CN215801581U

CN215801581U - Double-shaft double-spraying cement mixing pile

Info

Publication number: CN215801581U
Application number: CN202121799045.1U
Authority: CN
Inventors: 郝朝旭; 陈明星; 陆杰; 杨军
Original assignee: China Coal Geology Group Co Ltd
Current assignee: China Coal Geology Group Co Ltd
Priority date: 2021-08-03
Filing date: 2021-08-03
Publication date: 2022-02-11
Anticipated expiration: 2031-08-03

Abstract

The utility model discloses a double-shaft double-spraying cement mixing pile which comprises a power box and two groups of power mechanisms, wherein each group of power mechanisms comprises a power head, a connecting flange, a coupler, a drill rod and a cutter head; the cutter head is fixedly connected with the outer peripheral wall of the lower part of the drill rod; the interior of each power mechanism is also provided with a fluid channel, and the fluid channel extends from the interior of the connecting flange to the bottom of the drill rod; the peripheral wall of the bottom of the drill rod is also provided with an injection hole which is communicated with the fluid channel; the three-way pipe fitting comprises an input end connected with an external grouting machine and an air compressor, and a first output end and a second output end which are communicated with fluid channels in each group of power mechanisms. The double-shaft double-spraying cement mixing pile provided by the utility model realizes that the spraying amount is increased under the condition of not increasing the shaft, so that the pile is uniformly mixed, and further, the construction efficiency is improved.

Description

Double-shaft double-spraying cement mixing pile

Technical Field

The utility model belongs to the technical field of cement mixing piles, and particularly relates to a double-shaft double-spraying cement mixing pile.

Background

The cement mixing pile is an effective form of soft foundation treatment, and is characterized by that it uses cement as main agent of solidifying agent, and utilizes mixing pile machine to spray cement into soil body and fully mix them so as to make cement and soil produce a series of physical and chemical reactions, and make the soft soil be hardened and raise foundation strength. The cement mixing pile is divided into single-shaft, double-shaft and three-shaft mixing piles according to the construction method mainly used.

The space enclosing structure of the current construction industry project and the reinforcement of the soft soil foundation use more double-shaft stirring, the traditional double-shaft stirring is the traditional process of stirring single-shaft guniting by utilizing a double-shaft cutter head, and the guniting pipe is usually positioned between two drill rods and is sprayed downwards.

In the related technology, the single shaft has lower guniting amount, uneven pile-forming stirring and low construction efficiency.

SUMMERY OF THE UTILITY MODEL

Utility model purpose: in order to overcome the defects in the prior art, the utility model provides a double-shaft double-spraying cement mixing pile, and aims to solve the technical problem of how to increase the spraying amount under the condition of not increasing a shaft, so that the pile is uniformly mixed, and further the construction efficiency is improved.

The technical scheme is as follows: in order to achieve the purpose, the utility model adopts the technical scheme that:

a double-shaft double-spraying cement mixing pile comprises a power box connected with an external rack and two groups of power mechanisms which are parallel to each other, wherein each group of power mechanisms comprises a power head, a connecting flange, a coupler, a drill rod and at least three groups of cutter heads, the power head is positioned inside the power box, the power output end of the power head is connected with the first end of the connecting flange, the connecting flange is positioned below the power box, the second end of the connecting flange is connected with the first end of the coupler, and the second end of the coupler is connected with the drill rod; the cutter heads are fixedly connected with the outer peripheral wall of the lower part of the drill rod, and at least three groups of cutter heads are uniformly distributed at intervals along the axial direction of the drill rod; the interior of each power mechanism is also provided with a fluid channel, and the fluid channel extends from the interior of the connecting flange to the bottom of the drill rod; the peripheral wall of the bottom of the drill rod is also provided with at least two groups of injection holes, the injection holes are communicated with the fluid channel, the bottom of the drill rod is also provided with a drill bit, and the injection holes are positioned between the drill bit and the cutter head; the double-shaft double-spraying cement mixing pile further comprises a three-way pipe fitting, the three-way pipe fitting comprises an input end, a first output end and a second output end, the input end is connected with an external grouting machine and an air compressor, and the first output end and the second output end are respectively communicated with each group of fluid channels in the power mechanism.

Optionally, the first output end and the second output end are respectively communicated with the fluid channel in each power mechanism through a first pipeline and a second pipeline, and the first pipeline and the second pipeline are inserted into the fluid channel from the side wall of the connecting flange.

Optionally, the grouting machine comprises a double-cylinder pump grouting machine, and the power of the double-cylinder pump grouting machine is 11 kilowatts; the air compressor comprises a three-cube air compressor.

Optionally, the distance between the cutter head and the drill bit is 1.5-2 meters.

Optionally, each power mechanism corresponds to three cutter heads.

Optionally, each drill rod corresponds to four groups of the injection holes, and the four groups of the injection holes are uniformly distributed at intervals along the central axis of the drill rod.

Optionally, the power head includes a driving motor and a speed reducer, a power output end of the driving motor is connected with a power input end of the speed reducer, and a power output end of the speed reducer is connected with the connecting flange.

Has the advantages that: compared with the prior art, the double-shaft double-spraying cement mixing pile provided by the utility model has the advantages that firstly, the fluid channels are arranged in the two drill rods, and the spraying is carried out through the spraying holes, so that double-shaft double spraying is realized, namely, the spraying amount is increased under the condition of not increasing the shafts, and further the construction efficiency is improved; secondly, the input end of the tee pipe fitting is connected with a grouting machine and an air compressor at the same time, so that gas and slurry are fully fused, the stirring and cutting effects on the soil body are achieved, and the pile forming stirring is more uniform.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the principles of the utility model and not to limit the utility model. In the drawings:

fig. 1 is a main sectional view of a dual-shaft dual-injection cement mixing pile according to an exemplary embodiment of the present invention;

FIG. 2 is a partial view taken along the direction A-A in FIG. 1 of a dual-shaft dual-injection cement mixing pile according to an exemplary embodiment of the present invention;

in the figure: 1. a power box; 2. a power head; 3. a connecting flange; 4. a coupling; 5. a drill stem; 501. a drill bit; 6. a cutter head; 7. a first conduit; 8. a second conduit; 9. a tee pipe fitting; 901. an input end; 902. a first output terminal; 903. a second output terminal; 10. a fluid channel; 11. and ejecting the hole.

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.

In the description of the present invention, it is to be understood that the terms "central", "longitudinal", "lateral", "length", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Further, in the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

The utility model is further described with reference to the following figures and examples.

As shown in fig. 1, the double-shaft double-spraying cement mixing pile comprises a power box 1 connected with an external rack and two groups of power mechanisms which are parallel to each other, wherein each group of power mechanisms comprises a power head 2, a connecting flange 3, a coupler 4, a drill rod 5 and at least three groups of cutter heads 6, the power head 2 is positioned inside the power box 1, the power output end of the power head 2 is connected with the first end of the connecting flange 3, the connecting flange 3 is positioned below the power box 1, the second end of the connecting flange 3 is connected with the first end of the coupler 4, and the second end of the coupler 4 is connected with the drill rod 5; the cutter head 6 is fixedly connected with the outer peripheral wall of the lower part of the drill rod 5, and optionally, the connection mode of the cutter head 6 and the drill rod 5 comprises but is not limited to one of welding, riveting, bolt fixing and integral forming; at least three groups of cutter heads 6 are uniformly distributed at intervals along the axial direction of the drill rod 5; the inside of each power mechanism is also provided with a fluid channel 10, and the fluid channel 10 extends from the inside of the connecting flange 3 to the bottom of the drill rod 5; the peripheral wall of the bottom of the drill rod 5 is also provided with at least two groups of injection holes 11, the injection holes 11 are communicated with the fluid channel 10, the bottom of the drill rod 5 is also provided with a drill bit 501, and the injection holes 11 are positioned between the drill bit 501 and the cutter head 6; the double-shaft double-spraying cement mixing pile further comprises a three-way pipe fitting 9, the three-way pipe fitting 9 comprises an input end 901, a first output end 902 and a second output end 903, the input end 901 is connected with an external grouting machine and an air compressor, and the first output end 902 and the second output end 903 are respectively communicated with the fluid channels 10 in each power mechanism.

In this embodiment, optionally, the number of the cutter heads 6 can be flexibly adjusted according to specific working conditions, that is, soil quality, and the more the number of the cutter heads 6 is, the more uniform the soil body is stirred; alternatively, the number of the injection holes 11 is flexibly arranged, and the larger the number of the injection holes 11, the larger the injection amount.

In the embodiment, when the power head 2 is started, the connecting flange 3 and the coupling 4 transmit the power of the power head 2 to the drill rod 5, so that the drill rod 5 drives the cutter head 6 to rotate; meanwhile, firstly, a grouting machine and an air compressor are started, cement slurry enters from an input end 901 of a three-way pipe fitting 9 and is respectively conveyed into fluid channels 10 in two drill pipes 5 through a first output end 902 and a second output end 903, and the air compressor is continuously inflated to fully fuse gas and the cement slurry, so that the effects of stirring and cutting a soil body are achieved; then, the cement slurry is sprayed out from the spraying holes 11 at the lower parts of the two drill rods 5, so that double-shaft double spraying is realized, namely, the slurry spraying amount is increased under the condition of not increasing the shafts, and further, the construction efficiency is improved.

In this embodiment, the grouter is a device for feeding cement slurry to tee fitting 9, the air compressor is a device for compressing air, the air compressor is configured similarly to a water pump, and most air compressors are reciprocating pistons, rotating blades or rotating screws.

As an alternative embodiment, as shown in fig. 1, the first output end 902 and the second output end 903 are respectively communicated with the fluid channel 10 in each set of power mechanism through a first pipe 7 and a second pipe 8, and the first pipe 7 and the second pipe 8 are inserted into the fluid channel 10 from the side wall of the connecting flange 3.

In the present embodiment, the first duct 7 and the second duct 8 are made of stainless steel.

As an alternative embodiment, as shown in fig. 1, the grouter comprises a dual pump grouter, the dual pump grouter having a power of 11 kw; the air compressor comprises a three-cube air compressor.

In this embodiment, the three-cube air compressor means that the air compressor can generate three cubes of compressed air per minute when operating at rated power.

As an alternative, as shown in fig. 1, the distance between the cutter head 6 and the drill 501 is 1.5 m to 2 m.

As an alternative, as shown in fig. 1, each set of power mechanisms corresponds to three sets of cutter discs 6.

As an alternative, as shown in fig. 2, each drill rod 5 corresponds to four sets of injection holes 11, and the four sets of injection holes 11 are evenly spaced along the central axis of the drill rod 5.

As an optional implementation manner, the power head 2 includes a driving motor and a speed reducer, a power output end of the driving motor is connected with a power input end of the speed reducer, and a power output end of the speed reducer is connected with the connecting flange 3.

In summary, according to the double-shaft double-spraying cement mixing pile provided by the utility model, the fluid channel is arranged in the two drill rods, and the spraying is performed through the spraying hole, so that the single-shaft spraying and double-shaft mixing of the related art is changed into double-shaft spraying and double-shaft mixing, the double-shaft double spraying is realized, namely, the spraying amount is increased under the condition of not increasing the shaft, and the construction efficiency is further improved; and the input end of the tee pipe fitting is simultaneously connected with a grouting machine and an air compressor, so that gas and slurry are fully fused, the stirring and cutting effects on the soil body are achieved, and the pile-forming stirring is more uniform.

The above description is only of the preferred embodiments of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the utility model and these are intended to be within the scope of the utility model.

Claims

1. A double-shaft double-spraying cement mixing pile comprises a power box (1) connected with an external frame and two groups of power mechanisms which are parallel to each other, and is characterized in that,

each power mechanism comprises a power head (2), a connecting flange (3), a coupler (4), a drill rod (5) and at least three cutter heads (6), wherein the power head (2) is located inside the power box (1), the power output end of the power head (2) is connected with the first end of the connecting flange (3), the connecting flange (3) is located below the power box (1), the second end of the connecting flange (3) is connected with the first end of the coupler (4), and the second end of the coupler (4) is connected with the drill rod (5); the cutter heads (6) are fixedly connected with the outer peripheral wall of the lower part of the drill rod (5), and at least three groups of cutter heads (6) are uniformly distributed at intervals along the axial direction of the drill rod (5);

the interior of each power mechanism is also provided with a fluid channel (10), and the fluid channel (10) extends from the interior of the connecting flange (3) to the bottom of the drill rod (5); the peripheral wall of the bottom of the drill rod (5) is further provided with at least two groups of injection holes (11), the injection holes (11) are communicated with the fluid channel (10), the bottom of the drill rod (5) is further provided with a drill bit (501), and the injection holes (11) are located between the drill bit (501) and the cutter head (6);

the double-shaft double-spraying cement mixing pile further comprises a three-way pipe fitting (9), wherein the three-way pipe fitting (9) comprises an input end (901), a first output end (902) and a second output end (903), the input end (901) is connected with an external grouting machine and an air compressor, and the first output end (902) and the second output end (903) are respectively communicated with a fluid channel (10) in each power mechanism.

2. The double-shaft double-spraying cement mixing pile according to claim 1, wherein the first output end (902) and the second output end (903) are respectively communicated with the fluid channel (10) in each group of the power mechanisms through a first pipeline (7) and a second pipeline (8), and the first pipeline (7) and the second pipeline (8) are inserted into the fluid channel (10) from the side wall of the connecting flange (3).

3. The dual-shaft dual-jet cement mixing pile as recited in claim 1, wherein the grouter comprises a dual-cylinder pump grouter having a power of 11 kw;

the air compressor comprises a three-cube air compressor.

4. The double-shaft double-jet cement mixing pile as recited in claim 1, wherein the distance between the cutter head (6) and the drill bit (501) is 1.5-2 m.

5. The double-shaft double-spraying cement mixing pile as recited in claim 1, wherein each set of the power mechanisms corresponds to three sets of the cutter discs (6).

6. The double-shaft double-spraying cement mixing pile as recited in claim 1, wherein each drill rod (5) corresponds to four groups of the injection holes (11), and the four groups of the injection holes (11) are evenly distributed at intervals along the central axis of the drill rod (5).

7. The double-shaft double-spraying cement mixing pile according to any one of claims 1 to 6, wherein the power head (2) comprises a driving motor and a speed reducer, a power output end of the driving motor is connected with a power input end of the speed reducer, and a power output end of the speed reducer is connected with the connecting flange (3).