CN215332643U - Percussion drilling tool for earth filling exploration - Google Patents
Percussion drilling tool for earth filling exploration Download PDFInfo
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- CN215332643U CN215332643U CN202120585395.1U CN202120585395U CN215332643U CN 215332643 U CN215332643 U CN 215332643U CN 202120585395 U CN202120585395 U CN 202120585395U CN 215332643 U CN215332643 U CN 215332643U
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Abstract
The utility model discloses an impact drilling tool for soil filling exploration, which is characterized by comprising a toothed inner pipe (2), a pipe shoe (1) connected to the lower end of the toothed inner pipe (2), a piston sleeve (3) connected to the upper end of the toothed inner pipe (2), a lower joint (4) connected to the upper end of the piston sleeve (3), a piston assembly with the lower end positioned in the piston sleeve (3) and the upper end penetrating through the lower joint (4), and an impact hammer (7) connected with the upper end of the piston assembly through an upper joint (5). The piston sleeve is provided with the vent hole, the piston can move up and down in the piston sleeve, and when the piston is lifted upwards to impact the drilling tool, the piston moves upwards so as to discharge air in the piston sleeve from the vent hole, so that negative pressure is formed in the piston sleeve and the toothed inner tube, the probability that a rock core falls out of the toothed inner tube is reduced, and the coring rate is improved.
Description
Technical Field
The utility model relates to the technical field of geotechnical engineering investigation, in particular to an impact drilling tool for filling exploration.
Background
In geotechnical engineering investigation projects, filling as special rock is one of the most common rock and soil types, is influenced by human engineering activities, and is increasingly widely distributed. The geotechnical engineering investigation code (GB50021-2001) (2009 edition) 6.5.1 states that the following ingredients are classified according to causes and material compositions of fill:
(1) plain filling: mainly comprises cohesive soil, sand or gravels, does not contain impurities or contains few impurities, and has an organic matter content of not more than 10 percent;
(2) filling soil with impurities: mainly uses building garbage, domestic garbage or industrial waste, etc.;
(3) filling soil: the sediment such as mud and sand at the bottom of the water is dug and flushed to the two banks of the river by a hydraulic flushing method to be accumulated;
(4) compacting and filling soil: the material is prepared by controlling the components, density and water content according to certain standards and compacting or tamping in layers.
The research and evaluation of artificial filling mainly finds out the composition, distribution and accumulation age of the filling, judges the uniformity of soil, combines local building experience to provide some treatment methods for soil quality improvement, and adopts structures and measures suitable for the uneven settlement of foundation. With the accelerating promotion of urbanization process and old city reconstruction, the construction land resources are increasingly tense, the land price is increasingly expensive, original idle deep filling fields are developed and constructed, and a plurality of filling fields with different thicknesses exist in old city areas of a plurality of cities for historical reasons. When the deep filling soil is used as foundation soil, if the filling replacement treatment is adopted, the construction cost is high, the construction period is long, and the filling replacement quality is difficult to control; if buildings, pipelines and the like exist around the deep filling site, the safety and stability of the foundation pit side slope can be caused when a filling change scheme is adopted; if underground water is encountered in the replacement depth, the problems are more and the difficulty is higher. Therefore, on the basis of fully investigating and knowing the filling characteristics, a targeted reasonable utilization and treatment scheme is provided, so that the 'useless' waste filling field can be changed into a useful field, land resources can be saved, surrounding buildings (structures) can be protected, and the regional environment can be improved.
The filling soil is arranged on the upper part of the stratum, and is a random disordered accumulation body formed by random stacking in the processes of human engineering and living activities. In general, the filling is not suitable to be directly used as a foundation bearing layer of a newly built (constructed) building. Due to its special cause, the engineering sense has its particularity, such as low bearing capacity, high compressibility, uneven distribution, insufficient consolidation, etc., which are characteristics unfavorable for engineering safety. It is important to find out the thickness, range and main components of the filling. At present, in the engineering exploration drilling process, the existing drilling tool has the following defects: 1. in the percussion drilling process, the core taking rate is low, and when the miscellaneous filling soil is drilled, the drilling is difficult due to the complex and loose miscellaneous filling soil components, and the core taking rate is 0%; 2. drilling in the filled soil, stopping drilling only when large particles are met, moving the drilling position and then re-drilling, wherein the filled soil components and distribution are irregular, and sometimes, the situation that the drilling movement for a plurality of times cannot be avoided can be avoided, so that the construction period is delayed; 3. the upper part filled with soil (within 3.0 meters) adopts a rotary drilling process without conditions; 4. the rotary drilling process is adopted in the filling (miscellaneous filling), so that the drill bit is seriously damaged, and meanwhile, the retaining wall slurry is leaked, and the cost is high.
In order to achieve the purpose of fully utilizing the filling field, the filling with special properties needs to be paid special attention when geotechnical engineering investigation is carried out, specific detailed investigation is carried out, and scientific basis can be provided for later-stage reasonable utilization. In recent years, when the engineering investigation of the filling field is carried out, the investigation of the filling is lack of means, the result is not accurate enough, the full disclosure of the components, the distribution rule and the characteristics of the filling is difficult to satisfy, the engineering construction period is delayed and economic loss is not small if the result is light, and quality safety accidents and casualties are caused if the result is heavy. Therefore, it is necessary to develop a percussion drill which can be used for earth-filling exploration for geotechnical engineering investigation.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problems and achieve the purposes of finding out the thickness, the range, the main components and the like of the filling soil, the utility model provides the impact drilling tool for filling soil exploration.
The purpose of the utility model is realized by the following technical scheme: an impact drilling tool for filling exploration comprises a toothed inner pipe, a pipe shoe connected to the lower end of the toothed inner pipe, a piston sleeve connected to the upper end of the toothed inner pipe, a lower connector connected to the upper end of the piston sleeve, a piston assembly with the lower end located in the piston sleeve and the upper end penetrating through the lower connector, and an impact hammer connected with the upper end of the piston assembly through an upper connector; the piston assembly can move up and down in the piston sleeve, and the upper joint can strike the lower joint when the piston assembly moves down.
The piston assembly comprises a piston arranged in the piston sleeve, and a piston rod, wherein the lower end of the piston rod is connected with the piston, and the upper end of the piston rod penetrates through the lower joint and then is connected with the impact hammer through the upper joint.
The piston sleeve is provided with a plurality of exhaust holes, and the exhaust holes are located above the piston.
The number of the vent holes is 4, and the diameter of the vent holes is 6 mm.
The inner wall of the dentate inner pipe is provided with a plurality of dentate bulges.
The height of the dentate projections is 1 mm-3 mm, and the distance between two adjacent dentate projections is 20 mm-40 mm.
The tooth-shaped inner pipe is composed of two detachable arc-shaped plate blocks.
And an impact hammer sleeve is sleeved on the outer side of the impact hammer.
Compared with the prior art, the utility model has the following advantages and beneficial effects:
(1) the piston sleeve is provided with the vent hole, the piston can move up and down in the piston sleeve, and when the piston is lifted upwards to impact the drilling tool, the piston moves upwards so as to discharge air in the piston sleeve from the vent hole, so that negative pressure is formed in the piston sleeve and the toothed inner tube, the probability that a rock core falls out of the toothed inner tube is reduced, and the coring rate is improved.
(2) The inner wall of the toothed inner pipe is provided with the toothed protrusions, so that the friction force between the rock core and the toothed inner pipe is improved, the probability that the rock core falls out of the toothed inner pipe is further reduced, and the coring rate is improved.
(3) The tooth-shaped inner pipe is composed of two detachable arc-shaped plate blocks, and the two arc-shaped plate blocks can be detached after coring is completed, so that a core can be taken out conveniently.
Drawings
FIG. 1 is a block diagram of the present invention.
Fig. 2 is a sectional view showing a lifting operation state of the present invention.
Fig. 3 is a sectional view showing the drilling operation state of the present invention.
Fig. 4 is an enlarged schematic view of a portion a of fig. 3.
The reference numbers in the above figures refer to: the device comprises a pipe boot 1, a toothed inner pipe 2, a piston sleeve 3, a lower joint 4, an upper joint 5, an impact hammer sleeve 6, an impact hammer 7, a piston rod 8, an exhaust hole 9, a piston 10 and a toothed protrusion 11.
Detailed Description
The present invention will be described in further detail with reference to examples, but the embodiments of the present invention are not limited thereto.
Examples
As shown in fig. 1 to 3, the impact drill for earth-filling exploration of the present invention includes a pipe shoe 1, a toothed inner pipe 2, a piston sleeve 3, a lower joint 4, a piston assembly, an upper joint 5, and an impact hammer 7. The pipe boot 1 is detachably connected to the lower end of the toothed inner pipe 2 by means of a threaded connection, and the piston sleeve 3 is detachably connected to the upper end of the toothed inner pipe 2 by means of a threaded connection. The lower joint 4 is disposed at the upper end of the piston sleeve 3, and may be screwed to the piston sleeve 3 or may be integrally formed with the piston sleeve 3. The lower end of the piston assembly extends into the piston sleeve 3, and the upper end of the piston assembly penetrates through the lower connector 4 and then is connected with the impact hammer 7 through the upper connector 5. The hammer 7 is able to drive the piston assembly up and down within the piston sleeve 3 and the upper sub 5 is able to strike the lower sub 4 when the hammer 7 drives the piston assembly down.
As shown in fig. 2 and 3, the piston assembly includes a piston 10, a piston rod 8 connected to the piston 10 at a lower end thereof; the piston rod 8 can be connected to the piston 10 by means of a threaded connection. Specifically, the piston 10 is arranged in the piston sleeve 3, and the upper end of the piston rod 8 penetrates through the lower joint 4 and then is connected with the impact hammer 7 through the upper joint 5. The hammer 7 drives the piston 10 up and down in the piston sleeve 3 via the piston rod 8.
In order to protect the impact hammer 7, the impact hammer sleeve 6 is sleeved on the outer side of the impact hammer 7.
As shown in fig. 2 and 3, the piston sleeve 3 is provided with a plurality of exhaust holes 9, and the exhaust holes 9 are located above the piston 10. In this embodiment, the number of the vent holes 9 is 4, and the diameter of the vent hole 9 is 6 mm. When the piston 10 moves upwards, air in the piston sleeve 3 can be exhausted to the outside of the percussion drill through the exhaust hole 9, so that negative pressure is formed inside the piston sleeve 3 and the toothed inner pipe 2, the probability that the core falls out of the toothed inner pipe is reduced, and the coring rate is improved.
In order to increase the friction between the core and the toothed inner tube 2, the inner wall of the toothed inner tube 2 is provided with a number of toothed protrusions 11, as shown in fig. 4. In this embodiment, the height of the tooth-like protrusions 11 is 1mm to 3mm, and the distance between two adjacent tooth-like protrusions 11 is 20mm to 40 mm.
In use, the percussion drill is positioned vertically in the ground, the shoe 1 is brought into contact with the ground, and initially the percussion drill is in tension, as shown in figure 2. The impact hammer 7 is started, the impact hammer 7 drives the piston assembly to move up and down repeatedly, when the piston assembly moves downwards, the upper connector 5 impacts the lower connector 4, and the pipe shoe 1 and the toothed inner pipe 2 are inserted into the filling soil through the impact force as shown in fig. 3. When the inner toothed pipe 2 is filled with the filling soil, the impact hammer 7 lifts the piston 10, the piston 10 drives the piston sleeve 3, the inner toothed pipe 2 and the pipe shoe 1 to move upwards and pull out the filling soil, and at the moment, the inner toothed pipe 2 is detached and the core is taken out. For more convenient taking out the core, the dentate inner tube 2 is composed of two detachable arc-shaped plate blocks, and the core can be better taken out by disassembling the two arc-shaped plate blocks.
In addition, when the core drilling tool is used specifically, if the core taking rate is low in the drilling process, a certain amount of auxiliary slurry such as slurry or vegetable gum can be poured into the core taking hole, and after the wall protection slurry enters the bottom of the hole, the drilling tool is lifted slowly, and the core is taken out. The auxiliary slurry is used for filling the soil filling gap, blocking the pipe orifice of the drilling tool, and the piston upwards discharges air in the drilling tool, so that a negative pressure state is better formed in the drilling tool, the drilling tool is slowly lifted, and the core is taken out.
As another preferable scheme, the utility model can also be used together with a flat shovel, the total length of the flat shovel is 250mm, the functional section length is 200mm, the width is 100mm, and the thickness is 5-50 mm, and the flat shovel is forged by high-strength steel. The flat shovel has the main function of crushing large-diameter particles and eliminating drilling obstacles.
As described above, the present invention can be preferably realized.
Claims (8)
1. The impact drilling tool for the soil filling exploration is characterized by comprising a toothed inner pipe (2), a pipe shoe (1) connected to the lower end of the toothed inner pipe (2), a piston sleeve (3) connected to the upper end of the toothed inner pipe (2), a lower joint (4) connected to the upper end of the piston sleeve (3), a piston assembly of which the lower end is positioned in the piston sleeve (3) and the upper end penetrates through the lower joint (4), and an impact hammer (7) connected with the upper end of the piston assembly through an upper joint (5); the piston assembly can move up and down in the piston sleeve (3), and the upper joint (5) can impact the lower joint (4) when the piston assembly moves down.
2. A percussion drill tool for earth-filling exploration according to claim 1, characterized in that the piston assembly comprises a piston (10) arranged inside a piston sleeve (3), a piston rod (8) connected at its lower end to the piston (10) and at its upper end to the percussion hammer (7) through an upper joint (5) after passing through the lower joint (4).
3. A percussion drill for earth-filling exploration according to claim 2, characterized in that the piston sleeve (3) is provided with a number of venting holes (9), said venting holes (9) being located above the piston (10).
4. A percussion drill for earth-filling exploration according to claim 3, characterized in that the number of said venting holes (9) is 4, the diameter of the venting holes (9) being 6 mm.
5. A percussion drill for earth-filling exploration according to claim 1, characterized in that the inner wall of the toothed inner tube (2) is provided with a number of toothed protrusions (11).
6. A percussion drill for earth-filling exploration according to claim 5, characterized in that the height of the tooth-like projections (11) is between 1mm and 3mm and the distance between two adjacent tooth-like projections (11) is between 20mm and 40 mm.
7. A percussion drill for earth-filling exploration according to any of claims 1 to 6, characterized in that the toothed inner tube (2) consists of two detachable arc-shaped panels.
8. A percussion drill for earth-filling exploration according to claim 1, characterized in that the outside of the percussion hammer (7) is sleeved with a percussion hammer sleeve (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120585395.1U CN215332643U (en) | 2021-03-23 | 2021-03-23 | Percussion drilling tool for earth filling exploration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120585395.1U CN215332643U (en) | 2021-03-23 | 2021-03-23 | Percussion drilling tool for earth filling exploration |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215332643U true CN215332643U (en) | 2021-12-28 |
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ID=79584269
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120585395.1U Active CN215332643U (en) | 2021-03-23 | 2021-03-23 | Percussion drilling tool for earth filling exploration |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215332643U (en) |
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2021
- 2021-03-23 CN CN202120585395.1U patent/CN215332643U/en active Active
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