CN111236233B - Method for removing pile head floating slurry of cast-in-place pile - Google Patents
Method for removing pile head floating slurry of cast-in-place pile Download PDFInfo
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- CN111236233B CN111236233B CN202010084115.9A CN202010084115A CN111236233B CN 111236233 B CN111236233 B CN 111236233B CN 202010084115 A CN202010084115 A CN 202010084115A CN 111236233 B CN111236233 B CN 111236233B
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D13/00—Accessories for placing or removing piles or bulkheads, e.g. noise attenuating chambers
- E02D13/08—Removing obstacles
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
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Abstract
The invention relates to a method for removing pile head laitance of a cast-in-place pile, which belongs to the technical field of cast-in-place pile construction. And then the floating frame assembly fixed with the slurry discharge pipe and the high-pressure air supply pipe is placed in the pile hole, so that the lower ends of the slurry discharge pipe and the high-pressure air supply pipe are immersed in the floating slurry. The floating frame assembly is suspended on floating slurry through a plurality of floating balls at the lower end of the slurry discharge pipe positioning underframe until the floating frame assembly is in contact with the pile steel bars to be induced and limited, and the floating frame assembly is guided to move by adopting a row stable guide wheel assembly. And finally, opening an air compressor connected with the high-pressure air supply pipe on the equipment platform frame, and discharging the fluid slurry and the floating slurry from the slurry discharge pipe to the ground through the high-pressure air of the high-pressure air supply pipe. Has the advantages of simple structure, time and labor saving, good construction stability and short period. Ensure that only the slurry is blown out and the useful concrete aggregate is not brought out.
Description
Technical Field
The invention relates to the technical field of cast-in-place pile construction, in particular to a method for removing pile head laitance of a cast-in-place pile.
Background
The cast-in-place pile is a pile formed by forming a hole in place and pouring concrete or reinforced concrete. Commonly used are:
(1) drilling a cast-in-place pile: the pile is formed by using a spiral drilling machine, a diving drilling machine and the like to form holes on site and pouring concrete, and the construction has no vibration and does not squeeze soil, but the settlement amount of the pile is slightly larger. The auger drilling machine is suitable for cohesive soil, sandy soil, artificial filling and the like above the ground water level, drilled soil blocks ascend along spiral blades on a drill rod to the outside of a discharge hole, the aperture is about 300mm, the drilling depth is 8-12 m, and the drill rod is selected according to soil quality and water content. The submersible drilling machine is suitable for cohesive soil, sandy soil, silt, mucky soil and the like, and is particularly suitable for forming holes in soil layers with higher underground water level. The mud is used for protecting the wall in order to prevent the hole from collapsing when drilling.
Drilling in clay with clean water, self-made mud protecting wall: prepared mud is injected into sandy soil for drilling. And circularly removing drilled soil scraps by using slurry, and cleaning the hole after the hole is drilled to the required depth to remove the soil scraps sinking at the bottom of the hole, so that the settling amount of the pile is reduced. The large-diameter cast-in-situ bored pile popularized and applied in large-scale projects such as high-rise buildings, bridges and the like is constructed by the method, the diameter of the pile is more than 1m, the bottom of the pile can be expanded, and the bearing capacity of a single pile can reach thousands of tons.
(2) Sinking a pipe and pouring a pile: the steel pipe with reinforced concrete pile shoe (pile tip) or valve type pile shoe is sunk into the soil by hammering or vibration, then concrete is poured in and the pipe is pulled out simultaneously to form the pile. The hammer pipe sinking and pipe drawing are called hammer cast-in-place pile, and the vibration pipe sinking and pipe drawing are called vibration cast-in-place pile. The method is easy to cause the defects of pile breaking, necking, foot hanging pile, pile shoe water inlet, mud inlet and the like, and the inspection and the timely treatment are noticed during the construction. In addition, explosive expanding cast-in-place piles are provided, which are formed by expanding the bottom of a pile hole with explosive to increase the bearing capacity.
When the conventional cast-in-place pile is constructed, after concrete is poured to the elevation of the pile top, because the sequela of mud, laitance and the like of the concrete of the pile head part is worried about, the conventional method is to adopt concrete over-pouring, namely, the concrete is continuously poured for about 1m to 1.5m after the elevation of the pile head, and impurities such as mud, laitance and the like are artificially extruded to be high. After the concrete is hardened and the pile is dug out, the floating slurry and the concrete over-poured are chiseled off. The labor and materials are wasted, and the pile head reinforcing steel bars and the reserved concrete are easily damaged when the concrete is chiseled.
Disclosure of Invention
The invention mainly solves the defects of labor and material waste, easy damage to pile head reinforcing steel bars, reserved concrete and long period in the prior art, and provides a method for removing pile head laitance of a cast-in-place pile, which has the advantages of simple structure, time and labor saving, good construction stability and short period. Ensure that only the slurry is blown out and the useful concrete aggregate is not brought out.
The technical problem of the invention is mainly solved by the following technical scheme:
a method for removing floating slurry at the pile head of a cast-in-place pile comprises the following operation steps:
the first step is as follows: firstly, a pile hole is drilled, pile reinforcing steel bars are placed into the pile hole, concrete is poured into the pile hole, so that the lower part of the pile hole is filled with the concrete to form a pile body, and meanwhile, slurry and concrete laitance are formed at the upper part of the pile hole.
The second step is that: and then the floating frame assembly fixed with the slurry discharge pipe and the high-pressure air supply pipe is placed in the pile hole, so that the lower ends of the slurry discharge pipe and the high-pressure air supply pipe are immersed in the floating slurry.
The third step: the floating frame assembly is suspended on floating slurry through a plurality of floating balls at the lower end of the slurry discharge pipe positioning underframe until the floating frame assembly is in contact with the pile steel bars to be induced and limited, and meanwhile, the floating frame assembly conducts guiding displacement by adopting a stable guide wheel assembly around the slurry discharge pipe positioning underframe.
The fourth step: and opening an air compressor connected with the high-pressure air supply pipe on the equipment platform frame, and discharging the fluid slurry and the floating slurry from the slurry discharge pipe to the ground through the high-pressure air of the high-pressure air supply pipe. The equipment platform frame is in lifting elastic connection with the platform bottom plate through the platform panel, and the equipment platform frame is fixedly connected with the slurry discharge pipe positioning underframe through the connecting frame.
Preferably, the platform panel is matched with the platform bottom plate through a plurality of lifting springs and floating balls.
Preferably, the connecting frame is supported and fixed by a reinforcing brace.
Preferably, the high-pressure air supply pipe is hooked into the lower end port of the pulp discharge pipe in a J shape, and the pulp discharge pipe and the high-pressure air supply pipe are fixed by a pipe fitting hoop.
Preferably, the high-pressure air supply pipe is connected with the air compressor through an air pipe valve for control.
Preferably, the slurry discharge pipe adopts a slurry discharge connecting flange to output the floating slurry, and the slurry discharge pipe and the platform panel are installed and fixed through a pipe sleeve seat.
Preferably, the stable guide wheel assembly is in hinged sleeve joint with the slurry discharge pipe positioning underframe through a swing angle shaft by a roller lug plate, a roller in contact with the inner wall of the pile hole is arranged at the front end of the roller lug plate, and the roller lug plate are in limited sleeve joint through a movable clamp spring by a roller shaft.
Preferably, the roller shaft and the roller ear plate are in waist circle type embedded sleeve connection, the roller spring is connected with the swing angle shaft and the roller shaft, and the swing angle adjustment is ensured between the roller spring and the swing angle shaft and between the roller spring and the roller shaft through bearings.
The invention can achieve the following effects:
compared with the prior art, the method for removing the pile head laitance of the cast-in-place pile has the advantages of simple structure, time and labor conservation, good construction stability and short period. Ensure that only the slurry is blown out and the useful concrete aggregate is not brought out.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a schematic structural view of the floating frame assembly of the present invention.
Figure 3 is a schematic diagram of the configuration of the equipment platform shelf of the present invention.
Fig. 4 is a schematic structural view of the stabilized guide wheel assembly of the present invention.
In the figure: the device comprises an air compressor 1, an air pipe valve 2, a high-pressure air supply pipe 3, a pipe fitting hoop 4, a slurry discharge pipe 5, a pipe sleeve seat 6, a slurry discharge connecting flange 7, a pile hole 8, a floating frame assembly 9, slurry floating 10, pile reinforcing steel bars 11, a pile body 12, an equipment platform frame 13, a connecting frame 14, a reinforcing support rod 15, a slurry discharge pipe positioning underframe 16, a floating ball 17, a stable guide wheel assembly 18, a platform panel 19, a lifting spring 20, a platform bottom plate 21, a roller lug plate 22, a swing angle shaft 23, a bearing 24, a roller spring 25, a roller shaft 26 and a roller 27.
Detailed Description
The technical scheme of the invention is further specifically described by the following embodiments and the accompanying drawings.
Example (b): as shown in fig. 1-4, a method for removing floating slurry from a pile head of a cast-in-place pile comprises the following operation steps:
the first step is as follows: firstly, a pile hole 8 is drilled, pile reinforcing steel bars 11 are placed into the pile hole 8, concrete is poured into the pile hole 8, so that the lower part of the pile hole 8 is filled with the concrete to form a pile body 12, and meanwhile, floating slurry 10 of mud and concrete is formed at the upper part of the pile hole 8.
The second step is that: the pontoon assembly 9 with the mud pipe 5 and the high pressure gas feed pipe 3 fixed thereto is then placed into the pile hole 8 such that the lower ends of the mud pipe 5 and the high pressure gas feed pipe 3 are immersed in the laitance 10. The high-pressure air supply pipe 3 is hooked into the lower end opening of the pulp discharge pipe 5 in a J shape, and the pulp discharge pipe 5 and the high-pressure air supply pipe 3 are fixed by a pipe fitting hoop 4.
The equipment platform frame 13 is in lifting elastic connection with the platform bottom plate 21 by adopting a platform panel 19, and the equipment platform frame 13 is fixedly connected with the slurry discharge pipe positioning underframe 16 through a connecting frame 14. The connecting frame 14 is supported and fixed by reinforcing struts 15. The platform panel 19 is matched with the platform bottom plate 21 through 38 lifting springs 20 and floating balls 17.
The third step: the floating frame assembly 9 is suspended on the floating slurry 10 through 56 floating balls 17 at the lower end of the slurry discharge pipe positioning underframe 16 until the floating frame assembly is in contact with the pile steel bars 11 for induction and limitation, and meanwhile, the floating frame assembly 9 adopts a stable guide wheel assembly 18 around the slurry discharge pipe positioning underframe 16 for guide displacement.
The stable guide wheel assembly 18 is hinged and sleeved with the slurry discharge pipe positioning underframe 16 through a roller ear plate 22 by adopting a swing angle shaft 23, a roller 27 in contact with the inner wall of the pile hole 8 is arranged at the front end of the roller ear plate 22, and the roller 27 and the roller ear plate 22 are limited and sleeved by a movable clamp spring through a roller shaft 26. The roller shaft 26 and the roller ear plate 22 are in a waist circle type embedded and sleeved connection, the roller spring 25 is connected with the swing angle shaft 23 and the roller shaft 26, and the swing angle adjustment is ensured between the roller spring 25 and the swing angle shaft 23 and between the roller spring 25 and the roller shaft 26 through the bearing 24.
The fourth step: and (3) opening the air compressor 1 connected with the high-pressure air supply pipe 3 on the equipment platform frame 13, and controlling the connection of the high-pressure air supply pipe 3 and the air compressor 1 through an air pipe valve 2. The high pressure gas through the high pressure feed pipe 3 discharges the fluid slurry and laitance from the slurry discharge pipe 5 to the ground. The slurry discharging pipe 5 adopts a slurry discharging connecting flange 7 to output the floating slurry 10, and the slurry discharging pipe 5 and the platform panel 19 are fixedly installed through a pipe sleeve seat 6.
In conclusion, the method for removing the pile head floating slurry of the cast-in-place pile has the advantages of simple structure, time and labor conservation, good construction stability and short period. Ensure that only the slurry is blown out and the useful concrete aggregate is not brought out.
The above description is only an embodiment of the present invention, but the structural features of the present invention are not limited thereto, and any changes or modifications within the scope of the present invention by those skilled in the art are covered by the present invention.
Claims (8)
1. A method for removing pile head laitance of a cast-in-place pile is characterized in that: the method comprises the following operation steps:
the first step is as follows: firstly, a pile hole (8) is drilled, then pile reinforcing steel bars (11) are placed into the pile hole (8), then concrete is poured into the pile hole to fill the lower part of the pile hole (8) and form a pile body (12), and meanwhile, slurry and concrete laitance (10) are formed at the upper part of the pile hole (8);
the second step is that: then, a floating frame assembly (9) fixed with the slurry discharging pipe (5) and the high-pressure air supply pipe (3) is placed in the pile hole (8) so that the lower ends of the slurry discharging pipe (5) and the high-pressure air supply pipe (3) are immersed in the floating slurry (10);
the third step: the floating frame assembly (9) is suspended on the floating slurry (10) through a plurality of floating balls (17) at the lower end of the slurry discharge pipe positioning underframe (16) until the floating frame assembly is in contact with the pile reinforcing steel bar (11) for induction and limiting, and meanwhile, the floating frame assembly (9) adopts a stable guide wheel assembly (18) around the slurry discharge pipe positioning underframe (16) for guide displacement;
the fourth step: opening an air compressor (1) connected with a high-pressure air supply pipe (3) on an equipment platform frame (13), and discharging fluid slurry and floating slurry from a slurry discharge pipe (5) to the ground through high-pressure air of the high-pressure air supply pipe (3); the equipment platform frame (13) is in lifting elastic connection with the platform bottom plate (21) by adopting a platform panel (19), and the equipment platform frame (13) is fixedly connected with the slurry discharge pipe positioning underframe (16) through a connecting frame (14).
2. The method for removing the floating slurry of the pile head of the cast-in-place pile according to claim 1, which comprises the following steps: the platform panel (19) is matched with the platform bottom plate (21) through a plurality of lifting springs (20) and floating balls (17).
3. The method for removing the floating slurry of the pile head of the cast-in-place pile according to claim 1, which comprises the following steps: the connecting frame (14) is supported and fixed through a reinforcing support rod (15).
4. The method for removing the floating slurry of the pile head of the cast-in-place pile according to claim 1, which comprises the following steps: the high-pressure air supply pipe (3) is hooked into the lower end opening of the pulp discharge pipe (5) in a J shape, and the pulp discharge pipe (5) and the high-pressure air supply pipe (3) are fixed by a pipe fitting hoop (4).
5. The method for removing the floating slurry of the pile head of the cast-in-place pile according to claim 1, which comprises the following steps: the high-pressure air supply pipe (3) is connected and controlled with the air compressor (1) through an air pipe valve (2).
6. The method for removing the floating slurry of the pile head of the cast-in-place pile according to claim 1, which comprises the following steps: the slurry discharge pipe (5) adopts a slurry discharge connecting flange (7) to output the floating slurry (10), and the slurry discharge pipe (5) and the platform panel (19) are installed and fixed through a pipe sleeve seat (6).
7. The method for removing the floating slurry of the pile head of the cast-in-place pile according to claim 1, which comprises the following steps: the stable guide wheel assembly (18) is hinged with the slurry discharge pipe positioning chassis (16) through a roller ear plate (22) by adopting a swing angle shaft (23), a roller (27) in contact with the inner wall of the pile hole (8) is arranged at the front end of the roller ear plate (22), and the roller (27) and the roller ear plate (22) are limited and sleeved by a movable clamp spring through a roller shaft (26).
8. The method for removing the floating slurry of the pile head of the cast-in-place pile according to claim 7, wherein: the roller shaft (26) and the roller ear plate (22) are nested and sleeved in a kidney-circle manner, the roller spring (25) is connected with the swing angle shaft (23) and the roller shaft (26), and the swing angle adjustment is ensured between the roller spring (25) and the swing angle shaft (23) and between the roller spring (25) and the roller shaft (26) through the bearing (24).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010084115.9A CN111236233B (en) | 2020-02-10 | 2020-02-10 | Method for removing pile head floating slurry of cast-in-place pile |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010084115.9A CN111236233B (en) | 2020-02-10 | 2020-02-10 | Method for removing pile head floating slurry of cast-in-place pile |
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| CN111236233A CN111236233A (en) | 2020-06-05 |
| CN111236233B true CN111236233B (en) | 2021-04-16 |
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| CN114541398A (en) * | 2022-03-04 | 2022-05-27 | 西安建筑科技大学 | Precast tubular pile depths stake core soil cleaning device |
| CN114991155A (en) * | 2022-06-10 | 2022-09-02 | 刘守勤 | Device and method for pretreating super-poured concrete of underwater concrete pouring pile (wall) |
| CN114991129A (en) * | 2022-06-16 | 2022-09-02 | 广西建工集团第三建筑工程有限责任公司 | Device for quickly removing floating slurry of pile head of cast-in-place pile |
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| CN201447720U (en) * | 2009-05-19 | 2010-05-05 | 江苏河海科技工程集团有限公司 | Deep-water underwater excavating device |
| CN102465536A (en) * | 2010-11-12 | 2012-05-23 | 石峰 | Construction process for cleaning holes in groove section of anti-seepage wall by air-lift method |
| CN103485343B (en) * | 2013-09-03 | 2015-10-21 | 深圳市金世纪工程实业有限公司 | Filling pile head processing method |
| CN203821373U (en) * | 2014-05-13 | 2014-09-10 | 中铁上海工程局集团有限公司 | Slurry gas lift reverse circulation slag removing device |
| CN204199310U (en) * | 2014-10-22 | 2015-03-11 | 中国建筑第八工程局有限公司 | Gas slurry guiding device |
| CN207109819U (en) * | 2017-08-18 | 2018-03-16 | 广州市公路工程公司 | A kind of pile foundation hole cleaning device |
| CN208039840U (en) * | 2018-02-27 | 2018-11-02 | 中国建筑第二工程局有限公司 | Laitance picks boring tool |
| CN208517936U (en) * | 2018-06-27 | 2019-02-19 | 中国葛洲坝集团第三工程有限公司 | A kind of reacting cycle device for pile foundation secondary pile hole cleaning |
| CN109853571B (en) * | 2019-01-04 | 2021-04-30 | 宁莎莎 | Device and method for removing slag at bottom of local gas lift reverse circulation hole before concrete pouring of cast-in-situ bored pile |
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