CN110847171A - Construction method for integrally cutting off unset concrete pile head - Google Patents
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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
- E02D9/005—Removing sheet piles bulkheads, piles, mould-pipes or other moulds or parts thereof removing the top of placed piles of sheet piles
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Abstract
The invention relates to a construction method for integrally cutting off an unset concrete pile head, which is characterized by comprising the following steps of: s1: a protection measure, namely sleeving PVC sleeves on the reinforcing steel bars above the elevation, and blocking the upper and lower openings of the sleeves by soft elastic materials; s2: primarily pouring concrete; s3: punching a steel bar, namely, enabling the steel bar to penetrate through round holes in corresponding positions and layers on the single-ring porous ring body; s4: adjusting and sealing the round hole; s5: placing the device; s6: filling a pile head; s7: dividing the concrete; s8: collecting waste materials; s9: a cleaning device; s10: maintaining the fan-shaped blade, spraying hot air from the water spraying air holes, and drying the fan-shaped blade and residual moisture in the gap of the fan-shaped blade; s11: recovering the PVC sleeve; the round holes in the single-ring porous circular ring body can be penetrated by reinforcing steel bars with different layers, redundant round holes can be sealed by adjusting the sliding blocks, the single-ring porous circular ring can be suitable for concrete piles with different layers, positions and diameters of the reinforcing steel bars, and the single-ring porous circular ring body is high in flexibility and wide in application range.
Description
Technical Field
The invention belongs to the technical field of civil engineering construction, and particularly relates to a construction method for integrally cutting off an unset concrete pile head.
Background
In the process of pouring the concrete cast-in-place pile, as the cement paste returns upwards and rises together with air bubbles in the concrete due to vibration, laitance is formed in a certain range of the pile top, and the strength of the concrete at the pile head part is difficult to ensure; in addition, when underwater concrete is poured, slurry and mortar mixtures at the pile head part are most accumulated, so that the concrete at the pile head part is relatively loose, and the strength of the concrete cannot meet the requirement. Therefore, the actual elevation requirement of the pile head of the concrete cast-in-place pile is higher than the design elevation by 500-1000mm during construction, and the higher part is broken manually or mechanically, and is generally called as a "pile chiseling head" or a "pile breaking head".
At present, the pile head is dug manually, useless concrete above the pile mark is broken by an air pick or other cutting equipment, and then main reinforcements in a reinforcement cage are stripped. Mechanical pile cutting head uses a plurality of modules to make up together and adapts to not equidimension stake, with a plurality of modules parallelly connected carry out the simultaneous extrusion through hydraulic line to the same cross-section of stake around the stake to the realization is to the fracture of this cross-section concrete, this kind of method can be because the position of reinforcing bar owner muscle and the device that the quantity is different and need the difference, the flexibility is poor, produces a large amount of concrete pieces simultaneously, difficult clearance.
Disclosure of Invention
The invention aims to provide a construction method for integrally cutting off an unset concrete pile head, and aims to solve the problems that in the existing concrete cast-in-place pile head cutting-off process, the pile head cutting-off construction strength is high, the efficiency is low, the damage to reinforcing steel bars is large, and the environmental pollution is easily caused.
In order to achieve the purpose, the invention provides the following technical scheme: a construction method for integrally cutting off an unset concrete pile head is characterized by comprising the following steps:
s1, protective measures: for the concrete pile to be poured, a PVC sleeve is sleeved on the reinforcing steel bar above the elevation, the upper opening and the lower opening of the sleeve are blocked by soft elastic materials and used for fixing the PVC sleeve and preventing concrete from permeating into the pipe, so that the reinforcing steel bar and the concrete can be separated at the later stage;
s2, concrete primary pouring: pouring the mixed concrete material into a mould of the concrete pile, compacting the concrete by using a vibration pump, and stopping pouring when the concrete is poured to a position 50-100mm above the elevation of the pile;
s3, punching steel bars: for a concrete pile with one to three layers of steel bars, after the concrete is initially poured, the steel bars penetrate through the round holes 2 at corresponding positions and layers on the single-ring porous ring body 3;
s4: adjusting and sealing the round hole: after the reinforcing steel bars pass through the round holes 2 at the corresponding positions and the layers, the sliding blocks 9 are adjusted by rotating different structural rings on the single-ring porous circular ring body 3, so that the round holes 2 through which no reinforcing steel bars pass are closed as much as possible, and the concrete is prevented from seeping when the concrete above the elevation is recycled;
s5: placing the device: after the round hole 2 is adjusted, slowly placing the device on the surface of the preliminarily poured concrete pile, and starting a micro-vibrator 11 in the rectangular steel sheet 5 to make the device sink to the position near the elevation of the concrete by vibration;
s6: filling a pile head: after the device is placed, concrete is continuously poured on the initially poured concrete pile, the micro-vibrator 11 is started at the same time, the device is leveled, the concrete surface can be approximately divided smoothly, and the concrete near the device is vibrated and compacted by matching with a vibration pump, so that the concrete at the elevation meets the strength requirement, and the filling work can be stopped when the concrete is poured to the height above 500-plus-1000 mm;
s7: concrete splitting: starting a motor 15 arranged at the upper end of the power support 4 to drive the power support 4 to rotate, further driving the fan-shaped blades 8 positioned at the bottom layer to be unfolded, and enabling the rest fan-shaped blades 8 to be sequentially unfolded through linkage of the blade elastic convex points 12 at the edge of the fan-shaped blades and the blade small holes 13 to divide the concrete pile into an upper part and a lower part near the elevation;
s8: waste material collection: taking away the device and the excessive unset concrete materials above the device by a crane through a lifting ring 7, collecting the concrete materials and recycling the unset concrete when necessary;
s9: the cleaning device is used for cleaning the fan-shaped blade 8 and adjusting the reverse direction of the motor 15 to recover the fan-shaped blade 8, and in the process, the power bracket 4 and the water spraying air holes 6 on the rectangular steel sheet 5 spray water to clean the fan-shaped blade 8 and the concrete residues between the fan-shaped blade 8 and the gaps; the whole cleaning is carried out, concrete residues on the parts such as the single-ring porous ring body 3, the power support 4 and the like are cleaned, and the normal use of the device is ensured;
s10, curing the fan-shaped blade 8: after the device is cleaned, the power support 4 and a water-air pipe in the rectangular steel sheet 5 are externally connected with a hot air blower, meanwhile, the fan-shaped blades 8 are repeatedly unfolded and folded, hot air is sprayed out from the holes of the water-air pipe 6, and residual moisture in the fan-shaped blades 8 and gaps thereof is dried to prevent the fan-shaped blades 8 and the gaps thereof from being damaged at the later stage;
s11: PVC sleeve recovery: and after the construction is finished, taking out the PVC sleeve sleeved on the steel bar, cleaning concrete residues on the surface of the PVC sleeve, and recovering the concrete residues for subsequent recycling.
Preferably, the adjusting of the circular hole in step S1 is performed by: place the device on concrete pile head, the reinforcing bar passes round hole 2 on the porous tourus of monocycle 3, according to the quantity and the position of reinforcing bar, adjust slider 9 through rotating the different structure rings on the porous tourus of monocycle 3, seal unnecessary round hole 2, prevent later stage concrete and ooze upward, for guaranteeing that round hole 2 can supply reinforcing bar and PVC sleeve pipe to pass, the sheathed tube diameter of PVC is controlled at 18-20mm, and the diameter control of round hole is 22-26mm, can adapt to the required steel bar diameter of engineering.
Preferably, the leveling operation in step S6 is performed by: according to the leveling condition of the device in the concrete filling process, the corresponding micro-vibrator 11 in the rectangular steel sheet 5 is started to level the device, and level identification can be carried out according to the level air bubble 10 at the upper end of the power bracket 4.
Preferably, when the device is placed in step S5, the fan-shaped blade 8 and the fan-shaped blade box 1 have a certain thickness, which can be controlled within 50mm, and the device is finally placed within 50mm below the concrete level.
Compared with the prior art, the invention has the following beneficial effects: (1) according to the construction method, the reinforcing steel bars in the unset concrete pile head pass through the round holes in different layers and positions in the device according to the layer number and the position of the reinforcing steel bars in the unset concrete pile head, the positions of the sliding blocks are adjusted by rotating different structural rings of the single-ring porous annular body, redundant round holes are sealed, the construction method can be suitable for concrete piles with different reinforcing steel bar layer numbers, positions and diameters, and is high in flexibility and wide in application range.
(2) The construction method utilizes the combination of the fan-shaped blade and the single-ring porous ring body to remove the unset concrete integrally. The fan-shaped blade is sequentially unfolded through the linkage of the blade elastic salient points on the edge of the fan-shaped blade and the small holes of the blade to form an approximate circular plane, and the fan-shaped blade is combined with a single-ring porous ring body with the width exceeding the sum of the thickness of a concrete pile protective layer and the diameter of a steel bar, so that the concrete at the elevation position can be simply and efficiently divided into an upper part and a lower part, the whole concrete above the elevation can be conveniently removed in the later period, the cross section is approximately flat, the construction efficiency is high, the construction period is shortened, and the cost is low.
(3) According to the construction method, after the concrete is poured by 50-100mm above the elevation, the adjusted device is placed on the surface of the concrete, the micro-vibrator is started to vibrate the device to sink to the position near the elevation, and the micro-vibrator is started to level the device when the concrete is grouted, so that the concrete near the elevation can be effectively vibrated to be compact, and the engineering requirements can be met.
(4) After concrete is cut off, the water spraying air holes spray water to repeatedly clean the fan-shaped blades and concrete residues on the fan-shaped blades and the components so as to be used normally, and after the cleaning is finished, the water spraying air holes spray hot gas to dry the fan-shaped blades and the components, so that the maintenance effect is achieved, and the fan-shaped blades and the components are prevented from being damaged at the later stage.
(5) According to the construction method, the PVC sleeve is used for sheathing the reinforcing steel bars above the elevation before concrete pouring, so that the reinforcing steel bars and the concrete are kept independent, the problem that the concrete above the elevation is difficult to remove due to the fact that the reinforcing steel bars and the concrete are connected into a whole in the concrete pouring can be solved, the PVC sleeve is cleaned and recycled after the construction is completed, recycling is facilitated, and the engineering cost can be reduced.
(6) According to the construction method, the blade elastic convex points and the blade small holes are arranged on the edges of the fan-shaped blades, the blade elastic convex points and the blade small holes correspond in position quantity, when the blade elastic convex points and the blade small holes are overlapped, the adjacent fan-shaped blades can be in linkage unfolding and folding, the fan-shaped blade at the bottommost layer is driven to unfold through the transmission shaft, the adjacent fan-shaped blades are driven to unfold when the blade elastic convex points at the edge of the blade elastic convex points and the blade small holes at the edge of the adjacent fan-shaped blades are overlapped, the linkage effect is sequentially recurred until the fan-shaped blades unfold to form an approximate plane, folding and shrinking of the fan-shaped blades can be achieved, the.
(7) According to the construction method, the concrete is cut off before being solidified, so that dust and noise can be reduced, concrete residues are prevented from splashing, the health and safety of constructors are guaranteed, the cut and left unset concrete can be reused when necessary, secondary cleaning of the concrete is avoided, and engineering waste is reduced.
Drawings
Fig. 1 is an overall view of a construction apparatus of the present invention;
FIG. 2 is a schematic view of the bottom surface of the single ring porous torus of the construction apparatus of the present invention in an initial state;
FIG. 3 is a schematic view of the bottom surface of the construction device of the present invention with a single ring porous torus circular hole adjustment;
FIG. 4 is a cross-sectional view of a single ring porous torus of the construction apparatus of the present invention;
FIG. 5 is a view showing the fan-shaped blade spreading effect of the construction apparatus according to the present invention;
fig. 6 is a schematic view illustrating a fan-shaped blade expanding and contracting process of the construction apparatus according to the present invention;
FIG. 7 is a view showing the effect of the fan blade linkage of the construction apparatus according to the present invention;
FIG. 8 is a schematic view of a rectangular steel sheet of the construction apparatus of the present invention;
FIG. 9 is a schematic view of a slide of the construction apparatus of the present invention;
FIG. 10 is a construction effect diagram of the construction device according to the present invention.
In the figure: 1-fan-shaped blade box, 2-round hole, 3-single ring porous ring body, 4-power support, 5-rectangular steel sheet, 6-water spraying air hole, 7-hanging ring, 8-fan-shaped blade, 9-sliding block, 10-leveling air bubble, 11-micro vibrator, 12-blade elastic salient point, 13-blade small hole, 14-supporting frame and 15-motor.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-10, the present invention provides the following technical solutions: a construction method for integrally cutting off an unset concrete pile head is characterized by comprising the following steps:
s1, protective measures: for the concrete pile to be poured, a PVC sleeve is sleeved on the reinforcing steel bar above the elevation, the upper opening and the lower opening of the sleeve are blocked by soft elastic materials and used for fixing the PVC sleeve and preventing concrete from permeating into the pipe, so that the reinforcing steel bar and the concrete can be separated at the later stage;
s2, concrete primary pouring: pouring the mixed concrete material into a mould of the concrete pile, compacting the concrete by using a vibration pump, and stopping pouring when the concrete is poured to a position 50-100mm above the elevation of the pile;
s3, punching steel bars: for a concrete pile with one to three layers of steel bars, after the concrete is initially poured, the steel bars penetrate through the round holes 2 at corresponding positions and layers on the single-ring porous ring body 3; s4: adjusting and sealing the round hole: after the reinforcing steel bars pass through the round holes 2 at the corresponding positions and the layers, the sliding blocks 9 are adjusted by rotating different structural rings on the single-ring porous circular ring body 3, so that the round holes 2 through which no reinforcing steel bars pass are closed as much as possible, and the concrete is prevented from seeping when the concrete above the elevation is recycled; s5: placing the device: after the round hole 2 is adjusted, slowly placing the device on the surface of the preliminarily poured concrete pile, and starting a micro-vibrator 11 in the rectangular steel sheet 5 to make the device sink to the position near the elevation of the concrete by vibration;
s6: filling a pile head: after the device is placed, concrete is continuously poured on the initially poured concrete pile, the micro-vibrator 11 is started at the same time, the device is leveled, the concrete surface can be approximately divided smoothly, and the concrete near the device is vibrated and compacted by matching with a vibration pump, so that the concrete at the elevation meets the strength requirement, and the filling work can be stopped when the concrete is poured to the height above 500-plus-1000 mm;
s7: concrete splitting: starting a motor 15 arranged at the upper end of the power support 4 to drive the power support 4 to rotate, further driving the fan-shaped blades 8 positioned at the bottom layer to be unfolded, and enabling the rest fan-shaped blades 8 to be sequentially unfolded through linkage of the blade elastic convex points 12 at the edge of the fan-shaped blades and the blade small holes 13 to divide the concrete pile into an upper part and a lower part near the elevation;
s8: waste material collection: taking away the device and the excessive unset concrete materials above the device by a crane through a lifting ring 7, collecting the concrete materials and recycling the unset concrete when necessary;
s9: the cleaning device is used for cleaning the fan-shaped blade 8 and adjusting the reverse direction of the motor 15 to recover the fan-shaped blade 8, and in the process, the power bracket 4 and the water spraying air holes 6 on the rectangular steel sheet 5 spray water to clean the fan-shaped blade 8 and the concrete residues between the fan-shaped blade 8 and the gaps; the whole cleaning is carried out, concrete residues on the parts such as the single-ring porous ring body 3, the power support 4 and the like are cleaned, and the normal use of the device is ensured;
s10, curing the fan-shaped blade 8: after the device is cleaned, the power support 4 and a water-air pipe in the rectangular steel sheet 5 are externally connected with a hot air blower, meanwhile, the fan-shaped blades 8 are repeatedly unfolded and folded, hot air is sprayed out from the holes of the water-air pipe 6, and residual moisture in the fan-shaped blades 8 and gaps thereof is dried to prevent the fan-shaped blades 8 and the gaps thereof from being damaged at the later stage;
s11: PVC sleeve recovery: and after the construction is finished, taking out the PVC sleeve sleeved on the steel bar, cleaning concrete residues on the surface of the PVC sleeve, and recovering the concrete residues for subsequent recycling.
Preferably, the adjusting of the circular hole in step S1 is performed by: place the device on concrete pile head, the reinforcing bar passes round hole 2 on the porous tourus of monocycle 3, according to the quantity and the position of reinforcing bar, adjust slider 9 through rotating the different structure rings on the porous tourus of monocycle 3, seal unnecessary round hole 2, prevent later stage concrete and ooze upward, for guaranteeing that round hole 2 can supply reinforcing bar and PVC sleeve pipe to pass, the sheathed tube diameter of PVC is controlled at 18-20mm, and the diameter control of round hole is 22-26mm, can adapt to the required steel bar diameter of engineering.
Preferably, the leveling operation in step S6 is performed by: according to the leveling condition of the device in the concrete filling process, the corresponding micro-vibrator 11 in the rectangular steel sheet 5 is started to level the device, and level identification can be carried out according to the level air bubble 10 at the upper end of the power bracket 4.
Preferably, when the device is placed in step S5, the fan-shaped blade 8 and the fan-shaped blade box 1 have a certain thickness, which can be controlled within 50mm, and the device is finally placed within 50mm below the concrete level. The utility model provides a whole porous construction equipment of monocycle of cutting unset concrete pile head, includes fan-shaped blade box 1, the porous tourus of monocycle 3, power support 4, its characterized in that: the fan-shaped blade box 1 is movably connected with a power support 4, a single-ring porous ring body 3 is fixedly connected with the fan-shaped blade box 1, the lower part of the power support 4 is connected with the single-ring porous ring body 3 through a rectangular steel sheet 5, a water-air pipe is arranged inside the power support 4 and the rectangular steel sheet 5, the single-ring porous ring body 3 adopts a three-ring bearing structure, a plurality of round holes 2 are arranged on an intermediate ring, a slide block 9 is arranged on the bottom surface of the single-ring porous ring body 3, the slide blocks 9 are in wedge connection, the slide blocks 9 on two sides are fixedly connected with the single-ring porous ring body 3 at corresponding positions, the fan-shaped blade box 1 is connected between the power support 4 and the single-ring porous ring body 3, a fan-shaped blade set is placed inside the fan-shaped blade box 1 and comprises a plurality of fan-shaped blades 8, the edge positions of the fan-shaped blades 8, the other fan-shaped blades 8 are rotatably connected with the power bracket 4 through bearings. The width of the single-ring porous torus 3 exceeds the sum of the thickness of the concrete pile protective layer and the diameter of the steel bar, and the diameter of the round hole 2 is controlled to be 22-26mm, so that the single-ring porous torus can adapt to the diameter of the steel bar required by engineering. A plurality of fan-shaped blade 8 superposes and places, the upper surface inner edge of fan-shaped blade 8 is provided with blade elasticity bump 12, the bottom surface outward flange of fan-shaped blade 8 is along being provided with the blade aperture 13 corresponding with blade elasticity bump 12, and adjacent fan-shaped blade 8 accessible blade elasticity bump 12 and the linkage of blade aperture 13 are opened and shut. A water-through air pipe and a micro-vibrator 11 are arranged in the rectangular steel sheet 5, and water-spraying air holes 6 are arranged on the side surface and the bottom surface of the rectangular steel sheet 5. The lower end of the power bracket 4, the side surface and the bottom surface of the rectangular steel sheet 5 are respectively provided with a water spraying air hole 6, and the water spraying air holes 6 are connected to a water through air pipe inside the power bracket 4 through pipelines. The outside of power support 4 is passed through bearing and 5 rotatable connections of one end of rectangular steel sheet, and the other end and the porous tourus 3 fixed connection of monocycle of rectangular steel sheet 5, rectangular steel sheet 5 are provided with a plurality of, and a plurality of rectangular steel sheet 5 is the annular array form evenly distributed on the inner ring of the porous tourus 3 of monocycle. The sliding block 9 is formed by sequentially connecting three steel sheets in a wedge type manner, and two steel sheets on the outer side of the three steel sheets are respectively and fixedly connected with the inner ring and the outer ring of the single-ring porous torus 3. The upper end of the power bracket 4 is provided with a leveling bubble 10 and a hanging ring 7, and the lower end of the power bracket 4 is provided with a water spraying air hole 6 which inclines upwards. The motor 15 is installed on the top of the power support 4, the motor 15 is rotatably connected with the power support 4 through a rotating shaft, and the outer side of the motor 15 is fixed in position through a support frame 14 which can be carried on a concrete mould. The power support 4 and the water and air pipe inside the rectangular steel sheet 5 are externally connected with a high-pressure water source when the fan-shaped blade 8 is cleaned, and are externally connected with an air heater after the fan-shaped blade 8 is cleaned.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation. The use of the phrase "comprising one of the elements does not exclude the presence of other like elements in the process, method, article, or apparatus that comprises the element.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (4)
1. A construction method for integrally cutting off an unset concrete pile head is characterized by comprising the following steps:
s1, protective measures: for the concrete pile to be poured, a PVC sleeve is sleeved on the reinforcing steel bar above the elevation, the upper opening and the lower opening of the sleeve are blocked by soft elastic materials and used for fixing the PVC sleeve and preventing concrete from permeating into the pipe, so that the reinforcing steel bar and the concrete can be separated at the later stage;
s2, concrete primary pouring: pouring the mixed concrete material into a mould of the concrete pile, compacting the concrete by using a vibration pump, and stopping pouring when the concrete is poured to a position 50-100mm above the elevation of the pile;
s3, punching steel bars: for the concrete pile with one to three layers of steel bars, after the concrete is initially poured, the steel bars penetrate through the round holes (2) at the corresponding positions and the layers on the single-ring porous ring body (3);
s4: adjusting and sealing the round hole: after the reinforcing steel bars pass through the round holes (2) at the corresponding positions and the layers, different structural rings on the single-ring porous circular ring body (3) are rotated to adjust the sliding block (9), the round holes (2) through which no reinforcing steel bars pass are closed, and the concrete is prevented from seeping when the concrete above the elevation is recycled;
s5: placing the device: after the round hole (2) is adjusted, slowly placing the device on the surface of the preliminarily poured concrete pile, and starting a micro vibrator (11) in the rectangular steel sheet (5) to make the device sink to the position near the elevation of the concrete in a vibrating manner;
s6: filling a pile head: after the device is placed, concrete is continuously poured on the initially poured concrete pile, meanwhile, the micro-vibrator (11) is started to level the device, so that the concrete surface can be approximately divided smoothly, and the concrete near the device is vibrated and compacted by matching with a vibration pump, so that the concrete at the elevation meets the strength requirement, and the filling work can be stopped when the concrete is poured to the height of 500 plus materials of 1000 mm;
s7: concrete splitting: starting a motor (15) arranged at the upper end of the power support (4), driving the power support (4) to rotate, further driving the fan-shaped blades (8) positioned at the bottom layer to be unfolded, and enabling the rest fan-shaped blades (8) to be sequentially unfolded through linkage of blade elastic convex points (12) at the edges of the fan-shaped blades and blade small holes (13) to divide the concrete pile into an upper part and a lower part near the elevation;
s8: waste material collection: the device and the excessive unset concrete materials above the device are taken away by a crane through a lifting ring (7) and are collected, and the unset concrete can be recycled when necessary;
s9: a cleaning device: cleaning the fan-shaped blade (8), adjusting the reverse direction of the motor (15) to recover the fan-shaped blade (8), and spraying water from the power bracket (4) and the water spraying air holes (6) on the rectangular steel sheet (5) in the process to clean the fan-shaped blade (8) and the concrete residues between the fan-shaped blade and the gaps; the whole cleaning is carried out, concrete residues on the parts such as the single-ring porous ring body (3), the power bracket (4) and the like are cleaned, and the follow-up normal use of the device is ensured;
s10, maintenance of the fan-shaped blade (8): after the device is cleaned, the power support (4) and a water-through air pipe in the rectangular steel sheet (5) are externally connected with a hot air blower, meanwhile, the fan-shaped blade (8) is repeatedly unfolded and folded, hot air is sprayed out from the hole of the water-spraying air pipe (6), and residual moisture in the fan-shaped blade (8) and a gap between the fan-shaped blade and the gap is dried to prevent the fan-shaped blade from being damaged at the later stage;
s11: PVC sleeve recovery: and after the construction is finished, taking out the PVC sleeve sleeved on the steel bar, cleaning concrete residues on the surface of the PVC sleeve, and recovering the concrete residues for subsequent recycling.
2. The construction method for integrally cutting off the unset concrete pile head according to claim 1, wherein: the round hole adjustment in the step S1 is performed in the following manner: place the device on concrete pile head, the reinforcing bar passes round hole (2) on the porous tourus of monocycle (3), according to the quantity and the position of reinforcing bar, adjust slider (9) through rotating different structure rings on the porous tourus of monocycle (3), seal unnecessary round hole (2), prevent later stage concrete and upwards ooze, can supply reinforcing bar and PVC sleeve pipe to pass for guaranteeing round hole (2), the sheathed tube diameter control of PVC is 18-20mm, the diameter control of round hole is 22-26mm, can adapt to the required steel bar diameter of engineering.
3. The construction method for integrally cutting off the unset concrete pile head according to claim 1, wherein: the leveling operation in step S6 is performed by: according to the leveling condition of the device in the concrete filling process, a micro-vibrator (11) in the corresponding rectangular steel sheet (5) is started to level the device, and level identification can be carried out according to a level bubble (10) at the upper end of the power support (4).
4. The construction method for integrally cutting off the unset concrete pile head according to claim 1, wherein: when the device is placed in the step S5, the fan-shaped blades (8) and the fan-shaped blade box (1) have a certain thickness, the thickness can be controlled within 50mm, and the device is finally placed within 50mm below the concrete elevation.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113123339A (en) * | 2021-04-30 | 2021-07-16 | 南京农业大学 | Quick breaking structure for super-grouting part of pile top of cast-in-place pile |
| CN113250186A (en) * | 2021-04-14 | 2021-08-13 | 中冶京诚工程技术有限公司 | Cast-in-place concrete pile head separation device and pile head breaking method |
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| US4619556A (en) * | 1983-11-14 | 1986-10-28 | Parra Ernest P | Method and apparatus for severing a tubular member |
| JPS6187020A (en) * | 1984-10-03 | 1986-05-02 | Nippon Kokan Kk <Nkk> | Cutter for steel pipe sheet pile |
| CN106836222A (en) * | 2017-02-14 | 2017-06-13 | 王本勋 | A kind of high ferro cushion cap pile crown girdling machine |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113250186A (en) * | 2021-04-14 | 2021-08-13 | 中冶京诚工程技术有限公司 | Cast-in-place concrete pile head separation device and pile head breaking method |
| CN113123339A (en) * | 2021-04-30 | 2021-07-16 | 南京农业大学 | Quick breaking structure for super-grouting part of pile top of cast-in-place pile |
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| CN110847171B (en) | 2021-06-18 |
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