CN210829327U - Can assist clear hole rise shell anchor head and clear hole anchor system of high negative pressure - Google Patents
Can assist clear hole rise shell anchor head and clear hole anchor system of high negative pressure Download PDFInfo
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- CN210829327U CN210829327U CN201921435205.7U CN201921435205U CN210829327U CN 210829327 U CN210829327 U CN 210829327U CN 201921435205 U CN201921435205 U CN 201921435205U CN 210829327 U CN210829327 U CN 210829327U
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Abstract
The utility model relates to a ground anchor technical field discloses a shell anchor head that rises that can assist clear hole, including the casing that rises and with the casing complex anchor lamella that rises, the multistage scraper blade that is the cockscomb structure has been laid to anchor lamella lateral surface lower part, and is multistage the external diameter of scraper blade is by supreme increase step by step down, and the opening orientation of every scraper blade is unanimous with the direction of creeping into. The high negative pressure hole cleaning anchoring system is characterized in that in the drilling process, the angle difference and the position difference of the multi-stage scrapers are utilized, broken rock walls can be effectively scraped, so that all areas of the rock walls in a critical broken state fall off, the phenomena of bonding, adhesion and the like of fragments on the rock walls can be eliminated, the auxiliary cleaning of broken surrounding rocks of different levels and different rock stratum depths is realized, the fragments are extracted from the central hole of the hollow anchor rod under the action of high negative pressure airflow, the effect of thoroughly cleaning holes is achieved, high-quality drilling is obtained, the strength of subsequent grouting is increased, and the anchoring effect is enhanced.
Description
Technical Field
The utility model relates to a ground anchor technical field, concretely relates to can assist clear hole shell anchor head that rises and clear hole anchoring system of high negative pressure.
Background
Geotechnical anchoring is an effective way to improve geotechnical engineering stability and solve complex geotechnical engineering problems. The existing rock-soil anchoring construction process usually adopts a mode of drilling first and then anchoring and grouting, and is more suitable for an expanding-shell type anchoring system. After drilling, the expanding shell type anchoring system usually generates friction with surrounding rock by expanding the expanding shell anchor head, and transmits the tensile force of the rod body to the surrounding rock and soil to achieve the effect of pre-supporting, and the strength of the supporting force is greatly influenced by the quality of rock holes. The quality of the drilled rock is mainly affected by the non-falling crushed bodies. In order to ensure the high quality of the rock hole and realize sufficient pre-stressed anchoring effect, the critical broken body of the rock hole is required to be completely separated and exposed out of the bedrock, the anchoring force is ensured to be completely applied to the bedrock, the high-strength anchoring effect is achieved, and the strength of subsequent grouting can be increased by thoroughly cleaning the hole.
At present, hole cleaning work after drilling is carried out in various modes, such as water washing hole cleaning and high-pressure air blowing hole cleaning, but certain problems exist, for example, fragments or clay after drilling during water washing hole cleaning may have the phenomena of bonding and adhesion of rock walls, and anchoring of an anchor head of a swelling shell can also be supported in a fragment or adhesive attachment structure area, so that sediment interlayers and the like are easily caused after grouting; if the hole opening is upward when the high-pressure wind blows and clears the hole, residual debris exists at the bottom, and the area of the rock hole wall in the critical crushing state cannot be guaranteed to fall off completely, the anchoring force of the anchor head of the expansion shell can be applied to the crushed surrounding rock, so that the anchoring force is insufficient, the strength is low, and even the anchor head can be used as a potential unsafe factor to cause engineering accidents. Therefore, the structure of the anchor head of the expansion shell must be improved, so that the anchor head can assist in hole cleaning, rock and soil debris in a drilled hole can be thoroughly cleaned, and the anchoring strength of the anchor head of the expansion shell is enhanced. The utility model discloses a utility model patent that grant publication number is CN206256921U discloses a slide formula that lobe can rise automatically and shell anchor head rises, and it can be fit for realizing the automatic expansion of lobe under the different construction conditions, nevertheless does not have the clastic function in the supplementary clearance drilling.
Disclosure of Invention
The utility model discloses a piece in can not thoroughly clear up drilling to current clear hole mode, and the problem that shell anchor head can not assist clear hole that rises provides the clear hole anchoring system of shell anchor head and high negative pressure that rises that can assist clear hole.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model provides a shell anchor head that rises that can assist clear hole, including the casing that rises and with the casing complex anchor lamella that rises, the multistage scraper blade that is the cockscomb structure has been laid to anchor lamella lateral surface lower part, and is multistage the external diameter of scraper blade is by supreme increase step by step down, and the opening orientation of every scraper blade is unanimous with the direction of creeping into.
Furthermore, the outer diameter of the scraper close to the middle part of the anchor valve is 1-1.5 mm larger than the bore diameter of the drill hole.
Further, the scraper blade has 3 grades, and the inclination angle of scraper blade is 20 °, 25 ° and 25 ° in proper order from bottom to top.
Further, the edge of each scraper is inlaid with a hard alloy blade.
The utility model discloses still provide clear hole anchoring system of high negative pressure, include: the high-negative-pressure vacuum pump is connected with one end of the hollow anchor rod through a hose; the expansion shell anchor head capable of assisting hole cleaning is arranged at the other end of the hollow anchor rod.
Compared with the prior art, the beneficial effects of the utility model reside in that:
the utility model discloses the multistage scraper blade that is the cockscomb structure has been laid in anchor lamella lateral surface lower part, the external diameter of multistage scraper blade is by supreme increase step by step down, in the drilling process, utilize the angle difference and the position difference of multistage scraper blade, can effectively strike off broken rock wall, make the rock pore wall be in critical broken state's regional whole drops, can eliminate classed and phenomenon such as adhere to of classed on the rock wall, realize the supplementary clearance of the broken country rock of different ranks and different rock stratum degree of depth, under the effect of high negative pressure air current, the piece is taken out from the centre bore of cavity stock, reach the effect of thoroughly clearing the hole, thereby obtain high-quality drilling, increase the intensity of follow-up slip casting, reinforcing anchor effect.
Drawings
Fig. 1 is a schematic structural view of the expanding anchor head capable of assisting hole cleaning.
Fig. 2 is a front view of the expanding anchor head of the present invention capable of assisting hole cleaning.
Fig. 3 is a schematic structural view of the expanding shell in the expanding shell anchor head of the utility model, which can assist in cleaning the hole.
Fig. 4 is a schematic structural view of an anchor flap in the expanding shell anchor head capable of assisting hole cleaning.
Fig. 5 is a schematic structural view of the high negative pressure hole cleaning anchoring system of the present invention.
In the drawings, the reference numbers: 1 is an expansion shell, 2 is an anchor flap, 3 is a scraper, 4 is a hollow anchor rod, 5 is a backing plate, 6 is a nut, and 7 is a high negative pressure vacuum pump.
Detailed Description
The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.
As shown in fig. 1-4, the expanding shell anchor head capable of assisting hole cleaning comprises an expanding shell 1 and an anchor flap 2 matched with the expanding shell 1, wherein sawtooth-shaped multi-stage scraping plates 3 are distributed on the lower portion of the outer side surface of the anchor flap 2, the outer diameters of the multi-stage scraping plates 3 are gradually increased from bottom to top, and the opening direction of each scraping plate 3 is consistent with the drilling direction. The outer diameter of the scraper 3 close to the middle part of the anchor valve 2 is 1-1.5 mm larger than the bore diameter of the drilled hole.
The scraper 3 shown in this embodiment has 3 levels, and the inclination angles of the scrapers 3 are 20 °, 25 ° and 25 ° in this order from bottom to top, and the scraper 3 at the upper end is 0.5mm larger than the outer diameter of the scraper 3 at the lower end. In the drilling process, the broken rock wall can be effectively scraped by utilizing the angle difference and the position difference of the multistage scraping plates 3, so that the region of the rock hole wall in a critical broken state is completely fallen, the phenomena of bonding, adhesion and the like of fragments on the rock wall can be eliminated, the auxiliary cleaning of broken surrounding rocks of different levels and different rock stratum depths is realized, the fragments are extracted from the central hole of the hollow anchor rod 4 under the action of high negative pressure airflow, the effect of thoroughly cleaning the hole is achieved, high-quality drilling is obtained, the strength of subsequent grouting is increased, and the anchoring effect is enhanced.
As a preferred embodiment, the edge of each flight 3 is cemented carbide tipped so that when larger rock debris is encountered, the carbide tipped blades cut the debris into smaller particles for extraction from the hollow shank by the rotational action of the drilling process.
The shell expansion anchor head adopted in the embodiment is specifically a slide way type shell expansion anchor head, and specifically refer to fig. 3 and 4, the rear end of the shell expansion 1 is hollow, sliding rails are arranged on two sides of the lower portion of the shell expansion 1, which is tongue-shaped, the anchor flap 2 is of a sheet structure with a flat upper portion and a thick lower portion, the anchor flap 2 is arranged on the sliding rails on two sides of the shell expansion 1 in a matched manner, a first grouting groove is arranged at the bottom of the sliding rails, a second grouting groove corresponding to the first grouting groove at the bottom of the sliding rails is arranged on the anchor flap 2, and after the anchor flap 2 is combined with the shell expansion, the first grouting groove and the second grouting groove are communicated with a cavity at the rear end of the shell expansion 1 and further communicated with a hollow anchor rod center hole.
As shown in fig. 5, the high negative pressure hole cleaning anchoring system comprises: the anchor rod comprises a hollow anchor rod 4, a backing plate 5, a nut 6 for fixing the hollow anchor rod 4, a high negative pressure vacuum pump 7 and the expansion shell anchor head capable of assisting hole cleaning, wherein the high negative pressure vacuum pump 7 is connected with one end of the hollow anchor rod 4 through a hose; the expansion shell anchor head capable of assisting hole cleaning is arranged at the other end of the hollow anchor rod 4.
After the drilling machine drills out the drilling, sweep clear hole with high-pressure wind earlier, through the clear hole of a high-pressure wind processing back, the combination the utility model discloses clear hole anchor system of high negative pressure is about to rise the shell anchor head and install in 4 one ends of cavity stock, and cavity stock 4 passes behind backing plate 5 fixed with nut 6, and the high negative pressure vacuum pump 7 of hose connection is used to the 4 other ends of cavity stock, and high negative pressure vacuum pump 7 specifically can adopt the HRB-H single-stage vortex air pump of the production of Jiangsu Rui Di environmental protection technology limited company. In the process of driving the expansion shell anchor head into the rock hole, the multistage scraping plates 3 at the top of the expansion shell anchor head are matched with the hollow anchor rod 4, the region of the rock hole wall in a critical crushing state is completely fallen by utilizing the angle difference and the position difference of the multistage scraping plates 3, the auxiliary cleaning of the crushed surrounding rocks of different levels and different rock stratum depths is realized, the central hole of the hollow anchor rod 4 is used as a ventilation hole, under the action of high negative pressure airflow, fragments are extracted from the central hole of the hollow anchor rod 4, the purpose of secondary hole cleaning while drilling is realized, and therefore high-quality drilling is obtained. And after hole cleaning is finished, removing the high negative pressure vacuum pump and connecting a grouting system.
The above-mentioned embodiments are only preferred embodiments of the present invention, and are not intended to limit the scope of the present invention, and it is obvious to those skilled in the art that other embodiments can be easily made by replacement or change according to the technical content disclosed in the present specification, and therefore, all changes and modifications made in the principle of the present invention should be included in the claims of the present invention.
Claims (5)
1. The expansion shell anchor head capable of assisting hole cleaning comprises an expansion shell body (1) and an anchor valve (2) matched with the expansion shell body (1), and is characterized in that multi-stage scraping plates (3) in a sawtooth shape are arranged on the lower portion of the outer side face of the anchor valve (2), the outer diameters of the multi-stage scraping plates (3) are gradually increased from bottom to top, and the opening orientation of each scraping plate (3) is consistent with the drilling direction.
2. The expanding anchor head capable of assisting hole cleaning according to claim 1, wherein the outer diameter of the scraper (3) near the middle of the anchor flap (2) is 1-1.5 mm larger than the hole diameter of the drilled hole.
3. The anchor head with the function of assisting hole cleaning of the expansion shell as claimed in claim 1, wherein the scraper (3) has 3 levels, and the inclination angle of the scraper (3) is 20 °, 25 ° and 25 ° from bottom to top.
4. An expansion anchor head capable of assisting hole cleaning according to claim 1, wherein the edge of each scraper (3) is embedded with a carbide blade.
5. Clear hole anchor system of high negative pressure, its characterized in that includes: the anchor rod comprises a hollow anchor rod (4), a backing plate (5), a nut (6) for fixing the hollow anchor rod (4), a high negative pressure vacuum pump (7) and the expansion shell anchor head capable of assisting hole cleaning according to any one of claims 1-4, wherein the high negative pressure vacuum pump (7) is connected with one end of the hollow anchor rod (4) through a hose; the expansion shell anchor head capable of assisting hole cleaning is arranged at the other end of the hollow anchor rod (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921435205.7U CN210829327U (en) | 2019-08-31 | 2019-08-31 | Can assist clear hole rise shell anchor head and clear hole anchor system of high negative pressure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921435205.7U CN210829327U (en) | 2019-08-31 | 2019-08-31 | Can assist clear hole rise shell anchor head and clear hole anchor system of high negative pressure |
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| CN210829327U true CN210829327U (en) | 2020-06-23 |
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| CN201921435205.7U Active CN210829327U (en) | 2019-08-31 | 2019-08-31 | Can assist clear hole rise shell anchor head and clear hole anchor system of high negative pressure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112228057A (en) * | 2020-09-28 | 2021-01-15 | 中煤科工开采研究院有限公司 | Coal roadway tunneling equipment and system with temporary uniform distribution supporting function |
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2019
- 2019-08-31 CN CN201921435205.7U patent/CN210829327U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112228057A (en) * | 2020-09-28 | 2021-01-15 | 中煤科工开采研究院有限公司 | Coal roadway tunneling equipment and system with temporary uniform distribution supporting function |
| CN112228057B (en) * | 2020-09-28 | 2023-01-10 | 中煤科工开采研究院有限公司 | Coal roadway tunneling equipment and system with temporary uniform distribution supporting function |
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