CN211230230U - Device for drilling formed foundation pile hole - Google Patents
Device for drilling formed foundation pile hole Download PDFInfo
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- CN211230230U CN211230230U CN201922119961.5U CN201922119961U CN211230230U CN 211230230 U CN211230230 U CN 211230230U CN 201922119961 U CN201922119961 U CN 201922119961U CN 211230230 U CN211230230 U CN 211230230U
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- sleeve
- drilling
- foundation pile
- pile hole
- drill rod
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Abstract
The utility model discloses a to the big problem of current small-size foundation construction work volume, provide a device for creeping into take shape foundation pile hole, relate to basic construction technical field. An apparatus for drilling a shaped foundation pile hole comprising a drill rod and a sleeve; the drill rod is fixedly arranged in the sleeve and coaxial with the sleeve, and a gap exists between the drill rod and the sleeve. The utility model discloses saved construction cost, device pore-forming efficiency is also high, and the pore-forming is of high quality.
Description
Technical Field
The utility model relates to a foundation construction technical field has and is a device for creeping into take shape foundation pile hole.
Background
In various construction projects, a large number of small-sized foundation constructions with relatively low requirements on bearing capacity and with diameters or widths of less than 2 meters exist, such as: the installation of mill's anticollision rail and illumination basis, this kind of small-size basis mostly only need install at ground soil layer certain degree of depth. Because a corresponding drilling hole-forming tool is lacked (the diameter of a drill rod is usually not more than 1 meter), the construction process of the conventional small foundation mainly comprises the working procedures of foundation excavation, cushion layer laying, grouting foundation formwork erecting, maintenance after grouting, later-stage layered backfilling, compaction and the like, and the construction workload is large.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that will solve is: aiming at the problem of large construction workload of the existing small foundation, the device for drilling the formed foundation pile hole is provided.
The utility model provides a technical scheme that its technical problem adopted is: an apparatus for drilling a shaped foundation pile hole comprising a drill rod and a sleeve; the drill rod is fixedly arranged in the sleeve and coaxial with the sleeve, and a gap exists between the drill rod and the sleeve.
Further, the drill rod is fixedly connected with the sleeve through a bolt.
Further, the open end of the sleeve is provided with a lower cutting edge.
Further, the open end of the sleeve is provided with a plurality of downwardly extending serrated projections which constitute the lower cutting edges.
Furthermore, the sleeve is provided with a slag overflow hole.
Furthermore, the value range of the ratio of the inner diameter of the sleeve to the outer diameter of the drill rod is 2.5-4.
The utility model has the advantages that: the utility model discloses a device for creeping into basic pile hole that takes shape adopts sleeve and drilling rod to take shape basic pile hole together with the mode formation of construction, and small-size basis (stake) construction need not carry out the basis excavation of large tracts of land, has reduced the construction work volume, has saved construction cost, and device pore-forming efficiency is also high, and the pore-forming is of high quality.
Drawings
Fig. 1 is a schematic structural diagram of the present invention;
FIG. 2 is a cross-sectional view taken along A-A of FIG. 1;
FIG. 3 is a schematic view of a lower cutting edge of an embodiment;
shown in the figure: the drill rod 1, the sleeve 2, the bolt 3, the connector 21, the lower cutting edge 22, the slag overflowing hole 23 and the protruding part 221.
Detailed Description
The present invention will be further explained with reference to the drawings and examples.
As shown in fig. 1 and 2, the device for drilling a formed foundation pile hole of the present invention comprises a drill rod 1 and a sleeve 2. 2 one end opening of sleeve sets up, and the other end seals the setting, 2 blind ends of sleeve are equipped with the connector 21 that is used for being connected with the rig, connector 21 is equipped with the external screw thread of being connected with the rig. The drill rod 1 is fixedly arranged in the sleeve 2 and is coaxial with the sleeve 2, and a gap exists between the drill rod 1 and the sleeve 2.
The device is mainly suitable for forming holes in foundation soil layers. When the hole is formed, a device which is matched with the sleeve and the inner diameter of the hole of the foundation pile to be drilled into the hole is selected, and the device is installed on a drilling machine. The device drills downwards under the propelling of a drilling machine, the size of the sleeve 2 determines the diameter of a drilled hole, the sleeve 2 moves towards the inside of soil by using the downward drilling force applied by construction machinery, the soil enters the sleeve 2, the soil entering the sleeve 2 is connected with the soil of a foundation, and the soil inside the sleeve 2 is loosened and pushed towards the closed end of the sleeve in the rotating process of the inner drill rod 1 and the sleeve together, so that the soil inside the sleeve 2 is separated from the soil of the foundation when the device is withdrawn; when the sleeve 2 is filled with soil, the device is withdrawn and unloaded out of the muck in the sleeve 2 (when the muck is unloaded, a vibrating device or a reverse rotation drilling machine and the like can be adopted), and the drilling is continued after the muck is unloaded. This device drilling adopts sleeve 2 and drilling rod 1 to form the foundation pile hole together with the mode of construction, small-size basis (stake) construction need not carry out the basis excavation of large tracts of land, construction work load has been reduced, device pore-forming efficiency is also high, and owing to the dregs are the compaction and withdraw from the device in sleeve 2 again at the in-process of creeping into, take out downthehole along with the device together, promptly, the dregs can not discharge from between pore wall and the 2 outer walls of sleeve in the drilling process, the stake hole size precision that takes shape like this is high (the hole internal diameter is unanimous with the sleeve external diameter basically), the pass is good, hang down straightness good, the pore wall is difficult for collapsing, be convenient for follow. Adopt above-mentioned device pore-forming, the basis (stake) can adopt prefabricated installation also can adopt the mode of watering.
Wherein, drilling rod 1 sets firmly can adopt modes such as welding, threaded connection, bolt connection in sleeve 2 center, and drilling rod 1 passes through bolt 3 and sleeve 2 fixed connection in figure 2, adopts the mode of bolt connection promptly, is convenient for like this according to the sleeve of different specification basis (stake) changes corresponding specification.
To facilitate the drilling of the sleeve 2 down, the open end of the sleeve 2 is provided with a lower cutting edge 22. The lower cutting edge 22 may be ground directly from the wall of the sleeve or may be provided by a separate cutting tool at the open end of the sleeve 2. As shown in fig. 3, the open end of the sleeve 2 is provided with a plurality of saw-toothed projections 221 extending downward, and the projections 221 constitute the lower cutting edges 22, so that the drilling efficiency can be improved.
The sleeve 2 is provided with a slag overflow hole 23. When the space in the sleeve 2 is filled with the slag soil, the slag soil can overflow from the slag overflow hole 23, so that the drilling condition of the device can be known conveniently. The slag overflow hole 23 may be provided in the closed end of the sleeve 2, in the figure in the side wall of the sleeve 2.
The clearance of drilling rod 1 and sleeve 2 is mainly used for depositing the dregs, and the too little drilling inefficiency in clearance, the too big interior dregs of clearance sleeve of clearance are difficult for separating with ground earth when the device withdraws from, and the size in clearance is decided by both sleeve 2 internal diameter and 1 external diameter of drilling rod, in order not only to compromise efficiency but also to make things convenient for dregs and ground earth separation, and the preferred 2 internal diameters of sleeve and 1 external diameter of drilling rod's ratio value scope is 2.5 ~ 4.
Claims (6)
1. An apparatus for drilling a formed foundation pile hole, comprising: comprises a drill rod (1) and a sleeve (2); sleeve (2) one end opening sets up, and the other end seals the setting, sleeve (2) blind end is equipped with connector (21), connector (21) are equipped with the external screw thread, drilling rod (1) sets firmly in sleeve (2), and with sleeve (2) are coaxial, drilling rod (1) with there is the clearance between sleeve (2).
2. The apparatus for drilling a shaped foundation pile hole as defined in claim 1, wherein: the drill rod (1) is fixedly connected with the sleeve (2) through a bolt (3).
3. The apparatus for drilling a shaped foundation pile hole as defined in claim 1, wherein: the open end of the sleeve (2) is provided with a lower cutting edge (22).
4. An apparatus for drilling a shaped foundation pile hole as defined in claim 3, wherein: the open end of the sleeve (2) is provided with a plurality of downwards extending saw-toothed convex parts (221), and the convex parts (221) form the lower cutting edge (22).
5. The apparatus for drilling a shaped foundation pile hole as defined in claim 1, wherein: the sleeve (2) is provided with a slag overflow hole (23).
6. The apparatus for drilling a shaped foundation pile hole as defined in claim 1, wherein: the ratio of the inner diameter of the sleeve (2) to the outer diameter of the drill rod (1) ranges from 2.5 to 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922119961.5U CN211230230U (en) | 2019-11-28 | 2019-11-28 | Device for drilling formed foundation pile hole |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922119961.5U CN211230230U (en) | 2019-11-28 | 2019-11-28 | Device for drilling formed foundation pile hole |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211230230U true CN211230230U (en) | 2020-08-11 |
Family
ID=71916886
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922119961.5U Active CN211230230U (en) | 2019-11-28 | 2019-11-28 | Device for drilling formed foundation pile hole |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211230230U (en) |
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2019
- 2019-11-28 CN CN201922119961.5U patent/CN211230230U/en active Active
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