main tendon bush, makes the space between main tendon bush and main muscle be sealed and make main tendon bush be fixed on main muscle;Sounding sleeve pipe step a cut is inserted in the sound detecting pipe being provided with void filler by step b, the lower end of the sounding sleeve pipe being enclosed within sound detecting pipe is not higher than described pile crown line of cut, it is wound around sealant tape in the lower end of sounding sleeve pipe, makes the gap between sounding sleeve pipe and sound detecting pipe be sealed and make sounding sleeve pipe be fixed on sound detecting pipe;
D. flexible outer tube and the muscle of described separation pipe is cut according to the length around steel reinforcement cage main muscle one circle and the extension length to the extension of pile foundation outer wall direction, interior muscle is penetrated in the endoporus of flexible outer tube, filling fine sand in the space between the internal diameter and the external diameter of interior muscle of flexible outer tube, the two ends sealant tape separating pipe seals;
That e. step d is made separates pipe at pile crown line of cut position ring around the steel reinforcement cage being cased with main tendon bush main muscle one circle, separate pipe and the extension extended to pile foundation outer wall direction is set at two ends joining place, use steel wire will to separate pipe colligation on the external diameter of main tendon bush, controlling colligation dynamics during colligation, the interior muscle separated in pipe after enabling by colligation moves in flexible outer tube;
F. to pile foundation casting concrete, pouring of concrete highly exceedes the position separating pipe, is labeled, when concreting, the two ends junction separating pipe;
G. after pile foundation concrete reaches hardness requirement, excavation pile foundation makes pile crown line of cut expose with upper bit, mark according to the step f two ends junction to separating pipe, the concrete of the two ends junction of hammering separation pipe, makes the two ends junction of separation pipe expose the extension separating pipe;Remove, in the termination of extension, the sealant tape being wound around, from separating, pipe is extracted muscle out;
H. using rock drill to bore multiple sorting holes around pile foundation to vertical pile body direction along separating pipe position ring in pile foundation, the degree of depth of described sorting hole is not less than the 1/5 of stake footpath;Then will separate in chock insertion sorting hole, tap pile foundation along the position separating pipe, until pile crown separates with design pile body end face generation at sorting hole;
I. hang out the top pile crown separated with pile foundation pile body, main tendon bush and sounding sleeve pipe together to be hung out with described top pile crown;
In step a, it is provided with two security strips preventing rising of steel cage from causing separating the skew of pipe position at described steel reinforcement cage bottom position;Described security strip be security strip be width be 50mm, thickness be the steel plate of 5mm, two security strips become right-angled intersection to arrange, vertical main muscle direction, security strip width face;
In stepb, the internal layer of the described void filler arranged in main ribs and on sound detecting pipe is wrapped around main muscle and the plastic foil of sound detecting pipe external diameter, at plastic foil trypsin method foamed glue.
A kind of pile foundation pile crown entirety restructuring bankrupt the most according to claim 5, it is characterised in that main tendon bush is after muscle become owner of by set, and the upper end of main tendon bush is higher than the upper end of main muscle, in step c, filling-foam glue in the main tendon bush pipeline section higher than main muscle upper end;Described sounding sleeve pipe is after being inserted in sound detecting pipe, and the upper end of sounding sleeve pipe is higher than the upper end of sound detecting pipe, in step c, and filling-foam glue in the sounding sleeve pipe pipeline section higher than sound detecting pipe upper end;
In step c, the length that main tendon bush is wound around by sealant tape is not less than 50mm, is wound around the number of turns and is not less than 50mm not less than 5 circles, the length that the main muscle of main tendon bush lower end is wound around by sealant tape, is wound around the number of turns not less than 5 circles;The length that the lower end of sounding sleeve pipe is wound around by sealant tape is not less than 50mm, is wound around the number of turns and is not less than 50mm not less than 5 circles, the length that the sound detecting pipe of sounding its lower end is wound around by sealant tape, is wound around the number of turns not less than 5 circles.
A kind of pile foundation pile crown entirety restructuring bankrupt the most according to claim 5, it is characterised in that the quantity of sorting hole is no less than 6 in step h.
CN201410638883.9A 2014-11-13 2014-11-13 A kind of pile foundation pile crown entirety abolishes structures and methods Active CN104343115B (en)

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CN106400802B (en) * 2016-08-24 2019-02-26 中交一公局厦门工程有限公司 A kind of drilled pile pile crown is pre-buried to exempt from the whole quickly lifting method of ring cutting that drills
CN107326905B (en) * 2017-06-30 2019-10-18 中国一冶集团有限公司 Convenient for removing the construction method of pile foundation air-free concrete steel pile casting
CN107214843B (en) * 2017-07-06 2019-02-12 中建八局第三建设有限公司 One kind is exempted to cut pile crown type precast square pile constructing device and its construction method
CN108193684A (en) * 2017-12-18 2018-06-22 中国二十冶集团有限公司 Cast-in-situ bored pile pile crown detaches removing method

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