CN214573975U

CN214573975U - Grouting head for cast-in-place pile MPJ construction method

Info

Publication number: CN214573975U
Application number: CN202120167630.3U
Authority: CN
Inventors: 李继承; 王星; 魏倩; 伍勇军; 赵金明; 陈灿奇; 王帅
Original assignee: China Construction Third Bureau Construction Engineering Co Ltd
Current assignee: China Construction Third Engineering Bureau Co Ltd; China Construction Third Bureau Group Co Ltd
Priority date: 2021-01-21
Filing date: 2021-01-21
Publication date: 2021-11-02
Anticipated expiration: 2031-01-21

Abstract

The utility model relates to a grouting head for a cast-in-place pile MPJ construction method, which comprises a grouting pipe, a claw bolt arranged outside the grouting pipe, a distributor arranged at the bottom of the grouting pipe and a spray head connected with the distributor; the top of the grouting pipe is used for being connected with a pumping high-pressure hose; the claw bolt is positioned at the lower part of the grouting pipe, and plays a role in adjusting the grouting speed by adjusting the tightness degree of the claw bolt; the upper part of the distributor is connected with the bottom of the grouting pipe, the lower part of the distributor is provided with a plurality of openings along the circumferential direction, each opening is connected with a spray head, and slurry injected from the grouting pipe is distributed into the spray heads through the distributor. The utility model discloses to bored concrete pile MPJ worker method design a special slip casting head, its simple structure, easy manufacturing, easily aggregate erection can guarantee slip casting direction and velocity of flow, reduces the impact of slip casting body to the pile bottom and pile wall, reduces the sediment and generates, has stronger practical value, and economic benefits and social are showing.

Description

Grouting head for cast-in-place pile MPJ construction method

Technical Field

The utility model relates to a bored concrete pile construction technical field, concretely relates to a special slip casting head for bored concrete pile MPJ worker method.

Background

At present, the action point of a treating agent in an MPJ construction method (see Chinese patent CN111851475A, an MPJ construction method for cast-in-place pile construction) of a cast-in-place pile is at the bottom of a drilled hole, the depth of the hole of a conventional engineering pile is more than 30 meters, the pressure under the hole is large, the buoyancy of a guide pipe is larger when the guide pipe goes downwards, the hole is filled with reinforcing steel bars, and the guide pipe is easy to damage and hang and pull. The treating agent has certain flow velocity when being injected into the bottom of the pile foundation, the direction and the flow velocity of the injected slurry are not easy to control, and certain impact is easily formed on the pile bottom and the pile wall, so that soil is caused to fall off, and therefore, a special grouting head for an MPJ construction method of the cast-in-place pile needs to be researched and designed.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the utility model is to provide a grouting head for a bored concrete pile MPJ construction method aiming at the defects of the prior art, which is time-saving and labor-saving, reduces the working difficulty, improves the adaptability and improves the working efficiency; and the operation is simple, and the grouting direction and the flow velocity can be ensured.

The utility model discloses a solve the technical scheme that technical problem that the aforesaid provided adopted and be:

a grouting head for an MPJ construction method of a cast-in-place pile comprises a grouting pipe, a claw bolt arranged outside the grouting pipe, a distributor arranged at the bottom of the grouting pipe and a spray head connected with the distributor; the top of the grouting pipe is used for being connected with a pumping high-pressure hose; the claw bolt is positioned at the lower part of the grouting pipe, and plays a role in adjusting the grouting speed by adjusting the tightness degree of the claw bolt; the upper part of the distributor is connected with the bottom of the grouting pipe, the lower part of the distributor is provided with a plurality of openings along the circumferential direction, each opening is connected with a spray head, and slurry injected from the grouting pipe is distributed into the spray heads through the distributor.

In the above scheme, the nozzle support is further included and comprises a sleeve, and the sleeve is sleeved on the lower portion of the grouting pipe and is fastened and connected through the claw bolt.

In the above scheme, the nozzle support further comprises an upper ring and a lower ring, the upper ring is connected with the sleeve through a plurality of inclined steel bars distributed along the circumferential direction, the lower ring is arranged in parallel with the upper ring, and the upper ring and the lower ring are connected through a plurality of vertical steel bars distributed along the circumferential direction; the distributor and the spray head are positioned in the spray head bracket.

In the above scheme, the grouting pipe is a steel pipe made of rigid materials, the length of the grouting pipe is at least 1 m, and the upper part and the lower part of the grouting pipe are both provided with threads for connection.

In the above scheme, the claw bolt is along the circumference of slip casting pipe evenly sets up a plurality of, and the lower part sets up a plurality of connecting holes along circumference equipartition in the slip casting pipe for the connection of claw bolt.

In the above scheme, the shower nozzle is the L type steel pipe of making by rigid material, sets up a plurality ofly according to specific demand, and along circumference evenly distributed.

The beneficial effects of the utility model reside in that:

the utility model discloses to bored concrete pile MPJ worker method design a special slip casting head, its simple structure, easy manufacturing, easily aggregate erection can guarantee slip casting direction and velocity of flow, reduces the impact of slip casting body to the pile bottom and pile wall, reduces the sediment and generates, has stronger practical value, and economic benefits and social are showing.

Drawings

The invention will be further explained with reference to the drawings and examples, wherein:

FIG. 1 is a front view of a first embodiment of a grouting head of the invention;

FIG. 2 is a top plan view of a first embodiment of the grouting head of the invention;

FIG. 3 is a top view of a second embodiment of the grouting head of the invention;

FIG. 4 is a top view of a third embodiment of a grouting head according to the invention;

in the figure: 10. a grouting pipe; 20. a claw bolt; 30. a dispenser; 40. a spray head; 50. a spray head holder; 51. a sleeve; 52. an upper ring; 53. a lower ring; 54. inclining the steel bar; 55. and (4) a vertical steel bar.

Detailed Description

In order to clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

As shown in fig. 1-2, a grouting head for a bored concrete pile MPJ construction method according to a first embodiment of the present invention includes a grouting pipe 10, a ram's horn bolt 20 disposed outside the grouting pipe 10, a distributor 30 disposed at the bottom of the grouting pipe 10, a nozzle 40 connected to the distributor 30, and a nozzle holder 50 fitted outside the grouting pipe 10.

The slip casting pipe 10 is a steel pipe made of rigid material, the length of the slip casting pipe is at least 1 m, the top and the bottom of the slip casting pipe are both provided with threads for connection, and the middle lower part of the slip casting pipe 10 is provided with 4 connecting holes for connection of the claw bolts 20.

The 20 numbers of goat's horn bolts are 4 for the connection of slip casting pipe 10 and shower nozzle support 50 plays the effect of fixed shower nozzle support 50, simultaneously, through the elasticity of adjusting goat's horn bolt 20, plays the effect of adjusting slip casting speed size.

The distributor 30 is made of rigid material, the upper part of the distributor is connected with the bottom of the grouting pipe 10, a plurality of openings are arranged around the lower part of the distributor and connected with the spray head 40, and the slurry injected by the grouting pipe 10 is distributed into the spray head 40 through the distributor 30, so that the slurry injection speed is reduced, and the impact on the pile bottom and the pile wall when the slurry is injected is reduced.

The nozzles 40 are L-shaped steel pipes made of rigid material, and are connected to the lower opening of the distributor 30, and the number of the nozzles 40 can be set according to specific requirements. In this embodiment, the number of the spray heads 40 is 3, and the spray heads are uniformly distributed along the circumferential direction of the distributor 30.

The nozzle bracket 50 comprises a sleeve 51, an upper circular ring 52 and a lower circular ring 53, the diameter of the sleeve 51 is slightly larger than that of the grouting pipe 10, and the sleeve 51 is sleeved on the lower part of the grouting pipe 10 and is fastened and connected through a claw bolt 20. The upper ring 52 is connected with the sleeve 51 through 4 inclined steel bars 54 distributed along the circumferential direction, the lower ring 53 is arranged in parallel with the upper ring 52, and the upper ring and the lower ring are connected through 4 vertical steel bars 55 distributed along the circumferential direction. The distributor 30 and the spray head 40 are located in the spray head support 50, the spray head support 50 is used for fixing the whole grouting head device during grouting, the direction of the spray head 40 is guaranteed to be downward all the time, the slurry inflow direction is guaranteed to be downward all the time, and impact on a pile wall and a pile bottom during slurry injection is reduced.

The utility model discloses during the use, at first accomplish each partial equipment subaerial, be connected slip casting pipe 10 top with pump sending high pressure hose again, treat the device equipment and accomplish the back, test subaerial earlier, through the elasticity of adjusting goat's horn bolt 20, debug to suitable slip casting speed. And after the second cast-in-place pile is cleaned, completing the adjustment of the grouting speed on the ground before the concrete is cast, then lowering the grouting head to the bottom of the cast-in-place pile from the concrete guide pipe, and adjusting the grouting head to keep a vertical state, thus starting the grouting process.

As shown in fig. 3, in order to provide a second embodiment of the grouting head for the MPJ method of cast-in-place pile according to the present invention, the present embodiment is different from the first embodiment in that the number of the nozzles 40 is 4 and the nozzles are uniformly distributed along the circumferential direction of the distributor 30.

As shown in fig. 4, in order to provide a second embodiment of the grouting head for the MPJ method of cast-in-place pile of the present invention, the present embodiment is different from the first embodiment in that the number of the nozzles 40 is 5 and the nozzles are uniformly distributed along the circumferential direction of the distributor 30.

While the embodiments of the present invention have been described with reference to the accompanying drawings, the present invention is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many modifications may be made by one skilled in the art without departing from the spirit and scope of the present invention as defined in the appended claims.

Claims

1. The grouting head for the cast-in-place pile MPJ construction method is characterized by comprising a grouting pipe (10), a claw bolt (20) arranged outside the grouting pipe (10), a distributor (30) arranged at the bottom of the grouting pipe (10) and a spray head (40) connected with the distributor (30); the top of the grouting pipe (10) is used for being connected with a pumping high-pressure hose; the claw bolt (20) is positioned at the middle lower part of the grouting pipe (10), and the tightness degree of the claw bolt (20) is adjusted to play a role in adjusting the grouting speed; the upper portion of the distributor (30) is connected with the bottom of the grouting pipe (10), a plurality of openings are formed in the lower portion of the distributor (30) along the circumferential direction, each opening is connected with a spray head (40), and slurry injected from the grouting pipe (10) is distributed into the spray heads (40) through the distributor (30).

2. The grouting head for an MPJ construction method of a cast-in-place pile as claimed in claim 1, further comprising a nozzle support (50), wherein the nozzle support (50) comprises a sleeve (51), and the sleeve (51) is sleeved on the lower part of the grouting pipe (10) and is fastened and connected by the claw bolt (20).

3. The grouting head for an MPJ construction method of cast-in-place piles as claimed in claim 2, wherein the nozzle supporter (50) further comprises an upper ring (52) and a lower ring (53), the upper ring (52) is connected with the sleeve (51) through a plurality of inclined steel bars (54) distributed along the circumferential direction, the lower ring (53) is arranged in parallel with the upper ring (52) and is connected with the upper ring (52) through a plurality of vertical steel bars (55) distributed along the circumferential direction; the distributor (30) and the spray head (40) are positioned in the spray head bracket (50).

4. The grouting head for an MPJ construction method of a cast-in-place pile according to claim 1, wherein the grouting pipe (10) is a steel pipe made of a rigid material, has a length of at least 1 m, and is provided with threads for connection at upper and lower portions thereof.

5. The grouting head for the MPJ construction method of the cast-in-place pile as claimed in claim 1, wherein a plurality of the claw bolts (20) are uniformly arranged along the circumferential direction of the grouting pipe (10), and a plurality of connecting holes are uniformly arranged along the circumferential direction of the middle lower part of the grouting pipe (10) for connecting the claw bolts (20).

6. The grouting head for an MPJ construction method of cast-in-place piles as claimed in claim 1, wherein the nozzles (40) are L-shaped steel pipes made of rigid material, and are provided in number according to specific requirements and uniformly distributed along the circumferential direction.