CN216664105U - Cement mixing pile drill rod - Google Patents
Cement mixing pile drill rod Download PDFInfo
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- CN216664105U CN216664105U CN202123441313.5U CN202123441313U CN216664105U CN 216664105 U CN216664105 U CN 216664105U CN 202123441313 U CN202123441313 U CN 202123441313U CN 216664105 U CN216664105 U CN 216664105U
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- drill rod
- mixing pile
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- cement mixing
- stirring
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Abstract
The utility model discloses a drill rod of a cement soil mixing pile, which comprises a drill rod, a drill bit, a slurry inlet hole, an air inlet hole, a mixing blade and a slurry outlet hole, wherein the drill bit is connected and installed at the bottom of the drill rod, the mixing blade is connected and installed on the outer wall of the drill rod, the slurry inlet hole and the air inlet hole are arranged and installed in the drill rod, and the slurry outlet hole is arranged and installed at the bottom of the drill rod and positioned above the drill bit. Stirring vane is the multilayer setting, is fixed interval between every layer of stirring vane, and every layer of stirring vane's quantity is 2, and 2 stirring vane are "1" style of calligraphy symmetric distribution in the both sides of drilling rod. The direction of two adjacent layers of stirring blades forms an included angle of 90 degrees to form crisscross distribution. The drill rod for the cement-soil mixing pile has high construction efficiency, can increase the effective treatment depth of the foundation, has small disturbance to soil mass around the pile, is convenient for popularization of equipment, saves cement consumption and has low engineering cost, thereby being an economic, efficient, high-quality and environment-friendly soft soil foundation treatment device initiated in China.
Description
Technical Field
The utility model relates to the technical field of building construction, in particular to a drill rod of a cement-soil mixing pile.
Background
A cement-soil mixing pile is used to reinforce the saturated soft clay foundation, and features that cement is used as solidifying agent, the deep soft soil and solidifying agent are forcibly mixed by special mixing machine, and the solidified agent and soft soil are chemically and physically reacted to form a high-quality foundation with integrity, water stability and strength. The reinforcement depth is usually over 5m, the dry reinforcement depth is not over 15m, and the wet reinforcement depth is not over 20 m. The cement paste pressed into the soft soil is forcibly mixed with the surrounding soft soil by a rotary stirring blade to form the mud reinforcing body.
The conventional cement mixing pile at present has certain technical limitations, such as: the stirring blades can not prevent the strength of the pile body from meeting the design requirement caused by the overflow of cement paste, the strength of a consolidation body is not uniformly distributed along the vertical direction caused by the nonuniform stirring of soil body and the cement paste, in addition, the construction efficiency is low, the cement doping amount is difficult to control, the treatment depth is shallow, the length of a powder spraying pile is not more than 15m, the wet reinforcement depth is not more than 20m, and the application range of cement-soil stirring is also inhibited.
Therefore, how to design a cement mixing pile drill rod solves the problem of uneven mixing of soil and cement paste, effectively improves the construction efficiency, increases the effective treatment depth of the foundation and has very important significance.
Disclosure of Invention
In order to solve the technical problems, the utility model provides the drill rod for the cement-soil mixing pile, which effectively solves the problem of uneven mixing of soil and cement paste and effectively improves the construction efficiency.
The drill rod of the cement-soil mixing pile comprises a drill rod, a drill bit, a slurry inlet hole, an air inlet hole, a mixing blade and a slurry outlet hole, wherein the drill bit is connected and installed at the bottom of the drill rod, the mixing blade is connected and installed on the outer wall of the drill rod, the slurry inlet hole and the air inlet hole are arranged and installed inside the drill rod, and the slurry outlet hole is arranged and installed at the bottom of the drill rod and located above the drill bit.
Further, the stirring blades are arranged in a plurality of layers, and a fixed distance is reserved between every two layers of stirring blades.
Preferably, the number of each layer of stirring blades is 2, and 2 stirring blades are symmetrically distributed on two sides of the drill rod in a 1 shape.
Preferably, the directions of two adjacent layers of stirring blades form an included angle of 90 degrees, and the two adjacent layers of stirring blades are distributed in a crisscross manner.
Furthermore, the stirring blade is connected to the drill rod through welding, and the welding inclination angle between the stirring blade and the drill rod is 10 degrees.
Further, the short side direction of the stirring blade is designed to be radian.
Preferably, the short side direction radian of the stirring blade is 0.73 rad.
Furthermore, the material of stirring vane is high strength manganese steel material.
Furthermore, the number of the grout outlet holes is 4, and the grout outlet holes are uniformly distributed on the outer side of the drill rod.
Furthermore, the rotary cutting pick is further included and is connected and installed on the drill bit.
The working principle of the utility model is as follows:
(1) the short edge direction of the stirring blade is provided with a radian, and the stirring blade and the drill rod form a certain welding inclination angle, so that the blade is not only used for simple horizontal cutting but also used for multi-directional cutting during stirring, and the beating and smashing of the blades on a soil body and the stirring effect on cement soil can be effectively guaranteed.
(2) The number of the grout outlets is 4, the grout outlets are uniformly distributed on the outer side of the drill rod, multi-direction and multi-path grout spraying is facilitated, soil bodies and cement grout can be continuously and uninterruptedly deeply mixed and uniformly stirred in the process of sinking and lifting the drill rod, and therefore the pile body strength and the pile forming quality are guaranteed.
(3) The stirring blade of high-strength manganese steel material is characterized by that under the condition of strong impact and extrusion the surface layer can be quickly hardened, so that it can retain good toughness and plasticity in its interior, at the same time the hardened layer has good wear-resisting property, and has the advantages of high strength and wear resistance.
The substantive characteristics and the progress of the utility model are as follows:
the cement-soil mixing pile drill rod has the advantages of uniform cement-soil mixing, realization of 'two-stirring and one-spraying', high construction efficiency, capability of increasing the effective treatment depth of the foundation, small disturbance to soil around the pile, convenience in popularization of equipment, cement consumption saving and low engineering cost, and is an economic, efficient, high-quality and environment-friendly soft soil foundation treatment device initiated in China.
Drawings
Fig. 1 is a schematic front view of the present invention.
FIG. 2 is a schematic view of a single-layer stirring blade structure.
Fig. 3 is a schematic axial section of a drill rod.
FIG. 4 is a schematic view of the axial interface of the drill bit.
Part numbers and names in the figures:
the drilling rod 1, the stirring blade 2, the slurry outlet hole 3, the drill bit 4, the slurry inlet hole 5, the air inlet hole 6 and the rotary cutting pick 7.
Detailed Description
The present invention will be described in further detail with reference to the drawings and embodiments. It is to be understood that the specific embodiments described herein are for purposes of illustration only and are not to be construed as limitations of the utility model. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.
In addition, the embodiments of the present invention and the features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
As shown in fig. 1-4, the utility model provides a drill rod for a cement-soil mixing pile, which comprises a drill rod 1, a drill bit 4, a slurry inlet hole 5, an air inlet hole 6, a mixing blade 2 and a slurry outlet hole 2, wherein the drill bit 4 is connected and installed at the bottom of the drill rod 1, the mixing blade 2 is connected and installed at the outer wall of the drill rod 1, the slurry inlet hole 5 and the air inlet hole 6 are arranged and installed inside the drill rod 1, and the slurry outlet hole 2 is arranged and installed at the bottom of the drill rod 1 and located above the drill bit 4.
The stirring blades 2 are arranged in a multilayer mode, and a fixed distance is reserved between every two layers of the stirring blades 2.
The number of each layer of stirring blades 2 is 2, and the 2 stirring blades 2 are symmetrically distributed on two sides of the drill rod 1 in a 1-shaped manner.
The directions of two adjacent layers of stirring blades 2 form an included angle of 90 degrees, and the two adjacent layers of stirring blades are distributed in a cross shape.
The design of multilayer stirring vane 2, adjacent two-layer stirring vane 2 forms the crisscross type and distributes, can stir more fully, effectively strengthens stirring effect.
Further, the stirring blade 2 is connected to the drill rod 1 through welding, and the welding inclination angle between the stirring blade 2 and the drill rod 1 is 10 degrees.
The short side direction of the stirring blade 2 is designed to be radian.
The radian of the short side direction of the stirring blade 2 is 0.73 rad.
The short side direction of the stirring blade 2 has a certain radian, and the welding of the stirring blade 2 also has a certain welding inclination angle, so that the stirring blade 2 not only performs simple horizontal cutting but also performs multidirectional cutting during stirring, and the beating and smashing of the blades on the soil body and the stirring effect on the cement soil can be effectively guaranteed.
Furthermore, the material of the stirring blade 2 is high-strength manganese steel.
The stirring blade 2 made of the high-strength manganese steel material is characterized in that under the conditions of strong impact and extrusion, the surface layer is rapidly processed and hardened, so that the hardened layer has good wear resistance while good toughness and plasticity are kept in the stirring blade, and the stirring blade has the advantages of high strength and wear resistance.
Furthermore, the number of the grout outlet holes 2 is 4, and the grout outlet holes are uniformly distributed on the outer side of the drill rod 1.
The number of the grout outlets is 4, the grout outlets are uniformly distributed on the outer side of the drill rod 1, multi-direction and multi-path grout spraying is facilitated, soil bodies and grout can be continuously and uninterruptedly deeply mixed and uniformly stirred in the sinking and lifting processes of the drill rod 1, and therefore the pile body strength and the pile forming quality are guaranteed.
Furthermore, the device also comprises a rotary cutting pick 7, and the rotary cutting pick 7 is connected and installed on the drill bit 4.
The rotary excavating cutting teeth 7 are connected and installed, so that the drilling of the drill bit 4 is effectively enhanced, and the construction efficiency is improved.
Example 1
The length of the drill rod 1 is 6000mm, the distance between the upper layer of stirring blade 2 and the lower layer of stirring blade 2 is 700mm, the length of the single stirring blade 2 is 400mm, the width of the single stirring blade 2 is 150mm, the thickness of the single stirring blade 2 is 20mm, the radian of the single stirring blade 2 is 0.73rad, the welding inclination angle between the stirring blade 2 and the drill rod 1 is 10 degrees, and the diameter of the drill bit 4 is 1000 mm.
The working principle and the process of the utility model are as follows:
before construction, high-pressure pump equipment is checked and debugged, and the pressure and the discharge capacity of the equipment must meet the design requirements. The sealing rings of all parts are good, sundries cannot be left in all channels and nozzles, a high-pressure water jetting test and a guniting test are carried out, and grout can be jetted after the sealing rings are qualified.
Spraying, stirring and sinking: the mixer cuts soil downwards along the guide frame, a slurry feeding pump is started at a position 25cm below the ground surface to spray cement slurry to the soil body, the multiple groups of stirring blades 2 rotate to cut and stir the soil body simultaneously, the mixer sinks continuously, and the sinking speed of the drill rod 1 is 0.6-0.8 m/min. When the construction machine sinks, the guniting speed is controlled through the speed regulating motor, the uniformity of the section grout amount is ensured, the current change of the construction machine is combined in the period to determine whether the soft soil layer is penetrated, when the current changes suddenly, the general current reaches 60-70A, and the construction machine can be considered to enter a relatively hard layer. And (5) drilling to the designed depth, and lifting the drill after the pile tip is continuously sprayed and stirred for 30 seconds on the spot. All technological parameters of the guniting operation system need to be controlled according to preset requirements, and well records of drilling guniting time, grout consumption, cement consumption, grout bleeding condition, pressure and the like are made.
Stopping stirring and lifting: and (3) closing the slurry feeding pump, lifting the stirrer, rotating and stirring the cement soil by the multilayer stirring blades 2 at the same time, wherein the lifting speed is 0.7-1.0 m/min until the elevation of the ground surface or the designed pile top is 50cm higher, completing single-pile construction, and filling the construction record.
The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that are not thought of through the inventive work should be included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope defined by the claims.
Claims (10)
1. The utility model provides a soil cement mixing pile drilling rod which characterized in that: including drilling rod (1), drill bit (4), advance thick liquid hole (5), inlet port (6), stirring vane (2), go out thick liquid hole (3), drill bit (4) connection is installed in the bottom of drilling rod (1), stirring vane (2) connection is installed in the outer wall of drilling rod (1), advance thick liquid hole (5), inlet port (6) and set up the inside of installing at drilling rod (1), go out thick liquid hole (3) and set up the bottom of installing at drilling rod (1), be located drill bit (4) top.
2. The soil cement mixing pile drill rod of claim 1, wherein: the stirring blades (2) are arranged in a multilayer mode, and a fixed distance is reserved between every two layers of the stirring blades (2).
3. The soil cement mixing pile drill rod of claim 2, wherein: the number of each layer of stirring blades (2) is 2, and the 2 stirring blades (2) are symmetrically distributed on two sides of the drill rod (1) in a 1-shaped manner.
4. The soil cement mixing pile drill rod of claim 3, wherein: the directions of two adjacent layers of stirring blades (2) form an included angle of 90 degrees to form crisscross distribution.
5. The soil cement mixing pile drill rod of claim 1, wherein: the stirring blade (2) is connected to the drill rod (1) through welding, and the welding inclination angle between the stirring blade (2) and the drill rod (1) is 10 degrees.
6. The soil cement mixing pile drill rod of claim 1, wherein: the short side direction of the stirring blade (2) is designed to be radian.
7. The soil cement mixing pile drill rod as claimed in claim 6, wherein: the radian of the short side direction of the stirring blade (2) is 0.73 rad.
8. The soil cement mixing pile drill rod of claim 1, wherein: the stirring blades (2) are made of high-strength manganese steel.
9. The soil cement mixing pile drill rod of claim 1, wherein: the number of the grout outlet holes (3) is 4, and the grout outlet holes are uniformly distributed on the outer side of the drill rod (1).
10. The soil cement mixing pile drill rod of claim 1, wherein: the rotary drilling machine further comprises a rotary drilling cutting pick (7), and the rotary drilling cutting pick (7) is connected and installed on the drill bit (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123441313.5U CN216664105U (en) | 2021-12-31 | 2021-12-31 | Cement mixing pile drill rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123441313.5U CN216664105U (en) | 2021-12-31 | 2021-12-31 | Cement mixing pile drill rod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216664105U true CN216664105U (en) | 2022-06-03 |
Family
ID=81760013
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123441313.5U Active CN216664105U (en) | 2021-12-31 | 2021-12-31 | Cement mixing pile drill rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216664105U (en) |
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2021
- 2021-12-31 CN CN202123441313.5U patent/CN216664105U/en active Active
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