CN114045830A - Pile head integral stripping and breaking device and construction method - Google Patents
Pile head integral stripping and breaking device and construction method Download PDFInfo
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- CN114045830A CN114045830A CN202111596486.6A CN202111596486A CN114045830A CN 114045830 A CN114045830 A CN 114045830A CN 202111596486 A CN202111596486 A CN 202111596486A CN 114045830 A CN114045830 A CN 114045830A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D9/00—Removing sheet piles bulkheads, piles, mould-pipes or other moulds or parts thereof
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/223—Details of top sections of foundation piles
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Abstract
The invention belongs to the technical field of pile foundation construction of bridge engineering and building engineering, and particularly relates to a pile head integral stripping and breaking device and a construction method thereof. The invention integrates the design of the inner and outer steel rings, the stripping steel ring and the built-in mobile breaking mechanism, achieves the aims of increasing or reducing the number of jacks according to specific needs and improving the breaking efficiency, and is used for solving the problems of poor pile head breaking effect, low breaking efficiency, influence on the quality of a pile top and complex device installation in the prior art.
Description
Technical Field
The invention belongs to the technical field of pile foundation construction of bridge engineering and constructional engineering, and particularly relates to a pile head integral stripping and breaking device and a construction method.
Background
During the bored concrete pile construction, for avoiding influence pile body intensity and quality such as some drilling mud or concrete laitance of pile bolck muddy, add the take the altitude in advance on the basis of design value with the actual pile bolck elevation of pile foundation usually, pile foundation concrete pouring is accomplished and reaches the design strength after, and the pile head concrete that adds the altitude range in advance to the pile bolck peels off or bores except, just can carry out the construction of later stage cushion cap after the pile head breaks away, consequently, the pile head breaks away the development of quality and the direct follow-up pile foundation construction process of influence of efficiency.
The existing pile head breaking device mostly adopts large-scale pile head breaking mechanical equipment, such as a hydraulic pile breaking machine or a pile cutting machine, and the like, although the devices have higher construction speed than the traditional technology, the problems of heavy machinery, higher manufacturing cost, poorer construction accuracy and the like exist, a small amount of light equipment needs to break the outer part of a pile body and then is broken by equipment such as a jack and the like, the concrete protective layer part outside a reinforcement cage is broken, when the pile diameter is smaller and the thickness of the concrete protective layer is thinner, the jack is not installed, even if the pile diameter is larger, when a small jack is installed in enough space, the pile head stripping and breaking efficiency is lower, the middle concrete breaking effect is poor and the like due to the smaller push surface of the jack; some built-in type removing devices are arranged at the designed elevation of the pile top, and due to the fact that the peeling surface is not flat or the elevation of the peeling surface of the pile head is greatly deviated when the pile head is peeled off, the concrete of the pile top is easily damaged, the removing quality of the pile head is affected, the devices are troublesome to mount and dismount, inconvenience is caused to recycling of the devices, the number of built-in jacks cannot be flexibly adjusted to meet the requirements of pile foundations under different conditions, and therefore the pile head integral peeling removing device and the construction method are provided for solving the problems.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a pile head integral stripping and removing device and a construction method, wherein an inner steel ring, an outer steel ring, a stripping steel ring and a built-in moving and removing mechanism are integrally designed, so that the aims of increasing or reducing the number of jacks and improving the removing efficiency according to specific needs are fulfilled, and the problems that the pile head removing effect is poor, the removing efficiency is low, the quality of the pile head is influenced and the device is complex to install and detach in the prior art are solved.
In order to solve the technical problems, the invention adopts the following technical scheme: a pile head integral stripping and breaking device comprises an outer layer steel ring internally tangent to a pile foundation steel reinforcement cage longitudinal bar, an inner layer steel ring superposed with the circle center of the outer layer steel ring and a built-in mobile breaking device uniformly arranged at equal intervals in the circumferential direction, wherein the pile foundation steel reinforcement cage longitudinal bar is provided with a stirrup in the circumferential direction at the designed elevation of a pile top, a longitudinal bar sleeve is sleeved at the position, higher than the designed stripping surface of the pile head, of the pile foundation steel reinforcement cage longitudinal bar, a stripping steel ring is sleeved outside the designed stripping surface of the pile head, the stripping steel ring is 5-10 cm higher than the stirrup, the stripping steel ring and the outer layer steel ring are both in threaded connection with a first bolt, the outer layer steel ring is fixedly connected with one end of a connecting rod piece, the other end of the connecting rod piece is connected with the inner layer steel ring, the diameter of the inner layer steel ring is larger than that of a cast concrete pipe, the built-in mobile breaking device comprises a bag type jack arranged inside a lower protective shell, the bottom of the lower protective shell is fixedly provided with a lower flow guide body, the bag-type jack is arranged on the upper surface of the lower flow guide body, the upper part of the lower protective shell is provided with an annular limiting groove, the limiting groove is connected with the upper protective shell in a sliding manner, the top of the upper protective shell is fixedly provided with an upper flow guide body, the middle part of the upper flow guide body is provided with a through hole, an interface of the bag-type jack is connected with the bottom of an oil pressure pipe which penetrates through the through hole, the part of the top of the oil pressure pipe, which exceeds the longitudinal rib of the pile foundation reinforcement cage, is fixedly provided with a connector, the outer part of the oil pressure pipe is sleeved with an oil pressure sleeve pipe, an outer sleeve ring with a notch is sleeved on the outer layer steel ring, one side of the outer sleeve ring is welded with the lower protective shell, the other side with the notch is provided with a first fixing groove, the first fixing groove is clamped with an arc-shaped outer clamping ring, and the clamping joint of the outer sleeve ring is in threaded connection with a second bolt, the second bolt offsets with outer steel ring, the inlayer steel ring cover is established the interior lantern ring that has the breach, interior lantern ring one side and protecting crust welding down, and the second fixed slot has been seted up to the opposite side that has the breach, second fixed slot and curved interior snap ring joint, interior lantern ring and interior snap ring joint department all with third bolt threaded connection, the third bolt offsets with inlayer steel ring.
Furthermore, the circle centers of the stripping steel ring and the outer layer steel ring are superposed, the diameter of the stripping steel ring is not smaller than the thickness of the concrete protective layer, and the position of the stripping steel ring is 5cm higher than that of the stirrup.
Furthermore, the outer layer steel ring is bound with the pile foundation reinforcement cage longitudinal bars at the corresponding positions.
Further, indulge muscle sheathed tube internal diameter and be greater than pile foundation steel reinforcement cage and indulge the muscle diameter, the sheathed tube internal diameter of oil pressure is greater than the oil pressure external diameter of tubes, indulges muscle sleeve pipe and oil pressure sleeve pipe and all adopts antiseized material and go up the end to seal, indulge muscle and oil pressure pipe ligature with pile foundation steel reinforcement cage respectively.
Furthermore, the upper flow guiding body and the lower flow guiding body are both conical, the diameter of the upper surface of the lower flow guiding body is equal to the diameter of the bottom excircle of the lower protective shell, the diameter of the bottom of the upper flow guiding body is equal to the diameter of the upper surface of the lower flow guiding body, and the upper flow guiding body and the lower flow guiding body are both made of steel blocks.
Furthermore, the outer sides of the stripping steel ring, the outer layer steel ring, the inner layer steel ring, the connecting rod piece, the first bolt and the built-in movable breaking device are all covered with anti-bonding film materials.
The invention also provides a construction method of the pile head integral stripping and breaking device, which uses the pile head integral stripping and breaking device and comprises the following steps:
and S1, calculating the pushing load required by pile head stripping according to the parameters such as the diameter of the pile, the weight of the reserved part of the pile head, the strength grade of the concrete of the pile foundation and the like, and preliminarily determining the specification and the number of the required bag type jacks.
S2, manufacturing the pile head stripping and breaking device: manufacturing an outer layer steel ring of a steel framework according to the inner diameter of a longitudinal bar of a pile foundation reinforcement cage, determining the diameter of the inner layer steel ring according to the diameter of a poured concrete pipe and the specification of a jack, manufacturing the inner layer steel ring, connecting the outer layer steel ring with the inner layer steel ring through a connecting rod piece, loosening a second bolt and a third bolt, respectively sleeving an inner lantern ring and an outer lantern ring on the inner layer steel ring and the outer layer steel ring, and uniformly arranging a built-in mobile breaking device comprising a bag type jack between the inner layer steel ring and the outer layer steel ring at equal intervals; the surface of each component of the device is covered with a layer of anti-bonding film material.
S3, binding a reinforcement cage of a pile foundation main body: and (3) binding stirrups near the pile head stripping device together, after the reinforcement cage is bound, respectively sleeving longitudinal reinforcement sleeves on the parts of each longitudinal reinforcement above the designed stripping surface elevation, and sleeving the oil pressure sleeves outside the oil pressure pipes.
S4, installing the pile head stripping device: the pile head stripping and breaking device is arranged in the designed pile head stripping surface position from the cage opening, then a stripping steel ring is sleeved outside the stripping steel ring, the first bolt is screwed, and the outer layer steel ring of the device is annularly bound with the peripheral pile foundation reinforcement cage longitudinal bars, so that the device is firmly fixed; and then marking the position of the stripping steel ring at the position of the designed stripping surface of the pile head.
S5, lowering the reinforcement cage to a designed elevation in the pile hole, fixing, quality inspection and secondary hole cleaning, and then performing corresponding pile foundation construction procedures such as underwater concrete pouring and the like; after the concrete reaches the design strength, excavating a soil body on the periphery of the pile head, connecting connectors at the tops of jack oil pressure pipes reserved on the pile top with an external hydraulic control system, starting to pressurize and control each bag type jack to synchronously push the pile head upwards, observing the position of a stripping steel ring mark, and whether the concrete begins to strip from the preset stripping starting position, after the concrete of the pile head slowly strips from a pile main body along the design stripping surface, vertically hoisting the pile head by adopting hoisting equipment, and hoisting the pile head away from the pile top; the oil pressure of the bag jack is gradually unloaded, so that the bag jack is restored to the initial state.
And S6, removing the longitudinal bar sleeve, the oil pressure sleeve, the inner and outer steel rings, the stripping steel ring and the anti-bonding film material covered on the surface of the built-in mobile breaking device of the exposed longitudinal bar on the pile top, and removing the built-in mobile breaking device bound on the reinforcement cage, wherein the built-in mobile breaking device can be repeatedly used for stripping the pile head of the next batch of piles.
And S7, chiseling the reserved part of the pile top to the designed elevation of the pile top, and carrying out leveling treatment on the pile head and returning and arranging the exposed longitudinal ribs to start the subsequent construction of the bearing platform.
Further, in the step S2, the built-in moving breaking device integrates the upper and lower protective shells, the upper and lower current carriers, the capsule jack, the inner and outer rings, and then the two shells are mounted on the inner and outer steel rings.
Furthermore, in step S3, the expanding agent is injected into the lower openings of the longitudinal rib sleeve and the oil pressure sleeve and is bound and sealed by a wide band, and the upper opening of the sleeve is filled with a filler, such as wood chips or fine sand, and is sealed, or the upper opening and the lower opening are not filled with the filler but need to be sealed.
Compared with the prior art, the invention has the following beneficial effects:
1. the invention adopts the bag jack, the upper and lower contact surfaces of the jack and the pile head are wide, and the sum of the areas of the loading end surfaces accounts for 50 percent of the cross section of the pile foundation at most, so that higher jacking force can be obtained by adopting lower internal pressure compared with a common hydraulic jack, the pile head stripping surface is uniformly stressed, and the pile head stripping efficiency is effectively increased; because the pressurization of the bag jack is lower, the construction safety and the stability are effectively improved.
2. According to the invention, through presetting the stripping surface higher than the designed elevation of the pile head and setting the stripping steel ring with the diameter not smaller than the thickness of the concrete protective layer, the concrete in the thickness range of the pile head peripheral protective layer is stripped from the preset peripheral stripping steel ring, then the jack is used for further pushing the concrete in the pile foundation reinforcement cage, the crack is further extended to the inner core along the peripheral concrete stripping surface, and then a relatively controllable pile head stripping surface is formed, the concept is clear, the pile head concrete stripping path is clear, the construction accuracy and the pile head stripping efficiency are improved, and meanwhile, the quality of the pile head is prevented from being damaged by the uncontrollable pile head stripping surface.
3. The invention can ensure that the bag type jack can move annularly between the inner steel ring and the outer steel ring while being protected by arranging the upper protective shell, the inner lantern ring, the outer lantern ring and the inner and outer snap rings, is favorable for increasing and decreasing the number of the jacks on the device according to requirements, is convenient for assembling and disassembling the jack device, and can determine the jacks with different specifications and numbers according to different pile diameters, so the pile head stripping device is suitable for pile foundations with various pile diameters, has flexible construction form and has wide adaptability.
4. The stripping steel ring, the inner and outer steel rings and the built-in mobile breaking device are integrally designed and connected with the longitudinal bars of the reinforcement cage in a binding mode, so that the whole device is convenient to mount, and the stripping steel ring positioned on the outer side of the longitudinal bars of the reinforcement cage is connected with the outer steel ring positioned on the inner side of the reinforcement cage through bolts, so that the stripping steel ring and the outer steel ring clamp the longitudinal bars of the reinforcement cage, and the device has high connection tightness and stability without welding; the pile head is more convenient to be detached from the pile foundation reinforcement cage after being peeled off and reused in other batches of pile foundations, namely, the pile head can be detached conveniently and repeatedly and circularly used, and the bag type jack unit is simple in structure, low in manufacturing cost compared with a common jack and good in economical efficiency.
5. The device is through connecting the inside and outside steel ring of member intercommunication to set up the baffle and make things convenient for concrete laitance to pass through the device along the baffle, the circulation of concrete about the face is peeled off in the reinforcing, prevents that concrete laitance from piling up near stripping off device, has guaranteed pile bolck concrete quality.
Drawings
FIG. 1 is a schematic front view of the present invention;
FIG. 2 is a schematic diagram of the sleeveless construction of the present invention;
FIG. 3 is a schematic top view of the present invention;
FIG. 4 is a schematic view of the overall structure of the present invention;
FIG. 5 is a schematic structural view of a built-in mobile destruction mechanism according to the present invention;
FIG. 6 is a schematic view of a first fixing groove structure according to the present invention;
FIG. 7 is a schematic view of a second fixing groove structure according to the present invention;
FIG. 8 is a schematic cross-sectional view of the protective shell of the present invention;
FIG. 9 is a schematic cross-sectional view of the limiting groove of the present invention.
Reference numerals referred to in the drawings are: 1. pile foundation reinforcement cage longitudinal bars; 2. a longitudinal rib sleeve; 3. hooping; 4. stripping the steel ring; 5. an outer layer steel ring; 6. a first bolt; 7. connecting rod pieces; 8. an inner layer steel ring; 9. a lower protective shell; 10. an upper protective shell; 11. an upper baffle; 12. a lower baffle; 13. an oil pressure pipe; 14. an oil pressure sleeve; 15. a connector; 16. an outer collar; 17. a first fixing groove; 18. an outer snap ring; 19. a second bolt; 20. an inner collar; 21. a second fixing groove; 22. an inner snap ring; 23. a third bolt; 24. a limiting groove; 25. a bag jack; 26. and a through hole.
Detailed Description
In order that those skilled in the art can better understand the present invention, the following technical solutions are further described with reference to the accompanying drawings and examples.
Examples
As shown in figures 1-7, a pile head integral stripping and removing device comprises an outer layer steel ring 5 internally tangent to a pile foundation steel reinforcement cage longitudinal bar 1, an inner layer steel ring 8 superposed with the circle center of the outer layer steel ring 5 and a built-in mobile removing device uniformly arranged in a circumferential direction at equal intervals, a stirrup 3 is annularly bound on the pile foundation steel reinforcement cage longitudinal bar 1 at the designed height mark of a pile top, a longitudinal bar sleeve 2 is sleeved at the position of the pile foundation steel reinforcement cage longitudinal bar 1 higher than the designed stripping surface of the pile head, a stripping steel ring 4 is sleeved outside the pile head design stripping surface of the pile foundation steel reinforcement cage longitudinal bar 1, the stripping steel ring 4 is 5-10 cm higher than the stirrup 3, the stripping steel ring 4 and the outer layer steel ring 5 are both in threaded connection with a first bolt 6, the outer layer steel ring 5 is fixedly connected with one end of a connecting rod piece 7, the other end of the connecting rod piece 7 is connected with the inner layer steel ring 8, the diameter of the inner layer steel ring 8 is larger than that of a cast concrete conduit, the built-in mobile breaking device comprises a bag type jack 25 arranged in the lower protective shell 9, the bag type jack is adopted, the upper contact surface and the lower contact surface of the jack and the pile head are wide, the sum of the areas of the loading end surfaces accounts for 50% of the cross section of the pile foundation at most, therefore, compared with a common hydraulic jack, the built-in mobile breaking device can obtain higher jacking force by adopting lower internal pressure, so that the pile head stripping surface is uniformly stressed, and the pile head stripping efficiency is effectively increased; because the pressurization of the bag jack is low, the construction safety and the stability are effectively improved, the bottom of the lower protective shell 9 is fixedly provided with a lower flow guide body 12, the bag jack 25 is arranged on the upper surface of the lower flow guide body 12, the upper part of the lower protective shell 9 is provided with an annular limiting groove 24, the limiting groove 24 is in sliding connection with the upper protective shell 10, the top of the upper protective shell 10 is fixedly provided with an upper flow guide body 11, the middle part of the upper flow guide body 11 is provided with a through hole 26, the interface of the bag jack 25 is connected with the bottom of an oil pressure pipe 13 which penetrates through the through hole 26, the part of the top of the oil pressure pipe 13 which exceeds the pile foundation steel reinforcement cage longitudinal bar 1 is fixedly provided with a connector 15, the outside of the oil pressure pipe 13 is sleeved with an oil pressure sleeve 14, the outer steel ring 5 with a notch is sleeved with an outer sleeve ring 16, one side of the outer sleeve 16 is welded with the lower protective shell 9, the other side with the notch is provided with a first fixing groove 17, and the first fixing groove 17 is clamped with an arc-shaped outer clamping ring 18, the clamping joint of the outer collar 16 and the outer clamping ring 18 is in threaded connection with a second bolt 19, and the second bolt 19 abuts against the outer layer steel ring 5; the 8 covers of inlayer steel ring are established the interior lantern ring 20 that has the breach, and interior lantern ring 20 one side is welded with protecting crust 9 down, and second fixed slot 21 has been seted up to the opposite side that has the breach, and second fixed slot 21 and curved interior snap ring 22 joint, interior lantern ring 20 and interior snap ring 22 joint department all with third bolt 23 threaded connection, third bolt 23 offsets with inlayer steel ring 8. Stripping face higher than pile top design elevation is preset and stripping steel ring with diameter not less than concrete protective layer thickness is set, the concrete in pile head peripheral protective layer thickness range is firstly stripped from the preset peripheral stripping steel ring, then the concrete in pile foundation reinforcement cage is further pushed by a jack, the internal concrete is further extended to the inner core along the peripheral concrete stripping face, then a relatively controllable pile head stripping face is formed, the concept is clear, the pile head concrete stripping path is clear, construction accuracy and pile head stripping efficiency are improved, and meanwhile, the quality of the pile top is prevented from being damaged by the uncontrollable pile head stripping face. Through protective housing, inside and outside lantern ring and inside and outside snap ring about setting up, can hoop removal between inside and outside steel ring when making bag jack protected, be favorable to increasing and decreasing jack quantity on the device as required, and make things convenient for the equipment and dismantle of device, this pile head stripping off device can confirm the jack of different specifications and quantity according to different pile footpaths size simultaneously, so applicable in the pile foundation of various pile footpaths sizes, and the structural style is nimble, has extensive adaptability.
The stripping steel ring, the inner and outer steel rings and the built-in moving and breaking device are manufactured integrally and connected with the longitudinal bars of the reinforcement cage in a binding mode, so that the whole device is convenient to mount, and the stripping steel ring positioned on the outer side of the longitudinal bars of the reinforcement cage is connected with the outer steel ring positioned on the inner side of the reinforcement cage through bolts, and the stripping steel ring and the outer steel ring clamp the longitudinal bars of the reinforcement cage, so that the device has high connection tightness without welding; the pile head is more convenient to be detached from the pile foundation reinforcement cage after being peeled off and reused in other batches of pile foundations, namely, the pile head can be detached conveniently and repeatedly and circularly used, and the bag type jack unit is simple in structure, low in manufacturing cost compared with a common jack and good in economical efficiency.
The center of the stripping steel ring 4 coincides with the center of the outer layer steel ring 5, the diameter of the stripping steel ring 4 is not smaller than the thickness of the concrete protective layer, and the position of the stripping steel ring 4 is 5-10 cm higher than that of the stirrup 3.
The outer layer steel ring 5 is bound with the pile foundation reinforcement cage longitudinal bar 1 at the corresponding position, and the binding mode is convenient to install and disassemble.
Indulge muscle sleeve pipe 2's internal diameter and be greater than pile foundation steel reinforcement cage and indulge muscle 1 diameter, oil pressure sleeve pipe 14's internal diameter is greater than oil pressure pipe 13 external diameter, indulges muscle sleeve pipe 2 and oil pressure sleeve pipe 14 and all adopts antiseized material and go up the end to seal, indulge muscle 1 with pile foundation steel reinforcement cage respectively and tie up with oil pressure pipe 13.
Go up baffle 11 and baffle 12 down and be the toper, the upper surface diameter of baffle 12 equals the bottom excircle diameter of protecting crust 9 down, the bottom diameter of going up baffle 11 equals baffle 12 upper surface diameter down, it makes things convenient for concrete laitance to pass through the device along the baffle to go up baffle 11 and baffle 12 down all adopt the steel bloom to set up the baffle, the circulation of concrete about the face is peeled off in the reinforcing, prevent that concrete laitance from piling up near stripping off device, pile bolck concrete quality has been guaranteed.
The outer sides of the stripping steel ring 4, the outer layer steel ring 5, the inner layer steel ring 8, the connecting rod piece 7, the first bolt 6 and the built-in mobile breaking device are all covered with anti-bonding film materials.
The construction method of the pile head integral stripping and breaking device is also included, and the pile head integral stripping and breaking device comprises the following steps:
s1, calculating the pushing load required by pile head stripping according to parameters such as the size of the pile diameter, the weight of the reserved part of the pile head, the strength grade of pile foundation concrete and the like, and preliminarily determining the specification and the number of the required bag type jacks 25;
s2, manufacturing the pile head stripping and breaking device: manufacturing an outer steel ring 5 of a steel framework according to the inner diameter of a longitudinal bar of a pile foundation reinforcement cage, determining the diameter of an inner steel ring 8 by pouring the diameter of a concrete conduit and the specification of a jack, manufacturing the inner steel ring 8, connecting the outer steel ring 5 with the inner steel ring 8 through a connecting rod piece 7, loosening a second bolt 19 and a third bolt 23, respectively sleeving an inner lantern ring and an outer lantern ring on the inner steel ring and the outer steel ring, and uniformly arranging a built-in mobile breaking device comprising a bag type jack 25 between the inner steel ring and the outer steel ring at equal intervals; covering a layer of anti-bonding film material on the surface of each component of the device;
s3, binding a reinforcement cage of a pile foundation main body: binding the stirrups 3 near the pile head stripping device, respectively sleeving longitudinal bar sleeves 2 on the parts of each longitudinal bar above the designed stripping surface elevation after the reinforcement cage is bound, and sleeving an oil pressure sleeve 14 outside an oil pressure pipe 13;
s4, installing the pile head stripping device: the pile head stripping and breaking device is arranged in the designed pile head stripping surface position from the cage opening, then a stripping steel ring 4 is sleeved outside the stripping steel ring, a first bolt 6 is screwed, and an outer layer steel ring 5 of the device is annularly bound with the peripheral pile foundation reinforcement cage longitudinal bars 1, so that the device is firmly fixed; then marking the position of a stripping steel ring at the position of a design stripping surface of the pile head;
s5, lowering the reinforcement cage to a designed elevation in the pile hole, fixing, quality inspection and secondary hole cleaning, and then performing corresponding pile foundation construction procedures such as underwater concrete pouring and the like; after the concrete reaches the design strength, excavating a soil body on the periphery of the pile head, connecting a connector 15 at the top of each jack oil pressure pipe 13 reserved on the pile top with an external hydraulic control system, starting to pressurize and control each bag type jack 25 to synchronously push the pile head upwards, after the concrete of the pile head is slowly stripped from the pile main body along the design stripping surface, vertically hoisting the pile head by adopting hoisting equipment, observing the position marked by a stripping steel ring, and hoisting the pile head away from the pile top if the concrete is stripped from the preset stripping start position; gradually unloading the oil pressure of the bag jack 25 to restore the bag jack 25 to the initial state;
s6, removing the longitudinal bar sleeve 2, the oil pressure sleeve 14, the inner and outer steel rings, the stripping steel ring 4 and the anti-bonding film material covered on the surface of the built-in mobile breaking device of the exposed longitudinal bar on the pile top, and removing the built-in mobile breaking device bound on the reinforcement cage, which can be repeatedly used for stripping the pile head of the next batch of piles;
and S7, chiseling the reserved part of the pile top to the designed elevation of the pile top, and carrying out leveling treatment on the pile head and returning and arranging the exposed longitudinal ribs to start the subsequent construction of the bearing platform.
In step S2, the built-in moving breaking device integrates the upper and lower protective shells, the upper and lower deflectors, the capsule jack 25, the inner and outer rings, and then the two rings are mounted on the inner and outer steel rings.
In step S3, the expanding agent is injected into the lower openings of the longitudinal bar casing 2 and the oil pressure casing 14 and is bound and sealed by a wide band, and the upper opening of the casing is filled with a filler, such as wood chips or fine sand, and is sealed, or the upper opening and the lower opening are not filled with the filler but need to be sealed.
The above description is only for the purpose of illustrating the technical solutions of the present invention and not for the purpose of limiting the same, and other modifications or equivalent substitutions made by those skilled in the art to the technical solutions of the present invention should be covered within the scope of the claims of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (9)
1. The utility model provides a whole device that breaks off of peeling off of pile head which characterized in that: comprises an outer layer steel ring (5) internally tangent to a pile foundation steel reinforcement cage longitudinal bar (1), an inner layer steel ring (8) superposed with the circle center of the outer layer steel ring (5) and a built-in mobile breaking device which is annularly and uniformly arranged, wherein the pile foundation steel reinforcement cage longitudinal bar (1) is provided with stirrups (3) in the circumferential binding at the design elevation of a pile top, the part of the pile foundation steel reinforcement cage longitudinal bar (1) higher than the design stripping surface of a pile head is sleeved with a longitudinal bar sleeve (2), the pile foundation steel reinforcement cage longitudinal bar (1) is sleeved with a stripping steel ring (4) outside the design stripping surface of the pile head, the stripping steel ring (4) is 5-10 cm higher than the stirrups (3), the stripping steel ring (4) and the outer layer steel ring (5) are both in threaded connection with a first bolt (6), the outer layer steel ring (5) is fixedly connected with one end of a connecting rod piece (7), and the other end of the connecting rod piece (7) is connected with the inner layer steel ring (8), the diameter of the inner layer steel ring (8) is larger than that of a cast concrete conduit, the built-in mobile breaking device comprises a bag type jack (25) arranged inside a lower protective shell (9), a lower flow guide body (12) is fixedly arranged at the bottom of the lower protective shell (9), the bag type jack (25) is arranged on the upper surface of the lower flow guide body (12), an annular limiting groove (24) is formed in the upper portion of the lower protective shell (9), the limiting groove (24) is in sliding connection with an upper protective shell (10), an upper flow guide body (11) is fixedly arranged at the top of the upper protective shell (10), a through hole (26) is formed in the middle of the upper flow guide body (11), an interface of the bag type jack (25) is connected with the bottom of an oil pressure pipe (13) penetrating through the through hole (26), and a connector (15) is fixedly arranged on the portion, exceeding a steel reinforcement cage longitudinal reinforcement bar (1), of the top of a pile foundation (13), an oil pressure sleeve (14) is sleeved outside the oil pressure pipe (13), an outer sleeve ring (16) with a notch is sleeved on the outer layer steel ring (5), one side of the outer sleeve ring (16) is welded with the lower protective shell (9), a first fixing groove (17) is formed in the other side with the notch, the first fixing groove (17) is connected with an arc-shaped outer snap ring (18) in a clamped mode, the clamping positions of the outer sleeve ring (16) and the outer snap ring (18) are both in threaded connection with a second bolt (19), the second bolt (19) is abutted to the outer layer steel ring (5), an inner sleeve ring (20) with a notch is sleeved on the inner layer steel ring (8), one side of the inner sleeve ring (20) is welded with the lower protective shell (9), a second fixing groove (21) is formed in the other side with a notch, the second fixing groove (21) is clamped with an arc-shaped inner snap ring (22), and the clamping positions of the inner sleeve ring (20) and the inner snap ring (22) are both in threaded connection with a third bolt (23), the third bolt (23) is abutted against the inner layer steel ring (8).
2. The pile head integral stripping and breaking device according to claim 1, characterized in that: the circle centers of the stripping steel ring (4) and the outer layer steel ring (5) are superposed, the diameter of the stripping steel ring (4) is not smaller than the thickness of the concrete protective layer, and the position of the stripping steel ring (4) is 5cm higher than that of the stirrup (3).
3. The pile head integral stripping and breaking device according to claim 1, characterized in that: and the outer layer steel ring (5) is bound with the pile foundation reinforcement cage longitudinal bar (1) at the corresponding position.
4. The pile head integral stripping and breaking device according to claim 1, characterized in that: indulge the internal diameter of muscle sleeve pipe (2) and be greater than pile foundation steel reinforcement cage and indulge muscle (1) diameter, the internal diameter of oil pressure sleeve pipe (14) is greater than oil pressure pipe (13) external diameter, indulges muscle sleeve pipe (2) and oil pressure sleeve pipe (14) and all adopts anti-sticking material and upper and lower mouthful of sealing, indulges muscle (1) and oil pressure pipe (13) ligature with pile foundation steel reinforcement cage respectively.
5. The pile head integral stripping and breaking device according to claim 1, characterized in that: the upper guide body (11) and the lower guide body (12) are both conical, the diameter of the upper surface of the lower guide body (12) is equal to the diameter of the bottom excircle of the lower protective shell (9), the diameter of the bottom of the upper guide body (11) is equal to the diameter of the upper surface of the lower guide body (12), and the upper guide body (11) and the lower guide body (12) are both made of steel blocks.
6. The pile head integral stripping and breaking device according to claim 1, characterized in that: and the outer sides of the stripping steel ring (4), the outer layer steel ring (5), the inner layer steel ring (8), the connecting rod piece (7), the first bolt (6) and the built-in movable breaking device are all covered with anti-bonding film materials.
7. A construction method of a pile head integral stripping and removing device, which uses the pile head integral stripping and removing device of any one of claims 1 to 6, comprising the steps of:
s1, calculating the pushing load required by pile head stripping according to parameters such as the size of the pile diameter, the weight of the reserved part of the pile head, the strength grade of pile foundation concrete and the like, and preliminarily determining the specification and the number of the required bag type jacks (25) according to the pushing load;
s2, manufacturing the pile head stripping and breaking device: manufacturing an outer layer steel ring (5) of a steel framework according to the inner diameter of a longitudinal bar of a pile foundation reinforcement cage, determining the diameter of an inner layer steel ring (8) by pouring the diameter of a concrete conduit, manufacturing the inner layer steel ring (8), connecting the outer layer steel ring (5) with the inner layer steel ring (8) through a connecting rod piece (7), loosening a second bolt (19) and a third bolt (23), respectively sleeving an inner lantern ring and an outer lantern ring on the inner steel ring and the outer steel ring, and uniformly arranging a built-in mobile breaking device comprising a bag type jack (25) between the inner layer steel ring and the outer layer steel ring at equal intervals; covering a layer of anti-bonding film material on the surface of each component of the device;
s3, binding a reinforcement cage of a pile foundation main body: binding stirrups (3) near the pile head stripping device together, after the reinforcement cage is bound, respectively sleeving longitudinal reinforcement sleeves (2) on the parts of each longitudinal reinforcement above the designed stripping surface elevation, and sleeving oil pressure sleeves (14) outside the oil pressure pipe (13);
s4, installing the pile head stripping device: the pile head stripping and breaking device is arranged in the designed pile head stripping surface position from the cage opening, then a stripping steel ring (4) is sleeved outside, a first bolt (6) is screwed, and the outer layer steel ring (5) of the device is annularly bound with the peripheral pile foundation reinforcement cage longitudinal bars (1), so that the device is firmly fixed; then marking the position of a stripping steel ring (4) at the position of a designed stripping surface of the pile head;
s5, lowering the reinforcement cage to a designed elevation in the pile hole, fixing, quality inspection and secondary hole cleaning, and then performing corresponding pile foundation construction procedures such as underwater concrete pouring and the like; after the concrete reaches the design strength, excavating a soil body on the periphery of the pile head, connecting a connector (15) at the top of each jack oil pressure pipe (13) reserved on the pile top with an external hydraulic control system, starting to pressurize and control each bag type jack (25) to synchronously push the pile head upwards, observing the mark position of a stripping steel ring (4), and observing whether the concrete is stripped from the preset stripping start position or not, and after the concrete of the pile head is slowly stripped from a pile main body along the design stripping surface, adopting a lifting device to vertically lift the pile head to lift the pile head away from the pile top; gradually unloading the oil pressure of the bag type jack (25) to enable the bag type jack (25) to recover to an initial state;
s6, removing the longitudinal bar sleeve (2), the oil pressure sleeve (14), the inner and outer steel rings, the stripping steel ring (4) and the anti-bonding film material covered on the surface of the built-in mobile breaking device, and removing the built-in mobile breaking device bound on the reinforcement cage, wherein the longitudinal bar sleeve, the oil pressure sleeve (14), the inner and outer steel rings and the stripping steel ring (4) expose out of the pile top, and the pile head can be repeatedly used for stripping the next batch of piles;
and S7, chiseling the reserved part of the pile top to the designed elevation of the pile top, and carrying out leveling treatment on the pile head and returning and arranging the exposed longitudinal ribs to start the subsequent construction of the bearing platform.
8. The construction method of the pile head integral stripping and breaking device according to claim 7, characterized in that: in the step S2, the built-in moving breaking device integrates the upper and lower protective shells, the upper and lower deflectors, the bag jack (25), the inner and outer rings, and then the two rings are arranged on the inner and outer steel rings.
9. The construction method of the pile head integral stripping and breaking device according to claim 7, characterized in that: in the step S3, the lower openings of the longitudinal rib sleeve (2) and the oil pressure sleeve (14) are sprayed with the expanding agent and are bound and sealed by a wide band, and the upper opening of the sleeve is filled with the filler, such as wood chips or fine sand, and is sealed, or the upper opening and the lower opening are not filled with the filler but need to be sealed.
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| CN202111596486.6A CN114045830A (en) | 2021-12-24 | 2021-12-24 | Pile head integral stripping and breaking device and construction method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111596486.6A CN114045830A (en) | 2021-12-24 | 2021-12-24 | Pile head integral stripping and breaking device and construction method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115059062A (en) * | 2022-07-20 | 2022-09-16 | 北京爱地地质工程技术有限公司 | Chiseling structure and chiseling method for concrete pile head |
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| CN102518124A (en) * | 2011-11-30 | 2012-06-27 | 中交隧道工程局有限公司 | Method for chiseling away cast-in-place pile head concrete rapidly |
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| JP2003342951A (en) * | 2002-05-30 | 2003-12-03 | Yamada Yuka | Construction method for treatment of pile head of cast- in-place pile, and cushion material and concrete destroying device for use in the same |
| CN102518124A (en) * | 2011-11-30 | 2012-06-27 | 中交隧道工程局有限公司 | Method for chiseling away cast-in-place pile head concrete rapidly |
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