CN108894232B - Post-grouting device for concrete precast pile and forming method and grouting process thereof - Google Patents
Post-grouting device for concrete precast pile and forming method and grouting process thereof Download PDFInfo
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- CN108894232B CN108894232B CN201810850199.5A CN201810850199A CN108894232B CN 108894232 B CN108894232 B CN 108894232B CN 201810850199 A CN201810850199 A CN 201810850199A CN 108894232 B CN108894232 B CN 108894232B
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
- E02D15/04—Placing concrete in mould-pipes, pile tubes, bore-holes or narrow shafts
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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
- E02D5/50—Piles comprising both precast concrete portions and concrete portions cast in situ
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/003—Injection of material
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- Piles And Underground Anchors (AREA)
Abstract
The invention discloses a post-grouting device for a concrete precast pile, a forming method and a grouting process thereof, which are applied to the field of the concrete precast pile and solve the technical problem that a grouting hole is easy to block in the prior art.
Description
Technical Field
The invention relates to a building pile body, in particular to a post-grouting device for a concrete precast pile, a forming method and a grouting process thereof.
Background
Precast piles are building foundation members manufactured in factories or construction sites, and are made of various materials and in various forms, such as timber piles, concrete square piles, prestressed concrete tubular piles, prestressed concrete hollow square piles, steel piles, and the like, and piles are driven, pressed or vibrated into the soil by pile sinking equipment. In recent years, with the growing shortage of land, civil construction projects are characterized by deep underground and high upper parts, and the requirements on natural foundations are higher and higher.
At present, post grouting used in a construction site is mainly post grouting of a cast-in-place pile, and the cast-in-place pile is a pile formed by forming a pile hole in foundation soil through means of mechanical drilling, steel pipe soil extrusion or manual excavation and the like, placing a steel reinforcement cage in the pile hole and pouring concrete in the pile hole. The invention discloses a precast concrete post-grouting pile and a grouting process, wherein the precast concrete post-grouting pile comprises a post-grouting pile body, a reinforcement cage framework, a flange, a post-grouting groove, a post-grouting pipe, a grouting hole and a pile bottom filler, and the invention can improve the common resistance of soil and the rock soil of the pile, further exert the self bearing capacity of the pile, simultaneously reduce the number of piles and reduce the construction cost; however, in actual grouting, the problems of blockage of grout outlet holes or reverse seepage of grout often occur, and improvement is needed.
Disclosure of Invention
The invention aims to provide a post-grouting device for a concrete precast pile, which can effectively prevent the problem of blockage of a grout outlet or reverse seepage of grout.
The technical purpose of the invention is realized by the following technical scheme:
the utility model provides a slip casting device behind concrete precast pile, includes precast pile body and presets the steel reinforcement cage skeleton in it, be equipped with out thick liquid pipe and a plurality of slip casting pipe in the precast pile body, be equipped with the grout outlet that is linked together with out the thick liquid pipe on the pipe wall of slip casting pipe, the intraductal subassembly that accelerates that is used for accelerating out the grout outlet and spouts the thick liquid that is equipped with of slip casting.
Through adopting above-mentioned technical scheme, to the intraductal slip casting of slip casting, under the acceleration action of acceleration subassembly, can be fast with the thick liquid blowout, effectively prevent at the mud jacking in-process, appear out the problem that the thick liquid hole blocks up or thick liquid reverse osmosis.
The invention is further configured to: the accelerating assembly comprises a hollow tube core arranged in the grouting tube, an umbrella-shaped baffle arranged on the tube core and an air inlet arranged at the top end of the umbrella-shaped baffle, the air inlet is connected with a first air inlet hose and an air pump, an air outlet hole is formed in the outer wall of the tube core and is opposite to the grout outlet hole, a grout falling cavity is formed between the inner wall of the grouting tube and the outer wall of the tube core, and the umbrella-shaped baffle extends to the position above the grout falling cavity.
By adopting the technical scheme, the pneumatic air pump supplies air to the tube core through the first air inlet hose and the air inlet hole, grouting is performed in the grouting pipe, under the guiding action of the umbrella-shaped baffle, slurry is guided to fall down, and is discharged from the slurry outlet hole and the slurry outlet pipe under the impact of air flow, so that the driving action is strong, the guidance performance is accurate, grouting can be rapidly and stably realized, and the blockage and reverse seepage of the slurry outlet hole can be effectively prevented.
The invention is further configured to: the pipe diameter of the grout outlet pipe is larger than the aperture of the grout outlet hole, the grouting pipe is bound on the reinforcement cage framework through an iron wire, and the grout outlet pipe is welded on the grouting pipe.
Through adopting above-mentioned technical scheme, because the air current is great, stronger to the drive action of thick liquid, thick liquid spun direction is comparatively dispersed, and the pipe diameter of injecing out the thick liquid pipe is greater than the aperture in play thick liquid hole, plays the parcel effect in the circumferencial direction to play thick liquid hole, helps improving the stability of a thick liquid process.
The invention is further configured to: be equipped with the adsorption tube on the lateral wall of precast pile body, be equipped with the intake pipe in the precast pile body and the outlet duct that is linked together with the intake pipe, the intake pipe all is greater than the pipe diameter of adsorption tube with the pipe diameter of outlet duct, the intake pipe is equipped with the opening that is linked together with the adsorption tube with the junction of outlet duct, the opening diameter is less than the pipe diameter of adsorption tube, the intake pipe is the turning with the junction of outlet duct, the other end of intake pipe extends to the top of precast pile body and is connected with the second air inlet hose, the other end of outlet duct extends to the bottom of precast pile body.
Through adopting above-mentioned technical scheme, via the second hose of admitting air to the intraductal conveying gas source of admission, the air current discharges fast through the outlet duct, in the exhaust twinkling of an eye, can produce the negative pressure in the adsorption tube, can adsorb soil on the lateral wall of back slip casting device fast to be favorable to improving the cohesive force between back slip casting device and the soil, thereby improve back slip casting device's bearing capacity.
The invention is further configured to: the elevation of the hole bottom of the air outlet hole on the inner wall of the tube core is higher than that of the hole bottom on the outer wall of the tube core.
Through adopting above-mentioned technical scheme, inject the inclination of gas pocket pore wall, play the guide effect to the air current to the blowout direction to the thick liquid is guided.
The invention also aims to disclose a forming method of the concrete precast pile post-grouting device, which comprises the following steps:
(1) installing a tube core in the grouting tube;
(2) placing a reinforcement cage framework in a mold, binding a grouting pipe on the reinforcement cage framework through an iron wire, and welding a grout outlet pipe on the grouting pipe;
(3) binding the adsorption tube, the air inlet tube and the air outlet tube on the grouting tube through iron wires to ensure that the opening is connected with the corners of the air inlet tube and the air outlet tube, and welding the connection parts of the adsorption tube, the air inlet tube and the air outlet tube;
(4) and pouring concrete into the mould to form the post-grouting device.
By adopting the technical scheme, the pipe core is arranged in the grouting pipe, the control on the grout outlet direction is skillfully solved, the structure is simple, the operation is convenient, and the prepared post-grouting device can uniformly spray grout to the surrounding soil; simultaneously, through the intake pipe gas injection, form the negative pressure in the adsorption tube, help soil to adsorb fast on back slip casting device to improve this slip casting device stability and bearing capacity installed underground.
The invention is further configured to: in the step (1), the height of the top end of the tube core is lower than the height of the opening of the grouting tube, and the tube core is in threaded connection with the grouting tube.
By adopting the technical scheme, the umbrella-shaped baffle is arranged at the top end of the tube core, if the height of the umbrella-shaped baffle is higher than the height of the tube opening of the tube core, the grout is easy to scatter outside the grouting tube, the height of the top end of the tube core is lower, and after the umbrella-shaped baffle receives the grout, the grout flows along the direction of the umbrella-shaped baffle, so that the grout can fall into the grout falling cavity quickly and stably, and the grouting stability is improved.
The invention is further configured to: the adsorption tube, the air inlet tube and the air outlet tube are welded with each other.
Through adopting above-mentioned technical scheme, welded structure steadiness is high.
The invention also aims to disclose a grouting process of the post-grouting device for the concrete precast pile, which comprises the following steps:
(1) drilling;
(2) connecting a grouting hose to a grouting pipe, and respectively connecting a first air inlet hose and a second air inlet hose to an air inlet hole and an air inlet pipe;
(3) sinking the post-grouting device into the hole;
(4) and starting the grouting machine and the air pump.
Through adopting above-mentioned technical scheme, before will back slip casting device sink downthehole, in advance with slip casting hose, first air inlet hose and second air inlet hose connect respectively on slip casting pipe, inlet port and intake pipe, realize quick, stable slip casting to this back slip casting device anti bearing capacity is higher.
In conclusion, the invention has the following beneficial effects:
1. the post-grouting device for the concrete precast pile can accelerate the spraying speed of grout, guide the spraying direction of the grout and effectively solve the problem of blockage of a grout outlet;
2. when thick liquid is spout fast, utilize the second air inlet hose to gas injection in the inlet tube to form the negative pressure in the adsorption tube, can adsorb soil on back slip casting device's lateral wall, improve the cohesive force of back slip casting device and soil and this back slip casting device's bearing capacity.
Drawings
FIG. 1 is a schematic structural view of an embodiment;
FIG. 2 is a schematic structural diagram of a reinforcement cage framework in a precast pile body;
FIG. 3 is a schematic view of the internal structure of a grouting pipe for embodying an embodiment;
FIG. 4 is an exploded view of a slip pipe and a pipe core used in an embodiment;
fig. 5 is a schematic structural view for embodying the air inlet pipe, the air outlet pipe, and the adsorption pipe.
In the figure: 1. prefabricating a pile body; 11. an adsorption tube; 12. an air inlet pipe; 13. an air outlet pipe; 14. an opening; 2. a reinforcement cage framework; 3. a pulp outlet pipe; 4. a grouting pipe; 5. a slurry outlet; 6. an acceleration component; 61. a die; 611. an air outlet; 62. an umbrella-shaped baffle; 621. an air inlet; 63. a pulp falling cavity; 7. iron wires; 8. a first air intake hose; 9. a second air intake hose; 10. an air pump; 15. and (4) grouting a hose.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The first embodiment is as follows:
a concrete precast pile post-grouting device comprises a cylindrical precast pile body 1 and a reinforcement cage framework 2 preset in the precast pile body 1, wherein the reinforcement cage framework 2 surrounds the inner wall of the precast pile body 1, as shown in figures 1 and 2; be equipped with a plurality of slip casting pipes 4 and a plurality of play thick liquid pipe 3 in the precast pile body 1, slip casting pipe 4 bindes on steel reinforcement cage skeleton 2 through iron wire 7, play thick liquid pipe 3 welding is on the lateral wall of slip casting pipe 4, be equipped with the play thick liquid hole 5 that is linked together with play thick liquid pipe 3 on the pipe wall of slip casting pipe 4, be equipped with the subassembly 6 with higher speed that is used for accelerating out thick liquid hole 5 whitewashing in the slip casting pipe 4, subassembly 6 provides great air current with higher speed, can guide the thick liquid and discharge from play thick liquid pipe 3 fast, still can prevent to take place to block up in play thick liquid hole 5 department.
As shown in fig. 3, the accelerating assembly 6 comprises a pipe core 61 screwed in the grouting pipe 4 and an umbrella-shaped baffle 62 arranged at the top end of the pipe core 61, the pipe core 61 is thin and hollow, a slurry dropping cavity 63 is formed between the inner wall of the grouting pipe 4 and the outer wall of the pipe core 61, the circumferential wall of the umbrella-shaped baffle 62 extends to the upper part of the slurry dropping cavity 63, and slurry flows into the slurry dropping cavity 63 through the guiding of the umbrella-shaped baffle 62; an air inlet hole 621 is arranged at the top end of the umbrella-shaped baffle 62; as shown in fig. 4, the sidewall of the tube core 61 is provided with an air outlet 611, the height of the air outlet 611 at the bottom of the inner wall of the tube core 61 is higher than the height of the air outlet at the bottom of the outer wall of the tube core 61, air is injected into the air inlet 621, the air flow is blown out along the direction of the air outlet 611, and the flowing slurry is driven to be discharged from the slurry outlet 5.
As shown in fig. 4, the diameter of the slurry outlet pipe 3 is larger than the diameter of the slurry outlet hole 5, so as to wrap the slurry outlet hole 5 in the circumferential direction, and since the airflow in the pipe core 61 is large, the slurry sprayed out from the slurry outlet hole 5 is diffused in the circumferential direction, and the slurry outlet pipe 3 wraps the slurry outlet hole 5 in the circumferential direction, thereby being beneficial to improving the stability of the slurry outlet process.
As shown in fig. 5, an adsorption tube 11 is disposed on a side wall of the precast pile body 1 (fig. 1), an air inlet tube 12 and an air outlet tube 13 communicated with the air inlet tube 12 are disposed in the precast pile body 1, a joint between the air inlet tube 12 and the air outlet tube 13 is a corner, an opening 14 is disposed at the corner, a diameter of the opening 14 is smaller than a tube diameter of the adsorption tube 11, the tube diameters of the air inlet tube 12 and the air outlet tube 13 are both larger than the tube diameter of the adsorption tube 11, another end of the air inlet tube 12 extends to a top end of the precast pile body 1 and is connected with a second air inlet hose 9, another end of the air outlet tube 13 extends to a bottom end of the precast pile body 1, air is injected into the air inlet tube 12 through the second air inlet hose 9, air is rapidly discharged from the air outlet tube 13, negative pressure is generated in the adsorption tube 11 at the moment of air flow discharge, the adsorption tube 11 extends to the outside of the precast, the method is beneficial to improving the bonding force between the precast pile body 1 and the soil and the bearing capacity of the precast pile body 1.
The working principle is as follows: starting a grouting machine (not shown in the figure) and the air pump 10, grouting the grouting machine into the grouting pipe 4, and enabling the grout to fall into the grout falling cavity 63 under the guiding action of the umbrella-shaped baffle plate 62; the air pump 10 supplies air to the first air inlet hose 8 and the second air inlet hose 9, air flow in the first air inlet hose 8 passes through the air outlet 611 and drives slurry to be sprayed out of the slurry outlet 5 together, and therefore the blocking condition in the slurry outlet 5 is reduced; the air current in the second air inlet hose 9 gets into intake pipe 12 to discharge via outlet duct 13, because the pipe diameter of adsorption tube 11 is thin, in the air current exhaust's twinkling of an eye, can produce the negative pressure in the adsorption tube 11, can adsorb the soil outside the precast pile body 1 on precast pile body 1 lateral wall fast, and then improve the adhesion between soil and precast pile body 1.
Example two:
a forming method of a concrete precast pile post-grouting device comprises the following steps:
(1) screwing the tube core 61 into the grouting tube 4;
(2) placing a reinforcement cage framework 2 in a mold, binding a grouting pipe 4 on the reinforcement cage framework 2 through an iron wire 7, and welding a grout outlet pipe 3 on the grouting pipe 4;
(3) binding the adsorption tube 11, the air inlet tube 12 and the air outlet tube 13 on the grouting tube 4 through the iron wires 7, so that the opening 14 is connected with the corners of the air inlet tube 12 and the air outlet tube 13, and welding the connection parts of the adsorption tube 11, the air inlet tube 12 and the air outlet tube 13;
(4) and pouring concrete into the mould to form the post-grouting device.
Example three:
a grouting process of a post-grouting device for a concrete precast pile comprises the following steps:
(1) drilling;
(2) connecting a grouting hose 15 to the grouting pipe 4, and respectively connecting a first air inlet hose 8 and a second air inlet hose 9 to an air inlet hole 621 and an air inlet pipe 12;
(3) sinking the post-grouting device into the hole;
(4) the grouting machine and the air pump 10 are started.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.
Claims (8)
1. The utility model provides a slip casting device behind concrete precast pile, includes precast pile body (1) and presets steel reinforcement cage skeleton (2) in it, its characterized in that: a slurry outlet pipe (3) and a plurality of grouting pipes (4) are arranged in the precast pile body (1), slurry outlet holes (5) communicated with the slurry outlet pipe (3) are formed in the pipe walls of the grouting pipes (4), and an accelerating assembly (6) for accelerating the slurry spraying of the slurry outlet holes (5) is arranged in each grouting pipe (4); accelerating component (6) including setting up hollow tube core (61), umbrella-type baffle (62), the inlet port (621) of setting on umbrella-type baffle (62) top in slip casting pipe (4), inlet port (621) are connected with first air inlet hose (8) and air pump (10), be equipped with venthole (611) on the outer wall of tube core (61), venthole (611) set up with grout outlet (5) relatively, form between slip casting pipe (4) inner wall and tube core (61) outer wall and fall pulp chamber (63), umbrella-type baffle (62) extend to and fall pulp chamber (63) top.
2. The concrete precast pile post-grouting device according to claim 1, characterized in that: the pipe diameter of the grout outlet pipe (3) is larger than the aperture of the grout outlet hole (5), the grouting pipe (4) is bound on the reinforcement cage framework (2) through an iron wire (7), and the grout outlet pipe (3) is welded on the grouting pipe (4).
3. The concrete precast pile post-grouting device according to claim 2, characterized in that: be equipped with adsorption tube (11) on the lateral wall of precast pile body (1), be equipped with intake pipe (12) in precast pile body (1) and outlet duct (13) that are linked together with intake pipe (12), intake pipe (12) all are greater than the pipe diameter of adsorption tube (11) with the pipe diameter of outlet duct (13), intake pipe (12) are equipped with opening (14) that are linked together with adsorption tube (11) with the junction of outlet duct (13), opening (14) diameter is less than the pipe diameter of adsorption tube (11), intake pipe (12) are the turning with the junction of outlet duct (13), the other end of intake pipe (12) extends to the top of precast pile body (1) and is connected with second air inlet hose (9), the other end of outlet duct (13) extends to the bottom of precast pile body (1).
4. The concrete precast pile post-grouting device according to claim 1, characterized in that: the height of the hole bottom of the air outlet hole (611) on the inner wall of the tube core (61) is higher than that of the hole bottom on the outer wall of the tube core (61).
5. The method for forming a post-grouting device for a precast concrete pile as claimed in claim 4, comprising the steps of:
(1) installing a tube core (61) in the grouting tube (4);
(2) placing a reinforcement cage framework (2) in a mold, binding a grouting pipe (4) on the reinforcement cage framework (2) through an iron wire (7), and welding a grout outlet pipe (3) on the grouting pipe (4);
(3) binding the adsorption tube (11), the air inlet tube (12) and the air outlet tube (13) on the grouting tube (4) through iron wires (7), so that the opening (14) is connected with the corners of the air inlet tube (12) and the air outlet tube (13), and welding the connection parts of the adsorption tube (11), the air inlet tube (12) and the air outlet tube (13);
(4) and pouring concrete into the mould to form the post-grouting device.
6. The method for forming a post-grouting device for a precast concrete pile as claimed in claim 5, wherein: in the step (1), the top height of the tube core (61) is lower than the height of the opening of the grouting tube (4), and the tube core (61) is in threaded connection with the inside of the grouting tube (4).
7. The method for forming a post-grouting device for a precast concrete pile as claimed in claim 5, wherein: the adsorption tube (11), the air inlet tube (12) and the air outlet tube (13) are welded with each other.
8. The grouting process of a concrete precast pile post-grouting device as claimed in claim 5, characterized by comprising the steps of:
(1) drilling;
(2) connecting a grouting hose (15) to the grouting pipe (4), and respectively connecting a first air inlet hose (8) and a second air inlet hose (9) to an air inlet hole (621) and an air inlet pipe (12);
(3) sinking the post-grouting device into the hole;
(4) and starting the grouting machine and the air pump (10).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810850199.5A CN108894232B (en) | 2018-07-28 | 2018-07-28 | Post-grouting device for concrete precast pile and forming method and grouting process thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810850199.5A CN108894232B (en) | 2018-07-28 | 2018-07-28 | Post-grouting device for concrete precast pile and forming method and grouting process thereof |
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| Publication Number | Publication Date |
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| CN108894232A CN108894232A (en) | 2018-11-27 |
| CN108894232B true CN108894232B (en) | 2020-09-04 |
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Families Citing this family (2)
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| CN111254965A (en) * | 2020-02-10 | 2020-06-09 | 深圳中海建筑有限公司 | Grouting type recycled concrete prefabricated pier foundation and manufacturing method thereof |
| CN113910440B (en) * | 2021-11-10 | 2022-10-04 | 日照市公路事业发展中心 | Concrete diversion and solidification device for highway bridge precast pile and implementation method thereof |
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| CN206396742U (en) * | 2017-01-06 | 2017-08-11 | 福建金固建材有限公司 | A kind of prefabricated pile |
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| CN1817481A (en) * | 2006-03-23 | 2006-08-16 | 上海交通大学 | Low-pressure pneumatic slurry casting machine |
| CN201068653Y (en) * | 2007-07-13 | 2008-06-04 | 中铁十二局集团有限公司 | Adjustable heavy pressure grouting device |
| CN201865353U (en) * | 2010-03-24 | 2011-06-15 | 李明芳 | Grouting device |
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| CN108894232A (en) | 2018-11-27 |
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