CN211115892U - Structure for assisting rotary digging drilling to take boulder - Google Patents
Structure for assisting rotary digging drilling to take boulder Download PDFInfo
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- CN211115892U CN211115892U CN201920769392.6U CN201920769392U CN211115892U CN 211115892 U CN211115892 U CN 211115892U CN 201920769392 U CN201920769392 U CN 201920769392U CN 211115892 U CN211115892 U CN 211115892U
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Abstract
The utility model relates to an assist and dig soon and bore and get structure of taking boulder belongs to pile foundation construction technical field, has solved among the prior art and dug soon and has bored because of the boulder with dig soon and bore the less problem that is difficult to take out partial boulder of inside frictional force. The structure comprises a drill bit, a boulder and a threaded steel bar section screwed between the inner wall of the drill bit and the boulder. The utility model has the advantages that the twisted steel section is screwed into the gap between the boulder and the inner wall of the drill bit in the drilling process of the drill bit, so that the clamping force of the drill bit on the boulder is increased, and the drill bit can take out rocks conveniently; the method is simple to operate, convenient and fast to construct, capable of improving construction efficiency and saving construction cost. Through the practical use in the field construction process, the problem that part of boulders are difficult to take out due to the fact that the boulders and the inner friction force of the rotary drilling rig are small in the rotary drilling rig is solved practically, the construction efficiency is greatly improved, and manpower and material resources are greatly saved. And the utility model discloses simple structure, the preparation is convenient, and is with low costs, and usable on-the-spot old and useless reinforcing bar forms.
Description
Technical Field
The utility model relates to a pile foundation construction technical field, especially a supplementary structure of digging soon and drilling and getting area boulder.
Background
In the construction of river channel bridges, for the river channels with poor geological conditions, if river beds are all fine sand and silty fine sand, rotary drilling is mostly adopted for pile foundation construction. However, in order to prevent flood, flood control islands are often built in riverways, and in order to prevent river water from washing the flood control islands, river departments need to fill a large amount of stones every year, so that a large amount of boulders are deposited at the lower parts of riverbeds. Therefore, the boulder is often encountered in the drilling process of the rotary drilling rig.
If the boulder is large and thick, the boulder is fully contacted with the inner wall of the drill bit, the thickness in the drill bit is large, the friction force is large, and the boulder is easy to take out. If the boulder is larger but has smaller thickness or the drill bit is positioned at the outer edge of the rock, the friction force between the boulder and the inner wall of the drill bit is smaller, and the boulder is difficult to take out.
Disclosure of Invention
The utility model discloses a solve the technical problem that exists among the known art and provide an assist and dig soon and bore and get the structure of taking boulder, adopt this structure can make things convenient for the drill bit to take out the rock in the pile foundation hole.
The utility model discloses a solve the technical scheme that technical problem that exists among the well-known technique took and be: a structure for assisting rotary drilling to drill boulders comprises a drill bit, boulders and a threaded steel bar section screwed between the inner wall of the drill bit and the boulders.
The diameter of the twisted steel section is phi 20-36 mm, and the length is 30-50 cm.
The number of the twisted steel sections put into the pile foundation hole is 10-20.
The utility model has the advantages and positive effects that: in the drilling process of the drill bit, the threaded steel bar section is screwed into a gap between the boulder and the inner wall of the drill bit, so that the clamping force of the drill bit on the boulder is increased, and the drill bit can take out rocks conveniently; the method is simple to operate, convenient and fast to construct, capable of improving construction efficiency and saving construction cost. Through the practical use in the field construction process, the problem that part of boulders are difficult to take out due to the fact that the boulders and the inner friction force of the rotary drilling rig are small in the rotary drilling rig is solved practically, the construction efficiency is greatly improved, and manpower and material resources are greatly saved. And the utility model discloses simple structure, the preparation is convenient, and is with low costs, and usable on-the-spot old and useless reinforcing bar forms.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
In the figure: 1. a drill bit; 2. boulders; 3. a twisted steel section.
Detailed Description
For further understanding of the contents, features and effects of the present invention, the following embodiments are exemplified and will be described in detail with reference to the accompanying drawings:
referring to fig. 1, the structure for assisting the rotary drilling to drill the boulder comprises a drill bit 1, a boulder 2 and a twisted steel bar section 3 screwed between the inner wall of the drill bit 1 and the boulder 2.
In the embodiment, the diameter of the twisted steel section 3 is preferably 20 to 36mm, and the length is preferably 30 to 50 cm. The number of the twisted steel sections 3 which are put into the pile foundation hole is 10-20.
During construction, 10-20 twisted steel sections 3 are taken and put into the pile foundation hole. The number and size of rebar sections 3 can be adjusted according to the drill size. And when the threaded steel bar section 3 sinks into the bottom of the pile foundation hole, the rotary drilling rig drills, a part of the threaded steel bar section 3 is screwed into a gap between the inner wall of the drill bit and the boulder, and then the drill bit is tried to be lifted. And if the boulder is not taken out, drilling the rotary drilling rig again and then trying to lift the drill bit until the boulder is taken out.
Although the preferred embodiments of the present invention have been described with reference to the accompanying drawings, the present invention is not limited to the above-mentioned embodiments, which are only illustrative and not restrictive, and those skilled in the art can make many forms without departing from the spirit and scope of the present invention, which is within the scope of the present invention.
Claims (2)
1. The structure is characterized by comprising a plurality of twisted steel sections thrown into a pile foundation hole, wherein the diameter of each twisted steel section is phi 20-36 mm, the length of each twisted steel section is 30-50 cm, and when the boulder is drilled in a rotary drilling mode, each twisted steel section is screwed between the inner wall of a drill bit and the boulder.
2. The structure for assisting in rotary drilling and drilling boulders in claim 1 is characterized in that 10-20 twisted steel sections are put into a pile foundation hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920769392.6U CN211115892U (en) | 2019-05-23 | 2019-05-23 | Structure for assisting rotary digging drilling to take boulder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920769392.6U CN211115892U (en) | 2019-05-23 | 2019-05-23 | Structure for assisting rotary digging drilling to take boulder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211115892U true CN211115892U (en) | 2020-07-28 |
Family
ID=71699109
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920769392.6U Active CN211115892U (en) | 2019-05-23 | 2019-05-23 | Structure for assisting rotary digging drilling to take boulder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211115892U (en) |
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2019
- 2019-05-23 CN CN201920769392.6U patent/CN211115892U/en active Active
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